天津大学学报(自然科学与工程技术版) /zrb/oa 封一 /zrb/oa/darticle.aspx?type=view&id=202002000 2020年02月01 00:00 2020年02 0 820859 目录 /zrb/oa/darticle.aspx?type=view&id=202002001 2020年02月01 00:00 2020年02 0 126303 <span>含内部冲刷腐蚀损伤的90°弯管屈曲压力的研究</span> <br /> /zrb/oa/darticle.aspx?type=view&id=202002002 <span> <span style="font-family: 方正楷体简体; font-size: 9pt;">针对深海油气输送管道中含冲刷腐蚀损伤的</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">90°</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">弯管的屈曲问题,建立了一种更符合实际损伤的简化模型,得到了冲刷腐蚀屈曲类型分布图,提出了一个按不同分类屈曲形式计算含冲刷腐蚀损伤的</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">90°</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">弯管屈曲压力的显式经验表达式.根据试验数据,建立了含冲刷腐蚀损伤的</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">90°</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">弯管的原尺寸模型,通过用户自定义</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Python</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">程序实现自主调整冲刷腐蚀的损伤参数</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">轴向范围、周向宽度、径向深度</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">及管道几何参数</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">椭圆度、径厚比和腐蚀比</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">.通过将自定义程序嵌入</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Abaqus</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">有限元软件,建立了冲刷腐蚀简化模型,开展系统的敏感性分析.分析表明,径向最大腐蚀深度会限制轴向范围影响和周向宽度影响程度,且径向最大腐蚀深度和冲刷腐蚀轴向范围会影响弯管模型的屈曲类型,出现了</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">3</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">种屈曲模态,研究表明不同的损伤参数导致</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">3</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">种不同屈曲模态:</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">①</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">A</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">类屈曲,弯管端部及其附加直管部位率先发生屈曲;</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">②</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">B</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">类屈曲,冲刷腐蚀最大深度截面的环向</span> <i> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">φ</span> </i> <span style="font-family: 方正楷体简体; font-size: 9pt;">=</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">45°</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">处率先发生屈曲;</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">③</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">C</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">类屈曲,冲刷腐蚀最大深度处率先发生屈曲.依据屈曲类型划分出冲刷腐蚀屈曲类型分布图.根据数值模拟和敏感性分析结果,结合多参数非线性回归分析</span> <span style="font-family: 方正书宋简体; font-size: 9pt;">,</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">建立了无量纲屈曲压力</span> <i> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">p</span> </i> <sub> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">c</span> </sub> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">/<i>p</i><sub>y</sub></span> <span style="font-family: 方正楷体简体; font-size: 9pt;">和椭圆度</span> <i> <span style="font-family: Symbol; font-size: 9pt;">D</span> </i> <span style="font-family: 方正楷体简体; font-size: 9pt;">、径厚比</span> <i> <span style="font-family: Symbol; font-size: 9pt;">a</span> </i> <span style="font-family: 方正楷体简体; font-size: 9pt;">、弯径比</span> <i> <span style="font-family: Symbol; font-size: 9pt;">l</span> </i> <span style="font-family: 方正楷体简体; font-size: 9pt;">、无量纲腐蚀深度</span> <i> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">D</span> </i> <sub> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">e,m</span> </sub> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">/<i>t</i></span> <span style="font-family: 方正楷体简体; font-size: 9pt;">、腐蚀比</span> <i> <span style="font-family: Symbol; font-size: 9pt;">a </span> </i> <span style="font-family: 方正楷体简体; font-size: 9pt;">之间的经验公式.本文的研究结果可为冲刷腐蚀作用下的海底油气输送弯管的屈曲强度评估提供</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">依据.</span></span> <br /> 2020年02月01 00:00 2020年02 111 121 2293355 <span>余建星<sup>1, 2</sup>,金成行<sup>1, 2</sup>,王华昆<sup>1, 2</sup>,余 杨<sup>1, 2</sup>,王昭宇<sup>1, 2</sup>,谭玉娜</span> <sup>1, 2</sup> <br /> <span>柴油污染粉土水油分布的核磁共振试验研究</span> <br /> /zrb/oa/darticle.aspx?type=view&id=202002003 <span> <span style="font-family: 方正楷体简体; font-size: 9pt;">为研究柴油污染粉土中水油两相在孔隙中的分布特征,利用低场核磁共振技术对人工制备的柴油污染粉土进行了室内试验研究</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">. </span> <span style="font-family: 方正楷体简体; font-size: 9pt;">试验选用江苏宿迁地区粉土为试验土,选用</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">0</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">号柴油作为污染物,采用聚四氟乙烯圆筒作为制样模具和试样容器,采用压样法进行制样,利用</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">MesoMR23</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">60H</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">型中尺寸核磁共振成像分析仪测试试样</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">. </span> <span style="font-family: 方正楷体简体; font-size: 9pt;">通过</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">7</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">组试验,对比研究了不同含水量、柴油含量和制样方法对柴油污染粉土的油水分布状态的影响</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">. </span> <span style="font-family: 方正楷体简体; font-size: 9pt;">利用锰离子加快水弛豫的特性,其中</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">3</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">组试样的孔隙水中添加</span> <span style="letter-spacing: 2pt; font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">5</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">g</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">/L</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">氯化锰,刚好将油和水的信号区分开</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">. </span> <span style="font-family: 方正楷体简体; font-size: 9pt;">由于锰离子浓度较小,可以忽略其对粉土中水分分布的影响</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">. </span> <span style="font-family: 方正楷体简体; font-size: 9pt;">通过低场核磁共振得到柴油污染粉土的横向弛豫时间</span> <i> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">T</span> </i> <sub> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">2</span> </sub> <span style="font-family: 方正楷体简体; font-size: 9pt;">分布曲线,从微细观的角度分析了柴油污染粉土中柴油和水的孔隙分布规律</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">. </span> <span style="font-family: 方正楷体简体; font-size: 9pt;">试验结果表明:适宜浓度的氯化锰可缩短油水两相体系中水的横向弛豫时间</span> <i> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">T</span> </i> <sub> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">2</span> </sub> <span style="font-family: 方正楷体简体; font-size: 9pt;">,从而分离水油信号;孔隙液为单相时,柴油比水更易优先占据大孔隙空间;当先加水后加柴油制样时,增加含油量会使孔隙液占据孔隙的孔径分布区间更加集中,孔隙液向较大孔径孔隙集中分布;先加柴油后加水制样时,柴油优先占据大孔径的孔隙,迫使后加入的水更易分布在较大孔径的孔隙</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">.</span> </span> <br /> 2020年02月01 00:00 2020年02 122 128 828077 <span>毛柏杨<sup>1, 2</sup>,刘松玉<sup>1, 2</sup>,刘志彬</span> <sup>1, 2</sup> <br /> <span>2007—2017 年渤海藻华事件的时空分布特征</span> <br /> /zrb/oa/darticle.aspx?type=view&id=202002004 <span> <span style="font-family: 方正楷体简体; font-size: 9pt;">藻华对海洋生态环境有重要的影响.叶绿素</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">a</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">是浮游植物光合作用的主要色素,其变化可以反映藻华的总体特征.通过分析叶绿素</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">a</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">浓度的均值和累计方差分别得到</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">2007—2017</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">年渤海浮游植物的空间分布特征和藻华的开始时间,并统计了藻华事件的发生次数、持续时间和藻华期间叶绿素</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">a</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">浓度的增长率、增长幅度等特征变量;用经验正交函数方法分析了部分特征变量的空间及年际变化;讨论了风力混合强度对藻华事件的影响.结果表明:渤海叶绿素</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">a</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">浓度在空间上呈近岸高、中部海域低的分布特征;辽东湾区域藻华事件发生次数较多,其他近岸海域的发生次数较少;近岸海域藻华事件的开始时间比中部海域相对较晚;叶绿素</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">a</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">浓度的增长率基本呈现出从近岸到远海逐渐增大且春季增长率比夏秋季偏高的趋势;在叶绿素</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">a</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">浓度的增长幅度上,北部海域低于南部海域;以</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">2011</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">年为转折点,近年来春季藻华持续时间比夏秋季长;在年际变化上春季的开始时间和增长幅度变化特征基本一致,与叶绿素</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">a</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">浓度增长率的特征相反;夏秋季藻华的上述空间分布特征在</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">2008</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">年、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">2012</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">年比其他年份更明显;风力混合强度与藻华的开始时间相关性较强,与叶绿素</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">a</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">浓度的增长率关系较弱,与增长幅度基本无关.对于渤海藻华事件的时空分布特征的分析,有助于增进对渤海生态系统特征及其影响因素的认识.</span> </span> <br /> 2020年02月01 00:00 2020年02 129 137 3921754 <span>袁德奎<sup>1</sup>,杨训伟<sup>1</sup>,王 雪<sup>1</sup>,李顺芹</span> <sup>2</sup> <br /> <span>基于单目视觉的高速并联机器人动态目标跟踪算法</span> <br /> /zrb/oa/darticle.aspx?type=view&id=202002005 <span> <span style="font-family: 方正楷体简体; font-size: 9pt;">在</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">高速并联机器人视觉分拣系统中,由于安装误差等原因,视觉系统与传送带以及机器人与传送带之间会存在一定的角度偏差,导致目标物体在分拣系统中的定位精度较低,使机器人末端不能精确抓取动态目标</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">.</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">而且传统的单目视觉定位及跟踪算法存在精度低、运算速度慢等问题,影响视觉分拣系统的计算速度,降低系统的实时性</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">.</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">针对以上问题,提出了一种基于圆特征的单目视觉定位与传送带标定结合的动态目标跟踪算法,首先不需考虑相机坐标系与传送带坐标系的角度偏差,拍摄一个圆形目标,并以光心为顶点构造直椭圆锥的几何成像模型</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">.</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">在此基础上利用其几何关系求取圆心在相机坐标系下的深度信息,再结合传送带标定与张正友标定方法,确定传送带编码器的比例因子以及机器人坐标系和传送带坐标系之间的角度偏差,并实时跟踪圆形目标运动过程中圆心在机器人下的位置</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">.</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">最后,对所提算法和传统算法分别进行实验对比,结果表明,该动态跟踪算法通过圆锥投影的几何关系推导圆心的空间坐标,避免了传统复杂的非线性方程求解,定位精度和计算速度大幅提高</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">.</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">该算法消除了传统算法的角度偏差,平均位置误差为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">0.8<span style="letter-spacing: 2pt;">2</span>mm</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,具有较高的定位精度</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">.</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">运行中系统耗时较短,运行效率得到了有效提高,且误抓率和漏抓率分别为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">0.2</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">%</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">和</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">0</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,具有很高的实用价值</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">.</span> </span> <br /> 2020年02月01 00:00 2020年02 138 146 1599732 <span>梅江平,王 浩,张 舵,闫 寒,李 策</span> <br /> <span>基于超像素运动统计的误匹配去除方法</span> <br /> /zrb/oa/darticle.aspx?type=view&id=202002006 <span> <span style="font-family: 方正楷体简体; font-size: 9pt;">特征匹配是实现图像配准的重要手段,然而特征匹配中往往存在大量的误匹配,对于存在非刚性形变和大位移运动的图像序列尤为严重;如何从初始匹配结果中找到准确可靠的匹配点集,是提升图像配准性能的关键.为解决上述问题,首先根据图像的空间和色彩相似性,利用改进的超像素分割算法对图像进行分割;分割后的超像素块在空间上紧密相连,严格遵循图像轮廓边缘,且在同一区域内的颜色纹理基本趋于一致,可保证内部特征点具有相同或一致的运动趋势;同时,采用</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">ORB</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">算子对图像进行特征提取与描述,并利用暴力匹配算法得到初始匹配点集.其次,在超像素运动一致性约束下,提出了一种基于超像素运动统计模型的误匹配去除算法.通过建立超像素网格统计模型,将初始匹配坐标分配至相应的超像素区域,利用累加器计算出每个超像素对的匹配度,将初始匹配的概率分布特性转换为统计特性.最后,根据超像素匹配度的差异,计算出正确匹配的掩膜图像,实现了误匹配点的自动识别和剔除.仿真实验结果表明,与当前的误匹配去除算法相比,本文算法不依赖于复杂的参数模型,具有较高的鲁棒性,运算速度较快,可有效去除非刚性形变图像配准过程中产生的误匹配.</span> </span> <br /> 2020年02月01 00:00 2020年02 147 153 3431323 <span>何 凯,王 阳,刘志国,马红悦</span> <br /> <span>引燃油喷射时刻对着火特性和压力振荡影响的研究</span> <br /> /zrb/oa/darticle.aspx?type=view&id=202002007 <span> <span style="font-family: 方正楷体简体; font-size: 9pt;">为提高天然气</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">/</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">柴油双燃料船用低速发动机低负荷时的燃烧稳定性、避免高负荷时爆震发生,采用三维数值模拟的方法,研究了实际双燃料发动机中引燃油喷射时刻对缸内混合气的着火</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">/</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">燃烧特性及缸内压力振荡的影响.结果表明:甲烷当量比为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">0.38</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">的工况,引燃油喷射时刻的推迟会造成缸内甲烷</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">/</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">空气混合气的着火时刻和燃烧相位推迟,缸内压力减小且爆压相位滞后;当喷射时刻推迟至</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">2.</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">0</span> <span style="letter-spacing: 2pt; font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">°</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">CA</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;"> BTDC</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">时,缸内压力峰值低于</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">1<span style="letter-spacing: 2pt;">0</span>MPa</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,说明燃烧严重恶化,甚至出现失火现象.甲烷当量比为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">0.50</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">的工况,引燃油喷射时刻的推迟使缸内压力振荡幅度增大且振荡发生的时刻推迟,当喷油时刻推迟至</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">2.</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">0</span> <span style="letter-spacing: 2pt; font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">°</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">CA</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;"> BTDC</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">时,甲烷</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">/</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">空气混合气在引燃油喷射之前发生自燃;此外,喷油时刻的推迟会导致火焰发展速度加快且火焰前端燃烧更为剧烈,易在靠近壁面的狭小空间内产生压力振荡.</span> </span> <br /> 2020年02月01 00:00 2020年02 154 161 2236850 <span>刘昌文<sup>1</sup>,刘宗宽<sup>1</sup>,刘 博<sup>2</sup>,周 磊<sup>1</sup>,卫海桥</span> <sup>1</sup> <br /> <span>轴向及内压复合作用下Zr-Sn-Nb/Zr-Nb 合金的多轴棘轮效应研究</span> <br /> /zrb/oa/darticle.aspx?type=view&id=202002008 <span> <span style="font-family: 方正楷体简体; font-size: 9pt;">为了模拟锆合金包壳在发生反应性引入事故</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">RIA</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">时的多轴应力状态,对</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Sn</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb/Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">合金进行了单轴对称循环试验以及在内压及轴向载荷复合作用下的多轴试验,研究了两种合金轴向</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">/</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">环向棘轮应变的累积特性与内压及轴向应力的相关性.单轴拉伸试验结果表明,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Sn</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">合金和</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">合金的弹性模量相近均为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">8<span style="letter-spacing: 2pt;">5</span>GPa</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,屈服强度大约均为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">49<span style="letter-spacing: 2pt;">0</span>MPa</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">.单轴棘轮试验结果表明,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Sn</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">合金和</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">合金在较小应力幅值下,由于无法启动孪生</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">退孪生机制,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Sn</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">合金和</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">合金都处于安定状态.当轴向应力幅大于</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">32<span style="letter-spacing: 2pt;">5</span>MPa</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">时,孪生</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">退孪生机制启动,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Sn</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">合金和</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">合金的轴向棘轮应变都在正方向上快速增加.由于泊松效应,环向棘轮应变则在负方向上累积.多轴棘轮试验结果表明,在恒定内压和不同轴向应力幅值的循环作用下,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Sn</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">合金和</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">合金的环向棘轮应变随轴向应力幅值的增大而增大.当轴向应力幅值大于</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">32<span style="letter-spacing: 2pt;">5</span>MPa</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">时,轴向棘轮应变呈现先负向累积、后正向累积的特殊现象;同时环向棘轮应变也随应力幅值增大而增大.在相同轴向应力幅值和不同内压加载下,内压对轴向棘轮应变呈现抑制作用,并且随内压的增大,其抑制作用更为显著.同时,内压对环向棘轮应变有明显的促进作用,导致环向应变快速正向累积.在轴向力和内压加载条件相同的情况下,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Sn</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">合金的轴向和环向棘轮应变比</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">合金小,说明</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zr</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Sn</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Nb</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">合金包壳管抵抗棘轮变形的能力更强.</span> </span> <br /> 2020年02月01 00:00 2020年02 162 168 1635757 <span>陈 刚<sup>1</sup>,瞿 欢<sup>1</sup>,崔 云<sup>1, 2</sup>,陈 旭</span> <sup>1</sup> <br /> <span>氨苄西林晶体形貌模拟</span> <br /> /zrb/oa/darticle.aspx?type=view&id=202002009 <span>氨苄西林是一种半合成青霉素,较天然青霉素有更高的稳定性和更广泛的抗菌谱.通过密度泛函方法计算了氨苄西林晶体内分子间作用力,在此基础上利用Material Studio 分子模拟软件采用螺旋生长模型对氨苄西林在水溶液环境中生长的晶体形貌进行了模拟,并与BFDH 模型、AE 模型、动力学蒙特卡罗方法拟合的结果以及水溶液中生长的实际晶体进行比较.结果表明,氨苄西林晶习为长棒状,其{0 11}和{100}晶面族为主要显露晶面.氨苄西林晶体中存在高度各向异性的非键相互作用,其中[001]和[100]方向上的非键相互作用主要由氢键、极性力和两性官能团的静电相互作用构成.通过螺旋生长模型得到的理论晶习能很好地与实验制备的晶习吻合,但是传统方法如BFDH 和AE 模型无法准确模拟氨苄西林的晶习.基于螺旋生长机理分析,晶体的分子间相互作用和晶面上的台阶结构是该晶习形成的主要原因.动力学蒙特卡罗模拟表明,高能垒导致{0 11}晶面有最小的生长速度.</span> <br /> 2020年02月01 00:00 2020年02 169 179 1941966 <span>尹秋响<sup>1, 2</sup>,赵 迅<sup>1</sup>,崔平平<sup>1</sup>,张美景<sup>1, 2</sup>,谢 闯<sup>1, 2</sup>,鲍 颖<sup>1, 2</sup>,侯宝红<sup>1, 2</sup>,王静康<sup>1, 2</sup>,周 玲</span> <sup>1</sup> <br /> <span>回灌开启时间对地层沉降与应力应变的影响</span> <br /> /zrb/oa/darticle.aspx?type=view&id=202002010 <span> <span style="font-family: 方正楷体简体; font-size: 9pt;">在天津、上海等沿海地区基坑工程中,由于地下水位较高且含水层分布广泛,当基坑抗突涌稳定安全系数不足时,需对承压含水层减压抽水.根据有效应力原则,减压抽水可导致有效应力上升,加剧基坑外沉降.在基坑施工期间,可使用回灌作为有效的沉降控制措施来保护基坑周围的重要建筑物.工程实践表明,在长时间减压抽水后回灌,仅能保证沉降不再发展,很难使沉降完全恢复.针对此问题,采用三维流固耦合有限元模型,对比分析减压井和回灌井在先灌后抽、同灌同抽、先抽后灌</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">3</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">种方案下土体应力应变特征.研究表明,回灌井与减压井开启顺序对地表沉降影响显著,先抽后灌造成地表沉降最大,<a name="_Hlk3551448">沉降值与回灌前抽水时间呈正相关</a>.造成沉降差异的主要原因是上覆弱透水层在不同方案下应力路径不同,从而导致塑性压缩变形不同.在先抽后灌方案中,上覆弱透水层有效应力先升后降,受前期固结压力与回弹模量影响,<a name="_Hlk3551458">上覆弱透水层可产生较高的</a>压缩变形.因此,在实际工程中应尽量保证同抽同灌.同时,当抽水量恒定时,相邻弱透水层渗透系数也会改变土体竖向变形分布,下卧弱透水层渗透性越强,地表沉降越小,而上覆弱透水层的渗透性对地表沉降影响较小.</span> </span> <br /> 2020年02月01 00:00 2020年02 180 191 1958053 <span>郑 刚<sup>1</sup>,哈 达<sup>1</sup>,程雪松<sup>1</sup>,曾超峰<sup>2</sup>,曹剑然</span> <sup>1</sup> <br /> <span>碳化对水泥固化铅污染土物理力学特性的影响及其微观机理</span> <br /> /zrb/oa/darticle.aspx?type=view&id=202002011 <span> <span style="font-family: 方正楷体简体; font-size: 9pt;">水泥固化重金属污染土在服役过程中会受到周围环境的长期物理化学侵蚀,其中二氧化碳碳化作用是影响水泥材料耐久性的一个重要因素.为确保重金属污染场地二次开发利用的安全性,通过室内加速碳化试验研究了碳化作用对水泥固化铅污染土性能的影响规律.人工配制铅污染土,采用水泥固化后进行加速碳化试验,测试碳化后试样的碳化深度、含水率、密度、强度和孔隙溶液</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">pH</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">值等指标,分析碳化作用对固化土各物理力学特性的影响规律,并对比分析碳化与否时固化土的矿物成分和微观结构特征.试验结果表明,固化土的碳化深度与碳化时间平方根呈近似线性关系;碳化反应消耗一定量的水分,生成碳酸钙填充于孔隙,导致碳化后试样的含水率和孔隙率降低,干密度增加;碳化作用还导致孔隙溶液</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">pH</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">值从</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">11</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">~</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">12</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">降低到</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">8</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">~</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">9</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">;碳化后固化土的无侧限抗压强度和变形模量均得到增长,强度增加约</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">6</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">%</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">~</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">40</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">%</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,试样无侧限抗压强度与基质干密度近似线性相关,变形模量与无侧限抗压强度也呈近似线性关系,变形模量约为无侧限抗压强度的</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">75</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">~</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">100</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">倍.</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">TGA</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">XRD</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">和</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">SEM</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">试验从矿物成分变化和微观结构特征方面证实了碳化作用后水泥水化产物水化硅酸钙、钙矾石和氢氧化钙等向碳酸钙转化的现象,这也是固化土孔隙率降低和强度增加的主要原因.</span> </span> <br /> 2020年02月01 00:00 2020年02 192 200 1150923 <span>章定文<sup>1, 2</sup>,曹智国<sup>1, 2</sup>,张 涛<sup>3</sup>,刘松玉</span> <sup>1, 2</sup> <br /> <span>琼脂糖基两性离子聚合物合成及其反聚电解质行为研究</span> <br /> /zrb/oa/darticle.aspx?type=view&id=202002012 <span> <span style="font-family: 方正楷体简体; font-size: 9pt;">分子结构中含有甜菜碱基团的两性离子聚合物,由于独特的反聚电解质性质使其在药物释放、抗蛋白吸附、抗血栓材料等领域具有潜在的应用前景</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">. </span> <span style="font-family: 方正楷体简体; font-size: 9pt;">但传统两性离子聚合物的可降解性较差,致使其在生物医学领域中的应用受到一定限制</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">. </span> <span style="font-family: 方正楷体简体; font-size: 9pt;">本文以具有良好生物相容性及生物可降解性的琼脂糖为基本原料,开发了一种琼脂糖和</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">3</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">[N</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">N</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">二甲基</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">[2</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">2</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">甲基丙</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">2</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">烯酰氧基</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">乙基</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">]</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">铵</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">]</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">丙烷</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">1</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">磺酸内盐</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">SBMA</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">的接枝共聚物</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">agarose</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">g</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">PSBMA</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">. </span> <span style="font-family: 方正楷体简体; font-size: 9pt;">首先,通过琼脂糖与溴</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">异丁酰溴</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">BIBB</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">之间的酰胺化反应合成引发剂</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">agarose</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Br</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,探索了</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">BIBB</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">用量、反应时间等参数对</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">agarose</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Br</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">取代度的调控作用,结果发现随反应物中</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">BIBB</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">过量倍数的增加,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">agarose</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Br</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">的取代度</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">DS</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">逐渐增大</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">. </span> <span style="font-family: 方正楷体简体; font-size: 9pt;">在此基础上,以</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">agarose</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Br</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">为引发剂,通过</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">ATRP</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">反应,实现了</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">SBMA</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">在琼脂糖主链上的接枝聚合</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">. </span> <span style="font-family: 方正楷体简体; font-size: 9pt;">通过调节</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">SBMA</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">与</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">agarose</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Br</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">的投料比例,合成了一系列具有不同取代度及支链长度的</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">agarose</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">g</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">PSBMA</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,且实验结果表明支链的聚合度与投料理论值基本保持一致,相对分子质量分布较窄</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">1.03</span> <span style="font-family: 方正楷体简体; font-size: 9pt;"><</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">PDI</span> <span style="font-family: 方正楷体简体; font-size: 9pt;"><</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">1.30</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,接枝聚合的可控性强</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">. </span> <span style="font-family: 方正楷体简体; font-size: 9pt;">以</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">[<i>η</i>]</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">为目标参数,详细并系统地研究了</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">agarose</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">g</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">PSBMA</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">在不同</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">NaCl</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">浓度溶液中的反聚电解质行为,发现随</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">NaCl</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">溶液浓度的增加其</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">[</span> <i> <span style="font-family: Symbol; font-size: 9pt;">h</span> </i> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">]</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">也增大,且</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">agarose</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">g</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">PSBMA</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">的</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">[<i>η</i>]</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">符合</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Huggins</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Houwink</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">方程的规律,具有明显的反聚电解质行为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">. </span> <span style="font-family: 方正楷体简体; font-size: 9pt;">研究结果将为拓宽多糖及两性离子类聚合物结构设计及应用提供新的思路</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">.</span> </span> <br /> 2020年02月01 00:00 2020年02 201 206 817878 <span>姚芳莲<sup>1</sup>,郭 旗<sup>1</sup>,罗巧悦<sup>1</sup>,田 苗<sup>1</sup>,王进美<sup>1</sup>,胡 剑<sup>2</sup>,杨志伟<sup>2</sup>,李俊杰</span> <sup>1</sup> <br /> <span>硼氮共掺杂石墨烯量子点及对Hg<sup>2+</sup>的选择性检测</span> <br /> /zrb/oa/darticle.aspx?type=view&id=202002013 <span> <span style="font-family: 方正楷体简体; font-size: 9pt;">以柠檬酸、乙二胺和苯硼酸为原料,采用一步水热法制备了高荧光量子产率、长荧光寿命的硼氮共掺杂石墨烯量子点</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">B</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">N</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">GQDs</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">.通过透射电子显微镜</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">TEM</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">、傅里叶变换红外光谱仪</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">FT</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">IR</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">X</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">射线光电子能谱仪</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">XPS</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">、紫外</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">可见分光光度计</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">UV</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Vis</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">及荧光光谱仪</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">PL</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">对量子点进行了表征.结果表明,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">B</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">N</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">GQDs</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">粒径范围为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">1.46</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">~</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">3.5<span style="letter-spacing: 2pt;">4</span>nm</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,平均粒径为</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">2.34</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">±</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">0.50</span> <span style="letter-spacing: 2pt; font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">nm</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,具有明显的晶格条纹结构;表面官能团</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">—</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">OH</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">—</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">NH</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">和</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">—</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">BOH</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">的存在,有利于与金属离子结合从而实现对金属离子的检测;在</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">pH</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">=</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">5.0</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">~</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">10.0</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">和</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">NaCl</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">浓度</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">0</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">~</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">1.<span style="letter-spacing: 2pt;">0</span>mol/L</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">的酸碱盐环境下,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">B</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">N</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">GQDs</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">具有优异的荧光稳定性.由于</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">B</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">N</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">GQD</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">与金属离子具有结合作用,因此它被用作检测金属离子的荧光探针.考察了</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">15</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">种金属离子</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">K</span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Na</span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Ba<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Ni<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Zn<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Pb<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Li</span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Cu<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Ag</span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Mn<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Fe<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Mg<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Fe<sup>3</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Ca<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">和</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Hg<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">对</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">B</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">N</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">GQDs</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">荧光强度的影响,发现仅</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Mg<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Fe<sup>3</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Ca<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">和</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Hg<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">对其荧光有猝灭作用.考虑到</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Hg<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">是重要的有毒污染物,因此灵敏、选择性地检测</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Hg<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">对人体健康和环境保护至关重要.在单一汞离子体系中,其线性范围为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">2.0</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">~</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">20.<span style="letter-spacing: 2pt;">0</span>μmol/L</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,检测限为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">0.0<span style="letter-spacing: 2pt;">5</span>μmol/L</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">;在复杂体系</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Mg<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Fe<sup>3</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">、</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Ca<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">和</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Hg<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">中,采用掩蔽剂</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">NaF</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">能够实现对</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Hg<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">浓度的准确测定,其检测误差范围为</span> <span style="font-family: 方正书宋简体; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">4.432</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">%</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">~</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">2.600</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">%</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">.</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">B</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">N</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">GQDs</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">有望在多金属离子响应体系中实现对</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Hg<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">的快速检测.此外,探究了</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Hg<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">对</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">B</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">N</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">GQDs</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">荧光的猝灭机理,当加入</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">Hg<sup>2</sup></span> <sup> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">+</span> </sup> <span style="font-family: 方正楷体简体; font-size: 9pt;">后,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">B</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">,</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">N</span> <span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">-</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">GQDs</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">的荧光寿命从原来的</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">12.8<span style="letter-spacing: 2pt;">6</span>ns</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">缩短为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">11.3<span style="letter-spacing: 2pt;">4</span>ns</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,符合动态猝灭机理.</span> </span> <br /> 2020年02月01 00:00 2020年02 207 213 1075564 <span>袁才登<sup>1, 2</sup>,杨盼星<sup>1</sup>,苏 洁<sup>1</sup>,郭睿威<sup>1, 2</sup>,姚芳莲</span> <sup>1, 2</sup> <br /> <span>PTA 干燥机搅拌系统有限元分析方法研究</span> <br /> /zrb/oa/darticle.aspx?type=view&id=202002014 <span> <span style="font-family: 方正楷体简体; font-size: 9pt;">针对某新型卧式回转</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">PTA</span> <span style="font-family: 宋体; font-size: 9pt;">(</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">精对苯二甲酸</span> <span style="font-family: 宋体; font-size: 9pt;">)</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">干燥机的搅拌系统出现的断裂问题,提出一种新的有限元分析方法,即时间节点法,在搅拌系统一个转动周期内均匀地取多个时间点,对每一个时间点下的搅拌系统进行静力学分析模拟,然后将模拟得到的结果进行统计分析,绘制出变化曲线,描绘搅拌系统在转动过程中的变化过程</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">.</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">利用</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">ANASYS workbench</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">软件对时间节点法进行验证并对搅拌系统进行研究</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">.</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">研究结果表明,取</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">8</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">个时间节点来描述搅拌系统在一个周期内的变化过程最为合理,搅拌系统运转过程中在空心轴与实心轴交接部位出现最大应力,其值为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">118.5<span style="letter-spacing: 2pt;">6</span>MPa</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,在螺带的最前端出现最大形变,其值为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">16.03<span style="letter-spacing: 2pt;">5</span>mm</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,当料柱质量为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">1<span style="letter-spacing: 2pt;">2</span>t</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">时,疲劳寿命为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">3.5</span> <span style="letter-spacing: 2pt; font-family: &quot;Times New Roman&quot;,serif; font-size: 9pt;">4</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">a</span> <span style="font-family: 方正书宋简体; font-size: 9pt;">,</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">模拟分析得到的疲劳寿命与搅拌系统发生断裂的时间偏差为</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">5.93</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">%</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">,且模拟结果中出现疲劳断裂的位置与搅拌系统发生断裂的位置相同,由此验证了时间节点法的准确性</span> <span style="letter-spacing: -2pt; font-family: 方正书宋简体; font-size: 9pt;">.</span> <span style="font-family: 方正楷体简体; font-size: 9pt;">研究内容为动设备的受力分析提供了新的方法和思路</span> <span style="font-family: &quot;Time New Roman&quot;,serif; font-size: 9pt;">.</span> </span> <br /> 2020年02月01 00:00 2020年02 214 220 1572455 <span>王晓静,张照汶,王锡尧,刘 瑞</span> <br />