基于巯基磷酸和巯基环糊精双修饰纳米金的修饰电极测定微囊藻毒素的研究

为了快速灵敏的检测微囊藻毒素（MC）的含量,本研究根据微囊藻毒素LR亚型（MC-LR）的结构特点对纳米金进行了巯基β-环糊精和巯基磷酸的双修饰,建立了一种基于双修饰纳米金材料的微分脉冲伏安电化学分析方法检测MC。结果表明双修饰的纳米金对MC具有良好的吸附性能,其吸附量达到2.125μg/m L,静态分布系数为5.67。利用电聚合中性红修饰的玻碳电极表面正电荷吸附双修饰纳米金材料制备电化学传感器,测定MC,结果表明该电极对MC-LR的线性范围为26 nmol/L²13μmol/L,检测限为（3σ/S）19 nmol/L,且具有良好的抗干扰能力。      

应用激光共聚焦研究特低渗透储层微观剩余油分布——以榆树林油田扶杨油层为例

目前对于特低渗透储层剩余油的研究,多数采用核磁共振方法监测剩余油饱和度,对微观剩余油分布位置及定量分析的较少。为了确定扶杨储层不同开发阶段微观剩余油分布类型和状态,采用激光共聚焦以及光刻玻璃模型微观可视化驱替实验方法研究扶杨储层微观剩余油分布,采用光刻玻璃模型微观可视化驱替实验研究扶杨油层剩余油分布类型及成因,采用激光共聚焦扫描显微镜技术研究扶杨储层天然岩心不同开发阶段各类剩余油分布数量,并研究了不同挖潜措施对各类微观剩余油的动用效果。结果表明,扶杨储层微观剩余油分布以簇状为主,占60%以上,随着岩心含水率的升高,部分簇状剩余油被注入水驱替,变为分布更加零散的柱状、油滴状、膜状和盲端状。改变驱替方向、周期性注入方式使簇状和柱状剩余油得到动用;增大驱替压差可以使簇状和油滴状剩余油得到动用;增大驱替液黏度能够使这五种类型微观剩余油得到有效动用。     

Fe-Ni-P-B共晶合金的深过冷凝固组织演化

采用玻璃熔覆法使Fe-Ni-P-B共晶合金在不同过冷度条件下凝固,研究了其组织随过冷度的演化规律.结果表明,随着过冷度的增加,凝固组织形态逐渐从棒状规则共晶向不规则的粒状共晶组织转化.当T＜35 K时,棒状规则共晶组织随过冷度增加而逐渐细化;当35 K＜ T＜150 K时,凝固组织由团状非规则共晶与棒状规则共晶构成,且随着过冷度增加非规则共晶逐渐增多,规则共晶组织减少,共晶间距增大;当T＞150K时,获得完全非规则共晶组织.应用Jackson-Hunt共晶生长模型和枝晶熔断理论,对Fe-Ni-P-B共晶合金凝固组织形成机制进行了分析讨论.     

Statistical analysis on strain-rate effects during serrations in a Zr-based bulk metallic glass

By means of statistical analysis, the deformation mechanisms taking place in elastic loading and plastic shearing stages during serrated flows on the stress-strain curves for bulk metallic glasses were studied comprehensively.Normalized serration number presented a linear increasing tendency with the decrease of applied strain rates due to the reduction of free volumes.An excellent plastic deformation was illustrated from the influences of structure arrangement with activation energy.By using mean-field theory (MFT), maximum elastic-energy density at different strain rates could be predicted by MFT besides maximum stress drops during serrations.These results were helpful for understanding the serrated flow behavior or designing decent schemes to improve the plasticity of bulk metallic glasses at room temperature.     

论光伏玻璃的发展潜力

本文介绍了光伏玻璃的定义、用途及特点,分析论述了其发展潜力。     

含铅、锌、锶玻璃样品中B2O3的测定方法研究

探索了对含铅、锌、锶的玻璃样品中B2O3质量分数的测定方法,详细介绍了试验操作步骤及反应原理,并且对3种玻璃进行了重复性验证以及回收率试验。试验结果表明,该测定方法可有效消除玻璃中的铅、锶、锌等元素干扰,能显著提高测量的准确度和重复性。试验标准偏差均低于1%,加标回收率达到98%以上。     

有机硅交联聚合物的分子模拟

由正硅酸乙酯(TEOS)和甲基三乙氧基硅烷(MTEOS)出发,先构建了聚合物的单体模型,再构建单链,最后通过手动建立化学键的方法构建了有机硅树脂交联体系的网络模型,并且验证了该模型的有效性.通过比较选择了适合有机硅交联体系的非键作用力和聚合度,再通过模拟有机硅交联体系的密度与温度的关系图、比体积与温度的关系图预测了有机硅树脂交联体系的玻璃化转变温度(Tg).     

A robust design to reduce variability in glass container inspection

This article presents research efforts made to assist a Fortune 500 glassmaker in reducing the variability of its automated visual inspection systems in assessing product quality. Through interviewing line workers, engineers and managers, and direct observations of the inspection process possible causes leading to large variability observed in the inspection process were identified. Responding to these findings, solutions related to equipment setup, job changes, and operational procedures were suggested in order to minimize the inspection process variations as well as to improve the replicability of the inspection stations. Additionally, a unique statistical experiment was conducted to analyze how three factors (namely, operator, defect size, and threshold value used) would affect the mean of the defective ratio. A robust design aiming at controlling these variations was then given to optimize the system's performance.     

Environmental fatigue behavior of non‐crimp,E‐glass fiber reinforced polyester composites for marine applications

This study is aimed to find the fatigue behavior of Glass Reinforced Plastics, a material which is a widely preferred material for small marine crafts, as well as several other applications. The type of composite tested is hand‐laid E‐glass non‐crimp reinforcements with an polyester resin matrix. The specimens were produced in two standard thicknesses and with these material directions and were tested both under atmospheric and simulated seawater environments for fatigue. It was seen that the results of fatigue lifetime obtained by testing the material in seawater is much lower than the results obtained from testing similar specimens under atmospheric conditions. However, the stress curves indicate the same slope, suggesting that the fatigue failure mechanism of both testing conditions is the same and the fiber‐related factors dominate. It was found that the thickness and material direction did not have a significant effect on the fatigue behavior of the material.