Rapid analysis of polymer homologues and additives with SFE/SFC-MS coupling

A rapid and easy analysis method for polymers is presented. The method involves sample preparation by SFE, separation of the extracted compounds by SFC and simultaneous quantitative detection by FID, as well as identification of unknowns by MS. The applications illustrate how structural research work and routine polymer analysis can be done with this time saving method.     

异构云DCN中绿色虚拟算法设计

为进一步提升异构云数据中心网络(DCN)动态管理的科学性,在总结当前主流研究局限性的基础上构思一种基于全局相对最优化的绿色虚拟算法.算法综合考虑虚拟机迁移过程中可能涉及到的诸多客观因素,通过科学地规划时间门限、主机筛选策略、以及精度比较机制对虚拟机实施高效的迁移.数据考察表明,所部署的算法不仅可快速精确地物色到最适宜的...     

再生塑料内污染物迁移的有限元分析

建立计算仿真模型,该模型可用来预测再生塑料内污染物向液体产品(如食品)的迁移.该仿真模型的建立是基于有限元方法,可分析多层结构中的迁移.该项工作对于再生塑料尤其是有低阻隔性的聚烯烃在食品包装上的应用具有潜在意义.     

The Migration of Multi-tier E-commerce Applications to an Enterprise Java Environment

As technology evolves, many organizations face the problem of migrating legacy applications from one technology base to another. We report on a case study involving the migration of legacy code into the IBM® WebSphere® Commerce Suite product. Specifically, we focus on the problem of migrating applications that use traditional database access techniques to applications using the Enterprise JavaBean (EJB) programming model. Our results include a practical methodology that facilitates such migration, as well as a tool that supports this methodology. The tool has been released on IBM's alphaWorks site.     

PWB设计制造工艺和基材对耐CAF影响的评估

概述了CAF机理,各种标准基材,其它PWB基材和新型非双氰胺FR-4基材的电化学迁移或耐CAF的温度-湿度-偏压测试和数据分析方法。     

模型正演技术在叠前深度偏移中的应用

川西龙门山前缘构造非常复杂,逆掩推覆构造带构造形变强烈,构造幅度大,地层倾角陡,断块发育,地震波场复杂,速度横向变化大,常规叠后时间偏移处理成像效果较差.利用已有地震资料解释成果,建立地质模型进行射线追踪正演模拟分析,从而指导叠前深度偏移初始速度模型的建立,达到了复杂地表下复杂构造精确成像的目的.事实证明,这种将模型正演应用于叠前深度偏移处理成像的方法对于提高地震资料处理的成像质量具有非常重要的作用.     

用油气运移痕迹的统计结果确定仓储层厚度--以东营凹陷为例

在对东营凹陷网毯式油气成藏体系结构进行研究的基础上，针对其中、东部的特殊地质情况，对仓储层进行了精细划分。以钻井油气显示和试油数据为依据，研究了仓储层中的油气运移规律，提出了仓储层厚度的界定方法，并指出厚度是影响仓储质量的关键因素，只有在构成仓储层的砂砾岩体达到一定厚度时才能成为有效仓储层。仓储层厚度越大的地方，越有利于油气的运移和聚集成藏。同时在仓储层中显示油气成藏和有油气运移痕迹所要求的砂砾岩体厚度是相近的，而与无油气运移痕迹的砂砾岩体厚度有明显的差别。并且随着埋藏深度的增加，要求作为仓储层的砂砾岩体厚度也随之增大。因此，可以通过计算仓储层厚度来评价仓储层的质量。该方法在实际应用中简便可行，对于评价类似地区的网毯式油气成藏体系仓储层的仓储质量有借鉴作用。     

济阳坳陷地层油气藏油气运移动力与方式探讨

油气运移研究相对不足是目前制约济阳坳陷地层油气藏勘探的关键因素之一。本文依据油气成藏动力学理论,运用流体包裹体分析技术、油气运移物理模拟实验和地质统计学方法,对地层油气藏油气运聚动力与方式进行了探讨。研究认为,济阳坳陷地层油气藏油气运移动力早期以流体异常压力为主,后期逐渐过渡到以浮力为主;流体异常压力推动着含烃流体向外运移,浮力因输导层产状变化而具有一定的局限性;"高压临时仓储"的存在增加了远距离地层圈闭的成藏几率;盆缘流体异常压力值和地层水矿化度值突进方向与盆缘鼻状构造、坡折带展布方向一致,为油气运移的主要汇聚方向;流体异常压力的形成与发育特点决定了油气运移方式以幕式为主,也使济阳坳陷横向上发育多种地层油藏类型、纵向上发育多套含油层系。     

Edible Coatings to Inhibit Lipid Migration in a Confectionery Product

Coatings containing hydrocolloids and sweetners were tested for lipid barrier and sensory properties, adhesion to chocolate, viscosity, and a_w. A coating containing high methoxyl pectin, acacia gum, high fructose corn syrup, dextrose, fructose, and sucrose was most effective. Coatings (0.5 mm thick, a_w 0.5) showed no detectable oil migration after 47 days at 30 ± l°C, compared to 11.5 mg/cm² trilinolein equivalents migration in 1 day at 21 ± 2°C. Coatings (0.5 mm thick) were applied between chocolate and peanut butter and tested for sensory characteristics. Except for the color of the coating, no significant difference occurred in overall preference compared to control (no coating) samples.