深循环用铅钙合金板栅极板的固化

国内电源界最具影响力的3家专业刊物从2003年下半年至今相继介绍了铅镉合金用于深循环使用的优势。但铅镉不是惟一的合金,镉是致癌物,在生物或植物中有蓄积性危害,应以不宣传、不使用为宜。笔者认为铅钙合金只要适当提高锡含量,采用有针对性的特定固化工艺,改善板栅—活性物质界面的导电性,提高活性物质与板栅的粘附力,完全可以满足深循环长寿命的需要。     

配网无功补偿及补偿效益分析

根据我国实际配网情况，阐述了低压配网电容无功补偿在改善电能质量、降损节能，提高供电设备的供电能力及减少用户电费支出的作用和意义，并对无功补偿效益进行了分析。     

旋风分离器内颗粒轨迹的数值模拟

采用数值模拟的方法研究旋风分离器内的颗粒运动:对单相流场采用湍流各向异性的雷诺应力模型,对气、固两相流场采用相间耦合的随机轨道模型;通过描述颗粒的运动轨迹,揭示了颗粒在旋风分离器中运动的物理机制.结果表明:颗粒的运动轨迹比较复杂,且带有很大的随机性;尤其是小粒径颗粒,受气流湍动影响显著,即使是粒径、入射位置相同,其运动轨迹也各不相同,最终的位置也不同;小粒径颗粒更容易受二次涡流影响,从而降低分离器的效率;另外,还模拟出了上灰环、排气管短路流及排尘口返混等影响分离效率的几种现象,为进一步研究旋风分离器的分离机理理论及实验研究打下基础.     

低渣比冶炼锰硅合金的条件与操作要点

论述了低渣比冶炼锰硅合金的条件和操作要点，阐明了炉料中Al2O3与电炉工艺参数、焦炭粒度之间的相互关系及其对电耗等指标的影响。     

低热值煤气燃气轮机联合循环发电在钢铁厂的应用

燃气轮机联合循环发电效率比常规电厂高10个百分点左右。适合钢铁厂低热值煤气燃气轮机有单筒燃烧器和多筒燃烧器二种类型。容量应按钢铁厂富余煤气量呈正态分布的规律计算确定。文章还介绍了轴制．煤气预处理、电网联网等特殊问题。50MW左右的机组已有国产化的实例。     

万向联轴器法兰叉架的法兰强度计算及厚度确定

分析了万向联轴器法兰叉架的法兰破坏的原因 ,对法兰不同轴向截面进行受力分析 ,提出法兰厚度的计算公式。用这个计算公式可以对承担任何公称扭矩的任何轴向截面的法兰叉架的法兰进行强度计算及厚度确定。     

金属粉末温压成形的数值模拟研究

本文借助MSC公司的Marc有限元分析软件对铁粉温压成形过程进行了数值模拟。通过采用基于总体拉格朗日方法的热 机耦合分析,得到了铁粉温压成形过程中材料的几何形变、应力场、密度分布等数据,为金属粉末温压工艺参数的优化设计提供了理论依据。     

Interactions Between Study Task, Study Time, and the Low-Frequency Hit Rate Advantage in Recognition Memory.

In studies of episodic recognition memory, low-frequency words (LF) have higher hit rates (HR) and lower false alarm rates (FAR) than do high-frequency words (HF), which is known as the mirror pattern. A few findings have suggested that requiring a task at study may reduce or eliminate the LF-HR advantage without altering the LF-FAR effect. Other studies have suggested that the size of the LF-HR advantage interacts with study time. To explore such findings more thoroughly and relate them to theory, the authors conducted 5 experiments, varying study time and study task. The full mirror pattern was found only in 2 cases: the standard condition requiring study for a later memory test and a condition requiring a judgment about unusual letters. The authors explain their findings in terms of the encoding of distinctive features and discuss the implications for current theories of recognition memory and the word frequency effect. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Optical modes for BiNem® LCDs

Abstract— We report on theoretical simulations and measurements of the optics of BiNem® displays, taking into account not only the luminance at normal incidence, but contrast ratio and color shift over the viewing hemisphere as well. Transmissive and reflective BiNem® modes were optimized differently, emphasizing contrast in transmission and paperlike, white appearance in reflection.     

Theory experiment comparison of the electron backscattering factor from solids at low electron energy (250-5,000 eV)

The electron backscattering factor was measured from 24 different elements at low primary beam energy (250-5,000 eV). The results were compared with Monte Carlo simulations from a variety of freely available programs and an in-house developed program. The results suggest that a thin film of oxide can modify the backscattering factor at low primary energy. In addition, a number of problems have been identified with the freely available programs.