柘林水库泄水放空洞台车式启闭机行走装置改造设计

分析柘林水库泄水放空洞台车式启闭机手动行走装置运行中存在的问题,提出改造设计思路,并进行主要参数计算和设备选型.     

一种STN-LCD驱动电路的可靠性分析与设计

文章主要对一种常规的小规模STN-LCD驱动电路在使用过程中出现的可靠性失效问题进行分析和讨论,对在干扰环境中工作的集成电路的芯片级的抗干扰和可靠性设计提出了一些建议及总结。在实际分析过程中,采用模拟再现实际使用环境进行实验等方式,对电路出现的失效现象进行再现和定位。通过对失效结构的设计线路和失效机理的分析,对具体引起失效的上电复位结构和通信端口结构进行了设计改进。目前,经过实际流片和测试,改进方案通过了验证。     

超临界CO2水平细微管内层流流动与换热的数值模拟

对超临界CO2在水平细微管内层流流动与换热进行了数值模拟.给出了冷却和加热条件下,细微管(d＜1.0 mm)内有代表性的速度、温度剖面,以及Nusselt数随流体温度的变化.研究表明超临界CO2在水平细微管内层流流动时,由于流体热物性随温度剧烈变化,浮升力的影响非常显著,加强了管内换热;且由于流体强变物性特点,只要流体和壁面存在温差,速度及无量纲温度分布就不断变化,充分发展流不可能达到.研究结果对超临界CO2高效紧凑式换热器的设计与优化有重要的意义.     

输电线路暂态信号检测方法比较分析

输电线路发生故障产生的暂态行波是一个突变的、具有奇异性的信号,正确检测出信号的突变点即暂态行波波头是利用行波进行保护和测距的核心。对电网中断路器操作、电容投切、一次电弧、单相短路、雷击等产生的暂态信号进行了仿真．并分别利用小波变换模极大值、小波变换Lipischitz a、小波变换能量谱检测行波波头进行比较分析。EMTP仿真分析表明,三种方法均有提取行波特征,且采用小波能量谱检测输电线路暂态行波波头到达的时刻最精确,故障定位精度最高。     

钯在氢同位素分离和纯化工艺中的应用

在迄今所知的金属-氢体系中，钯氢体系的同位素效应最强，因此，钯被广泛用于氢同位素处理工艺中。文章简述了钯氢体系的同位素效应，综述了钯及其合金在氢同位素分离和纯化工艺中的主要应用及其发展。     

V-5Cr-5Ti在AlCl3-EMIC离子液体中的阳极活化及表面铝沉积

钒合金表面获得性能优良的Al涂层是在其表面制备V-Al/Al₂O₃阻氚涂层的重要基础。针对聚变堆候选结构材料V-5Cr-5Ti,本文采用电化学方法研究了其在AlCl₃-EMIC（摩尔比为2∶1）离子液体中的阳极行为,比较分析了恒电位极化模式下不同电位、极化时间对表面阳极活化的影响。在此基础上,采用恒电流沉积（16 mA/cm²）模式研究了阳极活化电位、沉积时间和温度对镀层的影响。结果表明：阳极氧化电流在1.25 V（参比Al的电位）电位时出现峰值,在该电位下极化15 min,V-5Cr-5Ti基体可获得腐蚀均匀的可再生表面。16 mA/cm²下铝沉积,活化表面为（111）和（200）方向择优生长的纯铝涂层,与基体结合良好,室温下沉积75 min,可获得20 μm厚性能良好的铝涂层。     

Fortification of Bread with L-Lysine HCI: Losses Due to Baking Process

A Brasilian water bread was formulated with wheat flour (100%), salt (2%), yeast (5%), water (60%), fungal amylase (130 SKB/100g wheat flour), ascorbic acid (0.02%), and polysorbate-60 (1%). To the formulation was added Lysine.HCl at levels of 0.1, 0.2, 0.3, 0.4, and 0.5% as related to wheat flour in the formulation. The breads (fortified and control) were baked at 220°C for 20 min. The retention of lysine was estimated by measuring the free Lysine·HCl in bread with FDNB. A regression equation was developed relating the input and retention of lysine, which indicated a loss or destruction of 11.3% of added lysine during baking process.     

Effect of pretreatment with salt and sucrose on the quality and stability of dehydrated cauliflower

Dehydrated cauliflower was prepared by soaking the blanched pieces in solutions of different concentrations of common salt and sucrose (cane sugar), alone and in combination, prior to drying in a cabinet drier and evaluated for sensory, rehydration, storage, microbiological, histological and sorption characteristics. While sucrose alone produced considerable improvement, salt supplemented its effect. The optimum treatment was soaking in 3% salt and 6% sucrose for 12–16h at 4°C it markedly reduced shrinkage and improved rehydration without affecting palatability. It was necessary to boil the soak solution for 3 min and cool prior to soaking to reduce microbial contamination. The treatment increased ascorbic acid loss by 8%. Monolayer moisture content calculated from BET equation was 6.5% (moisture-free) basis for treated and 5.3% for untreated. The treatment increased the shelf-life of the product from 3 to 12 months at ambient temperature when packaged in paper-foil-polythene laminate.     

人工关节材料的研究进展

高可靠性、耐磨人工关节材料的研究开发对人工关节的临床应用极为重要.简述了人工关节的分类,对Al2O3与ZrO2人工关节的研究现状、可靠性和耐磨机制进行了综述,对ZrO2的增韧机理和稳定剂CeO2进行了讨论,最后对Ce-TZP/Al2O3作为一种新的人工关节材料在临床上的应用进行了展望.