络合剂对胶束三元络合物显色体系的影响1──锆(Ⅳ)-m-NPF-CTMAB 显色体系及其应用

在０．２４～０．４２ｍｏｌ／ＬＨＣｌ介质中，研究了１７种络合剂对锆（Ⅳ）－ｍ－ＮＰＦ－ＣＴＭＡＢ显色反应的影响。除乳酸、甘露醇、α－羟基异丁酸、氧代戊二酸和柠檬酸外，其余络合剂都使体系的吸光度降低。有乳酸和甘露醇存在下，有色络合物的表观摩尔吸光系数为１．３０×１０５Ｌ·ｍｏｌ－１·ｃｍ－１。Ｚｒ（Ⅳ）在０～１０μｇ／２５ｍＬ符合比尔定律。方法用于铝合金中微量锆的测定，结果满意。     

交流电机软起动

介绍了用ＮＥ５５５控制固态继电器，实现交流电机软起动的装置，以及电流闭环控制设计。实验证明：该方案具有良好的软起动性能，且造价低。     

一种新型的大功率电镀电源

国内生产的１０００Ａ以上的晶闸管与同容量二极管的价格相近，采用晶闸管研制出一种整流和控制结合为一体的大功率电镀电源，打破了传统的整流和控制分离而使用两种半导体器件及两种电磁部件的方法．这种新型的大功率电镀电源的特点是造价低，输出电流能力强，可靠性高，控制特性好且能量损失小．     

活性炭共吸附现象对有机蒸气穿透容量的影响

在空气避有机蒸气的气相色谱分析方法研究中，为获得可靠的采样效果，探讨了活性炭对共存有机蒸气的共吸附与穿透容量的关系，试验了四种有机蒸气共存时和组分的有采样效率。结果表明，共吸附使所有共存有机蒸气的穿透容量下降，共吸附物质愈多，穿透窝量下降愈严重。对二种和四种有机蒸气的共吸附，使丙酮的穿透容量下降２１．９％和４１．７％，四组分共存时，丙酮，丁酮，环已酮、甲苯的穿透窝量分别为５．６、５．０、９．７、１     

闪烁体部分性能的测试方法

本文介绍了闪烁体相对光输出，相对能量转换效率，固有幅度分辨率，探测效率测试法及其温度效应。     

Analysis,simulation and verification of a bipolar current source power resonant inverter

A high‐frequency bipolar current source resonant inverter introduced in this paper has dramatic zero‐voltage‐switching (ZVS) characteristic. The analytic expressions of the resonant voltage and current are given. It indicates that the resonant waveform is composed of two parts, i.e. the oscillatory component and the stationary component. In special cases, the resonant waveform degenerates into the mono‐frequency component, as presents the graceful sinusoidal wave with very low total harmonic distortion (THD) value. Based on the closed‐form voltage and current, the component stresses on reactive elements are obtained. The impact of different component values and operating frequencies on ZVS feature is also discussed. It should be noted that the ZVS merit may be lost if the components are carelessly selected. The validity of the theoretical analysis has been proven with Pspice simulations and experimental results. Copyright © 2004 John Wiley Sons, Ltd.     

电子冷冻加工的特点与应用研究

针对采用热电制冷的冷冻加工方式的特点与应用进行了研究,对于特殊工件的加工提出了一种全新的加工方式,它改革了传统的工件夹持方法,为超小、超薄、异形、低强度脆性材料的工件的加工提供了一种可能,同时电子冷冻加工使低温加工成为现实,可解决一般常用材料及某些特殊材料的加工问题,特别适宜于薄片件,韧、粘性材料的加工,结构简单,温度可调,成本低,无粉尘和气味,可应用于各行各业的机械加工中.     

A New Immune Genetic Algorithm and Its Application in Redundant Manipulator Path Planning

In this paper, first the immune system is analyzed in a relatively deeper and all‐sided point of view reflecting the fresh research in biology. Second, based on the previous statements, a new optimization method, the immune genetic algorithm (IGA), is presented by simulating the behavior of the biological immune system and is proved to converge to the global optimum with probability 1. Third, a new method on the multi‐object optimization that is transformed into a single‐object one is proposed based on the joints' best compliance in the redundant robot path planning using IGA. Last, the experiment results show that the method of this article behaves more successfully. © 2004 Wiley Periodicals, Inc.     

硫酸高铈与对二甲苯反应的动力学研究

本工作测定了不同温度下硫酸高铈与对二甲苯反应的速率常数及表观活化能Ｅａ＝ １１１．５ｋＪ·ｍ ｏｌ－ １。在动力学测定的的基础上确定了此反应的速率方程为ｄ［ＰＴＡＬ］／ｄｔ＝ ｋ［ＰＸ］［Ｃｅ（ＩＶ）］