HR3C钢管高温服役脆化行为特征及预防泄漏措施

HR3C钢管因具有优良的抗蒸汽氧化性能广泛应用于566、600及620 ℃等级超/超超临界机组,但是其在高温时效过程中表现出明显的脆化现象,严重影响机组安全稳定运行。结合脆化失效案例的典型特征对HR3C钢管在高温时效和服役态下的脆化现象、脆化机理、脆化防治进行了系统的分析,提出了针对脆化HR3C钢管泄漏的预防性措施。最后指出了HR3C钢的应用困境和面临的挑战。     

对J.E.M效应导致雷达跟踪精度超差的分析

喷气式飞机的Ｊ．Ｅ．Ｍ（ＪｅｔＥｎｇｉｎｅＭｏｄｕｌａｔｉｏｎ，即喷气式飞机进气道中喷气发动机旋转叶片对雷达回波的调制）效应，对飞机机身散射的有用回波信号是一个大的干扰，它对雷达引信、制导系统的导引头以及跟踪雷达的工作都会造成非常大的危害。本文对Ｊ．Ｅ．Ｍ效应的影响使雷达跟踪精度严重超差的物理机理进行了探讨，指出了为减小Ｊ．Ｅ．Ｍ效应使雷达跟踪精度满足要求的条件。     

Distinguished Scientific Awards for an Early Career Contribution to Psychology: David M. Buss.

The Early Career Awards, given for the first time in 1974, recognize the large number of excellent young psychologists. Recipients of this award may not have held a PhD for more than nine years. For purposes of this award, psychology has been divided into nine areas: human learning and cognition, psychopathology, physiological animal learning and behavior, personality, developmental social sensation and perception, and applied research. Three areas are considered each year, with areas rotated in three-year cycles. The areas considered in 1988 were animal learning, behavior, and ethology; personality; and developmental. This year's winner in the area of personality is David M. Buss. Buss is cited for the theoretical breadth and empirical depth of his work, which are exemplars of the personological tradition in psychology and for his act-frequency approach to the analysis of personality dispositions, which, by combining a summary interpretation of traits with recent advances in cognitive psychology, has yielded a steadily developing agenda of research in personality and a fresh perspective on central issues of the field. Along with the citation, a biography and selected bibliography of Buss's published works are presented. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

H62黄铜超塑性压缩变形后的组织与性能

通过对Ｈ６２黄铜超塑性压缩变形后的试样进行金相组织分析和硬度试验，以选择最佳的超塑性压缩变形参数。     

同步整流在WK283R3S-33M中的应用

介绍了WK283R3S-33M电源中实现的主要技术，并对同步整流、变压器磁复位及去磁网络的工作原理进行分析。并给出了相关试验结果。     

粉末冶金结构零件的材料与质量

论述了:(1)影响粉末冶金结构零件质量的两大因素:原材料和成形工序;(2)发展粉末冶金结构零件需要纠正的几种错误认识;(3)粉末冶金材料的特点。     

一种单片集成的CMOS数/模接口电路的设计

介绍了一种单片集成的数模接口电路。它主要由两个8位D/A转换器、8个比较器通道和片上带隙基准源组成。设计中,采用了一种规则的全NMOS管构成的M-2M梯形电路,以及本文提出的电流-电压转换电路。电路采用1.2μm双层多晶双层金属N阱CMOS工艺实现,芯片面积3.5mm×2.7mm。系统采用5V双电源,正常工作时功耗约为500mW。D/A转换器的有效工作位为7位,实现了确定的-3V到+3.5V的输出幅度,满摆幅输出建立时间小于1μs。比较器通道的传输延迟小于10ns。     

Evaluation of magnetic hyperfine field distributions from Mössbauer spectra of disordered alloys and metallic glasses

A simple computer program is described to evaluate magnetic field distributions from complex Mössbauer spectra of magnetic alloys. The use of this program for test cases of Vitrovac 4040 amorphous sample and a simulated spectrum of two gaussian peaks is discussed.     

在束穆斯堡尔实验装置

介绍了最近在兰州重离子加速器上建立的一台在束穆斯堡尔实验装置，讨论了在束穆斯堡尔实验技术。