有限转角无刷力矩电动机位置伺服系统的电流控制

提出了有限转角无刷力矩电动机 (LABLTM)位置伺服系统电流控制策略 ,给出了实施方法 ,进行了开关管频率特性的分析。该方法可实现在不同误差时自动调节电动机电流 ,进而控制输出转矩 ,并具有稳态精度高、动态响应快等特点。     

P、V操作的新探讨

P、V操作的概念以及使用在操作系统中非常重要、这里从一些新颖的角度来分析P、V操作，用P、V操作来实现进程的同步与互斥以及一种简单易行的逻辑关系则可以解决P操作嵌套时的执行次序。     

统计复用信道的数字用户环路复用设备

将信道传输容量动态分配技术应用于数字用户环路复用设备中，可用效地解决复用设备线路复用率和话音传输质量之间的矛盾，从而使复用设备具有最佳的传输效果。本文介绍了一种性能优良的统计复用信道的数字用户环路复用设备。     

V型尾门在河工模型试验中的应用

尾门是河工模型中常见的装置,也是水位控制的关键设备之一.该文作者根据多年的经验,研制了一种新式尾门--V型尾门.该尾门具有调节精度高、稳定性好、操作方便等优点.并在多个模型中应用,取得了良好的控制效果.文章介绍了V型尾门的制作要点,并结合试验数据论述具体应用效果.     

U(Ⅳ)-U(Ⅵ)同位素交换反应动力学研究 Ⅰ.Fe~(2+)对U(Ⅳ)-U(Ⅵ)同位素交换反应的催化作用

一、前言由于U(IV)-U(VI)同位素交换体系具有相当大的同位素效应和很好的稳定性,并且容易实现两相回流,这对于分离U同位素的工业应用都是十分有利的。但是,U(IV)-U(VI)同位素交换反应速度非常慢,常温下H~+浓度为1.0—4.0 mol/l时,速度常数为1.0×10~(-4)l~2/mol·s。因此要用U(IV)-U(VI)交换体系浓缩铀同位素,必须研究U(IV)-U(VI)交换反应动力学,找到加快交换反应的方法。     

Recent Progress of HT-7U Superconducting Tokamak

HT-7U is a superconducting tokamak. which is being constructed in Institute of Plasma Physics, Chinese Academy of Sciences. The mission of the HT-7U project is to develop a scientific and engineering basis of the steady state operation of advanced tokamak.The engineering design of the device has been optimized. The R&D program is going on. Short samples of the conductor and a CS model coil were tested. All the TF and PF coils will be manufactured and tested in Institute of Plasma Physics. Therefore, a 600-meter long jacketing line for cable-in-conduit conductors along with two winding machines, a set of VPI equipment and a test facility for the TF and PF coils are ready in ASIPP now. In this paper, the recent progress of the HT-7U is described.     

浅谈本地网自动业务系统的设计思路

阐述了扩充本地网交换机操作端口的必要性,实现本地网固定电话业务的实时自动处理,详细阐述了如何利用PAD来扩展操作端口以及在交换机上实现的操作过程。     

V. Yeast sequencing reports. Identification of a gene encoding a new Ypt/Rab-like monomeric G-protein in Saccharomyces cerevisiae

A Saccharomyces cerevisiae sequence cloned by serendipity was found to encode a protein that is a new member of the Ypt/Rab monomeric G-protein family. This sequence shows high homology to the yeast genes SEC4 and YPT1 and, like SEC4 and YPT1, is essential for viability. The sequence was localized to chromosome V based upon hybridization to pulse-field gel-separated yeast chromosomes. The sequence has been deposited in the GenBank data library under Accession Number L17070.     

EFFECT OF THE RATIO Th/U ON TL DATING ACCURACY

ＥＦＦＥＣＴＯＦＴＨＥＲＡＴＩＯＴｈ／ＵＯＮＴＬＤＡＴＩＮＧＡＣＣＵＲＡＣＹ￥Ｐ．Ｌ．Ｌｅｕｎｇ（梁宝鎏）；ＭｉｃｈａｅｌＪ．Ｓｔｏｋｅｓ（ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃｓａｎｄＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅ，ＣｉｔｙＰｏｌｙｔｅｃｈｎｉｃｏ...     

Genetic and physical mapping of the WBP1 locus close to CENV.

The WBP1 locus, encoding an essential component of the N-oligosaccharyl transferase, was mapped both genetically and physically. The gene is located on chromosome V between CENV and gcn4. The distance from CENV sequences is 2 kb.