大型医疗设备电气设计要点

本文详细介绍了磁共振设备（MRI）、加速器、X射线设备等医院建筑中常用的大型医疗设备的工作原理、临床应用、负荷特性和主要电气参数，并对相应设备的供电方案、配电系统、照明和接地等主要电气设计要点加以说明，可为电气设计人员提供参考。     

入世对我国橡胶助剂产业的挑战及对策

介绍了目前国内外橡胶助剂产业的现状以及我国橡胶助剂产业存在的差距和今后的发展方向。同时指出加入世界贸易组织给我国带来的机遇和挑战以及应该如何进一步加快橡胶助剂产业发展的对策。     

Characteristics of plasma produced by MHD technology and its application to propulsion systems

This paper analyzes plasma characteristics for the newly proposed concept of a closed-loop MHD power generation combined cycle system, which is used as a pulse-driven MHD accelerator to accelerate plasma to high velocity, with a nuclear plant. In this paper, since the final goal is for the space propulsion system applications, the performance of a MHD acceleration system is also analyzed by the Q1D analysis program. Results reveal that the radial velocity with the MHD effect is accelerated rapidly at the channel exit, with a calculated maximum velocity of about 4700 m/s. Consequently, specific impulse approximately 480 s and thrust of about 6550 N are estimated. The static gas temperature is evaluated at less than 600 K, while the value of about 1800 K is calculated for the stagnation gas temperature in the MHD channel.     

Effect of Thickness Error of Accelerator Tritium Film-on Inversion of BIXS Method

BIXS (β-ray induced X-ray spectrometry) is a nondestructive method to analyze tritium, which can be affected by many factors in inversion process. The difference between tritium film’s thickness and inversion basic function spectrum’s thickness can’t be overlooked. By the Monte Carlo method code PENELOPE and experiment, it is found that the thickness error of accelerator tritium film has an effect for inversion of BIXS method. The thickness error makes a great impact on tritium increasing distribution, and a less impact on tritium descending distribution. The bigger the slope of tritium depth distribution in titanium film, the greater the influence of thickness error of tritium film on BIXS inversion.     

10MeV高能电子加速器束下物流传输系统

简单介绍了单板源γ辐照物流系统,以此为基础介绍10MeV高能电子加速器束下物流传输系统结构和满足辐照加工技术要求的功能实现;传输控制系统的硬件组成和系统方案;控制软件及触摸屏等。     

一种增强型水泥促凝剂的研究

研究了由特定条件下煅烧的石膏和芒硝组成的促凝剂对水泥强度、凝结时间及其它性能的影响。研究结果表明，该促凝剂对掺有矿渣、沸石和炉渣混合材料的水泥有明显的促凝和增强作用，当煅烧石膏和芒硝在水泥中的掺量分别为4％和2％时，水泥3d和28d抗压强度分别增加5．5MPa～11MPa和3MPa～6MPa，水泥凝结时间明显缩短，初凝时间缩短约30min～50min．终凝时间缩短约25min～120min     

石英晶体谐振器用高导电率导电胶粘剂的研制

简要介绍了一种高导电率导电胶的研制方法,论述了导电促进剂对性能的影响。实验结果证明,此国产导电胶性能良好,完全可以替代进口导电胶应用于石英晶体谐振器生产中。     

白俄罗斯辐射化学领域的研究与发展现状

本文扼要介绍了白俄罗斯共和国在辐射化学领域具有代表性的仪器设备及主要的研究进展 。     

叔丁胺的生产与发展

介绍了国内外叔丁胺的发展现状、主要生产方法和用途。建议国内和ＭＴＢＥ－ＨＣＮ工艺生产叔丁胺，以满足ＮＳ不断发展的需求。