片状气体放电电子束强度与能量分布的实验研究

片状气体放电电子束强度与能量分布的实验研究罗宗南，崔一平，陈松生，杨正名（东南大学电子工程系．南京２１００１８）气体放电电子束强度高，能量大，在微电子、光电子、加工、材料科学、等离子化学以及表面处理等方面有着广泛的应用前景，加以成本低廉、操作方便，是...     

发泡条件与09－Ⅱ浆状炸药爆轰感度的关系研究

０９－Ⅱ浆状炸药是一种利用废火药作敏化剂和含能添加剂的浆状炸药，这类炸药爆轰感度较低。该文以实验为基础，研究了发泡条件与０９－Ⅱ浆状炸药中敏化气泡数、爆轰感度之间的关系，这些条件包括发泡剂含量、发泡剂及交联剂的加入次序和发泡温度。文中提出了有利于提高这种浆状炸药爆轰感度的发泡条件是，（１）发泡剂含量为外加０．２％～０．３％；（２）泡剂与交联剂同时加入到炸药体系中；（３）发泡温度在４５℃左右。     

多光子解离CHClF_2富集~(13)C

用无氦TEA CO_2激光器(9μm带谱线)辐照F-22,选择性激发~(13)CHClF_2,使其达到离解,得到~(13)C的富集。测得选择系数α的峰值位置在1047cm~(-1),相对于~(13)CHClF_2的线性吸收峰位置红移了36cm~(-1),α随激光能量密度、F-22气压的增高而降低。     

超塑变形中的多机制效应

通过电镜观察发现:在超塑变形中由于微观组织的差异,不同晶粒的变形行为不同,因此产生了多机制效应。总应变速度为三种主要变形机制(扩散蠕变,晶界滑移和位错蠕变)产生的应变速率之和.在铝锌镁合金中测量了各机制对总变形的贡献,验证了多机制效应的存在.     

油溶性有机钼添加剂的研究——二仲辛基二硫代磷酸钼性能的评定

本文研究了不同浓度的二仲辛基二硫代磷酸钼加入150~#中性油和10~#汽油机油中的基本性能。对其进行了抗摩、减磨及抗氧化试验。试验表明,油溶性二仲辛基二硫代磷酸钼作为滑润油添加剂,能够有效地降低滑动表面的摩擦和磨损,提高承载能力。特别是低浓度二仲辛基二硫代磷酸钼,直接加入全配方的10~# 汽油机油中,可以得到更好的减摩效果。     

Performance and observation summary of Changchun Satellite Laser Ranging Station

This note introduces the performance and observation summary of the SLR system at Changcun Observatory, the Chinese Academy of Sciences. The performance of the SLR system has been greatly improved since August 1997. The single shot precision is improved from 5–7 cm to 1–2 cm and the normal point precision reaches 4–7 mm. The long-term stability is better than 1 cm. The amount of observation has been increased from 1000 to over 3000 passes. The whole performance of Changcun SLR system has reached the advanced level among the worldwide SLR stations.     

Research on the magnetic material of Sm-Fe matrix nitrides

In this paper, the types of Sm-Fe matrix compounds and their correlations are introduced, and progress of research on the magnetic materials of Sm-Fe matrix nitrides is also reviewed. Possible research trends of future permanent magnetic materials of SmFe matrix nitrides are briefly predicted.     

北半球斜上抛体的运动方程

给出了同时考虑地球自转和空气阻力两种影响并当空气阻力与抛体速度的一次方成正比时北半球斜上抛体运动方程的精确解。     

Simultaneous Multithreading Fau Tolerance Processor

Transient fault detection mechanism is added to simultaneous muhithreading architecture. By exploiting both ILP (Instruction l~evel Parallelism) and TLP (Thread Level Parallelism), Simultaneous Multithreading(SMT) Fault Tolerance Processor can be expected to achieve better tradeoff between performance and hardware cost than traditional Fault Tolerance Processors. Detailed simulations of 3 of SPEC95 benchmarks show that executing two redundant programs on the fault-tolerant microarchitecture takes only 40%-61% longer than running a single version of the program. The new instruction fetch algorithm enhances the performance by 0. 4%～1% to most of the benchmarks we choose randomly.     

Initiating, growing and cracking of hydrogen blisters

The growing process of a hydrogen blister in a wheel steel was observed in situ with an optical microscope, and the fracture surfaces formed from broken blisters on a wheel steel and bulk metallic glass were investigated. The initiating, growing, cracking and breaking of hydrogen blisters are as follows. Supersaturated vacancies can increase greatly during charging and gather together into a vacancy cluster （small cavity）. Hydrogen atoms become hydrogen molecules in the vacancy cluster and hydrogen molecules can stabilize the vacancy cluster. The small cavity becomes the nucleus of hydrogen blister. The blister will grow with entering of vacancies and hydrogen atoms. With increasing hydrogen pressure, plastic deformation occurs first, the hydrogen blister near the surface extrudes, and then cracks initiate along the wall of the blister with further increasing hydrogen pressure. A cracked blister can grow further through propagating of cracks until it breaks.