无氢类金刚石碳膜的研究进展

介绍了无氢类金刚石碳膜的制备方法 ,它们的机械、光学、电学性能 ,将无氢与含氢的类金刚石碳膜进行了简单比较 ,总结及探讨了它们的应用     

超高速电流反馈集成运放电路与特性

介绍了超高速电流反馈集成运放电路结构，基本特性以及与电压反馈集成运放在性能上的差异。     

Optimization of a Ductile-Particle-Toughened Ceramic

The nature of the interfacial bond has a major effect on the degree of toughening that can be achieved in a ductile-particle-reinforced ceramic-matrix composite. The effect of variation of oxygen partial pressure during fabrication on the bonding in an alumina-nickel composite has been investigated. Calculations suggest that wetting of alumina by nickel should always be accompanied by spinel (NiAl₂O₄ formation. A range of microstructures within a single specimen have been produced, however, indicating that wetting occurs more rapidly than spinel formation and that reduction of oxygen partial pressure during the hot-pressing process can prevent spinel formation after wetting has occurred. Within this specimen, interfaces that have been formed under nonwetting conditions or conditions under which spinel formation has occurred are weak, whereas wetting without spinel formation produces chemically strengthened and mechanically interlocked interfaces that lead to crack interaction with the metallic particles and a higher toughening increment than for other microstructures. Subsequent specimens fabricated from preconsolidation-heat-treated powder exhibit favorable microstructures throughout, are tougher, and show more-desirable resistance-curve behavior in double-cantilever-beam tests than specimens produced from unreacted powder.     

LOW-CYCLE FATIGUE UNDER NON-PROPORTIONAL LOADING

A series of strain-controlled, low-cycle fatigue experiments have been conducted on 42CrMo steel under various loading paths including circular, square, cruciform, and rectangular paths. Present experiments have shown that there is additional hardening under non-proportional cyclic loading. Non-proportional cyclic additional hardening also results in a shorter life for multiaxial low cycle fatigue. A non-proportionality measure of strain path based on both a physical basis and macromechanical phenomena is proposed. The loading path effect on additional hardening is also described well. Low-cycle fatigue damage accumulation and the evolution process under non-proportional loading is analysed via the Continuum Damage Mechanics Model of Chaboche. A non-proportinality measure is introduced in the damage evolution equation and a modified Coffin-Manson type formula is derived. A novel fatigue life prediction approach based on the critical-plane concept of Brown and Miller is proposed.     

线性二次型系统结构控制的研究

本文提出线性系统的结构控制问题，并针对定常线性二次型系统加以研究，得到有关最优控制结构和。最优控制结构的设计方法。     

激光对改变胰岛致免疫性的影响

新生猪胰岛样细胞团经准分子激光照射预处理后，其免疫原性明显降低，表明经激光预处理，有可能延长移植物存活时间。     

专家系统技术在采煤决策及设备选型的应用

专家系统的研究越来越受到人们的重视，它在综合机械化采煤中的应用刚刚起步，文章详细地论述了ＺＪＸＴ系统的知识获取与知识库构造，推理机的特点及系统的功能。     

中和室脉冲进气的蒙特卡罗模拟及实验验证

对于中和室内的脉冲气体，用蒙特卡罗方法模拟了气体压力沿轴向的分布。并用模拟进气系统和气压瞬时测量系统，对模拟结果进行了验证。得到与模拟结果较为一致的曲线，从而为注入器真空系统的设计提供了可靠的依据。并通过实验结果，给出了气体靶厚的建立时间约为６０ｍｓ。     

正庚烷-甲苯-三甘醇三元体系液-液相平衡数据的测定与关联

利用气相色谱法测定了常压下２５℃、４０℃和５０℃时正庚烷－甲苯－三甘醇体系的液－液相平衡数据，采用峰面积归一化法定量，所得数据准确、可靠。用ＮＲＴＬ模型对所测数据进行了热力学关联，求出了相应的模型参数。用该模型对本三元体系进行了预测，结果令人满意。     

SiC颗粒尺寸及含量对SiCp／2024Al复合材料性能的影响

本文对粉末冶金法制备的SiCp/2024Al复合材料的性能进行了研究。随SiC颗粒尺寸的增大,复合材料的强度降低,而塑性和磨损抗力则增加。SiC颗粒尺寸对复合材料的物理性能没有什么影响。增加SiC颗粒含量,复合材料的强度、模量均增大,磨损抗力亦明显增加,而塑性和热膨胀系数则降低。