镁合金和其他金属及合金的焊接

综述了镁合金与异种镁合金、铝合金、钢、铜及其合金、钛及其合金异种材料焊接的国内外研究现状,并指出最新发展动态及未来发展趋势。     

聚铁絮凝剂处理高浊度原水的研究

本文研究了无机高分子铁盐－聚铁及其和有机高分子絮凝剂ＰＡＭ复配使用处理高浊度原水的最佳实验条件、絮凝性能、效果和机理，为铁盐絮凝剂的选择和管式絮凝器的研制提供了理论依据。     

论物货企业机电产品营销问题

随着商品经济的不断发展,市场竞争日趋激烈,经营机电产品的物资企业面临严峻的形势。采取怎样的营销策略,才能在这瞬息万变的竞争中生存、发展、壮大,这是每个企业都十分关心的问题。本文拟就机电产品的营销问题进行探讨。     

NUMERICAL SIMULATION OF IMPACT RESPONSE OF COMPOSED CERAMIC/COMPOSITE ARMOUR

ＮＵＭＥＲＩＣＡＬＳＩＭＵＬＡＴＩＯＮＯＦＩＭＰＡＣＴＲＥＳＰＯＮＳＥＯＦＣＯＭＰＯＳＥＤＣＥＲＡＭＩＣ／ＣＯＭＰＯＳＩＴＥＡＲＭＯＵＲＮＵＭＥＲＩＣＡＬＳＩＭＵＬＡＴＩＯＮＯＦＩＭＰＡＣＴＲＥＳＰＯＮＳＥＯＦＣＯＭＰＯＳＥＤＣＥＲＡＭＩＣ／ＣＯＭＰ...     

关于物资配送的探讨

随着物资流通体制改革的不断深化和社会化大生产的需要,建立高效、通畅、可调控的物资流通体系,实现物流社会化、现代化、合理化是当前的紧迫问题。代表先进物流方式的物资配送问题,引起了人们的关注。本文就物资配送的几个问题作一些探讨。     

国外高能量密度材料与目标化合物CL—20的进展

介绍了国外高能量密度材料(HEDM)发展的新动态。以多硝基/硝胺基多环化合物和主体笼形化合物等的开发研究作为契机,HEDM发展进入了一个新的阶段。CL-20即六硝基六氮杂异伍兹烷(HNIW)是一个很有前途的多环硝胺主体笼形化合物,本文着重评述它的结构、性能、应用及合成途径。认为通过它的六氮杂前驱物体系的基团转化而引入硝基的途径是可取的。     

Study on an automatic multi-pin insertion system for preparing Z-pin composite laminates

As a three-dimensional layer enhancement technology, the Z-pin technology is suitable for manufacturing composite prepreg laminates and can also effectively improve their interlaminar properties. In order to manufacture Z-pin composite parts efficiently, this paper proposes a transi- tional insertion system, and according to the technical requirements of the transitional insertion process and the functional requirements of the transitional insertion platform, proposes a transition insertion plan which can insert multiple Z-pins into a carrier. A prototype machine has been designed and made, and a series of function debugging and verification experiments have been car- ried out on the machine. Some problems show up during the experiments, but based on the analysis of the reasons, this paper provides lots of solutions, and finally demonstrates the feasibility and practical value of the system. The results show that the system meets all technical requirements of the Z-pin insertion process. It is capable to insert multiple Z-pins into a foam carrier; as a result, the system is as much as 5 times more efficient than existing equipment, and the deviation for the insertion distance can be controlled within 0.3 mm. This Z-pin transitional insertion platform pro- motes the use of Z-pins in national defense and lays the foundation for commercializing the Z-pin technology.     

多频谱兼容隐身材料研究进展

多频谱兼容隐身材料具有明确的研究和应用背景。综述了国内外在红外及雷达兼容隐身材料、红外及可见光兼容隐身材料、红外与激光兼容隐身材料等多频谱兼容隐身材料技术的发展以及多频谱兼容隐身材料在热点领域如光子晶体、掺杂氧化物半导体等所取得的研究成果和进展,指出今后的多频谱隐身材料发展的方向和重点。     

整体复合材料结构分层特性研究进展（一）

整体复合材料件越来越多地被用作现代航空航天器的主承力结构,而分层是其最易出现的破坏形式。本文作为整体复合材料结构分层特性研究综述的第一部分,重点介绍界面断裂力学和应力分析方法。论文首先对复合材料失效和分层研究进行了简要的回顾,然后详细介绍了界面断裂力学发展的历史、基本公式和在复合材料分层研究中的应用,并且介绍了几种界面裂纹尖端场的求解方法——J积分、修正的裂纹闭合积分（Modified Crack Closure Integral）和M积分法。其次,对应力分析在复合材料分层研究中的应用进行了简要的回顾。     

Identification of crystal orientation for turbine blades with anisotropy materials

A novel approach to identify the crystal orientation of turbine blades with anisotropy materials is proposed. Based on enhanced mode basis, with the main advantages of its efficiency, accuracy and general applicability, the blade vibration mode of each order is linearly constructed by several specified mode shapes, which are obtained from the considered turbine blade with specified crystal orientations correspondingly. Then, a surrogate model based on Kriging method is introduced for constructing the condensed perturbed matrix of stiffness in order to improve the efficiency even further. The constructed surrogate model allows to perform the modal analysis of turbine blades with arbitrary crystal orientations in higher efficiency, due to the fact that the elements of condensed perturbed matrix of stiffness are considered in construction of the surrogate model rather than concerning the perturbation of all the elements of the initial stiffness matrix for the blade. Genetic algorithm is finally employed to optimize the defined fitness functions in order to identify the crystal orientation angles of turbine blades. Several corresponding examples demonstrated the accuracy, efficiency and general applicability of the proposed method.