21世界武器装备的"心脏"

被称为武器装备“心脏“的军用微电子技术是现代军事技术的核心和基础,其广泛应用于雷达、计算机、通信设备、导航设备、火控系统、制导设备和电子对抗设备等各类军用设备上.在现代高技术武器装备中,微电子装备的费用已占武器成本的一半以上.微电子技术的发展水平和规模已成为衡量一个国家军事、经济实力和技术水平的重要标志.……     

单兵武器发展思路

从广义上看，供单兵使用的武器均可称为单兵战斗武器。美苏都经历了第二次世界大战，并对取得的经验有着近乎相同的理解，双方均沿着战斗武器小口径化方向发展，不约而同地发展了小口径单兵战斗武器。而在这之后，由于美苏两国对现代战争的理解偏差及双方技术、经济水平的不平衡，对下一代单兵战斗武器的发展思路却迥然不同。     

随机微分方程终值问题的弱解

设｛Ｗｔ．Ｆｔ．ｔ∈［０，Ｔ］｝为概率空间（Ω，Ｆ，Ｐ）上的标准α维Ｂｒｏｗｎｆｃｆｃ，Ｆｔ为由它生成的自然σ－代数流。本文讨论了如下随机微分方程终值问题弱解的存在性：Ｘｔ＝ξ＋∫ｔ＾Ｔｇ（ｓ，Ｘｓ，Ｙｓ）ｄｓ＋∫ｔ＾ＴＹｓｄＷｓ其中ξ∈Ｌ＾２（Ω，ＦＴ，Ｐ；Ｒ＾ｎ），ｇ：［０，Ｔ］×Ｒ＾ｎ×Ｒｎｄ→Ｒ＾ｎ为有界可测函数。此外，还讨论了它在金融市场期权定价问题中的应用。     

物理力学及其物理基础

物理力学是一门新的力学分支。它是最近十年来才逐步建立和发展起来的。我国力学家钱学森同志最先注意到这门学科的重要性,大力提倡,并积极从事这门学科的建立与发展及人才的培养与研究组织的建立等工作,为我国今后发展这门学科奠定了良好的基础。什么是物理力学,它是为什么的,它的研究方法和主要内容是什么,这些都已在他的著作中作了详细的阐述,本文不准备多加说明。现在仅谈一谈建立和发展这门学科的重要意义和当前迫切需要解决的问题,并略述其物理基础。     

用通道耦合方法对H与H~-相互作用势能曲线的计算

对于H与H~-相互作用形成H_2~-结构的研究,最早的理论计算是由E yring等人(1)在1936年利用价键理论进行的。对以后的近六十年时间里,人们对H_2~-的结构,在理论和实验上进行了大量的研究。在实验方面,Khvostenko和Dukel~1 shii(2)所做的工作比较突出。在理论方间,Bardsley等人(3),(4),(5)也进行了一系列的计算。最近     

CALCULATIONS OF STRETCHING VIBRATIONAL OVERTONES AND COMBINATIONS OF ARSINE BY NONLINEAR MODEL

A three-parameter nonlinear model in nonlinear quantum theory,i.e.,the quantized discrete self trapping equation, has been used to calculate the vibrational energy spectrum, including the overtones and combinations with many excited quanta, of AsH stretches of arsine, AsH₃. The model calculations agree well with experiment and other calculations. It is shown that the dominant feature of the energy spectrum of AsH₃ molecule is a pattern of local mode pairs, and that when n≥4, all the vibrational energies are almost localized on a single AsH bond.     

Spontaneous grafting of diazonium salts: chemical mechanism on metallic surfaces

The spontaneous reaction of diazonium salts on various substrates has been widely employed since it consists of a simple immersion of the substrate in the diazonium salt solution. As electrochemical processes involving the same diazonium salts, the spontaneous grafting is assumed to give covalently poly(phenylene)-like bonded films. Resistance to solvents and to ultrasonication is commonly accepted as indirect proof of the existence of a covalent bond. However, the most relevant attempts to demonstrate a metal-C interface bond have been obtained by an XPS investigation of spontaneously grafted films on copper. Similarly, our experiments give evidence of such a bond in spontaneously grafted films on nickel substrates in acetonitrile. In the case of gold substrates, the formation of a spontaneous film was unexpected but reported in the literature in parallel to our observations. Even if no interfacial bond was observed, formation of the films was explained by grafting of aryl cations or radicals on the surface arising from dediazoniation, the film growing later by azo coupling, radical addition, or cationic addition on the grafted phenyl layer. Nevertheless, none of these mechanisms fits our experimental results showing the presence of an Au-N bond. In this work, we present a fine spectroscopic analysis of the coatings obtained on gold and nickel substrates that allow us to propose a chemical structure of such films, in particular, their interface with the substrates. After testing the most probable mechanisms, we have concluded in favor of the involvement of two complementary mechanisms which are the direct reaction of diazonium salts with the gold surface that accounts for the observed Au-N interfacial bonds as well as the formation of aryl cations able to graft on the substrate through Au-C linkages.     

高温高密度条件下CH_4气体分子间的排斥势函数与二级维里系数的理论计算

本文采用文献[1]所给出的关于甲烷分子的单中心球对称类氖波函数,从理论上计算了CH_4—CH_4分子间的排斥势函数和高温高密度条件下CH_4气体的二级维里系数。