INVESTIGATION ON SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS OF TiAl INTERMETALLIC COMPOUND

The self-propagating high-temperature syn-thesis method was used to synthesize the TiAl intermetalliccompound,and two kinds of synthesis modes were studied inthis paper.The results show that the thermal explosion modeis suitable for the synthesis of TiAI,the pre-heating tempera-ture has a great influence on the synthesis.Microstructurestudy show that the density of the sample fabricated by thermal explosion mode is higher than that fabricated by propa-gating mode.     

会计职业道德对提高会计信息质量的影响

会计信息质量与环境、会计系统等诸多因素有关,同时会计职业道德也是一个非常重要的因素。它作为一种引导和制约会计行为的社会规范,与会计信息的质量息息相关。我国会计信息质量的现状不容乐观,重整我国会计职业道德,将对我国会计信息质量的提高起到积极的推动作用。文中分析了会计职业道德的特征和现状,提出了重整会计职业道德的几点思考.     

基于熵、能量函数的BP网改进算法

为了增强ＢＰ网隐层的归纳能力，文［１］提出了调整权重的熵方法，我们在文［２］中给出了基于能量函数的改进算法，本文把文［１］算法与文［２］算法结合在一起给出了新算法，实验证明此算法既能大大加快收敛速度，又可增强网的归纳能力。     

高放废液中^126Sn的放化分析

以甲基异丁基酮(MIBK)萃取为主要步骤,放化分离高放废液中的~(126)Sn。全流程化学回收率约为60%。以SnO_2形式制成测量源,用HPGe γ谱仪测取γ谱图,由~(126)Sn的子体特征γ能峰面积,经化学回收率、探测效率校正后,计算得到高放废液中~(126)Sn的含量为371±29 Bq/ml。~(126)Sn的放射性活度约为高放废液总活度的4×10~(-7)。     

分子介质中的正子素形成几率与辐射保护效应

从辐射化学的观点出发,引入辐射保护函数(F)的概念,根据云团反应的竞争机理,建立了“理想二元体系”中正子素形成几率和保护函数之间的关系式;并且,根据此关系,对正庚烷——正穴清除剂(二噁烷,三乙胺,吡咯烷)体系的I_3值及对一些阴离子(I~-,Br~-,Cl~-,S~(2-),SCN~-和F~-)水溶液中的I_3值随溶质浓度的变化进行了定量地拟合。发现,在正穴清除剂体系中,吡咯烷与其他两者相比,对正庚烷具有较大的辐射保护效应;而对阴离子水溶液体系,阴离子对水的辐射保护效应从大到小的顺序是:I~-,SCN~-,S~(2-),Br~-,Cl~-,F~-。实际上,F~-对水毫无保护作用。     

损失气求取方法研究

当逸散时间较长时，用直线回归法采取损失气结果偏低，而逸散时间较短取点数少时，结果偏高。曲线拟合法是比较实用的一种方法，但计算工作量较大。经过模拟实验证明，在变围压条件下，甲烷的解吸规律也服从经验方程Ｑ＝ＷＪ［１－ｅｘｐ（１－ｍ＿１￣ｍ２／ｍ＿２］，并推导出迭代法求取损失量的计算公式。     

Research on theory and key technology of trusted computing platform security testing and evaluation

Trusted computing has become a new trend in the area of international information security, and the products of trusted computing platform begin to be used in application. Users will not use the products of information security, unless it goes through the testing and evaluation. Here we concentrate on the testing and evaluation problem of trusted computing platform, begin with constructing proper formalization model of trusted computing platform for testing, and establish a mathematical chain of trust model...     

LabView实现远程数据采集与传输

阐述了在NI Lab View平台上结合TCP/IP协议进行数据传输的工作方法，并给出对工业现场数据采集传送与监控的仿真实例。     

Windows8版高德地图助你掌控前行之路

高德地图是国内一流的专业地图应用,提供基于地理位置的全方位生活服务信息,海量兴趣点随意搜索,衣食住行吃喝玩乐,各类资讯一应俱全。高德地图是最早与微软合作,并率先支持Windows8平台的地图提供商之一。高德地图为Windows平台用户量身打造了全新的UI界面,并针对触控操作进行了优化。点击打开后,高德地图将在全屏状态下显示,操作快捷方便,界面简洁美观,与全新Windows的风格一脉相承。     

Tradeoff Analysis for RMS of Equipment Based Operation Availability and Life Cycle Cost

Reliability, maintainability, supportability (RMS) are the important performance indexes of equipment, which affect not only the availability, but also the life cycle cost (LCC) of the equipment. First discussed is the qualitative relation between reliability and LCC and the costs which may be used to enhance the reliability. Secondly, the factors that affect the maintainability are summarized, and if maintainability is advanced, the trend of the LCC is depicted. Thirdly, the qualitative relation between th...