Abstract:Two geometrical convergence theorems of a space decomposition method for solving a kind of nonlinear problems have been proved,which are improvements of existing results.

Abstract:This paper discusses the solution problem of delay differetial equation,which is extensively used in some fields such as dynamic system and so on,and gives the representation of the analytic solution of the neutral type delay differetial equation of the

Abstract:Considering n order neutral delay differential equation,we establish several sufficient and necessary conditions which ensure the existence of bounded positive solutions.The results extend or partly improve some conclusions given in the recent litera

Abstract:Several new sufficient conditions for the positive equilibrium to be a global attractor of a kind of difference equations were obtained.

Abstract:This paper is a study of the relationship between metal glass resistivity as well as its temperature coefficient and its ingredients.Using the Nagel Formula derived from Ziman Theory of Liquid Metals,the temperature coefficients of several types of metal

Abstract:由简单方法合成了ＰＶＣ，ＣＰＶＣ和Ａｌ２Ｏ３纵轴固载的氧桥连金属卟啉ＴＰＰＭ（Ⅲ）ＯＬ（Ｍ＝Ｆｅ，Ｍｎ；Ｌ＝ＰＶＣ，ＣＰＶ和ＡｌＯ３）并将它们用于温和条件下催化ＰｈＩＯ氧化环己烷的反应。实验结果表明，与未固载金属卟啉ＴＰＰＭ（Ⅲ）Ｃｌ比较，纵轴固载金属卟啉ＴＰＰＭ（Ⅲ）ＯＬ具有催化效率高，对产物的选择性强和重复使用性能好等优点。

Abstract:研究了８－ＱＡＱ与Ｃｕ（Ⅱ）在ＰＨ＝８．４缓冲溶液中的显色反应，实验结果表明，利用此反应测定Ｃｕ（Ⅱ）的灵敏度较高，表观摩尔吸收系数为５．９＊１０＾４Ｌ．ｍｏｌ＾－１．ｃｍ＾－１，线性范围０．８－１．６μｇ。应用于大米中微量Ｃｕ（Ⅱ）的测定，获得了满意的结果。

Abstract:This paper prensents the method and system providing gasoline engine with lean fuel air,analyses the influence on the engine performance when fuel air is thinning,and proposes the principle of controlling steady combustion on edge of unsteady combustio

Abstract:This paper draw up an automobile intelligent management system for modern community.The system with multilayer networks management can realizes many functions such as check and recognizing automobile,timer and count,burglarproof and examines.Then a method

Abstract:The paper presents the application of the fuzzy control theory for vehicle active suspension system.Taking step function simulating the road pass process as the input,the digital simulation studies for 1/4 vehicle active suspension clearly demonstrate tha

Abstract:Based on the theoretical analyses and calculations of the harmonics,the parameters of leaching harmonics are designed for the Multi Function Balance Traction Transformer(MFBTT).Under the different status of work,the primary waves of the voltages and curr

Abstract:将ＣＣⅡ引入神经网络，提出了一种新颖的电流模式神经网络，仿真结果表明，其动态特性优化电压模式网络。

Abstract:Power market is a market of market economy system.It is closely related to producer and consumer.Being sure of the system's safe and reliable operation,the article mainly establishes a two aim optimization model being directed against thermal power syst

Abstract:The soil source heat pump is a new kind of equipment to obtain the cold(or heat) energy in soil by the using of the medium.This paper studied the soil source heat pump's installation and its characteristic's measurement based on the analysis of some chara

Abstract:For the new combustion type of CWM,this paper set up a three dimensional chamber model of three dimensional radiant heat exchange of boiler.By using the enclosure solution,the paper analyses and simply calculates the temperature of the chamber,and proves

Abstract:用单位宽纵横向条带法构造了矩形板弯曲单元的位移模式，并假定横向剪切应变在单元内线性变化，由此推导出了一个具有２０个自由度的矩形板弯曲单元计算殂式，此方法满足了单元边界Ｃ＾１连续条件，克服了“剪切自锁”，可用于大型板系结构的计算。

Abstract:Based on structural optimization methods,this paper studies the base size optimization problem of single foundation under column,and provides a reasonable and applicable optimum design method.It is a valuable reference for the designing engineers.

Abstract:Considering the coaction effect of pile and soil,a method to analyse the foundation beam inner force and to determine piles bearing capacity by reliability theory is presented in this paper.A means for drawing eveloping curve of foundation beam inner fo

Abstract:The masonry concrete building in south China is taken as the study object.The mechanism of slant crack in wall on top floor is analyzed theoretically,the temperature stress in wall is calculated and the cause and harm of this sort of crack are summarized

Abstract:This paper analyzes the security risks existing in the computer network.The general structure of network protocol is proposed.We discuss the security of the cryptography technique in the network security protocol,and point out some problems that should be

Abstract:This paper discusses some methods adaptable to NMS and presents highly reliable NMS based on group.The implement technology is also discussed.

Abstract:There are many disadvantages in the network plan teehnique's application to machine building since machine building's network plan is huge and complex.In order to solve this problem we present in this paper a new network discomposition method which is sui

Abstract:Among the various factors in social economic activities,human resource has always been the most important and active one.Properly structured human resource is essential to high efficiency and profit.By case studies on the human resource of Communication I

Abstract:A conclusion-if two optimum diagrams were corresponding with the same non complete relation of activities containing partial alike predecessors,then their real sub diagrams were the same-was obtained.Several conclusions on determining dummy activities o