Abstract:We investigate the commutator subgroup of a convergence group,and obtain the relationship between the elementariness of a convergence group and the cardinal number of the fixed point set of its commutator subgroup.

Abstract:Considering a kind of neutral delay differential equations,a sufficient condition for the oscillation of all solutions of neutral delay differential equation in critical state is obtained.

Abstract:Using the theory of Brouwer degree and coincidence degree,we study the periodic solutions of a kind of second order differential equations and obtain some sufficient conditions for the existence of periodic solutions of the equations.

Abstract:The plane wave determined by Maxwell equations in free space cannot be logically interpreted as probatility amplitude.However,it is proved that the square of the amplitude of the plane wave describing a light field,or say the intensity of the light field,

Abstract:According to nonlinear theory,assuming the delamination to be one dimensional model across the width and the position to be arbitrary,the nonlinear governing equations of orthotropic beam plates with a single delamination under axial load is estabilshed.

Abstract:Structure of fired alumina powder was analyzed.The alumina powder with different dispersity was prepared by ball mill and vibration mill.Invesitigation reveals effects of fineness and structure of alumina on properties of electric porcelain.

Abstract:合成了新试剂５－（２－对－磺酚）偶氮）－罗丹宁，研究了ＳＰＡＲＨ的光度性质，在ＰＨ为４．１０的缓冲溶液中，当有质量分数为０．１０％的Ｔｗｅｅｎ－８０存在时，Ｐｄ（Ⅱ）与ＳＰＡＲＨ形成１：２的约色络合物，最大吸收波长为５１０ｎｍ，摩乐吸光率为３．８１＊１０＾４Ｌ．ｍｏｌ＾－１．ｃｍ＾－１。提出的方法用于钯－分子筛催化剂中钯含量的测定，结果满意。

Abstract:The corrosion behaviors of lead,lead 4 % antimony alloy and aluminun sesquioxide thallium dioxide ceramic deposited lead dioxide in sulfuric acid were studied by linear polarization and coulostatic methods.The results show that this ceramic plate has goo

Abstract:采用Ｃｏ盐（ＣｏＣｌ２．２Ｃ６Ｈ１２Ｎ４．１０Ｈ２Ｏ）作为变色材料，无机非金属材料（ＳｉＯ２，ＣａＯ，ＭｇＯ，Ａｌ２Ｏ３粉）作为填料，制成低温可逆变色涂料，通过填料选择、变色温度、恢复原颜色时间的试验及涂料性能的检测，确定了最佳涂料配方。

Abstract:This paper proposes a state feedback control strategy with a neural network compensator,which is applied in a hydraulic position servo system.Simulation and experiment results show that performance of the classical state feedback system can be improved by

Abstract:The intensities of oil film of different kinds of lubricants have been tested,and the structure of naturally developed adsorbed film on aluminium surface of the lubricants has been analyzed.The relationship between the intensity of oil film and the struct

Abstract:A nonlinear analysis is carried out for the engagement performance of AMT vehicle clutches with multistage vibroisotation effects.Since stepwise continuous elastic and damping are taken into account,a mathematical modeling of the SISO nonlinear dynamic sy

Abstract:The featurs have been analyzed concretely for advanced production paradigms towards 21st century,such as Contemporary Integrated Manufacturing System(CIMS),Lean Thinking(LT),Holon Manufacturing System(HMS),Fractal Company(FC),Agile Manufacturing(AM),Knowl

Abstract:This paper proposes the methods of integrating intellgent control with management system for complex industrial process,and introduces the design idea,main system scheme,key technology and development process in the integrated system.

Abstract:A novel design method for high order all poles OTA C high pass filters is presented.The 2nd oredr to 7th order butterworth extremely flat high pass filters have been designed by the method and simulatively analyzed with PSPICE.Simulated results are

Abstract:This paper expounds the back propagation algorithm of the artificial neural network and proposes the prediction model of the temperature rise along the back of the stator core of large hydrogenerator based on artificial neural network.The result agrees wi

Abstract:A method of alternately magentic separating and chemical leaching was used to treat a kind of complex iron poor pyritic calcine.It has produced the concentractes of iron grade 61.4 %,iron recovery 58.4 % and relatively low impurity content basically sui

Abstract:温度、ＰＨ值、接种菌量以及不同的底物初始质量浓度对微生物厌氧降解五氯酚都具有一定的影响。通过接种驯化了二个月的厌氧污泥作为菌源，就上述几种不同的因素进行了实验。结果表明，该菌种降解五氯酚的最适温度为３２℃，较佳的ＰＨ范围为６．８－７．２；当五氯酚初始质量浓度为８０ｍｇ／Ｌ时，接种量１．２ｍＬ为饱和菌量；同时五氯酚初始质量浓度为８０ｍｇ／Ｌ时，降解速率不再增加，并且污泥降解五氯酚的速率符合Ｍｉｃｈａ

Abstract:The design,construction and field monitoring of retaining structure for a 12.3m deep excavation in Shanghai Hong Kong plaza are introduced in this paper.On the basis of setting up calculation FE model of retaining structure and developing three dimenion

Abstract:分析了在桩头作用和谐和荷载时有限长桩与无限长桩的动力反应，并进行了对比，分析表明，在一般情况下，当桩长径比ｌ／ｄ≥１０时将有限长桩作为无限长桩来分析，所得内力与位移最大值误差差在工程允许范围内。

Abstract:Percolating and the equivalent electrical circuit of cement based conductive composite are analyzed.The characteristics of the lower percolation are found out.A new way to determine the lower percolation is proposed.Carbon fiber reinforced cement and gra

Abstract:The equation of pile bearing beam was estabilished based on the finite condensing layer method and the finite element method.The properties of bearing beam were analyzed under several factors such as the non even soil,diversity of pile quality and of t

Abstract:This paper obtained a kind of storage structure of tree by using static arrays,and has given out some algorithm based on this storage structure by C language.This storage structure avoids the difficulty that the number of linked range in linked list is in