Abstract:The linear model with linear equality constraints is considered.For arbitrary conditional estimable function,the linear conditional minimax estimator under a given quadratic loss function is defined and the unique linear conditional minimax estimator is o

Abstract:设 R(S)为一给定 n× n阶实矩阵 S的列空间 ,给出了矩阵方程反问题 AX =B在 R(S)上的对称阵类中有解的充分必要条件及通解的表达式 ,讨论了解对于已知矩阵的最佳逼近问题 ,给出了数值算法步骤

Abstract:To solve the Helfrich equation,a second order nonlinear differential equation,under the physical conditions of vesicles consisting of fluid membrane,the so called Taylor series method was introduced,with emphasis on the reproduction of the famous axisymm

Abstract:The beam on Dynamic Winkler Foundation model is adopted to calculate the dynamic impedance of a single pile,and the dynamic pile soil interaction is taken into account by use of the dynamic interaction factors.Based on these,the equations for determi

Abstract:The theory of elastic wave propagation in damaged media was studied.Basing on the fundamentals of elastic dynamics and the model of damaged mechanics,the basic equations of elastic wave propagation in damaged media are established.The basic solution of th

Abstract:研究了在弹性力学的三类变量广义变分原理中 ,变量σij,εij和ui 是否独立 ,是否包含了应力应变关系 .指出了在应用广义变分原理时应满足下列条件 :泛函中的应变能用应变表示 ,应变余能用应力表示 ;在用广义变分原理求实际问题的近似解时 ,三类变量的试探函数可以独立选择 ,但各类变量之间应不违背力学基本关系 .

Abstract:By comparative study between free radical and cationic UV curable coatings, the effect of temperature on cure speed and the influence of O 2 on cure speed and films properties have been investigated. The curing rate of both the free radical and cationic

Abstract:The polarographic characteristics of proteins have been studied.In a pH 2.66 buffer solution containing 0.070 mol/L KCl,the BSA yields a sensitive polarographic wave at -1.90 V,which can be used for determination of proteins down to 10 -8 mol/L.Th

Abstract:研究了盐酸介质中 ,在氯化纳的催化作用下 ,溴酸根离子氧化甲基红褪色的最佳条件 .吸收波长为 5 18nm .表观摩尔吸光系数为 7.2×10 4 L· m ol- 1 · cm- 1 ,溴酸根离子在 3.0～ 18μg/2 5 m L范围内符合比尔定律 .方法用于化学试剂中微量溴酸根的测定 ,结果令人满意 .

Abstract:The shaping process on RP manufacturing technology was mathematically described,and the discretization accumulation error was analyzed,which provides technologically theoretical basis for optimizing discrete direction,decreasing decomposing error and imp

Abstract:The relationship between movement and force of dual gemel structure of bus side tank door was analysed,and a software developed by author was introduced to optimize the installing position of air spring pedestal which was designed for bus side tank door t

Abstract:A new analysis method of 3 dimension(3 d) of planar parallel redundant robot was developed.And the robot's forward displacement analysis and the inverse displacement analysis were studied by the method.For forward displacement,the original equations hav

Abstract:The theoretical analysis of the precision and the calculation of finite element of two point difference scheme were presented. It shows that the scheme of Crank Nicolson has highest precision of solutions. However,there is still an effect of the oscilla

Abstract:According to the random access mode of Ethernet and the burst characteristic of arriving frame, that the arriving process of Ethernet frames obeys Possion distribution is proved, the system mode of Ethernet queue is presented, the performance of Ethernet

Abstract:The change of resistance with temperature of the carbon black/silicone rubber complex conductive rubber was studied.The change of the resistance of conductive silicone rubber during the process by rising temperature was analyzed,and the influences of the

Abstract:Based on the Internet,Intranet,Web,Asp and network database,a province power company dispatch center electricity settlement system was developed with security, reliability and efficiency. The developed system is suitable for the deregulated power systems,

Abstract:A decision making mode of integrated disposal scheme for regional municipal solid waste was presented,analyzed and explained by an instance.The process of the decision making was divided to three phases and five steps in the mode, which includes technic

Abstract:The combusting process of pulverized coal was simulated on a power furnace fired tangentially at four corners. Three different operating conditions were considered. One was changing secondary air distribution including in pagoda, waist drum and uniform ty

Abstract:Taking Streeter Phelps model for example,the effect of stochastic force on water environmental risk is explored and the fact that a minute stochastic force may have great effect on water environmental risk is also showed,which provides theoretical basis

Abstract:Combined with the revision of current Chinese Code for Design of Concrete Structures (GBJ 10 89),the shear design formula were presented for the deep flexural and circular section members.These results show a good agreement with the test data.Furthermore

Abstract:The geometry nonlinear source and behavior for large span cable stayed bridge was discussed. Hence, some researching questions about nonlinear of large span cable stayed bridge were put forward. Dealing with the combination structure of girder tower, a

Abstract:The radial deformation of the rushed stone pile in the soft foundation was discussed and the pile's different deformation mode in the vertical and horizontal was presented,as the result of it,the pile soil stress ratio expression is established on the pr

Abstract:The background, the concept, the application and the requirement of the digital image watermarking technology was roughly described and the research trend in home and aboard was introduced. The emphasis was on the analysis of all the methods classified by

Abstract:The problem of the error of calculation formula calculating the variance of grouping data within distances in statistics was put forward,and the concrete forms of correcting formula were given by the theorem of addition and the variance of even distributi