Abstract:The spline boundary element method is presented for electromagnetic field problems. Based on B-spline function interpolation, the formulation of calculation of two dimensional statical electromagnetic field problems is obtained. Boundary corner and singular integration problems are efficiently handled. Furthermore,the Method is used for solving two calculation examples.

Abstract:Complementary variational principles are applied to the analysis and computation of three-dimensional electrostatic field. The computation errors of field with the potential differential method (PDM)and complementary variational method (CVM) are all shown and compared. By using CVM.we can obtain a field accuracy much better han PDM. To compare the accuracy of numerical methods more easily.a three-dimensional field model which may be expressed analytically without using an infinite series is constructed. This model can be used as a ' Benchmark' of numerical method for three-dimensional electrostatic field.

Abstract:Based on a non-linear system model, an adaptive control methodology is presented for a parallel AC/DC power system by means of on-line recursive parameter identifications. Taking the advantage of rapid power regulatiing ability of the DC power system and combining with the generalized minimum variance self-tuning control principles, the dynamic qualities of the controlled system has been greatly improved. Using SISO form makes the control system very simple to implement. Through the design, simulation and analysis of the self-tuning control system for a practical example, it shows that the self-tuning control strategy is very promising for AC/DC power systems.

Abstract:The tooth contact mechanism of hypoid gear under load with similar model experiments is presented and the effect of mounting deflections and tooth deformation on tooth contsct is discussed. Thus, the basis of founding loaded tooth contact analysis calculating method of hypoid gear is brought about.

Abstract:Model CL256 MOS Image Sensor is a newly developed solid image sensor, called self-scanned photodiode array(SSPD)abroad. Silicon gate P-MOS technique has been adopted in developing the device ,and a kind of three FETS dynamic circuit with varactor bootstrap has been adopted in developing the shift register used as scanned circuit. The circuit has the advantages of high speed and low power consumption. It is very important in developing high-oder digit SSPD devices.

Abstract:The present paper discribes experiment research of effect of the inclination on heat transfer on 9 kinds of plain tubes in atomosphere, working fluids are distill water and ethanel. Experinent result show very obvious effect of inclination of pool boiling heat transfer. The larger heat transfer increases, the larger the inclination does. The correlation obtained on 524 experiment data can be used for reference to engineering design in prospect of heat transger coefficient.

Abstract:The frequency spectrum analyses of several vibration on No. 4 Unit in a power plant are made and the experience of the future failure diagnosis on turbogenerator is collected in this paper.

Abstract:The phase transformation in the diffusion layer after slow cooling and aging of pure iron ion -nitrided was investigated with TEM. Refering to principle of Moire method measuring macroscopical strain, the values of coherent strain at interfaces between a" and aN phases were determined by means of TEM analyses.

Abstract:On the basises of optimization theory and cross-experiment analysis, the mate scheme of structural parameters of the hydraulic operated check valve having the best performances is deduced in this paper,the notability of the structural parameters affecting the valve's performances is discussed,and the main-minor relation between factors is found.

Abstract:本文详细分析了岩体蠕变变形发展三个阶段的基本特征,提出一种摩擦元件和阻尼元件并联的滑坡中短期预报模型:滑坡发生在加速蠕变阶段,可以用反映摩擦特性和阻尼特性的材料参数不断恶化(文中假设线性变化)予以反映。最后,用三个滑坡实测数据对模型进行了检验。

Abstract:Real-time holographic three wavefront interferometer combineing wavefront interference with holography has been proposed in this paper. The apparatus can be used for a number of pratical applications including the measurement of flatness for an optical flat. Thickness for transmissive or refective films. It has peculiar character comparing with other interferometers.

Abstract:A solution on the identity of both scales, Klopman' s softness (K-scale) and Parr and Pearson' s absolute hardness (P-scale) ,for reactivity of hard and soft acids and bases (HSAB) is made in both theory and practice. And the respect of applications is discussed also for the scales.

Abstract:证明了高压输电网中的一个二阶非线性常微分方程x+RF'(x)x+1/LF(x)=Acosωt,F(x)=sum from i=1 to n(a_(2i+1)x~2i+1))在一定条件下存在唯一的周期为2π/ω的渐近稳定的周期解。

Abstract:讨论了有界区域上的Dirichlet问题正解的存在性。通过对达到临界Sobolev嵌入最优常数的极值函数带权L2n/n-2范数的细致估计,克服了失去紧性的困难,因此得到了正解的存在性。本文对Q(x)的限制是较弱的。

Abstract:The singular perturbation problem of 2-order quasilinear elliptic is discussed, the outer solution and N-order successive equation of boundary layer term is given,and the remaind term is estimated. Hence,the asymptotic expantion of solution and the existence and uniqueness of the solution of the perturbation problem are derived.