Abstract:Aimed at soving the problem existing in the knowledge-acquisition directing-operation expert systems, a new method is proposed to acquire knowledge of expert-operation, excluding errors existed in examples and reinforce the accuracy of examples,the goal of knowledge acquisition can be achieved, the method presented in this paper solves the problem of self-enhancement of expert knowledge on line efficiently.

Abstract:In this paper, the excitation principle and operating characteristics ofasynchronized turbogenerators are analyzed,and adaptive tracing iterative control strategy based on state identification is proposed. In order to apply this control scheme to practice engineering, some primary elements are analyzed and presented for constituting dual-channel automatic excitation control system of asynchronized turbogenerators. Finally, the paper presents the principle structure charts about excitation control system of asynchroized turbogenerators.

Abstract:The paper presented a new micomechanics load-transfer model for single-fibre fragmentation test. The interfacial shear streength and the crack will develop along the interface. The fibre stochastic strength distribution was modelled by a two-parameter Wibull distribution. The influence of the interfacial bonding strength and fibre axial-tensile strength on stress states in components of composites was discussed. The interfacial state during the fragmentation process may be one of following three states: 1) fully bonding; 2) partial bonding; 3) fully debonding; according to the fibre axialtensile strength and interfacial properties (including interfacial bounding shear strength, interfacial friction coefficient and matrix radial pressure) after elastic constants and geometrical parameters of composites phases are given. The necessary conditions for these three states were discussed- Finally, a suitable definition of the critical fibre length was given and the critical length was constrouted by two parts :debonding fibre length and bonding fibre length.

Abstract:Authors approach problems of anti-plane deformation in honeycomb plates by using model of polar material in which exist couple stresses. Equivalent constitutive equations are introduced in the paper and equivalent couple stresses are contained in it. It shows that in analysis of one-dimensional problem of statics the relationship of stresses to torsions and of couple stresses to strains may be negligible and this neglect simplifies analysis of problems.

Abstract:The trajectories and characteristics of a solid particle which is raised from a dust deposit after the passage of a weak shock wave are explored by numerical simulations and compared with available experiments and previous computational models. The present model shows general good agreement with laboratory experiments under various test conditions.

Abstract:A new mathematical model for the coefficient of variable permeability affected by coal body, secondary stress & pressure in coalseam & a constitutive equation for gas migration are improved on the basis of the secondary stress & deformation of coal body around boreholes in coalseam. Using this model and equation,the gas flow field belongs to the 20102 experimental zone in BaiJiao coal Mine is computed & this verifies that the model & constitutive equation are both agreeable to practical results. Simultaneously, a comparison between the variable and constant permeabilities is carried out.

Abstract:对用光学碱度确定铁液中氧含量方法的可靠性进行了研究,结果表明铁液中氧质量分数W_o不单纯地决定于炉渣的光学碱度和温度,还与渣中铁离子的摩尔分数相关。利用它们间的关系式计算的W_(o·max)结果显示,FeO的光学碱度值取1.0是合适的。

Abstract:In this paper,the seeking optimum method for determining symmetrical axis of cam, the method for acquiring the obsolute lift value of every sampling-point on cam, and the method for obtaining the lift error of node on cam as well as curve of lift error by fitting with N order harmonic components are described. These methods, mentioned above consist of the computational methods for cam lift error by the computer controlling multi-measuring probes instrument for auto-measuring cam shaft.

Abstract:A new type of three dimenstional inner microfin tube is devoloped. Under four different pressures and in the range of condensing mass velocities from 33 to 153 kg/m2 . s,and by the experimental study of the three kinds of tubes with different microfin parameters, the performances of the condensation heat transfer for R11 in the horizontal microfin tubes and obtained. The experiments show that the inner microfin tube is a hopeful and nighty effective condensing heat transfer enhancement tube.

Abstract:Solving methods of wind quantity in complex ventilation meshes which includ wind pressure source are researched. A general matrix model of ventilation meshes and new iterative formulas are proposed. Two computing examples are given and the results shows that each branch' s wind quantity can converge the stable value by several times of iteration for any iterative initial value. The proposed model is suitable for wind quantity computation with complex ventilation structure of electric machines.

Abstract:In this paper,we introduce the concept of Borel removable sets into the research of angular distributions in the cases that entire functions and their derivatives assume two small entire functions with the multiple value taken into account, and that meromorphic functions with infinity being a Nevanlinna deficient value and the derivatives of all orders assume two small meromorphic functions,and we prove the existence of the corresponding singular directions.

Abstract:Using the Nehari argument about the constrained extreme values and the theorem that the functional defined on complete Finsler manifold and satisfying the Palais-Smale condition and having lower bound has a minimal value point,we study the existence of the minimal periodic solutions for nonconvex quadratic and superquadratic second order Hamiltonian systems.

Abstract:Using the back-propagation alogrithm and Partial Least-Squares Method the Structure-Activity Relation of Fentanyl derivatives and quantitative analysis of five organic compounds mixtures were studied on the UV Spectrophotometer-PC/AT On-Line system. Results show that the BP Model has good qualitative pattern recognition and quantitative estimation ability, and the PLS algorithm has more accurate quantitative ability and less accurate qualitative pattern recognition ability than BP model.

Abstract:首先给出了线图连通度K_L的一个上界:K_L≤δ+Δ-2;其次得出了在条件δ≥[n/2]+1下K_L的一个很好的下界:K_L≥2δ-2;由此得到当δ≥[n/2]+1时,若G为正则图,则K_L=2δ-2,若G为拟正则图,则K_L=2δ-2或2δ-1.

Abstract:On the basis of analysing the principle and usual control way of taper WEDM, a new control way of taper with two interpolating systems and a following discriminant, is presented. The result of application shows that this control way is practical.

Abstract:在实验室条件下研究了控轧控冷工艺对６０Ｓｉ２Ｍｎ弹簧钢组织性能的影响，研究表明：６０Ｓｉ２Ｍｎ钢采用奥氏体再结晶区控轧，轧后以６￣１０℃／ｓ冷却速度控制冷却，可获得球团细小且均匀的珠光体加少量铁素体组织，热轧钢材的强韧性显著提高，同时减少了脱碳。

Abstract:T On the basis of introducing battery testing device main circuit, dissipated-heat device using cold water or forced wind for battery testing device has been designed and two kinds of dissipated-heat effects have been analysed and compared in this paper. The scheme and data introduced in this paper are very useful for battery testing device designed.

Abstract:In this paper, we first introduce basic work principle of the automationcompensation power voltage stalbilizer and in the second step we derive quantitatively the two computational formulas of two types of power elements,t. e. compensation transformer and auto-transformer, for determining their capacities, thus we have showed quantitatively the main adventage of this type of voltage stabilizer.

Abstract:In this paper the author' s study on the monitoring measurement technique of NATM,the regularity and conditions of the country rock deformation are analysed based on the site measurement data in the west section of Zhongliangshan tunnel. The regression analysis of measure data for different measure lines of vavious country rock is done by the use of self-compiled CRAP program. The stability criterion for various rockmass and optimum time for primary and permanent support are provided. The conclusion available could conduct the theoretical research of NATM deeply as well as tunnel design and construction.

Abstract:According to the especial mechanical properties of bio-soft tissue materials, we design a mechanical test system of bio-soft tissue moterials which is controlled by microcomputer and can execute the post-processing for bio-soft tissue materials. The system can solve better the problems of reliability and accuracy appearing in the test of the mechanical properties for bio-soft tissue materials,and the test is convenient as well as speedy,and provides an effective experimental means for the study of biomechanics.

Abstract:The authors introduce a new type of drives--traction drives,and summarizethe present situation of theoretical study on traction drives.