Abstract:The paper describes a new theory and methods for designing hyperbola, degenerate circles, involute and roulette curves which have been applied in grinding convex involute gears, cutting special profiles on a gear shaper, grinding the race-way of ball thrust bearings, form grinding and grinding cyclo-cycloidal gears with an abrasive belt. All these applications have been used in industruy with considerable benefits. The curves are produced by different combinations of straight line and circle motions, Given the curve parameters of the workpieces to be machined, the best approximate curve can be obtained from a computer program designed for this purpose.

Abstract:This paper discusses the designing of the injection mould for producing the plastic case of TV set carried out in the type IBM PC/XT (or Great Wall 0520)micro-eomputer. The procedure consists of inputting the 2-D drawings of the TV set case with the aid of sub-drawing, coding and menu specifying; setting up the mathematic model according to the relationship between the plastic part and the mould; designing the core and caving of the mould and finally displaying and plotting the drawing of the mould. The connection between the Auto CAD software and the advanced language for orogramming and the data convertion is also discussed.

Abstract:In this paper the generator's exciter/governor system are decomposed by using the overlapping decomposition method, and an overlapping decomposition decentralized control (ODDC) system is designed for the exciter /governor systems. In or.dar to enhance the dynamic qualities of the decentralized control system, the concept of the second feedback system is introduced to modify the first feedback gain matrix on the condition of the structure of the original decentralized control system maintaining unchanged. The practical decentralized control system design and its; simulation results show that this method greatly improves the control effect of the ODDC system and also holds all the advantages of the ODDC system. Besides, this paper indicates that it is a simple and effective method to control excitor/governor system by overlapping decomposition decentralized control strategy.

Abstract:By defining an operator"M", the paper has applied the improved Walgebraic method to the directed graph. The developed theory does not make non-tree combination type terms and can eliminate a large part of cancellations terms caused by. the active elements or .transformers. The paper has solved the retrogration problem for algorithm of W-algebraic method while used in the directed graph.

Abstract:This paper applies the Gear-4 algorithm to constitute the companion models lor the circuit elements and electromagnetic relays commonly used in relay protective devices. The interface computation, which describes the node equation of companion model and differential equation of mechanical moving part for the electromagnetic Jelay, is also presented. For the reason mentioned above, it makes possible* to solve more accurately the transient process of relay protective devices including electromagnetic relay using the companion model method. The simplicity and effectiveness of interface computation have been proved by the example calcultaion.

Abstract:In this paper, an analytical solution,approximate solution of initial retention, steady-state solution and numerical solution of separator equations of high gradient magnetic separation are discussed. A backward-vave method used to improve the steady-state solution and Treanor-four order Taylor numerical method are suggested for magnetic separator equations and are compared with experimental results.

Abstract:The instantaneous center of the cross-spring pivot is studied in this paper. It is also pointed out in this paper that three different kinds of center(the static geometric center the moving geometric center and the instan-tanaous canter), exist when the cross-spring pivot is deflected. Their relationship is calculated, the variation character of the moving geometric center almost condcides with the curve of S.Hildebrand's experiments.

Abstract:本文报导了真空状态下套装不同尺寸的抑泡孔管的单管在溴化锂水溶液中的池沸腾传热实验研究结果,示出了压力(45-45cmmHg)、浓度(0-55wt％)、间隙尺寸(0.5-3.5mm)对沸腾换热的影响。由实验结果回归得到的准则方程可供真空状态下溴化锂水溶液中套装抑泡孔管的单管沸腾换热计算用。

Abstract:Being a kind of MWR, the orthogonal colloacation method can be conveniently used to reduce the initial-boundary value problems of the partial differential equations to initial value problems of ordinary differential equations. In this paper, the orthogonal collocation method is introduced in detail and by using it the dynamic characteristics of a steam-water heater are investigated.

Abstract:In this paper, the formula which indicates the destruction behaviour and shear strength under the restraining dilatancy are put forward on the basis of the, reference [1] and with the asumption of elastic deformation, and the theoretical results are veritied through the model test.

Abstract:This paper analysis the mechanical process with the photoelast-ic model test ane the finite element method, and presents the basic cause of existing different pressure and different transfiguration in the strata around a stope.

Abstract:In this paper the fracture process of specimen,with single crack, double cracks and triple cracks is observed and analysed. The experimental results show that the fracture process of specimen is different because of the differention of the number, the distance and the type of array of cracks. And the fracture propagation of specimen with triple cracks and double cracks is foundmentally the same.

Abstract:In this paper a matrix method for establishing discrete system dynamic equations is presented. Using this method to establish discrete system dynamic equations, netting but the derivative of function, and matrix multiplication are required. This method suits to the holonomic system as well as the linear nonholomic system.

Abstract:In the analysis and cotnriol of sequencense system, We Want to know the behaviour of the systen, i.e what information ( or input) applied to the system can reach expected state ( or output ) . This problem is concerned with the recognization problem of the finite automata. A way to use (0,1 )-matrix to calculate this transf rmation semigroup of the finite automata and its recognization information is proposed, and variour specific (0, 1 ) -matrix represents information is analyzed in this paper.

Abstract:In this paper, by use of the pseudo-gradient vector field, the three critical points theorem in [2] is extended to the C1 function in the Ba-nach space, and therefore the three critical, points theorem in [5] is strengthened and the existence of the saddle point of the C2 function is discussed.

Abstract:In this paper, we give the theorems of the alternative, the lag-range multipler theorem, Kuhn-Tucker conditions, saddle poin t optimality conditions and duality theorem concerning efficient and weak efficient solutions when objective function be D-ordered subconvexlike. The results here have extended many conclutions of [1][3][4]