Abstract:A set of coal samples are characterized by FT-i.r. spectroscopy, and the assignment of the frequencies observed in coal spectra is analysed and discussed in delail in this paper. At the same time, the law of the variation of the groups in the macromolecule of coal with the increase in the rank of coal is researched.

Abstract:A method which uses computer to model the form cutting of helical is presented and quantitatively analysed the errors of the ptofile shape and its position from the deviations of manufacturing and installing of the forming cutter and helical movement of the machine tools are quantitatively analysed, the optimum technique is used to revise the adjustable parameters for compensating the error. It is valuable in engineering application.

Abstract:This paper inferred a new high-speed method of tool-life testing from the differential median theorem of the pluralistic function. The characteristic of the method is that by using one cutting edge and doing one wear curve the tool life equation T=Cvx can be obtained.The drain on the workpiece and time of the method decreased by 2/3 as compared with that of the conventional testing method. The test has verified the method in the paper.

Abstract:The die profile on the drawing performance is invrstigaled by the optimization method. The optimization model based on the critical condition of wrinkling is established the optimization solution can avoid the accurrence of wrinkinp; and assure the smallest Fmax and the biggest deep-drawing ratio.

Abstract:The calculating burden of the decoupling judgement of multi-area power system load frequeney centrel is very large by tranditional methods. This paper changcs the decoupling judgement problem into a minimum cost network flow problem. The solution algorithm is out-of-kilter . algorithm which is characterized by simple manipaultion, fast and reliable convergence. In the paper, we discuss and calculate the decoupling problem of two arca power system load frequency control. The results show that the proposed approach is feasible and effective.

Abstract:A method of anticipated failure analysis(AFA)in HV AC/DC hybrid systems is presented in this paper for the first time. In this method node-injection-power is used to simulate outage states of AC/DC branch circuits, linked with the fast decoupled load flow, to obtain the load flow solutions after the anticipated failures. An example for calculation in this paper shows the effectiveness and correctness of this method and computer programs.

Abstract:An analysis of the influence of channel on signal transmission in the wired measurcments-while-drilling ( MWD ) system is made. The cases of reflection and refraction to the signal at connecting points of wires are analysed. The transmitting channel must consist of many sections of wires in this measuring system. A few noteworthy practical problems arc put forward when designing this message-transmitting channel.

Abstract:A new L-type viscometer,the resuit of the improvement of viscometer L-1, is described. This instrument not only retains the advantage of viscometer L-1 s obtaining the apparent viscosity of non-Newtonian fluid as a function of shear rater covering a certain range by a single test, but can work efficiently when the shea: rate of the specimen is too low for apparent svicosity to be measured with conventional viscometers. Besides, it only needs less than 2mL of specimen for a test.

Abstract:An approach to obtaining optimized signal probabilities of PIS is presented at the functional level. A design for testability is offered to preprocess the Circuit Under Test (CUT). An algorithm to produce Maximal Supergate ( MSG ) is given to reduce a circuit to a tree s e. The computing complexity is decreased, which greatty improves [l].

Abstract:Form the crack propagation rate and the cyclic stress-strain respon- dence of low cycle fatigue, the C-M formula is theoretically derived by using the correcting factor. The constants in this formula are also estimaled and discussed.

Abstract:Based on the blasting theory and "Fracture Mechanics " , the directing effect mechanism of V-netch in V-rotching blasting is studied and the positive splitting and directional explanding of crack within V-notching blasting and the priority of crack's expanding in the V-notch axle-plane etc are expounded. It's just these fracture characteristics mentioned above that ensure the fine control of the cracking plane.

Abstract:A method for designing the auxiliary ventilation system for long drivages with multiple fans spaced in series in long duels is proposed based on the criterion that no recirculation takes place between the air flowing in the duct line and the surrounding air, A recurrence method is also given to calculat the leakage and the resistance lose of the duct taking into account of the relationship among the pressure, resistance and the leakage of the duct. The calculating results show that the present method is belter than the other methods.

Abstract:A new method with which to calculat the displacements of beams and frames is presented. The areas of tending moment diagram of beam or frame and the slope at the origin of the elastic curve are treated as some rotatable vectors with this method. Angular displacement and in-line displacement can be calculated by using the projection and moment of these vectors. This method can be used to calculate displacement of the bar and the bar syttem ( including three dimensional forms. ) , which made from linear or ncnlinear elastic materials. The cross section of the bar is changeable.

Abstract:This paper describes the initial idea of building up a new approach of spectroscopic ellipsometry for studying electrochemieal reaction from some of the author's experimental results on ellipsometry. The results which have proved the possibility of this idea is also presented. The study on an odic oxidation of iron and the oxidation and reduction processes of polyaililine film by ellipsometry with different wavelength show that the ellipsometric spectroscopy might be a new method for analyzing electrochemical reactions.

Abstract:The productive forces distribution model with entropy constraint is established. it satisfies both the demand with minimization of total cosls and the other demands with optimum distribution at a certain level. The model's regular optimal solution is a gravity molel..

Abstract:A class of cubic parameter curves are given. Hermite curve, Ball curve, Bezier curve and Timmer curve are its particular cases. Under certain conditions, this cubic parameter curves have the following properties: Convexity, retaining convex form, contact with the second edge of characteristic polygon and so on. This curve is different from Bezier curve, because its, shape can be changed after its characteristic polygon is given, so its shape can be changed according to our actual requirements.