Abstract:This paper presents the principle of high-pass-absolute-value demodulation tcchnigue which is applied with spectrum analysis to investigate the vibration and noise produced by the C61 32 Lathe. The main noise sourse is found out and some reliable data are provided to decrease the noise and vibration and to improve the dynamic performence of the c6132 Lathe.

Abstract:The rolling cone enveloping hourglass worm pair has been successfully developed, in which there is almost only rolling friction between the meshing tooth surfaces, and both the worm and wormwheel have hard surfaces. Such a new type of hourglass worm pair is particularly-favorable for power transmission. This paper presents the design. manufacting and testing of this worm pair.

Abstract:The concept of "New Section Plane" has been proposed when the tooth flank error of normal cylidrical worm is measured on the three coordinate measuring machine .and it has been compared in many respects with the general" First Section Plane". It has been pointed out that "The New Section Plane" is superior to "The First Section Plane

Abstract:Rheological properties of hepatic bile and gallbladder bile have been studied systematically in this paper. 223 specimens of hepatic bile and 39 specimens of gallbladder bile,including the acute,chronic,cholestatic,non-cholestatic cholecystitis and cholelithiasis,are collected. The experimental results have showed that the apparent viscosity of hepatic bile decreases rapidly and becomes a constant eventually as the imflammation of biliary system declines,and that the gallbladder bile is a kind of non-newtonian liquids and its rheological properties are closely related with the pathological conditions. According to its physical characteristics,gallbladder bile can be classified into three groups. The modified Maxwell' s viscoelastical model for gallbladder bile has been proposed on the basis of the experiments and analyses.

Abstract:According to the analysis of one-dimensional radial unsteady heat conduction in an infinite medium,a transient line-source method to measure thermal conductivity of blood is provided, which is effective,accurate and easy to be carried out. By means of this method,it takes only a few seconds to accomplish the measurement. This would be a particular advantage for blood since it coagulates very quickly. With a simple apparatus,experiment has been performed and the results match the existing data of blood' s thermal conductivity very well.

Abstract:Flow and heat transfer are numerically studied in a rectangular fin groove when the fin base is heated with contsant temperature. Rayleigh number, inclination , aspect ratio, thick ness and conductivity of the fin are systematically changed to examine their effects. Five flow patterns are found, local and average characteristics are given, and the mechanism of heat transfer is discussed. The results can be used as a reference for fin designs.

Abstract:A new image reconstruction method fur electrical impedance CT is derived rigorously. The Jacobi Matrix is made sparse by analysing each narrow region which is detrmined by equipotential lines seperately. Both storage and computation can be deduced. The method is realized by using first order square FEM and some computer model is reconstructed. The relaxed version of Hildreth's method for interval convex programing is applied, which can hold the sparsity of the Jacobi Matrix and overcome the ill-condition of the matrix.

Abstract:This paper presents an analytical method to evaluate the short-term reliability for generation system. Based on the discretization of continuous Markov Process,the transient performance of short-ferm reliability is considered, and the Loss of Load Expection(LOLE) Energy Index of Reliabihty (EIR) are calculated step by step. This method is applied to evaluate short-term rehability of a generation system,and the results of the evaluation show that the method is feasible.

Abstract:This paper presents a new hierarchical and coordinative control method for reactive power optimization in large-scale interconnected power systems. It combines the interconnection forecast method for hierarchical control in large-scale steady state industrial systems with the incremental linear programming method for reactive power optimization in real time. The results of applying the method to power system examples show that the method not only solves the problem of high dimension in order, but also keeps the advantages of the incremental linear programming method. The proposed method is also suitable for the security analysis of reactive power correction in large-scale interconnected power systems.

Abstract:The structure of FCC: BCC boundary, which is expected to be partially coherent and to be defined by Nishiyama-Wasserman orientation relationship,is resimulated by computer. The results show that the misfit dislocation is not the necessary structural element on the partially coherent FCC:BCC boundary,and introducing the structural ledges in two directions brings about an increase in the interfacial coherency and a decrease in the interfacial energy. A structural model of FCC:BCC partially coherent interface is made,which replenishes with and amends the R-A model.

Abstract:The influence of carburizer in salt bath which contains some rare earth elements on the technical paramenter of heat treatment and the property of hand saws with low carbon steel are investigated. The compositional recipe of carburizer and the technical parameter of heat treatment are determined by means of the microstructrue analysis,peeling analysis. TEM observation and sawability test. The effect of rare earth elcments in chemical heat treatment of salt bath and its influence on microstructure and properties of hand saws are also discussed.

Abstract:The elastic deformation work(EDW) and elastic-plastic deformation work (EPDW) of M2 high speed steel ,M2A1 high speed steel and 301 high speed steel are neasured be simulating the real use situations and using the thermal torsion analysis. It is found that the reason that the M2A1 high speed steel' s use characters are superior to those of the M2 one is that the former has higher EDW and EPDW.Howerer,the EDW and EPDW of 301 high speed steel are much lower than those of M2 one . So mechanical cutting tools can't be made from it. The results show that the EDW and EPDW measured with the thermal torsion analysis are the main criteria to evaluate the use characters of high speed steels.

Abstract:The spraying codeposition process is used to produce metal matrix paniculate composites, whose technical procedure and main processing parameters are analyzed. The microstructure of the composites is examined and the properties are tested. The solidification characteristics in the spraying deposition and solidification process are discussed. The results indicate that several problems involved in conventional methods can be overcome with this technique to preduce metal matrix paniculate composites. The reinforce particles are dispersed in the matrix homogeneously without solidification segregation. Compared with the matrix alloy,the composite proves to be harder and has excellent wear resistance.

Abstract:Some control schemes for complex nonlinear systems have been developed recently and the robotic adaptive control is one of the typical examples. Due to the inevitable presence of unmodeled dynamics,if the adaptive control technique combined with nonlinear model-based control takes full advantages over any known parametric model while dealing with the remaining unknown parameters by using adaptive control,it may be an efficient control strategy, therefore.an algorithm of computed torque-self tuning control for robot is presented, whose simulation results have proved its effectiveness.

Abstract:This paper presents a new method of self tuning adaptive control which adopts a neural network to identify the characteristics of a second order nonlinear system, which is in turn applied to adaptive control. The simulations show that the method has good capability of sduty and adaptation.

Abstract:A new pulsed jet device is presented which can produce oscillatory pulsed wafergas jet. This device is used in the erasive experiment on the while sandbrick whose compressive resistance is 30 Mpa. The curves of the erasive effects of the oscillatory pulsed water-gas jet.the oscillatory pulsed jet and the ordinary jet are drawn in order to be compared.which are changed as the distances of the targets are changed. In addition the reason why the erasive effect of the new jet is superior to the other two jets is analyzed.

Abstract:Chevron-notched and straight-through-notched three-point bend round bars are used to test fracture toughness K of a Chongqing limestone. The results show that the former specimen has some advantages over the latter in the aspects of preventing overload,avoiding deviation of crack growth from notch plane and considering nonlinear correction in calculation,etc. However,the size effects of test values are to be solved.

Abstract:A campact twin prism Michelson interferometer is presented,in which a PZT ring is pasted on a prism surface connected with electrical circuits. Through feedback and modulation, the optical bistability is realized and the stabilization of laser intensity is acquired.

Abstract:The existence of the minimal periodic solutions of the non-constant of a class of symmetrical autonomous subquadratic second order Hamiltonian systems is studied with minimization.

Abstract:The subtropical evergreen broadleaved forest of the Jinyun Mountain Natural Reservation in Chongqing is studied the fuzzy aggregation analysis is applied to the partition of classificational unity. On the basis of strict computation, the dynamical graph of fuzzy aggregation is made and five formations are parlitioned.

Abstract:The influence of different manganese contents on strain-aging behaviors of C-Mn-Si reinforcing steel bars are investigated. With the increase of manganese, the sensibility of strain-aging is decreased to somg extent. The experimental methods of strain-aging are also dicussed.

Abstract:The recent fourty-year development of China' s power industry is introduced, and the goal of its development in this century is proposed with the way of realizing it. It is emphasized that increasing power investment and raising the proportion of hydropower and nuclear power in the power industry are significant in the development of China' s power industry.