Abstract:This paper studies the effects of rare earth elements(RE) in the gas carbonitriding and puts forward a systematic proposition of the rare earth elements catalyzing mechanism.

Abstract:Based on the analysis of the transient characteristics and the dynamic magnetization process of the current transformer, this paper proposes a numerical simulation model for the single and double magnetization transient process of the current transformer,

Abstract:The effects on stress corrosion cracking (SCC) resistance of 50Mn18Cr4 retaining ring steel by overlap-implanting chromium and erbium ions have been studied. The results of high temperature SCC comparative tests show that the resistance of 50Mn18Cr4 steel

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Abstract:In this paper, we study the wear form of a conventional HSS W18Cr4V drill in drilling the quenched steel with middle hardness(HRC36-40).The drilling conditions and the optimization of the drill point are discussed.

Abstract:The working state of cutting tools has an important influence on the normal conditions of a machine tool. To detect the losing efficacy of cutting tools has become extremely urgent. This paper presents an alarm system for the breakage of the cutting tools

Abstract:A new method for modifying the structure dynamic model has been developed in this paper.By taking the modal test results as the criterion, this method can be used to modify the structural parameters to get better agreement between analytical and experimen

Abstract:By constructing a mathematical model of a simple shunt inverter on the base of its basic working waves, this paper presents a multimode PI adjuster which uses the turnning-off time as a feedback signal and the cycle T(n) of phase change as an output. And

Abstract:Based on the Simplex and Gradient method, a new algorithm (EBM) is presented for solving the quadratic programming with upper and lower bounds. Firstly the ideas of Beale's method and extended LP are analysed, and then an extended Beale's method (EBM) is

Abstract:In this paper, a new and efficient tree-enumeration method (the cutting method) is presented to generate network functions in all symbolic forms for a general linear network. This method, based on the idea of graph partitioning, has all the main advantage

Abstract:Based on the principle of minimum potential energy and the nonlinear geometric equation of the beam element, the geometrical nonlinear stiffness matrices are derived for a three-demensional beam element in this paper. Of these matrices, the large displace

Abstract:In this paper, the iteration method is used to calculate the free vibration of tall building structures and the iteration formula is derived with the static analysis. The principle and general steps to calculate the structural frequency and mode by using

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Abstract:This paper proposes a method to modify the coal ashes with coupling agents and surface activated agents. Some performances of the activated coal ashes used in polyvinyl chloride(PVC) are tested. The results show that this is a useful way to reuse the wast

Abstract:This paper discusses the parallel FFT algorithm on the hypercube architecture. Based on the analysis of the communication complexity, the speedup of the algorithm is derived. Comparing with the ring or the mesh architecture, the parallel FFT algorithm on

Abstract:In this paper, we study the least-square problem of the revolution about the subspace. The expression for the solution is derived and the numerical method is described.

Abstract:In this paper, we consider the initial boundary value problem with the homogeneous boundary condition for the system of evolution equations. By using the stable set, we obtain the existence of global weak solution and the Blow-up of local weak solution fo