Abstract: In order to avoid enterprise information system (EIS) risk, the self-organization mechanism of EIS based on complex adaptive system (CAS) is studied. Firstly, self-organization properties of EIS are analyzed, which include open system, nonlinear characteristics, far from equilibrium and fluctuations. Secondly, the complex properties and complex adaptive properties of EIS self-organization are studied. The complex properties include multi-agent, active adaptation of agents, multi-level nature, technology complexity, organizational complexity, process complexity and environment complexity. The complex adaptive properties include aggregation mechanism, identification mechanism, non-linear characteristics flow characteristics, diversity characteristics, internal model mechanism and block characteristics. Finally, architecture model of EIS self-organization is proposed as well as its macro and micro models, which provides a new perspective for EIS and helps understand the rules of EIS implementation.
Abstract: A low power low-dropout (LDO) voltage regulator with self-reduction quiescent current is proposed in this paper. This proposed capacitorless LDO for Silicon-on-Chip (SoC) application has introduced a self-adjustable low-impedance circuitry at the output of LDO to attain stability critically during low output load current (less than a few hundred of micro-ampere). When the LDO load current increases, it reduces the LDO output impedance and moved the pole towards higher frequency away from the dominant pole and improving the system stability. When this happen, less amount of quiescent current is needed for the low-impedance circuitry to sustain the low output impedance. In this proposed LDO, the quiescent current that been used to sustain the low output impedance will be self-reduced when the output load current increases. Thus, the reduction of quiescent current at low output load current has tremendously improved the efficiency. The simulation results have shown a promising stability at low load current 0~1mA. The dropout voltage for this LDO is only 100mV at 1.2V supply. The proposed LDO is validated using Silterra 0.13μm CMOS process model and designed with high efficiency at low output load current.
Abstract: This paper addresses the issue of how to get the optimal tracking parameter matching scheme. At first it establishes the comprehensive evaluation system of target tracking parameter matching scheme which includes four indexes such as capturing probability, getting probability and so on. Then based on the AHP it brings forward the evaluation method based on multi-index decision making to realize the optimized scheme evaluation. Because of the number and level of the parameters, there are numerous parameter matching schemes. So it utilized Uniform Design to optimize simulation experiment number and calculated optimized parameters matching scheme by generalized regression equation. At last, the design examples present the validity and practicability of this method on solving the problems of key target tracking parameter matching scheme.
Abstract: The high frequency induction heating power supply has received increasing attention from researchers, multilevel converter is a high voltage large power application areas of research focus and core, it solves the problem of the multilevel inverter output voltage waveform adjustment, avoids the problem of two times reversing that the load voltage in the commutation during the dead period occurred. An effective way to improve efficiency is to keep the power device of low voltage stress and less switching loss. A passive lossless snubber circuit is designed for inhibiting the reverse recovery current of diode and improving the turn-on condition of powers switch. The operation process of snubber circuit is analyzed and the parameter design method is given. The results of simulation have verified the validity of design methods and the conclusions given by theoretically analyzing in this paper.
Abstract: In information war, support effectiveness of equipment depends on the ability of information management. Contraposing the main problems of the equipment support management at present, the characteristics of data depot are introduced, and the differences between data depot and traditional affairs database are presented. Necessity for setting up a data depot of equipment support is narrated. The frame and the exploitation process of a equipment support data depot are also studied, scientific evidence is provided in order to improve the equipment support management and establish long-term programming.
Abstract: Feature selection is one of key technologies for fault diagnosis. Especially for high dimensional data, Feature selection can not only find the feature subset with sufficient information, but also improve the classification accuracy and efficiency. In order to decrease the number of diagnosis parameter in fault diagnosis of Liquid-propellant Rocket Engine, the paper proposes one feature selection method based on improved particle swarm optimization, the method applies the quantum evolution thoughts to PSO. The particle is restricted in the range from -π/2 to 0, so the particle can correspond to the quantum angle. The parameter optimization function is designed. The improved algorithm can decrease the number of parameter in fault diagnosis of Liquid-propellant Rocket Engine from 25 to 6.
Abstract: Three-dimensional elastic solution of a simply supported, transversely isotropic functionally graded rectangular plate is presented in this paper. Suppose that all elastic coefficients of the material have the same power-law dependence on the thickness coordinate. By introducing two new displacement functions, three equations of equilibrium in terms of displacements are reduced to two uncoupled partial differential equations. Exact solution for a second-order partial differential equation expressed by one of displacement functions is obtained and analytical solution for another fourth-order partial differential equation expressed by another displacement function is found by employing the Frobenius method. The validity of the present solution is first investigated. And the effect of the gradation of material properties on the mechanical behavior of the plate is studied through numerical examples.