Feedback control on Nash equilibrium for discrete-time stochastic systems with Markovian jumps: Finite-horizon case

In this paper, we consider the feedback control on nonzero-sum linear quadratic (LQ) differential games in finite horizon for discrete-time stochastic systems with Markovian jump parameters and multiplicative noise. Four-coupled generalized difference Riccati equations (GDREs) are obtained, which are essential to find the optimal Nash equilibrium strategies and the optimal cost values of the LQ differential games. Furthermore, an iterative algorithm is given to solve the four-coupled GDREs. Finally, a suboptimal solution of the LQ differential games is proposed based on a convex optimization approach and a simplification of the suboptimal solution is given. Simulation examples are presented to illustrate the effectiveness of the iterative algorithm and the suboptimal solution.     

H<Subscript>∞</Subscript> Output Feedback Control with Spectrum Constraints for Uncertain Stochastic Systems

This paper considers the problem of H_∞ output feedback control with spectrum constraints for a class of uncertain stochastic systems. The purpose is the design of dynamic output feedback controllers such that the closed-loop system is asymptotically mean-square stable with a specified stability degree and an H_∞-norm bound. First, the concept of spectrum for stochastic systems is redefined, and some characterizations about the stability degree are presented. Then, several equivalent conditions for the existence of H_∞ dynamic output feedback controllers are obtained, and the explicit expression of a desired controller is provided. Furthermore, by using the cone complementarity linearization iterative algorithm, a detailed design algorithm is proposed. Finally, an example is given to show the effectiveness of the proposed method.     

粉末粒度对Ti(C,N)基金属陶瓷制备工艺及其组织性能的影响

综述了粉末冶金法制备Ti(C,N)基金属陶瓷过程中粉末粒度的作用,以及其对材料最终组织性能的影响;并指出了原始粉末粒度与细晶粒Ti(C,N)基金属陶瓷制备工艺的关系及其研究意义。     

铂电阻高精度非线性校正及其在智能仪表中的实现

以铂电阻分度函数为基础,给出了２种高精度非线性校正的算法,其结果已在智能仪表中得到应用,并达到良好的效果。     

Comparisons of dosimetric properties between GD-300 series of radiophotoluminescent glass detector: and GR-200 series of thermoluminescent detectors

In order to compare the dosimetric properties of two kinds of solid state detectors used for monitoring external exposures,experiments Were performed for the GD-300 series of radiophotoluminescent glass detectors (RPLGD) and the GR-200 series of thermoluminescent detectors (TLD).X-rays and 137 Cs and 60 Co γ-rays were used to irradiate the RPLGDs and TLDs,their dose linearky,uniformity/reproducibility of signal,fading effect and energy dependence were compared.Both kinds of the detectors have generally good dosimetric properties.The dose linearity and energy dependence of the GD-351 dosimeters and the TLDs are nearly the same,but the RPLGD is much better than the TLD in terms of the uniformity and fading effect.     

Research of Tb:Mo:PbWO4 Crystal Structure by Raman Spectra

The structure of TbMoPbWO4 crystals was investigated by Raman spectra and the results showed that the spectra were varied differently by doping dopants in different ranges of shift. Rotation-vibration, curving-vibration and non-symmetrical stretching-vibration had been investigated on the spectra. Rotation-vibration intensity of [WO4]2- group is weakened and curving-vibration intensity is undergirded; low Mo6 doping enhances the intensity of non-symmetrical stretching-vibration, with the concentration of Mo6 increasing, the intensity is weakened. So it could be inferred that Tb3 ion replaced the vacancy of Pb, when achieving at a certain concentration, Tb3 ion would substitute for the lattice of Pb2 , Mo6 ion would substitute for W lattice and generate [MoO4]2- new group, these are the main reason for the properties changing. Furthermore it could suggest that the impurity ions doped in tetrahedral positions, strongly affect the electron-phonon coupling in [WO4]2-, which makes the intensities of the vibration changed regularly.     

A NEW FREQUENCY SELECTIVE SURFACE COMPOSED OF LEFT-HANDED MATERIALS

The frequency selective characteristics of a new dielectric periodic structure composed of left-handed materials (LHM) are carefully studied by a method which combines the multimode network theory with the rigorous mode matching method. The variations of the frequency selective characteristics with structure parameters and dielectric loss are presented and comparisons for the frequency selective properties between RHM and LHM gratings are also shown with some explanations. Guidelines for accurate design of the LHM dielectric frequency selective surface are given.     

光纤阵列式触觉传感器模型的研制

本文提出了用于机器人物体分类系统的光纤阵列式触觉传感器的设想.按优化设计理论为探头设计了实现阵列扫描的八路转换开关.最终制造了2×4光纤阵列触觉传感器的模型,用多帧图形拼接法得一长方形的二元图象.     

浅析浮充电压的影响因素

通过测量阀控式铅酸蓄电池正、负极的镉压 ,判断浮充电压均匀性差的主要原因是由于负极电位的不均匀引起的。同时分析了影响负极电位漂移的主要因素以及消除这些因素的措施。重点阐述了气体复合效率对VRLA蓄电池组浮充电压的影响