两种跟踪低阶模型的模型参考自适应控制方案设计与仿真

采用滤波器降阶和系统分解，并将部分因式看成未建模动态，进而转化成扰动的方法，分别设计了两种高阶系统跟踪低阶参考模型的模型参考自适应控制(MRAC)方案。使用低阶参考模型简化了系统结构。仿真验证了方案的有效性。     

MARKOV DECISION PROGRAMMING-THE FIRST PASSAGE MODEL WITH DENUMERABLE STATE SPACE

In this paper,we discuss MDP with discrete time parameter-the firstpassage model with denumerable state space.Under assumption A in this paper,we prove that an ε(>0)-optimal stationary policy exists.To find an ε-optimalstationary policy,an algorithm of policy improvement iteration and a method ofsuccessive approximations are given.     

日式经营管理在邃变

８０年代引人注目的日式经营管理，９０年代来其许多本质性特征却发生了意味深长的变化。注视并研究这些变化意义甚大。本文重在概括日式经营管理现正经历的变化。     

Application of Mathematial-Simulated Model Setup for Eudcational Planning

ＡｐｐｌｉｃａｔｉｏｎｏｆＭａｔｈｅｍａｔｉａｌ－ＳｉｍｕｌａｔｅｄＭｏｄｅｌＳｅｔｕｐｆｏｒＥｕｄｃａｔｉｏｎａｌＰｌａｎｎｉｎｇＦＵＨｏｎｇｙｕａｎ（ＣｈｏｎｇｑｉｎｇＩｎｓｔｉｔｕｔｅｏｆＡｒｃｈｉｔｅｃｔｕｒｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ）Ａ...     

搜索反应时间服从指数分布时坦克武器系统的射击效率分析

该文探讨了在非对抗和１—１对抗条件下坦克武器系统的射击效率分析问题。该文的特点在于它把坦克搜索系统与火控系统有机地结合起来，提出了评价坦克武器系统效率的指标，并建立了可用于分析坦克（包括携带炮弹数不限、有限和考虑炮弹飞行的情况）搜索系统和火控系统效率参数的数学模型与公式。     

无线异类数据网服务质量体系结构解决方案

设计了一套具有高性能的适合于移动数据网（超2．5G）和无线本地区域网（WLAN）组成的综合数据网的网络体系结构，提供基于预留端到端的QoS模型，使用带宽适应算法支持端到端的QOS，提高了系统资源的利用率，减少了呼叫拥塞概率和交接丢包概率，解决了2个系统QoS类不匹配等问题，平衡了2个系统的传输能力。     

数据包络模型的随机性研究

利用最小绝对误差估计和机会约束规划，本文研究了数据包络模型中的随机性问题，建立了一系列线性与非线性规划的数据包络模型。并对模型解的存在和鲁棒性作了讨论。     

论过程控制系统的次优化方法：（Ⅱ）最简控制功能模块替换的次优化

利用低阶模型替代高阶模型，并以此为依据设计最优状态调节器，这经常是以ＰＩＤ及其组合与替换的形式出现。本文提出这种结合最常用的方式是Ｐ－ＰＩ，ＰＩＤＡ－ＰＩＤＢ以及ＰＩ－Ｉ的组合，并指出其适用的对象特性。     

Experimental and Parametric Design of Petroleum Back-pressured Hydraulic Impactor

Percussive-rotary drilling technology was considered many years ago as one of the best approaches for hard rock drilling. It is a key for popularizing this technology on a large scale to design and make an impactor with excellent performance. This paper presents a suit of method to design the percussive parameters for the oil or gas field by introducing the working principle of back-pressured impactor, dividing the working periods of impactor into three phases and establishing the computer emulational model of percussive parameters. It draws a comparison between the results of model calculation and experiment on the basis of analyzing the experiment results of impactor. The conclude provides credible foundation for designing and further ameliorating the impactor.     

Forecasting recessions using the yield curve

We compare forecasts of recessions using four different specifications of the probit model: a time invariant conditionally independent version; a business cycle specific conditionally independent model; a time invariant probit with autocorrelated errors; and a business cycle specific probit with autocorrelated errors. The more sophisticated versions of the model take into account some of the potential underlying causes of the documented predictive instability of the yield curve. We find strong evidence in favour of the more sophisticated specification, which allows for multiple breakpoints across business cycles and autocorrelation. We also develop a new approach to the construction of real time forecasting of recession probabilities. Copyright © 2005 John Wiley & Sons, Ltd.