Mechanism and Defense on Malicious Code

With the explosive growth of network applications, the threat of the malicious code against network security becomes increasingly serious. In this paper we explore the mechanism of the malicious code by giving an attack model of the maliciouscode, and discuss the critical techniques of implementation and prevention against the malicious code. The remaining problems and emerging trends in this area are also addressed in the paper.     

基于OBDD时序电路设计的验证

依据有序二叉判定图（OBDD）和计算树逻辑（或称分支时态逻辑）CTL（Computational Tree Logic)的基本原理，分析了基于OBDD和CTL的验证数据电路设计的基本原理，并在此基础上，给出了时序电路等价验证的方法。     

Study on End Milling Generation Surface Model and Simulation in View of Main Axle s Tolerance

In accordance with the relative movement between end-milling cutter and workpiece surface, a theoretical generation model for milled surface was established with the movement error of principal axle considered. Then the milled surfaces under various cutting condition were simulated, the results of which showed that end milled surfaces were of “vaulted profile“, heights of surface irregularty at various points to be different with maximum value in the middle and smaller at both sides, the difference were ...     

Duane模型、分组数据的AMSAA模型和具丢失数据的AMSAA模型——Bayes分析方法

本文将Bayes分析方法应用于Duane可靠性增长模型、分组数据的AMSAA模型和具丢失数据的AMSAA模型,得到了参数以及系统能达到的MTBF的Bayes点估计和Bayes区间估计。     

济南市农村土地整理模式与措施探讨

针对济南市农村土地利用现状，分析总结出了济南市农村土地整理的基本模式，包括农村居民点，农田，废弃地，未利用土地整理，并提出相关的包括发挥政府的主导作用，制定各项条例法规，建立土地整理开发专项资金，加大土地整理相关法规的宣传等措施。     

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

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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。