Constructing global view with an ontology-based method for information sharing in the virtual organization

1 .INTRODUCTIONTo be constantly adapted to the ever-changing,fiercely competitive business environment not only tobe successful but also to survive ,organizations todayhave to federate with each other to forma virtual or-ganization. Two factors are very i mportant for thevirtual organization to compete in the fast-paced in-formation age . One is the successful cooperationamong the organization units ,the other is the quickreaction to the environment change , where the effi-cient andeffecti…     

Improved filtered-ε adaptive inverse control and its application on nonlinear ship maneuvering

The drawbacks of common nonlinear Filtered-adaptive inverse control (AIC) method, such as the unreliability due to the change of delay time and the faultiness existing in its disturbance control loop, are discussed. Based on it, the diagram of AIC is amended to accommodate with the characteristic of nonlinear object with time delay. The corresponding Filtered-adaptive algorithm based on RTRL is presented to identify the parameters and design the controller. The simulation results on a nonlinear ship model of "The R.O.V Zeefakkel" show that compared with the previous scheme and adaptive PID control, the improved method not only keeps the same dynamic response performance, but also owns higher robustness and disturbance rejection ability, and it is suitable for the control of nonlinear objects which have higher requirement to the maneuverability under complex disturbance environment.     

Comparison of the Teaching Concepts between Chinese and Americans

This paper makes a comparative study on higher education in respect of four aspects in educational system between China and America,in the hope of finding reasons that can be useful to our cultivation in China.     

基于分布式自治软构件的C~4 ISR效能分析建模

对C4 IRS效能的评估 ,仿真是一个最重要的手段。但C4 IRS系统中的元素多 ,相关性多 ,较难描述。本文提出了用自治对象描述C4 IRS系统 ,提出了一个自治对象的分析建模方法。在这个方法中 ,我们将仿真分为两层 ,下层是对仿真的要素进行建模 ,产生自治对象。自治对象的静态结构和行为模式下因环境的改变而改变 ,以支持最大限度的可重用 ,并可以通过组装这些预制对象来建立仿真想定。上层则通过组合预制对象并定义交互 ,以搭积木的方式建立仿真系统和想定。最后 ,用分布式软件来实现各个自治对象 ,实现用软件构件进行仿真。     

用子结构灵敏度综合法优化设计重频约束下的结构

本文提出结构优化的一种广义优化准则法，分别把Chen的优化准则法和Heo的子结构灵敏度综合延伸到重特征值场合，并借助设计向量的广义变分改进了Czyz的方法．     

潜科学思想方法与现代管理者的思维方式

论述了潜科学思想方法以及潜科学在科学成果管理及科学人才培养方面中的应用。     

N维谐振子和N维氢原子的联系

本文对谐振子和氢原子(N维)的联系作了一般讨论,通过求解N维谐振子的能量本征方程,利用适当变换,由N维谐振子的能级和波函数导出N维氢原子的能级和波函数。     

磁控溅射枪的设计与应用

本文论述了磁控溅射枪的基本设计原理,分析确定了枪的电、磁参量和主要结构参数,并给出了枪的性能测试曲线。     

单片双微机系统的程序设计方法

本文介绍了MCS-48单片微机系统的主程序、外部中断处理程序及片内定时中断处理程序的设计方法。并介绍了利用8243扩展口进行双机通讯的软、硬件设计方法。