新一代移动通信智能网计费系统的设计与实现

从新一代智能网的结构出发,介绍了智能网技术的发展,分析了智能网计费的核心,并给出了一个移动电话智能网计费系统的构建实例。     

用自然坐标分析平面运动刚体上各点的加速度

介绍了用自然坐标分析平面运动刚体上各点加速度的方法,并用该方法直是明地讨论了瞬心的加速度和刚体绕瞬心的转动方程。     

平面多项式系统及其相伴系统

引进平面多项式系统的相伴系统的概念 ,分析了多项式系统与其相伴系统之间在极限环不存在性 ,唯一性 ,中心焦点的判定等问题上的相似之处和不同之处 ,提出了几个公开问题 .     

THE ECONOMICS OF TIMBER SUPPLY: AN ANALYTICAL SYNTHESIS OF MODELING APPROACHES

The joint supply of timber and other services from forest environments plays a central role in most forest land debates. This paper defines a general conceptual model of timber supply that provides the context for discussing both individual harvest choice and aggregate supply models. While the structure and breadth of these models has developed considerably over the last twenty years, unresolved issues remain. Supply formulations that account for the quality and vintage distribution of forest capital will be necessary for improving medium- and long-run forecasts. This will be especially important for examining the potential impacts of structural changes in forest production and timber markets. In addition, consistent aggregation of individual owners to total supply will be required to address changing forest land ownership patterns.     

智能网技术及其展望

本文简略回顾了智能网的发展历史，给出定义，在通信网中的地位及其功能构成。通过增值业务的发展分析，展望其未来的可能技术方向。     

磁卡与IC卡

本文介绍了磁卡和ＩＣ卡及其在通信中的应用，并比较了它们的安全性。     

世妇会IBC电视转播系统设计

本文作者参与了世妇会ＩＢＣ电视转播系统的设计，施工，测试及运行的全部过程，文章详细介绍了系统的总体要求，基本方案，设计及运行，以及由此得出的几点经验。     

Time,Complex Systems,and Public Policy: A Theoretical Foundation for Adaptive Policy Making

Nonlinear Dynamics, Psychology, and Life Sciences - Can public policy development and implementation be improved by closely tracking and coordinating its timing with that of the regulated sector?...     

光纤智能结构中的光纤联接

光纤能以多种不同的构造方式集成并埋入复合材料中来构成可使用的智能结构,但如果没有有效的光纤联接技术,所有的埋入能力和传感器活动就找不到在实际可行的结构中去应用。文章作者对光纤智能结构中光纤互联问题按光纤联接的要求,光学联接法与装置、联接器件设计三方面进行了探讨。     

An optimal service rate in a Poisson arrival queue with two-stage service policy*

We consider a two-stage service policy for a Poisson arrival queueing system. The idle server starts to work with ordinary service rate when a customer arrives. If the number of customers in the system reaches N, the service rate gets faster and continues until the system becomes empty. Otherwise, the server finishes the busy period with ordinary service rate. After assigning various operating costs to the system, we show that there exists a unique fast service rate minimizing the long-run average cost per unit time.This work was supported by Korea Research Foundation Grant(KRF-2002-070-C00021).