基于第三方控件动态报表打印控件的设计与实现

传统的报表打印功能在系统开发时就已定制好，不同系统不能共享报表的设计。本文从面向对象的角度出发，将报表划分成五个部分，并对报表建模，然后利用ActiveX控件技术把对象模型实现为动态报表打印控件。只需在系统设计阶段引用控件，并通过可视化的界面简单地把数据源绑定到控件上，就可快速设计出用于打印的报表，从而达到报表设计复用的目的，同时也能提高系统的开发速度。     

远程实时监视电路系统的设计

介绍了一种远程实时监视系统的接口电路。主要包括视频切换、视频转换及控制电路等部分，配合相应软件可完成多路视频信号的计算机输入及远程图像传输。具有成本低、实用和多功能处理等特点。     

Non-Uniform Traffic Issues in DCA Wireless Multimedia Networks

Wireless networks that utilize dynamic channel allocation (DCA) are known to perform better than those with fixed channel allocation, in terms of the call level QoS measures such as the handoff dropping probability. On account of this, the DCA networks are usually designed without the call admission control (CAC). However, given the decrease of cell sizes, together with ever increasing mobile phone and terminal population, dynamic channel allocation policies (such as channel borrowing) may not be sufficient to cope with the hot-spot area size and its traffic intensity. This paper analyses the performance of the DCA networks, both with and without the call admission control, under the hot-spot traffic regime. In such cases, the pure DCA approach fails to ensure sufficiently low level of QoS in both the hot-spot area and the surrounding cells. We propose a CAC policy that can stabilize the QoS under non-uniform traffic, whilst being easy to integrate in the distributed DCA policies.     

EPON中上行时隙的动态分配

根据以太网数据包具有变长性的特点,描述了在以太网无源光网络(Ethernet Passive Optical Network,EPON)系统中局端光线路终端(Optical Line Terminal,OLT)根据终端用户的实际需求,动态分配给各个光网络单元(Optical Network Unit,ONU)上行时隙。动态时隙的分配能充分利用上行信道,大大减少了因为变长数据包不能完全适合固定时隙而带来的带宽浪费。     

自相似业务下视频服务器的接纳控制

VOD 系统中,有限的磁盘 I/O 带宽或缓存空间往往成为系统的瓶颈。针对这一问题,提出了自相似业务下视频服务器的接纳控制算法。该算法运用等效带宽理论,通过在线测量系统所剩资源和周期容限的幅度变化来实时调节调度周期的大小,使得系统所剩资源达到动态的“等量”平衡。仿真结果表明,该算法不但简化了接纳过程,节约了系统资源,提高了算法的可实现性,而且系统的接纳率比 Lee,Yeom 所提算法的接纳率提高了 15%,并且还可根据系统的 QoS 参数灵活调整接纳率。     

一种接收机动态范围的计算方法

讨论了影响接收机动态范围的诸多因素，尤其是杂波干扰环境对动态范围的影响，并从实际工程设计出发，提出了一种接收机动态范围的计算方法。按照该计算方法设计、实现的接收机，其动态范围与理论计算结果吻合，能够满足外场实验要求，效果良好。     

Optimal Release Times in Single-Stage Manufacturing Systems with Blocking: Optimal Control Perspective

This paper concerns a due-date matching problem in a single-stage manufacturing system. Given a finite sequence of jobs and their service order, and given the delivery due date of each job, the problem is to choose the jobs release (arrival) times so as to match as closely as possible their completion times to their respective due dates. The system is modelled as a deterministic single-server FIFO queue with an output buffer for storing jobs whose service is completed prior to their due dates. The output buffer has a finite capacity; when it is full, the server is being blocked. Associated with each job there is a convex cost function penalizing its earliness as well as tardiness. The due-date matching problem is cast as an optimal control problem, whose objective is to minimize the sum of the above cost functions by the choice of the jobs arrival (release) times. Time-box upper-bound and lower-bound constraints are imposed on the jobs output (delivery) times. The optimal-control setting brings to bear on the development of fast and efficient algorithms having intuitive geometric appeal and potential for online implementation.Communicated by W. B. GongResearch supported in part by the National Science Foundation under Grant ECS-9979693 and by the Georgia Tech Manufacturing Research Center under Grant B01-D06.     

动态资产份额定价理论模型

运用倒向随机微分方程数学方法 ,建立了动态资产份额定价理论模型 .这一模型是资产份额定价法的改进 .求解模型得到动态资产份额定价理论公式 ,并得出结论 :资产份额定价公式完全可以作为特例 ,以离散时间意义和在不考虑动态投资的情况下 ,由动态资产份额定价理论公式得到 .     

一类抽象动力系统的C0群性质及其在迁移理论中的应用

本文研究一类抽象动力系统的性质.使用Hilbert空间的分解方法,获得了主算子的谱和相应的群的表示;使用有界线性算子的扰动理论,获得了抽象动力算子的谱分解.作为应用,研究了迁移理论中的一类积-微分方程.     

帧同步电路的设计

帧同步是数字同步复接设备中的重要部分，通过讨论两种常用帧同步方法的工作原理及优缺点。针对使用普遍的置位调整法，说明了其工作原理。采用自上而下的设计方法。在MaxPlusⅡ开发软件上设计实现了帧同步电路。