MVC在基于Java Applet网管系统的研究与应用

为了提高基于Java Applet的网管系统的开发效率,并使系统各模块间具有松耦合的特点,根据其网管模式的功能特点,将MVC设计模式运用于系统的结构设计,并给出了系统结构模型.该模型将网管系统划分为控制、模型和视图三个层次进行实现,逻辑处理流程清晰,便于扩充维护.最后在此结构模型的基础上,将其应用于一个网络流量管理系统的设计与实现.     

基于移动代理技术的层次化IP网络管理研究

Internet的迅速发展使IP网络环境处于经常性的变化之中 ,IP网管系统应该能适应这种变化 ,具有结构可扩展和功能可扩充、可维护等特性。层次化的IP网管模型可以较好地解决集中式IP网管模型的可扩展性差和管理效率低等问题。在研究了移动代理的迁移、管理和控制技术以及其网管功能扩充方案的基础上 ,基于Tcl脚本语言实现了一个移动代理平台原型系统 ,并以此构建了一个具有移动代理功能的层次化的IP网管系统 ,它使网管工作站能够委托其下级管理者协同完成指定的网管任务 ,系统的网管功能也可以很方便地得到修改和扩充     

网络应用软件监控系统的容错机制

对网络中的应用程序实施管理和监控已成为网管系统发展之必需。在对SNMP中MIB信息和协议数据单元扩充的基础上，设计并实现了面向应用软件的网络监控系统。文章重点阐述了容错机制的设计与实现。     

MVC设计模式在性能管理客户端中的设计实现

根据一个网络层网管系统对性能管理模块客户端的实际需求,运用MVC设计思想,以消息驱动方式作为数据处理流程线索,设计了网络层网管系统中的性能管理客户端模块.这种客户端设计方案不仅使逻辑处理流程清晰,便于今后的扩充和维护,而且可以方便地应用到电信网管系统的其它应用模块客户端设计中.该网管系统已用Java语言实现.     

基于Oracle的网管系统空间数据存储技术

网管系统中的数据存储技术对于网络管理的效率和可靠性具有重要的指导作用．针对网络管理中数据的空间特性和现有的数据存储技术．提出使用Oracle Spatial空间数据库技术实现网管中空间信息与属性信息的一体化存储，并且介绍了在这种存储方法上的空间查询技术，通过结合实际网管图给出具体的存储和空间查询方法，以及具体实现方法的介绍，说明使用这种存储技术的优越性和系统实现的简便性。     

一种基于主动网络的高效的网络管理模型

首先分析了传统网管的各种弊端，然后在研究主动网技术和基于策略管理的基础上．提出了一种基于策略管理的主动式网管逻辑体系结构来实现高效的分布式网络管理．该网管模型集中了主动网技术和策略管理的优点．同时克服了策略管理的缺点；可实现管理策略实施的自动化，管理策略定义和传播机制的共享；为定制动态的网管服务提供了支撑．通过仿真实验表明基于该逻辑结构网管系统不仅能够较好地解决传统网管的弊端，同时在性能方面也有所提高．     

利用移动代理提高网络管理性能的研究

目前针对基于移动代理的网管系统的性能研究较少，且多局限于与传统的集中式网管系统的性能比较．本文致力于提高基于移动代理的网管系统的自身性能．首先分析了现有的基于移动代理的网管系统的性能通弊，然后针对这些缺陷分别给出了解决策略．仿真实验结果表明，将改进后的方案运用在原有的基于移动代理的网管系统后，在一定程度上提高了管理性能．     

利用短信传输网管信息

本文介绍了短信的基本原理、实现过程及其优势和应用；阐述了网管工作的重大意义及出现的问题；提出利用短信系统发送网管信息的设想及实现．最后展望了短信系统的广泛应用前景。     

基于Quartz的网管系统任务调度的实现

网管系统的大部分功能都需要以任务调度的形式实现,介绍了基于Quartz框架的网管系统任务调度的实现方法.实践证明,该方法具有较好的扩展性,在大量任务并发的网管系统中执行效率较高.     

高性能IPv6核心路由器网管系统中MIB模块的实现

MIB是网络管理子系统各功能间的公共接口．是实现整个网络的关键。本文介绍了一种在高性能IPv6路由器网管中实现MIB的方式。讨论了高性能IPv6核心路由器网管系统私有MIB的设计过程，并对实现过程中涉及的MIB编译器的使用和MIB表的存取做了详细的说明。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.