中间件技术在TMN中的研究与应用

电信网络的迅猛发展,对电信网络管理的构建提出新的挑战。基于分布式对象计算中间件技术,为TMN带来有效的解决方案。对中间件技术,尤其是CORBA技术进行了简明的阐述,通过对TMN的体系结构和当前状况、TMN发展中的不足进行分析,将CORBA技术与原有TMN中OSI底层信息模型有效结合,提出了一种基于CORBA技术的混合TMN模型,并对其优缺点进行分析,最后提出将CORBA与Web Services结合的建议。     

CORBA在电信网络管理中的应用

国际电信联盟ITU提出的电信管理网TMN(Telecommunication Management Network)概念,目的在于建立一个具有综合管理能力的网管体系结构对电信网络进行有效的管理.而将CORBA应用到TMN中已成为必然趋势,需要利用CORBA在开发分布式系统方面的优势来构造具有强大功能的综合网络管理平台.阐述CORBA的技术特点和核心概念,并且基于这些技术特点,研究利用CORBA建立分布式网络管理的管理模型.     

CORBA技术在TMN中的应用研究

随着电信网络管理系统的规模和服务种类要求的不断提高，对之进行分布式的网络管理成为现在电信网管的一个重要的发展方向，CORBA技术作为一种流行并且功能强大的中间件技术被广泛地应用到许多领域中。主要对CORBA技术在电信网管领域中的应用进行了研究，提出了CORBA在TMN中应用的一种体系结构，并分析这种体系结构的优势及其存在的问题。     

中间件技术在电信网管中应用的研究

对中间件技术，尤其是CORBA技术在电信网管中的应用做了详细的阐述。提出了一种基于CORBA技术的TMN混合模型，并对存在的问题及解决方案进行了探讨，最后介绍了基于此模型的告警管理系统的实现技术。     

CORBA在TMN性能管理中的应用

随着电信市场的日益开放，被管理的各种网元、与电信业务相关的管理信息以及完成TMN功能的管理实体，在逻辑和物理上都呈分布状态，且处于动态变化之中。基于传统的TMN标准的各种管理应用开始显示出其一定的局限性。为解决此问题，CORBA技术和TMN相结合已经成为一种趋势。在此趋势之下，作为TMN应用模块之一的性能管理也实现了与CORBA技术的完美结合，文中对CORBA技术在TMN性能管理中的应用进行比较探讨，并提出具体的性能应用CORBA模型和简单实现。     

基于多个中间件的TMN研究

本文提出一种基于多种中间件技术综合应用的TMN。利用CORBA、Web服务、SNMP协议实现TMN系统中NML（网络管理层）、EML（网元管理层1、SNMPAgent端的交互,将传统层次概念的TMN改进。包括网元SNMP代理封装成相应的Web服务,CORBA／SNMP网关在TMN中应用,并给出了该方案的设计与实现及相应的结果分析。最后指出了利用基于XML技术的网络管理协议（NETCOND代替SNMP协议,实现网络管理的发展方向。     

CORBA在TMN性能管理中的应用

随着电信市场的日益开放,被管理的各种网元、与电信业务相关的管理信息以及完成TMN功能的管理实体,在逻辑和物理上都呈分布状态,且处于动态变化之中。基于传统的TMN标准的各种管理应用开始显示出其一定的局限性。为解决此问题,CORBA技术和TMN相结合已经成为一种趋势。在此趋势之下,作为TMN应用模块之一的性能管理也实现了与CORBA技术的完美结合,文中对CORBA技术在TMN性能管理中的应用进行比较探讨,并提出具体的性能应用CORBA模型和简单实现。     

基于软总线的TMN技术

CORBA是目前一项比较成熟的分布式面向对象技术,CORBA技术与TMN的结合已经成为现在网络管理技术研究的热点和未来网络管理技术发展的方向.本文通过对TMN和CORBA技术结合方案的研究,提出了几种基于软总线的TMN改进方案.     

基于CORBA的电信网络管理系统实现方法

电信管理网提供了电信网络的管理功能。文章分析比较了电信管理网和公共对象请求代理体系结构的特点，讨论了CORBA在TMN中的应用方式，设计、实现了一个基于CORBA的TMN管理系统，并以其中的故障告警管理功能为例介绍了系统的实现方法。     

基于CORBA/Web的网管系统的设计与实现

根据电信管理网(TMN)的特点分析了采用CORBA技术建立电信网网管系统的可行性。借鉴TMN逻辑分层结构思想,提出一种基于TMN逻辑分层和CORBA互操作机制的网管模型。系统采用“应用层 + 管理层 + 网元层”三层体系结构,使用CORBA技术实现网络管理（性能管理、故障管理、配置管理、计费管理、安全管理）的功能设计。设计完成的网管系统综合运用了CORBA、Web、XML和多线程技术。系统采用了B/S模式,用户使用不受地域限制,且系统易于扩展。     

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。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

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.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.