Deploying personalized mobile services in an agent-based environment

The mobile Internet allows users to obtain digitized contents and services from wired and wireless networks virtually anywhere at any time via different handheld mobile devices. However, due to the distinct features of mobile users, mobile devices and wireless networks, deploying mobile services is not as straightforward as generally expected. To ensure the success of mobile services, this paper presents a multi-agent framework that considers different contexts to support personalized services on wireless networks. In the proposed approach, client users, content providers, and service providers are all considered as software agents. They interoperate on the same platform to request and deliver mobile services. The most important issues related to agent operations and context awareness in an agent world are also discussed and analyzed. To verify our framework, different application services are developed accordingly on a publicly available middleware platform. Experiments are conducted for both services to evaluate their corresponding performance. The preliminary results show that our multi-agent approach to personalization is promising and efficient in the deployment of mobile services.     

一个企业内部网络的移动代理平台的设计与实现

实现了一个基于Java语言的移动代理平台。这是一个原形系统，采用中心服务器的结构形式，能够支持简单的分布式应用系统开发。它实现了移动代理平台的核心功能，能够支持代理的装载、移动、运行，实现了移动代理的持续性运行特性，能够提供简单的通信服务。     

基于主从样式的移动代理安全模型的研究与实现

In the ages of current network technology, as a new technology, the emergence of mobile agent shows us a wider and wider application prospect in the fields of network technology, such as Network Management,Intelligence Information Retrieval and Electronic Commence and so on. The security is the essence of mobile agent technology. In this paper we analyze the security issues and survey some representative approaches to solve the problem in mobile agent systems. We focus on the issues about the agent's security and propose a master-slave designpattern based security model for mobile agent called SMAP(Secure Mobile Agent Platform). In the end we give anapplication example to show how to use these.     

基于Agent的智能化学习平台的研究

在传统的基于Web的远程教学系统中,系统按照事先设定的教学策略将课件存储在服务器上,等待学习者点击浏览或下载,学生只能被动地受教而不能根据自身特点选择学习策略,调度、控制学习进度,而在此单一模式下,教师的指导者地位也无法得到充分体现,师生间、学习者间的交互性和协作性差.提出了一种支持四层结构的智能化学习平台的解决方案.重点讨论了智能化学习系统中支持个性化学习的多Agent技术,包括:移动Agent、多Agent特性,个性化学习Agent的功能结构、Agent实现的技术、策略与层次等热点问题.     

A cloud-based platform to develop context-aware mobile applications by domain experts

Context-awareness enables the personalization of computer systems according to the users' needs and their particular situation at a given time. The personalization capabilities are usually implemented by programmers due to the complex processes that are involved. However, an important trend in software development is that more and more software systems are being implemented not only by programmers but also by people with expertise in other domains. Since most of the existing context-aware development toolkits are designed for programmers, non-technical users cannot develop these kinds of systems. The design of tools to create context-aware systems by users that do not have programming skills but are experts in the domain where the system is going to be deployed, will contribute to speed up the adoption of these kinds of services by the society. This paper presents a cloud-based platform to ease the development of context-aware mobile applications by people without programming skills. The platform has been designed to be used in a tourism domain. This way, tourism experts can send tourist information to mobile users according to their context data (indoor/outdoor location, language, and date and time range). An energy-efficient mobile app has been developed in order to obtain context data from the user's device and to receive personalized information in real time based on these data. The architecture and implementation details of the system are presented and the evaluation of the platform by tourism domain experts is discussed.     

移动Agent的平台、通信和标准

介绍了移动Agent(MA)的概念、特点、近年推出的MA平台以及建造平台需要考虑的主要要素 ,同时介绍了MA语言、通信和标准 ,并概括性地给出了应用领域及现阶段存在的主要问题和研究方向     

基于XML的异构环境的Mobile Agents架构

移动Agent技术是集软件Agent技术、移动代码技术、分布式对象技术于一体的技术.移动Agent的编程语言限制了Agent平台的执行环境.然而由于java虚拟机的出现,Java的程序可以不需重新编译,就进行迁移.但是java的移动代理也需要架设平台上有java虚拟机的环境.为了实现一个真正的异构环境的系统,使用基于XML的移动Agent架构,即使用基于XML的移动Agent代码、使用UDDI技术来为Agent注册和查询、Web Services技术来进行通信.它更容易在异构的系统环境中相互通信和操作并更容易实现和在各种环境中得到运用.     

Deploying FIPA-compliant systems on handheld devices

LEAP is a runtime environment for deploying agents on a network of Java-enabled devices. It complies with FIPA international standards for multiagent systems. The Lightweight Extensive Agent Platform project is the first attempt to implement a FIPA agent platform that runs seamlessly on both mobile and fixed devices over both wireless and wired networks     

基于Agent的移动Web服务集成方案

结合Aglets平台和J2EE servlet技术,提出一种基于Agent的J2ME移动Web服务3层集成方案。在终端层,使用轻量级代理接入方式减少移动设备资源受限系统的负载需求。在Web接入层,采用Web服务标准接入方式确保异构移动平台的统一接入。在移动Agent层,通过多Agent协同工作保证系统高效性与灵活性。在此基础上,设计并实现一个移动进货比价系统。应用结果表明,该方案能提高无线环境下J2ME设备发现、访问Web服务的效率与健壮性。     

基于Java的移动Agent系统研究

移动Ａｇｅｎｔ技术是一门新兴的技术,具有移动性,智能性和异步计算等特点,本文介绍了移动Ａｇｅｎｔ概念,分析了一般的移动Ａｇｅｎｔ系统结构,针对Ｊａｖａ语言的特点,分析了Ｊａｖａ语言开发移动Ａｇｅｎｔ优势和几点技术解决方案。     

The ECORA framework: A hybrid architecture for context-oriented pervasive computing

An infrastructure approach to support context-aware pervasive computing is advantageous for rapid prototyping of context-aware distributed applications and beneficial for unifying modelling of context and reasoning in uncertain conditions. This paper presents the ECORA framework for context-aware computing, which is designed with a focus on reasoning about context under uncertainty and addressing issues of heterogeneity, scalability, communication and usability. The framework follows an agent-oriented hybrid approach, combining centralized reasoning services with context-aware, reasoning capable mobile software agents. The use of a centralized reasoning engine provides powerful reasoning capabilities and deploying context-aware mobile agents enables agility and robustness of components in the pervasive system. The design and implementation of the framework at different levels, as well as three case studies, are presented.     

基于JADE的企业商务智能服务代理平台

为解决电子商务平台在异构和分布环境下计算实体的协作和协调、快速有效的信息收集及平台的智能化等问题,提出基于移动Agent在JADE上的企业商务智能服务代理平台体系结构模型和实现方法,给出基于多移动Agent的商务服务竞标算法流程和服务实体的行为交互过程,结合实际的应用验证,表明该服务代理平台系统在实际应用中的可行性与有效性。     

Industrial application integration using the unification approach to agent-enabled semantic SOA

Within the enterprise, information infrastructure as the mean to bring together different software applications is the key component to enable cooperation and information and knowledge exchange in an open-distributed environment. The paper addresses the issues of industrial application integration in business processes using agent-enabled service-oriented architectures (SOA). In this paper, we show that agent-enabled SOA can play an important role for service integration. Our framework combines Web services (WS) and intelligent agent technologies orchestrated by a business process management system. This framework looks for unification of agent and WS service models, is grounded in a semantic SOA of an agent platform and is supported by the Component Agent Platform Over .NET Framework agent platform tools. We describe the architecture and illustrate the approach by an industrial application scenario from petroleum wells’ drilling.     

用于移动计算的软构件模型及其实现

提出了一个可上下文感知的用于移动计算环境的构件模型MCCM。首先讨论了用于移动计算环境的构件应具备的条件,然后提出了MCCM模型及其描述;接着给出了在Linux平台上的一个具体实现,并对这一实现进行了性能测试;最后同当前相关工作进行了对比,并指出了进一步的研究方向。     

MobiPADS: a reflective middleware for context-aware mobile computing

Traditionally, middleware technologies, such as CORBA, Java RMI, and Microsoft's DCOM, have provided a set of distributed computing services that essentially abstract the underlying network services to a monolithic "black box." In a mobile operating environment, the fundamental assumption of middleware abstracting a unified distributed service for all types of applications operating over a static network infrastructure is no longer valid. In particular, mobile applications are not able to leverage the benefits of adaptive computing to optimize its computation based on current contextual situations. In this paper, we introduce the Mobile Platform for Actively Deployable Service (MobiPADS) system. MobiPADS is designed to support context-aware processing by providing an executing platform to enable active service deployment and reconfiguration of the service composition in response to environments of varying contexts. Unlike most mobile middleware, MobiPADS supports dynamic adaptation at both the middleware and application layers to provide flexible configuration of resources to optimize the operations of mobile applications. Within the MobiPADS system, services (known as mobilets) are configured as chained service objects to provide augmented services to the underlying mobile applications so as to alleviate the adverse conditions of a wireless environment.     

Joint contexts optimization for mobile grid

This paper presents joint contexts optimization in mobile grid. The paper describes device context information for context-aware services in the mobile device collaboration. The objective of the paper is to dynamically deliver services to mobile grid users according to current context of mobile grid environment. A utility function is used as objective function that expresses values for the current contexts. The optimization is carried out by the joint context parameter optimizer with respect to an objective function. A joint contexts optimization algorithm is proposed which decomposes mobile grid system optimization problem into sub-problems. In the experiment, the performance evaluation of joint contexts optimization algorithm is conducted.     

信息检索中移动Agent迁移策略的研究

随着互联网的飞速发展,想要获取有用的信息变得非常困。移动Agent是网络信息检索领域的一个新兴研究热点。迁移策略是移动Agent(Mobile Agent,MA)的核心技术之一,MA的效率很大程度上取决于迁移策略的优化。本文利用移动Agent改进遗传算法,提出了一种新的移动Agent迁移策略选择。     

一种基于移动代理的个人移动性结构

提出了一种基于移动代理技术的个人移动性实现方法，设计了一种基于移动代理平台的结构MAPM(Mobile Agent Based Personal Mobility)，有效地实现了移动网络中的个人服务环境的迁移，保证了用户在跨网络漫游时正在使用的服务不间断。     

On the practicalities of place-based virtual communities: Ontology-based querying,application architecture,and performance

While the Internet has allowed geographical boundaries to be transcended, with the increasing use of the mobile Internet, there is a shift towards a focus on locality and place-specific applications. This paper proposes a novel approach for constructing context-aware mobile services for a place using a commonly shared knowledge base, that captures not only static but dynamic aspects of a place. The approach is based on a conceptual model of a Place-Based Virtual Community (PBVC), represented using an ontology; a PBVC for a place augments the place with context-aware services based on querying an ontology. We present an implementation of a framework based on the ontology and an evaluation of the performance of queries over the ontology. We also illustrate architectures of specific applications as specialisation of a generic PlaceComm architecture.