电子商务个性化推荐服务过度的解决方案

个性化服务日益成为人们关注的焦点,其中个性化推荐服务也是研究的热点,在个性化推荐服务提供的过程中需要避免服务过度的情况。文中基于Web挖掘技术在电子商务个性化推荐服务中广泛运用,分析了用户兴趣模式构建的过程以及在电子商务个性化推荐服务中的应用。继而从隐私泄露和个性化信息过载角度探讨个性化推荐服务过度的问题。最后提出了通过改进个性化服务过度的挖掘过程、改善用户兴趣模式构建、建立规范和主动提供服务的解决方案。     

普适服务综述

随着技术和市场的发展,电信网和互联网正在走向融合,形成一体化网络,提供的服务也将逐步趋同。普适服务融合了各方面对未来服务的需求和期望,成为超3G、下一代网络（NGN）、下二代互联网（NGI）等研究领域的热点问题。普适服务的概念起源于普适计算和超3G领域,其特征包括普适性、移动性、透明性、质量可控性、个性化、自适应性、主动性、安全性、易用性、多样性、快捷性。3GPP、OMA等标准化组织以及欧盟的超3G研究项目都针对普适服务的不同特征进行了研究。当前普适服务的研究热点包括上下文感知、业务使能等技术。     

基于用户兴趣的个性化Web信息检索方法

针时现有的个性化信息检索系统存在的问题,提出一种新的基于用户兴趣的个性化Web信息检索方法,采用自动隐式学习方式来建立和更新用户兴趣库,采用本体技术来进行语义扩展,从而提高Web信息检索的查准率和查全率.文中给出了个性化Web信息检索系统的体系结构和个性化机制的关键技术及相关算法,全面描述了基于用户兴趣的个性化处理过程.该方法能更好地满足用户的需求,为其提供个性化服务.     

面向个性化服务的用户兴趣偏移检测及处理方法

个性化服务系统的目标是根据不同用户的兴趣喜好为不同用户提供针对性服务,其核心是建立关于用户兴趣的描述,即用户兴趣建模。然而,现实生活中用户兴趣常常发生不可预测的变化,兴趣偏移问题一直困扰着建模技术,阻碍个性化服务系统性能的进一步提高。为了寻找切实可行的方法解决兴趣偏移问题,本文针对用户兴趣建模的兴趣偏移问题进行系统的研究,着重分析了兴趣偏移的检测方法和处理机制,对时间窗口、遗忘模型、长短期模型等隐式调整方法以及主要显式检测方法和技术进行了系统评述,并在此基础上提出了针对兴趣偏移问题的进一步研究方向。     

医疗信息服务应用中情境感知推荐的研究与实现

随着智能手机用户量的不断上升,医疗信息服务逐渐应用于客户端上,同时伴随着医疗服务信息量的日益增长,移动医疗信息服务应用中出现了信息过载和用户访问效率偏低的现象。针对这种情况,对现有医疗信息服务平台在智能手机上的应用进行研究,并根据移动应用中基于地理位置服务的特殊性和LBS推荐系统的特殊要求,提出基于情境信息的医疗信息服务推荐系统框架。通过对获取到的用户位置及当前时间、天气、环境、交通等丰富的情境信息进行分析,使用基于规则的推荐方法以降低计算量,实现在线个性化智能推荐服务。结果表明,融合了丰富情境信息的移动医疗信息服务平台中的推荐,使得推荐更加个性化,更加符合用户需求。     

基于遗传算法的个性化学习系统研究

目前,个性化服务随着互联网的发展已经成为现代远程教育中的一个重要部分,能够为网络上不同层次的用户提供个性化需求是它的最大优点。文章提出了一种基于遗传算法的个性化学习系统,充分利用了遗传算法应用简单、全局搜索能力强等特点,帮助提高学习效率。学习系统模型会随时收集学习过程中的个性化动态数据,实现学习内容的个性化进化。     

普适计算中一种上下文感知的自适应可信模型

针对普适计算环境中涌现出的行为可信问题,提出了一种适合于普适计算网络环境的上下文感知的自适应可信模型CASATM,该可信模型能够自适应地对不同的服务提供不同层次的安全保障,能有效地对时间、地点、服务内容等上下文感知.同时提出了一种简单高效的风险评估模型来完成对一些完全陌生客体的可信度初始化.仿真实验表明该可信模型能有效地感知上下文并抵抗恶意客体的周期性欺骗行为.     

数字图书馆个性化搜索引擎的用户建模

网络信息的高速增长导致了信息定位与获取的复杂化,通过分析目前网络的信息超载问题,对现有用户模型的表示法和更新技术进行比较,提出了一种以用户行为和用户操作的资料作为数据源,在用户兴趣漂移问题上采用兴趣衰减,即兴趣学习与常用的滑动窗口算法相结合的方法。最后以数字图书馆个性化搜索引擎中的用户建模系统的设计与实现为例,先后通过与普通向量空间表示模型的对比实验以及用户兴趣漂移时的跟踪学习,证明算法优化有利于更好地表达用户的兴趣,对提高个性化信息服务的质量有实用价值。     

普适计算在智能通信中的应用研究

本文主要研究了普适计算、云计算及现代主流的通信数据处理技术理论,提出将普适计算技术与智能化的云计算技术应用于DIOS系统中的基本框架,讨论了所运用的拓扑结构关键技术,以期在大数据通信背景下支撑核心的云计算海量数据的分析与挖掘,使通信服务更加精准、个性化,为通信业务有更高质量的服务提供帮助.     

普适计算在智能通信中的应用

本文主要研究了普适计算、云计算及现代主流的通信数据处理技术理论,提出将普适计算技术与智能化的云计算技术应用于DIOS系统中的基本框架,讨论了所运用的拓扑结构关键技术,以期在大数据通信背景下支撑核心的云计算海量数据的分析与挖掘,使通信服务更加精准、个性化,为通信业务有更高质量的服务提供帮助。     

基于客户满意度模型的情景感知旅程规划系统研究

With the development of communication and ubiquitous computing technologies, context-aware services, which acquire contextual information of users and environ-ment, have become critical applications providing customization in mobile commerce. Meanwhile, tourism has attracted increasing attention as a high value-added service and a hot academic topic. However, the research on how to provide tour services based on con-text-aware services is in fact still at an early stage, limited to concept elaboration, service framework discussion, prototype system de-velopment etc. In this paper, we summarized the previous researches on context-aware ser-vices to establish the research foundation, put forward a way of analyzing a tour planning problem with a modified model of Traveling Salesman Problem (TSP) and Vehicle Routing Problem (VRP), and we applied an innovated Resource Constrain Project Scheduling Prob-lem (RCPSP) mathematical model to solve the tour planning problem based on context information. The simulation under branch and bound algorithm evaluated the validity of our solution.     

Contextualized User-Centric Multimedia Delivery System for?Next Generation Networks

Telecommunication and Internet services are constantly subject to changes, seeking the customer??s full satisfaction. Enriching these services with innovative approaches such as context-aware, social, mobile, adaptable and interactive mechanisms enable users to experience a variety of personalized services seamlessly across different platforms and technologies. In this sense, Service Oriented Architectures play a central role in allowing component reuse and low cost service creation. Together with IP Multimedia Subsystem enable the convergence of telecommunications and web services, allowing the network transport technologies to be abstracted from the services above. By integrating these technologies, a number of synergies can be explored. Existing services can be easily enriched with context information, made available on a variety of networks and new services can be composed using previously existing building blocks. This paper explains how this integration can be achieved, and demonstrates the potentialities of this architectural paradigm with a prototype service.     

Protocol architecture for universal personal computing

This paper presents a new paradigm for network computing over the Internet called universal personal computing, where mobile users can access computing resources, network services, and personalized computing environments anywhere using any available terminals. The user and system requirements are defined, and an agent-based protocol architecture required to manage different mobile objects, i.e., users and terminals, in this computing environment is presented. Modifications of connection setup procedures between user application programs to enable addressing based on a global user identity are considered. The use of personal agents to facilitate interworking and management functions is proposed     

Context-aware systems — a primer for user-centred services

Convergence in the telecommunications industry provides an excellent platform and opportunity for new context-aware services. Context awareness, i.e. being able to harvest environmental information and use it to meet or anticipate user needs, is a key enabler for personalised applications and services that will be attractive to users in the future. This paper explores relevant research studies that have been undertaken, and proposes a new architecture for realisation of a context-aware system.     

A survey on identity federation solutions

As Internet is a prime vehicle for business and personal interactions, more and more organizations provide their users with personalized online services. Identity Management is, therefore, a key component for these organizations to manage users’ accounts (i.e. identities) and secure access to their personal services and information. Today, however, users’personal information and authentication are confined to organizations’ boundaries. This brings to a situation where the users have multiple identities on the Internet preventing both users and organizations to benefit from registrations and authentications already done at other organizations. Identity federation becomes, therefore, a key component of identity management enabling authentications and personal information to pass through organizations’boundaries in a privacy-friendly way. This article focuses on Single Sign-On and attribute sharing, two of the main functions Identity Management systems provide. It gives an overview of the main solutions available today.     

基于红外热像技术观察易筋经“托天桩”对颈型颈椎病患者背部经脉的影响

探讨了易筋经"托天桩"对颈型颈椎病患者背部经脉红外特性的影响。对30例颈型颈椎病患者进行"托天桩"的规范化练习,3个月后进行练功前后10 min背部红外图谱的采集。习练易筋经"托天桩"后,可明显诱发督脉的循经红外辐射轨迹,而两侧膀胱经则不明显。大椎穴温度及颈部区平均温度的变化具有显著性差异(P0.01),练功后大于练功前。练功后督脉线上的平均温度大于练功前,温度变化具有统计学差异(P0.05)。结果表明,易筋经"托天桩"可明显诱发背部督脉的循经红外辐射轨迹,使之更连续、规整,并可使大椎穴区、督脉线及颈部区的温度升高。     

HotTown, enabling context-aware and extensible mobile interactive spaces

This article introduces a novel, open, and scalable service architecture for context-aware personal communication. In contrast to the network-centric open service access in third-generation mobile networks, this architecture moves the point of integration for user services out to the mobile devices, where we can create support for context-aware computing and communication. Support for peer-to-peer service negotiation with minimal a priori shared knowledge, context representation, and reasoning about context enables the mobile agents (that represent users and other entities) to be aware of and react to any event and thus context. Hence, the delivery of context-aware applications to users intertwining digital and physical objects in mobile interactive spaces leverages events from sensors, mobility support, and digital entities. Finally, a presentation of our prototype and experiences from the HotTown project demonstrates the feasibility of the approach and provides some examples of the enabled user communication for large-scale mobile networks.     

Pervasiveness in a competitive multi-operator environment:the daidalos project

This article briefly describes the EU-funded Daidalos project, which designs and develops a communications infrastructure for next-generation networks to enable personalized, context-aware, composite services to mobile users. The fundamental concepts rely on federation of operators who create a pervasive environment for service provisioning, on integrated mobility, security, virtual identity for users, and resource management. The project validates concepts by means of specification, implementation, and integration in a large research testbed.     

intGuide: A platform for context-aware services featuring augmented-reality, based on the outcome of European Research Projects

As people become increasingly acquainted with information technology, they demand continuous availability of services related to their work or leisure. The era of ubiquitous computing announced long ago is currently turning into an everyday reality at an ever-increasing pace. Alongside the evolution of ubiquitous and nomadic computing, the need of people to access vast amounts of information in a comprehensive and efficient way gives rise to the areas of information visualization and augmented-reality. Such technologies allow for the comprehensive presentation of visual information equally addressing the needs of different categories of people.

In the past 5 years, we have been active in a set of European Research Projects addressing the above-mentioned research directions, with the long-term goal to develop a software platform that will enable context-aware services deploying advanced visualization technology in a series of application domains, such as cultural heritage dissemination, interactive television and retail industry. The multitude of the application domains addressed, as well as the multidisciplinary expertise necessary to create a generic platform was successfully addressed in complementary research activities. In this paper, we present the idea of a platform for context-aware services by exploiting advanced visualization technology and subsequently we briefly review the research projects that delivered valuable pieces in the overall puzzle. Emphasis is put on the practical issues of the implementation and deployment in different application scenarios.     

基于扩展图规划的Top-K服务组合方法研究

自动服务组合是目前云计算中的关键技术与研究热点.为大规模用户提供多个满足个性化需求的组合服务是当前云环境下自动服务组合中急需解决的问题.提出了基于扩展图规划的Top-K服务组合方法,借助服务索引和增加图规划中的辅助节点,使得经过一次规划搜索即可找到Top-K个满足用户QoS要求的组合服务.实验表明,该方法能够有效提高服务组合的效率,并保证服务组合结果的正确性,更加适用于云计算环境下海量网络服务及大规模用户个性化需求的自动服务组合问题.