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传统基于网络的位置服务系统主要是为远程用户提供查询移动对象位置的信息服务。而现有基于移动终端的位置感知服务不能满足位置上下文应用的要求.为了达到系统自动自发的上下文交互目的。需要在应用中定义一个位置检测代理来捕获移动设备的位置变化事件.生成有效的上下文信息.本文使用简单贝叶斯分类算法实现了基于无线局域网的临近位置检测代理.在室内环境中进行实验表明。该方法可根据实际需要调整位置检测的范围与准确度。具有可行性与灵活性. 相似文献
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基于空间公平的混合发言权控制策略 总被引:1,自引:0,他引:1
在基于位置的协作过程中,用户分散在协作区域的不同位置,及时了解协作区域各个位置的上下文对协作的顺利进行具有很重要的影响.因此,用户在使用交互协作系统进行信息交互时,必须考虑到用户的发言权在空间上的公平性,使得协作区域中不同位置的用户均有公平的机会报告本地的上下文变化.而现有的发言权控制策略没有考虑发言权在空间上的公平性.首先,提出了发言权四叉树记录历史发言权分配的空间分布情况,并据此构建了发言指数判断用户发言权请求的空间优先权.然后,提出了一种基于空间公平的发言权请求排序算法,并把这种算法应用到发言权混合 相似文献
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基于上下文的普适计算角色访问控制模型 总被引:1,自引:0,他引:1
针对普适计算访问控制上下文感知的特点,分析了现有扩展RBAC模型的不足,提出了基于上下文的角色访问控制模型(CRBAC).模型定义了可执行角色集,引入由时间状态,位置信息、用户信任值组成的上下文信息,由上下文信息激活可执行角色集,并以此代表用户最终获得的权限,这样用户就只能在一定的上下文中才可以执行某个角色的某个权限,实现了细粒度的动态授权.然后分别对此模型下单用户和多用户的访问控制过程进行了描述,最后利用有限状态机验证了模型的安全性. 相似文献
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针对图卷积编码器提取用户、项目信息过程中权重共享,不能区分邻域之间重要性,以及知识图谱作为辅助信息时,基于图神经网络方法无法显示对知识图谱非本地上下文(最相关的高阶邻居集合)信息进行捕获的问题,提出一种基于双向交互图传递的图注意编码器框架,显示利用知识图谱本地(一阶邻居集合)和非本地上下文信息。通过图注意编码器获取用户、项目的嵌入向量;考虑用户对实体的个性化偏好,通过特定于用户的图注意机制来捕获知识图的本地上下文信息;使用随机游走抽样提取实体的非本地上下文,并使用递归神经网络建模实体与非本地上下文实体之间的依赖关系,通过一个双线性解码器重建二部图中的链接。与现有的方法相比,在真实数据集上的实验结果验证了该模型的优越性。 相似文献
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将ZigBee无线个域网和Android智能平台联合起来进行研究,并设计出一个便于维护的智能移动监控系统。它具有稳定性强、可靠性高、扩展性好等优点,能够广泛地应用于工业、农业和服务业等各领域。系统采用CC2530和S3C6410等高性能处理器构建硬件平台。数据的传输采用ZigBee协议,人机交互程序在Android平台上开发,能实现环境信息的实时显示和用户控制命令的及时响应。 相似文献
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为满足新一代运载火箭地面测发控系统通用化需求,减少平台研发、测试和维护成本,设计并实现了一种基于SpringBoot的运载火箭信息交互指挥平台,平台集成了信息交互、参数监测、数据判读及存储等功能,为指挥和判读人员提供了一种高效、便捷的工作方式。平台在满足业务需求的基础上,实现了软件自动化和国产化,减少了软件部署、移植的人工成本。经过试验表明该平台能够适应某系列运载火箭测发控系统的测试流程,实现了运载火箭地面数据的监测和判读,为测发控类软件一体化设计提供了一定的参考价值。 相似文献
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《Information & Management》2016,53(6):817-831
Although mobile technologies are increasingly used for business purposes, many companies have found it difficult to successfully implement them. Not only do the rapid technological changes increase the risks of companies’ investments into mobile technologies, but many such applications have also failed to gain user acceptance. In contrast to the consumer domain, there are very few empirical studies of mobile applications’ effectiveness from the perspectives of professional end users. Furthermore, designing mobile business applications has become an increasingly iterative and incremental activity, and ex post evaluations by actual users can provide crucial feedback to an iterative design process. In this study, we seek to contribute to establishing a design cycle that closely links the building and the evaluation of mobile business applications. Our objectives are to (1) gain a better understanding of mobile business applications’ success by means of ex post evaluations from end users, and to (2) leverage these empirical insights to inform the design of mobile business applications. We conducted the study in collaboration with DEKRA Automotive, which offers expert services in the automotive sector with experience in mobile business applications. Our primary contribution is a systematic approach to using ex post evaluation as input for the iterative design of mobile business applications. We suggest an adapted version of the D&M information system (IS) Success Model, which has process quality as an additional construct, as a basis for ex post evaluations of a mobile business application by its end users. Furthermore, we illustrate how a performance-based analysis of the empirical results enables one to derive priorities and recommendations for future design iterations. Our results reveal that system quality and process quality are the main determinants of individual benefits of using mobile business applications. Our findings thus contradict other studies that identify information quality as a significant motivator of (consumer-oriented) mobile data services. We conclude that a mobile business application's design should focus on process quality, emphasizing functional support for operational tasks in a specific work context while ensuring system quality, which is largely affected by technology platform choices. 相似文献
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随着信息技术的发展进步,使得中学教学资源的进一步丰富,多媒体技术应用于中学课堂已成为普遍现象,甚至有替代传统教学手段成为主流的趋势。运用信息技术的利弊被一线教师及教育者广泛讨论,利大于弊,但需要老师结合具体教学内容,这一观点也得到大多数人的认可。本文以中学历史教学为例,简析运用中学信息技术的利弊。 相似文献
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Francis Bidault Jos De La Torre Casimir De Rham Michelle Sisto 《Creativity & Innovation Management》2007,16(3):317-329
This paper is concerned with understanding and identifying factors that affect the willingness of business executives to rely on trust as a governance mechanism in the context of partnerships. An instrument was designed (a short business case study followed by a questionnaire) to collect data on how different executives react to the objective conditions of a business deal. Through the questionnaire, individual willingness to rely on trust, individual reaction to traditional types of trust, and sensitivity to other situations that evolve during the deal were measured. It is shown that willingness to rely on trust varies amongst executives and is not fully determined by the conditions of a deal. Furthermore, consistent with a psycho‐sociological approach to trust, it is also shown that demographic factors are related to propensity to rely on trust, and that across nationalities, the sensitivity to factors affecting trust such as partner interaction and external information differ. 相似文献
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基于SOA的邮政物流信息系统规划 总被引:3,自引:0,他引:3
研究利用SOA技术思想和体系结构,设计基于SOA的邮政物流信息系统规划方案,介绍SOA的概念及体系架构优点,分析邮政物流信息系统现状存在的问题,提出基于SOA的邮政物流信息系统规划设计思想,给出基于SOA的总体构架,并对该体系下的主要构建模块和业务流程服务功能进行了阐述. 相似文献
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基于WiFi和体感交互的演示系统设计与实现 总被引:1,自引:0,他引:1
基于智能手持终端系统内置的三轴陀螺仪捕获手势命令,利用自适应模板匹配方法进行手势识别,在不降低识别率的情况下,提高了识别效率。以WiFi网络作为信息传递载体,将手势命令传输到服务器,以控制演讲时幻灯片的放映。这种基于WiFi和体感交互的演示方式,能克服传统USB激光笔操作方式单一、接收距离有限等问题,提供更好的用户体验。 相似文献