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[目的/意义]对社会情景感知计算研究对象、特征及关键技术进行总结和分析。[方法/过程]基于文献调研,以社会情景的概念为出发点,从社会情景感知系统的视角,对社会情景获取、社会情景建模、社会情景推理、安全与隐私四个模块的关键理论和技术进行探讨。[结果/结论]总结社会情景的五个描述维度;论述社会情景感知计算与传统情景感知计算的区别与联系;对比分析社会情景感知计算关键技术的特点和适用性,为社会情景感知计算研究关键技术的选择与应用提供理论依据和参考。 相似文献
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在信息检索背景下,梳理情境的类型,归纳情境信息获取的方式,分析情境感知信息检索的主要实现途径,研究基于情境感知的信息检索相比于基于系统的信息检索所具有的优势,评价当前研究态势与今后发展趋势,指出基于情境感知的信息检索是信息检索重要发展方向之一。 相似文献
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现有图书馆情境感知应用系统评估大多集中于技术领域,或可以客观量化的图书馆实体比较,比如馆体类型、编制、资源投入等;较少从使用者角度评估出发进行研究的。本文对南昌市七所本科院校进行了问卷调查,采用问卷调查方式收集使用者主观评估信息,研究发现学生频繁使用手机却很少访问图书馆移动服务,分析了学生对图书馆开展情境感知服务的有用性及易用性认知,总结归纳了图书馆情境感知服务应用现状,分析当前图书馆开展情境感知服务存在的问题,并提出相关改进建议。 相似文献
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In recent years information technology has been integrated into education to produce a series of trends, beginning with “electronic learning” (e-learning), through “mobile learning” (m-learning) and finally to “ubiquitous learning” (u-learning), which aims to improve learner motivation through overcoming the conventional limitations of time and location. U-learning practices are still being developed, and learners frequently experience difficulty focusing on learning objectives, and effective learning strategy tools are still lacking. This study reports the design of a context-aware astronomy learning system. The system integrates several technologies, including radio frequency identification, wireless communication networks, handheld mobile devices, and databases to help students learn astronomical concepts. Two content modules were developed in the context of natural science education for fifth-grade elementary school students in Taiwan. Indicators of user experience with the system were collected for further phenomenographic analysis, based on four perspectives of the Unified Theory of Acceptance and Use of Technology model to assess learner willingness to use this novel u-learning approach. Results show that ease-of-use and the availability of immediate operational or technical support are key factors in increasing learning motivation and performance. 相似文献
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唐善成 《重庆大学学报(英文版)》2004,3(2):58-62
IntroductionDevicesinpervasivecomputingenvironmenthavesomefeaturessuchaslarge-scale,mobility,alterability;thesefeaturesbringgalacticfrustrationtomanualresourcesconfiguration,resourcesdiscoveryandinter-actionwithresources.Inusers’view,devicesinpervasivecomputingsystemsshoulddisappearintothebackground(i.e.be“invisible”),thedevicesshouldautomaticallybeconfigured,managed,discovered,andusedbyotherdeviceswithaminimumofmanualeffort,notintrudeonusers’consciousness[1,2].Resourcediscoveryandinteract… 相似文献
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近年来,情境感知应用已经成为商务智能领域最为活跃的研究领域之一。通过对最近几年情境感知应用的研究进展进行综述,提出一个4层分类框架,并对其涉及到的概念与理论、情境感知计算以及应用实践等进行比较和分析,概括它们的特点和在实际应用中的效果。最后,针对应用现状对有待深入研究的重点和难点问题进行讨论并提出相关建议。 相似文献
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In recent years, mobile technology has been developing rapidly and has been widely used. There are many successful cases of mobile technology applied greatly in today’s teaching and even combined with sensing devices to overcome the limitations of traditional learning environment. In order to make teaching more diversified, teachers currently treat field trips as one of the major ways to aid traditional classroom teaching. Based on Keller’s ARCS motivation model, this study used the natural disaster section in the sixth graders’ Natural Science-Taiwan subject as an example and application of radio frequency identification (RFID) technology in mobile devices to develop a context-aware ubiquitous learning system to be applied in the 921 Earthquake Museum of Taiwan. With the guide of the system, learners can use mobile carriers to receive content information displayed in the Museum for learning. This study conducted experiment in the 921 Earthquake Museum of Taiwan to explore whether using the system for learning significantly improves learning outcomes and motivation in comparison to traditional navigation learning. Felder & Silverman’s theory of learning style was incorporated to explore whether there exists differences in learning performance and outcome among learners with different learning styles so design and strategies for future teaching system can be improved. 相似文献
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文章提出移动知识管理的情境感知体系结构,分为四个层次:第一层是移动用户或移动代理;第二层是支持JAVA的移动设备;第三层是Contextualizer——智能中间件作为相邻层的连接纽带,它是该体系的核心层,根据用户依赖、技术环境、环境和任务等四种情境要素来解析查询和分析情境;第四层是由不同数据库类型的知识资源组成。四个层次中设备及代理之间交互传递使用户能够通过手持设备与数据库中心进行知识的创造、获取、联系、组织和检索等活动,在任何时间、任何地点都能够得到有效的知识支持。 相似文献
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[目的/意义]旨在深入研究情境信息对用户偏好的影响,提高情境感知推荐的准确性。[方法/过程]提出了基于梯度提升决策树的情境感知推荐模型,根据梯度提升决策树计算情境属性权重,将其与传统协同过滤算法相融合,生成情境感知推荐结果。[结果/结论]该模型可以识别影响用户偏好的重要情景属性,为用户提供个性化推荐服务。 相似文献