Recently, use of mobile communicational devices in field data collection is increasing such as smart phones and cellular phones due to emergence of embedded Global Position System GPS and Wi-Fi Internet access. Accura...Recently, use of mobile communicational devices in field data collection is increasing such as smart phones and cellular phones due to emergence of embedded Global Position System GPS and Wi-Fi Internet access. Accurate timely and handy field data collection is required for disaster management and emergency quick responses. In this article, we introduce web-based GIS system to collect the field data by personal mobile phone through Post Office Protocol POP3 mail server. The main objective of this work is to demonstrate real-time field data collection method to the students using their mobile phone to collect field data by timely and handy manners, either individual or group survey in local or global scale research.展开更多
微博作为一种具有代表性的社交新兴媒体,为用户提供实时的、个性化的信息服务,可以让用户从海量信息中快速获取自己感兴趣的、实时的信息.提出一种个性化的实时微博推荐模型(Personalized and Real-Time recommendation model,PRT),为...微博作为一种具有代表性的社交新兴媒体,为用户提供实时的、个性化的信息服务,可以让用户从海量信息中快速获取自己感兴趣的、实时的信息.提出一种个性化的实时微博推荐模型(Personalized and Real-Time recommendation model,PRT),为了提高推荐的效率和准确性,PRT基于LDA主题模型获取用户动态偏好,根据用户偏好把用户分为不同的用户组,为用户组提供整体的局部推荐列表.PRT根据用户上次浏览微博时间t0的不同,为用户推荐从t0到当前时间发布的微博,满足用户对微博推荐的实时、个性化需求.本文使用从新浪微博获取的真实数据验证了模型的高效性和准确性,和算法CT比较,个性化实时推荐模型PRT的准确率提高了10.6%,召回率提高了8.4%,为用户提供了更准确的推荐.展开更多
文摘Recently, use of mobile communicational devices in field data collection is increasing such as smart phones and cellular phones due to emergence of embedded Global Position System GPS and Wi-Fi Internet access. Accurate timely and handy field data collection is required for disaster management and emergency quick responses. In this article, we introduce web-based GIS system to collect the field data by personal mobile phone through Post Office Protocol POP3 mail server. The main objective of this work is to demonstrate real-time field data collection method to the students using their mobile phone to collect field data by timely and handy manners, either individual or group survey in local or global scale research.
文摘微博作为一种具有代表性的社交新兴媒体,为用户提供实时的、个性化的信息服务,可以让用户从海量信息中快速获取自己感兴趣的、实时的信息.提出一种个性化的实时微博推荐模型(Personalized and Real-Time recommendation model,PRT),为了提高推荐的效率和准确性,PRT基于LDA主题模型获取用户动态偏好,根据用户偏好把用户分为不同的用户组,为用户组提供整体的局部推荐列表.PRT根据用户上次浏览微博时间t0的不同,为用户推荐从t0到当前时间发布的微博,满足用户对微博推荐的实时、个性化需求.本文使用从新浪微博获取的真实数据验证了模型的高效性和准确性,和算法CT比较,个性化实时推荐模型PRT的准确率提高了10.6%,召回率提高了8.4%,为用户提供了更准确的推荐.
