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Academic contents update and learner's capability change over time. But nowadays, academic recommendation system does not take time factors into account. There are two challenges to capture learner's preferences and learning context accurately and dynamically. First modeling academic trend and user's cognitive level transferred by time is a hard problem. And designing dynamic algorithm to improve...
This paper makes a comprehensive introduction to collaborative filtering aiming to facilitate readers to understand this field. Firstly the research background is introduced, including mainstream collaborative filtering applications, research conferences and journals. Then this paper briefly describes the current generation of collaborative filtering that are usually classified into the following...
Links of an end-to-end long lived TCP connection may provide bandwidth with significant variance. In this work, we model and study the effects of variable bandwidth on TCP throughput, taking into account various influencing factors such as random loss of links, buffer size and characteristics of the variable bandwidth in the bottleneck link. Result shows that the variance of bandwidth can severely...
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