Yifeng Shao

Learn More
Using directional antennas to conserve bandwidth and energy consumption in ad hoc wireless networks has attracted much attention of the research community in recent years. However, limited research has focused on applying directional antennas to broadcasting. We devise a link reduction (LR) based broadcasting protocol for ad hoc wireless networks using(More)
Critical infrastructure systems are important systems that support our daily lives. Protecting these systems is attracting attention from the research community. The key component of a critical infrastructure system is the process control system, also known as the supervisory, control, and data acquisition (SCADA) system. On the other hand, security(More)
Research on delay tolerant networks (DTNs) has brought about a plethora of routing algorithms targeted at networks with different mobility patterns. However, few research works have been done towards developing methods to understand certain characteristics of DTNs, especially those with predictable characteristics (e.g., predictable mobility). As a step(More)
Many previous works of data mining user queries in peer-to-peer systems focused their attention on the distribution of query contents. However, few has been done towards a better understanding of the time series distribution of these queries, which is vital for system performance. To remedy this situation, this paper mines query steams by using automatic(More)
Using directional antennas to conserve bandwidth and energy consumption in ad hoc wireless networks has attracted much attention of the research community in recent years. However, limited research has focused on applying directional antennas to broadcasting and the load balance in broadcasting. Taking the load balance into consideration, we devise a link(More)
Recently, some systems allow users to rate and annotate resources, e.g., Movie Lens, and we consider that it provides a way to identify favor tags and annoying tags of a user by integrating user's rating and tags. In this paper, we reveal and elaborate on the limitations of current works on user profiling for personalized search in collaborative tagging(More)
The variance of job size is a significant factor for designing peer-to-peer system which leads to the born of JSChord(Job Size based Chord). JSChord is a peerto- peer overlay constructed on Chord aimed to exploit the variance of job size. The fundamental idea of JSChord is to group several Chord rings together to distribute the jobs according to their size.(More)
  • 1