Zhihong Jiang

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Sina-Microblog, the earliest and biggest microblogging service in China, has become one of the most popular media in information propagation. In order to gain insights into the topological and information diffusing characteristics of microblogging network in China, we crawled Sina-Microblog for about 3 months and obtain the trace of its topology and topics.(More)
A new genre of P2P systems, P2P Video-on-Demand(P2P-VoD), has not only received substantial recent research attention, but also been implemented and deployed with success in large-scale real-world streaming systems, such as PPLive. The essential characterization of P2P-VoD systems is to take full advantage of peer upload bandwidth contribution with a cache(More)
This paper introduces a centrifugal impeller-based wall climbing robot “BIT Climber”. First, by statics and dynamics analyses, mechanical parameter optimization directions for general wall climbing robots are presented. A hydromechanical model suitable for all centrifugal impeller-based wall climbing robots' suction system is built, which is(More)
A linear frequency-modulated continuous-wave (LFMCW) synthetic aperture radar (SAR) is a highly miniaturized SAR that is suitable for use on a small unmanned aerial vehicle. In squint stripmap mode, the LFMCW SAR image quality is degraded by the presence of nonlinearities in the transmitted signal, combined with the large bandwidth introduced by the(More)
A boiler maintenance robot which is equipped many kinds of operation devices is proposed. This robot has compact size and can be used to do works of ash cleaning, slag purging, thickness measurement and symbol marking for boiler water-cooling tubes maintenance in one work cycle. The robot can move smoothly on the tube-wall using double magnetic tracked(More)
Recent empirical studies have discovered that many social networks have heterogeneous relationships, which are signed and weighted relationships between individual nodes. To explore the pattern of opinion dynamics in diverse social networks with heterogeneous relationships, we set up a general agent-based simulation framework named opinion interaction(More)
This paper presents a complexmulti-peg-on-hole dockingmechanismused to attach extravehicular experiment loads to a space station and analyzes the challenges of force compliance control for thismechanism. The influence caused by the spring term in impedance control on the complex multi-peg-on-hole docking is analyzed. The analysis shows that the spring term(More)