Xiaoguang Wu

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This paper presents a manageable overlay network architecture <i>SVCP2P</i> for live scalable media streaming. Every peer in <i>SVCP2P</i> periodically exchanges data availability information with one of distributed central servers which act as the centralized index for storing peer list, program list and buffer information of peers. An efficient scheduling(More)
Orthogonal frequency division multiplexing (OFDM) systems encounter performance degradations due to the time varying (TV) channels in wireless environments. As delay spread increases, symbol duration should also increase, and then OFDM systems become more susceptible to time-variations. Time-variations introduce inter-carrier interference (ICI), which must(More)
The adsorption-desorption behaviors of diuron were investigated in six cultivated soils of China. The effect of system pH and temperature were also studied. The data fitted the Freundlich equation very well. The adsorption K(F) values indicated the adsorption of diuron in the six soils was in the sequence of black soil (D)>yellow earth (F)>paddy soil(More)
AIM Emodin showed anti-cancer activity against multiple human malignant tumors by inducing apoptosis. However, the apoptotic inducing effect against human osteosarcoma and related mechanism are still not studied. This study was aimed to investigate them. METHODS Emodin was used to incubate human OS cell U2OS cells at serially diluted concentrations.(More)
This letter studies the mainlobe misorientation problem of the First-Order Steerable Differential Array (FOSDA) in the presence of microphone gain and phase errors, whose response is constructed by a linear combination of monopole and two orthogonal dipoles using a four-element square array. It is shown that the mainlobe orientation of the FOSDA will be(More)
The self-adjusted limit cycle gait, integrating continuous swings with intermittent heelstrike collision, can make a completely uncontrolled and unactuated passive walker walk stably down a gentle slope, only powered by the gravity. However, this natural and high energy-efficient gait is also highly susceptible to its specific variable parameters and any(More)
To propose a synchronous and multi-domain feature extraction method of electroencephalogram (EEG) and surface electromyogram (sEMG) signals is of great significance to power-assist rehabilitation robot control with humancomputer interface (HCI). In this paper, nonnegative Tucker decomposition which is one model of nonnegative tensor factorization (NTF) is(More)
The passive dynamic walking model, which can only depend on the gravity and its own inertia, presents stable, high-efficient, natural periodic gait on a slight slope. The stable periodic gait of the robot has a delicate balance of energy conversion, which makes the gait adjust itself as the parameters of the model change. In our work, the cell mapping(More)