Qingchuan Zhang

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We investigate two different relay selection (RS) methods for precoded decode-and-forward (DF) cooperative OFDM systems: one scheme is to select the best relays for individual precoding groups (IPG-RS), and the other is to choose a single relay for the entire precoding groups (EPG-RS). We derive their diversity performances from the pairwise error(More)
Ginsenoside Rh2 (GRh2) has been reported to have therapeutic effects on some types of cancer, but its effect on prostatic cancer has not been extensively evaluated. Here, we show that GRh2 can substantially inhibit the growth of prostatic cancer in vivo and in vitro. Moreover, the inhibition of the tumor growth appeared to result from a combined inhibitory(More)
—We report a significant step in the design, fabrication, and performance evaluation of a 240 × 240 microelectromechan-ical system uncooled infrared (IR) focal plane array (FPA) with 42-μm pitch pixels. An improved analytical model has been developed to optimize the design. The optimal key parameters have been verified through experiments, including thermal(More)
In order to improve delivery ratio and reduce average delay and network cost in Delay and disruption Tolerant Network (DTN), This paper puts forward a domain based single copy routing algorithm (DBR) for BirdNet, which is a special DTN based on mobile sensor nodes installed on birds with GPS function enabled. In this algorithm, the GPS position information(More)
At present, the robot embedded system has some common problems as poor closure and dynamic evolution. Aiming at the situation, the paper focused on the improvement of robot embedded system, and set up architecture of robot system whose control center is Appendage SoftMan based on the syncretic mechanism of robot and SoftMan. The paper mainly paid attention(More)
The task coordination mechanism based on Soft Man group is the core basis of the syncretic system composed of robot and Soft Man. In the syncretic system, the structural organization of the Soft Man group and their modes are particularly important in establishing the task coordination mechanism. This paper, therefore, proposes a cooperative organization(More)