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In this paper, an energy efficient power allocation approach for amplify-and-forward relay networks is proposed. The proposed method aims to maximize the power normalized signal-to-noise ratio (PN-SNR) while satisfying the constraints of total and individual relay transmit powers. The resultant optimization problem can be solved using Karush-Kuhn-Tucker (KKT) optimality conditions. The proposed method...
The aim of this study was to examine coherence and phase synchronization between antagonistic elbow muscles and thus to explore the coupling and common neural inputs of antagonistic elbow muscles during sustained submaximal isometric fatiguing contraction. Fifteen healthy male subjects sustained an isometric elbow flexion at 20 % maximal level until exhaustion, while surface electromyographic signals...
Based on the high level swimming teams of Tongji University This essay introduces a specific training information system used in swimming which was built by the skill of electrommunication, network communication and database technology. In this system, using the ZigBee transmission technology, a wireless real-time timer technique was adopted and communication master station was used. As a result,...
Objective: The objective of this study is to identify the cycling phase by using surface electromyography(sEMG). Methods: Eight professional cyclists participated in this study. Each subject performed a 30-second all-out cycling exercise. The braking torque imposed on cycling motion was 8% of each subject's weight. sEMG of Rectus Femoris(RF), Biceps Femoris(BF), Tibialis Anterior(TA) and Gastrocnemius...
This essay introduces a specific speed timing system used in cycling, which was built by the skill of electrommunication, network communication and database technology. In this system, a wireless real-time timer technique was adopted and communication master station was used. As a result, timing data can be real-time transmitted, stored and analyzed. Owing to the special-used hardware and software,...
In this essay 11 Shanghai's professional trampoline athletes' pre jump and 5 basic skill movements were analyzed by video and plantar pressure method. Plantar pressure data was acquired. According to trampoline program characteristics, data was analyzed in statistics method and rules of trampoline during the process of touching net were explored. Research result showed that there were no significant...
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