the National Natural Science Foundation of China (Grant Nos. 60642007 and 10374051);the Scientific Fundation of Guangxi Education Department of China (Grant No. [2002]316)
Energy conservation is a critical problem in recently-emerging wireless sensor networks (WSNs). Pulse position modulation (PPM), as an exploring-worthy modulation format for energy efficiency, is tailored for WSNs...
This work was supported by the National Natural Sciences Foundation of China (10374051).
Piezoelectric loudspeakers have been used in thermoacoustic refrigerators for operating at the high frequency to miniaturize the system. Then the coupling between the piezoelectric loudspeaker and resonance pipe becom...