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The H.264/AVC standard achieves a much higher compression performance than the present standards of MPEG-1/2/4 and H.261/263. To achieve the highest coding efficiency, the H.264 encoder employs rate-distortion optimization (RDO) techniques to produce the best coding results in terms of both bit-rate..... [更多]
In recent years, indoor air quality has become an important issue in Hong Kong, China and in many other countries. Numerous indoor sources emit a low concentration of volatile organic compounds (VOCs), which cause adverse health effects such as allergic reactions, tiredness, and even cancer. Conside..... [更多]
Speed sensors are customarily used to detect the speed of power electronic driven motors, but that speed sensors could render the motor drive system unreliable. However, there are very few detection devices other than speed sensors that can generate readings when the motor drives are in a resting mo..... [更多]
The ever increasing demands for higher data rate wireless transmission for video conferencing, mobile internetworking and multi-media streaming have driven the employment of complex envelope modulation methods (e.g. WCDMA, OFDM and QAM) in the current 3G and next generation mobile systems. This tren..... [更多]
With their extreme demands, nanocomposite hard/superhard coatings are the high-end coatings in the field of wear resistance applications. The development of next generation superhard coatings should base on appropriate material design to achieve better combined properties. The existing coating techn..... [更多]
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