One of the ways to solve the problem above is actualizing the digital corresponding, transforming the image to the digital signals, wiping off the redundancy outlying of the image quality. Furthermore, on the precondition of ensuring the quality, storaging, recording and transmitting the digital signals is oecumenical, credible and all wool and a yard wide using least bits or bits ratio.

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To obtain good trade-offs between complexity and performance on peak-to-average power ratio reduction in orthogonal frequency division multiplexing using partial transmitting sequence schemes,a trellis structure based PTS factor search method is proposed.

為了得到部分傳輸序列降低OFDM信號(hào)峰均比方案中復(fù)雜度和性能之間的良好折衷人人操人人插人人摸，提出了一種基于格形結(jié)構(gòu)的部分傳輸序列因子的搜索方法。

Especially in designing the planetary transmission with high transmitting ratio , the calculation of this ratio is critical.

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This paper based on universal characteristic curve of truck motor,analyses the optimum seeking method of transmitting ratio of power takeoff in order that power should be taken off according to need and motor should work economically.

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These indexes describe the fabric's thermal properties during the heated process. The heat insulation ratio preferably manifests fabric's insulation property; the difference of calefactive ratio describes dynamic conditions average calefactive case; effective thermal conductivity and compound thermal resistance are mainly considering the wholly testing characteristics and describing the compound thermal property; the response time expresses the time of step response during dynamic testing process. 3. Dynamic heat transmitting properties of fabrics and warmth retention testing methods have been developed; many different textile materials are used for actual test, and the data are analyzed, illustrated, and compared.

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These indexes describe the fabric"s thermal properties during the heated process. The heat insulation ratio preferably manifests fabric"s insulation property; the difference of calefactive ratio describes dynamic conditions average calefactive case; effective thermal conductivity and compound thermal resistance are mainly considering the wholly testing characteristics and describing the compound thermal property; the response time expresses the time of step response duringdynamic testing process.3. Dynamic heat transmitting properties of fabrics and warmth retention testing methods have been developed; many different textile materials are used for actual test, and the data are analyzed, illustrated, and compared.

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Closed epicyclic gear trains possesses many advantages such as light in weight, impact in structure, broad in speed ratio transmission, large in transmitting power and so on.

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In the intersatellite coherent optical communication, the vibration of a satellite will lead to a pointing error of transmitting and receiving antennas, which will decrease the signal-to-noise ratio and increase the bit error rate. In this paper, the Rayleigh distribution is taken as the pointing error model caused by satellite vibration, and PSK homodyne communication scheme is used as an example to analyze the influence of the satellite vibration on the system instantaneous BER and average BER. The simulation calculation result of BER is given.

針對(duì)星間相干激光通信中衛(wèi)星平臺(tái)的振動(dòng)造成發(fā)射天線和接收天線的瞄準(zhǔn)角誤差精品久久久一级毛片，使系統(tǒng)信號(hào)信噪比下降日本亚洲欧美日韩工程，誤碼率增加，該文以瑞利分布作為振動(dòng)造成的瞄準(zhǔn)角誤差模型911影视免费看，結(jié)合高斯本振光和艾里信號(hào)光外差檢測(cè)模型www.十八岁A片，以PSK零差通信體制為例分析衛(wèi)星振動(dòng)對(duì)系統(tǒng)的瞬時(shí)誤碼率和平均誤碼率的影響，給出誤碼率仿真計(jì)算結(jié)果99超碰碰。

The other parts of this thesis are measurements of the transmitting power of the transmitter and voltage standing wave ratio of the antenna in the 5.8GHz communication system.

論文的另一部分工作是5.8GHz通信系統(tǒng)中發(fā)射機(jī)功率和天線駐波系數(shù)的測(cè)量国产精品免费一区二区久久。