With salient hallmarks of the time,people-topeople diplomacy with Chinese characteristics was proposed against the backdrop of China’s integration with the world as well as the strategic transformation of China’s pe...With salient hallmarks of the time,people-topeople diplomacy with Chinese characteristics was proposed against the backdrop of China’s integration with the world as well as the strategic transformation of China’s people-to-people diplomacy.The establishment of a theoretical system for it conforms to the new situation and new requirements of the times,and is line展开更多
A theoretical analysis of designing an acoustic backscatter system for observations of suspended sediments has been made through a derived sonar equation. Some formulae and data for reference in determining several ma...A theoretical analysis of designing an acoustic backscatter system for observations of suspended sediments has been made through a derived sonar equation. Some formulae and data for reference in determining several main technical parameters of the system, such as optimum frequency, sound transmission power, aperture of transducer etc., airs provided. And some key problems on the acoustic observation of suspended sediments, such as data processing of a time--Varying stochastic process, compensation of sound propagation loss in complicated conditions and in-situ calibration of sediment concentration, are discussed in detail. The results of the analysis could be helpful to the development and application of a specific acoustic backscatter instrument (e.g. the acoustic sediment concentration profiler, the acoustic Doppler current profiler etc.).展开更多
文摘With salient hallmarks of the time,people-topeople diplomacy with Chinese characteristics was proposed against the backdrop of China’s integration with the world as well as the strategic transformation of China’s people-to-people diplomacy.The establishment of a theoretical system for it conforms to the new situation and new requirements of the times,and is line
基金This work is supported by the National Natural Science Foundation of China!(No. 49476273)
文摘A theoretical analysis of designing an acoustic backscatter system for observations of suspended sediments has been made through a derived sonar equation. Some formulae and data for reference in determining several main technical parameters of the system, such as optimum frequency, sound transmission power, aperture of transducer etc., airs provided. And some key problems on the acoustic observation of suspended sediments, such as data processing of a time--Varying stochastic process, compensation of sound propagation loss in complicated conditions and in-situ calibration of sediment concentration, are discussed in detail. The results of the analysis could be helpful to the development and application of a specific acoustic backscatter instrument (e.g. the acoustic sediment concentration profiler, the acoustic Doppler current profiler etc.).
