the parameterized mathematical model of double-hinged system has been established . the kinematics and dynamics analysis to the propulsion processe have been established 建立了參數化的兩關節(jié)尾鰭推進模式的數學模型,并對推進過程進行了運動學和動力學分析。
as follow : 1 . two solutions of estimating the doppler centroid are put forward . we processe the doppler centroid estimation in the frequency domain and time domain . also this chapter discusses principle of the doppler centroid estimation 本文主要研究了多普勒參數估計及波數域算法,主要有以下幾個方面:1.闡述了多普勒質心估計的兩種方法:頻域估計法和時域估計法。
to resolve quality defects in mg alloy production, processe s including flux prescription, melting operation and post-treatment are improved . as a results, the quality of mg alloy ingots, especially the surface quality, are improved greatly 為解決鎂合金生產中存在的品質問題,通過對熔劑配方、熔煉操作和后處理三方面生產工藝的改進,使鎂合金錠的品質尤其是表面品質得到了較大的改善。