downward shift 中文意思是什麼
downward shift
解釋
下移-
The shift downward is more marked among young people.
在青年中下降的趨勢就更加明顯。 -
A hybrid migration method, named " fourier finite - difference migration ", is a post - stack depth migration scheme. the downward extrapolation operator is split into three operators : one operator is a phase - shift operator for a chosen constant background velocity, another operator is the well - known first - order correction term, and the third operator is a finite - difference operator for the varying of the velocity function. phase - shift downward extrapolation and finite - difference downward extrapolation preserves the advantage of phase - shift method and finite - difference method
傅立葉有限差分（簡稱ffd ）偏移演算法是一種疊后深度偏移演算法，其向下延拓運算元是一種混合運算元，包括三項：一項是處理常速的相移運算元，一項是一階相移修正運算元，最後一項是類似45度方程的有限差分運算元，用來處理劇烈橫向變速。 -
Then the general plan of underwater vibrators is put forward. in chapter 3, combining fluid - solid coupling theory and mechanical vibration theory, we get the coupling equation of moving parts and water. the dynamic characteristics of moving parts are studied with theory of finite element, and additional mass of moving parts is found in fluid - solid coupling field, which makes vibrator ' s natural frequency descend and amplitude - frequency curve downward shift
第三章運用流固耦合理論和機械振動學理論相結合的方法建立運動部件與水的耦合運動方程，利用有限元法對其的動態特性進行了研究，得到了在流固耦合場下運動部件存在的附加質量，該附加質量導致固有頻率下降，單位推力下的加速度頻響曲線整體下移。 -
But since 1970, the u. s. and japan have experienced a downward shift in this male - to - female birth ratio, researchers report in the online edition of the journal environmental health perspectives
但據研究人員在環境健康觀察期刊在線版上發表的報告顯示，從1970年開始，美國和日本的男女出生比率開始下降。 -
" the sharp rise in the number and amount of mortgage loans in negative equity in the second quarter is not surprising since it reflects the downward shift in property prices which was aggravated by the sars outbreak, " said mr david carse, deputy chief executive of the hkma
金管局副總裁簡達恆表示：第季負資產按揭貸款宗數及金額迅速增加，並不令人感到意外，原因是爆發非典型肺炎事件令樓價下滑的趨勢加劇。
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