群體減速 的英文怎麼說
中文拼音 [qúntǐjiǎnsù]
群體減速
英文
mass slow-
Electromagnetically induced transparency and slow group velocity in pr3 y2sio5 crystal
晶體中電磁感應光透明及群速度減慢Generally speaking, the high group velocity and low attenuation factor and high qr in the same area, but relatively low group velocity and high attenuation factor and low qr in the same area in china is the general distribution
在不同周期，面波衰減系數或品質因子在整個中國大陸區域分佈是不均勻的；總體表現為高群速度分佈的區域呈現高叢和低衰減系數、低群速度分佈的區域呈現低叢和高衰減系數分佈的特點。The theory analysis and experimental results show that the algorithm not only effectively keeps population diversity, but also alleviates the undulate phenomenon in evolutionary latter stages meanwhile increases the convergent speed greatly
理論分析和模擬結果表明，該演算法不僅能夠有效地保持群體多樣性，而且減輕了遺傳演算法的後期波動現象，同時收斂速度明顯提高。Based on the results of present investigation, by theoretic analysis and physical model experimentation and numerical experimentation, the deeper research for flow deceleration through frames made of hollow tetrahedrons is carried out
本文在現有研究成果的基礎上，通過理論分析、物模試驗、數值實驗等研究手段對空心四面體框架群的減速特性進行了較為深入的研究。( 3 ) through dimension analysis, factors that affect the flow deceleration through frames are discussed. based on flume experiments, this study indicates the velocity near the bed decreases as the l / h increases, and the l / h decreases, the influence of frames height on the effect of velocity near the bed is not distinct ( 4 ) by 2 - d mathematical model, patterns of flow through frames are analyzed and the influence of different frame formations on the protection zone is researched, mean velocity in vertical decreases and protection zone enlarges as the l / h, b / b and a / h increases
（ 3 ）通過因次分析，探討了四面體框架群減速率的影響因素，並進行了系列水槽試驗，得出：近底流速的減速率隨框架群相對長度l h的增加而增加，隨框架群相對間隔距離l h的增加而減小；框架群高度對近底流速的減速率影響不大，框架群高度的增加主要表現為減速區的增高。分享友人