rayleigh ratio 中文意思是什麼
rayleigh ratio
解釋
瑞利比-
When the frequency approaches zero, the factor approaches zero correspondingly ; 2 ) the amplitude of interaction factors changes with the incident angle of rayleigh waves and reaches maximum when is zero. moreover, with the increase of, the wave period shortens apparently ; ( 3 ) the amplitude of interaction factors decreases as the pile spacing increases and approaches to zero when the pile spacing is 15 ; 4 ) the amplitudes of interaction factors increase clearly with the increasing stiffness ratio of pile to soil ; 5 ) the lat eral seismic response of fixed - head pile groups is much smaller than that of free - head pile groups. moreover, the pile - group effects induced by rayleigh waves can be neglected ; 6 ) the lateral seismic response of piles at different location differs from each other
得到了以下結論： 1 ）樁的相互作用因子隨頻率呈周期性變化，在振動頻率比較低的情況下，樁的橫向相互作用因子也較低，當頻率趨近於零時，相互作用因子也趨近於零； 2 ）樁的相互作用因子的幅值隨瑞利波入射角度的變化而變化，在= 0情況下幅值最大，且隨入射角度的增加，波動的周期明顯縮短； 3 ）樁的相互作用因子的幅值隨著樁與樁間距的增加而減小，至s d = 15時，樁的相互作用因子基本趨近於0 ； 4 ）在頻率比較低時，相互作用因子幅值隨樁土相對剛度比的增加而顯著增加； 5 ）樁頂固接可以有效地降低群樁的橫向地震響應幅值，由瑞利波產生的群樁效應可以忽略不計； 6 ）群樁中不同樁位的樁的橫向地震響應是不同的，每根樁所在的樁位對其橫向地震響應有很大的影響；刀樁數的增加並不能減小樁的橫向動力響應。 -
3. studying still image transmission systems without channel coding or with turbo codes over both awgn and rayleigh fading channels by matlab simulation. simulation results show that turbo codes not only advance the dependability of communication systems, but also reduce channel signal - to - noise ratio ( snr )
將turbo碼應用於靜止圖像傳輸系統，信源編碼採用矢量量化編碼，分別在awgn通道和rayleigh衰落通道下，對不採用通道編碼和採用turbo碼作為通道編碼的各種情況進行模擬。 -
Excess rayleigh ratio
超瑞利比 -
In the thesis domestic and foreign relation model of standard penetration blow count and shearing velocity, standard penetration blow count and deformation modular, shearing velocity and foundation bearing capacity are analyzed. on base of these analysis a new calculation model that applying rayleigh wave velocity to calculate the stress ratio of pile and soil between piles is established. because of the difference of region and soil character, the new model own three branch model, ie, japan model, wuhan model, xia liaohe mo del, in three different conditions
文章通過分析國內外標準貫入擊數與剪切波速、標準貫入擊數與變形模量、剪切波速與地基土承載力之間的關系模型，並考慮到地區性和土質類別的差異，分別選用日本公路橋梁抗震設計新規程模型（日本模型） 、武漢地區模型、下遼河平原模型三種模型建立了新的樁土應力比計算模型? ?應用瑞雷波速求解樁土應力比之間的計算模型。 -
And then, numerical simulation of double diffusive in a square cavity with opposing temperature and concentration gradients is executed. effects of rayleigh number, lewis number and buoyant ratio on flow structure and distribution temperature and concentration are analyzed at large
並以常溫下的水為研究介質的，應用quick格式分析了層流下方腔內雙擴散流動特徵，探討了ra 、 le 、浮力比對雙擴散流動的影響。
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