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"direction" in Chinese : n. 1.方位，方向；范圍，方面。 2.〔pl.〕指揮 ...
"direction of propagation" in Chinese : 傳播方向
"direction of wave propagation" in Chinese : 波傳播方向; 波浪行進(jìn)方向
"propagation" in Chinese : 持續(xù)培養(yǎng); 傳播，宣傳; 傳播；繁殖；生長(zhǎng); 傳波; 第八章繁殖技術(shù); 繁殖 ...
"direction" in Chinese : n. 1.方位，方向；范圍，方面。 2.〔pl.〕指揮，指導(dǎo)；管理。 3. ...
"in the direction of" in Chinese : 朝 ... 方向; 朝...方向; 朝方向去; 向…方向,在…方向; 向…方 ...
"in this direction" in Chinese : 朝此方向; 朝這個(gè)方向
"in …direction=in direction of" in Chinese : 朝…的方向
"abnormal propagation" in Chinese : 不正常傳播; 反常傳播
"acoustic propagation" in Chinese : 聲傳播; 聲傅播
"acoustical propagation" in Chinese : 聲傅播
"angelfish propagation" in Chinese : 神仙魚式傳輸; 鯊魚楔形傳輸
"animal propagation" in Chinese : 動(dòng)物繁殖
"anogamic propagation" in Chinese : 無配繁殖,無配生殖
"anomalous propagation" in Chinese : 反差傳播; 反常傳播; 異常傳播

Based on the relationship between elastic constants and sound velocities in composite material and measuring very few velocities of different propagation direction , the elastic constant matrix can be calculated out
依據(jù)復(fù)合材料中聲波速度與材料彈性常數(shù)之間的本構(gòu)關(guān)系，測(cè)量不同傳播方向的少數(shù)幾個(gè)聲速，就可以得到其彈性常數(shù)矩陣。
By using bpm , the problem is reduced from a second - order boundary value problem requiring iteration or eigenvalue analysis to a first - order initial - value problem that can be solved by simple " integration " along the propagation direction
和其他模擬方法相比， bpm將二階邊值問題簡(jiǎn)化為一階初值問題，減小了計(jì)算的復(fù)雜性，縮短了計(jì)算時(shí)間，降低了對(duì)計(jì)算機(jī)硬件的要求。
When pure shear wave propagate in anisotropy media , even thought propagation direction is parallel to the direction of aligned cracks , experimental results exhibit that only two kinds of shear - wave velocity can be measured - fast shear wave and slow shear wave neglecting polarization direction
這個(gè)實(shí)驗(yàn)結(jié)果進(jìn)一步表明，純橫波在各向異性介質(zhì)傳播時(shí)，即橫波的傳播方向與裂隙平行，無論橫波的偏振怎樣改變，只能觀測(cè)到兩種橫波速度，快橫波和慢橫波。