crest length 中文意思是什麼

crest length 解釋
壩頂長度
  • crest : n 1 雞冠；冠毛。2 羽毛飾，（盔上的）飾毛，翎毛，頂飾；〈詩〉盔。3 （山）脊，山頂；（浪）峰，浪頭...
  • length : n. 1. 長，長度，長短。2. （時間的）長短，期間。3. （賽艇的）一艇的長度；一馬的長度。4. 程度，范圍。5. 【板球】球程；投至適當距離的球。6. 【語言學】音長。7. 一段，一節。
  1. The height of s. viciifolia hance is 1. 5m, crest amplitude is 2. 0 2. 0m2, the average number of branches is 4. 45, and plant coverage is from 75 % to 90 %. the length of new branch in a year is more than 50cm, and the new branch grows faster in june, july and august

    狼牙刺和檸條的新枝生長在6 、 7兩個月份最為旺盛，年生長量超過500m ，不同立地條件下，其地上部生物量差別較大，變幅在6 . 8 27 . 3t hm ~ 2間。
  2. The wider range of the directional distribution of wave energy, the shorter of the mean crest lengths and the wider range of the distribution of crest directional angles. the crest height and crest length show a high relativity while the crest heights are low and become independence at very high crest height

    獲得了波峰長度的統計分佈、波峰長度與波峰高度的聯合分佈、波峰高度與波峰長度相關性、波峰長度與波峰方向角的聯合分佈以及波峰在一個大面積海域中的出現概率等結果。
  3. Statistics of wave crests with different directional spreading parameters and different directional functions are obtained and discussed. jonswap spectrum and the directional function suggested by mitsuyasu, donelan and wen respectively are employed in the analyses. statistical distribution of wave crest characteristics such as crest length, crest height, and directional angles based on the above - mensioned numerical simulation of 3 - d random waves are analyzed

    以jonswap譜為頻譜，選取光易型方向函數（含三個參數） 、 donelan方向函數以及文氏方向函數等不同的方向函數進行模擬，對得到的波峰形式進行比較，分析了方向函數對波峰長度統計值的影響。
  4. A brief introduction of synthetic aperture radar ( sar ) and the application of sar image data in the research of crest length distribution is introduced. the method to compute the action of random waves with different crest lengths on vlfs. is also reviewed

    對星載合成孔徑雷達及其在波峰長度統計特性研究中的應用以及不同波峰長度海浪對超大型海上結構物的作用作了一個簡單的介紹，闡明了下一步的研究工作的思路。
  5. ( 2 ) validate whether the crest elevation can meet the require of energy dissipation and erosion prevention during the beginning period of flood discharge. ( 3 ) calculate the altitude of downriver cofferdam, and make it meet the require of energy dissipation and erosion prevention. ( 4 ) calculate some average velocity of flow through some sections, including contracted section in stilling basins behind upriver cofferdam, if the hydraulic jump happen in lower reaches of the river. the program will calculate the average velocity of flow of contracted section and the length of the apron

    主要設計內容包括：計算上游圍堰后消力池的尺寸；驗證泄洪初期壩面高程是否能夠滿足消能防沖需要；計算下游圍堰堰頂高程，使其滿足泄洪期圍堰和壩體過流的消能防沖和工程進度的需要；計算部分斷面平均流速，包括：上游圍堰后消力池中收縮斷面的斷面平均流速；壩首和壩末的斷面平均流速；當下遊河道發生水躍時，計算下遊河道的收縮斷面平均流速及需要鋪設護坦的長度。
  6. The basic features include a crest ( the highest point of the wave ), a trough ( the lowest point ), a height ( the vertical distance from the trough to the crest ), a wave length ( the horizontal distance between two wave crests ), and a period ( which is the time it takes a wave crest to travel one wave length )

    它們的基本特徵包括浪峰（波浪的最高點） 、波谷（最低點） 、浪高（從波谷到浪峰的垂直距離） 、波長（兩個浪峰間的水平距離）和周期（海峰走過一個波長所需的時間） 。
  7. The dimension of the very large floating structures ( vlfs ) is usually more than 1km. the design of such giant structures must consider the spatial coherence of waves. crest length is one of the main parameters in wave coherence

    超大型海上浮體結構（ vlfs ）的尺寸通常以千米計，對于如此尺度的結構，作為主要環境因素的海浪必須考慮其在空間上的不均勻性。
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