limitation velocity 中文意思是什麼

limitation velocity 解釋
限界速度
  • limitation : n. 1. 限制。2. 界限；極限；限度；局限性；限制因素。3. 【法律】（訴訟）時效，有效期限。
  • velocity : n. 1. 迅速；快速。2. 速度，速率。3. 周轉率。
  1. Several numerical experiments are carried out to detect the actual steps and limitation for the velocity and depth parameter ' s ray inversion in the fourth chapter, and the we find that : a. the resolution capability of the layer ' s velocity change along both the top and bottom boundary is very poor. thus generally the vertical homogeneous layer model whose top velocity equal to that of its bottom boundary should be considered

    本文的第四章通過一系列模型試驗詳細探討了利用射線反演方法反演速度和深度參數的實際步驟，認為走時反演對速度層內頂部和底部速度變化的分辨能力很弱，僅僅依靠走時數據難以反演出層內頂部和底部的速度變化，故一般情況下應採用速度層底部和頂部速度相同的縱向均勻模型。
  2. In the shock tube, the detonation parameters, such as critical initiation energy, detonation velocity, detonation pressure, detonation limitation and etc., have been measured and the relation is too obtained between detonation parameters and equivalence ratio. chemical kinetics process of hydrocarbon fuel has been analyzed according to the chain reaction mechanism

    在立式激波管中測試了工業燃料c _ 5h _ （ 8 . 68 ）的臨界起爆能、爆速、爆壓、爆轟極限，得到了爆轟參數與當量比之間的關系；從爆轟反應是一個鏈反應機理出發，分析碳氫燃料的反應動力學過程。
  3. Secondly, the effectiveness and limitation of the classical perturbation, such as the method of multiple scales and the poincare - lindstedt method, are discussed in detail through a duffing oscillator with delayed velocity feedback. it is shown that the two perturbation methods are effective only in solving the approximate solution of the first two orders. an ambiguity or paradox will be encountered when they are used to seeking for the third or higher order approximation of solution

    其次，以一具有時滯速度反饋的duffing系統為例，研究了經典攝動法如多尺度法， poincar - lindstedt法等在求解時滯微分方程級數解時的適用性和局限性問題，指出利用這些方法只能有效求得系統的前兩階近似解，而在求系統的三次以上近似解時會出現矛盾或二義性。
  4. In general, the upward amplitude curve " curvature is larger, and it changes quicker. on the contrary, the downward is smaller and slower ; because the flare force contains the square of the wave elevation velocity, it results in an difference between the flare force frequence and the associated moving frequence ; the flare force decreases the downward amplitude of heaving oscillations ; the speed of ship has an ignorant effect on the peak values of three calculated values, but there is an obvious effect on the oscillating frequence ; the wave amplitude has an effect on the ship motion, and there is an linear relation between the oscillating amplitude and the wave amplitude on the whole. by the way, there are some experiences and lessons according to the progress calculation : before the calculation of the ship motion, we should checkout the balance in a calm water firstly, namely, the whole displace of ship and the longitudinal position of the center of gravity must be consistent with the draft in calm water, or else, the calculation may show the " floating " phenomenon ; the mixed language programming has a lot of virtues, but it exists a fatal limitation - the debug of dll

    研究表明：在某些頻率范圍內相關水動力系數基本不隨吃水變化，只有超過某一頻率后水動力系數的值才會出現差異；在橫搖方向，水動力系數並沒有隨著吃水的變化發生規則變化，而是出現了波動現象；近船首剖面的水動力系數計算表明，水動力系數的波動非常大，並遠遠偏離了平均位置的水動力系數值，值的變化速率也不盡相同，總的看來，上振幅曲線曲率較大，變化較快，下振幅曲線曲率較小，變化較慢；外飄力和波面運動的速度的平方項有關，導致其振動頻率和相應運動方向的頻率不同；外飄力使升沉向下運動的幅值減小；船速對三個計算量的峰值影響甚微，但對振動頻率有明顯影響；波幅對船舶運動的影響是明顯的，船舶運動的幅值基本上和波幅成線性關系。
  5. Transmition velocity relys on the style of encode and modulation essentially during modern data transmition for the quality of using line bandwidth and the immunity of code ties on them tightly. but it is important that the velocity of data transmition reaches its limitation in fact for the interface of environment and cross - talk. so for the improvement of transmition velocity, we must analyze the characteristics of noise signal and the model of line deeply and then take some useful measures to better the immunity of modulation wave

    在現代通信的數據傳輸過程中，傳輸速率本質上是由傳輸的編碼方式和調制方式決定的，因為編碼方式和調制方式直接決定了線路頻帶利用率和碼元抗干擾能力的好壞，因而直接決定了傳輸速率；但是在實際應用過程中，數據傳輸速率是不可能達到理想狀況的，因為環境干擾、串音干擾等因素的存在使得線路的頻帶不可能被完全利用起來；因此，必須認真分析線路的噪聲信號的特性以及噪聲線路的模型，以便在編碼方式和調制方式中針對性的做一些改進措施以改善調制波形的抗干擾能力，使得傳輸速率能夠進一步提高。
  6. Abstract : the limitation of three - link theorem in velocity analysis and the main problems in application of lou " s theorem are pointed out

    文摘:指出了用於速度分析的三心定理的局限性，應用羅洪田定式應注意的一些問題。
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