speed-length ratio 中文意思是什麼
speed-length ratio
解釋
速長比-
This paper presented a new type of triswach ( trimaran small waterplane area center hull ) with small length displacement volume ratio which has low powering requirements at high speed
摘要提出了一種阻力性能優良、船長排水量系數小的高速小水線面三體船型。 -
Z - tranformation augmented fasf algorithm proposed in the dissertation can reduce the search space of integer ambiguity effectively, improve the effiency and real - time processing ability of integer ambiguity resolution ; it is essential to analyse the reliability of integer ambiguity after it was fixed, the ratio test algorithm proposed in the dissertation can reduce the time to fix new integer ambiguity after wrong fixes are detected ; to reduce further the number of epochs required for ambiguity resolution, that the baseline length constraint information which acts as observables is used to do kalman filtering to speed up ambiguity resolution is proposed
本文提出的z變換增強fasf演算法能有效的減小模糊值搜索空間，提高整周模糊值解算的速度和實時性；整周模糊值確定后，需要對整周模糊值的可靠性進行分析，本文提出的比率檢測演算法能有效的減少整周模糊值錯誤確定后整周模糊值二次解算所需要的時間；為了進一步減少整周模糊值解算所需的歷元數目，本文提出把基線長度先驗信息作為觀測量進行卡爾曼濾波輔助整周模糊值求解。 -
The results show that the heat preservation coating and its proper thickness are favorable to the enhancement of filling mold speed of aluminium alloy ; the higher the pouring temperature is and the larger the ratio of hollow areas of vertical pouring is, the faster the speed of filling mold of aluminium alloy is ; if the mold is too thick or too thin, it may decrease the speed of filling mold ; the proper length and the area of vertical pouring are favorable to the enhancement of the speed of filling mold ; although negatire - pressure may improve filling the speed, too high negatire - pressure may enlarge the flaw in casting
結果表明：保溫塗料及一定的塗層厚度有利於提高鋁液的充型速度；澆注溫度越高、直澆道空心面積率越大，鋁液充型速度越快；模樣厚度太厚或太薄，均會使鋁液充型速度降低；一定的直澆道長度及直澆道面積有利於提高鋁液的充型速度；施加負壓會使鋁液的充型速度大大提高，但負壓過大會增大鑄造缺陷。 -
The sealing property problem for the stirring shaft of high - speed pressured reaction axe with large length to diameter ratio is always a difficult problem to study for design era and users
摘要高速大長徑比壓力反應釜攪拌軸密封性能問題一直是設計者與使用者研究的難題。 -
The experimental research verified that this method had probed a new way for solving the sealing problem of stirring shaft of high - speed pressured reaction axe with large length to diameter ratio
實驗研究證明，該方法為解決高速大長徑比壓力反應釜攪拌軸密封問題探索了一種新途徑。 -
On the basis of magnetic fluid sealing principle and micro - nano characteristics, this paper studied and designed a kind of new micro - nano magnetic fluid sealing structure that could satisfy more nicely the sealing requirements of stirring shaft of high speed pressured reaction axe with large length to diameter ratio, and by means of experiment the optimization de sign was carried out on its relevant parameters
該文根據磁性流體密封原理和微納米特性，研究設計了一種能更好地滿足高速大長徑比壓力反應釜攪拌軸密封要求的新型微納米磁性流體密封結構，並通過實驗對其相關參數進行了優化設計。 -
The threshold speed and the typical characteristics of the oil whip of the system are simulated under the nonlinear model of oil film force, and the state of motion and type of the bifurcation are analyzed by floquet multiplicators which is computed by the shooting method. secondly, the the nonlinear dynamical model of the low - pressure rotor - bearing system by column bearing with reduced dimensions is presented. the numerical results show the rule of the amplitude with the eccentricity of rotor, the length - to - diameter ratio, oil viscosity and the clearance - to - radius ratio of the bearing under the definite speed
其次，對降維后的低壓轉子?軸承系統的非線性動力學方程，計算了圓柱瓦軸承支撐的轉子系統的振動穩定性在固定轉速下隨偏心距、軸承長徑比、潤滑油動力粘度和軸承間隙比的變化規律，並分析了轉子前軸承軸頸的失穩轉速與轉子偏心距、軸承長徑比、潤滑油動力粘度和軸承間隙比之間的關系，同時利用floquet理論分析其運動狀態和分岔類型。
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