正常散布 的英文怎麼說
中文拼音 [zhēngchángsǎnbù]
正常散布
英文
normal dispersion-
The usual method is, to find a sub - missile disper firstsion center first from each group data of the sub - missile ' s falling point coordinate, then to estimate the parameters according to a few data of dispersion center using the classical statistic method
通常的方法由每次試驗的子彈落點數據獲得一個子彈散布中心，再由少數的幾個散布中心數據、運用經典的統計方法求散布中心的正態總體分佈參數，其不足之處在於小樣本條件下采偽的概率很高。The surface panel method has been applied to predict the hydrodynamic performance of highly skewed propeller. the surface of propeller and its trailing vortex are discreted by a number of small hyperboloidal quadrilateral panels with constant source and doublet distribution. for highly skewed propeller, the conventional method generating grid oriented along constant radii will result in a high aspect ratio and a high skewness and a twist panel near the propeller tip on blade surface, which result easily in incorrect calculation results of velovity on blade surface, even in iteration divergence and calculation failure. a “ non - conventional grid ” is developed to acoid these problems. this grid can effectively solve the problem of the calculation and convergence for highly skewed propeller. the non - linear kutta condition of equal pressure on upper and lower at the trailing edge is executed by the iterative procedure. by sample calculating, the obtained results are satisfied the experimental data
採用面元法預報大側斜螺旋槳水動力性能，螺旋槳表面及尾渦面離散為四邊形雙曲面元，每個面元上布置等強度源匯和偶極子分佈.對于大側斜螺旋槳而言，槳葉表面採用常規的等半徑網格劃分方法在近葉梢處將導致大展弦比、大側斜和扭曲面元，這容易使槳葉表面速度的計算結果不正確，甚至會導致迭代過程發散及計算失敗.文中建立了一種「非常規網格」劃分方法，能有效地解決大側斜螺旋槳的計算和收斂問題.槳葉隨邊處通過迭代實現非線性等壓庫塔條件Thousands of dangerous killers, schooled in the methods of murder, often supported by outlaw regimes, are now spread throughout the world like ticking time bombs, set to go off without warning
數以千計的被訓練來殺人的危險殺手，通常都有非法政權在撐腰，現在正散布在全世界，在不動聲色地引爆一個又一個的定時炸彈。
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