格網偏角 的英文怎麼說
中文拼音 [géwǎngpiānjiǎo]
格網偏角
英文
declination of grid north-
Based on this milti - hierarchical model, application method for information organization of part is presented. chapter 3 proposes a new rule of arbitrary maximum angles of chord for triangulation and locale optimum, which avoides calculating angles of conventional methods in mesh simplification. moreover, with the introduction of arithmetical average windage concept, optimum method for the boundary mesh retriangulations is presented
第三章針對曲面網格簡化操作過程中出現的空洞剖分問題，討論層次模型的網格優化方法，提出了基於弦內角最大準則的局部網格簡化方法；針對網格曲面上存在的曲折邊界缺陷，提出以邊界輪廓算術平均偏差作為邊界曲折程度評定參數的邊界平滑優化剖分方法。The achievements achieved in the study are presented as follows : ( l ) to the distribution of construction duration of the pert network, even though every activity duration obeys normal distribution, it is failed to be proved to be in the obedience with normal distribution strictly. however, if there - are a lot of activities in a path of the pert network, for instance, more than 20 activities, without reference to the normal distributions - distribution or triangle distribution which activities duration obeys, the construction duration approximately obeys the normal distribution when the form of distribution is not partiality seriously
通過本文的研究取得的新成果有： （ 1 ）對pert網路施工工期的分佈，即使每一活動持續時間服從正態分佈，也不能證明其嚴格服從正態分佈，但當pert網路線路上的活動較多時，如超過20項，不論活動持續時間服從正態分佈、分佈，還是三角分佈，當偏態不十分明顯時，則工期近似服從正態分佈。
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