extrema 中文意思是什麼
extrema
解釋
n. 名詞 extremum 的復數。-
Economists are usually interested in global extrema.
經濟學家經常碰到的是求整體極值。 -
We shall subsequently obtain some interesting results on global extrema.
我們將不斷地得出關于整體極值的某些有用的結果。 -
The mathematical statistics method and extrema variance clustering method can be used to visible automatic classifying and reading of logging curves. the lithofacies classifying program basing on multi - mineral model analysis presents a new method to analyze logging - facies and more accuracy and visualized logging facies section can be reached by using this method. in addition, it supplies reliable lithologic layering reference for search and evaluation of oil / gas caprock and it also made up for the high cost of core - drilling and the inaccuration between lithic fragment description and depth
採用基於「數理統計-極值方差聚類法」的面向對象可視化操作方法可有效地解決測井曲線的可視化自動分層取值問題；而基於多礦物模型分析的巖相劃分程序又提供了一種新的測井相分析方法，能得到更為準確直觀的測井相剖面，為尋找和評價油氣蓋層提供了可靠的巖性分層依據，同時彌補了鉆井取心費用高和錄井巖屑描述與深度有誤差的缺陷。 -
By whitening the covariance matrix of flat ambiguity, correlation between ambiguity components, the number of local extrema of cost function is reduced. the search program getting into precocity is avoided by suitable encoding and genetic operation
通過白化處理模糊度，減少模糊度搜索中指標函數的局部極值點，採用適當的編碼和遺傳操作使得在種群個體較少的情況下避免搜索陷入早熟。 -
The precious method to simulate earthquake accelerations is not perfect because the points on the interface still move according to the simulated acceleration when the points " motion ends, which is obviously a paradox. if the points " velocity is not zeroized, soil ' s damage value based on shear stress ' s peaks or extrema is overestimated in multi - point input analysis. the new method ' s rationality is analyzed
以往人工合成的地震波在地震結束時即地震加速度恆為零時速度不為零，這與合成地震動是「模擬輸入點從靜止到運動再到靜止的運動過程」這一要求不一致，同時導致時域內多點輸入分析時差動力過大以至算出的損傷值過大，於是本文提出了簡易的地震動速度歸零化方法並分析了其合理性。 -
If the inputted accelerations are velocity - zeroized and the damage value is calculated according to shear stress " extrema, as to 100 - meter - high earth dam, multi - point effect is not distinct ; but as to 240 - meter - high earth dam, in the part where permanent displacement and damage value is originally bigger the response is less tenser than that by one - point input, and in the part near basement the maximal shear stress and damage value is bigger, that is the multi - point effect in time domain
若同時進行了多點地震動速度歸零化和採用基於極值的損傷值計算方法，對於100米高的土石壩，多點輸入與單點輸入反應十分接近。對於240米高的超大型土石壩，壩體內永久位移和損傷值較大的部位多點輸入的反應量較小，這是多點輸入反應的特點或說多點效應。另外，多點效應也包括壩基部位的最大動剪應力和損傷值偏大這一效應。 -
A more reasonable method to calculate soil ' s damage value is advanced, which bases on extrema of irregular dynamic shear stress. previously it bases on peaks of shear stress to calculate damage value, but by this method the destructive action of multi - point inputted earthquake is overestimated, especially in the second half section of responding shear stress " time history the shear stress caused mainly by differential force undulate slightly on one side of its zero line
以往計算土體在不規則的動剪應力作用下的損傷值根據的是動剪應力的峰值，在時域內多點輸入分析中，由於差動力的的存在，使得時程後段動剪應力不穿零而在一側做幅度不大的波動，基於峰值的損傷值計算特別過高地估計了這段剪應力的破壞作用，過高的程度還隨延時增加而增加。 -
Find the critical number, point of inflection, relative extrema, increasing or decreasing interval, concave upward or downward interval of the function
找出此函數的端點，反曲點，相對極值，遞增或遞減區間，凹向上或凹向下的區間。 -
On the criterion for conditional extrema for functions of 2 - variables
二元函數條件極值的一個判定方法
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