Normalization of logarithmic normal distribution through mapping transformation 用映射變換將對數(shù)正態(tài)分布正態(tài)化
When the data is not in normal or logarithmic normal distribution , the least - squared method is not applicable to obtaining the sensitive index 若試驗數(shù)據(jù)為非正態(tài)或非對數(shù)正態(tài)分布,最小二乘法求優(yōu)會受到限制。
The pearson distribution and the logarithmic normal distribution are used respectively to fit the asymptotic distributions of yearly maximum of the daily precipitation in chengdu during the period between 1951 and 1999 摘要利用1951 ~ 1999年成都日降水量年極大值的記錄,通過統(tǒng)計推斷,找出了成都日降水量年極大值遵循的漸近分布。
4 ) the number and mass concentration distributions of the background atmospheric sand particles of ymchuan , bayanhot and tonggunur display a unimodal form , obeying a logarithmic normal distribution , greatly differing f 黃沙的長距離輸送和小雨是泥雨形成的原因。云物理和降水與來自沙塵粒子混合,尤其是小于zpm的粒子,導致了華北地區(qū)泥雨的發(fā)生。
Abstract : this paper briefly introduces the method of testing the real sensitivity for eed and gives the data processing method in terms of the electrostatic critical ignition energy of conductive - powder eed conforming to logarithmic normal distribution 文摘:簡要介紹了電火工品真實靜電感度的測試方法,以導電藥式電火工品靜電臨界點火能量服從對數(shù)正態(tài)分布為基礎,給出了對應的數(shù)據(jù)處理方法。
By means of statistical inference as well as hypothesis test method , it is determined that the variables of compressive stress and shearing stress are of extreme - value distribution and that the variables of frictional coefficient and cohesion coefficient are of logarithmic normal distribution 應用統(tǒng)計推理和假設檢驗方法分析得知,壓應力與切應力隨機變量呈極值型分布,摩擦系數(shù)與粘結(jié)力系數(shù)隨機變量呈對數(shù)正態(tài)分布。
It has been found that the depth of crack and fracture toughness of material can be expressed by weibull distribution , ratio of depth to length of crack and strength of material can be expressed by logarithmic normal distribution and normal distribution respectively 對該管道主要隨機變量的統(tǒng)計分析表明,裂紋深度和材料的斷裂韌性表現(xiàn)為威布爾分布,裂紋深長比表現(xiàn)為對數(shù)正態(tài)分布,材料的屈服強度和拉伸強度表現(xiàn)為正態(tài)分布。
Based on the approach of turning some of the relevant extreme - value - type and logarithmic normal distribution variables into independent and normal random variables , the shear - slipping failure probability of a high arch dam is worked out to be of the order of magnitude of 10 ^ ( - 5 ) by means of second - order moment method 在將部分相關(guān)的極值型與對數(shù)正態(tài)分布隨機變量轉(zhuǎn)換為獨立、正態(tài)隨機變量的基礎上,利用二階矩法計算得到某高拱壩的剪滑失效概率為10 ^ ( - 5 )量級。