lognormal distribution 中文意思是什麼

lognormal distribution 解釋
對數常態分佈
  • lognormal : adj. 【數學】對數正態的。n. -mality ,-ly adv.
  • distribution : n 1 分配,分發,配給;分配裝置[系統];配給品;配給量;【經濟學】配給方法,配給過程;分紅;【法律...
  1. The lognormal distribution is widely used in geology to characterize sediment size variations and geochemical element concentrations.

    在地質學中,對數正態分佈已被廣泛用以表示沉積粒度變化特徵和地球化學元素濃集情況。
  2. The probability density distribution of + conforms to the lognormal behavior

    低速帶間距的概率密度分佈可用對數正態分佈來描述。
  3. Statistical analysis of accelerated life test on lognormal distribution case under type i censoring

    對數正態分佈定時截尾樣本下加速壽命試驗的統計分析
  4. The distribution patterns of total phosphate, available phosphate, available iron follow lognormal and others normal distribution. 3

    在分佈類型上,除全磷、速效磷、有效鐵服從對數正態分佈外,其餘全為正態分佈。
  5. It has found that section dimension deviations yield with normal distribution ; axis line deviations yield with lognormal distribution

    通過調查分析認為;混凝土截面尺寸偏差服從正態分佈,軸線位移偏差服從對數正態分佈。
  6. Abstract : in this paper, we obtain the point estimetions and the approximate confidence interval of the environment factor of the lognormal distribution based on the censoring samples. the accuracy of the approximate confidence interval is studied by the simalation method

    文摘:本文導出了壽命分佈為對數正態分佈時基於截尾樣本環境因子的點估計和近似置信限,對所給近似置信區間作了模擬研究。
  7. On the assumption that investment funds follow lognormal distribution, the reinsurance pricing question affected by investment gains is discussed from the reinsurers ' angle

    摘要從再保險人的立場出發,在投資基金服從對數正態分佈的假定下,討論了在投資收益影響下的再保險保費定價問題。
  8. Aimed at the feature of great fluctuation of water flow - rate in rivers and taking the monthly average flow - rate at low water with 90 % guaranty in recent ten years as design flow - rate, the permissible amount of major pollutants discharged into yellow river by lanzhou namely the stochastic environment capacity of waters, was determined by using a stochastic computation mode on the basis of lognormal distribution theory

    摘要針對河水流量變化大這一特點,採用以對數正態分佈理論為指導的隨機計算模式,以近十年90 %保證率最枯月平均流量為設計流量,確定黃河蘭州段主要污染物的容許排污量,即隨機水環境容量。
  9. In the case of lognormal distribution, we obtain the limit distribution of the sum of the logarithm of every sample ' s test time, and construct the pivot

    對于對數正態分佈場合,本文給出了樣品試驗時間對數和的漸近正態分佈,構造了樞軸量。
  10. As to normal distribution, we find the pivot, which we get from the limit distribution of total test time, is approximate with the one from the case of lognormal distribution

    對于正態分佈場合,本文給出了總試驗時間的漸近正態分佈,利用對數正態場合的結果得到參數的近似置信域。
  11. Through the i 、 q component of ipix radar sea clutter data " s histogram analyses and by skewness and kurtosis computed, it is been shown that sea clutter amplitude is not rayleigh distribution ; through the comparison of amplitude histogram and distributed models with the same parameters, it is been shown that hh polarization clutter is lognormal distribution, whereas vv polarization is k - distribution ; at the same time the correlation function and power spectrum density are been analyzed, at last the correlation compound k - distribution stochastic sequences whose covariance matrix is been given are been generated through sirp algorithm

    文中先介紹了海雜波幅度的有關模型,通過對ipix雷達海雜波數據的i 、 q分量的直方圖以及傾斜度和峰度進行了分析和計算,證明了海雜波幅度不服從瑞利分佈;使用幅度直方圖和相同參數下的各種分佈模型進行比較,得出hh極化符合對數正態分佈,而vv極化服從k -分佈的結論;同時對海雜波的相關函數和功率譜進行了分析,最後使用sirp演算法產生了給定協方差矩陣的相關復合k -分佈隨機序列。
  12. Underlying the assumption that the stock price accords with the model of the stock price fluctuating sources, by comprehensivily applying the stochasitic differential theory and no - arbitriagc thcory, this paper, under the conditions that the risk - free rate r is constant or ito stochasitic process, successively works out the option pricing about the stock price model with that the short - term profit function is piecewise lecture function arid that one with that the short - term profit function is possion jump process, derivats counterpart partial differential equation of option pricing. the outcome states : 1. when the short - term profit function is unusual flunctuating sources bring out a piecewise lecture function, this amendment on the lognormal distribution model does not improve the option price, because this partial differential equation of option pricing is the same one underlying the lognormal distribution model ( see equation 2. 14 )

    本文基於股價符合波動源模型的假設,綜合運用隨機微分理論等數學原理和無套利理論等金融理論,依此對短期收益率函數為分段階梯函數和possion跳躍過程的股價波動源模型分別在無風險利率是常數和隨機過程的條件下作了期權定價,推導出了相應的期權定價偏微分方程,結果表明: 1 、由異常波動源帶來的短期收益率函數是分段階梯函數時,這種對股價對數正態分佈模型的修正不能改善期權價格,因為基於這種模型的期權定價偏微分方程與基於股價對數正態分佈模型的期權定價偏微分方程完全相同(見方程2 . 14 ) 。
  13. The models of the stock price fluctuation is a mathematics model discribing the fluctuation of the stock price, it is all along the question financial scholars research over a long period of time, the models existing at present are mainly the model of randonm walk and the model of lognormal distribution etc. economists analyse the two models by authentic proof, which indicates that this two models do not fully qualify the actual stock market. in view of the above - mentioned facts, at the time some scholar have studied a new model of the stock price that even conforms to the actual stock market - that is the model of lognormal distribution

    股票價格波動模型是用於描述股票價格波動的數學模型,一直是金融學者們長期研究的問題。目前存在的模型主要有隨機遊走模型、對數正態模型等,鑒于股價波動的隨機遊走模型和對數正態模型均經過實證分析,表明不完全符合現實的股票市場,目前理論研究者提出一種更符合實際股票市場的股價模型-股價波動源模型(文[ 5 ]的作者將股價異常變化帶來的短期收益率函數附加在幾何brown運動上,推廣了對數正態模型)及研究出了另一種混合形式下(見文[ 15 ] )的期權定價方程。
  14. And use relative fitting error to measure statistical data non - uniform error ; then introduce the method systematically of using the fuzzy comprehensive evaluation method to carry on the overall superior test of the government statistical data quality. includes the establishment of step level appraisal target system, target weight determination, calculates the factor weight in various levels, uniform test of judgment matrix, and built up the final fuzzy comprehensive evaluation model of the government statistical data quality according to the above - mentioned standard ; finally selects the partial main social economy total quantity target from chinese statistics yearbook 2003 to carry on the real diagnosis analysis : ( 1 ) confirm these social economy total quantity targets using the description statistics and the k - s inspection method to obey the lognormal normal distribution. ( 2 ) according to the two levels of inspection methods which this article proposed to carry on accuracy and the overall superior test for these social economy total quantity targets

    本文首先從統計數據及質量的涵義出發,全面系統的介紹了統計數據質量的概念;其次,從研究統計數據的分佈規律入手,對統計數據準確性檢驗問題進行了探討,利用對數正態分佈檢驗對反映研究對象規模大小的統計數據的質量及異常數據進行定量檢查和識別,並利用相對擬合誤差計量統計數據的非一致性誤差;接著系統介紹了利用模糊綜合評價方法對政府統計數據質量進行整體優度檢驗的思路,具體包括建立遞階層次的評價指標體系,指標權重的確定,計算各層次中因素的權重,判斷矩陣的一致性檢驗,並根據上述標準建立了最終的政府統計數據質量模糊綜合評價模型;然後通過從2003年中國統計年鑒資料中選取部分主要的社會經濟總量指標進行實證分析: ( 1 )利用描述統計和k - s檢驗法來驗證這些社會經濟總量指標服從對數正態分佈的規律; ( 2 )按照本文提出的二級檢驗法來對這些社會經濟總量指標進行準確性和整體優度檢驗,從而達到綜合評價政府統計數據質量的目的;最後對這種二級檢驗法的優點和不足進行小結,提出今後應該努力改進的方向。
  15. The results of theory simulation are close to that of experiments. the size distribution of the particles is in agreement with the lognormal distribution

    理論模擬的結果表明,金屬微粉的流速增大,顆粒的平均粒徑減小,與實驗結果趨勢一致。
  16. On the assumption that the hydraulic conductivity field follows a lognormal distribution, the direct fourier transform is introduced to generate muhiple realizations of hydraulic conductivity field

    據以往研究,假設滲透系數場遵循對數正態分佈,利用直接傅立葉變換方法來生成滲透系數隨機場。
  17. 2. we have mixture exponential distribution and mixture lognormal distribution as examples, discuss the details of the model and the method. the estimation is proved to be practicable and effective through simulation

    分別以混合指數分佈和混合對數正態分佈為例,具體討論了文中提出的估計方法,並利用數值模擬驗證了文中所給方法的可行性和估計的有效性。
  18. Based on the analysis of experimental data from actual engineering, corrosion distribution law of general corrosion was found to follow the lognormal distribution through k - s test, while the localized corrosion follows the extreme distribution of type

    根據工程實際檢測數據的統計分析,通過k - s檢驗得出了均勻腐蝕深度服從對數正態分佈,局部腐蝕深度服從極值型分佈的規律。
  19. The probability distribution of the ratio of the maximum corrosion depth to the general corrosion depth was analyzed. through k - s test, it was found that this ratio follows the normal distribution or the lognormal distribution, which constructs a relationship between the mean corrosion condition and the worst corrosion condition

    分析了最大腐蝕深度與平均腐蝕深度比值的概率分佈特徵,通過k - s檢驗分析表明比值分佈為正態分佈或對數正態分佈,這個指標建立了鋼筋銹蝕整體平均狀況與最嚴重狀況的關系。
  20. According to the characteristics of uwb standard channel models, we propose the concept of “ composite lognormal random variables ( rvs ) ”. based on this new concept, a new and precise approach is proposed to approximate the statistical distribution of lognormal rvs ’ sum, which places no restriction on the distributional parameters and correlation between the two branches. then, we

    在此基礎上,提出了一種新的對對數正態隨機變量和的統計特性進行近似的方法,該方法對變量的分佈參數和變量間的相關特性沒有任何限制,且精度較已有方法有了進一步的提高。
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