logarithmic law 中文意思是什麼

logarithmic law 解釋
對數定律
  • logarithmic : adj 對數的。 logarithmic function 對數函數。 a logarithmic scale 計算尺。 logarithmic series 對數...
  • law : n 勞〈姓氏〉。n 1 法律,法令;法典。2 法學;訴訟;司法界;律師(界),律師職務。3 (事物或科學的...
  1. The mean velocity profile of sediment - laden flow can bet divided into two regions. the profiles for both regions follow the logarithmic law. only the von karman universal constants are different from each other

    渾水時勻流速分佈可分成兩個流區,兩個流區的分佈均遵循對數規律,只是相應的卡門常數有所不同。
  2. In this paper, some characteristics of flow movement and sediment transport are analyzed by using the flume experiment data. the cross section of compound channel can be divided into four regions : the undisturbed region in main channel, the interactive region between channel and plain, the undisturbed region in flood plain and the boundary region. in the undisturbed regions, the distribution of longitudinal velocity along the depth has the feature of lograithmic. whereas, in the interactive region, the longitudinal velocity does not obey the logarithmic distribution law, but it can expressed as a revised logarithmic function by using a wake function. on the basis of the kinematic equation the velocity distribution of transverse velocity is obtained. in the boundary region, the longitudinal velocity obeys the law of parabolic distribution. furthermore, according to the simplified diffusion equation, the transverse distribution of sediment concentration in the interactive region is deduced. the analysis is in good agreement with the measured data

    本文根據漫灘水流的運動特點,將漫灘水流的復式斷面分為主槽平衡區、灘槽交互區、灘地平衡區及邊壁區等4個區,並給出了各區寬度的經驗公式.根據灘槽交互區垂線流速分佈的變化特點,提出了附加尾流函數的對數流速分佈公式.在簡化水流運動方程和泥沙擴散方程的基礎上,對灘槽交互區內垂線平均流速及含沙量沿橫向分佈進行了理論分析,提出了反映灘槽水流動量交換強度的橫向渦量粘性系數及橫向擴散系數的表達式,得到了漫灘水流垂線平均流速及含沙量沿橫向分佈的解析解,並與實測資料吻合較好
  3. Hereafter being the forecasting to the old age population coefficient, this text has been applied two kinds of regression model, namely univariate linear model and logarithmic model, and thought over three kinds of economic speed of development ( high, middle, low ) in the logarithmic model to forecast the old age population coefficient respectively. finally, by analyzing the forecasted value and the inertia law of population development, the paper points out the lengthening of the population equally expected life span will push forward the aging of population step by step to the advanced age development ; the development trend of the population aging continues to be clear, and just appears a stage characteristic ; furthermore, the population aging speed in rural area will be faster than in the city

    此後是對老年人口系數的預測,本文應用了兩種回歸模型,即一元線性回歸模型和對數擬合模型,並在對數擬合模型中考慮了經濟發展速度的高、中、低三種方案,對老年人口系數分別進行預測;最後在分析預測值和人口發展慣性規律基礎上對山東省未來人口老齡化發展趨勢作了較深入分析,指出人口平均預期壽命的不斷延長,將逐步推動人口老齡化向高齡化發展;人口老齡化繼續發展趨勢明顯,且呈現出階段性特徵;農村人口老齡化速度將快于城市。
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