logarithmic function 中文意思是什麼

logarithmic function 解釋
對數函數
  • logarithmic : adj 對數的。 logarithmic function 對數函數。 a logarithmic scale 計算尺。 logarithmic series 對數...
  • function : n 1 功能，官能，機能，作用。2 〈常 pl 〉職務，職責。3 慶祝儀式；（盛大的）集會，宴會。4 【數學】...
  1. The logarithmic function is defined as the inverse of the exponential function.

    對數函數是作為指數函數的反函數來定義的。
  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. According to deduction and calculation the critical inclination of failure face has a linear relation with the slope angle, a quadratic function relation with the friction angle of failure face, a logarithmic relation with the height of failure part, a negative exponent relation with the cohesion of failure face, and a quadratic function relation with the unit weight of failure body

    通過推導和計算得知，滑面的臨界傾角與邊坡傾角呈線性關系，與破壞面摩擦角呈二次函數關系，與滑體高度呈對數關系，與破壞面的黏聚力呈負指數關系，與巖體重度呈二次函數關系。
  4. By comparing optimal target function, the paper shows a concise formula to the valuation of information. in the end, assuming the borrowing rate is bigger than saving rate, the paper provides explicit solutions to both logarithmic utility with partial information and power utility with full information by ito ' s formula other than the complicated dynamic programming. all of the strategies are suitable for operating online

    ）公式，得到了最優投資決策的簡單計算公式，通過比較完備信息與不完備信息情形下投資者的最優目標函數的差異，得到了（內部交易者獲得的）信息價值的簡潔公式，從而給出了信息價值的精確度量，並且該度量值易於投資者操作使用。
  5. 2. urease - based field effect transistor biosensor has been fabricated by the transfer of urease / amphiphile mixed langmuir films onto ion - sensitive field effect transistor ( isfet ). its function has been studied with isfet meter, and the intensity of output signals shows linear relationship with the logarithmic urea concentration from 0 to 20 mm

    用lb膜技術將脲酶兩親性分子混合langmuir膜轉移到離子敏感場效應晶體管（ isfet ）表面，製成了脲酶場效應晶體管生物傳感器；採用離子敏感場效應管特性測定儀對它的性能進行了分析。
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