例句與造句

1. the logarithmic function is defined as the inverse of the exponential function .
   對數(shù)函數(shù)是作為指數(shù)函數(shù)的反函數(shù)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(jù)漫灘水流的運動特點，將漫灘水流的復(fù)式斷面分為主槽平衡區(qū)、灘槽交互區(qū)、灘地平衡區(qū)及邊壁區(qū)等4個區(qū)，并給出了各區(qū)寬度的經(jīng)驗公式.根據(jù)灘槽交互區(qū)垂線流速分布的變化特點，提出了附加尾流函數(shù)的對數(shù)流速分布公式.在簡化水流運動方程和泥沙擴散方程的基礎(chǔ)上，對灘槽交互區(qū)內(nèi)垂線平均流速及含沙量沿橫向分布進行了理論分析，提出了反映灘槽水流動量交換強度的橫向渦量粘性系數(shù)及橫向擴散系數(shù)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布的解析解，并與實測資料吻合較好
3. It's difficult to find logarithmic functions in a sentence. 用logarithmic functions造句挺難的