parabolic section 中文意思是什麼
parabolic section
解釋
拋物線剖面-
Another is curvature - parabolic method according to centrifugal acceleration of the vehicle in settlement section
另一種是依據汽車在沉降斷面上行駛時的離心加速度來進行控制的曲率拋物線法。 -
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 -
Rolling stock. leaf springs. leaves with variable cross - section for parabolic springs
鐵路車輛.片簧.拋物狀彈簧用可變截面的彈簧片 -
The rotated parabolic equation method was presented to compute the bistatic radar cross section ( rcs )
並提出了旋轉拋物線方程演算法，實現了目標任意角度雷達散射截面的快速計算。 -
At the beginning of fourth chapter, the article transforms the solving problem of partial differential equation for the american put price into a standard initial and boundary value problem of parabolic type by making some transformations. afterwards, the solving problem of parabolic type is transformed into a initial value problem of ordinary differential equation with respect to through fourier transform again. at the last section of the fourth chapter, the article solves the initial value problem with the progressive euler method and the finite element method
在第四章，對美式看跌期權價格所滿足的偏微分方程定解問題通過作一系列變換，使之轉化為一個標準的拋物型初、邊值問題，接著又通過傅里葉變換，把拋物型初、邊值問題轉換為一個關于時間變量的常微分方程初值問題，然後再分別利用改進的歐拉法和有限元法對其進行了求解。
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