frontal movement 中文意思是什麼
frontal movement
解釋
前緣推進-
The experimental device of soil moisture movement of multi water storage pit is developed, which can measure the infiltration of moisture and the movement of moisture frontal directly. distribution of soil water content in all soil section are measured with y ray apparatus. 3
利用該裝置進行室內的蓄水多坑灌水試驗，直接對水分的入滲過程和濕潤鋒變化進行觀測，並通過y射線儀裝置測量整個土體剖面上含水率的分佈狀況。 -
Based on the fundamental theory of dynamics of soil moisture and the condition of water storage pit irrigation, numerical modeling of soil moisture movement of single water storage pit in heterogeneous soil is established. adi ( alternating direction implicit method ) and gauess - seidel iterative method are used to solve it. by using the simulated value of modeling, the relation of water injection volume and maximum horizental distance of moisture frontal are concluded. according to the relation, interval of pits are derived. then, after analyzing the infiltration characteristic of soil moisture under the condition of interference infiltration in multi storage pit, numerical modeling of soil moisture movement of multi water storage pit in heterogeneous soil is established, and its numerical solution is also acquired
利用adi （交替方向隱式差分法）結合gauess ? seidel迭代法對模型進行數值求解。利用模型的計算結果得出了單坑注水量與濕潤鋒最大水平推進距離之間的關系，並據此確定了坑距。在此基礎上，通過對多坑干擾入滲條件下土壤水分入滲特性進行分析，太原理工大學碩士研究生學位論文建立了蓄水多坑非均質土壤水分運動數學模型，並對其進行數值求解。 -
Frontal impact protection is provided by driver ' s and passenger ' s airbags and with pretensioners on the seatbelts to prevent slack so preventing excessive forward movement in a crash
正面碰撞保護由駕駛員和乘客的安全氣囊和安全帶提供，安全帶有預緊器防止鬆弛，以避免碰撞時身體過度向前移動。
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