梯級下降的 的英文怎麼說
中文拼音 [tījíxiàjiàngde]
梯級下降的
英文
stepdown- 梯 : Ⅰ名詞1 (梯子; 樓梯) ladder; stairs; steps; staircase 2 (姓氏) a surname Ⅱ形容詞(形狀像樓梯的...
- 級 : Ⅰ名詞1 (等級) level; rank; grade 2 (年級) any of the yearly divisions of a school course; gra...
- 下 : 下動詞1. (用在動詞后,表示由高處到低處) 2. (用在動詞后, 表示有空間, 能容納) 3. (用在動詞后, 表示動作的完成或結果)
- 降 : 降動詞1. (投降) surrender; capitulate 2. (降伏) subdue; vanquish; tame
- 的 : 4次方是 The fourth power of 2 is direction
-
The application to qingjiang cascade hydropower plants shows that the proposed model can give the controlling rules for optimal dynamic flood storage and elevates the efficiency of reservoir system management and utilization of flood water
該模型應用於清江流域梯級水庫,計算結果表明,在不降低水庫及梯級原有的防洪標準前提下,能有效利用上游水布埡水庫的防洪庫容,分擔隔河巖水庫部分防洪任務,並顯著提高梯級水庫發電量。The first axis of dca ordination reflects a synthetic environmental gradient, positively correlated with precipitation, humidity, heating, primary productivity, and potential evaporation etc. the second axis of dca represents changes in altitude and longitude
Dca排序第一軸表現了一個綜合的環境梯度,即從左到右,降水、濕度、熱量、初級生產力、潛在蒸發量逐漸增強, dca第二軸反應了海拔和經度的變化,即從上到下,海拔降低、經度增加。In this paper a numerical method for equations of transport and biodegradation in the fractured media is discussed. because the equations consist of terms related to advection, diffusion, biochemical as well as the term of exchange betwen the fracture and the porous media, it is very difficult to find their solution. in order to find more efficient method for solving these equations, several numerical methods for the equations without biochemical terms are discussed first. the numerical results show that the cubic spline method can be used to solve advection flow dominated problem which often occurred in the fractured media. then, the equation with both advection - diffusion term and biochemical term are discussed. the splitting - operator is used to decouple the advection and diffusion terms with biochemical term in the equations. the way to determine the smaller time step for solving fast biochemical terms is introduced through comparing the order of characteristic time of biochemical term with that advection ( diffusion ) term. numerical simulation results show that good agreement between analytical solution and experiment result is attained
本文討論了含裂隙介質地下水污染物輸運與生物降解非線性方程組數值求解方法.方程含有對流項、擴散項、生長、死亡、吸附、解吸、趨化和孔隙與裂隙介質界面間的交換項的非線性偶合,使演算法十分困難.本文討論了無生化過程時的幾種求解方法,數值結果表明:用三次迎風插值法對常見的對流項占優勢,且場變量有較大梯度的問題較適用.在討論有生化反應過程時,利用對流項與生化反應項的特徵時間量級估算,給出了求生化過程作用子步的時間步長估算辦法.用上述方法所得到的模擬結果與解析解、無化學反應和有化學反應的實測值對比,吻合很好In this part, pga, pgv and pgd are studied, the main results are as follows : 1 ) in general, pga decrease with depth and can reach maximum at surface ; the pga ratio with depth of downhole / surface is affected by magnitude and ground pga value, the bigger the magnitude and pga value, the smaller the pga decrement with depth ; the decrement with depth is much more significant in near - surface than that in deep downhole
加速度峰值沿深度的變化與地震的大小和場地條件有關。對于土層場地,一般說來,隨著震級和地表pga的增大,加速度峰值沿深度的下降梯度減小。對于「土層基巖」型場地,基巖面處的水平分量約是地表的1 3 . 7 ,豎向分量約是地表的1 3 . 2 。分享友人