毛管力差 的英文怎麼說
中文拼音 [máoguǎnlìchā]
毛管力差
英文
capillary potential gradient-
At the same time, the quality of different - state water was studied. the results show : the soil bulk density of the fir wildwood heightens with the increase of soil depth, specifically 0. 74 > 0. 94 andl. 34g / cm3, the saturated, canaliculus and field moisture contents decrease gradually in layer a, b and c, accordingly the soil total foveola decreases gradually, and the moisture - hold capacity of the soil lessens gradually with the increase of the soil depth ; there is small difference of the soil bulk density between layer a and b in the outer space, which are respectively 0. 92 and 0. 99g / cm3, and the other laws are the same as the in ner in the main ; reverse success often occurs in the low position of the thoroughly - fell trace and plateau marsh is formed
結果表明：冷杉原始森林土壤容重隨土層深度的增加而增大，分別為0 . 74 、 0 . 94 、 1 . 34g cm ~ 3 ，飽和持水量、毛管持水量、田間持水量a層、 b層、 c層逐漸減小，十壤總孔隙度也逐漸減小，土壤的持水能力隨深度的增加逐漸減弱；林外空地a層、 b層十壤容重相差不人，分別為0 . 92和0 . 99g cm ~ 3 ，其它規律與林內人體相同：皆伐跡地的低洼地段容易發生逆行演替，形成高原沼澤地。( 5 ) it was more precise for using darcy - weisbach formula to calculate the hydraulic pressure slope curve in the lateral line, but too complexity. although i - pm wu formula is simple, the estimated results were not agreement with the measured data. a coefficient including irrigation uniformity was presented to modify i - pal wu formula, and the results were agreement after using the coefficient
（ 4 ）利用達西?韋斯巴赫公式計算微孔毛管的沿程水頭損失具有較高的精度，但計算復雜，吳義伯公式計算雖較簡單，但在灌水均勻度較差時誤差較大，為此對吳義伯公式進行了修正，提出了修正系數的計算經驗公式，取得了良好的結果，為簡易地下滴灌工程設計中水力計算建立了簡化公式。The tight plastic - lining technology is to adhere plastic powder inside steel pipe smoothly with method of metallurgical powder. comparing to common plastic - lining, tight plastic - lining with good intensity, has avoided the trouble of dropping and cracking. specially, the tight nylon - lining pipe can be used carrying particulate medium matter and solidpowder with excellent wearability
緊襯塑工藝採用粉末冶金法將塑料粉末均勻地附著在鋼管內表面，融熔流平、緊密地和鋼管本體結合在一起，與普通襯塑相比，塑料與鋼管的結合強度好，避免了普通襯塑管與鋼材基體結合力差容易脫落、開裂的毛病，特別是緊襯尼龍管道，具有優異的耐磨性，可輸送各類含固體顆粒介質、及粉體。With the in - built drip irrigation belt and thin wall chip irrigation belt taken as examples, the flow rate distribution and hydraulic losses of drippers along capillary tubes at different inlet pressures were measured under the conditions of horizontal slope and slope gradients of 0. 5 % and 1 %, then the uniformity of capillary tubes was calculated at different slope gradients and pressures in consideration of the manufacture deviation of drippers
摘要以內鑲式滴灌帶和薄壁滴灌帶為研究對象，測定了平坡、 0 . 5 %坡度和1 %坡度時，不同入口壓力下滴頭沿毛管的流量分佈和水力損失，並結合滴頭的製造偏差，計算得出不同坡度和壓力條件下滴灌毛管的均勻度。Many academicians researched their formation and accumulation mechanism and put forward manifold mechanisms, including the special mechanism of minority liquid molecular controlling the accumulation of lens reservoir by unknown gravitation, difference between liquid pressure compelling hydrocarbon to accumulate firstly in the lens reservoir, along cranny in the case of hydrocarbon replacing pore water in the lenticular body under capillary pressure, difference breakthrough employing hydrocarbon entering lens reservoir and so on
國內外學者提出了多種成藏機制，包括未知重力運動機製作用下，少數流體分子的個別特性控制透鏡狀砂巖油藏聚集；毛細管力作用下油氣替換透鏡體中的孔隙水；烴濃度差是油氣向砂體運移的主要動力；流體壓力差使油氣首先沿著裂隙向砂巖透鏡體中運移、聚集而成藏；差異突破作用使砂巖透鏡體成藏等。Goal function is to minimize the expense of trickle system ; the difference in pressure of drip line is thought as restriction condition ; we may obtain optimizing len gth of drip line by answering to the goal function
本文在灌水小區面積一定的情況下，以田間管網的造價與運行費用最小為目標函數，以毛管的壓力差為約束條件，求得田間灌水小區內毛管的經濟長度。分享友人