蒸發度 的英文怎麼說
中文拼音 [zhēngfādù]
蒸發度
英文
evaporativity-
The hydrology and aerography indexes change in the middle of the rainy season in dry - hot valley are explored in this paper, which involves the mean ground temperature, relative humidity, runoff on trunk, rainfall, evaporation quantity, etc
摘要對雨季中期乾熱河谷加勒比松林林中與林邊平均地溫、空氣相對濕度、樹幹流量、降雨量、蒸發量等水文氣象指標進行了研究。Water, containing dissolved calcium hydrogen carbonate, passes through the limestone and drops evaporate on the stalactite, increasing its length with a deposit of calcium carbonate.
含有溶解碳酸氫鈣的水通過石灰石滴在鐘乳石上蒸發,隨著碳酸鈣沉積物的增加不斷增加著它的長度。Based on the field investigations and laboratory examinations, a study of the population of the epiphytic dolichomitriopsis diversformis ( mitt. ) nog. in fanjing mountain reveals that its habitats are different among different host trees, but that there lies the common habitat characteristics of not more than 2m height from the bottoms of host trees trunks, less light, high relative humidity, slow wind speed, slow evaporation speed and long time of remaining humid in middle - lower tree bark ; that it is one dioecious moss species, the morphology is remarkably different between its perichaetium and perigonium, the number of its perichaetia is much more than that of its perigonia, its perigonium is difficult to find out, its sporophyte is upright, its seta is long and thin, its capsule is regular long oval and its calyptra is cucullate
摘要通過野外調查和室內觀測對貴州省梵凈山樹附生尖葉擬船葉蘚種群的研究表明,其生境因其所附生的樹種不同而有所不同,但具有共同特點:附生在樹干下部距地面2m高的范圍之內,光照弱、濕度大、風速小、蒸發量小、中下部樹皮保持濕潤的持續時間長;其為雌雄異株蘚種,雌、雄器苞形態差異明顯,雌器苞數量多,雄器苞數量少並且難于發現,孢子體直立,蒴柄細長,孢蒴規則長卵形,蒴帽兜形。It was found : 1 ) the film restrained evaporation surface intensity and had obvious function of rising and keeping moisture, 2 ) the drip irrigation could supply water according to growing requirement and augment of water conflux intensity around crop root, it also had strongly controllable operation and wasted fewer water
覆膜抑制了土壤表面的蒸發面匯,具有明顯的提墑保墑作用,滴灌能隨時根據作物生長需要及作物根系匯流強度的增大而補充匯流源,可控性很強,水的浪費率很低。Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet - parameter on evaporator. fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio - parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping
本文的主要內容如下: 1 )對翅片管蒸發器結構特點進行分析,選取適當的微元控制體,就干、濕和霜工況下對每個微元分別進行傳熱傳質分析,基於經驗關系式確定霜的有關參數,對于霜工況下的霜生長建立模型,經適當假設,運用質量守恆、能量守恆和動量守恆方程建立適合動態模擬的蒸發器數學模型,為系統模擬奠定基礎; 2 )對蒸發在大擾動下的開、停機過程,運用動態集中參數模型進行分析和計算,為更好地描述製冷系統運行的全過程奠定基礎,同時也為製冷系統實現自動控制提供一定的理論基礎; 3 )對蒸發器正常運行過程,運用動態分佈參數和參數間定量耦合的觀點來分析和計算,為更好地了解穩態工況下各點參數的變化情況及各入口參數對蒸發器動態特性的影響即蒸發器性能對各參數變化的敏感性; 4 )編寫翅片管蒸發器動態特性模擬計算程序,可以計算不同邊界條件和初始條件下的製冷劑熱力參數、空氣溫濕度和霜厚度分佈場,實現對翅片管蒸發器在干、濕和霜工況下的動態模擬。The thesis focuses on the development of the dynamic simulation model of evaporators, the accomplishment of the stable and dynamic simulation of the parameters of cryogen - side, air - side and how to carry out dynamic simulation on the refrigerating effect of evaporators under different evaporating temperature and the realization of the analyses and calculations of the main parameters, such as, the wind speed of air - side and specific humidity etc, which affect the function of evaporators
本文重點是對蒸發器建立動態模擬模型,並對製冷劑側和空氣側參數進行穩態和動態模擬,同時對蒸發器在不同蒸發溫度下的製冷量進行了動態模擬,而且對影響蒸發器性能的主要參數(空氣側入口風速、入口含濕量等)進行了分析和計算。Cylinder dryer is a dind of rotatin continuous drying equipment with internal heating conducting - style, certain thickness of materials film theres to the lower trough of materials under the rotating cylinder. heat is transferred to the internal wall of the cylinder through pipes and misfired ahain to the external wall and to materials film, to evaporate and damnify moisture in materials film so as to dry materials
滾筒乾燥機是一種內加熱傳導型轉動連續乾燥設備。旋轉的滾筒通過其下部料槽,粘附著一厚度的料膜。熱量通過管道輔送至滾筒內壁,傳導到滾筒外壁,再傳導給料膜,使料膜中的濕度得到蒸發、脫濕、使含濕份的物料得到乾燥。The mechanism of the downburst formation was also investigated based on the cloud microphysics of the simulated storm and it was found that this downburst was primarily produced by hail loading, and enhanced by hail melting and rain evaporation. and the loading and the melting of hail played a very important role in producing the downburst. the gale at the surface was caused by the severe downburst
從雲微物理學角度分析了此次局地性大風的形成原因,認為由高空冰雹粒子的拖曳產生的負浮力作用是促發強下沉氣流產生的主要原因,其次是冰雹的融化和雨水蒸發冷卻對下沉氣流起加速作用,冰雹的拖曳和融化作用對下沉氣流具有決定性的作用。As a result it enhanced the water - retaining and fertility - retaining capacity, strengthened the anti - scour and anti - erosion ability. 3. sabaigrass can meliorated the little entironment of purple soil bare slope field the results show that sabaigrass treatment and grass tree solid plating treatment can reduce n ( nitrogen ), p ( phosphorus ) and k ( potassium ) erosion, increase soil nutrition element content, it also increase soil water content and soil pondage, decrease soil water evaporation, strengthen the anti - drought ability
龍須草能改善紫色土荒坡地的小生境龍須草純種植被和林草立體種植植被能不同程度地增加土壤的有機質和速效n 、 p 、 k的含量;增加土壤含水量和貯水量,減緩和減少土壤的水分蒸發,增強土壤的抗旱能力;降低土壤盛夏的地表最高溫度,減少地表溫度變化幅度。Taking the lest total internal losing exergy for target function, the distribute of difference in temperature among the three - effect is also acquired. an experimental device for three - effect falling - film evaporation was designed and constructed. the experiments of potassium carbonate solution was finished under different temperature of vapor and different input material liquid volume
建立了三效降膜蒸發的實驗裝置,以碳酸鉀溶液為原料進行了不同加熱蒸汽溫度、不同進料量的實驗研究,得到了實驗設備的(火用)損分佈,並研究了各部分損失的(火用)及有效利用的(火用)值與加熱生蒸汽溫度與進料量的關系。Calculation of activity from vapor pressure of saturated solution of mgcl2 in alcohol
蒸發熱及乙醇活度的測定If the environmental relative humidity is lower, the drop will undergo evaporation and solute concentration will rise.
如果環境相對濕度較低,則液滴將蒸發,溶質的濃度也隨之提高。Nevertheless, the water evaporation from the water bath, condensation on fabric surface and vapor transmission through the fabric is greater and the moisture vapor resistance smaller under the subzero ( - 20 ) climate than those under the conventional ( 20 ) climate
在低溫環境下( - 20 ) ,水浴的水氣蒸發率(模擬人體出汗) 、織物水凝結率和透過織物的水氣蒸發率大,織物濕阻小,表明了織物表面濕阻與環境濕度是相關的。Suction gas pressure goes up as the compressor run at the lower speed in the lower burthen, and this is beneficial to lower systems energy - consume. when the system is controlled by wvf, the discharge change of the evaporator is not linear ; the electronic expansion valve is adopted to regulate the system superheat degree, and the controlled object is parameter time varying, accordingly, the time varying controller should be adopted
在負荷較小時,壓縮機採用低速運轉,吸氣壓力升高,這對系統降低能耗是有利的;變頻控制時,蒸發器製冷劑流量的變化並非線性;系統中採用電子膨脹閥進行過熱度控制,被控對象具有參數時變的特性,相應地宜採用變結構的控制器。Vertical combination of these three sequences can be well correlated in evaporitive platform area even though thicknesses of each sequence are obviously different
這三種層序的縱向組合在蒸發臺地相區可以很好對比,盡管各層序厚度有明顯變化。Evaporation : two u. s. weather bureau class a pans are operated at king s park. the mean water temperature is taken to be the mean of the daily maximum and minimum surface water temperature
蒸發:天文臺使用兩個美國氣象局甲級蒸發皿于京士柏氣象站量度蒸發量,以皿內每日量得的最高及最低水面溫度之平均數作為當日的平均水溫。Hor izontal film evaporators have the following advantages : large capacity per unit area ; short drying time ; adjustability of thickness of film ; adequate process co ntrol
臥式薄膜蒸發器具有處理量大、時間短、可調節膜的厚度和容易控制的優點。There is a vaporizing layer below 0 layer and it is far thick, which may be one of the important reasons of small precipitation on ground ; in the paper the cloud and the rain drop size distribution in warm layer of stratiform cloud are calculated and analyzed. it is found that n ( d ) = n0dnexp ( - a d ) can express the size distributions of little cloud drops, big cloud drops and rain drops. the observational and calculated results are well matched
在零度層以下蒸發層的存在,且比較深厚,應是導致地面雨強較小的重要因素之一;本文對暖層的雲滴譜和雨滴譜進行了計算,對小雲滴、大雲滴和雨滴分佈可以用同一種形式的分佈密度函數多階函數n ( d ) = n _ 0d ~ nexp ( - d )來表示。In the condition of same condensation temperature and evaporating temperature, the cop of the basic gax cycle is lower than that of the simplicity cascade cycle, but it is greatly better than the mid - pressure double - effect cascade cycle, on the other hand, the work condition is not as rigor as the simplicity cascade cycle, so the ratio of performance and cost is relatively high
在相同的冷凝溫度和蒸發溫度下,基本gax循環的性能系數( cop )雖然比單純復疊循環的低,但要遠遠優于中壓雙效復疊循環,而且運行的條件不象單純復疊循環那樣苛刻,故基本gax循環的性價比較高。Eev should be selected for various refrigeration systems according to the thermal properties of refrigerants ; the discharge coefficient of eev is sensitive to the aperture and impulse quantity of eev ; when the eev structure is made, the discharge coefficient goes up with the lowering of evaporation temperature or goes down with the hoisting of the condensation temperature. it is le
對于不同工質的冷藏集裝箱製冷系統,電子膨脹閥應該根據具體製冷劑的熱力性質選取;電子膨脹閥流量系數對孔徑和脈沖數比較敏感;在結構固定時,流量系數隨蒸發溫度的降低而升高,隨冷凝溫度的增加而增大,受過冷度變化的影響較小;電子膨脹閥的容量受孔徑影響最大。分享友人