蒸發常數 的英文怎麼說
中文拼音 [zhēngfāchángshǔ]
蒸發常數
英文
evaporation constant-
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 results indicate that the qualitative behavior in this process is similar to that observed in condensation of vapor at or above atmosphere pressure, the coefficient of heat transfer for condensation in tube, the coefficient of heat transfer in total increase with the increasing of heat flux density and vapor pressure. however, heat flux density and vapor pressure have a more significant effect on them
發現水平管內低壓蒸汽冷凝過程與常壓條件下蒸汽冷凝過程相同，管內冷凝傳熱膜系數、總傳熱系數隨熱流密度、蒸汽壓力的增大而增大，但熱流密度、蒸汽壓力對低壓蒸汽冷凝有著更為顯著的影響，管外冷卻水流量對其影響並不明顯。In this dissertation we research the inversion pattern of three water through environment isotope information analysis, evaporation pattern analysis and inversion analysis of groundwater ; quantitatively analyse inversion amount through rule computational method and numeric value imitation, supplying scientific foundation for evaluation of water resources and rightful development and use
論文通過環境同位素信息分析、潛水蒸發試驗分析、近河岸地帶地下水動態分析研究三水轉化規律特徵；採用常規計算方法和數值模擬方法，定量分析地下水各轉化資源量。為研究區水資源評價及合理開發利用提供了科學依據。Alkali recovery is an effective way dealing with the black - liquor in pulp mill. black - liquor evaporation and combustion in, alkali recovery are complicated industrial processes. they have characteristics such as strong coupling, non - linearity, large time delay, parameter examining difficulty, etc. and people require more effective control system for the processes "
堿回收是紙廠處理黑液的有效方法，造紙堿回收過程中的燃燒和蒸發工段是復雜的工業過程，具有復雜性、非線性、大時滯和參數檢測困難等特點，而且人們對于控制系統的控制性能也提出越來越高的要求，常規控制技術已經沒有辦法滿足生產的需要。A linear relation can be found between response value of ultraviolet absorption detector, fluorescence detector, electrochemical detector and refractive index detector and quality of the object under test ; however, relation between response value of evaporative light - scattering detector and quality of the object under test is usually not a linear one, therefore, mathematical conversion of response value should be made before making calculation when necessary
紫外、熒光、電化學和示差折光檢測器的響應值與待測物的質量呈線性關系，但蒸發光散射檢測器響應值與待測物的質量通常並不呈線性關系，必要時需對響應值進行數學轉換后進行計算。R extracts remote sense information and conventional information to establish special analysis information system about water resource in longkou city which includes special database and attributive database ~ based on the analysis of database, ten water resource mathematical calculation models have been set up, i. e. precipitation, runoff, groundwater, evaporation, discharge, utilizable water resources degree, industry and living with horton geomorphology and g theory
提取遙感信息和常規信息，建立龍口市水資源時空分析基礎數據庫，包括空間數據庫和屬性數據庫。基於基礎數據庫的分析，以horton地貌律和g理論為指導，建立降水量、徑流、地下水、蒸發量、水資源可利用量、工農業及生活用水量等十種水資源數學計算模型，即構建起模型庫。In this paper, starting with the physical mechanics of land surface hydrologic process and the introduction of the theory in probability statistic distribution, an analytical expression of heterogeneous evapotranspiration efficiency is given which takes heterogeneous soil water content ' s subgrid scale spatial variability into account, through which the parameterization scheme of subgrid scale soil surface ' s evapotranspiration efficiency ( which is generally called mosaic method ) is modified to a statistic - dynamic scheme in which a whole heterogeneity of the grid region is considered
本文從陸面水文過程的物理機制出發，引進概率統計分佈理論，推導出一種由非均勻土壤含水量次網格尺度空間變率所形成的非均勻蒸發散率解析表達式，從而將通常的次網格尺度地表蒸散率的參數化方案（ mosaic方法） ，改進為考慮網格區整體非均勻性的統計-動力參數化方案。The paper first summarizes the phylogeny of the sensor fault diagnosis, and then introduces the academic achievements during recent years. emphasizes on the two methods of sensor fault diagnosis : the method based on observer and the method bases on nn. by using them realizes the sensor fault diagnosis of power plant main - stream temperature system
本文介紹了傳感器故障診斷技術的發展歷程及近年來在該領域中取得的一些最新研究成果；對基於診斷對象數學模型的故障診斷方法和基於神經網路的故障診斷方法展開了深入的研究，並以matlab為模擬工具、以某火電廠主蒸汽溫度系統溫度傳感器為研究對象，應用上述兩種方法分別設計了傳感器故障診斷系統，通過系統模擬證明該診斷系統能夠診斷出多種常見的傳感器故障。Acceding to the theory of crop water requirement, maximum potential evapotranspirations are calculated by applying fao penman - monteith method, and then we obtain the water requirement, water balance and water correction factors ect. of main crops ( spring maize, summer maize, spring wheat, winter wheat, cotton ) and different type grasslands, and the space - time distribution regularities of water requirement of cropland and natural grassland are analysed, the result show : the water requirements of same kind crop in different areas are different, water satified degrees are different to different crops in the same area, and water requirement of same crop are different between years for climatic variation ; the water requirements of main crops are increasing from east to west and from south to north, water satified degrees are decreasing from east to west and from south to north. in growing season, there are deficits in crops water supply in most area, so the irrigation is needed to meet the requirement for crop growing normally
根據作物需水的理論和方法，採用計算精度較高的faopenman - monteith方法（ 1998 ）計算了半乾旱區最大可能蒸散，並基於此計算五種主要旱地作物（春玉米、夏玉米、春小麥、冬小麥、棉花）和不同類型的天然草地的需水量、水分盈虧、水分訂正系數等，分析了農田和天然草地水分供需的時空分佈規律，結果表明：不同地區同一種作物的需水量是不同的，同一地區對不同作物的水分滿足程度是不同的，而且同一種作物在同一地區隨著氣候的變化需水量也會有一個年際變化；主要作物需水量由東向西，由南向北遞增，正常生長發育的水分保證程度由東向西，由南向北遞減。First, the hydrogeological conditions and characteristics are gathered up and the hydrogeological concept model is generalized. next, through collecting completely and analyzing systematically the rainfall, evaporation, surface runoff and observation datum of the groundwater water level, all hydrogeological parameters of this area is defined, then mathematical model of groundwater of dagu river is built
首先概括大沽河地下水庫的水文地質條件與特徵，概化出該區水文地質概念模型，然後通過全面收集和系統分析研究區的降雨、蒸發、地表徑流、灌溉和地下水水位常觀資料，確定該區的各項水文地質參數，進而建立了該區地下水的數值模型。分享友人