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搜索结果: 1-15 共查到工学 Evaporation相关记录19条 . 查询时间(0.078 秒)
In the first evaluation of evaporation as a renewable energy source, researchers at Columbia University find that U.S. lakes and reservoirs could generate 325 gigawatts of power, nearly 70 percent of ...
Rainfall, evaporation and temperature data of Owerri for ten years (Figure 1) (1998-2007) were acquired. The data were analyzed using standard statistical measures and climatological normal (Figure 2)...
Our project concentrates on manufacture of light panels based on available natural materials (expanded perlite, sawdust and refuse of wood, vegetable coal.) mixed with a natural resin not toxic (resin...
通过不同高度土体在不同覆膜开孔率条件下的室内蒸发试验,研究了土体高度变化时水盐分布的差异与相互联系。试验结果表明,不同高度土体的单位深度累积蒸发量与时间变化符合Gardner理论关系,单位深度累积蒸发量与时间和土体总高度存在二元线性函数关系;单位深度累积蒸发量和单位膜孔面积单位深度累积蒸发量均与土体高度和覆膜开孔率存在较好的函数关系;土体高度越小,单位深度含盐量和盐分浓度变化幅度越大,土体高度是影...
设计了一种基于蒸发量的简易灌溉预警装置,并建立了基于水量平衡原理的灌溉预警模型。通过田间试验,确定了适宜供水条件下新疆膜下滴灌棉花各生育阶段的蒸发皿—作物系数,并建立了适宜的灌溉预警指标,提出了降雨条件下的指标修正方法。田间应用表明,在北疆棉花膜下滴灌条件下,苗期、蕾期、花铃期和吐絮期分别以累计蒸发量达到140、75、50和120mm来控制灌水时间,以0.15、0.4、0.7和0.25倍的累计蒸...
根据土壤水动力学原理和果树根区土壤水分运动特点,建立了降雨灌溉蒸发条件下含根系吸水项的二维土壤水分运动数学模型,采用有限元法求解,对降雨灌溉蒸发条件下的地表边界条件进行处理。在田间进行了灌溉蒸发条件下果园土壤水分运动验证试验,采用田间实测土壤含水率分布资料对模型进行验证,结果表明模拟值与实测值吻合较好,所建的根区土壤水分运动模型是正确的,采用有限元法求解是可行的,该模型可用于预测果园田间土壤水分运...
General trend of free trade in regional level as well as in the direction of European Union has motivated sugar factories located in Serbia to invest in to technologies that are more efficient in orde...
A numerical 3D Euler-Lagrangian stochastic-deterministic (LS(D) model of two-phase flow laden with solid particles was developed. The model includes the relevant physical effects, namely phase interac...
In order to study the influence of the vacuum evaporation (VE) process on the functionality of whey protein concentrates (WPC’s) , Cheddar WPC’s were produced with and without VE, viz. by i) ultrafilt...
This study was conducted to determine the amount of irrigation water and interval of cotton irrigated by the drip system with the pan-evaporation method. The amount of irrigation water applied was ba...
A new irrigation scheduling tool called the UGA EASY Pan (Evaporation-based Accumulator for Sprinkler-enhanced Yield) allows remote observation of evaporation that can be correlated with crop water us...
Numerical solutions are obtained for transient response of water droplets to radiative heating. Results are presented for evaporation of polydispersed droplets in the solar radiation field. The evol...
The paper discusses the process of thermal evaporation of a foundry pattern. At several research-development centres, studies have been carried out to examine the physico-chemical phenomena that take ...
In the field evaporation process of cobalt in an atmosphere of hydrogen 10–6 Pa at a temperature of 20 K, both the ions of cobalt and the ones of CoHx (where x = 1, 2 and 3) have been observed. Since ...
In2S3thin films were deposited by flash evaporation of In2S3 powder. The effect of annealing in vacuum and under sulphur atmosphere on the structural and optical properties of these films was investig...

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