搜索结果: 1-15 共查到“知识库 工学 evaporation”相关记录18条 . 查询时间(0.062 秒)
Geostatistical Analysis of Rainfall Temperature and Evaporation Data of Owerri for Ten Years
Evapotranspiration Rainfall Temperature Oscillations
2013/2/26
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)...
Light Panels Based on Expanded Perlite, Application as Adsorbers and Insulator against Rapid Evaporation in Subsaharien Countries
Perlite Adsorption Nauseous Odours Photo-Oxidation Dioxide Titanium
2013/3/11
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...
覆膜开孔蒸发条件下土体高度对水盐运移的影响（Effects of Soil Column Heights on Movement of Soil Water and Soil Salt-during Evaporation under Perforated Plastic Mulch）
覆膜开孔率 土体高度 单位深度累积蒸发量
2010/12/29
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...
基于蒸发量的膜下滴灌棉花灌溉预警装置设计与试验（Design and Experiment of Scheduling Irrigation Device Based on Pan Evaporation for Drip-irrigated Cotton under Plastic Mulch）
棉花 灌溉预警 蒸发 膜下滴灌
2010/12/29
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120mm来控制灌水时间，以0.15、0.4、0.7和0.25倍的累计蒸...
降雨灌溉蒸发条件下苹果园土壤水分运动数值模拟（Numerical Simulation for Root Zone Soil Moisture Movement of Apple Orchard under Rainfall-irrigation-evaporation）
苹果园 土壤水分运动 数值模拟
2009/11/24
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...
PERFORMANCE OF FALLING FILM PLATE EVAPORATORS IN RECONSTRUCTED MULTIPLE-EFFECT EVAPORATION STATION IN A SUGAR FACTORY SAJKASKA ZABALJ
sugar industry falling film plate evaporator heat transfer coefficient
2009/10/13
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...
NUMERICAL MODELING OF DISPERSE MATERIAL EVAPORATION IN AXISYMMETRIC THERMAL PLASMA REACTOR
two-phase flow thermal plasma heat and mass transfer
2009/10/13
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...
Microstructure and Some Functional Properties of Spray Dried Cheddar Whey Concentrated by Ultrafiltration or Combination of Ultrafiltration and Vacuum Evaporation
dairy dehydration role
2009/6/17
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...
Determination of the Amount of Irrigation Water and Interval for Cotton With the Pan-Evaporation Method
Irrigation Water Interval for Cotton Pan-Evaporation Method
2009/1/14
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...
Calibration and Use of the UGA EASY Evaporation Pan for Low Frequency Sprinkler Irrigation of Cotton in a Clay Soil
Cotton Calibration
2008/6/11
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...
Evaporation of Water Droplets by Radiation: Effect of Absorbing Inclusions
Cloud droplets Evaporation Radiation.
2016/3/30
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 ...
Formation of cobalt hydrides in low temperature field evaporation
cobalt hydrides field evaporation ab initio calculations
2011/4/27
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 ...
Structural and Optical Properties of In2S3 Thin Films Prepared by Flash Evaporation
In2S3 Thin Films Flash Evaporation
2010/12/7
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...
Effect of Ordinary Frequency High Electric Fields on Evaporation and Drying
high electric fields evaporation drying
2010/11/22
Evaporation of water was enhanced by ordinary frequency (60 Hz) high electric fields (HEF), and the effect was directly proportional to the extent of treatment, i.e., increased with time and electric ...