查询词典 evaporation

A mathematical model ,with the heat of surface evaporation and respiration as interior heat resource,has been established to calculate the precooling time of spheral fruit by pressure-difference method.

通过将表面蒸发、呼吸热作为内热源加入到传热数学模型中，对单体球形果蔬压差预冷过程建立数学模型，并且简化边界条件，提出一种计算预冷所需时间的简便方法。

Water condition ; Potential evaporation spiration ; aridity index ; Global climate change ; sensitivity analysis.

水分状况；潜在蒸散；干燥指数；全球气候变化；敏感性分析

The sensitivity of China water condition to global climate change was assessed.The simulated results indicate that under the three prescribed climate scenarios, the potential evaporation spiration will increase greatly with the raising of temperature.

利用改进后的Penman式估算出全国潜在蒸散和干燥指数的空间分布，以及降水量增加10%，平均气温上升1.5℃、3.0℃和4.5℃ 3种假定未来气候情景下的潜在蒸散和干燥指数，以评价全球气候变化对中国水分状况的可能影响。

In most plants stomata are located mainly in the lower epidermis of the leaf, where evaporation rates are lower.

在多数植物中气孔主要分布于叶片的下表皮，因为该处的蒸腾作用较弱。

A portable photosynthesis system made by PPSYSTEM Ltd. was used to study the photosynthetic properties of 3 cultivarsof Rubus idaeus under the field conditions. The results indicated that the individual leave net photosynthetic rates had 2 peaks during a day,an obvious photosynthetic midday slump was observed in A,there was a significant difference in midday depression among the 3 cultivars;evaporation rates of B and C had 2 peaks during a day,while A had 1 peak,and an obvious midday slump was observed in B and C;Stomatic conductance is the key factor of midday slump;Compared with B and C,A had a higher water using efficiency,which will consume less soil water.

利用英国PP-SYSTEM公司生产的TPS-1便携式光合作用测定系统，对3个树莓品种的光合特性进行了比较研究，结果表明树莓叶片光合速率日变化呈双峰曲线，A品种&日中低落&现象明显，B、C品种不甚明显；B、C品种的蒸腾速率日变化曲线基本上为双峰型，日变化过程中的&午休&现象非常明显，而A品种为单峰型，日变化过程中的&午休&现象不甚明显；此外，叶片气孔导度与叶片光合速率的日变化趋势基本一致，呈平行变化趋势，说明气孔导度是影响光合速率的直接因子；较B、C品种而言，A品种具有较高的水分利用效率，说明其更能节约并有效地利用土壤水分。

In the first stage (230—300℃) the sulphatization of oxides on the one hand and the prevention of acid evaporation loss on the other should be both satisfied.

第一阶段(250—300℃)应滿足使氧化物硫酸化和阻止硫酸蒸汽蒸发逸散損失的双重要求。

With the experiment of thin film deposition by vacuum evaporation techniques,a preliminary as- sumption that the object-oriented techniques could be applied in the visual simulation of materials design system is put forward in this paper.

结合真空蒸发镀膜实验，提出了一种应用面向对象技术实现可视化材料设计模拟系统的初步设想。

The molecular composition measurement (GC/MS analysis) of the products formed in the different experimental stages showing that some sterane and terpane molecular parameters in crude oils are related to evaporation fractionation.

为了解油气成藏过程中常见的降压和气洗作用对甾、萜烷分子组成的影响，开展了PVT模拟实验。

The used ionic liquids can be regenerated by rotary evaporation or re-extraction using tetrachloromethane.

BPyBF4对模型化合物单程脱硫率达到45.5％，可以有效地脱除汽油中的含硫化合物，使用过的离子液体可以通过真空加热或用四氯化碳反萃取再生。

The hydrologic cycle, a major topi c in this science, is the complete cycle of phenomena through which water passes, beginning as atmospheric water vapor, passing into liquid and solid form as precipitation, thence along and into the ground surface, and finally again returning to the form of atmospheric water vapor by means of evaporation and transpiration.

水文循环，作为该学科中的一个主要课题，指的是水所经过的诸现象的整个循环过程，开始时是作为大气中的水蒸气，转而作为雨、雪、露、雹一类的降水量经过液体和固体形态，由此而沿着地层表面分布或进入地层表面，最终通过蒸发和散发作用再度回复到大气水蒸气的形态。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。