查询词典 evaporation rate

Ultra-thin freestanding polyimide films of 100 nm thickness were formed by sequential evaporation of 4,4'-diaminodiphenyl ether and pyromellitic dianhydride precursor monomers followed by a thermal treatment of 150 ℃ 1 h and 350 ℃ 2 h.

采用分层蒸镀法，在玻璃基片上依次蒸镀二氨基二苯醚和均苯四甲酸二酐两种单体，然后在空气环境中对样品进行不同温度和时间的热亚胺化处理，使二者在交界面上反应生成聚酰亚胺。

Based on investigating the processing enterprise actuality of potato starch in south-mountain area of Ningxia and analyzing the industrial water in potato starch in Xiji County, combined with the drought and rainless natural conditions in the local areas, the technology of multi-effect evaporation was bring forward.

通过对宁夏南部山区马铃薯淀粉加工企业现状的调查和对西吉马铃薯淀粉工业用水的分析，结合当地干旱少雨的自然条件，提出采用多效蒸发的技术。

At first,ecological mat can effectively reduce soil temperature of the soil layer from 0 cm to 15 cm,in detailed,the average daily soil temperature can decrease 2.06℃ to 4.56℃,which is benefit to reduce soil evaporation in high temperature;During the rainless period,the soil moisture content covered by ecological mat is much higher than mobile sand,especially,the soil moisture content of the layer form 0 cm to 15 cm always keep ...

首先生态垫能够显著降低沙地0~15 cm的土壤温度，日均温可降低2.06~4.56℃，有利于沙地高温条件下减少土壤蒸发；在连续无降雨的情况下，生态垫下各层次的土壤含水量都高于流动沙丘裸地，尤其是15~30 cm含水量相对稳定，人工植被建立后，其保存率、生长量较流动沙地均有较大幅度的提高。

Then,the evaporation source is mounted in an ultrahigh vacuum system and heated resistively in situ.

装入超高真空中，利用W丝自身的电阻加热，去气后，可获得数小时的清洁蒸发。

A mass of experiments validated that exploitation and rational utilization of saline shallow groundwater, declining the water level to an optimal depth to reducing water invalid evaporation can increase amount of water resources and storage capacity of aquifer, prevent waterlogging or drought, improve groundwater salinity and control the process of soil salination, improve the eco-environment, alleviate the threat for the resource of fresh water.

大量的实验证明，合理开发利用浅层咸水，使咸水水位降低到合理水平，可以：避免地下水的无效蒸发，增加水资源量；增强调蓄能力和抗早防涝能力；促进浅层咸水淡化，改造盐碱地，改善生态环境；减轻对淡水资源的威胁。

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。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48