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Based on the water and fertilizer coupling experiment in corn field,one-dimensional soil moisture content model containing the water uptake corn roots is used in this paper to simulate the evapotranspiration and the water uptake of corn roots and the change of soil pondage and soil moisture budget under the different water and fertilizer coupling conditions in corn field.

结果表明:在玉米生长初期以棵间蒸发为主,其后则是以植株蒸腾为主;玉米在30~40 cm土层吸水速率达到最大值;玉米灌水量为田间持水量的70%与85%对土壤0~80 cm土层贮水量的贡献是相等的,并且高肥力在一定程度上可增强根系的吸水能力,高灌水可增强玉米根系对养分的吸收利用,但对于提高水肥利用率来说,理想的处理为中肥中水。

Monetary resources is gainable, which causes itself expansion, contraction and introduces the capital market gap which effect the monetary resources to increase the capital market bubble burst and make the market expansion and evaporation.

货币资源的可增值性为货币资源的膨胀、萎缩,提供了必要前提,资本市场的虚拟性又为资本市场泡沫和市值的蒸发提供了条件,资本市场上经常出现的缺口,通过进一步影响货币资源,催化资本市场泡沫的增大与破灭,市场的膨胀与蒸发。

By solving management model, the optimal groundwater withdrawal 〓 of the Wuwei Basin in two irrigation periods are obtained,〓 shows that the pumping condition of groundwater in the region can divided into six sub-regions: the pumping sub-region with maximum 〓 is located in the river courses; the sub-region with minimum 〓 in the spring overflow zone; and non-pumping sub-region in the 〓 irrigated districts and desert area, and that the unique way to crese groundwater pumpage is to pirate evapotranspiration in the oundwater evaporation zone.

通过管理模型的运转,获得了武威盆地平水年、枯水年、丰水年三个典型年份各灌期地下水的最优开采方案。按年最优开采模数,区域地下水的开采条件可分为六个区,地下水最强的开采区位于出山河流的主河道、石羊大河和洪水河沿岸,最弱的地区为泉水溢出带,河水谨区和沙漠区下开采地下水。同时表明,袭夺潜水蒸发量可增加地下水的开采量,该区现状条件下增加地下水的开采量的唯一途径是袭夺潜水蒸发带地下水蒸发量。

In the two test sites, the soil water movement numerical models of vertical-one-dimension and cross section two-dimension have been established with the softwarer Vadose/W and self-programming code, of which the advantage is that it can deals with lower boundary and the upper boundary (such as meteorologic, vegetational, etc) conditions in convenience. The fitting between the model and observation data from sites indicates that the models are relatively high precision. So the models can be used to study problems such as soil evaporation, infiltration to recharge groundwater and so on under various conditions.

运用包气带水分运移软件Vadose/W和自编程序,建立了两个试验场垂向一维和剖面二维土壤水运移模型,该模型的优势在于可灵活地处理下边界和上边界条件,试验场观测数据拟合表明模型精度较高,可用于研究各种条件下土壤蒸发、土壤水分下渗补给地下水等问题。

According to the theoretical analysis,the results show that the fresh air dehumidified before mixed with return air is more energy-saving among many kinds of realization shapes.Indoor exhaust used as regeneration air can also reduce the total energy consumption of the system.It may enhance the regeneration property when the recuperator is adopted to absorb energy to preheat the dilute liquid.

对此空调系统进行理论分析,得出如下结论:在溶液除湿蒸发冷却空调系统的多种实现形式中,新风经除湿后与回风混合比新回风混合后再除湿节能;将室内排风返回溶液再生器,进行热湿交换,既可加强对处理空气的预冷,回收排风冷量,又可提高再生器的效率,降低系统能耗;把回热器吸收除湿浓溶液中的部分热量用于溶液再生器的稀溶液预热,可以提高溶液的再生性能。

One reason why AIFU has the best spatial coupling effect is that it has a smaller evaporation area, thus its wate loss by this way is much smaller that traditional full irrigation; leching of fertilizer nutrients is much less than traditional irrigation because fertilizer and irrigating water exists in different furrows, the residual fertility exists in above 60 cm soil profile.

水肥异区交替灌水为一种局部灌水方式,其能够提高水分利用率的原因是可减少蒸发面积,从而减少灌溉水的蒸发损失;对养分的淋溶损失少,使肥料养分主要存在于60cm以上土层。

The evaporating-condenser temperature reached -45℃ and the small icebox temperature reached -30℃ under the loading or free-loading circumstances in the lyophilizing box.

在冻干箱负载或空载情况下蒸发冷凝器温度均可达到- 4 5℃,小冰箱可达到- 30℃,冻干的胶原海绵具有许多孔洞的结构,冻干的菌种和去纤酶性能保持良好。

Cm.℃.min-1,0.344 J.-1 and 0.311 J.-1.The average thermal diffusivity is 0.244~0.247cm2.min-1.By pressing soil and using lichen coat,the reforesting technique of catchment can lighten the bad effect of nudity soil,and can lower down average topsoil temperature by 0.2~1.5 ℃, maximum topsoil temperature by 2.7~4.0 ℃, topsoil temperature amplitude by 2.5~3.7 ℃, and depress 11%~25%soil thermal flux and 4%~15%soil evaporation.

拍光压实后喷涂引植地衣、苔藓,可有效缓解地表裸露后产生的负影响,在生长季可降低表层均温0.2~1.5 ℃,降低最高表层土温2.7~4.0℃,降低表层土温日较差2.5~3.7 ℃,降低土壤热通量11%~25%,有效降低土壤蒸发4%~15%。

The direct evaporative internal-melt ice storage air conditioning is a new and promising technology.It is important to master the ice coil heat transfer performance for the project.The paper analysed the dynamic characteristics and established the corresponding mathematical models of the system,and used the model to analyse the performance of caving cooling process changes.The model for direct evaporation in the U-shaped ice-melting ice storage VRV system couldbe helpful to design and optimization theory.

直接蒸发内融式冰盘管是空调蓄冷工程中常用的一种方式,对这种冰盘管的融冰传热性能的掌握对于工程应用非常重要,本文对基于VRV空调系统的内融式U形冰盘管融冰过程的动态特性进行了分析,建立了相应的数理模型,并利用该模型分析了放冷过程的性能变化,该模型可为直接蒸发内融式U形冰蓄冷VRV融冰系统的设计及优化提供理论依据。

Apart from the working limitations resulting from its structural property, the flat plate heat pipe carries out heat dissipation through the evaporation and condensation of the working fluid. Thus, if the working angle of the fluid is adverse to its backflow, the heat pipe will fail easily. Furthermore, not the orientations of all the heat sources are favorable to the functioning of the heat pipe. To compensate for this drawback, this research focuses primarily on the development of a composite structure which will reduce the effect of gravity on the working fluid. Generally speaking, the heat pipe is divided into three main categories: the groove type, sintered metal type and mesh screen type, as shown in Table 2. As far as capillary force is concerned, the sintered metal type and mesh screen type show better performance. As mentioned in R.

平板式热管除了因其结构特性而产生的工作极限之外,由于其作用乃是透过工作流体的蒸发及凝结进行散热,故若是其工作角度不利于液体之回流,便容易使热管失效,且并非所有之发热源都是位于有利于热管工作之位置,因此本研究之主要目的为设计一可减少重力对工作流体影响之复合式结构;一般而言,热管之结构大致可分为沟槽、烧结及网格三种(如表2所示),其中烧结及网格结构有较佳之毛细力,在 R。

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I'm strongly against the death penalty — it's an eye for an eye.

我不赞成死刑——这是以牙还牙的报复行为。

And to get you the support you need, we're enlisting all elements of our national power: our diplomacy and development, our economic might and our moral suasion, so that you and the rest of our military do not bear the burden of our security alone.

并给你们所须的支援,我们正徵召国家所有各种的力量:我们的外交及发展,我们的经济力量与道德劝说,所以你们与其他军人不须要孤独地负起国家安全的责任。

Imagine yourself to be an actor in a play on the stage.

设想你自己是一个演员在舞台上表演。