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The thesis can be divided into five parts as follows: First, the structural characteristics of finned-pipe evaporator are analyzed. After selecting suitable microelement controller, the heat-transfer and mass-transfer processes are analyzed for every microelement under the conditions of dryness, wetness and frostiness. Based on previous equations, some parameters of frostiness are confirmed and the frost-growing model is set up under frost condition. Some hypotheses are postulated and with the help of the equation of mass-conservation, energy-conservation and momentum-conservation, the evaporation model which fits in the dynamic simulation is built, which set a solid foundation for system simulation. Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. Third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet-parameter on evaporator. Fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio-parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping.

本文的主要内容如下:1对翅片管蒸发器结构特点进行分析,选取适当的微元控制体,就干、湿和霜工况下对每个微元分别进行传热传质分析,基于经验关系式确定霜的有关参数,对于霜工况下的霜生长建立模型,经适当假设,运用质量守恒、能量守恒和动量守恒方程建立适合动态仿真的蒸发器数学模型,为系统仿真奠定基础; 2对蒸发在大扰动下的开、停机过程,运用动态集中参数模型进行分析和计算,为更好地描述制冷系统运行的全过程奠定基础,同时也为制冷系统实现自动控制提供一定的理论基础; 3对蒸发器正常运行过程,运用动态分布参数和参数间定量耦合的观点来分析和计算,为更好地了解稳态工况下各点参数的变化情况及各入口参数对蒸发器动态特性的影响即蒸发器性能对各参数变化的敏感性; 4编写翅片管蒸发器动态特性仿真计算程序,可以计算不同边界条件和初始条件下的制冷剂热力参数、空气温湿度和霜厚度分布场,实现对翅片管蒸发器在干、湿和霜工况下的动态仿真。

The conclusion shows that gas diffesion model under the third kind boundny conditionincludes the m0del under the first Kind boundary condition;mass transfer Biot criterion can repressent the featoreof gas diffesion field of coal particles.Moreover,the measurement method of gas diffu...

结论表明,第三类边界条件下的瓦斯扩散模型包含以往研究的第一类边界条件下的扩散模型,传质毕欧准数能表征煤粒瓦斯扩散场的特点;介绍了测试煤粒瓦斯扩散系数和表面传质系数的方法,给出了测试实例。

From "Dao"comes to heart,to human nature,at last it runs through the life situation of man being an integal part of nature,"Dao"is the intensive bases of the superorganic ethies houmenon of Yizhuan.

易传》是阴阳理论衍生出的《易传》的宇宙创生模式,"道"是其核心内容,从"道"向下落实到人心、人性,最后贯通于"天人合一"的人生境界,"道"是《易传》形上道德本体的内涵依据。

Anderson, The Coming Prince; L. Boettner, The Millennium; MJ Erickson, Contemporary Options in Eschatology; RN Gundry, The Church and the Tribulation; SN Gundry,"Hermeneutics or Zeitgeist as the Determining Factor in the History of Eschatology," JETS 20:45-55; AA Hoekema, The Bible and the Future; JE Hartley, TWOT, II, 778-79; R. Schippers, NIDNTT, II, 807-9; H. Schlier, TDNT, III, 140-48; T. Weber, Living in the Shadow of the Second Coming; D. Wilson, Armageddon Now!

传译安德森,即将王子;属boettner ,千年;兆焦耳埃里克森,现代选择在末世;氡冈德里,教会和磨难;锡根德里,"诠释学或时代精神作为决定性因素,在历史上的末世"喉20:45-55 ;机管局赫克玛,圣经和未来;哈特利是, 2吨,二, 778-79 ;传译schippers , nidntt ,二, 807-9 ;每小时施利尔, tdnt ,三, 140-48 ;汤匙,韦伯,生活在阴影下的第二次来;四威尔逊,世界末日!

So we won't be able to get you caps/video of new Unfabulous episode this week, but when I return I will get it up along with the other new episode airing that week.

所以这星期我们没法给你上传UNFABULOUS 的新情节了。但是我回来时会连同下一星期所创作出来的新的情节一起传上去的。

objective in order to investigate the variety of the airborne fungi in jingzhou area and study the relationships between airborne fungi and allergic diseases.methods we surveyed the fungi sensitizing of air in jingzhou city from feb.1th,2007 to jau.31th,2008 to quantitatively observe the daily airborne fungi and count under microscope through one year.results the fungi spores were present through all year.more than 20 taxa of airborne fungi have been collected,among which the most common fungi were uredinales,ustilaginales,alternaria,etc.fungi spores were ralated with the season and weather,the most aboudant period in sring and summer.conclusion the airborne fungi were seen one year and were mostly allergenic.many of then had seasonal distribution.

目的:调查荆州市气传真菌的种类、数量变化及飘散规律,了解优势菌群与过敏性疾病的关系,为荆州市空气真菌过敏症的防治提供参考。方法:2007年2月1日至2008年1月31日,在荆州市设曝片点,每日换片,收集全年气传真菌样品,在显微镜下统计,定量获得每天及全年的真菌数量。结果:全年均可见真菌孢子,共收集真菌种类20多种,其中最常见的有链格孢、锈菌、黑粉菌等,其数量和季节、气候有关,以春季、夏季最多,秋季和冬季依次降低。结论:气传真菌全年均有分布并具有较强的致敏性,部分真菌具有明显的季节性变化。

The experiment was carried out to study the effects of combined application of organic fertilizers on the control of soilborne diseases and the regulation of soil microbial diversity in a tomato field by using the method of Biolog.

在田间试验条件下,采用施用基肥和追肥的方法,结合Biolog技术,分析了不同有机肥配合施用对番茄土传病害的防治效果及对土壤微生物群落多样性的影响,并探讨了有机肥防治作物土传病害的机理及意义。

The experiment was carried out to study the effects of combined application of organic fertilizers on the control of soilborne diseases and the regulation of soil microbial diversity in a tomato field by using the method of Biolog. The mechanism of soilborne disease control and its significance were also discussed.

在田间试验条件下,采用施用基肥和追肥的方法,结合Biolog技术,分析了不同有机肥配合施用对番茄土传病害的防治效果及对土壤微生物群落多样性的影响,并探讨了有机肥防治作物土传病害的机理及意义。

This diffusivity equation has been used to model the different ideal condition drying process, analyze the influence of internal temperature field on internal moisture diffusion. Further studying shows that: on some condition, there may be exist the fastest drying process, to a certain extent, which illustrates the direction and the potential of optimizing heat and mass transfer.

最后应用模型进行了不同理想工况下物料干燥过程的模拟计算,分析了物料内部温度场对水分扩散的影响,进一步研究表明:物料在一定条件下有一个最快干燥过程存在,这在一定程度上说明了优化传热传质的方向与潜力。

On the foundation of Betti s theorem,the constitutive relation of multi-crack rockmass which considers the effect of crack-closure is developed in this paper.

本文从贝蒂定理出发,考虑裂隙在压剪应力作用下的闭合效应,推导出有序多裂隙岩体的本构方程,同时采用数学弹性力学的方法,精确推导出传压系数的理论公式,并对传剪系数加以分析。

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Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克,果实色泽鲜艳,汁多味浓,甜酸适口,离核仁甜,清末时就驰名陕、甘两省,清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异:红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感,ED90值分别为47.65、71.67和29.17g/hm2;春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感,ED90值分别为96.91、114.20g/hm2;而番茄不敏感。

However, I have an idea.

不过,我有个主意。