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We did our best to get the optimal methods to make the liquid more atomize, and established a model for gas-liquid mass and heat transfer process of cross-flow RPB.

根据气液两相流在多级离心加速雾化条件下流体的动量与质量方程,分析研究液体的雾化程度、液滴粒径、运动速度与方向、停留时间等,研究液相多级分散的级数、分散方式以及离心力场强度对气液相界面积、传质系数以及气相流阻的影响关系及其规律性,探讨沿旋转床径向使液体均匀雾化的最佳方法,建立旋转床中气液两相的运动与传质数学模型。

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。

Next, in the scheme for teleportation of an arbitrary multipartite GHZ-class state by one EPR pair, only one EPR pair and 3 classical bits are needed, which greatly lessens the oppressiveness of both quantum and classical channels. Then, in the scheme for deterministic, unilateral and controlled teleportation via cavity QED, Alice can determinately send her state to anyone of her agents, whereas the agents can not, with the channel being noiseless. What the agents can do is just to control the teleporting process, which enhance the security of the communication.Besides,based on the schemes discussed above,it is easy to see the character of an entangled state which can accomplish deterministic teleportation via cavity QED.

利用一个EPR对实现n-体类-GHZ态的量子隐形传态方案,整个通讯过程只需要一个EPR对和3 cbits的经典信息,大大节省了物理资源,缓解信道压力;利用非对称类-W态实现确定的单向受控量子隐形传态,在没有噪声的条件下,Alice可以将量子信息准确无误地发送给任一个客户,但每一个客户只能控制配合整个信息的传输过程,客户之间不能实现确定的信息传递,这样便保证了信息的安全性。

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。

DoNews 3 month 11 days of messages on March 11, read below student company division outgiving refutes the net Ni Ping is concerned " after stars goes, pass " be inferior those who break the law " mountain fastness product " censure, read the network says " after stars goes, pass " with " stars goes " relation, write with respect to add of image height fish hawk " red Lou Meng " hind 40 relations with before Cao Xueqin 80, be not pilfer edition.

DoNews 3月11日消息3月11日,书生公司旗下读吧网公开声明反驳倪萍有关《星辰变后传》是一部低劣违法的"山寨产品"指责,读吧网称《星辰变后传》与《星辰变》的关系,就像高鹗续写的《红楼梦》后四十回与曹雪芹前八十回的关系,并非盗版。

This is ALL about sharing you know. Or, to be more clear; No files shared or "0 total uploads allowed" probably = instant ban.'Nuff said...

要是只下不传就永久屏蔽你;最后:不守规矩的人太多了,我要从只下不传的人开刀了。

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。

In the article, we analysised the rainstorm process using conventional information, encryption data, strength ,speed and wind profile data of Doppler radar, discussed the atmospheric circulation system in the westing process of the subtropical high; revealed the different reasons caused two heavy precipitation (more than 10 mm per hour) and the possibility of small and medium-scale system existed, displayed the vertical distribution of the wind field over the stations in the rainstorm process and the close relationship between the transmission., strengthen of the level air-jet and the heavy precipitation, and then proved that the heavy precipitation was caused by the transmission and strengthen of the low-level jet.

利用常规资料,加密观测资料,多普勒雷达强度、速度和风廓线资料等对本过程进行周密细致的分析。探讨了在副热带高压西进过程中与之相配合的大气环流形势和影响系统;揭示了造成两次强降水(1小时大于10 mm以上)的不同原因和中小尺度系统存在的可能性;展示了暴雨过程中测站上空垂直风场的分布特点以及风廓线高低空急流下传和加强与强降水的密切关系,证明了强降水的产生主要由低空急流的下传和加强引起的。

To verify the accuracy of CFD simulations, experiments were carried out. The results of simulations with user defined function of the effects of impeller type and stirring rate on the velocity field were in good agreement with the output of particle image velocity. The oxygen mass transfer model can be used to predict the process of oxygen mass transfer in a vessel, and the logarithmical expression can successfully describe the relation between the oxygen concentration and the dissolution time.

结果表明,(1)采用Fluent软件并结合用户自定义方程(user defined function, UDF)能够很好地模拟出实际搅拌器内流场分布,模拟结果与采用粒子成像技术(particle image velocity, PIV)的实验测量结果相符;(2)采用氧气传质模型能预测氧气在搅拌器内的动态传质过程,同时氧气浓度与溶解时间的对数关系式能较好描述试验搅拌器内氧气动态传质过程;(3)在相同搅拌速度下,圆盘涡轮式搅拌器产生的湍流动能分布范围要大于桨式搅拌器产生的湍流动能,而且湍流动能分布更均匀,湍流强度更大。

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。

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推荐网络例句

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。