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A method of using laser induced fluorescence(LIF)technique was applied to two-dimensional measurement of the liquid concentration distribution in the 250Y structured packing sheet. The experimental structured packing sheet was made of perspex so that the laser could pass through it. The visualization of the distribution of the liquid concentration in the structured packing sheet was realized. The calibration of the thickness and liquid concentration was carried out firstly and the regression formula I=kcd was acquired, in which concentration c and the liquid film thickness d were both considered. Then the liquid feed of uniform tracer(rhodamine)concentration entered the perspex structured packing from the top under different spraying densities. The corresponding thickness of liquid film on the packing was calculated. Finally, tracer(rhodamine)with a high concentration was injected only at one fixed point of the structured packing under different spraying densities of the liquid. With the known liquid film thickness, the concentration distribution of the tracer can be calculated inside the structured packing sheet. 相似文献
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屋大维在罗马内战中取胜,主要因为他能准确判断时局,以军队为主要力量,重视赢得民众的支持,并冷静分析斗争形势,以巧妙地策略分化、利用敌人并最终打败敌人. 相似文献
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为了探讨有效的双语教学方法,文章对大学三年级学生学习《PCR技术》双语课程的教学现状进行了调查,该调查结果对指导《PCR技术》双语教学有重要意义。 相似文献
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郁春江 《中国科教创新导刊》2012,(32):191-192
伴随着我国软件外包产业的快速成长,企业对人才数量的需求在不断增加,同时能力的要求也在不断的改变.分析软件外包企业对高职软件外包人才的能力要求,介绍通过学期项目探求培养符合外包企业所需要的软件外包人才. 相似文献
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资源系统工程的研究与应用 总被引:2,自引:1,他引:1
本文从资源定义出发,提出资源系统是指在一定区域内能够产生经济价值的、以提高人类当前和将来福利因素和条件的复杂系统。资源系统工程是对资源系统进行合理规划、设计和运行管理的一门交叉学科。研究分析认为:资源系统工程的理论基础是系统工程理论、系统工程技术和资源科学,研究的主要内容为资源系统规律、资源开发利用、资源协调控制,并初步确定了资源系统工程研究的方法论和学科体系。文章最后指出资源生态学、资源信息学的研究、资源系统定量分析,以及现代工程技术和方法的采用是资源系统工程研究的重点方向。资源系统工程是一门正在孕育发展中的学科,有待进一步去探索。 相似文献
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