Thermal mixing of two miscible fluids in a T-shaped microchannel     

Xu B  Wong TN  Nguyen NT  Che Z  Chai JC 《Biomicrofluidics》2010,4(4):44102

In this paper, thermal mixing characteristics of two miscible fluids in a T-shaped microchannel are investigated theoretically, experimentally, and numerically. Thermal mixing processes in a T-shaped microchannel are divided into two zones, consisting of a T-junction and a mixing channel. An analytical two-dimensional model was first built to describe the heat transfer processes in the mixing channel. In the experiments, de-ionized water was employed as the working fluid. Laser induced fluorescence method was used to measure the fluid temperature field in the microchannel. Different combinations of flow rate ratios were studied to investigate the thermal mixing characteristics in the microchannel. At the T-junction, thermal diffusion is found to be dominant in this area due to the striation in the temperature contours. In the mixing channel, heat transfer processes are found to be controlled by thermal diffusion and convection. Measured temperature profiles at the T-junction and mixing channel are compared with analytical model and numerical simulation, respectively.  相似文献   

教育成本分担理论评析   总被引：3，自引：0，他引：3  

柴效武  余中国 《教学研究(河北)》2004,27(2):117-119

近年来,伴随着高等教育学生规模大幅扩容,教育资金捉襟见肘。吸引非政府资金投入教育产业是当前热门话题,学费制度改革更是其焦点之一。教育成本分担理论是这方面的基础理论,本文对该理论的提出背景和核心内容予以细述,同时指出它对当前学费制度改革的重要意义。  相似文献   

柔性板式膜生物反应器处理生活污水的试验研究     

柴天  傅海燕  严滨  李元高  张明真  赵坤 《中国科技信息》2010,(23)

采用新型柔性板式膜生物反应器(FMBR)对生活污水进行处理,并分别对COD、SS以及浊度等参数进行了考察。实验结果表明,当进水COD为400～600mg/L、膜通量在10～30L/m2.h时,最终出水COD50mg/L,浊度1NTU,SS几乎为0,对COD、SS以及浊度平均去除率分别达到92%、99%,100%,同时污泥浓度和反应器容积负荷都有显著提高,处理效果良好,出水水质稳定。  相似文献   

基于贝叶斯网络的空间受限项目风险管理研究     

柴国荣  黄龙沣  宗胜亮 《科技管理研究》2017,(14)

空间受限项目的事故风险源多,且易诱发连锁反应。如何快速识别空间受限项目的风险源,并有效评估各个诱发节点的风险大小,对空间受限项目的风险管理具有重要意义。识别空间受限项目风险源并构造贝叶斯网络,通过贝叶斯网络推理的正向预测、反向诊断,获得各个风险源节点的后验概率,并计算风险源概率与事故发生的互信息,同时引入风险可控值概念及指标量化,构建基于贝叶斯网络的二维四区风险管理模型,提出空间受限项目风险源管理策略,最后通过一个实例对研究结果进行说明。  相似文献   

浅析地方高校构建公共技术平台的作用   总被引：4，自引：0，他引：4  

柴金龙  李积彬 《高等工程教育研究》2005,(4):52-54

公共技术平台为企业的技术创新提供了有力的支持,是政府服务企业的重要措施。本文分析了公共技术平台的现状,认为在高校构建面向企业的公共技术平台具有多学科综合优势、人才资源优势、信息资源优势、设备资源优势,以及中立性、公正性和非盈利性优势,符合社会公共技术平台的社会公益性原则。  相似文献   

APL-based flexibility analysis of manufacturing grid     

刘丽兰  孙雪华  察红霞  柴建飞 《上海大学学报(英文版)》2009,13(5):352-355

With the characteristics of diversity, randomness, concurrency and decomposability, tasks in manufacturing field are very complicated, and so manufacturing grid(MG)should have considerable flexibility to deal with this problem. With the definition of node and arc, MG structure is converted into a small-world network. Given construction cost constraint, the problem of shortest task waiting time is transformed into the constrained optimization problem, and a corresponding flexibility analysis model based on average path length(APL)is proposed, and the premise of arc-length and node-distance are defined. The results of application example show that the analysis model is effective.  相似文献   

The impact of leadership and stakeholders on the success/failure of e-government service: Using the case study of e-stamping service in Hong Kong     

Sabrina Ching Yuen   《Government Information Quarterly》2009,26(4):594-604

Using e-stamping service in Hong Kong as a case study, this paper examines the impact of leadership and stakeholders on the success or failure of e-government service in Hong Kong. Multiple methods are used for data collection: documents and archival record research, direct observation, and interviews. Results show that both leadership and stakeholders have an impact on the success of e-stamping service.  相似文献   

RECONSTRUCTING DEWEYAN DEMOCRATIC EDUCATION FOR A GLOBALIZING WORLD     

Jessica Ching‐Sze Wang 《Educational theory》2009,59(4):409-425

As democratic citizenship education gains importance worldwide, one wonders whether common civic education practices in the United States, such as mock elections, are adequate models for other countries, or whether they fall short of realizing the goal of promoting democracy in different regions and cultures. Despite various controversies, one fundamental question remains: How should we teach democracy? Should we teach it as a system of government or as a way of life? Jessica Ching‐Sze Wang finds inspiration in Dewey's life and works. She draws on Dewey's experience during the First World War and his insights into the connection between democracy and education to reconstruct a culturally and morally robust form of democratic education, as opposed to the politically dominated one currently being practiced. Wang concludes that Deweyan democratic education thus reconstructed can help us better realize democracy as a way of life for our globalizing world.  相似文献   

艺术教育在大学素质教育中的体现     

柴伦党 《桂林师范高等专科学校学报》2010,24(4):69-71

大学艺术教育是当代大学教育必不可少的内容,其具体含义是用艺术的感染力来塑造当代大学生对真、善、美的认识和整体素质的提高,使当代大学生能够在艺术气息的熏陶下进行生活和学习,形成积极向上的状态,培养创新能力和社会适应能力。艺术教育还涉及到当代大学生的美育教育和德育教育,对树立当代大学生正确的世界观和价值观起到了不可估量的作用。  相似文献   

Alternative explanations for the Confucian Asian high performance and high self doubt paradox: Commentary on “Unforgiving Confucian culture: A breeding ground for high academic achievement,test anxiety and self-doubt?” by Lazar Stankov     

Magdalena Mo Ching Mok 《Learning and individual differences》2010,20(6):564-566

This commentary reflects upon Lazar Stankov's thesis which regards “unforgiving nature of Confucian Asian societies” as the driving force underpinning academic success of students from these societies. The commentary considers theoretical perspectives put forward by Jian Wang and Emily Lin (2008), and by Chiu and Klassen (2010) as two alternative frameworks for explaining the paradox of high academic performance and high self-doubt at large scale international assessments among Confucian Asian Societies. Whilst acknowledging contributions from the systematic logical deduction of Stankov's article, the commentary proposes the use of Generalised Graded Unfolding Model as an alternative analytical tool for the data.  相似文献