摘要：Microreaction technology is one of the most innovative and rapid developing fields in chemical engineering, synthesis and process technology. Many expectations toward enhanced product selectivity, yield and purity, improved safety, and access to new products and processes are directed to the microreaction technology. Microfluidic mixer is the most important component in microfluidic devices. Based on various principles, active and passive micromixers have been designed and investigated. This review is focused on the recent developments in microfluidic mixers. An overview of the flow phenomena and mixing characteristics in active and passive micromixers is presented, including the types of physical phenomena and their utilization in micromixers. Due to the simple fabrication technology and the easy implementation in a complex microfluidic system, T-micromixer is highlighted as an example to illustrate the effect of design and operating parameters on mixing efficiency and fuid flow inside microfluidic mixers.

摘要：Engineers often need to look for the right pieces of information by sifting through long engineering documents, It is a very tiring and time-consuming job. To address this issue, researchers are increasingly devoting their attention to new ways to help information users, including engineers, to access and retrieve document content. The research reported in this paper explores how to use the key technologies of document decomposition （study of document structure）, document mark-up （with EXtensible Mark- up Language （XML）, HyperText Mark-up Language （HTML）, and Scalable Vector Graphics （SVG））, and a facetted classification mechanism. Document content extraction is implemented via computer programming （with Java）. An Engineering Document Content Management System （EDCMS） developed in this research demonstrates that as information providers we can make document content in a more accessible manner for information users including engineers.The main features of the EDCMS system are： 1） EDCMS is a system that enables users, especially engineers, to access and retrieve information at content rather than document level. In other words, it provides the right pieces of information that answer specific questions so that engineers don＇t need to waste time sifting through the whole document to obtain the required piece of information. 2） Users can use the EDCMS via both the data and metadata of a document to access engineering document content. 3） Users can use the EDCMS to access and retrieve content objects, i.e. text, images and graphics （including engineering drawings） via multiple views and at different granularities based on decomposition schemes. Experiments with the EDCMS have been conducted on semi-structured documents, a textbook of CADCAM, and a set of project posters in the Engineering Design domain. Experimental results show that the system provides information users with a powerful solution to access document content.

摘要：目的:探索不同溶剂,即,乙醇(70%,85%,99%)乙醚及甲醛对复方巴布奇(白热斯油)搽剂及其所含组分,补骨脂,白花丹,芥子,黑种草子,驱虫班子等生药材出膏率的影响,为各单味药材找出最佳溶出环境,优化提取工艺。方法:分别与精密称取各单味药材10 g和处方比例的药粉,通过单因素试验设计方法,确定提取效率最高的溶剂,并分别计算其药材出膏百分率。结果:5种药材平均出膏率分别为,最高为85%乙醇,约占27.80%;其它依次为乙醚,占20.96%;95%乙醇,占20.73%;70%乙醇,占18.18%,最低为水,约占11.55%。各溶剂与出膏量之间有显著性差异(P<0.001)。结论:本处方及其所含组分在不同溶剂中被检药材出膏率不同,这能更有效地评价生药材内在质量并试验用选定提取方法奠定基础。