Numerical study on effects of door-opening on airflow patterns and dynamic cross-contamination in an ISO class 5 operating room

The contamination diffusion to the operating room when the door is open was simulated with a computational fluid dynamic (CFD) method,to give the extent of the contamination diffusion.The influence of the door-opening procedure was ignored since the door of the operating room is normally a sliding one.The flow field in the case of the 16 s course of opening the door was simulated.The simulated and the experimental results demonstrate that the extent of the contamination diffusion is around 1.5 m when there is no temperature difference between indoor and outdoor,and there is hardly any contamination diffusion when the temperature difference is 1 ℃.It can be concluded that the positive pressure difference in the operating room lost its function in preventing the contamination when the door is open.That the temperature of corridor is lower than that of operating room contributes to contamination control.Keeping 1 ℃ temperature difference between corridor and operating room and increasing positive pressure and air flow are suggested.It is more secure to set up an anteroom if persons come in or out of the operation room at the course of surgery.     

Automatic tracing and segmentation of rat mammary fat pads in MRI image sequences based on cartoon-texture model

The growth patterns of mammary fat pads and glandular tissues inside the fat pads may be related with the risk factors of breast cancer.Quantitative measurements of this relationship are available after segmentation of mammary pads and glandular tissues.Rat fat pads may lose continuity along image sequences or adjoin similar intensity areas like epidermis and subcutaneous regions.A new approach for automatic tracing and segmentation of fat pads in magnetic resonance imaging (MRI) image sequences is presented,which does not require that the number of pads be constant or the spatial location of pads be adjacent among image slices.First,each image is decomposed into cartoon image and texture image based on cartoon-texture model.They will be used as smooth image and feature image for segmentation and for targeting pad seeds,respectively.Then,two-phase direct energy segmentation based on Chan-Vese active contour model is applied to partitioning the cartoon image into a set of regions,from which the pad boundary is traced iteratively from the pad seed.A tracing algorithm based on scanning order is proposed to accurately trace the pad boundary,which effectively removes the epidermis attached to the pad without any post processing as well as solves the problem of over-segmentation of some small holes inside the pad.The experimental results demonstrate the utility of this approach in accurate delineation of various numbers of mammary pads from several sets of MRI images.     

推进农村义务教育发展的对策探讨

受国情制约、区位因素、历史原因和长期以来城乡二元体制等影响,当前推进我国农村义务教育新一轮发展仍面临诸多现实难题。可通过改善投入机制、完善监管机制、培育激励机制、健全保障机制等四项对策来化解这些现实难题,从而全面推进我国农村义务教育健康、均衡、长效、公平地发展。     

自适应服务组合中基于语义相似度及面向任务的服务发现算法(英文)

为了实现自适应和高效的Web服务组合, 提出了一种面向任务的服务发现算法. 将传统的服务组合过程划分为语义上的发现和功能上的匹配, 并将任务作为操作对象, 利用语义相似度从候选服务中寻找与给定任务相匹配的服务, 并生成对应的TWC图, 同时针对新服务设计更新算法. 将该方法应用到服务组合模型中, 搜索TWC图以得到一条最优的路径作为服务组合结果输出, 并能在服务失效时做出实时的更新以完成服务请求. 实验结果证明了算法的可行性和有效性, 也表明当最大搜索半径取2时, 服务数量和质量之间可达到平衡.     

工程数据库实现值域规范化的动态管理

针对工程数据库的数据特征,定义同义词典和值域词典,给出同义词典的构造算法和简化方法,初步实现了值域规范化的动态管理.     

我国独立学院规范化发展探析

对我国独立学院相关政策法规沿革进行梳理以及对独立学院发展中的未解难题进行剖析,提出未来我国独立学院进一步规范化发展的三个基本方向:真正独立发展,形成办学特色品牌和扩大办学声誉影响.     

反思与回应：程序保障型高校学生管理模式的探索

我国高等教育跨越式发展和社会法治化进程的推进,对高校传统的学生管理行为的合法性与合理性提出了新的挑战。为了求解新时期高校学生管理行为出现的诸多问题,通过以程序公正理念改造高校学生管理行为的合法性与合理性,并从观念、机制以及设立听证程序等方面构建程序保障型高校学生管理模式。     

关于加强江西企业文化建设的思考

本文着眼于探讨如何通过企业文化建设来增强江西企业核心竞争力和促进江西经济可持续发展,在分析江西企业文化建设现状、特点和存在问题的基础上,提出了发展江西企业文化的对策。     

建立符合中国国情评估体系,促进高等学校教育事业发展——论高校教学评估中图书馆藏书量指标可行性探讨

高校教学评估指标的科学性、合理性、可行性和激励性,是取得评估成效的关键。本文结合现状对优化图书馆馆藏建设,合理确定藏书指标及质量评价进行了分析探讨,并在文献资源购置中的质量和数量方面提出了一些建议。     

浅论英语广告用语的汉译

广告在当今这个已经进入信息时代的商品社会中广为人知,它影响着我们生活的方方面面,因此广告的翻译有着十分重要的意义。本文将通过对广告文体的词汇、句法及修辞等特点的分析,在此过程中提出广告用语的翻译方法和技巧。