清末书院改革及其对近代高等教育的影响

书院是我国古代高等教育的重要形式,到了清末由于特殊的历史、社会因素,书院由衰败转而变革,通过不同的变革方式,发展出近代高等教育的因素,在教学、课程、机构、体制诸方面对中国近代高等教育的发展产生了很大的影响。     

在"快乐足球"教学中培养高职学生的职业素质

学生对体育运动有无兴趣,直接影响他们进行体育锻炼的自觉性和极积性,也决定着体育知识的掌握和技能的形成。“快乐足球”教学能促进学生把学习与足球有关的知识视为自身的需要,积极开展足球活动,刻苦进行锻炼,从而提高各类专业人才的基本素质。     

基于支持向量机的通信信号调制识别方法研究

支持向量机(Support VectorMachines简称SVMs)是基于统计学习理论的一种新的模式识别技术,它不仅结构简单,而且技术性能尤其是泛化能力明显提高.介绍支持向量机为理论基础的通信信号调制识别方法,计算机仿真结果证实此方法的可行性.     

初教专业历史课程设置及教学浅议

随教育事业的发展，素质教育的深入，三级师范已不能满足小学教育的需要，在一些教育发达地区已实现师范教育本科化。由于我省基础薄弱，最近几年才进行初教专业的探索，笔在承担初教专业历史教学任务，经过几年的探索性教学实践后，对我省五年制师范课程中关于历史课程的设置及教学方面应合理安排课程设计，采用较为合理的教学方法与手段，使学生知识理论与教学技能获得全面发展作一些探索。     

浅谈高职教育应对入世挑战方略

2001年，我国加入WTO，成为世界贸易组织的成员国。这一瞩世之举，将对我国进—步扩大开放，深化经济体制改革和政治体制改革，加快发展，增强竞争力，注入新的活力，同时，为我国高等教育、高等职业教育的发展提供难得的历史性机遇和强劲的推动力。近几年，我国高等职业教育迅速发展，可谓异军突起。从办学规模上看，高等职业教育在校生人数占全国高校在校生总数的一半以上，     

Numerical investigation of cavitating flow behind the cone of a poppet valve in water hydraulic system

Computational Fluid Dynamics (CFD) simulations of cavitating flow through water hydraulic poppet valves were performed using advanced RNGk-epsilon turbulence model. The flow was turbulent, incompressible and unsteady, for Reynolds numbers greater than 43000. The working fluid was water, and the structure of the valve was simplified as a two dimensional axisymmetric geometrical model. Flow field visualization was numerically achieved. The effects of inlet velocity, outlet pressure, opening size as well as poppet angle on cavitation intensity in the poppet valve were numerically investigated. Experimental flow visualization was conducted to capture cavitation images near the orifice in the poppet valve with 30° poppet angle using high speed video camera. The binary cavitating flow field distribution obtained from digital processing of the original cavitation image showed a good agreement with the numerical result. Project supported by the National Natural Science Foundation of China (No. 59835160) and Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry of China (No. 50175097)     

微波辐射合成3-氨基-1,2,4-三氮唑

在微波辐射条件下,以氨基胍重碳酸盐和甲酸为原料合成了3-氨基-1,2,4-三氮唑,反应速度比传统加热条件提高300倍,产率达到83.5%。优化后的最佳反应条件为微波输出功率为120 W,氨基胍重碳酸盐:甲酸摩尔比为1:1.25,溶剂无水乙醇为5mL,反应时间为60 s。     

英语作文写作技巧初探

大学生普遍认为英语写作比较难,究其原因,造成学生写作难的主要因素大致有以下几个方面:词汇贫乏、语言障碍和写作技能的生疏等.因此,大学生只要在平时的学习中多实践、多模仿,注意文章的构思、段落设计和文章连贯性等因素,就一定能写出一手好的英语文章.     

教材重印要认真把好质量关--兼评赵淡元先生主编的《中国历史要籍介绍及选读》

目前，有些较好的教材，由于种种原因，不断重印，而其中的差错和陈旧的观点并未及时地得到纠正，这是不利于教学的。赵淡元主编的《中国历史要籍介绍及选读》就存在这种情况。这类教材如果重印时对其中的差错不予订正，将会变成不合格的产品，故有关部门应认真把好重印教材的质量关。     

Filtration of micro-particles within multi-fiber arrays by adhesive DEM-CFD simulation

A 3D multi-time scale discrete element method-computational fluid dynamic (DEM-CFD) coupling approach was applied to investigate the filtration of micron-sized particles by different types of fiber arrays. Both the pressure drop and the filtration efficiency were examined to indicate the filtration performance of the fiber arrays. Fibers that were uniformly arrayed in a parallel or staggered manner were compared. Results showed that the staggered array showed a better performance than the parallel array in terms of both pressure drop and filtration efficiency. Further, we compared the performance of different staggered arrays, i.e. a regular case, one densified in the front layers and another densified in the back layers. The front densified array was found to enter the clogging and cake filtration stage in the shortest time, leading to the highest filtration efficiency, but the highest pressure drop. The back densified array still achieved a much higher filtration efficiency, despite a much lower pressure drop comparable to that of the regular array. The results suggest that the two kinds of densified arrays may be suited for different purposes, e.g. baghouse filters or breathing masks.