CALL教学中应当怎样注意网络交流中的礼仪问题     

阮全友  陈奇敏 《通化师范学院学报》2002,(6)

外语教学中非常注重学生跨文化交流能力的培养,计算机用于教学中以后,广大教师和学生经常地使用到电子邮件、键友、电子论坛、电子聊天、网络视频会议等等资源。因此,网络跨文化交流能力变得尤为重要。作为一名外语教师,特别是担负基础外语教学任务的外语教师,了解一定的网络交流礼仪是十分必要的。  相似文献   

Optimization of conditions for supercritical fluid extraction of flavonoids from hops (Humulus lupulus L.)     

He GQ  Xiong HP  Chen QH  Ruan H  Wang ZY  Traoré L 《Journal of Zhejiang University. Science. B》2005,6(10):999-1004

Waste hops are good sources of flavonoids. Extraction of flavonoids from waste hops (SC-CO₂ extracted hops) using supercritical fluids technology was investigated. Various temperatures, pressures and concentrations of ethanol (modifier) and the ratio (w/w) of solvent to material were tested in this study. The results of single factor and orthogonal experiments showed that at 50°C, 25 MPa, the ratio of solvent to material (50%), ethanol concentration (80%) resulted in maximum extraction yield flavonoids (7.8 mg/g). HPLC-MS analysis of the extracts indicated that flavonoids obtained were xanthohumol, the principal prenylflavonoid in hops. Project (No. Y304203) supported by the Natural Science Foundation of Zhejiang Province, China  相似文献   

Effects of fructose-1,6-diphosphate on concentration of calcium and activities of sarcoplosnic Ca^2＋-ATPase in cardiomyocytes of Adriamycin-treated rats   总被引：1，自引：0，他引：1  

Cai W  Chen JZ  Ruan LM  Wang YN 《Journal of Zhejiang University. Science. B》2005,6(7):622-625

Objective: To observe the effects of fructose-1,6-diphosphate (FDP) on serum levels of cardiac troponin 1 (cTnl) and creatine kinase-MB (CK-MB), as well as the concentration of calcium in cardiomyocytes (Myo[Ca2 ]) and activity of sarcoplosnic Ca2 -ATPase (SRCa2 -ATPase) in Adriamycin (ADR)-treated rats. Methods: Rats were intraperitoneally injected with ADR (2.5 mg/kg every other day for 6 times) and then with different dosages of FDP (every other day for twenty-one times). Bi-antibodies sandwich Enzyme linked immune absorption assay (ELISA) was performed to detect serum level of cTnl. CK-MB was detected by monoclonal antibody, Myo[Ca2 ] was detected by fluorescent spectrophotometry and the activity of SRCa2 -ATPase was detected by inorganic phosphate method. Results: FDP (300, 600, 1200 mg/kg) significantly reduced the serum levels of cTnl and CK-MB, while at the same time decreased calcium concentration and increased SRCa2 -ATPase activity in cardiomyocytes of ADR-treated rats (P<0.01). Conclusions: FDP might alleviate the cardiotoxic effects induced by ADR through decreasing calcium level as well as increasing SRCa2 -ATPase activity in cardiomyocytes.  相似文献   

“馆藏揭示+开放获取”模式下的专业性特色资源建设探究     

阮伟娟 《情报资料工作》2012,(4):53-56

文章结合天津高职院校图书馆基于"馆藏揭示+开放获取"的专业性特色资源数据库建设实践,就如何分析、梳理、提炼、整合、存储基于学校专业建设的馆藏信息资源以及如何挖掘、整合和利用具有专业特色的开放获取文献信息资源进行了探讨,旨在探索一条适合高职院校的专业性特色资源建设之路。  相似文献   

一种非完整移动机器人开环迭代学习控制研究     

阮玉镇  王武 《福建工程学院学报》2012,10(6):600-604

针对非完整移动机器人的轨迹重复跟踪问题,提出了一种开环P型迭代学习控制算法。首先给出非完整移动机器人的运动学模型,并结合离散时域对轨迹跟踪问题进行描述,然后设计迭代学习控制器并在给定条件下证明了其收敛性;MATLAB仿真结果表明,随着迭代次数的增加,该算法能够有效改善动态不确定环境中系统的稳定性与收敛的快速性。  相似文献   

面向职业技能发展的EPSS开发研究     

阮雁春  蔡春花 《远程教育杂志》2012,30(3):52-57

EPSS是为了提高工作绩效利用计算机技术开发的一种电子绩效支持系统,这种系统具有信息集成性、工作情境性、学习自主性、知识共享性等特点。职工利用它既可以实现在工作中学习,又可以实现在学习中工作的职业教育功能。在EPSS逐渐成为促进职业技能发展,提高企业组织或个人绩效的干预措施之后,EPSS的开发成为实现职业教育功能和绩效支持的关键。乔尼(Nguyen)和沃尔(Woll)创建了一种EPSS开发模型,该模型从绩效角度和学习角度提出开发EPSS要经过绩效分析、EPSS分析、EPSS设计、EPSS开发、EPSS的实施与评价等几个阶段。乔尼和沃尔创建的EPSS开发模型将职工培训、工作绩效以及技术支持有效地融合于整个开发过程中,对设计、开发EPSS的实践者提供了一个简洁、便于操作的参考模型。  相似文献   

艺苑奇葩——莆仙戏曲的发展与创新   总被引：1，自引：0，他引：1  

阮俊宇 《南昌教育学院学报》2012,(11):24-25

近年来,随着我国对外文化交流的增多,外来文艺形式大量涌入,当代青少年对传统地方戏曲已渐渐失去往日的热情,知音日渐减少。针对这种现象,立足于莆仙戏的剧本、唱腔音乐、舞台表演等方面,对莆仙戏音乐的继承、发展与创新提出看法。  相似文献   

浅谈课堂的有效性教学     

阮敏 《南昌教育学院学报》2012,(8):131-132

有效性课堂就是要从学生的学习需要出发进行教学设计,在教学过程中能充分调动学生的学习兴趣和参与课堂探究学习的积极性;能让学生在有限的时间内认知并感悟知识;能培养学生养成良好学习习惯的高效课堂就是有效性课堂。  相似文献   

Improving ranking performance with cost-sensitive ordinal classification via regression     

Yu-Xun Ruan  Hsuan-Tien Lin  Ming-Feng Tsai 《Information Retrieval》2014,17(1):1-20

This paper proposes a novel ranking approach, cost-sensitive ordinal classification via regression (COCR), which respects the discrete nature of ordinal ranks in real-world data sets. In particular, COCR applies a theoretically sound method for reducing an ordinal classification to binary and solves the binary classification sub-tasks with point-wise regression. Furthermore, COCR allows us to specify mis-ranking costs to further improve the ranking performance; this ability is exploited by deriving a corresponding cost for a popular ranking criterion, expected reciprocal rank (ERR). The resulting ERR-tuned COCR boosts the benefits of the efficiency of using point-wise regression and the accuracy of top-rank prediction from the ERR criterion. Evaluations on four large-scale benchmark data sets, i.e., "Yahoo! Learning to Rank Challenge" and "Microsoft Learning to Rank,” verify the significant superiority of COCR over commonly used regression approaches.  相似文献   

Effect of the amplification factor on seismic stability of expanded municipal solid waste landfills using the pseudo-dynamic method     

Xiao-bo Ruan  Shu-lin Sun  Wen-liang Liu 《浙江大学学报(A卷英文版)》2013,14(10):731-738

The evaluation of the seismic stability of an expanded municipal solid waste （MSW） landfill is very important in seismic prone zones. In this paper, the pseudo-dynamic method was used to calculate the average safety factor for the expanded landfill with a trapezoidal berm based on under-berm failure conditions. Furthermore, the effects of the variation of parameters such as the amplification factor, seismic coefficient, height of berm, angle of back slope of berm, and depth of waste mass at the back slope on the seismic stability of the landfill were studied. The results indicated that the influences of the vertical seismic coefficient, height of berm, and angle of the back slope of the berm on the seismic stability of the landfill are weakened as the amplification factor increases, but the influence of the horizontal seismic coefficient on the seismic stability of the landfill is strengthened. On the other hand, a certain ratio of the height of the waste mass above the back slope to the depth of waste mass at the back slope, or the reasonable consideration of the magnitude of the amplification factor will be conducive to the seismic design of the landfill. In addition, the results obtained by the pseudo-static and pseudo-dynamic methods were compared.  相似文献