扩招背景下提高实践教学质量的方法研究与实践     

官颂  张鹏  董艇舰  韩勇  魏国  朱江  潘亚东 《实验技术与管理》2011,28(8)

探讨了扩招背景下工程训练实践教学面临的机遇和挑战,对工程训练中提高教学质量的方法和途径进行了研究,提出了通过构建工程训练体系、实践教学保障体系和考核评价体系提高实践教学质量的思路,并结合整个教学团队的工作实践,阐述了在实践教学中的应用情况.  相似文献   

开放物理实验教学模式的探索与实践   总被引：3，自引：2，他引：1  

关寿华  郑建洲  张萍 《实验技术与管理》2011,28(Z1)

在广泛调研和总结经验的基础上,对大学物理实验开放教学模式进行了深入研究,形成比较可行的大学物理实验课程开放教学模式.通过设立创新工作室、网络实验室以及教学内容分层次等措施,实现了实验室硬件资源,实验教学活动在时间、空间和实验内容的深入开放,基本弥补了传统实验教学模式的不足.  相似文献   

探索高校实验室大型仪器设备管理新模式   总被引：4，自引：0，他引：4  

关丽萍  宋皓 《中国现代教育装备》2011,(1):21-23

高等学校大型仪器设备是从事教学、科研的重要条件和基本手段,是学校综合实力的体现。随着现代科学技术的迅猛发展,知识在经济发展中起到越来越重要的作用,使得高校大型仪器设备的管理显得尤为重要。结合工作实践,以及对目前高校实验室大型仪器设备管理及使用现状的分析,提出了加强高校大型仪器设备管理,提高大型仪器设备使用效率的若干措施。  相似文献   

关于Mordell方程y^2=x^3＋k     

管训贵 《山东教育学院学报》2011,26(5):117-118

设l,l1,l2,…,ls为任意整数,n为正整数,n1,n2,…,ns为任意非负整数．用初等数论方法证明了：如果k满足k=（4l＋2）^3-Пi=1^s（4li＋1）^2ni或k=（4l＋3）^3-2^2nПi=1^s（4li＋1）^2ni,则Mordell方程y^2=x^3＋k无整数解．  相似文献   

Enabling Mg metal anodes rechargeable in conventional electrolytes by fast ionic transport interphase     

Ruijing Lv  Xuze Guan  Jiahua Zhang  Yongyao Xia  Jiayan Luo 《国家科学评论(英文版)》2020,7(2):333

Rechargeable magnesium batteries have received extensive attention as the Mg anodes possess twice the volumetric capacity of their lithium counterparts and are dendrite-free. However, Mg anodes suffer from surface passivation film in most glyme-based conventional electrolytes, leading to irreversible plating/stripping behavior of Mg. Here we report a facile and safe method to obtain a modified Mg metal anode with a Sn-based artificial layer via ion-exchange and alloying reactions. In the artificial coating layer, Mg₂Sn alloy composites offer a channel for fast ion transport and insulating MgCl₂/SnCl₂ bestows the necessary potential gradient to prevent deposition on the surface. Significant improved ion conductivity of the solid electrolyte interfaces and decreased overpotential of Mg symmetric cells in Mg(TFSI)₂/DME electrolyte are obtained. The coated Mg anodes can sustain a stable plating/stripping process over 4000 cycles at a high current density of 6 mA cm⁻². This finding provides an avenue to facilitate fast ion diffusion kinetics of Mg metal anodes in conventional electrolytes.  相似文献   

Understanding divergent domestication traits from the whole-genome sequencing of swamp- and river-buffalo populations     

Xier Luo  Yu Zhou  Bing Zhang  Yi Zhang  Xiaobo Wang  Tong Feng  Zhipeng Li  Kuiqing Cui  Zhiqiang Wang  Chan Luo  Hui Li  Yanfei Deng  Fenghua Lu  Jianlin Han  Yongwang Miao  Huaming Mao  Xiaoyan Yi  Cheng Ai  Shigang Wu  Alun Li  Zhichao Wu  Zijun Zhuo  Do Da Giang  Bikash Mitra  Mohammad Farhad Vahidi  Shahid Mansoor  Sahar Ahmed Al-Bayatti  Eka Meutia Sari  Neena Amatya Gorkhali  Sigit Prastowo  Laiba Shafique  Guoyou Ye  Qian Qian  Baoshan Chen  Deshun Shi  Jue Ruan  Qingyou Liu 《国家科学评论(英文版)》2020,7(3):686

Domesticated buffaloes have been integral to rice-paddy agro-ecosystems for millennia, yet relatively little is known about the buffalo genomics. Here, we sequenced and assembled reference genomes for both swamp and river buffaloes and we re-sequenced 230 individuals (132 swamp buffaloes and 98 river buffaloes) sampled from across Asia and Europe. Beyond the many actionable insights that our study revealed about the domestication, basic physiology and breeding of buffalo, we made the striking discovery that the divergent domestication traits between swamp and river buffaloes can be explained with recent selections of genes on social behavior, digestion metabolism, strengths and milk production.  相似文献   

对中国档案学理论原创性研究的思考   总被引：1，自引：2，他引：1  

管先海 《档案管理》2005,(1):17-18

本文就中国档案学理论原创性研究的内涵和意义、中国档案学理论原创性研究判断的理论标准和实践标准、中国档案学理论原创性研究不足的原因以及如何增强中国档案学理论研究的原创性问题谈了个人认识。  相似文献   

电子政务环境下档案资源整合与共享之瓶颈分析   总被引：1，自引：0，他引：1  

蒋冠  何振 《北京档案》2005,(3):33-34,36

一、档案信息资源管理瓶颈 1、档案资源的质量难以控制.从档案信息资源管理与档案信息服务的目标来说,要实现档案资源的整合与共享,档案部门面临着一个如何对所拥有的大量档案信息资源进行有机整合,建构高质量的档案信息资源库,以充分满足各种用户对档案资源质和量上的需求的问题.然而,这并非易事.一方面,就目前的情况来看,我国大部分公共档案馆馆藏结构十分单一,政府部门的文书档案占了很大的比例,而其他类型的档案少之又少,特别是某些特色档案更是缺乏.另一方面,档案资源与其他社会信息资源相比,有着机密性的特点,有一大部分档案因为涉及到国家集体的秘密而不能轻易地在网上公布,必须履行一定的手续,超过一定的期限才可以公之于众,而事实上,等到这些档案过了保密期之后,其所载信息往往已经过时滞后,无法满足公众的现时需要.因此,如何处理这一问题,尽量消除档案信息的供求矛盾,也是当前档案资源整合与共享中的一个难题.  相似文献   

可持续发展与民营院校图书馆     

覃冠 《图书馆论坛》2005,25(5):91-93

阐述了可持续发展的内涵，强调了科教兴国战略对可持续发展的重要作用。并在肯定民营院校及其图书馆的主流作用的基础上，针贬了其与可持续发展战略严重背离的种种现象，最后提出了相应的对策。  相似文献   

Children's motivation in elementary physical education: an expectancy-value model of achievement choice     

Xiang P  McBride R  Guan J  Solmon M 《Research quarterly for exercise and sport》2003,74(1):25-35

This study examined children's motivation in elementary physical education within an expectancy-value model developed by Eccles and her colleagues. Four hundred fourteen students in second and fourth grades completed questionnaires assessing their expectancy-related beliefs, subjective task values, and intention for future participation in physical education. Results indicated that expectancy-related beliefs and subjective task values were clearly distinguishable from one another across physical education and throwing. The two constructs were related to each other positively. Children's intention for future participation in physical education was positively associated with their subjective task values and/or expectancy-related beliefs. Younger children had higher motivation for learning in physical education than older children. Gender differences emerged and the findings provided empirical evidence supporting the validity of the expectancy-value model in elementary physical education.  相似文献