在线学习系统的数据库高可用性研究   总被引：1，自引：0，他引：1  

王赞  刘金兰  孟少卿 《现代教育技术》2009,19(9):95-97

文章通过Linux HA组件与DB2 HADR(High Availability and Disaster Recovery)组件相结合的方式实现在线教学系统的数据库高可用性方案。首先介绍了HADR实现DB2的双机热备,并分析了HADR自身存在的无法自动切换问题,然后提出了结合HA和HADR实现DB2数据库自动切换的解决方案,并对方案中出现的特别问题提出了解决办法。为提高在线学习系统的可用性提供了数据库保证。  相似文献   

网络时代的"麦哲伦"——从文化研究的四个研究模式看博客文化   总被引：1，自引：0，他引：1  

邹赞 《伊犁教育学院学报》2006,19(4):85-89

博客文化是一种新兴的网络文化,也是一种多元化的大众文化.把博客作为一种文化来研究,显然是从“文化研究“的视域出发的.借用文化研究的模式,可以对博客文化做出较全面地阐释:从“生产(者)中心论模式“探讨博客文化生产者的文化身份及博客文化的生产目的;从“受众中心论模式“探讨博客文化受众与生产者的互动关系,并从博客受众的亚文化结构入手,解析其受众的文化身份与接受心理;以“文本中心论模式“为着眼点,探讨博客文化的私人性与公共性,博客文化的叙事策略与叙事方法;从“文化情境研究模式“出发,探讨博客文化与主流文化的关系,并结合后现代语境及消费文化的特点,质疑博客文化的内涵.  相似文献   

Affect in Mathematics Education: An Introduction     

Rosetta Zan  Laurinda Brown  Jeff Evans  Markku S. Hannula 《Educational Studies in Mathematics》2006,63(2):113-121

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在W2K中强化802.11无线网络安全性     

章忠宪 《黄山学院学报》2003,5(2):87-88

无线网络是术，才能确保安全性。本笔简要分析了802目前最热门的网络技术之一，但其安全性功能相对较少，须借助其它的网络安全技．11 WLAN安全性缺陷，分析了Windiws网络中WLAN不同接入内部网络的方式及其安全技术特点．具体说明了在W2K中强化802．11无线网络安全性网络结构设计、服务器端的PPTP、L2TP IPSec设置和无线客户端的设置。  相似文献   

Modeling of human colonic blood flow for a novel artificial anal sphincter system     

Zan P  Yan GZ  Liu H 《Journal of Zhejiang University. Science. B》2008,9(9):734-738

A novel artificial anal sphincter system has been developed to simulate the normal physiology of the human anorectum. With the goal of engineering a safe and reliable device, the model of human colonic blood flow has been built and the relationship between the colonic blood flow rate and the operating occlusion pressure of the anorectum is achieved. The tissue ischemia is analyzed based on constitutive relations for human anorectum. The results suggest that at the planned operating occlusion pressure of less than 4 kPa the artificial anal sphincter should not risk the vaseularity of the human colon.  相似文献   

"3+5"城市群城市竞争力研究     

王亚茹  李峰生  马赞 《南阳师范学院学报》2008,7(6)

从经济竞争力、基础设施竞争力、科技文化竞争力、对外开放竞争力、环境竞争力5个方面,选取了31项指标构建了城市竞争力的评价体系。运用主成分分析方法,对“3＋5”城市群的城市竞争力进行了评价,并对加快城市群发展提出了建议意见。  相似文献   

城市景观设计与历史文化传统的挖掘     

张展 《安顺师范高等专科学校学报》2007,9(4):53-54

城市在发展,社会在进步,一个城市同样也在不停被设计着,建设着.作为设计者,应该在设计思想上,理念上挖掘深层的历史文化传统,带着慎重的思维去利用和规划前人留下的遗产的同时,更应考虑为后人留下更丰富的历史文化.我们设计的不只是一个建筑,一尊雕塑,而是一种元素,一种符号,一种文化,一种延绵不断的历史.  相似文献   

NAEYC Accreditation and High Quality Preschool Curriculum     

Betty Zan 《Early education and development》2005,16(1):85-104

In 1999, the Governing Board of the National Association for the Education of Young Children (NAEYC) appointed a commission to review NAEYC accreditation. Among the commission's recommendations is the goal of making NAEYC accreditation the standard-bearer of program excellence. While NAEYC accreditation is often used to support a claim that a program provides high-quality early care and education, this is not always the case. Under current accreditation criteria, a program can obtain NAEYC accreditation yet fall short of meeting the NAEYC guidelines concerning developmentally appropriate curriculum. This article analyzes current accreditation guidelines concerning the curriculum and reports results of a recent evaluation of 116 NAEYC-accredited preschool classrooms. While the mean total ECERS-R score was 5.77, classrooms exhibited a wide range of scores from inadequate to excellent on 11 curriculum-related items. Thirty-four classrooms scored in the inadequate or minimal range (1-3) on at least one of the curriculum-related items, and 18 scored in this range on 4 or more of these items. Results are used to support the position that currently, NAEYC accreditation criteria do not adequately address the quality of the curriculum. Finally, the paper evaluates the draft accreditation criteria and makes recommendations concerning the future of NAEYC accreditation.  相似文献   

Constructivist Early Education for Moral Development     

Rheta DeVries  Carolyn Hildebrandt  Betty Zan 《Early education and development》2000,11(1):9-35

In this article, we examine the role constructivist teachers play in fostering moral development in young children. Drawing on Piaget's theory and related empirical research, we trace the development of perspective-taking, autonomy, and self-regulation, and examine the effects of different teaching and parenting practices on children's moral development. We then provide examples of autonomous moral reasoning and behavior in preschool and early primary grade children, and describe how teachers can promote optimal moral development through establishing a sociomoral atmosphere in which mutual respect is continually practiced.  相似文献   

“十五”期间洛阳林业发展策略论     

白选杰  张赞平  王长忠  张玉平 《洛阳师范学院学报》2001,20(5):122-127

分析了“九五”期间洛阳市林业发展存在的主要问题 ,阐述了“十五”期间洛阳市林业发展的指导思想和目标任务 ,论述了“十五”期间洛阳市不同林业区域、不同重点工程和不同林业基地的建设策略 ,提出了“十五”期间加速洛阳市林业发展的主要措施 .  相似文献