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杨宏波 《黔东南民族师专学报》2005,23(6):29-31
介绍了portal服务器及其配置，portal技术的安全体系结构，最后通过一个基于web的portlet组件讨论了portal的工作原理． 相似文献
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杜民 《山东商业职业技术学院学报》2010,10(6):104-107
认证系统在校园网运营管理中起到非常关键的作用。文章阐述了校园网运营管理面临的问题,提出802.1X和web/portal二次认证系统方案。 相似文献
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根据高校数字化校园建设的需要,提出一个基于SOA架构的数字化校园门户的设计方案。结合portal技术设计统一门户入口、页面整合、角色访问控制、统一认证与单点登录、异构系统整合等,形成统一的SOA信息门户整体实施架构。实现资源整合,构建统一的用户管理、资源管理和权限控制,从而消除信息孤岛,方便校园用户应用及科学管理,降低门户实现和管理成本,提高工作效率。 相似文献
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The reinforcement effect of a reconstruction scheme for a steel factory building was investigated using finite element method and dynamic performance test. The workshop concerned is a portal frame structure with four spans and two slope roofs, of which ten columns need cutting for expanding span. The design and reconstruction pro- ject of column-cut supported by joist were introduced, which includes column reinforcement, connection rebuilding between brackets and crane beams, and the changing of rigid joint into hinge joint. The construction scheme was put forward in the light of the characteristics of the reinforcement and reconstruction. Spot test of dynamic performance on the workshop and comparison with theoretical analysis results show that the column-cut supported by joist design is effective and the reconstruction project is successful. 相似文献
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Oyelami Olufemi Moses 《美中教育评论》2008,5(11):22-27
More recent motivational research focuses on the identification of effective techniques for enhancing instructional design and meeting the needs of diverse student populations （Wlodkowski R. J., 1981）. Learning-motivation researchers are applying some of the same theories and concepts found to be effective in industry to the development of motivational models that enhance the teaching-learning environment. One of such models is the Attention Relevance Confidence Satisfaction （ARCS） model of motivational design developed by John M. Keller （Small Ruth V., 2007）. The continuous improvement in handheld devices technologies has led to a new learning paradigm called mobile learning which involves the delivery of learning contents to learners utilizing mobile computing devices. Handheld devices, however, have constraints which limit their use for effective learning. Towards improving the effectiveness of mobile learning is a new mobile learning model proposed by Shih on which instructional designs for mobile learning can be based to facilitate mobile learning design and to achieve better mobile learning outcomes （Yushin E. Shih ＆ Dennis Mills, 2007）. Shih＇s model is based on Graphical User Interface （GUI）. This paper presents an enhanced Shih＇s model for effective mobile learning outcome in a university environment by making provision for instructional design to include online library search for both e-books and audio books using collaborative filtering algorithm to aid the search and posting and reading of testimonials about positive mobile learning outcomes so as to encourage other mobile learners. It also incorporates the use of Voice User Interface （VUI） to access the learning portal in order to overcome mobile devices interface limitations in addition to Graphical User Interface （GUI） proposed by Shih, so as to cater for the learning needs of the blind and the visually impaired. 相似文献
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Background/aim:Currently, the liver is cold-preserved at 0～4 °C for experimental and clinical purposes. Here, we investigated whether milder hypothermia during the initial phase of the preservation period was beneficial for liver viability upon reperfusion. Methods:In the first set of experiments, rat livers were preserved either conventionally in clinically used histidine-trypthopan-ketoglutarate (HTK) solution (Group A:45 min and Group B:24 h) or by slow cooling HTK solution (from 13 °C to 3 °C) during the initial 45 min of preservation (Group C:24 h). In the second set of experiments, additional groups of livers were evaluated:Group BB—preservation according to Group B and Group CC—preservation according to Group C. Further, some livers were preserved at 13 °C for 24 h. Livers were then reperfused using a blood-free perfusion model. Results:Bile production was approximately 2-fold greater in Group C compared to Group B. Alanine transaminase (ALT) and aspartate transaminase (AST) release into perfusate were 2～3-fold higher in Group B compared to Group C. No significant differences were found in ALT and AST release between Group C and Group A. Livers in Group CC compared to Group BB exhibited significantly lower portal resistance, greater oxygen consumption and bromosulfophthalein excretion into bile and lower lactate dehydrogenase (LDH) release into perfusate. Histological evaluation of tissue sections in Group BB showed parenchymal dystrophy of hepatocytes, while dystrophy of hepatocytes was absent in Group CC. Livers preserved at 13 °C for 24 h exhibited severe ischemic injury. Conclusion:These results suggest that the conventional way of liver preservation is not suitable at least for rat livers and that slow cooling of HTK solution during the initial phase of cold storage can improve liver viability during reperfusion. 相似文献
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Kebis A Kukan M Grancic P Jakubovský J 《Journal of Zhejiang University. Science. B》2007,8(5):289-295
Background/aim： Currently, the liver is cold-preserved at 0-4 ℃ for experimental and clinical purposes. Here, we investigated whether milder hypothermia during the initial phase of the preservation period was beneficial for liver viability upon reperfusion. Methods： In the first set of experiments, rat livers were preserved either conventionally in clinically used histidine-trypthopan-ketoglutarate （HTK） solution （Group A： 45 min and Group B： 24 h） or by slow cooling HTK solution （from 13 ℃ to 3 ℃） during the initial 45 min of preservation （Group C： 24 h）. In the second set of experiments, additional groups of livers were evaluated： Group BB-preservation according to Group B and Group CC-preservation according to Group C. Further, some livers were preserved at 13 ℃ for 24 h. Livers were then reperfused using a blood-free perfusion model. Results： Bile production was approximately 2-fold greater in Group C compared to Group B. Alanine transaminase （ALT） and aspartate transaminase （AST） release into perfusate were 2-3-fold higher in Group B compared to Group C. No significant differences were found in ALT and AST release between Group C and Group A. Livers in Group CC compared to Group BB exhibited significantly lower portal resistance, greater oxygen consumption and bromosulfophthalein excretion into bile and lower lactate dehydrogenase （LDH） release into perfusate. Histological evaluation of tissue sections in Group BB showed parenchymal dystrophy of hepatocytes, while dystrophy ofhepatocytes was absent in Group CC. Livers preserved at 13 ℃ for 24 h exhibited severe ischemic injury Conclusion： These results suggest that the conventional way of liver preservation is not suitable at least for rat livers and that slow cooling of HTK solution during the initial phase of cold storage can improve liver viability during reperfusion. 相似文献
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自从会考的号令下了之后,中国传统教育界是展开了许多幕的滑稽的悲剧。
学生是学会考,教员是教人会考,学校是变成了会考筹备处。会考所要的必须教,会考所不要的就不必教,甚至于必不教。于是唱歌不教了,图画不教了,体操不教了,家事不教了,农艺不教了,工艺不教了,科学的实验不做了, 相似文献
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1.走着走着,就散了,回忆都淡了;看着看着,就累了,星光也暗了;听着听着,就醒了,开始埋怨了;回头发现,你不见了,突然我乱了。2.我的世界太过安静,静得可以听见自己的心跳。心房的血液慢慢流回心室,如此这般轮回。聪明的人喜欢猜心,也许猜对了别人的心,却也失去了自己的。傻 相似文献
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童年的一天,他在屋里玩,父亲沉默地坐在角落里。10分钟内,他做了11件事情:写了一个半字,画了一个没画成的苹果,看了几秒钟书,大叫了几声,踢翻了一个凳子,发呆半分钟,玩了三样玩具而且都扔到了门外,傻乎乎地唱了几句歌,欣赏了一下父亲没画完的画作,画了个女孩并哈哈大笑,最后发疯地叫了几声妈…… 相似文献
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王旭东 《教学月刊(中学下旬版)》2008,(3):48-50
"盼望着,盼望着,东风来了,春天的脚步近了","山朗润起来了,水涨起来了,太阳的脸红起来了",树绿起来了,小草青起来了,万物灵动起来了,我们的情思被惹起来了。朱自清眼里的春天"像刚落地的娃娃",像"花枝招展"的小姑娘,"像健壮的青年",是风和日丽、百花争艳、草长莺飞的季节。那你心目中的春天是怎样的, 相似文献
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嗨,亲爱的读者朋友们,大家好!在中国人的传统观念中,到了10月,基本上也算是到了年末了。想想也是,当收获的金秋过去之后,对于这一年而言,有什么更值得盼望的呢?大雁南飞了,这让人多少有些失落,可秋菊盛开了,那种芬芳更能沁人心脾!世间的一切总是这样,随着时光的流走,总要失去一些东西,也总会得到一些东西,要失去的很难挽回,但要得到的则可以去选择!同学们,随着一年年的过去,我们必将会不断地失去很多,而同时你又得到了什么?失去了童年你得到成长了吗?失去了依赖你得到自立了吗?失去了嫩弱你得到健壮了吗?失去了任性你得到责任了吗?失去了呵护你得到坚强了吗?失去了幼稚你得到智慧了吗?失去了童话你得到科学了吗……要失去的必定会失去,是否能得到的完全由你把握! 相似文献