C3H6 同分异构体电子散射总截面的计算

我们提出了一个可加性规则的半经验公式，并且运用该公式对10-300eV时C3H6同分异构体电子散射总截面进行了计算。计算结果表明，该方法简单有效，与实验结果符合得较好。     

EWB仿真软件与Protel制版的接口技术的实现

在电子线路课程设计中,电子工程设计人员都要用到EWB和PROTEL软件。EWB是专业设计仿真软件,而PROTEL是制版软件,实际设计中,常常需要两者结合使用。本文介绍了EWB仿真软件到PROTEL电路制版的工作流程和用PROTEL制版EWB的接口技术。     

用EWB仿真电子实验

介绍了EWB软件的功能及实验方法，并结合具体实例探讨了其在电子技术实验教学中的应用．     

IPv6扩展头格式详解与应用分析

详细地描述IPv6各个扩展头的格式、含义和用途。     

IPv6网络部署模型浅析

随着网络的扩张,IPv4地址已然枯竭,规模化发展IPv6已成必然。文章对IPv6技术做了简要介绍,提出了一系列网络部署模型,并分析其特点和优缺点,为IPv6网络的部署的架构提供了参考依据。     

地方公共实训中心6S现场管理与学员职业素养的培养——以湖州市公共实训中心为例

地方公共实训中心是提高职业培训和培养技能水平的重要平台,主要面向区域内各类职业院校、社会培训机构和企业开放。6S现场管理方法体现了国际先进企业的内涵管理,带来整洁的现场,并提升员工自主管理的素养,营造舒适、安全的现场环境。地方公共实训中心引入6S现场管理可提升学员行业标准化、高效率工作、安全、改善工作环境等职业素养等,使得公共实训中心培养的技能人才与企业接轨,适应企业先进、高效、安全的生产。     

Up-regulation interleukin-6 and interleukin-8 by activated protein C in lipopolysaccharide-treated human umbilical vein endothelial cells

Objective： To investigate the effect of activated protein C （APC） on inflammatory responses in human umbilical vein endothelial cells （HUVEC） stimulated with lipopolysaccharide （LPS）. Methods： The second passage of collagenase digested HUVEC was divided into the following groups： serum free medium control group （SFM control）, phosphate buffer solution control group （PBS control）, LPS group with final concentration of 1 μg/ml （LPS group）, APC group with final concentration of 7 μg/ml, Pre-APC group （APC pretreatment for 30 min prior to LPS challenge）, and Post-APC group （APC administration 30 min after LPS challenge）. Supernatant was harvested at 0, 4, 8, 12 and 24 h after LPS challenge. Interleukin-6 （IL-6） and Interleukin-8 （IL-8） levels were analyzed with ELISA. Cells were harvested at 24 h after LPS challenge, and total RNA was extracted. Messenger RNA levels for IL-6 and IL-8 were semi-quantitatively determined by RT-PCR. Results： Compared with control group, IL-6 and IL-8 levels steadily increased 4 to 24 h after LPS stimulation. APC treatment could increase LPS-induced IL-6 and IL-8 production. The mRNA levels of IL-6 and IL-8 exhibited a similar change. Conclusion： APC can further increase the level of IL-6 and IL-8 induced by LPS. The effect of these elevated cytokines is still under investigation.     

The degree to which UAE primary science workbooks promote scientific inquiry

This research investigated Grades 5 and 6 science workbooks for the degree to which they promote scientific inquiry abilities, opportunities that students had to acquire these abilities and the obstacles hindering students from implementing them. A document review technique and a constant comparative method were applied sequentially. A total of 58 instigative logs were scrutinized. Findings revealed that while the activities allowed students to use appropriate techniques and tools to collect and interpret data, and use their inquiry abilities related to implement investigation plans, they did not allow students real opportunities to formulate questions, plan for simple investigations, write conclusions, or communicate investigations. A total of 15 Grade 5 and 6 science teachers were asked to report their perceptions of the students’ role in implementing identified abilities. A one‐way analysis of variance revealed that there was a significant difference between students who individually implemented the inquiry abilities and students who were supported by the teacher or by other students. Obstacles that hindered students from implementing identified inquiry abilities included teachers’ intensive supports, students’ limited background or skills, and materials and instrument shortages. The study concluded with recommendations for policy, practice, and future research.     

从第六届大学生运动会看我国高校高水平运动队

通过对参加中华人民共和国第六届大学生运动会乙组比赛的高校高水平运动队进行广泛的调查,得出我国高校高水平运动队经过十多年的建设,虽有了较大的进步,但是还是存在招生过于集中、办队目的不明确、训练质量较低、资金投入少等问题。针对上述现状,笔者提出若干发展对策与建议,旨在推动高校运动队的发展。     

P2P技术发展浅析

对等联网(P2P)技术对于未来网络世界将产生深远的影响。用户利用P2P技术上网,可以充分享用互联网的边缘资源;P2P重返“非中心化”将使互联网管理的难度进一步增加,引起了众多的安全与管理争议。IPV6上的P2P模式能最终解决网络上的安全管理问题。