关于入学率与平均预期受教育年限的思考

探讨平均预期受教育年限、平均受教育年限与入学率的关系。平均预期受教育年限完全取决于教育发展程度，可以由衡量教育普及程度的入学率测算。我国的平均预期受教育年限不到11年，提高平均预期受教育年限有一定的空间。探讨提高我国平均预期受教育年限的几种方案。     

Effect of flushing on the detachment of biofilms attached to the walls of metal pipes in water distribution systems

Biofilm detachment caused by flushing can result in secondary contamination in drinking water distribution systems (DWDSs). To evaluate the impact of flushing on biofilm detachment, actual water supply pipes including ductile cast iron pipes (DCIPs), gray cast iron pipes (GCIPs), and stainless steel compound pipes (SSCPs) were used in this study. Real-time quantitative polymerase chain reaction and 454 pyrosequencing were used to quantify bacteria and analyse microbial community composition, respectively. The results showed that the pipe material greatly influences the resistance of a biofilm to flushing. Biofilms attached to DCIPs were able to resist quite strong flushing, while those attached to GCIPs and SSCPs were sensitive to flushing. Both flush-resistant and flush-sensitive bacteria were present in all the biofilms, but their frequency differed among the different metal pipes. Thus, the resistance to flushing of bacteria is related not only to the nature of the bacteria, but also to the pipe material. Although flushing can remove some of the biofilm and may be a good way to clean the DWDS, the shear stress needed to remove the biofilm differs among different pipe types. The results of this study provide technical support for the management and operation of DWDS.     

职业院校大学生多媒体技术与网络应用倾向调查与思索

该文通过对职业院校大学生对多媒体技术与网络使用倾向的问卷调查,分析这两种技术对当代大学生在学习中的影响,并认为在课程设置与教学上应加强多媒体和网络技术使用的实施.     

对高校后勤社会化改革实践与探索中几个关系问题的思考

高校后勤社会化改革是当前我国高等教育改革的重要组成部分。这项改革的顺利与否、成功与否决定着高等教育的发展与壮大。因此，本从改革的重要性入手，分析和提出了当前后勤社会化改革中应重点处理和把握的几个关系，是在改革的实践与探索中的理论升华。     

青少年网德培养的美学思考

随着信息技术的飞速发展,网络对社会生活的影响日渐明显,网络被称为没有围墙的大课堂,已成为青少年学习知识、交流思想、休闲娱乐的重要平台,有人称当代青少年为“网上的一代”。但各种问题也相应而来,如何进行青少年网德培养值得我们深思。本文试图从美学角度切入,分析网德培养的现状,寻求策略。     

中共八大为什么不提"毛泽东思想"

中共八大不提"毛泽东思想"是党中央和毛泽东的一致决定,是社会主义阵营客观政治形势所迫,而非主观愿望,并不意味着对这一提法的否定.中央反对个人崇拜,但并不认为党内存在个人崇拜.毛泽东则认为有正确的和不正确的两种个人崇拜,前者是必需的.     

任务强度差异支架对学生游戏化学习动机和沉浸感的影响

教育游戏的研究者发现,教育游戏中添加教学策略或学习支架能够帮助学生建立游戏和学科知识之间的联系,可以有效发挥游戏的教育价值,提高学生的学习效果和学习体验。本研究在梳理学习支架理论的基础上,针对"The Tiny Bang Story"游戏设计了两种不同强度的任务支架,以研究强度不同的任务支架对不同认知风格学生的学习动机和沉浸感的影响。研究发现:任务强度不同的学习支架对不同认知风格学生的学习动机和沉浸感的影响存在显著差异;场依存型学生的学习动机和沉浸感会随任务支架强度的增加而提升;场独立型学生的学习动机随任务支架强度的增加没有显著性变化,反而沉浸感会随任务支架强度的增加呈现先升后降的正三角趋势。     

《经济数学基础》试题评价分析

本文对1999年1月、1999年3月、2000年1月及2000年7月考试的《经济数学基础》四份试题进行了统计，总结了考试要点，并作评价与分析，对今后的教学提出一些建议。     

Wave protection effect of periodic row of bottom-hinged flap-type wave energy converters

A flap-type wave energy converter (WEC) is combined with a nearshore breakwater to expand the application of WECs both economically and environmentally. Based on the linear potential theory, an eigenfunction expansion solution is developed for a periodic row of bottom-hinged flap-type WECs exposed to normal waves. Additionally, the viscous effect is considered using the ship rolling solution method with a viscous damping term included in the equation of motion, and the viscous damping expression is also described. The proposed solution is verified by comparison with published literatures. The results including the wave energy conversion efficiency, the reflected and transmitted proportion of the incident wave energy are presented for a range of wave periods and geometric ratios. It is demonstrated that better wave protection effects can be attained with smaller gaps between the WECs, where the transmitted proportion of the incident wave energy is lower. An optimal geometric ratio thus exists for a given wave power absorption and a specific wave period.     

Jordan域边界的拟等距扩张

本文证明了Ｊｏｒｄａｎ域的边界上的拟等距映照在一定条件下可以扩张为Ｄ上的拟等距映照，该结果是Ｆ．Ｗ．Ｇｅｈｒｉｎｇ的对应的平面结果的空间拓广．