论我国核电事业发展空间

论文就我国核电发展空间 ,从核能资源的可持续利用 ,环境、生态的可持续发展 ,核电发展规模 ,能源结构调整与布局 ,核安全战略组成 ,到核电国产化等多方面进行论述 ,从而阐明了我国核电未来发展的指导思想     

锂离子二次电池正极材料尖晶石型LiMn_2O_4的研究进展

近年来,锂离子电池因其优异的特性,发展十分迅速。锂离子电池的优异性能与电池的材料选择,材料的制备工艺等密切相关。正极材料LiMn2O4是近几年锂离子电池研究的热点,但其在循环过程中的容量衰减是制约锂离子电池商品化的关键。本文介绍了不同正极材料的结构、电化学性能、研究现状,侧重于阐述控制锂离子电池循环过程中可逆嵌锂容量和稳定性的嵌锂电极材料的结构性质。     

茶叶生产资料物流建设的探讨

从加强茶叶产业发展的角度,论述了提高茶叶经济效益的新途径——构建茶叶生产资料物流体系:提高茶叶生产资料物流意识;构建省、县、乡三级茶叶生产资料物流集散中心;建设以第三方物流为主体的茶叶生产资料物流体系;建立以计算机、因特网、电话等为基础的敏捷响应信息系统;构建茶叶加工(深加工)的回收与废弃物流体系等。     

英语教学材料的“真实”与“真实性”

交际法教学模式视“真实”为核心,教材设计编写也尽量体现真实。事实上,教学材料的真实和学习者真实性之间是存在一定差别的。仅有教学材料的真实不一定能够让学习者感到真实可信。在英语教学材料的设计编写以及选择使用时体现真实的较佳方式是关注学习者的需求,并灵活变通以实现“真实”与“真实性”的统一。     

巨磁电阻效应的非接触光学表征方法研究

根据自平均极限模型推导了在巨磁电阻薄膜中折射系数与自旋非对称因子的关系。用傅立叶变换红外光谱仪组建了磁折射效应测试装置,并测试了自旋阀多层薄膜(Si/PtMn/CoFe/Ru/CoFe/Cu/Co/NiFe)的磁折射效应。结果表明:在红外波段,可以用磁折射效应表征巨磁电阻效应。     

Stigma Happens: Social Problems in the Siting of Nuclear Waste Facilities

The paper by Metz challenges the view that stigma associated with a nuclear waste repository might lead to significant economic losses to the host region. We have been invited to comment on the general issues raised by this paper. We find that much of the evidence presented in the paper consists of factual and conceptual errors and misrepresentations of the research literature. Based on our review of evidence documenting the social and economic impacts of perceived risk, we conclude that stigma is an important phenomenon that is symptomatic of fundamental problems with the way in which nuclear waste facilities are sited.     

论如何培养学生的写作创新能力

本文就如何培养学生的写作创新能力的问题,提出了这样的观点:只有让写作回归生活,活话作文源头,形成创新意识何创造能力,才能使学生写出底蕴深厚、文质兼美的文章,才能使作文教学适应素质教育的要求。具体做法是:一、开掘生活源头,激活主体的创新能力。二、实现完满人格,培养主体的创新精神。三、审视社会文化,发展主体的创造能力。     

Managing Nuclear Waste from Power Plants

National strategies to manage nuclear waste from commercial nuclear power plants are analyzed and compared. The current strategy is to try to operate a repository at Yucca Mountain, Nevada, to dispose of high-level nuclear waste underground. The main alternatives involve temporary above-ground storage at a centralized facility or next to nuclear power plants. If either of these is pursued now, the analysis assumes that a repository will be built in 2100 for waste not subsequently put to use. The analysis treats various uncertainties: whether a repository at Yucca Mountain would be licensed, possible theft and misuse of the waste, innovations in repository design and waste management, the potential availability of a cancer cure by 2100, and possible future uses of nuclear waste. The objectives used to compare alternatives include concerns for health and safety, environmental and socioeconomic impacts, and direct economic costs, as well as equity concerns (geographical, intergenerational, and procedural), indirect economic costs to electricity ratepayers, federal government responsibility to manage nuclear waste, and implications of theft and misuse of nuclear waste. The analysis shows that currently building an underground repository at Yucca Mountain is inferior to other available strategies by the equivalent of $10,000 million to $50,000 million. This strongly suggests that this policy should be reconsidered. A more detailed analysis using the framework presented would help to define a new national policy to manage nuclear waste.     

Decision-Making, Time Horizons, and Risk in the Very Long-Term Perspective

Some decisions made today have far-reaching consequences as exemplified by those concerning nuclear power and spent nuclear fuel. The investigation presented here uses a decision theoretic framework in which time horizons and the discounting of negative consequences play significant roles. The results indicated wide variations in the lengths of the planning horizons judged to be adequate not only across a number of activities, including nuclear waste management, but also across groups of subjects (e.g., engineering students, retired people, and nuclear fuel experts). The paper reports typical judgments and correlations between different variables for different groups of subjects. The differences across groups reflect potential sources of conflict, depending in part on different values and different perceptions of more or less uncertain facts. Discounting functions for negative consequences in the future were also established. A range in differences in the speed of discounting were found and illustrated. Furthermore, it was found that substantial proportions in all groups regarded negative consequences related to nuclear waste as nondiscountable. When asked about the effect of time until outcome on acceptable probability of a negative outcome, many subjects used the probability concept in an incoherent way, illustrating the great difficulty in communicating small probabilities in a long-term risk context.     

从塑料工业的发展谈高分子材料与工程专业学生的就业状况和教学计划

文章结合塑料工业的重要地位、塑料工业的现状和发展趋势、广东工业大学高分子材料与工程专业毕业生的就业现状和必需的专业技能,分析了该专业的教学计划的合理性和改进方向.