Special issue on toxic metal pollution

Metals and metalloids are an integral part of the Earth’s crust.Some of these elements are of great concern due to their high toxicity and threat to humans,wildlife,and the ecosystem.For simplicity,the term toxic metals is adopted to represnt both     

南昌滕王阁明清庾楼群汇考——江右史话批判之四

本文通过地毯式发掘、排比明、清江右省、府、州、县、厅<官志>"省会水次漕仓"原始档案,系统还原明、清两代五个半世纪间.南昌章江水次五十余县邸阁漕仓"望江楼"群密集汇聚历史原貌;率先揭举明景泰三年又嘉靖六年江右官宪挪移高安等县废仓直接改筑滕王阁之滕学建筑秘史;并深刻揭示汉晋邸阁隋唐转型运动虽降至明、清,仍不断重复其农业文明仓储文化遗传基因漕仓邸阁/名胜楼阁/会馆公寓等社会政治、经济、文化三重复合身份循环转换的生命轮回模式;全面辩证洪州滕王阁原生态邸阁历史文化圈自然、人文、经济地理学核心价值;穿透封建史学迷雾与江右史话泡沫,复原千古名楼滕王阁庐山真面目.     

打造团队精神 提高企业执行力

在企业飞速发展的时代,执行力对一个企业的发展起着越来越重要的作用,它将是构成企业竞争力的重要组成部分,从而成为决定企业成败的一个重要因素。     

浅谈如何培养技校学生学习电工学课程的兴趣

根据技校学生的现状和笔者的教学体会,要想全面提高教学质量.必须重视培养学生的学习兴趣,改变传统的教学模式,因材施教,循序渐进,创建良好的师生关系,激发学生学习的热情和兴趣.     

Effect of intermittent aeration on the treatment performance in a submerged membrane bioreactor

In order to improve removal for nitrogen in a pilot-scale submerged membrane bioreactor (SMBR), intermittent aeration was conducted, and the effect on the treatment performance under four kinds of operation condition (run 1, continuous aeration; run 2, 60/60 min aeration on/off time; run 3, 60/90 min aeration on/off time; run 4, 60/75 min aeration on/off time) was evaluated. The results showed that depending on the specific on/off of the aeration time ratio, removal efficiency of nitrogen could be improved significantly, and the removal rates of total nitrogen (TN) under different operation conditions were 28.0%, 59.5%, 66.8% and 70.7%, respectively. There were no obvious differences for removal rates for COD_Cr and ammonia among different operation conditions. In general, intermittent aeration could be used as a feasible way to improve treatment performance for nitrogen in the SMBR.     

The impact of warrants introduction: Sign effect or magnitude effect?

The data of warrants underlying stocks was selected for the sample period from August, 2005 to December, 2009. These data the authors collected did not include the announcement date of reform of non-tradable underlying shares, and was available from Shanghai and Shenzhen stock exchanges. The event study method is employed to test the magnitude effect based on the Wild bootstrap, which is performed on the abnormal return, the cumulative abnormal return, and the standardized cumulative abnormal return. Empirical results show no evidence of magnitude effect but sign effect after warrants introduction. The authors argue that this phenomenon is caused by the migration of radical agents from stock market to warrant market.     

贵州红粘土的工程特性研究

贵州为典型的喀斯特地貌,广泛分布的碳酸盐岩、亚热带的温湿季风气候,为红粘土的形成提供了良好条件,文章结合工程实际描述了贵州红粘土的工程特性以及研究。     

庄子忠孝观的学理解析

庄子关注人生,受儒家思想的影响,认识到忠孝在社会存在的必然性。庄子从名实和真假关系出发,批判了世俗错误的忠孝观,提出了"不用而寓诸庸"的践行忠孝的方法。庄子理想的忠孝观是"入于寥天一"。     

绿色理念与室内设计的融合

"绿色设计"理念下的建筑是对环境无害,能充分利用自然资源,并且在不破坏环境基本生态平衡条件下建造的一种建筑.文章首先介绍了绿色设计理念在室内设计中的应用要点,并阐述了绿色设计理念下的建筑室内设计内容等.     

弗莱明对科学技术的贡献

本文简述了弗莱明的生平,回顾了他在爱迪生效应的基础上深入研究,适应无线电报发展的需要,发明真空二极管的经历,并介绍了他在科学技术上的其他贡献,说明了他的灵感来自于长期的积累,他的勤奋努力和严谨作风值得后人学习.