首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   373篇
  免费   17篇
  国内免费   108篇
安全科学   19篇
废物处理   27篇
环保管理   50篇
综合类   198篇
基础理论   64篇
污染及防治   93篇
评价与监测   15篇
社会与环境   11篇
灾害及防治   21篇
  2023年   4篇
  2022年   24篇
  2021年   13篇
  2020年   20篇
  2019年   11篇
  2018年   15篇
  2017年   15篇
  2016年   26篇
  2015年   21篇
  2014年   28篇
  2013年   37篇
  2012年   29篇
  2011年   42篇
  2010年   29篇
  2009年   21篇
  2008年   26篇
  2007年   23篇
  2006年   15篇
  2005年   12篇
  2004年   8篇
  2003年   10篇
  2002年   9篇
  2001年   11篇
  2000年   11篇
  1999年   13篇
  1998年   3篇
  1997年   5篇
  1996年   6篇
  1995年   4篇
  1993年   5篇
  1990年   2篇
排序方式: 共有498条查询结果,搜索用时 15 毫秒
221.
目前国有企业在从传统人事管理向现代人力资源管理模式转变过程中遇到了改革受阻、效果不佳、观念落后、定位不高等问题,这些问题的产生主要是由于传统思想认识、落后的工作开发定位等根本性原因.因此,国有企业应采取树立新型大人力资源观念,加强人力资源管理部门自身建设,运用现代人力资源管理手段切实处理好培训开发、激励、评估等关键问题的改进对策.  相似文献   
222.
In China many investments especially from foreign companies are located in industry parks. However, the general situation and management perspectives of developing Chinese industrial parks are not very clear to the westerners. With the rapid development, industrial parks will play a key role in China's economy, therefore, those issues relating with China's industrial parks need to be further discussed. This paper is one of such efforts. It will review the development of China's industrial parks, including characterizing industry parks in China and discussing the main site selection criteria and important aspects for foreign investors. The main focus of this paper is to discuss the current environmental management practices of industrial parks because such parks have been main sources of pollution. New development strategy for industrial parks, such as eco-industrial development, should be considered and implemented.  相似文献   
223.
读书是学习,读树也是学习,是一种在户外感受自然、师法自然的学习,若能读出树的沧桑,听懂树的倾诉,那你的爱便是到了超凡脱俗的境界。   在北京麋鹿苑的户外生态教育活动中,有一个由二人进行的“读树”游戏,十分引人入胜。蒙面者在同伴的带领下,来到某棵大树前,通过用手触摸、用耳聆听、用心阅读,引发你对树木的亲和力,提高你对自然的感受力。做完游戏,你一定颇有感慨,那就请你一吐为快,与大家共享吧。   最近,美国自然教育家柯内尔来京教授了许多游戏,其中有一个叫“我的树”,是以人扮树,通过角色的转换,体验树的…  相似文献   
224.
With the implementation of reform and opening-up, the overall economy of China has made brilliant achievements; meanwhile, however, the economic disparity has been enlarging among some regions, and between the city and the countryside. The existence and evolution of this kind of economic disparity is concerned with social stability, sustainable development and the construction of harmonious society, which has gradually become the hotspot in social economic development. The West Coast of the Strait (WCS) located in southeast littoral areas is adjacent to the Pearl and Yangtze River Delta in the south and north and faces Taiwan Province in the east. The stability and development of this region has vital political and economic meaning in the social economic development of our country. It has important theoretical meaning and practical value to research the form, characteristics and evolution of regional economic disparity in the WCS. Based on insightful analysis on existing study results on the WCS, the paper defines the connotation and extension. By a series of absolute and comparative relative evaluation indexes and taking the WCS since 1992 as the study object, the paper makes analysis on different scales including three regions, four regions, 20 cities and 152 counties, quantitatively evaluates the level, characteristics and evolution of the regional economic disparity and compares the regional economic disparity on different scales. The main conclusions are as follows: the variation trend of the absolute disparity of the whole region is obvious and stable, which has presented an inflating trend; the comparative variation trend on a large scale has waved, The comparative disparity of the three regions increased annually from 1992 to around 2000, which had a decreasing trend from around 2000 to 2005; the comparative variation trend on a small scale was not stable, which showed an annual increase of four regions, 20 cities and 152 counties from 1992 to around 2003 and a decrease from around 2003 to 2005; the  相似文献   
225.
• The PNA, denitratation/anammox, and DAMO/anammox process are reviewed together. • Denitratation/anammox-based process is promising in mainstream treatment. • DAMO and denitratation processes realize the higher nitrogen removal efficiency. • The utilization of metabolism diversity of functional microbe is worth exploring. • An effective waste treatment system concept is proposed. Anammox technology has been widely researched over the past 40-year from the laboratory-scale to full-scale. It is well-known that in actual applications, the solo application of anammox is not feasible. Since both ammonium and nitrite are prerequisites based on the reaction mechanism, the pre-treatment of wastewater is necessary. With the combination of anammox process and other pre-treatment processes to treat the actual wastewater, many types of anammox-based processes have been developed with distinct nitrogen removal performance. Thus, in order to heighten the awareness of researchers to the developments and accelerate the application of these processes to the treatment of actual wastewater, the main anammox-based processes are reviewed in this paper. It includes the partial nitritation/anammox process, the denitratation/anammox (PD/A) process, the denitrifying anaerobic methane oxidation/anammox (DAMO/A) process, and more complex deuterogenic processes. These processes have made the breakthroughs in the application of the anammox technology, such as the combination of nitrification and PD/A process can achieve stability and reliability of nitrogen removal in the treatment of mainstream wastewater, the PD/A process and the DAMO/A have brought about further improvements in the total nitrogen removal efficiency of wastewater. The diversity of functional microbe characteristics under the specific condition indicate the wide application potential of anammox-based processes, and further exploration is necessary. A whole waste treatment system concept is proposed through the effective allocation of above mentioned processes, with the maximum recovery of energy and resources, and minimal environmental impact.  相似文献   
226.
Environmental Science and Pollution Research - A green and-easy to operate method, the microwave technology, was developed to promote the desulfurization process of phosphate rock, systematically...  相似文献   
227.
Environmental Science and Pollution Research - The hydrological conditions of river-connected lakes are complex primarily owing to their considerable water-level fluctuations (WLFs). Water quality...  相似文献   
228.
郭耕 《环境教育》2001,(6):41-41
展读新版法布尔的十卷本《昆虫记》,心绪仿佛一下回到那几乎是与虫为伍、以虫为乐的孩提时代。在工业化不太发达、农药化肥不太普及的30年前,我还是个小学生,记得那时生活环境中的昆虫五花八门、种类繁多,什么屎壳郎、磕头虫、花珠珠、花手绢、臭大姐、喇喇姑、知了、刀螂、天牛、马蜂、扑棱蛾子……不胜枚举,仅晴蜒就分老子儿、膏药、灰儿、黄二、黑锅底、红辣椒、小日本儿等,养点儿蛐蛐儿、油葫芦什么的,更是男孩子的拿手戏。那时,我是将昆虫当成玩意儿、当成伙伴儿,甚至有一回还因把一只大豆虫塞进女同学的铅笔盒、吓得她上课…  相似文献   
229.
With the increasing environmental issues, now cleaner production has been implemented across all the regions of China. During this process, regional governments have played a leading role for promoting cleaner production. Main measures include coordinating the various stakeholders, providing financial support, stipulating appropriate policies and conducting capacity building programs. Such an innovative initiative is quite unique and should be further studied. This paper reflects such a perspective through a case study of Liaoning province. We first introduce the main initiatives for the promotion of cleaner production in Liaoning and then identify the key barriers. Our focus is to provide suggestions for future improvements. Finally we make our conclusions.  相似文献   
230.
环保行为对于维持生态平衡,保护自然环境有着重要的意义,个人并非从小就有环保意识,需要多方面影响才能养成环保习惯。研究了从众心理对环保行为的影响,从积极影响和消极影响两个角度进行分析,政府加大治理力度,通过媒体等手段宣传环保意识,树立典型环保先锋,则会造成积极影响,社会群众会自发地从事环保行为,维持低碳生活;反之周围人缺少环保意识,浪费资源,则个体也会不重视保护环境,甚至为了个人利益做出破坏生态平衡的事情。从众心理对于环保行为有着关键性影响,必须要积极提倡大众养成环保意识,保护环境,从小做起,从个人做起,为其他人树立榜样  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号