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   311篇
  免费   40篇
  国内免费   64篇
安全科学   26篇
废物处理   7篇
环保管理   41篇
综合类   171篇
基础理论   87篇
污染及防治   34篇
评价与监测   16篇
社会与环境   17篇
灾害及防治   16篇
  2023年   2篇
  2022年   5篇
  2021年   8篇
  2020年   15篇
  2019年   15篇
  2018年   5篇
  2017年   7篇
  2016年   8篇
  2015年   19篇
  2014年   16篇
  2013年   35篇
  2012年   25篇
  2011年   21篇
  2010年   21篇
  2009年   21篇
  2008年   12篇
  2007年   20篇
  2006年   16篇
  2005年   6篇
  2004年   15篇
  2003年   28篇
  2002年   24篇
  2001年   13篇
  2000年   13篇
  1999年   11篇
  1998年   7篇
  1997年   5篇
  1996年   7篇
  1995年   3篇
  1994年   2篇
  1993年   1篇
  1992年   1篇
  1991年   3篇
  1985年   3篇
  1983年   1篇
  1982年   1篇
排序方式: 共有415条查询结果,搜索用时 15 毫秒
381.
自然资源的非传统性开发是一个新的概念,包括非传统资源的开发和传统资源的非传统利用途径的开发两方面的内容。自然资源的非传统性开发的重大意义是:不断扩大自然资源开发的范围,向自然资源开发利用的广度和深度进军,促进地区经济建设的发展,充分发挥我国或一个省特有、珍稀自然资源的优势,增强竞争地位和能力;丰富自然科学的理论和技术,增加科学积累,促进国际学术交流。本文还着重讨论了自然资源非传统性开发的准备工作,非传统资源开发的实例和传统资源的非传统利用技术途径。  相似文献   
382.
随着环境污染形势的加剧、社会民众环保意识的提高,环境维权开始在中国逐渐发展起来,虽然目前仍处于初级阶段,面临着诉讼维权困难、相关体制不健全等众多问题,但环境维权在新形势下已经呈现出诸多新的特征.本文通过对常州外国语学校"常外"事件进行分析,阐述了中国目前环境维权事件所具备的新特征,并在此基础上,从转变政府职能、拓展利益诉求渠道、加强法治力度三个角度出发,对政府管理提出相关建议,希望能够完善环境维权制度、促进环境维权在中国的健康发展.  相似文献   
383.
无费低费方案的实施是清洁生产成功的关键   总被引:5,自引:0,他引:5  
叙述了我国目前清洁生产审核试点阶段出现的问题,认为根源在于未能有效地执行清洁生产审核中提出的无费低费方案,并提出了解决这些问题的方法。  相似文献   
384.
中国环保产业运行机制论   总被引:1,自引:0,他引:1  
本文从环保产业运行机制的理论依据入手,阐述新世纪中国环保产业化的必然性和推进环保产业化的必要性,再从宏观、中观和微观层面设计中国现代环保产业的运行机制。  相似文献   
385.
This paper evaluates the real effects of environmental justice reform on environmental governance at the firm level. Using the establishment of environmental courts in China as a quasi-natural experiment, our difference-in-differences estimation shows that: (1) environmental courts significantly enhance environmental investment by firms, and this relationship is robust to different specifications and alternative measures; (2) three possible channels are the improved levels of justice and enforcement of environmental protection, and the mitigation of local government intervention; (3) our findings are particularly pronounced in subsamples with severe local protectionism, state-owned enterprises (SOEs), and non-SOEs with political connections; (4) at the city-level, environmental courts significantly increase air quality and promote cities to cross the inflection point of the environmental Kuznets curve earlier. Overall, this paper reveals the micro-mechanisms behind the real effects of environmental justice on firm environmental investment, thus providing timely implications for regulators concerned with environmental protection.  相似文献   
386.
This study, based on situational crisis communication theory and set in the context of the Syrian refugee crisis, seeks first to conduct a comparative analysis of the management of online citizen engagement by local governments and non‐governmental organisations (NGOs). Second, it aims to examine the relationship between certain factors pertaining to the types of responses submitted by citizens via the social media of the aforementioned actors. The sample is composed of several Spanish local governments and NGOs belonging to Red de Municipios de Acogida de Refugiados (Local Government Network for Refugee Allocation). The main findings are that NGOs' online engagement with citizens is more than that of local governments. Notably, NGOs are much more active on their Facebook pages than are local governments. The two actors converge, though, in terms of disseminating instructive information and paying less attention to ‘basic crisis response options’. Moreover, the factors ‘content type’, ‘reputation’, and ‘woman’ affect the type of response messages sent by citizens.  相似文献   
387.
Very polar oil compounds are predominant in the resulting water soluble fraction (WSF) of crude oil, in agreement with their high solubility in seawater. Non‐volatile hydrocarbons represent only a low proportion of total soluble extracts.

The experimental process we have achieved allows us to obtain quantitative and reproducible soluble oil extracts that could be used in ecotoxicological tests and for the study and the characterization of marine oil pollution.  相似文献   
388.
The solubility data for a series of non‐hydrogen bonding, monosubstituted benzenes in binary mixtures of water and non‐hydrogen bonding cosolvents is presented. Good correlation between log solubility and fraction cosolvent is obtained, therefore the estimation of solubility in mixed solvents by a log‐linear relationship can be attained. Slight positive or negative deviations from predicted solubility values are seen at high volume fractions of cosolvents. These deviations are attributed to the cosolvent‐water interactions.  相似文献   
389.
This paper documents current understanding of acceptance as a security management approach and explores issues and challenges non‐governmental organisations (NGOs) confront when implementing an acceptance approach to security management. It argues that the failure of organisations to systematise and clearly articulate acceptance as a distinct security management approach and a lack of organisational policies and procedures concerning acceptance hinder its efficacy as a security management approach. The paper identifies key and cross‐cutting components of acceptance that are critical to its effective implementation in order to advance a comprehensive and systematic concept of acceptance. The key components of acceptance illustrate how organisational and staff functions affect positively or negatively an organisation's acceptance, and include: an organisation's principles and mission, communications, negotiation, programming, relationships and networks, stakeholder and context analysis, staffing, and image. The paper contends that acceptance is linked not only to good programming, but also to overall organisational management and structures.  相似文献   
390.
The work reported compared the predictive ability of two theories of aesthetic behaviour, using normal, everyday objects. This involved utilizing simulated items of furniture in three experiments in which predictions deduced from the ‘collative-motivation’ model and what has been termed a ‘preference-for-prototypes’ model were made to compete empirically. For each of the five pairs of discrepant expectations formulated in the three experiments the outcomes were inconsistent with Berlyne's model, while supporting the prototypicality model. A number of theoretical implications are drawn from these findings.  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