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   485篇
  免费   42篇
  国内免费   6篇
安全科学   66篇
废物处理   9篇
环保管理   203篇
综合类   161篇
基础理论   39篇
污染及防治   2篇
评价与监测   12篇
社会与环境   34篇
灾害及防治   7篇
  2024年   2篇
  2023年   3篇
  2022年   5篇
  2021年   6篇
  2020年   14篇
  2019年   13篇
  2018年   11篇
  2017年   14篇
  2016年   22篇
  2015年   8篇
  2014年   21篇
  2013年   29篇
  2012年   44篇
  2011年   30篇
  2010年   22篇
  2009年   25篇
  2008年   16篇
  2007年   46篇
  2006年   43篇
  2005年   38篇
  2004年   29篇
  2003年   19篇
  2002年   11篇
  2001年   20篇
  2000年   19篇
  1999年   2篇
  1998年   7篇
  1997年   3篇
  1996年   2篇
  1995年   4篇
  1994年   1篇
  1993年   3篇
  1980年   1篇
排序方式: 共有533条查询结果,搜索用时 15 毫秒
81.
ABSTRACT

Continuously reducing the CO2 intensity of GDP is the core strategy for developing countries to realize the dual targets of economic growth and CO2 emissions reduction. The measures are twofold: one is to strengthen energy saving and decrease energy intensity of GDP and the other is to promote energy structural decarbonization and reduce CO2 intensity of energy consumption. In order to control global temperature rise no more than 2°C, the decrease in CO2 intensity of GDP needs surpass 4% before 2030, but it could be merely about 2% based on the current trend. Therefore, all countries ought to speed up the low-carbon transition in energy and economy. As for China, keeping a continuous decline in CO2 intensity of GDP of 4%–5% will ensure the realization of the NDC objectives, and also promotes the early peaking of CO2 emissions before 2030. China will play a positive leading role in realizing a win-win low-carbon development coordinating sustainable development and climate change mitigation.  相似文献   
82.
In the current stage of Chinese forest ownership reform, the central and local governments as well as the forest farmers play different roles with variations in their expected returns. Managing these respective relationships between the forestry stakeholders to maximize their benefits while actively engaging each stakeholder in the collective forest ownership reform process has become an important issue. This study uses the game theory methodology to analyze the relationship between the different reform stakeholders and then builds on the forest farmers’ participation in the reform model process at the reform movement micro-level. This model calculates the forest products equilibrium marketing sales and the government subsidies provided to the forest farmers, when the forest farmers willingly participate in the reform process. It will provide a reliable basis for formulation of government policies which positively impacts Chinese forestry reform.  相似文献   
83.
本文对火灾与爆炸灾害控制课程理论教学内容与手段、实验教学内容、课外实践环节、毕业(设计)论文环节、教学团队建设等方面进行了探讨。以培养卓越一线工程师的基本目标为指导,通过本课程的建设与教学,使学生具备扎实的理论功底。通过完善和增加实验项目,课外科技创新活动和毕业论文(设计)环节,培养学生的实践与创新能力。课程建设过程也是教学团队建设和科研团队建设过程,课堂教学内容的更新督促教师不断阅读最新的研究文献,丰富和更新自己的专业知识;引导成绩优异的本科生,在他们力所能及的范围内参与到教师的科研项目中,双方都受益匪浅。  相似文献   
84.
实验教学在高校环境专业教学工作中发挥着越来越重要的作用。通过对高校环境专业实验教学的现状和所存在的问题进行分析,提出了优化实验教学内容、改进实验教学方法和考核方式等改进措施,以提高高校环境专业实验教学水平。  相似文献   
85.
主要从4个方面对提高高等职业教育教师教学质量的途径和方法进行探讨:一是认真学习高等职业教育的文件政策,熟悉高等职业教育的教学规律;二是与时俱进,树立先进的高职教育理念;三是实事求是,忠于职守,坚持认真负责的教学态度;四是勇于创新,钻研教学艺术,形成高职教育的教学风格。  相似文献   
86.
课证融合模式下实训教学改革研究   总被引:3,自引:0,他引:3  
课证融合模式就是将课程与职业资格证书相结合的教学模式,是对职业教学改革的探索。但当前存在的实训教学标准模糊、校企合作实训教学条件不足、教师队伍转型滞后、教材开发混乱等现象严重阻碍了课证融合模式的推行,职业院校应当从明确考核评价标准、改进培养方案、加大双师教师的引进和培养、科学开发实训教材等途径进行尝试,推进课证融合。  相似文献   
87.
A survey was conducted in the United Statesin 1998 and 1999 to determine what members of theNational Association of State Universities and LandGrant Colleges (NASULGC) and of the AmericanAssociation of State Colleges and Universities (AASCU)offered agricultural ethics as an undergraduatecourse. Of the 59 responses, the survey found 15 USuniversities that have a course on agricultural ethicsor one that includes the topic. This paper willdiscuss the survey's findings and offer six reasonsthat explain why so few universities includeagricultural ethics in their curriculum. The sixreasons are: 1) lack of education in ethics andphilosophy on the part of agricultural scientists; 2)lack of institutional or disciplinary incentives foragricultural scientists to reflect on their work andits effects; 3) lack of administrative leadership incolleges of agriculture due to their failure tounderstand the benefits of agricultural ethics; 4)continuance of the prevailing assumption thatagriculture is inherently ethically correct; 5) thefelt necessity by agricultural scientists to defendthemselves against what are perceived to be unjust andinaccurate criticisms of agriculture; and 6) areluctance to engage in ethical reflection because itmay raise more problems than it solves. The paper'scentral question is why ethics is not taught in morecolleges of agriculture. Those who teach know thattheir students are tomorrow's farmers, businesspeople, professors, and policy makers. If we who nowteach and administer fail to include true ethicalstudy in our student's education, our students willstill be defensive when confronted with an ethicalissue and unable to respond except with assertionsbased on the production paradigm, the correctness ofwhich, although unexamined, we taught them. If theagricultural faculty does not recognize theopportunity and the obligation to participate in theshaping of values, then the values of agriculture willbe shaped elsewhere in the institution and insociety.  相似文献   
88.
叙述了电梯改造的概念,意义及与大修、更新的区别,并就各种电梯改造方法提出了应该注意的安全问题.  相似文献   
89.
ERP计算机课程往往可有效利用多媒体技术进行教学.ERP管理专业计算机课程在多媒体教学中如何应用显得尤为重要.通过采用多种教学形式、充分应用多媒体教学、灵活运用多媒体课件来促进ERP管理专业的计算机课程在多媒体教学的发展.  相似文献   
90.
本文主要论述了在设计色彩教学中,针对基础薄弱或毫无美术基础的平面设计类专业学生,而设计的一套由简到繁、由浅入深、由分到合、由易到难、循序渐进的教学方式,该套方式运用丰富多样的、富有创造性的教学方法实施教学,可以帮助学生系统地完成从理论学习到实践练习、再转入实际创作的一个科学的学习过程,而且能激发学生的设计热情、开拓学生的设计思路。  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