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   1830篇
  免费   19篇
  国内免费   17篇
安全科学   43篇
废物处理   81篇
环保管理   153篇
综合类   235篇
基础理论   501篇
环境理论   1篇
污染及防治   569篇
评价与监测   156篇
社会与环境   123篇
灾害及防治   4篇
  2023年   17篇
  2022年   46篇
  2021年   56篇
  2020年   26篇
  2019年   27篇
  2018年   115篇
  2017年   84篇
  2016年   120篇
  2015年   84篇
  2014年   96篇
  2013年   122篇
  2012年   117篇
  2011年   147篇
  2010年   95篇
  2009年   83篇
  2008年   103篇
  2007年   99篇
  2006年   77篇
  2005年   61篇
  2004年   65篇
  2003年   38篇
  2002年   28篇
  2001年   23篇
  2000年   18篇
  1999年   15篇
  1998年   4篇
  1997年   6篇
  1996年   7篇
  1995年   6篇
  1994年   5篇
  1993年   8篇
  1992年   5篇
  1991年   5篇
  1990年   3篇
  1989年   3篇
  1988年   6篇
  1985年   3篇
  1984年   2篇
  1983年   2篇
  1981年   2篇
  1980年   4篇
  1977年   2篇
  1976年   2篇
  1966年   3篇
  1965年   2篇
  1964年   4篇
  1961年   3篇
  1960年   2篇
  1959年   2篇
  1954年   2篇
排序方式: 共有1866条查询结果,搜索用时 15 毫秒
11.
12.
13.
14.
15.
A group of routine data entry operators (female) was included in the Polish MEPS (musculoskeletal--eyestrain--psychosocial--stress) study. Before the intervention, ergonomic assessment revealed improper working conditions such as inadequate lighting, uncomfortable chairs, and lack of forearm and wrist support while medical examination revealed that trapezius muscle load along with upper arm, head and back angles were higher than advisable. Subjects complained about neck and shoulder pain, visual problems, and psychosocial conditions. The ergonomic intervention included installation of new luminaires and Venetian blinds, new chairs, repair of ventilators, and optometric corrections. The results after the intervention showed mainly improvement in chair comfort, lighting conditions, visual strain, and sitting posture. However, financial limitations did not allow satisfactory completion of the intervention leading to a mixed interpretation of the results.  相似文献   
16.
Three groups of data entry female visual display terminal (VDT) workers from Norway (n = 30), Poland (n = 33) and the USA (n = 29) were compared. Before intervention, the Norwegian group reported more neck pain compared with the Polish group. The Polish group reported less shoulder pain than both the U.S. and the Norwegian groups. The clinical examination documented fewer symptoms and signs of musculoskeletal illness among the Polish participants compared with the Norwegian and the U.S. groups. After intervention, the Norwegian group reported a reduction in neck pain while the U.S. group reported a reduction in shoulder pain. The Polish group reported an increase in neck, shoulder and forearm pain at follow-up compared to after intervention. The Polish group recorded higher flexion of the upper arm at follow-up parallel with an increase of pain in the upper part of the body. Visual discomfort showed variable results in the 3 countries.  相似文献   
17.
Recent research has focused on establishing the values of preserving biodiversity both in agriculture and in less managed ecosystems, and in showing the importance of the role of cultural diversity in preserving biodiversity in food production systems. A study of the philosophy embedded in cultural systems can reveal the importance of the technological information for preserving genetic biodiversity contained in such systems and can be used to support arguments for the protection/preservation of cultural diversity. For example, corn or maize can serve as a paradigm of Native American thinking and can provide one of the few areas from which common philosophical conceptions can emerge. An examination of the cultivation of corn or maize as an agricultural activity and as a cultural activity in Native American literature reveals a philosophy that recognizes the importance of biodiversity and provides techniques for its preservation. Corn, and the food and the materials derived from it, is something thought out, not by specialists, but by the entire tribe and its ancestors, even if this thinking is done within what we might consider a framework of highly mythical notions. Importantly, this framework yields an understanding of both the genetics and nutrition of corn. A survey of these mythical notions (myths and stories) and agricultural practices makes this thought explicit and exemplifies the value of cultural diversity and biodiversity.  相似文献   
18.
The fifth meeting of INRA’s national network of ecotoxicologists took place on 25 to 27 November 2014 in Biarritz, France. The main aim of the meeting was to bring together ecotoxicologists from INRA and associated partners, providing them ample opportunity to share and discuss their latest scientific results as well as the national policy of research in ecotoxicology and to precise perspectives for the network.  相似文献   
19.
20.
Environmental Science and Pollution Research - In this paper, we analyze the existence of the environmental Kuznets curve as reported by Kuznets (Am Econ Rev 5:1–28, 1955) by using the...  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