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   1061篇
  免费   35篇
  国内免费   49篇
安全科学   227篇
废物处理   6篇
环保管理   272篇
综合类   334篇
基础理论   111篇
污染及防治   51篇
评价与监测   69篇
社会与环境   44篇
灾害及防治   31篇
  2024年   2篇
  2023年   17篇
  2022年   21篇
  2021年   35篇
  2020年   22篇
  2019年   16篇
  2018年   20篇
  2017年   21篇
  2016年   28篇
  2015年   27篇
  2014年   30篇
  2013年   63篇
  2012年   42篇
  2011年   80篇
  2010年   44篇
  2009年   69篇
  2008年   56篇
  2007年   66篇
  2006年   77篇
  2005年   77篇
  2004年   47篇
  2003年   42篇
  2002年   47篇
  2001年   40篇
  2000年   26篇
  1999年   29篇
  1998年   22篇
  1997年   12篇
  1996年   8篇
  1995年   8篇
  1994年   7篇
  1993年   9篇
  1992年   9篇
  1991年   5篇
  1990年   1篇
  1989年   2篇
  1987年   1篇
  1986年   1篇
  1985年   3篇
  1984年   1篇
  1983年   2篇
  1982年   2篇
  1981年   1篇
  1980年   2篇
  1979年   2篇
  1977年   2篇
  1969年   1篇
排序方式: 共有1145条查询结果,搜索用时 484 毫秒
71.
地下水污染健康风险评价理论体系研究   总被引:2,自引:0,他引:2  
基于对风险的认识,以地下水为研究载体提出地下水污染健康风险评价的概念.按照风险识别、风险量化、风险管理的步骤构建了地下水污染健康风险评价的理论体系,并对每个步骤进行了详细的描述和研究方法的探讨,提出了判定的原则和方法以及对我国地下水污染健康风险管理的建议,以期为我国地下水资源管理和保护工作提供科学依据.  相似文献   
72.
对GB/T28000《职业健康安全管理体系》系列国家标准的术语和定义进行了对比分析。  相似文献   
73.
分析了杭州市环保宣教工作的现状、面临的挑战,提出了新形势下环境宣教工作的对策建议。  相似文献   
74.
灾害风险认知能力是进行减灾教育的基础,受众获取灾害知识与信息的方式是影响减灾教育方法的重要因素,而受众获取灾害知识与信息的途径则会直接影响灾害内容的传递效率和效果。本文针对以上所关心的问题,为了建立合理有效的大学生减灾教育计划,应对大学生防灾减灾意识和能力不足的现状,通过问卷调查,分析和研究了来自不同生源地大学生的灾害风险认知水平、获取灾害知识和信息的方式与途径。从自然灾害风险认知的视角,通过寻找不同特性大学生群体获取减灾知识与信息的差异和趋同性,提出了现势条件下针对大学生的减灾教育对策。  相似文献   
75.
PROBLEM: The purpose of this study was to examine the relationship between overall risk of injury and time use patterns between work and active recreation among adolescents and young adults. METHODS: Using a representative sample of 9,795 Canadians aged 15-24 years, a multivariate logistic regression on the likelihood of any medically attended injury was conducted, including sociodemographic, individual, and time factors. RESULTS: Young people who engaged in a combination of high work and high activity hours were twice as likely to sustain a medically attended injury compared to those who worked low hours, but did not participate in any recreational activity. Those respondents who were not in school had a 43% increase in injury risk compared to full-time students. SUMMARY: Our findings suggest that injury risk was not a simple function of fatigue and cumulative exposure time. Our findings suggest the importance of considering time use and the associated injury risk tradeoffs. IMPACT ON INDUSTRY: Relevant to state and federal work safety policy makers, our findings suggest the importance of understanding where youth might otherwise spend their time if constraint were placed on their employment opportunities, and the associated injury risk tradeoffs must be taken into consideration.  相似文献   
76.
PROBLEM: A stated objective of driver education in North America is to produce safer drivers, typically defined as drivers less likely to crash. This paper examines the extent to which driver education has achieved this objective independently as well as the extent to which such programs can support the success of graduated licensing in reducing young driver crashes. In so doing, it discusses past experiences, recent developments, and the future direction of driver education and training in relation to graduated driver licensing. METHOD: Literature review and synthesis. RESULTS: Driver education programs have yet to demonstrate consistent attainment of their safety objectives. Moreover, they have not been found to enhance the safety effectiveness of graduated licensing programs--indeed, some practices, for example, "time discounts" for driver education have actually had a detrimental effect on teen safety. DISCUSSION: Despite its disappointing safety record to date, it is important not to abandon driver education. In particular, there are opportunities to improve driver education so that it achieves its safety objectives, and ensure that programs in the future complement graduated driver licensing and contribute to its overall safety benefits. Current and future efforts to improve driver education and better integrate it with graduated licensing programs, however, need to be rigorously evaluated to determine what does and does not work to reduce young driver crashes, and as importantly, to understand why this is the case. IMPACT ON INDUSTRY: Improved driver education integrated with graduated driver licensing has potential safety benefits.  相似文献   
77.
欧盟高等教育有着悠久的历史,在环境科学领域处于世界领先水平。随着欧盟一体化进程的深入推进,中国工业化和城市化步伐的加快,环境科学领域面临着新的机遇和挑战,必将给中欧之间的科技教育合作创造更多的机会。面对新形势,有必要认真分析中欧在环境科学领域科技教育合作的现状与机遇,总结经验,找出问题,提出对策,进而促进中欧合作的健康发展。  相似文献   
78.
In an extensive environmental study, field samples, including soil, water, rice, vegetable, fish, human hair and urine, were collected at an abandoned tungsten mine in Shantou City, southern China. Results showed that arsenic (As) concentration in agricultural soils ranged from 3.5 to 935 mg kg−1 with the mean value of 129 mg kg−1. In addition, As concentration reached up to 325 μg L−1 in the groundwater, and the maximum As concentration in local food were 1.09, 2.38 and 0.60 mg kg−1 for brown rice, vegetable and fish samples, respectively, suggesting the local water resource and food have been severely contaminated with As. Health impact monitoring data revealed that As concentrations in hair and urine samples were up to 2.92 mg kg−1 and 164 μg L−1, respectively, indicating a potential health risk among the local residents. Effective measurements should be implemented to protect the local community from the As contamination in the environment.  相似文献   
79.
对杭州市环保系统的人才总量、学历结构、专业结构、职称结构和年龄结构等方面作了较详细的分析;针对杭州市环保系统存在的人才总量不足、结构分布不合理和高层次人才匮乏等问题,提出了引进高层次人才、加强教育培训、壮大基层队伍等对策。  相似文献   
80.
创新教育是培养人具有创新能力的教育。创新教育是社会发展的必然选择;创新教育是教育发展的必然选择;创新教育是人类的发展的必然选择。创新教育以创新精神的培养为基础,以创新思维的培养为核心,以创新能力的培养为最终目标。  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