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   676篇
  免费   31篇
  国内免费   2篇
安全科学   137篇
废物处理   6篇
环保管理   179篇
综合类   174篇
基础理论   76篇
环境理论   2篇
污染及防治   16篇
评价与监测   50篇
社会与环境   37篇
灾害及防治   32篇
  2025年   1篇
  2024年   8篇
  2023年   15篇
  2022年   14篇
  2021年   18篇
  2020年   29篇
  2019年   35篇
  2018年   34篇
  2017年   23篇
  2016年   23篇
  2015年   26篇
  2014年   35篇
  2013年   51篇
  2012年   36篇
  2011年   52篇
  2010年   32篇
  2009年   27篇
  2008年   25篇
  2007年   37篇
  2006年   36篇
  2005年   24篇
  2004年   17篇
  2003年   18篇
  2002年   10篇
  2001年   13篇
  2000年   9篇
  1999年   5篇
  1998年   9篇
  1997年   12篇
  1996年   4篇
  1995年   4篇
  1994年   1篇
  1993年   5篇
  1992年   2篇
  1991年   3篇
  1990年   2篇
  1989年   1篇
  1988年   2篇
  1987年   1篇
  1986年   2篇
  1985年   1篇
  1984年   3篇
  1983年   1篇
  1981年   1篇
  1980年   1篇
  1974年   1篇
排序方式: 共有709条查询结果,搜索用时 0 毫秒
631.
    
The National Occupational Exposure Survey (NOES) was used to determine probabilities for 4 potential physical-agent and 10 potential ergonomic-related exposure hazards among a representative sample of U.S. industries. Potential physical-agent hazard exposures, principally whole-body and segmental vibration, were highest among railroad and heavy construction industries. Several construction industries had high probabilities of potential ergonomic-related exposure hazards, especially to the back and upper extremities.

Establishments with 100 to 249 employees had the highest probability of potential exposures to the 2 types of hazards. Measures of safety and health climate did not differ consistently between high-hazard and low-hazard establishments. The approach taken in this paper may be used to help identify highrisk industries, evaluate interventions, and develop inspection strategies.  相似文献   
632.
为确保水冷器的服役周期,针对大检修开工后水冷器内漏的问题,从设计寿命、使用检修以及定期检验等方面进行了讨论,在设计者根据工况特点合理确定水冷器设计寿命的基础上,使用单位和检验机构还应根据水冷器潜在失效模式有针对性地加强日常管理。建议水冷器的停工检修与定期检验应关注管束的使用寿命,以保证检修后水冷器能运行到下一检修周期。  相似文献   
633.
通过分析地铁火灾监控系统的结构组成和技术组成的发展情况,总结当前地铁火灾监控系统应用领域的各项技术,并以这些技术作为德尔菲调查问卷的内容,按照德尔菲调查的要求设计调查问卷,联络本领域资深专家进行德尔菲调查,统计专家的反馈信息,将反馈信息定量转化为计算值,计算各技术课题指标评价值,定量分析每个技术领域内技术课题影响地铁火灾监控系统发展的重要程度、各技术领域的专家认同重要程度以及技术课题预计实现时间;最终通过重要程度与专家认同重要程度计算出的综合认同重要程度,总结分析出信息处理领域、探测领域、报警和网络通信领域是制约地铁火灾监控系统发展最主要的因素,提出各技术领域的技术大部分都预计在2010-2020年之间实现,其中实现最快的是探测领域内的技术课题。  相似文献   
634.
为深入了解安全生产标准的实施情况,运用情景分析法和专家分析法,根据标准获取情况、宣贯情况、标准适用性3个方面设计了调查问卷,首次对工矿商贸企业开展调查。研究结果表明:当前安全生产标准工作中存在着标准获取困难、宣贯不到位、部分标准适用性不强等问题。在分析原因的基础上,提出建立安全生产标准信息共享与咨询服务工作平台,建立标准宣贯长效工作机制,优化工作程序、提高标准质量等方面的建议,为加强安全生产标准工作提供参考。  相似文献   
635.
根据2007年开始的第一次全国污染源普查、2009年和2010年进行的污染源普查数据动态更新调查填报、汇总、模板审核实际遇到的问题,对2007版第一次全国污染源普查工业污染源产排污系数手册及2010年修正版手册中的某些行业系数,在填报和审核中遇到的与实际产生偏差现象进行了分析,并提出了修改意见。  相似文献   
636.
    
Objective: Driver sleepiness contributes substantially to road crash incidents. Simulator and on-road studies clearly reveal an impairing effect from sleepiness on driving ability. However, the degree to which drivers appreciate the dangerousness of driving while sleepy is somewhat unclear. This study sought to determine drivers' on-road experiences of sleepiness, their prior sleep habits, and personal awareness of the signs of sleepiness.

Methods: Participants were a random selection of 92 drivers traveling on a major highway in the state of Queensland, Australia, who were stopped by police as part of routine drink driving operations. Participants completed a brief questionnaire that included demographic information, sleepy driving experiences (signs of sleepiness and on-road experiences of sleepiness), and prior sleep habits. A modified version of the Karolinska Sleepiness Scale (KSS) was used to assess subjective sleepiness in the 15 min prior to being stopped by police.

Results: Participants' ratings of subjective sleepiness were quite low, with 90% reporting being alert to extremely alert on the KSS. Participants were reasonably aware of the signs of sleepiness, with many signs of sleepiness associated with on-road experiences of sleepiness. Additionally, the number of hours spent driving was positively correlated with the drivers' level of sleep debt.

Conclusions: The results suggest that participants had moderate experiences of driving while sleepy and many were aware of the signs of sleepiness. The relationship between driving long distances and increased sleep debt is a concern for road safety. Increased education regarding the dangers of sleepy driving seems warranted.  相似文献   

637.
    
This study proposed four original concepts – green perceived value, green satisfaction, green trust, and green loyalty – and discussed their relationships. The results showed that enhancing green perceived value, green satisfaction, and green trust of customers can increase their green loyalty. Furthermore, this study demonstrated that green perceived value can not only directly influence green loyalty positively, but also indirectly influence it positively via green satisfaction and green trust. In addition, this study undertook a comparative analysis between the original model and the four competing models. The results indicated that it is imperative to separate green perceived value, green satisfaction, green trust, and green loyalty from perceived value, satisfaction, trust, and loyalty. In the environmental era, if companies intend to raise their customers' green loyalty, they need to invest resources to raise their customers' green perceived value, green satisfaction, and green trust, rather than perceived value, satisfaction, and trust. Copyright © 2010 John Wiley & Sons, Ltd and ERP Environment.  相似文献   
638.
    
The deleterious impact of industrial activities on safety health and environmental quality has motivated industries to adopt environmental management systems (EMSs). This paper examines the implementation of EMSs in industries that interact with the Atlantic coast of Cameroon, which has been plagued with effluents emanating from industrial activities. Through a questionnaire based survey that was conducted from January 2005 to June 2005 with all the industries along the Atlantic coast of Cameroon, this paper seeks to address the motivating factors, implementation hurdles and benefits accrued by these industries as a result of implementing EMSs. Although enormous benefits have been accrued as a result of EMS implementation, a plethora of hurdles still persist in the realm of EMS implementation in these industries. Against this background, this paper concludes by prescribing a number of recommendations that could be used to promote the implementation of EMSs in industries that interact with the Atlantic coast of Cameroon. Copyright © 2006 John Wiley & Sons, Ltd and ERP Environment.  相似文献   
639.
    
This paper aims to examine the impact of perceived corporate social responsibility (CSR), with a focus on ethical and environment questions related to the constructs of customer satisfaction (CS), relationship maintenance (RM) and customer loyalty (CL), on determining the attitudinal and behavioural loyalty and maintenance of customers in the shipping industry. For this purpose, this study enhances its empirical validity by collecting data from 214 respondents in South Korea and testing the hypothesis using structure equation modelling. It was found that (1) CSR is an effective relationship marketing tool that requires further research to investigate its benefits; (2) systemic investigation in CSR activities in the shipping industry finds publishing CSR reports the most preferred tool among major shipping companies; and (3) there is a strong empirical evidence which supports that values have a significant impact on the customers' perception of CSR performance. Copyright © 2014 John Wiley & Sons, Ltd and ERP Environment  相似文献   
640.
    
This article investigates the role of passenger perception on corporate social responsibility (CSR) in improving passenger satisfaction by examining the direct and mediating effects through service standards, customer facilities, corporate image, and corporate reputation in a cross-culture context. A questionnaire survey was carried out on airport user experiences from 528 passengers using China and Pakistan airports. Smart PLS-3.3 was used to test the formulated hypothesis. The results showed that CSR significantly affects passenger satisfaction. The results also revealed CSR initiatives have a significant effect on the service standard, customer facilities, corporate image, and corporate reputation. Customer facilities and corporate image were found to be significant mediators for CSR-satisfaction link. However, the service standard and corporate reputation showed an insignificant relationship.  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