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   300篇
  免费   47篇
  国内免费   13篇
安全科学   108篇
废物处理   2篇
环保管理   62篇
综合类   90篇
基础理论   49篇
环境理论   1篇
污染及防治   10篇
评价与监测   8篇
社会与环境   19篇
灾害及防治   11篇
  2024年   2篇
  2023年   6篇
  2022年   10篇
  2021年   14篇
  2020年   19篇
  2019年   19篇
  2018年   13篇
  2017年   16篇
  2016年   18篇
  2015年   15篇
  2014年   15篇
  2013年   22篇
  2012年   20篇
  2011年   22篇
  2010年   22篇
  2009年   16篇
  2008年   11篇
  2007年   16篇
  2006年   13篇
  2005年   18篇
  2004年   12篇
  2003年   4篇
  2002年   3篇
  2001年   2篇
  2000年   7篇
  1999年   5篇
  1997年   5篇
  1996年   3篇
  1995年   1篇
  1994年   2篇
  1993年   2篇
  1992年   1篇
  1991年   1篇
  1986年   1篇
  1985年   1篇
  1982年   1篇
  1981年   1篇
  1978年   1篇
排序方式: 共有360条查询结果,搜索用时 62 毫秒
101.
102.
Moshe Maor 《Disasters》2010,34(4):955-972
This study evaluates the effectiveness of the Municipal Emergency Consultation project in eight Israeli local authorities. The initiative centres on the appointment of independent emergency preparedness consultants entrusted with tailoring an emergency preparedness package to suit the specific needs of each locality. Regarding emergency preparedness improvements, in all of the municipalities examined, a concept of municipal emergency operation was consolidated and the derived emergency plan tested. Emergency work processes were structured and service‐level agreements reached between municipality departments. Where necessary, a‐linear patterns of municipal functioning in an emergency were established. Concerning a ‘spillover’ of emergency preparedness improvements into routine operations, and a ‘spillover’ of routine management improvements into local emergency preparedness, two municipalities near Gaza, which typically function in an emergency routine, saw a significant ‘spillover’ of emergency preparedness into routine functioning. In other localities, local managers chose to improve a number of municipal structures and procedures in times of routine functioning, which are also related to the functioning of the municipality during an emergency.  相似文献   
103.
本文针对电磁防护服装的性能要求,对电磁防护服装的特点及其防护性能的测试指标进行了分析。在此基础上,根据GB/T23463-2009标准和相关文献确定了服装屏蔽效能测试的试验方法和具体实验条件,并且搭建实验对不同面料的两件无袖电磁防护女上衣进行了屏蔽效能的测试。并分析比较了服装与其所使用织物的电磁屏蔽效能值,说明织物屏蔽效能的测试数据不能代替服装的屏蔽效能。关于服装电磁防护性能的测试分析既满足了电磁防护服装的发展要求,也为进一步制定电磁防护服装的测试及相关标准提供了依据。  相似文献   
104.
复杂人机系统班组人误模型与量化分析   总被引:1,自引:1,他引:0  
讨论一个班组人员行为模型,即包括:任务模型、事件模型、班组模型和人-机交互模型4个模块,并用其模拟和分析事故状态下的运行班组对异常事故的响应过程;利用班组认知过程流程图模型表征事件发展过程中班组成员对事故的征兆识别、决策、计划和行动执行的响应过程;采用CREAM的量化分析技术,对核电站的蒸汽发生器管道破管事故的班组认知失误事件进行量化分析。  相似文献   
105.
职业安全培训效果定量评估方法应用研究   总被引:2,自引:1,他引:2  
成松柏  陈国华 《灾害学》2007,22(2):132-136
职业安全培训是企业安全管理的重要内容,是提高员工安全意识和事故风险管理技能的主要手段。但是职业安全培训效果如何,目前尚无有效的定量评估方法。针对安全培训这个复杂的多因素、多变量、多层次系统,通过对影响培训效果的各因素以及因素之间的相互联系进行系统深入的分析,建立起科学、全面和客观的评价指标体系;通过运用层次分析法(AHP)法,合理准确地确定各评价因素的权重,在此基础上运用模糊数学基本理论构建职业安全培训效果定量评估模型;并通过案例加以应用,表明该模型的评价结果能较好地反映实际情况,对于提高和改善培训质量,降低事故风险,具有重要的应用价值。  相似文献   
106.
气象和环境对装备的影响及适应性对策   总被引:4,自引:1,他引:3  
气象条件、环境条件对飞机空中飞行作战有着至关重要的影响。为了提高新时期我军的战斗力,就必须做好新型武器装备的防护,制定出切实有效的防护措施,有效发挥我军新型战机作战效能。  相似文献   
107.
Decisions need to be made about which biodiversity management actions are undertaken to mitigate threats and about where these actions are implemented. However, management actions can interact; that is, the cost, benefit, and feasibility of one action can change when another action is undertaken. There is little guidance on how to explicitly and efficiently prioritize management for multiple threats, including deciding where to act. Integrated management could focus on one management action to abate a dominant threat or on a strategy comprising multiple actions to abate multiple threats. Furthermore management could be undertaken at sites that are in close proximity to reduce costs. We used cost‐effectiveness analysis to prioritize investments in fire management, controlling invasive predators, and reducing grazing pressure in a bio‐diverse region of southeastern Queensland, Australia. We compared outcomes of 5 management approaches based on different assumptions about interactions and quantified how investment needed, benefits expected, and the locations prioritized for implementation differed when interactions were taken into account. Managing for interactions altered decisions about where to invest and in which actions to invest and had the potential to deliver increased investment efficiency. Differences in high priority locations and actions were greatest between the approaches when we made different assumptions about how management actions deliver benefits through threat abatement: either all threats must be managed to conserve species or only one management action may be required. Threatened species management that does not consider interactions between actions may result in misplaced investments or misguided expectations of the effort required to mitigate threats to species.  相似文献   
108.
Ex situ conservation strategies for threatened species often require long‐term commitment and financial investment to achieve management objectives. We present a framework that considers the decision to adopt ex situ management for a target species as the end point of several linked decisions. We used a decision tree to intuitively represent the logical sequence of decision making. The first decision is to identify the specific management actions most likely to achieve the fundamental objectives of the recovery plan, with or without the use of ex‐situ populations. Once this decision has been made, one decides whether to establish an ex situ population, accounting for the probability of success in the initial phase of the recovery plan, for example, the probability of successful breeding in captivity. Approaching these decisions in the reverse order (attempting to establish an ex situ population before its purpose is clearly defined) can lead to a poor allocation of resources, because it may restrict the range of available decisions in the second stage. We applied our decision framework to the recovery program for the threatened spotted tree frog (Litoria spenceri) of southeastern Australia. Across a range of possible management actions, only those including ex situ management were expected to provide >50% probability of the species’ persistence, but these actions cost more than use of in situ alternatives only. The expected benefits of ex situ actions were predicted to be offset by additional uncertainty and stochasticity associated with establishing and maintaining ex situ populations. Naïvely implementing ex situ conservation strategies can lead to inefficient management. Our framework may help managers explicitly evaluate objectives, management options, and the probability of success prior to establishing a captive colony of any given species.  相似文献   
109.
质量管理是提高实验室能力水平、竞争力的关键管理活动。质量管理水平的提升是以建立质量管理体系为基础,进而使之始终处于持续改进的螺旋上升状态,实现实验室规范、高效的质量管理。实验室内审工作是通过内部质量管理自我完善、自我改进、保持质量管理体系持续有效运行的一种重要手段。要确保内审工作的有效性,须对内审员的职业素质、内审策划、现场审核以及审后改进工作的完善落实等进行全过程的控制,并提出这些环节的控制措施,实现质量管理体系的持续改进。  相似文献   
110.
主要总结了零价铁与微生物耦合体系修复污染地下水的作用效能与机制,介绍了零价铁与微生物耦合体系中零价铁的和微生物的主要来源及特征,总结了该耦合技术对地下水中氯代烃、重金属以及硝酸盐的去除效能、作用机制以及产物,由于零价铁与微生物之间的协同作用,相较于单一体系,耦合体系对多种污染物的去除效率具有明显的优势,且耦合体系中污染物的去除产物更加无害化.此外,从材料本身与环境因子两个方面概述了零价铁与微生物耦合体系降解效率的影响因素,阐明了零价铁与微生物之间的交互作用机制.零价铁的毒性作用和刺激作用对微生物的生长与群落变化起到了重要作用,同时微生物的存在影响了零价铁的电子传递与钝化产物的构成.最后,提出了零价铁与微生物耦合体系的未来研究需求,总结了该技术的优势与不足,有利于该技术在地下水修复中的高效应用.  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