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   1274篇
  免费   134篇
  国内免费   30篇
安全科学   196篇
废物处理   10篇
环保管理   421篇
综合类   259篇
基础理论   193篇
环境理论   13篇
污染及防治   24篇
评价与监测   25篇
社会与环境   173篇
灾害及防治   124篇
  2024年   2篇
  2023年   23篇
  2022年   34篇
  2021年   43篇
  2020年   53篇
  2019年   75篇
  2018年   66篇
  2017年   84篇
  2016年   76篇
  2015年   52篇
  2014年   54篇
  2013年   145篇
  2012年   76篇
  2011年   82篇
  2010年   58篇
  2009年   58篇
  2008年   43篇
  2007年   48篇
  2006年   57篇
  2005年   44篇
  2004年   28篇
  2003年   35篇
  2002年   28篇
  2001年   22篇
  2000年   22篇
  1999年   24篇
  1998年   14篇
  1997年   8篇
  1996年   4篇
  1995年   13篇
  1994年   3篇
  1993年   6篇
  1992年   4篇
  1991年   7篇
  1990年   2篇
  1989年   4篇
  1988年   3篇
  1983年   2篇
  1982年   2篇
  1981年   2篇
  1980年   3篇
  1979年   2篇
  1978年   2篇
  1977年   2篇
  1976年   1篇
  1974年   5篇
  1973年   5篇
  1972年   1篇
  1971年   6篇
  1970年   2篇
排序方式: 共有1438条查询结果,搜索用时 15 毫秒
991.
本文从铁路行业的特点出发,探讨和分析了我国安全生产管理体制中的群众监督的现状,研究了安全文化在安全生产群众监督(筒称安全监督)中的作用及其显著效果,指出了在铁路行业推行安全文化的深远意义和作用。  相似文献   
992.
ABSTRACT. Evidence from 1969 studies in Virginia and Ohio suggests that neither community leaders nor the general public are likely to define water related problems as major problem areas. An examination of the components of a social problem tends to indicate that water problems have not moved beyond a level of minimal public concern. When respondents were willing to describe existing or potential water problems, perceptions as well as possible solutions were described in abstract rather than action-oriented terms. It is suggested that efforts to eliminate water resource problems are not likely to be effective until public concern moves to motivational and behavioral levels.  相似文献   
993.
Based on the definition of migrant workers and migrant workers'social security,systems,policies and regulations and status quo of specific safeguard project of social security have been analyzed.Authors draw following conclusions: China's social security systems of migrant workers show diversification and differentiation trend; national-level policies take on diversification and local-level regulations take on differentiation; social welfare and social assistance have deficiency; coverage rate of social insurance items is extremely low.  相似文献   
994.
能源系统是从能源开采、能源生产到能源运输,再到终端消费或储备全过程的系统工程.能源在区域之间的运输促进了世界能源网络的形成,随着时间推移和各种外部因素的变化,能源空间格局也随着发生剧烈的变化.基于1990-2015年195个国家能源生产消费数据和贸易矩阵,采用双因子趋势图法和社会网络分析法分析世界能源生产、消费与运输的时空演变特征.结果表明:①世界能源的生产主要分布在中东、亚太、前苏联、北美、中南美和西北非,原油、天然气和煤炭的空间格局也存在差异.②世界能源消费增长存在波动,高消费量高增长率的区域分布在亚太和新兴经济体,欧洲能源消费放缓,北美、日本、俄罗斯消费出现负增长趋势.③从世界能源运输来看,能源出口集中在前苏联、中东、西北非和中南美地区,能源进口集中在亚太及欧美地区;世界能源运输整体流动性增强,中东和北非局部时期存在波动;能源生产国外向中心性不断攀升,亚太和新兴经济体内向中心性增长最快;形成“核心-次核心-节点”的层级结构,欧洲地位下降,亚太作用增强,多元化趋势显现;能源运输存在8条主要路径.④经济增长、政治局势、国家关系以及能源开发技术都对世界能源时空格局产生重大影响,各国也纷纷通过能源来源多样化、双多边合作、能源战略储备、新能源开发保证自身能源安全.随着页岩油气开发技术、新能源技术的发展普及,尤其是煤炭消费在世界范围的放缓锐减,未来世界能源空间格局也即将发生重大调整.  相似文献   
995.
社会资本对中国环境治理绩效影响的实证分析   总被引:1,自引:0,他引:1  
市场交易和政府命令一直被作为环境治理的两种有效方式,而交易成本的高昂和市场失灵的客观存在促使人们寻找除这两种方式外的其他方式.社会资本作为一个对于促进经济增长、管理自然资源与保护环境的关键变量得到学者的广泛关注.本文在对社会资本的概念、维度的梳理基础上,通过结构方程模型的实证研究,分析社会资本、社会分歧和社会能力在环境治理中的机理与影响,以期对我国开展社会资本与环境治理机制研究提供政策支持和理论借鉴.结果表明:组织层面的社会资本和社会能力与环境治理绩效呈显著的正相关,社会分歧与环境治理绩效呈显著的负相关,而个体层面的社会资本并未对环境治理绩效产生较大影响.通过交互效应分析得到社会分歧和社会能力在社会资本对环境绩效的影响过程中起到调节作用.即随着社会分歧的扩大(缩小),社会资本对环境治理绩效的影响将减弱(增强);随着社会能力的增强(减弱),社会资本对环境治理绩效的影响将增强(减弱).  相似文献   
996.
This paper examines some of the social processes associated with disaster conditions. Utilising an asset‐based perspective of community capacity, it focuses on four types of normative systems to interpret the ability of communities to manage disasters through market‐, bureaucratic‐, associative‐, and communal‐based norms. Drawing on experience of a wildfire in the Crowsnest Pass region of southwest Alberta, Canada, in 2003, the tensions and compatibilities among these normative systems are evaluated through interviews with 30 community leaders. The results confirm the contributions of all types of social capital to resiliency, the necessity for rapid use of place‐based knowledge, and the importance of communication among all types and levels of agents. In addition, they point to the value of identifying and managing potential conflicts among the normative systems as a means to maximising their contributions. The integration of local networks and groups into the more general disaster response minimised the impacts on health and property.  相似文献   
997.
998.
The ecosystem services concept is used to make explicit the diverse benefits ecosystems provide to people, with the goal of improving assessment and, ultimately, decision-making. Alongside material benefits such as natural resources (e.g., clean water, timber), this concept includes—through the ‘cultural’ category of ecosystem services—diverse non-material benefits that people obtain through interactions with ecosystems (e.g., spiritual inspiration, cultural identity, recreation). Despite the longstanding focus of ecosystem services research on measurement, most cultural ecosystem services have defined measurement and inclusion alongside other more ‘material’ services. This gap in measurement of cultural ecosystem services is a product of several perceived problems, some of which are not real problems and some of which can be mitigated or even solved without undue difficulty. Because of the fractured nature of the literature, these problems continue to plague the discussion of cultural services. In this paper we discuss several such problems, which although they have been addressed singly, have not been brought together in a single discussion. There is a need for a single, accessible treatment of the importance and feasibility of integrating cultural ecosystem services alongside others.  相似文献   
999.
Although organizational identification is founded on social identity and symbolic interactionist theories, current theories emphasize a social identity whereby organizational members categorize themselves and others based on roles and membership in an organization or work unit. In contrast symbolic interactionism, which resides in interpersonal relationships, is rarely theorized or empirically assessed in studies of organizational identification. We use survey data collected at an academic institution to explore how the strength and structure of an individual's social network both directly influences organizational identification as well as moderates the relation between social identity, or categorical, antecedents and organizational identification. Our results show that the size of an individual's network as well as the interaction between relationship strength and prestige better explain organizational identification than do antecedents based solely on categorization and social comparison processes. Thus networks of relationships, which have been a foundational but much neglected premise and process for organizational identification, are brought back into a theory of organizational identification. Copyright © 2010 John Wiley & Sons, Ltd.  相似文献   
1000.
Extensive forms of resource use are rarely subject to detailed environmental and social assessment. This paper outlines a potential methodology for assessment of the social impacts of extensive resource use activities based on the Pressure-State-Impact-Response (PSIR) model of integrated indicator development. It then tests this methodology through a case study of changed water flow regimes in Central Queensland's Fitzroy River catchment. While resource degradation associated with interruptions to flow was expected to force all resource users to face higher costs and greater uncertainty, negative social impacts were particularly concentrated among vulnerable groups and downstream industries. Extension of the PSIR framework and methodology proved useful in linking social and biophysical research and would thus appear to offer some potential as a model for incorporating social concerns within natural resource decision making.  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