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   1132篇
  免费   28篇
  国内免费   9篇
安全科学   46篇
环保管理   565篇
综合类   287篇
基础理论   79篇
污染及防治   3篇
评价与监测   5篇
社会与环境   171篇
灾害及防治   13篇
  2024年   1篇
  2023年   5篇
  2022年   30篇
  2021年   56篇
  2020年   30篇
  2019年   22篇
  2018年   18篇
  2017年   22篇
  2016年   34篇
  2015年   20篇
  2014年   44篇
  2013年   59篇
  2012年   106篇
  2011年   96篇
  2010年   69篇
  2009年   54篇
  2008年   49篇
  2007年   111篇
  2006年   68篇
  2005年   51篇
  2004年   60篇
  2003年   57篇
  2002年   22篇
  2001年   10篇
  2000年   26篇
  1999年   20篇
  1998年   8篇
  1997年   4篇
  1996年   6篇
  1995年   2篇
  1993年   3篇
  1991年   1篇
  1990年   2篇
  1989年   2篇
  1971年   1篇
排序方式: 共有1169条查询结果,搜索用时 31 毫秒
301.
乡村振兴战略和乡村产业转型发展背景下,休闲旅游产业在乡村地域的兴起扰动了当前就业人口由乡村向城镇流动的宏观趋势,乡村旅游就业吸附正从微观上改变着城乡间劳动力空间流动的格局和过程。为科学理解乡村旅游就业吸附引起城乡劳动力空间流动发生变化的特征与机制,文章基于在浙晋山岳景区依托型乡村旅游地深度访谈的一手数据,分析了乡村旅游就业人口流动的空间分布特征、就业吸附的空间模式和过程机制。结果表明:①山岳景区依托型乡村旅游就业吸附呈现距离衰减和空间层级结构的特征,0~4 km为核心层、4~12 km为过渡层、12 km以上为外缘层;但在不同社会经济发展环境下该特征存在区域差异,欠发达地区乡村旅游就业吸附的空间集中性,比发达地区更加明显。②研究从城乡地域空间系统的视角,基于人口转移“推—拉”理论对乡村旅游就业人口空间流动特征和影响机制进行分析,发现山岳景区依托型乡村旅游就业吸附呈现以城镇、乡村为就业吸附极,以城乡接合部为吸附效用“分水岭”的空间模式;其中,连接城乡间的便捷交通是乡村旅游就业吸附实现的关键介质。③基于乡村旅游就业吸附空间适用性,文章针对性提出了“空间围栏效应”的概念。文章不仅从微观尺度上丰富了乡村旅游就业人口空间流动特征、过程、模式等的理论认识,而且对切实指导乡村地域在乡村旅游开发实践中理性理解乡村旅游的就业促进作用,提升乡村旅游开发规划和投资的效率具有积极意义。  相似文献   
302.
宜宾饮食文化资源的旅游开发研究   总被引:2,自引:0,他引:2  
饮食文化对旅游业发展有着不可忽视的促进功能,饮食文化旅游资源的开发已越来越被旅游业所重视。宜宾饮食文化源远流长,具有浓郁的地方特色,但对宜宾饮食文化资源的旅游开发尚处于起步阶段。在分析宜宾饮食文化资源旅游开发现状的基础上,就如何把宜宾饮食文化资源的开发与旅游业的发展相结合,做大做强宜宾旅游美食文化产业提出了一些开发对策和建议。  相似文献   
303.
交际法教学是英语教学中一个重要教学理论分支,在指导高职旅游英语教学方面起着积极重要的作用。笔者利用调查、总结归纳等研究方法,分析交际法教学的特点及作用,旨在进一步深化与探索交际法教学在高职旅游英语实际教学中的应用形式,拓展外延,并重点阐述了交际法教学在实际教学应用中的具体方法。  相似文献   
304.
良好的生态环境是人类生存和发展的基础,是经济社会发展的物质条件。保护和管理好自然生态环境,是实施可持续发展的关键,也是实现跨世纪绿色工程的重要战略。本文通过对秦皇岛生态环境保护与旅游开发的调查与思考得出结论:将秦皇岛建设成以旅游为龙头的生态城市是秦皇岛市建设和发展的方向。  相似文献   
305.
旅游发展价值取向与制度变革:美国国家公园体系的启示   总被引:4,自引:0,他引:4  
通过对旅游发展的价值取向与管理体制分析发现,美国国家公园体系让国民享受到保护较好的遗产资源和舒适生态的游憩环境,国家公园提供的国民精神教育与实在的公益性服务提高了国民的凝聚力。相比而言,我国国家级保护区体系缺乏统一协调的发展理念、管理部门职能交叉、法律基础薄弱、管理及维护经费无稳定保障、公共服务意识缺失。因而,我国必须改变保护区内以经济利益为核心的旅游发展价值取向,建议对现有制度作如下调整:严格规范准入机制,重新梳理国家级保护区名录;完善现有立法,切实保护各类具有国家意义的遗产资源;逐步推进大部门体制改革,形成统一化管理的国家级保护区体系;启动淘汰机制限制保护区的数量扩张,将中央财政集中到确需保护的保护地;推出原住民资助计划,推进文化保护与社会公平;提高保护区体系从业人员素质,为各保护区建立具有科学性和教育性的解说系统,发挥国家级保护区体系对国民精神教育的重大作用.  相似文献   
306.
The article establishes the appraisal index system for entire urban agglomeration and its interior cities individually, concretely including five aspects: driving forces for tourism development, the level of tourism development, tourism impacts, tourism economic connection and tourism contributions of different cities to the whole urban agglomeration. As tourism competitiveness has the characteristics of comprehensiveness, systematicness and dynamicness, the article attempts to apply the structural prediction means of system dynamics to evaluating tourism competitiveness, aiming to provide some research methods and analysis ideas for tourism competitiveness measurement and trends analysis in urban agglomeration. Taking Shandong Peninsula urban agglomeration as the study area, the article simulates and analyzes the tourism competitiveness trend of the whole region and its interior cities from 2005 to 2020, and the result reflects that integrated development and regional combination of tourism are important means to upgrade tourism competitiveness in this region.  相似文献   
307.
Outdoor recreation and nature-based tourism represent an increasingly intensive form of land use that has considerable impacts on native ecosystems. The aim of this paper is to investigate how revegetation and management of ski runs influence soil nutrients, vegetation characteristics, and the possible invasion of nonnative plant species used in revegetation into native ecosystems. A soil and vegetation survey at ski runs and nearby forests, and a factorial experiment simulating ski run construction and management (factors: soil removal, fertilization, and seed sowing) were conducted at Ruka ski resort, in northern Finland, during 2003–2008. According to the survey, management practices had caused considerable changes in the vegetation structure and increased soil nutrient concentrations, pH, and conductivity on the ski runs relative to nearby forests. Seed mixture species sown during the revegetation of ski runs had not spread to adjacent forests. The experimental study showed that the germination of seed mixture species was favored by treatments simulating the management of ski runs, but none of them could eventually establish in the study forest. As nutrient leaching causes both environmental deterioration and changes in vegetation structure, it may eventually pose a greater environmental risk than the spread of seed mixture species alone. Machine grading and fertilization, which have the most drastic effects on soils and vegetation, should, therefore, be minimized when constructing and managing ski runs.  相似文献   
308.
It has been argued that strategies to manage natural areas important for tourism and recreation should integrate an understanding of tourist preferences for specific natural features. However, the accuracy of tourist recalled perceptions of environmental attributes, which are usually derived from post hoc surveys and used to establish management priorities, is currently unmeasured. We tested the validity of the relationship between tourist-stated preferences and actual condition of coral reefs around the Caribbean island of Bonaire. Using standardized questionnaires, we asked 200 divers to select their most and least favorite dive sites and the attributes that contributed to that selection. We also carried out ecological surveys at 76 of the 81 dives sites around the island to assess the actual conditions of the attributes indicated as important for site selection. Fish- and coral-related attributes were key features affecting dive enjoyment. In general, divers appeared to be able to perceive differences between sites in the true condition of biological attributes such as fish species richness, total number of fish schools, live coral cover, coral species richness, and reef structural complexity, although men and women divers differed in their ability to perceive/recall some of the attributes. Perceived differences in environmental attributes, such as surface conditions, underwater current, and the likelihood of encountering rare fish and sea turtles, were not empirically validated. The fact that divers perceive correctly differences in the condition of some of the key biological attributes that affect dive enjoyment reinforces the need to maintain overall reef condition at satisfactory levels. However, variation in accuracy of perceptions owing to demographic factors and attribute type suggests the need for caution when using public perceptions to develop environmental management strategies, particularly for coral reefs.  相似文献   
309.
Group-based approaches to the elicitation of stated preferences are considered particularly suitable for valuing unfamiliar or complex environmental goods. While such exercises provide participants with detailed information and time to think and deliberate, they require a considerable degree of motivation from the respondents. Effects of motivation on willingness to pay (WTP) tend to be ignored within the valuation research community, although similar effects have been reported in psychological literature. In this study, a novel approach using video recordings and behaviour coding of participants in group-based Market Stall meetings was employed to measure motivation as well as its impact on WTP and the theoretical and convergent validity of stated WTP. Indicators of motivation correlated significantly with both WTP statements and their validity, with more motivated individuals stating higher and more valid bids. These findings suggest that the recognition of motivation is an important novel element of research into stated preferences, particularly with respect to usefulness and quality of WTP measures.  相似文献   
310.
城市化发展的动力带动 ,城市旅游资源的富集 ,人口、经济的集聚与扩散 ,旅游供需关系的结合 ,旅游者对城市旅游目的地的选择行为 ,政策的导向 ,旅游业的发展和交通设施的完善等因素 ,导致了旅游城市化现象的产生。以长江三角洲都市连绵区为例 ,分析了旅游城市化进程中还存在发展思路不明 ,破坏旅游景观和生态环境 ,旅游规划与城市规划、城市发展不相适应 ,人口管理比较混乱 ,用地功能分区不明显 ,土地资源浪费严重等问题。提出了旅游城市化的发展对策  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