全文获取类型
收费全文 | 243篇 |
免费 | 22篇 |
国内免费 | 14篇 |
专业分类
测绘学 | 10篇 |
大气科学 | 17篇 |
地球物理 | 1篇 |
地质学 | 53篇 |
海洋学 | 24篇 |
综合类 | 12篇 |
自然地理 | 162篇 |
出版年
2022年 | 4篇 |
2021年 | 4篇 |
2020年 | 3篇 |
2019年 | 4篇 |
2018年 | 5篇 |
2017年 | 11篇 |
2016年 | 10篇 |
2015年 | 6篇 |
2014年 | 5篇 |
2013年 | 8篇 |
2012年 | 17篇 |
2011年 | 14篇 |
2010年 | 12篇 |
2009年 | 9篇 |
2008年 | 9篇 |
2007年 | 17篇 |
2006年 | 17篇 |
2005年 | 15篇 |
2004年 | 13篇 |
2003年 | 23篇 |
2002年 | 14篇 |
2001年 | 9篇 |
2000年 | 7篇 |
1999年 | 8篇 |
1998年 | 8篇 |
1997年 | 7篇 |
1996年 | 8篇 |
1995年 | 5篇 |
1994年 | 5篇 |
1993年 | 1篇 |
1991年 | 1篇 |
排序方式: 共有279条查询结果,搜索用时 31 毫秒
81.
82.
台湾与广州观光农园对比研究 总被引:4,自引:1,他引:4
台湾观光农园(台湾称休闲农场)是农业生产适应休闲旅游发展的产物,是利用农业生产项目的第一过程进行“包装”推销、提供游观赏、参与、体验、品尝与购物等旅游活动,从而使农业生产与休闲旅游形成发展链。广州发展观光农业的条件基础不逊色于台湾,但现实上是落后了。为此,广州要以农业土特产生产为观光农业突破口,对观光农园进行科学化规划、基地化建设、规模化经营,重点建设3个多样性、规模性、多品种、示范性农业土特产观光农园,从而带动促进广州观光农园全面发展。 相似文献
83.
84.
Cornelis VanderPost 《GeoJournal》2007,69(4):223-237
This work assesses current geographic prospects for large-scale conservation of Africa’s mammals on the basis of statistics
on wildlife habitat, elephant numbers, political stability and potential for environmental tourism and concludes that these
prospects depend on events in a small number of eastern and southern African (core) countries, geographically grouped into
a ‘safari-belt’ between South-Africa and Kenya. Additional countries with good potential are connected to this belt. African
countries need more global scientific support for their conservation efforts, particularly with respect to ongoing trans-boundary
conservation efforts. 相似文献
85.
"冰臼"与地质遗迹旅游开发问题的讨论 总被引:4,自引:0,他引:4
地质遗迹是指在地球演化的漫长地质历史时期,由内外动力的地质作用形成、发展并遗留下来的珍贵的不可再生的地质自然遗产。加强地质遗迹的保护并对其进行科学而合理的旅游开发,可以促进地方经济的发展。相反,不合理甚至不科学的旅游开发,虽然获得了短期的经济效益,却不利于普及地质科学知识,甚至伤害广大游客的感情。文中对广东境内及其周边的几处“冰臼”进行了再讨论,并在考察和评价饶平“南国冰臼公园”的基础上,对地质遗迹的科学开发提出若干思考。 相似文献
86.
87.
88.
石林旅游对农村发展影响的初步研究 总被引:2,自引:0,他引:2
通过对县域国民生产总值、财政税收、农民收入、农村就业结构、农村社会文化等方面与旅游发展的对比分析,研究了石林旅游对农村发展的作用和影响。结果表明,石林旅游对农村发展有一定的影响力,但不显著,空间上呈现“距离衰减效应” ,对农民的经济收入效用十分有限,作者对上述结果产生的原因进行了讨论。 相似文献
89.
Spatial differentiation of tourism impact based on the perception of residents in mountainous valley resorts 总被引:1,自引:1,他引:0
Valley economy is a type of economy that comprehensively utilizes the natural economic and social resources of the region based on environmental protection. This economy utilizes the basic role of the market in disposing resources and achieving regional development and social progress. In this paper we studied the town of Yanqi, a valley resort that has developed tourism-based valley economy for several years in the mountainous area of Beijing. This research identifies the spatial differentiation of tourism-related economic, socio-cultural, and environmental impact and level of support for tourism according to the perception and attitude of residents of Yanqi. The research area was divided into three zones (i.e., core, transition, and peripheral) according to the standard proposed by Jaakson. The residents in all three zones showed a positive attitude toward the tourism industry, and the residents in the core zone had a stronger perception toward the impact of tourism. However, several items indicated the converse. Correlation analysis and analysis of variance were used to explore the correlative factors associated with the attitudes of residents toward the tourism industry. Results indicated major differences among the three zones. Multiple factors, including natural conditions, policies, scenic spots, dependence on the tourism industry, and external investment in the three zones resulted in the spatial differentiationof the perception and attitude of residents toward the impact of tourism. 相似文献
90.
The effect of tourism on water environments has received a high degree of interest in the study of eco-tourism.Based on the analysis of the relationship between tourist activities and the water environment in the Liupan Mountain eco-tourism zone,the case study area,a Water Environment of Tourism Area Model(WETAM) is built to simulate the temporal and spatial changes in water quality and the response saturation thresholds under four sewage treatment scenarios.The results imply the following:(1) WETAM performs well in modeling a water environment to represent the dynamic process of water quality change in response to tourist activities.(2) Under four sewage treatment scenarios(fundamental,low,medium,and high),the threshold shows an obvious uptrend.(3) The response threshold of water quality with respect to the interference of tourist activities fluctuates seasonally due to changes in tourist density.(4) The thresholds differ significantly among five tourism functional areas.According to the response saturation threshold of the water environment,effective control based on the scale and intensity of tourist activities is important for a successful transformation of this tourism destination's development strategies.Therefore,the integrated management of water pollution in tourism areas plays a crucial role in sustainable tourism development. 相似文献