全文获取类型
收费全文 | 3649篇 |
免费 | 203篇 |
国内免费 | 50篇 |
专业分类
财政金融 | 89篇 |
工业经济 | 125篇 |
计划管理 | 605篇 |
经济学 | 1298篇 |
综合类 | 473篇 |
运输经济 | 25篇 |
旅游经济 | 79篇 |
贸易经济 | 312篇 |
农业经济 | 547篇 |
经济概况 | 349篇 |
出版年
2024年 | 16篇 |
2023年 | 39篇 |
2022年 | 221篇 |
2021年 | 134篇 |
2020年 | 347篇 |
2019年 | 276篇 |
2018年 | 34篇 |
2017年 | 68篇 |
2016年 | 69篇 |
2015年 | 91篇 |
2014年 | 151篇 |
2013年 | 166篇 |
2012年 | 286篇 |
2011年 | 340篇 |
2010年 | 276篇 |
2009年 | 224篇 |
2008年 | 245篇 |
2007年 | 268篇 |
2006年 | 198篇 |
2005年 | 120篇 |
2004年 | 93篇 |
2003年 | 62篇 |
2002年 | 56篇 |
2001年 | 56篇 |
2000年 | 31篇 |
1999年 | 17篇 |
1998年 | 5篇 |
1997年 | 1篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 3篇 |
1992年 | 1篇 |
1985年 | 1篇 |
1982年 | 1篇 |
排序方式: 共有3902条查询结果,搜索用时 140 毫秒
101.
The forest and landscape restoration (FLR) targets set as part of the Bonn Challenge draw attention to the governance arrangements required to translate national FLR targets into local action. To achieve the targets, actors at multiple levels of the governance scale aim to influence relevant processes on the ecological scale. In this article, we focus on the scale challenges relating to the implementation of Ecuador’s restoration targets, by analysing the implementation of the 2014–2017 National Forest Restoration Plan in the montane Chocó Andino and Bosque Seco landscapes. From 54 semi-structured interviews, a document review, and geographical data analysis, we identified two temporal (i, ii) and three spatial scale challenges (iii, iv, v): i) Political cycles mismatch with FLR timelines; ii) Planning horizons mismatch with FLR timelines; iii) National restoration objectives mismatch with decentralised land use planning realities; iv) The governance level of existing FLR efforts mismatches with the level receiving restoration funds; and v) Tensions exist between the spatial dimensions of biodiversity and water-related restoration efforts. The findings highlight that more attention must be given to scale-sensitive governance to make the process in which national FLR targets are translated into local action more effective. 相似文献
102.
Delineating travel patterns and city structure has long been a core research topic in transport geography. Different from the physical structure, the city structure beneath the complex travel-flow system shows the inherent connection patterns within the city. On the basis of taxi-trip data from Shanghai, we built spatially embedded networks to model intra-city spatial interactions and to introduce network science methods into the analysis. The community detection method is applied to reveal sub-regional structures, and several network measures are used to examine the properties of sub-regions. Considering the differences between long- and short-distance trips, we reveal a two-level hierarchical polycentric city structure in Shanghai. Further explorations of sub-network structures demonstrate that urban sub-regions have broader internal spatial interactions, while suburban centers are more influential on local traffic. By incorporating the land use of centers from a travel-pattern perspective, we investigate sub-region formation and the interaction patterns of center–local places. This study provides insights into using emerging data sources to reveal travel patterns and city structures, which could potentially aid in developing and applying urban transportation policies. The sub-regional structures revealed in this study are more easily interpreted for transportation-related issues than for other structures, such as administrative divisions. 相似文献
103.
随着我国社会主义现代化建设和城市化建设进程不断加快,人们对自然资源的过渡开发与利用,带来了诸多环境问题。为提高我国园林生态水平,相关部门应认识到我国园林用水的现状,并积极开发和设计节水型园林,大力推广节水灌溉,优化各类植物配置,加强园林人力资源管理,提高人们的节水意识,从而为建设节水型园林奠定坚实的基础。 相似文献
104.
园林作为一种文化载体,其美学思想的演变过程既
是社会形态演变的外化,也是历史阶段人与自然关系的折射。
从风景园林史学与美学的双重视角,解读桂林山水园林的审美
历程。研究发现,桂林山水园林审美文化的发展可划分为寻形
赋情、重理塑神和意蕴相生3个阶段,发展过程具有渐进性、
层累性,是人文性和艺术性不断递进的过程。其园林审美特质
表现为以自然为本源、整体的环境观和丰富的审美联想。研究
为桂林园林文化的传承发展及当代城市风景建设提供一定的理
论支持,并对岭南风景园林史的完善具有推进意义。 相似文献
105.
Rewilding and restoring cultural landscapes in Mediterranean mountains: Opportunities and challenges
Farmland abandonment and the decline of livestock activity in the Mediterranean mountains have resulted in dramatic landscape changes, including the generalized expansion of shrublands and forests, and the homogenization of the old cultural landscapes. This process has a variety of consequences from ecological, geomorphological and hydrological points of view, as well as from the perspectives of land management and public awareness. An intense debate currently surrounds the discussion and evaluation of rewilding (the process of passively allowing woody encroachment, as well as the reintroduction of large mammals) as an opportunity for enhancing biodiversity and restoring original landscapes after centuries of human activity versus ecological restoration (activities leading to the recovery of degraded ecosystems, including clearing and light human activity). There is no clear consensus regarding the best way to improve the ecological relationships and functioning within an ecosystem. Biodiversity and sustainability can be seen under different levels of human pressure and landscape transformation; total farmland abandonment is not always the best alternative, particularly when local inhabitants aim to sustain themselves using local resources. Many geographers and ecologists consider that extensive stockbreeding in a partially open landscape is a rational way to (i) improve landscape organization, (ii) increase flows and turnover within the ecosystems, (iii) increase the diversity of plants and animals that benefit from a relatively light human presence, and (iv) reduce wildfire risk. However, it has proven challenging for land managers and stockbreeders to clear the best old abandoned fields and “construct” a sustainable, balanced landscape that combines forests, shrublands and open lands. Private landowner involvement and support from the general public is crucial for both funding and the long-term maintenance of benefits. The best old fields should be cleared in the context of high-resolution knowledge of the topography, grassland characteristics, grassland cycles and livestock management. Such efforts are likely to be an excellent opportunity to introduce compatibility between light human activity and increases in biodiversity and sustainability for many marginal mountains, where land abandonment and general forest/shrub recovery are the inevitable tendencies. This paper examines some of the contrasting positions of the scientific community regarding the rewilding or ecological restoration of mountain landscapes, and briefly highlights some experiences in which intentional clearing of old abandoned fields has benefited stockbreeding, biodiversity, runoff generation and wildfire risks. Notably, we describe a sub-Mediterranean valley of the Iberian Range, Northern Spain, as an example. In the long term, we find that the intentional clearing of the best old fields allows the slow organization of a final landscape that will be more useful for local inhabitants, thereby helping to reverse human depopulation in these regions. 相似文献
106.
Hwasung Song 《Asia Pacific Journal of Tourism Research》2018,23(2):133-145
This study examined the travel motivation of international students in Korea using the theory of travel career pattern (TCP). In particular, latent profile analysis (LPA) was applied to identify latent classes within international students. Based on the results, four latent profiles were derived and named “Core,” “Longing,” “Middle,” and “Veteran.” The results described the travel motivation and patterns across these four profiles to enhance the understanding of international students in the context of tourism. There were significant differences in travel patterns (i.e. travel companion and information sources) among the profiles segmented by motivation. This study has expanded travel motivation research by (a) applying TCP to an understudied population (i.e. international students in a non-English-speaking country); (b) comparing travel careers between the home country, Korea (i.e. a study abroad destination), and the third countries; and (c) highlighting LPA as a clustering tool to understand travel motivation. 相似文献
107.
108.
德国租借时期的青岛园林在中国近代园林中独树一帜,是世界范围的造林典范,是从造林到造园的成功探索,城市层面的建设意义突出。以史志、老照片、规划图与建设状况图等史实为依据,结合现场调研,梳理青岛园林规划,揭示其城市设计、科学生态、林业生产以及经济实用的规划思想。考证出公园、绿地以及林荫道布局在城市重要功能区;这些公园绿地既受到德国近代思潮的影响,又在地域环境中追求自然之美与森林化景观效果。希望理清青岛德国租借时期园林建设的状况,对当前我国城乡园林建设有所启发。 相似文献
109.
陈小梅 《福建商业高等专科学校学报》2014,(1):73-77
在校园文化建设中,景观建设是其基本内容。商专校园文化景观贯穿继承与弘扬"闽商精神"的根本理念,将几大文化板块相融通,构造出丰富多彩的内容。探讨校园文化景观与心理健康教育的关系,结合相关的基础理论,分析校园文化景观对心理健康教育的多重积极作用,使心理健康教育的情境化教学方式落到实处,有益于心理健康教育的良性发展,对深化高校心理健康教育的多样化途径的认识与理解也有借鉴作用。 相似文献
110.
招牌作为企业的标志,起到树立企业文化、表现企业精神及吸引消费者等目的。本文通过对南京路步行街61家企业商铺招牌的放置形式、字体、主色调和招牌质地的研究分析,提出放置形式的多样化、字体选择的“企业化”、质地材料的新颖化和色彩表现的情感化等招牌设计策略,以期达到进一步丰富商业街的景观文化、美化城市的目的。 相似文献