全文获取类型
收费全文 | 202篇 |
免费 | 4篇 |
出版年
2023年 | 1篇 |
2021年 | 3篇 |
2020年 | 1篇 |
2019年 | 7篇 |
2018年 | 9篇 |
2017年 | 3篇 |
2016年 | 4篇 |
2015年 | 9篇 |
2014年 | 2篇 |
2013年 | 77篇 |
2012年 | 2篇 |
2011年 | 4篇 |
2010年 | 3篇 |
2009年 | 3篇 |
2008年 | 1篇 |
2007年 | 2篇 |
2006年 | 2篇 |
2005年 | 3篇 |
2004年 | 2篇 |
2003年 | 3篇 |
2002年 | 4篇 |
2001年 | 2篇 |
2000年 | 1篇 |
1999年 | 2篇 |
1997年 | 4篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1987年 | 4篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1983年 | 2篇 |
1982年 | 6篇 |
1981年 | 2篇 |
1979年 | 1篇 |
1977年 | 3篇 |
1976年 | 3篇 |
1975年 | 3篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1971年 | 2篇 |
1964年 | 1篇 |
1962年 | 2篇 |
1957年 | 1篇 |
排序方式: 共有206条查询结果,搜索用时 15 毫秒
31.
In the last 15 years, the regional scale was used to implement innovation strategies in European Union. Departing from the discussion of the relevance of innovation policy at the regional level, the article benefits from the knowledge production function framework to estimate patterns considering 175 European regions. It is intended to understand whether regional innovation strategies developed and applied between 1994 and 2001 were successful at an aggregated level in contributing for knowledge creation measured in terms of patents and high technology patents. The results underline the relevance of private R&D expenditure and medium and high technology employment to increase patent numbers. The models suggest also that administrative regionalization may be important to regional innovation and that the creation and implementation of a regional strategy have a positive contribution for high tech innovation. 相似文献
32.
奧荷莉 《Revue de synthèse / Centre international de synthèse》2011,132(3):369-386
The study of the financing of documentary films in France by its two main sources (TV channels and the film industry) enables us to uncover the conditions of possibility of the autonomy of filmmakers. It reveals an opposition between two patterns: a logic of “flows” within the audiovisual circuit (television) and a logic of “scarcity” within the film circuit, completed by new forms of financial support. 相似文献
33.
In this paper, we explore regional innovation in the use of varieties of algae as inputs to industrial processes. It is important to understand that algae are one of nature's most bountiful products, with an almost infinite variety of applications. Algae have received prominence in the research literature because of the strong evidence that they can make a major contribution to the production and—importantly—storage of renewable energy. Following the introduction to this paper, Section 2 reviews the nature and application of algae in two main aspects of clean energy production: first as biogasolene or biodiesel; second as large-scale storage batteries for electricity. The latter is particularly important as one classic deficiency of electricity is the difficulty in storing it for lengthy periods other than in short-life batteries. However (Section 3), there are other uses for algae, ranging from aquaculture to medicine and the production of cosmetics. In the southwest corner of the Iberian Peninsula, between Faro in Portugal through Huelva to Cadiz in Spain, is a significant research and commercial algae production zone. The paper describes the key system elements in play in this trans-border innovation network and considers prospects for new path creation towards biofuels, the main research and application centres for which are in the San Francisco Bay Area in California. Conclusions and recommendations for policy action are then drawn. 相似文献
34.
Louis A. Woods 《Journal of Cultural Geography》2013,30(2):101-118
Cattle festivals and cattle rites are much neglected elements of the Indian cattle complex. This study examines Gopashtami and Govardhan Puja, two cattle festivals identified with the cult of Krishna. Although Krishna assumes several aspects in Hinduism, the pastoral Krishna is one of the most popular forms of the deity. Gopashtami and Govardhan Puja are important festivals in Braj, the traditional homeland of the cowherd god. Their origins can be traced to medieval Hindu texts, but Govardhan Puja contains ritual elements that suggest ancient rites have been absorbed into a later Hindu festival. Gopashtami and Govardhan Puja, like any religious festival, can be interpreted at several different levels. They have symbolic meaning, raising questions of conflicting religious traditions or economic systems in the past. They mirror regional patterns of culture and historical tradition in India. They assume a range of social functions, and in addition, form part of the process by which people are exposed to their cultural heritage. Above all, however, they are festivals dedicated to cattle and to the cowherd god Krishna. The myths and rituals of Gopashtami and Govardhan Puja reflect the strong historical ties between Krishna and the cow, as well as reinforce traditional Hindu concepts concerning the sanctity of the cow. 相似文献
35.
36.
37.
38.
Globalization did not create convergence to a unique economic model among countries. Even in developed countries, the answers to the pressures of markets underline the existence of a variety of capitalisms. The analysis of innovation systems, in particular at the national level, is adequate as a preliminary approach to understand the diversity of profiles and institutional architectures. The article benefits from the broader notion of national innovation system to understand the profiles of 15 European countries. By analysing central building blocks and institutional complementarities through the creation of indexes based on 64 variables and a cluster analysis, it was possible to understand the different levels of institutional efficiency in the analysed dimensions for the selected groups of countries. 相似文献
39.
Irving Louis Horowitz 《Perspectives on Political Science》2013,42(3):160-165
Abstract The purpose of this commentary is to explore the sources of decision-making by President Obama. Specifically, the article notes his strong foundation in legal education, law journal editing, and early occupational activities related to law practice. It is observed that a legalist cast of mind rather than broad statements about race, class, and nation define the Obama early period in office. These considerations are often at the center of presidential options chosen, especially in areas of foreign policy and global challenges. The article claims that “legalism” serves to place serious limits on initiatives and independent actions, but also serves to put a brake on tendencies to impose a new imperial presidency. Such ideological checks and balances show unique dimensions to this president, but also continuity with past limits to extremism. 相似文献
40.