全文获取类型
收费全文 | 3849篇 |
免费 | 67篇 |
国内免费 | 8篇 |
专业分类
教育 | 2869篇 |
科学研究 | 264篇 |
各国文化 | 33篇 |
体育 | 450篇 |
综合类 | 9篇 |
文化理论 | 67篇 |
信息传播 | 232篇 |
出版年
2023年 | 32篇 |
2022年 | 57篇 |
2021年 | 79篇 |
2020年 | 129篇 |
2019年 | 205篇 |
2018年 | 269篇 |
2017年 | 263篇 |
2016年 | 194篇 |
2015年 | 129篇 |
2014年 | 134篇 |
2013年 | 839篇 |
2012年 | 143篇 |
2011年 | 106篇 |
2010年 | 97篇 |
2009年 | 103篇 |
2008年 | 79篇 |
2007年 | 73篇 |
2006年 | 80篇 |
2005年 | 61篇 |
2004年 | 54篇 |
2003年 | 61篇 |
2002年 | 54篇 |
2001年 | 52篇 |
2000年 | 37篇 |
1999年 | 36篇 |
1998年 | 27篇 |
1997年 | 25篇 |
1996年 | 33篇 |
1995年 | 26篇 |
1994年 | 27篇 |
1993年 | 23篇 |
1992年 | 16篇 |
1991年 | 20篇 |
1990年 | 21篇 |
1989年 | 28篇 |
1988年 | 20篇 |
1987年 | 24篇 |
1986年 | 11篇 |
1985年 | 9篇 |
1984年 | 11篇 |
1982年 | 14篇 |
1981年 | 14篇 |
1980年 | 9篇 |
1979年 | 17篇 |
1978年 | 10篇 |
1977年 | 8篇 |
1976年 | 15篇 |
1975年 | 13篇 |
1974年 | 9篇 |
1970年 | 8篇 |
排序方式: 共有3924条查询结果,搜索用时 17 毫秒
11.
12.
György Péteri 《Minerva》1996,34(4):367-380
Conclusions On the basis of these findings, I suggest that the structure and organisation of the field of Hungarian economics under state socialism should be described as a case of partitioned bureaucracy.9 The compromise between research economists and the political elite in the New Course era between 1953 and 195510 survived the post-1956 reaction in so far as political economy, with its predominantly legitimatory and ideological functions, remained partitioned from the other sectors in the field through the remainder of the state-socialist period. This secured considerable protection both for Marxist-Leninist political economy—which faced the destabilising effects of exposure to the findings of serious empirical research—and for the other sectors, which were professionally oriented and earnestly interested in the pursuit of unbiased empirical research, free from stifling agitprop interference. Our data concerning the reputational control of the field reflects only one, although very important, aspect of this partitioning. Another and much plainer aspect is that, from the early 1960s, the Agitation and Propaganda Department of the Central Committee no longer exercised control over the field, except in the political economy sector.The proposition about the mechanism paradigm should not be taken seriously as a statement of a Kuhnian type of intellectual organisation of Hungarian economics, with reform economics at its hard theoretical core. But it should certainly be taken seriously as a reflection of the sociopolitical structure which emerged and developed from the mid-1950s onwards. Neither the politicians nor the economists saw as necessary or even contemplated the integration of Hungarian economic research with Western mainstream economic thought. In exchange for the professional expertise and socio-economic intelligence necessary for the exercise of power, Hungary's state-socialist political class offered their economists relative autonomy and freedom from interference. The price the economists had to pay was partly to refrain from openly and systematically challenging the beliefs perpetuated by the political economy of socialism, and partly to accept in their research the paramountcy of policy orientation. But this burden they assumed willingly since it made them the only group within Hungary's academic intelligentsia—indeed, the only group in Hungarian society outside the political class—with the privilege of being coopted to the institutions with power over some restricted domains of policymaking. After 1989, especially under the conservative Antall government, this proved less than advantageous.11 Although the benevolence of many critics is open to question, it could greatly benefit the field if the economists' expulsion from contemporary politics went hand in hand with provision of the material, intellectual and institutional conditions for a new approach where a fundamentally scientific orientation is paramount. 相似文献
13.
14.
Krister Lindén 《Information Retrieval》2006,9(3):295-310
Technical term translations are important for cross-lingual information retrieval. In many languages, new technical terms
have a common origin rendered with different spelling of the underlying sounds, also known as cross-lingual spelling variants
(CLSV).
To find the best CLSV in a text database index, we contribute a formulation of the problem in a probabilistic framework, and
implement this with an instance of the general edit distance using weighted finite-state transducers. Some training data is
required when estimating the costs for the general edit distance. We demonstrate that after some basic training our new multilingual
model is robust and requires little or no adaptation for covering additional languages, as the model takes advantage of language
independent transliteration patterns.
We train the model with medical terms in seven languages and test it with terms from varied domains in six languages. Two
test languages are not in the training data. Against a large text database index, we achieve 64–78 % precision at the point
of 100% recall. This is a relative improvement of 22% on the simple edit distance. 相似文献
15.
16.
Around 1960, the politics of the emerging media society in Sweden tended to fixate the formative functions of mass communication. The monopoly of public service broadcast media, press subsidies and new tendencies in film policy were some of the issues around which uncertainty prevailed. New methods to provide reliable data were sought by politicians, since empirical facts were required as arguments for an updated media policy. This article examines the different ways that the field of media studies was introduced in Sweden between 1960 and 1980. We argue that Swedish academic media studies departed from, and emerged within, a rather diffuse borderland between industry, politics and academia. The formation of national media research in Sweden can partly be seen as an effect of politicians and the media industry wanting to be better informed on issues such as media influence, media ownership and the habits and composition of the media audience. 相似文献
17.
Against the backdrop of Spain’s Transparency Act, this article discusses the presence or otherwise of a series of document types, proposed as management-related transparency indicators, on 61 (8 national and 53 provincial) historic archive websites. Although examples of good practice were identified, the information provided was found to be scant, in particular as regards lines of action, organisational objectives and yearly reports. The information most commonly provided on the websites included the collection classification chart, service use regulations and citizen charters. The inference drawn was that archives, so intently focused on their role in the application of the Act by the organisations they serve, neglect their own administrative obligations in respect of its provisions. The recommendation is that as government-funded and subsidised public service institutions, historic archives should exercise transparency by furnishing the information stipulated in the Act on their websites. 相似文献
18.
Flávia Gomes-Franco e Silva Juliana Colussi Paula Melani Rocha 《Journal of Radio & Audio Media》2018,25(1):77-91
This study was conducted in an environment of widespread use of social media and mobile applications in the mass media. The general goal of the study was to analyze the use of WhatsApp in cybermedia, specifically in radio. A case study was proposed to examine the use of WhatsApp on the program Las mañanas de RNE, broadcast by Spanish National Radio. It was found that the public was very accepting of the program’s initiative to solicit WhatsApp voice messages, beginning in November 2015. The case study used audio files of a direct broadcast that included specific times for audience participation. The use of WhatsApp was accepted by the audience, in addition to the use of the conventional telephone, as a tool well-suited to listener participation in radio programming. Finally, the study highlights the importance of interactive, participatory spaces in broadcasts through the creation of synergies with new forms of online participation. 相似文献
19.
The purpose of this study is to find a theoretically grounded, practically applicable and useful granularity level of an algorithmically constructed publication-level classification of research publications (ACPLC). The level addressed is the level of research topics. The methodology we propose uses synthesis papers and their reference articles to construct a baseline classification. A dataset of about 31 million publications, and their mutual citations relations, is used to obtain several ACPLCs of different granularity. Each ACPLC is compared to the baseline classification and the best performing ACPLC is identified. The results of two case studies show that the topics of the cases are closely associated with different classes of the identified ACPLC, and that these classes tend to treat only one topic. Further, the class size variation is moderate, and only a small proportion of the publications belong to very small classes. For these reasons, we conclude that the proposed methodology is suitable to determine the topic granularity level of an ACPLC and that the ACPLC identified by this methodology is useful for bibliometric analyses. 相似文献
20.
Two randomised control experiments examined spelling outcomes in a repeated measures design (pre‐test, post‐tests; 1‐day, 1‐month follow‐up, 5‐month follow‐up), where students learned Spanish irregular words through (1) immediate feedback using self‐correction, (2) visual imagery where children imagine and represent words using movement, and (3) copying words. The two control groups engaged in reading and dictation. We expected that methods with kinesthetic components and segmentation of stimuli would yield better orthographic representations in memory. Results showed that orthographic errors on Spanish irregular words diminish when children receive self‐correction instruction. Imagery and copy instruction also reduce these errors, but less consistently. Five months later, self‐correction group maintained their advantage in spelling compared with students who read or performed dictation. Experiment 2 replicated the spelling instruction effects and showed large effects on children who had hardly received any spelling instruction in Spanish. Results indicate that research‐based practices can significantly improve spelling outcomes in primary children. 相似文献