全文获取类型
收费全文 | 1486篇 |
免费 | 3篇 |
专业分类
各国政治 | 25篇 |
工人农民 | 147篇 |
世界政治 | 14篇 |
外交国际关系 | 26篇 |
法律 | 1143篇 |
中国政治 | 8篇 |
政治理论 | 122篇 |
综合类 | 4篇 |
出版年
2021年 | 5篇 |
2018年 | 81篇 |
2017年 | 14篇 |
2016年 | 92篇 |
2015年 | 21篇 |
2014年 | 7篇 |
2013年 | 17篇 |
2012年 | 124篇 |
2011年 | 86篇 |
2010年 | 9篇 |
2009年 | 23篇 |
2008年 | 10篇 |
2007年 | 11篇 |
2006年 | 15篇 |
2005年 | 389篇 |
2004年 | 102篇 |
2003年 | 21篇 |
2002年 | 10篇 |
2001年 | 17篇 |
1999年 | 13篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1992年 | 21篇 |
1991年 | 22篇 |
1990年 | 29篇 |
1989年 | 39篇 |
1988年 | 28篇 |
1987年 | 27篇 |
1986年 | 30篇 |
1985年 | 20篇 |
1984年 | 13篇 |
1983年 | 14篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1980年 | 3篇 |
1979年 | 10篇 |
1978年 | 10篇 |
1977年 | 5篇 |
1976年 | 1篇 |
1975年 | 14篇 |
1974年 | 24篇 |
1973年 | 14篇 |
1972年 | 16篇 |
1971年 | 19篇 |
1970年 | 13篇 |
1969年 | 7篇 |
1968年 | 11篇 |
1967年 | 9篇 |
1966年 | 5篇 |
1965年 | 5篇 |
排序方式: 共有1489条查询结果,搜索用时 15 毫秒
981.
Kuo-Feng?HuangEmail author Chwo-Ming?Joseph?Yu 《The Journal of Technology Transfer》2011,36(4):383-403
A firm can improve its innovation either by its internal research and development (R&D) efforts or by forming external collaborative
R&D alliances. While previous studies on R&D collaboration and knowledge diffusion mainly focus on various external sources
of R&D collaboration, little effort has been made to investigate the joint impact of competitive and non-competitive R&D collaborations
on firm innovation simultaneously. By examining the data of 165 Taiwanese firms in the information and communication technology
industry, we find that: (1) non-competitive R&D collaborations with universities have a positive direct impact on firm’s innovation
performance; and (2) both non-competitive and competitive R&D collaborations have a positively moderating effect on the relationship
between a firm’s internal R&D efforts and firm innovation and the positive moderating effect is higher for non-competitive
R&D collaborations than that of competitive R&D collaborations. These findings suggest that R&D collaborations, either non-competitive
or competitive, exhibit the nature of a win–win situation. We also derive implications for firms’ selection of R&D alliance
partners and government policies. 相似文献
982.
Timonen M Mäkikyrö T Miettunen J Hakko H Zitting P Kinnunen J Räsänen P;Northern Finland Birth Cohort Study 《Forensic science international》2003,132(1):68-75
OBJECTIVE: The aim of this study was to investigate the association between adverse physical disorders and violent/non-violent criminal behaviour. DESIGN: The study material consisted of the large, prospectively followed, unselected and genetically homogeneous Northern Finland 1966 Birth Cohort, the Finnish Hospital Discharge Registers and the National Crime Register (n=10934). MAIN RESULTS: The results of the logistic regression analyses showed that male offenders had statistically significantly more injuries (adj. OR=1.81, 95% CI=1.51-2.17), when compared with males without a criminal history. Violent male offenders exhibited greater morbidity to the diseases of the respiratory system (adj. OR=1.64, 95% CI=1.03-2.60) when compared with non-violent criminals. Female offenders suffered more commonly from poisonings (adj. OR=3.84, 95% CI=1.69-8.72), injuries (adj. OR=2.79, 95% CI=1.67-4.66), infections (adj. OR=1.87, 95% CI=1.16-2.99) and indefinite symptoms (adj. OR=2.02, 95% CI=1.20-3.40) than non-offending females. CONCLUSIONS: At epidemiological level, criminal behaviour seems to be associated especially with an increased risk of injuries for both sexes. The observed increase of the diseases of the respiratory system among violent but not among non-violent males calls for further investigations. 相似文献
983.
Andreas B?genholm & Nicholas Charron 《West European politics》2014,37(5):903-931
In this article, two unexplored trends in European electoral politics are highlighted. Using newly collected data the article tracks the politicisation of corruption in electoral campaigns from 1981 to 2011, an electoral strategy that has been increasing over time in most European countries. It then empirically tests two aspects of this campaign strategy. First, what are the factors that are systematically associated with a party’s decision to politicise corruption? Second, what are the electoral effects in terms of relative vote share for parties that politicise corruption? Using an original data-set that employs multi-level data (parties nested in countries) the results demonstrate first that politicisation of corruption occurs systematically more often among established parties from the main opposition, new parties and parties on the political right, and occurs as a function of country-level corruption, district magnitude and public party financing. Second, it is found that the main opposition and new parties that use such a campaign strategy make significant electoral gains relative to the previous election compared to parties that do not politicise corruption. Yet gains are offset in low-corruption countries. The findings demonstrate salient implications for research on party systems, corruption studies and democratic legitimacy, among other areas of investigation. 相似文献
984.
985.
J?rgen Holten J?rgensen Geir H?nneland 《Journal of International Wildlife Law & Policy》2013,16(1):33-53
The article discusses Russian implementation of the Ramsar Convention, the World Heritage Convention, CITES and the Convention on Biological Diversity. The country's international obligations are part of Russian law, but little has been done by Russian authorities to implement the agreements on the ground. Compliance with the international agreements is the result of Russian protection measures that exist independently of the conventions. Environmental concerns have been given reduced priority since the early 1990s. An independent environmental protection agency no longer exists, and the number of inspectors has been drastically reduced. Implementation activities are undertaken primarily by international NGOs, and partly by regional authorities. 相似文献
986.
Michael?W.?Gruszczynski Amanda?Balzer Carly?M.?Jacobs Kevin?B.?Smith John?R.?HibbingEmail author 《Political Behavior》2013,35(1):135-152
Political involvement varies markedly across people. Traditional explanations for this variation tend to rely on demographic variables and self-reported, overtly political concepts. In this article, we expand the range of possible explanatory variables by hypothesizing that a correlation exists between political involvement and physiological predispositions. We measure physiology by computing the degree to which electrodermal activity changes on average when a participant sequentially views a full range of differentially valenced stimuli. Our findings indicate that individuals with higher electrodermal responsiveness are also more likely to participate actively in politics. This relationship holds even after the effects of traditional demographic variables are taken into account, suggesting that physiological responsiveness independently contributes to a fuller understanding of the underlying sources of variation in political involvement. 相似文献
987.
Using the Purkinje cells of the cerebellum from 42 rapidly and 28 slowly dying patients, we tried to find a correlation between the premortal hypoxie in brain and the result of HBFP staining. We found four different stages of staining and discuss here the causes of staining and false results. 相似文献
988.
The effect of the unrestrained back seat passenger on the injuries suffered by drivers and front seat passengers in head-on collisions 总被引:1,自引:0,他引:1
In head-on collisions, loose items in the rear of the car, such as luggage or unrestrained back seat passengers can cause substantial loading on the back of the front seats. The purpose of this paper is to study if such loading increases the injury severity for the front seat occupants. Data were collected from all fatal automobile accidents for a period of 1 year in Sweden. Information was collected about the survivors as well as the decreased. Head-on collisions were selected, and the injuries of the front seat occupants were scored according to the Abbreviated Injury Scale (AIS) and the Injury Severity Score (ISS). In evaluating the injury severity, the collision energy was taken into account. The results indicate that belted front seat passengers sustain a higher injury risk with an unrestrained passenger in the back seat. These results are valid for collision speeds below 45 km/h. 相似文献
989.
990.
Introduction to the special issue on Swedish quantitative criminology 相似文献