全文获取类型
收费全文 | 853篇 |
免费 | 49篇 |
专业分类
各国政治 | 74篇 |
工人农民 | 89篇 |
世界政治 | 79篇 |
外交国际关系 | 47篇 |
法律 | 432篇 |
中国共产党 | 1篇 |
中国政治 | 6篇 |
政治理论 | 172篇 |
综合类 | 2篇 |
出版年
2024年 | 2篇 |
2023年 | 6篇 |
2022年 | 6篇 |
2021年 | 9篇 |
2020年 | 30篇 |
2019年 | 38篇 |
2018年 | 51篇 |
2017年 | 56篇 |
2016年 | 56篇 |
2015年 | 29篇 |
2014年 | 49篇 |
2013年 | 148篇 |
2012年 | 31篇 |
2011年 | 39篇 |
2010年 | 34篇 |
2009年 | 31篇 |
2008年 | 24篇 |
2007年 | 29篇 |
2006年 | 23篇 |
2005年 | 35篇 |
2004年 | 25篇 |
2003年 | 35篇 |
2002年 | 26篇 |
2001年 | 8篇 |
2000年 | 8篇 |
1999年 | 3篇 |
1998年 | 7篇 |
1997年 | 7篇 |
1996年 | 9篇 |
1995年 | 9篇 |
1994年 | 3篇 |
1993年 | 5篇 |
1992年 | 3篇 |
1991年 | 5篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1987年 | 5篇 |
1986年 | 1篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1980年 | 2篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有902条查询结果,搜索用时 0 毫秒
201.
Luddy M 《Women's history review》2011,20(1):109-126
This article explores the changing experiences and representation of Ireland's unmarried mothers from 1880 to 1973. It focuses on the stigma of illegitimacy in political and cultural discourse and the representation of unmarried mothers as immoral and their children as a drain on resources. These remained constant themes within the discourse of unmarried motherhood in Ireland throughout the nineteenth and twentieth centuries. The article uses the records of philanthropic, government and religious organisations to chart the rising interest in the moral reformation of unmarried mothers at the end of the nineteenth century and rising tolerance towards them by the end of the twentieth century. 相似文献
202.
This article presents a systematic review and meta-analysis of the effectiveness of anti-bullying programs in schools. Studies
were included if they evaluated the effects of an anti-bullying program by comparing an intervention group who received the
program with a control group who did not. Four types of research design were included: a) randomized experiments, b) intervention-control
comparisons with before-and-after measures of bullying, c) other intervention-control comparisons, and d) age-cohort designs.
Both published and unpublished reports were included. All volumes of 35 journals from 1983 up to the end of May 2009 were
hand-searched, as were 18 electronic databases. Reports in languages other than English were also included. A total of 622
reports concerned with bullying prevention were found, and 89 of these reports (describing 53 different program evaluations)
were included in our review. Of the 53 different program evaluations, 44 provided data that permitted the calculation of an
effect size for bullying or victimization. The meta-analysis of these 44 evaluations showed that, overall, school-based anti-bullying
programs are effective: on average, bullying decreased by 20–23% and victimization decreased by 17–20%. Program elements and
intervention components that were associated with a decrease in bullying and victimization were identified, based on feedback
from researchers about the coding of 40 out of 44 programs. More intensive programs were more effective, as were programs
including parent meetings, firm disciplinary methods, and improved playground supervision. Work with peers was associated
with an increase in victimization. It is concluded that the time is ripe to mount a new program of research on the effectiveness
of anti-bullying programs based on these findings. 相似文献
203.
204.
Luís Aguiar‐Conraria Pedro C. Magalhães Maria Joana Soares 《American journal of political science》2012,56(2):500-518
Spectral analysis and ARMA models have been the most common weapons of choice for the detection of cycles in political time series. Controversies about cycles, however, tend to revolve around an issue that both techniques are badly equipped to address: the possibility of irregular cycles without fixed periodicity throughout the entire time series. This has led to two main consequences. On the one hand, proponents of cyclical theories have often dismissed established statistical techniques. On the other hand, proponents of established techniques have dismissed the possibility of cycles without fixed periodicity. Wavelets allow the detection of transient and coexisting cycles and structural breaks in periodicity. In this article, we present the tools of wavelet analysis and apply them to the study of two lingering puzzles in the political science literature: the existence of cycles in election returns in the United States and in the severity of major power wars. 相似文献
205.
Romão W Vaz BG Lalli PM Bueno MI Correa DN Telles VL de Castro EV Eberlin MN 《Journal of forensic sciences》2012,57(2):539-543
Using desorption/ionization techniques such as easy ambient sonic-spray ionization mass spectrometry (EASI-MS), it is possible to analyze documents of Brazilian vehicles for authenticity, providing a chemical profile directly from the surface of each document. A method for the detection of counterfeit documents is described, and the falsification procedure is elucidated. Forty authentic and counterfeit documents were analyzed by both positive and negative ion modes, EASI(±)-MS. EASI(+)-MS results identified the presence of (bis(2-ethylhexyl)phthalate plasticizer and of dihexadecyldimethylammonium biocide in both types of documents. For EASI(-)-MS results, the 4-octyloxybenzoic acid additive ([M + H](+): m/z 249) is present only in counterfeit documents. It was also found that counterfeit vehicle documents are produced via Laserjet printers. Desorption/ionization techniques, such as EASI-MS, offer therefore, an intelligent way to characterize the counterfeiting method. 相似文献
206.
Brion M Allegue C Santori M Gil R Blanco-Verea A Haas C Bartsch C Poster S Madea B Campuzano O Brugada R Carracedo A 《Forensic science international》2012,219(1-3):278-281
In developed countries, sudden infant death syndrome (SIDS) represents the most prevalent cause of death in children between 1 month and 1 year of age. SIDS is a diagnosis of exclusion, a negative autopsy which requires the absence of structural organ disease. Although investigators have confirmed that a significant percentage of SIDS cases are actually channelopathies, no data have been made available as to whether other sudden cardiac death-associated diseases, such as hypertrophic cardiomyopathy (HCM), could be responsible for some cases of SIDS. The presence of a genetic mutation in the sarcomeric protein usually affects the force of contraction of the myocyte, whose weakness is compensated with progressive hypertrophy and disarray. However, it is unclear whether in the most incipient forms, that is, first years of life, the lack of these phenotypes still confers a risk of arrhythmogenesis. The main goal of the present study is to wonder whether genetic defects in the sarcomeric proteins, previously associated with HCM, could be responsible for SIDS. We have analysed 286 SIDS cases for the most common genes implicated in HCM in adults. A total of 680 mutations localised in 16 genes were analysed by semi-automated matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDITOF-MS) using the Sequenom MassARRAY(?) System. Ten subjects with completely normal hearts showed mutated alleles at nine of the genetic variants analysed, and one additional novel mutation was detected by conventional sequencing. Therefore, a genetic mutation associated with HCM may cause sudden cardiac death in the absence of an identifiable phenotype. 相似文献
207.
Using co-citation analysis, the present study attempts to rationalize and organize the combined alliance and innovation literature in order to determine its intellectual structure (i.e. its shared attributes such as models, theories, methods, findings, and implications), as well as to gain a deeper understanding of the most important research trends. More specifically, our goals are: (1) to delineate the intellectual structure of research on alliance and innovation, as represented in the academic literature; (2) to determine the subfields that constitute the intellectual structure and the relationships, if any, between these subfields; (3) to identify contributions that play a pivotal role in bridging two or more conceptual domains of research; and finally, (4) to map the intellectual structure in a two-dimensional space in order to visualize spatial distances between intellectual themes. Implications for future studies are then drawn. 相似文献
208.
209.
Objectives
The aim of this paper is to respond to the commentary of Peter K. Smith, Christina Salmivalli, and Helen Cowie (Journal of Experimental Criminology, 2012), who raise concerns regarding some of the findings of our systematic review and meta-analyses on the effectiveness of bullying prevention programs. They target three findings in particular: (1) the significant association of ??Work with Peers?? with greater victimization; (2) the significant association of ??Disciplinary Methods?? with less bullying perpetration and victimization; and (3) the age variations in effectiveness, suggesting larger effect sizes for older age students.Methods
We provide explicit information and further detailed analyses on the relationship between these features and effect sizes, including heterogeneity tests and results from weighted regression analyses. For one element in particular (work with peers), we present further research findings from evaluations conducted by Smith, Salmivalli, and Cowie (and also findings from other independent researchers) which support our previous findings. New within-program analyses to examine variations in effect sizes with the age of the students are also presented.Results
Evaluations conducted by Smith, Salmivalli and Cowie (and by other independent researchers) indicate the same research conclusions: although peer support schemes appear effective based on attitudinal surveys, these schemes are not related to actual levels of bullying or victimization and, in fact, are quite often related to an increase in bullying and victimization. Our definition of ??disciplinary methods?? did not include the zero-tolerance approach or any type of harsh discipline as suggested in the commentary. In all relevant cases, ??disciplinary methods?? included sanctions within a warm and loving framework, following the Olweus bullying prevention guidelines. While most programs that utilized firm disciplinary methods were inspired by Olweus, the relationship between disciplinary methods and less victimization was not driven by the Olweus program (which was not related to the victimization effect size). Larger effect sizes (i.e. reductions in bullying and victimization) for programs implemented with older students is a robust result also found in a more recent systematic review regarding the effects of anti-bullying programs on bystander intervention. In within-program analyses, most results suggested that effect sizes were greater for younger students, but these results were driven by the less controlled evaluations. The most controlled evaluation (randomized experiment) provided the opposite result.Conclusions
More research is clearly needed on the effectiveness of bullying prevention programs with students of different ages, and we also recommend randomized experiments to assess the importance of different intervention components. 相似文献210.
Flavia Maria de Mattos Donadelli 《Bulletin of Latin American research》2021,40(4):487-500
The Brazilian Higher Education (HE) sector, following a global trend of rapid transformation, has undergone marked changes over the past two decades. These changes have involved the design of quality assurance tools as instruments for regulatory governance. In presenting an overview of the recent history and characteristics of quality assurance in the Brazilian HE sector, this paper contextualises the Brazilian experience according to broader conceptual frameworks and discusses how and why regulatory governance in this sector has so radically changed. 相似文献