全文获取类型
收费全文 | 8324篇 |
免费 | 12篇 |
专业分类
各国政治 | 213篇 |
工人农民 | 1073篇 |
世界政治 | 183篇 |
外交国际关系 | 288篇 |
法律 | 4723篇 |
中国共产党 | 1篇 |
政治理论 | 1854篇 |
综合类 | 1篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2021年 | 3篇 |
2020年 | 6篇 |
2019年 | 9篇 |
2018年 | 1272篇 |
2017年 | 1204篇 |
2016年 | 1018篇 |
2015年 | 63篇 |
2014年 | 19篇 |
2013年 | 39篇 |
2012年 | 187篇 |
2011年 | 916篇 |
2010年 | 1016篇 |
2009年 | 584篇 |
2008年 | 730篇 |
2007年 | 690篇 |
2006年 | 8篇 |
2005年 | 65篇 |
2004年 | 170篇 |
2003年 | 140篇 |
2002年 | 29篇 |
2001年 | 3篇 |
2000年 | 7篇 |
1999年 | 1篇 |
1998年 | 11篇 |
1997年 | 11篇 |
1996年 | 20篇 |
1995年 | 30篇 |
1994年 | 23篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 3篇 |
1990年 | 4篇 |
1989年 | 2篇 |
1985年 | 1篇 |
1984年 | 9篇 |
1983年 | 9篇 |
1982年 | 6篇 |
1981年 | 1篇 |
1979年 | 5篇 |
1978年 | 7篇 |
1977年 | 9篇 |
1966年 | 1篇 |
1965年 | 1篇 |
排序方式: 共有8336条查询结果,搜索用时 15 毫秒
991.
Anthony A. Braga Andrew V. Papachristos David M. Hureau 《Journal of Quantitative Criminology》2010,26(1):33-53
Boston, like many other major U.S. cities, experienced an epidemic of gun violence during the late 1980s and early 1990s that
was followed by a sudden large downturn in gun violence in the mid 1990s. The gun violence drop continued until the early
part of the new millennium. Recent advances in criminological research suggest that there is significant clustering of crime
in micro places, or “hot spots,” that generate a disproportionate amount of criminal events in a city. In this paper, we use
growth curve regression models to uncover distinctive developmental trends in gun assault incidents at street segments and
intersections in Boston over a 29-year period. We find that Boston gun violence is intensely concentrated at a small number
of street segments and intersections rather than spread evenly across the urban landscape between 1980 and 2008. Gun violence
trends at these high-activity micro places follow two general trajectories: stable concentrations of gun assaults incidents
over time and volatile concentrations of gun assault incidents over time. Micro places with volatile trajectories represent
less than 3% of street segments and intersections, generate more than half of all gun violence incidents, and seem to be the
primary drivers of overall gun violence trends in Boston. Our findings suggest that the urban gun violence epidemic, and sudden
downturn in urban gun violence in the late 1990s, may be best understood by examining highly volatile micro-level trends at
a relatively small number of places in urban environments. 相似文献
992.
David F. Greenberg 《Journal of Quantitative Criminology》2010,26(4):437-443
993.
Min Xie 《Journal of Quantitative Criminology》2010,26(2):237-268
Past research examining the association between residential segregation and homicide victimization has often considered only
one dimension of segregation, and the literature that does use a multidimensional approach has not presented a uniform set
of findings. The majority of the studies have focused on the experiences of Blacks, while overlooking the possibility that
the differences between the structure of Black and Hispanic communities may alter the conclusions for Hispanics. In this study,
we argue that in order to understand the mechanisms underlying the effects of segregation on homicide, we need to understand
the multidimensional structure of Black and Hispanic segregation, and examine whether the relationship between segregation
and homicide differs for Blacks and Hispanics. Using 2000 census data and homicide data from the National Vital Statistics
System (1999–2001) for U.S. metropolitan areas, we identify two empirically distinct superdimensions of segregation (group
separateness and centralized concentration), both of which have a substantial positive and statistically significant impact
on homicide victimization for both Blacks and Hispanics. 相似文献
994.
Marieke Van de Rakt Stijn Ruiter Nan Dirk De Graaf Paul Nieuwbeerta 《Journal of Quantitative Criminology》2010,26(3):371-389
Criminal behavior of parents substantially affects the criminal behavior of children. Little is known, however, about how
crime is transmitted from one generation to the next. In order to test two possible explanations against each other, we pose
the question whether the timing of the criminal acts of fathers is important for children’s chances of committing crime. Static
theories predict that it is the number of delinquent acts performed by fathers that is important, and that the particular
timing does not affect the child’s chance of committing crime. Dynamic theories state that the timing is important, and children
have a greater chance of committing crime in the period after fathers have committed delinquent acts. Results show that the
total number of convictions of a father is indeed very important, but also the exact timing is key to understanding intergenerational
transmission of crime. In the year a father is convicted the chance his child is also convicted increases substantially and
it decays in subsequent years. This decay takes longer the more crimes father has committed. Our results show that some of
the assumptions of the static theories at least need to be adjusted. 相似文献
995.
996.
This study explores the existence and predictive ability of a behavior-based typology of men who were adjudicated for a domestic
violence crime in an urban criminal justice system. Data from 671 men who completed a 2-hour biopsychosocial assessment were
analyzed using cluster analysis. Findings indicate a typology of low level criminality (25.6%), dysphoric volatile behavior
(42.2%), and dysphoric general violence (32.2%) similar to previous typologies, but with some unique characteristics. The
behavior-based typology predicted both program completion and subsequent rearrest. This study provides preliminary support
for the development of typological assessment in criminal justice and BIP settings for early identification of men who may
need additional interventions. 相似文献
997.
998.
Mirjam Knockaert Mike Wright Bart Clarysse Andy Lockett 《The Journal of Technology Transfer》2010,35(6):567-584
Our research seeks to develop understanding of the factors explaining venture capital investment managers’ attitudes towards
investment in the unique context of academic spin-outs. We provide a novel integration of both VC fund characteristics and
investment managers’ human capital characteristics with a unique hand-collected dataset of 68 early stage VC investment managers
in Europe. Attitudes toward academic spin-out investing are positively affected by the presence of public sector capital and
by investment managers who are more intensively involved with the entrepreneur. Specific human capital in investment managers
who had worked in an academic environment is more likely associated with investment in academic spin-outs. In terms of general
human capital, financial experience is positively related while entrepreneurial experience is negatively associated with investment
attitude towards academic spin-outs. There may be a need to facilitate the attraction of people from industry and investment
banking into public VC funds in particular. 相似文献
999.
The Revised Conflict Tactics Scales (CTS2) is currently the most widely used measure for identifying cases of intimate partner
violence within the hearing population. The CTS2 has been used successfully with individuals from various countries and cultural
backgrounds. However, the CTS2 had not yet been used with Deaf individuals. The goal of the present study was to investigate
the internal consistency reliability and the factor structure of the CTS2 within a sample of Deaf female college students.
Psychometric analyses indicated that subscales measuring Victimization of Negotiation, Psychological Aggression, Physical
Assault, and Injury proved both reliable and valid in the current sample. Three subscales did not evidence reliability and
the factor structure was not valid for Perpetration items. 相似文献
1000.
Richard E. Mattson Timothy J. O’Farrell Candice M. Monson Jillian Panuzio Casey T. Taft 《Journal of family violence》2010,25(1):33-42
This study examined whether female-to-male (FTM) psychological aggression predicted men’s relapse of substance use disorder
(SUD) 6 months following substance use treatment. Men diagnosed with either a substance abuse or dependence disorder who had
recently begun an SUD treatment program participated in the study with their female relationship partners (N = 173). Logistic regression was used to examine the relationship between baseline FTM psychological aggression and SUD relapse
when controlling for baseline demographic, dyadic, substance abuse- and treatment-related variables, as well as frequencies
of other male- and female-perpetrated aggressive dyadic behaviors. Higher frequencies of severe, but not minor, forms of FTM
psychological aggression uniquely predicted an increased risk of relapse at 6 months follow-up. These data add to the developing
research program highlighting the negative sequelae of female-perpetrated psychological aggression and also provide an empirical
basis for targeting specific dyadic behaviors in the context of SUD treatment and relapse prevention. 相似文献