全文获取类型
收费全文 | 9187篇 |
免费 | 71篇 |
专业分类
各国政治 | 253篇 |
工人农民 | 1095篇 |
世界政治 | 274篇 |
外交国际关系 | 407篇 |
法律 | 5066篇 |
中国政治 | 4篇 |
政治理论 | 2150篇 |
综合类 | 9篇 |
出版年
2023年 | 10篇 |
2021年 | 6篇 |
2020年 | 28篇 |
2019年 | 35篇 |
2018年 | 1299篇 |
2017年 | 1241篇 |
2016年 | 1067篇 |
2015年 | 94篇 |
2014年 | 52篇 |
2013年 | 161篇 |
2012年 | 216篇 |
2011年 | 960篇 |
2010年 | 1039篇 |
2009年 | 610篇 |
2008年 | 764篇 |
2007年 | 705篇 |
2006年 | 36篇 |
2005年 | 97篇 |
2004年 | 207篇 |
2003年 | 175篇 |
2002年 | 53篇 |
2001年 | 18篇 |
2000年 | 30篇 |
1999年 | 17篇 |
1998年 | 26篇 |
1997年 | 26篇 |
1996年 | 30篇 |
1995年 | 37篇 |
1994年 | 29篇 |
1993年 | 17篇 |
1992年 | 8篇 |
1991年 | 14篇 |
1990年 | 14篇 |
1989年 | 10篇 |
1988年 | 6篇 |
1987年 | 8篇 |
1985年 | 11篇 |
1984年 | 14篇 |
1983年 | 15篇 |
1982年 | 11篇 |
1981年 | 3篇 |
1980年 | 5篇 |
1979年 | 8篇 |
1978年 | 11篇 |
1977年 | 13篇 |
1976年 | 2篇 |
1975年 | 5篇 |
1974年 | 4篇 |
1972年 | 3篇 |
1970年 | 2篇 |
排序方式: 共有9258条查询结果,搜索用时 15 毫秒
891.
892.
Matthew DeMichele Nathan C. Lowe Brian K. Payne 《American Journal of Criminal Justice》2014,39(2):292-314
The purpose of this paper is to use criminological theories to explain chronic drunk driving. There is little criminological research explaining recidivist drunk driving with criminological theories. Instead, most researchers posit that repeat drunk driving is explained as a byproduct of substance abuse. Although substance abuse is likely correlated to chronic drunk driving, theoretical explanations need to go further to understand a broader set of social and psychological predictors. Factor analysis and linear regression techniques are used to estimate the relationship between items from two assessment instruments with a number of drunken driving offenses. The sample consists of nearly 3,500 individuals on probation and parole in a Southwestern state. The findings support our contention that criminological frameworks are helpful to understand chronic DUI. We found significant results for volatility, antisocial friends, teenage deviance, and negative views of the law, while controlling for age, gender, marital status, and race. DUIs are a serious problem for the criminal justice system and understanding the individual level correlates of repetitive DUI is crucial for policy development. Further, chronic DUI offers criminologists an opportunity to determine the ability of criminological theories to explain this type of behavior. 相似文献
893.
894.
895.
Jessica Skinner PhD Natalie Langley PhD Malin Joseph MS James Herrick MSA Robert Brown BS Brian Waletzki BS Peter Goguen Dipl T Loukham Shyamsunder PhD Subramaniam Rajan PhD 《Journal of forensic sciences》2023,68(3):757-767
Forensic fractographic features of bone reliably establish crack propagation in perimortem injuries. We investigated if similar fracture surface features characterize postmortem fractures. Experimentally induced peri- and postmortem fractures were used to assess if fractographic features vary as bone elasticity decreases during the postmortem interval (PMI). Thirty-seven unembalmed, defleshed human femoral shafts from males and females aged 33–81 years were fractured at varying PMIs with a drop test frame using a three-point bending setup and recorded with a high-speed camera. Vital statistics, cause of death, PMI length, temperature, humidity, collagen percentage, water loss, fracture energy, and fractography scores were recorded for each sample. Results showed that fractographic features associated with perimortem fractures were expressed in PMIs up to 40,600 accumulated degree hours (ADH), or 60 warm weather days. Hackle was the most consistently expressed feature, occurring in all fractures regardless of ADH. The most variable characteristics were wake features (78.4%) and arrest ridges (70.3%). Collagen percentage did not correlate strongly with ADH (r = −0.04, p = 0.81); however, there was a strong significant correlation between ADH and water loss (r = 0.74, p < 0.001). Multinomial logistic regression showed no association between fractographic feature expression and ADH or collagen percentage. In conclusion, forensic fractographic features reliably determine initiation and directionality of crack propagation in experimentally induced PMIs up to 40,600 ADH, demonstrating the utility of this method into the recent postmortem interval. This expression of reliable fractographic features throughout the early PMI intimates these characteristics may not be useful standalone features for discerning peri- versus postmortem fractures. 相似文献
896.
897.
Brian J. Gaines Mark Goodwin Stephen Holden Bates Gisela Sin 《The Journal of Legislative Studies》2019,25(3):331-339
ABSTRACTProving that legislative committees really matter is not simple. The assembled papers aim to demonstrate fruitful paths to analysing when committees influence policy, what they can and should do, and how to detect their importance to the political process. 相似文献
898.
AbstractThis article discusses what it means to “contribute” to waste disposal as that term is used in section 7002 of the Resource Conservation and Recovery Act. More specifically, the article examines whether the US Forest Service can violate section 7002 by not regulating hunting. Among the issues addressed are whether one can contribute to waste disposal passively, whether one can contribute to waste disposal without taking any action that addresses waste disposal and the extent to which the statutory term “contribute” is analogous to the common law concept of causation. 相似文献
899.
900.
We distinguish between (i) voting systems in which voters can rank candidates and (ii) those in which they can grade candidates, using two or more grades. In approval voting, voters can assign two grades only—approve (1) or not approve (0)—to candidates. While two grades rule out a discrepancy between the average-grade winners, who receive the highest average grade, and the superior-grade winners, who receive more superior grades in pairwise comparisons (akin to Condorcet winners), more than two grades allow it. We call this discrepancy between the two kinds of winners the paradox of grading systems, which we illustrate with several examples and whose probability we estimate for sincere and strategic voters through a Monte Carlo simulation. We discuss the tradeoff between (i) allowing more than two grades, but risking the paradox, and (ii) precluding the paradox, but restricting voters to two grades. 相似文献