全文获取类型
收费全文 | 7170篇 |
免费 | 225篇 |
专业分类
各国政治 | 458篇 |
工人农民 | 193篇 |
世界政治 | 597篇 |
外交国际关系 | 373篇 |
法律 | 3901篇 |
中国共产党 | 1篇 |
中国政治 | 58篇 |
政治理论 | 1764篇 |
综合类 | 50篇 |
出版年
2021年 | 60篇 |
2020年 | 109篇 |
2019年 | 111篇 |
2018年 | 172篇 |
2017年 | 206篇 |
2016年 | 199篇 |
2015年 | 144篇 |
2014年 | 168篇 |
2013年 | 875篇 |
2012年 | 172篇 |
2011年 | 212篇 |
2010年 | 166篇 |
2009年 | 209篇 |
2008年 | 260篇 |
2007年 | 224篇 |
2006年 | 204篇 |
2005年 | 196篇 |
2004年 | 204篇 |
2003年 | 181篇 |
2002年 | 185篇 |
2001年 | 256篇 |
2000年 | 197篇 |
1999年 | 172篇 |
1998年 | 99篇 |
1997年 | 101篇 |
1996年 | 81篇 |
1995年 | 105篇 |
1994年 | 91篇 |
1993年 | 97篇 |
1992年 | 110篇 |
1991年 | 135篇 |
1990年 | 103篇 |
1989年 | 104篇 |
1988年 | 116篇 |
1987年 | 117篇 |
1986年 | 143篇 |
1985年 | 122篇 |
1984年 | 111篇 |
1983年 | 110篇 |
1982年 | 67篇 |
1981年 | 54篇 |
1980年 | 47篇 |
1979年 | 51篇 |
1978年 | 54篇 |
1977年 | 40篇 |
1976年 | 33篇 |
1975年 | 38篇 |
1974年 | 63篇 |
1971年 | 36篇 |
1968年 | 34篇 |
排序方式: 共有7395条查询结果,搜索用时 15 毫秒
991.
Peter H. Rossi Richard A. Berk Alec Campbell 《Journal of Quantitative Criminology》1997,13(3):267-290
The federal sentencing guidelines prescribe ranges of sentences to be given to persons convicted of felonies in the federal criminal courts. The U.S. Sentencing Commission wrote the guidelines attempting to make sentences conform to community views of appropriate punishments, along with several other criteria. Employing data from a 1994 national sample of adult Americans, designed as a factorial survey, the degree of correspondence is shown between guidelines sentences and those desired by the American public. Although at the individual level only a modest degree of concordance was found, the central tendencies of public opinion (median sentences) were found to correspond quite closely to the guidelines sentences. The major points of disagreement centered around drug trafficking crimes: the guidelines prescribed very long sentences for those crimes and distinguished sharply among trafficking in heroin, powder cocaine, and crack, whereas median sentences desired by the public were much lower and did not distinguish sharply among trafficking in those drugs. We interpret the findings as indicating that the guidelines sentences conform reasonably closely to American normative consensus concerning the sentencing of federal felons.The research reported in this article was commissioned by the U.S. Sentencing Commission. The views expressed in this article are not necessarily endorsed by the Commission. Full expositions of the findings from the national survey used are given by Rossi and Berk (1995, 1997). 相似文献
992.
993.
Peter B. Hoffman 《Journal of criminal justice》1984,12(6):617-623
Empirical studies frequently have reported an association between age at release from prison and recidivism. For criminal justice decision-makers who wish to consider this knowledge in making prosecutorial, sentencing, or parole decisions, the magnitude of that association must be established while controlling for the effects of other variables known to be associated with recidivism (e.g., prior criminal record). This research addresses this issue using data from a large sample of federal prison releasees. The results indicate that recidivism rates do decline with increased age, and that the association is not diminished when statistical control is exercised for the effect of prior criminal record. 相似文献
994.
995.
In October 1973, the United States Board of Parole adopted an actuarial device, termed a “salient factor score”, as a risk assesment aid. This device was constructed and initially validated on a sample of 1970 releases utilizing a two year follow-up period for each case. However, as the utility of a predictive device depends upon its a ability to predict to prospective samples, periodic validation is required. This paper describes the application of the salient factor score to a subsequent validation sample of prisoners released during 1972 and discusses the effects of using various outcome measures. 相似文献
996.
Biochemical characterization in alveolar lavage fluids of rats which had inhaled 5% oxygen, carbon dioxide and carbon monoxide was studied in comparison with control rats. The protein content, consisting mainly of serum albumin, markedly increased in the hypoxic states. The phospholipid content also increased one and a half to two times as much as in the control rats. The phospholipids which increased in the alveoli were mainly pulmonary surfactant phospholipids, i.e. phosphatidylcholine and phosphatidylglycerol. The phospholipid profiles did not appear to be affected by the leakage of plasma lipids. These findings indicate that pulmonary surfactant phospholipids accumulate in the alveoli of rats in the hypoxic states examined here. 相似文献
997.
998.
999.
The acetaldehyde accumulation in blood during the equilibration time of samples processed by gas-liquid chromatographic headspace technique is reported. The quantitative loss of blood ethanol concentration is recorded at various temperatures and times of the preheating process.When the equilibration process is performed at 40 °C, minimal errors, due to ethanol oxidation, are observed. 相似文献
1000.