首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   850篇
  免费   50篇
各国政治   79篇
工人农民   68篇
世界政治   79篇
外交国际关系   56篇
法律   412篇
中国共产党   2篇
中国政治   11篇
政治理论   187篇
综合类   6篇
  2023年   14篇
  2022年   11篇
  2021年   10篇
  2020年   30篇
  2019年   39篇
  2018年   57篇
  2017年   50篇
  2016年   47篇
  2015年   33篇
  2014年   29篇
  2013年   135篇
  2012年   41篇
  2011年   36篇
  2010年   39篇
  2009年   34篇
  2008年   22篇
  2007年   33篇
  2006年   34篇
  2005年   38篇
  2004年   20篇
  2003年   26篇
  2002年   21篇
  2001年   14篇
  2000年   8篇
  1999年   7篇
  1998年   4篇
  1997年   2篇
  1996年   3篇
  1995年   4篇
  1994年   6篇
  1993年   8篇
  1992年   4篇
  1991年   2篇
  1990年   8篇
  1989年   3篇
  1988年   2篇
  1987年   5篇
  1985年   3篇
  1984年   4篇
  1983年   5篇
  1982年   2篇
  1981年   1篇
  1980年   1篇
  1979年   2篇
  1978年   1篇
  1977年   1篇
  1976年   1篇
排序方式: 共有900条查询结果,搜索用时 15 毫秒
231.
We compared written text on infant death certificates for deaths coded as sudden infant death syndrome (R95), unknown cause (R99), and accidental suffocation (W75). Using US mortality files supplemented with the death certifiers' written text for all infant deaths with International Classification of Diseases (ICD)-10 assigned codes R95, R99, and W75, we formed cause-of-death subcategories from common themes identified from the written text. Among all infant deaths in 2003-2004, the underlying cause of death was listed as R99 for 2128 deaths, R95 for 4408 deaths, and W75 for 931 deaths. Among the postneonatal deaths, the differences in subcategories varied between assigned ICD-10 codes: for R99-coded deaths, 45.8% were categorized as "Unknown" and 48.6% as "Pending"; for R95-coded deaths, 67.7% were categorized as "sudden infant death syndrome (SIDS)"; and for W75-coded deaths, 76.4% were categorized as "Suffocation." Examination of the written text on the death certificates demonstrates variability in the assigned ICD-10 codes which could have an important effect on the estimates of SIDS cases in the United States.  相似文献   
232.
Identification of route specific marker impurities of (S)-(+)-methamphetamine can provide us with very useful information for (S)-(+)-methamphetamine abuse criminal investigation. (1S,2S)-(+)-Chloropseudoephedrine and (1R,2S)-(-)-chloroephedrine are well known impurities of (S)-(+)-methamphetamine synthesized by metal catalyzed hydrogenation of (1R,2S)-(-)-ephedrine or (1S,2S)-(+)-pseudoephedrine. In this report (1S,2S)-1-methylamino-1-phenyl-2-chloropropane is identified as a route specific marker impurity from metal catalyzed hydrogenation method for the synthesis of (1R,2S)-(-)-ephedrine or (1S,2S)-(+)-pseudoephedrine via its chloro-derivative. (1S,2S)-1-Methylamino-1-phenyl-2-chloropropane is a ring-opening compound of cis-1,2-dimethyl-3-phenylaziridine by reacting with HCl in high temperature condition of GC inlet.  相似文献   
233.
This article examines the effectiveness of diversionary restorative justice (RJ) conferences through the eyes of juvenile offenders. In Australia, Reintegrative Shaming Experiments (RISE) are based on Braithwaite's theory of reintegrative shaming. Previous studies, although showing that RISE reported high levels of victim satisfaction and positive changes in the attitudes of offenders, also demonstrated that it has different outcomes for juvenile offenders depending on the type of offense with which they were charged. However, the effectiveness of RISE in terms of the offenders' perceptions has not been addressed, and the impact of the offenders' perceptions about RISE still remains under investigation. Using Australian data from RISE between 1995 and 1999, this article examines juvenile offenders' perceptions on preventing reoffending, repaying the victim and society, and the degree of repentance. The data were taken from interviews with juvenile offenders to measure their perceptions after the court or RISE processing. A comparison of standard court processing effects and RISE on juvenile offending, including property crime, shoplifting, and violent offenses, was undertaken. The results from this study were somewhat inconsistent with previous research. In this study, there was no significant relationship between RJ conference and the offenders' own perceptions on the prevention of future offending. However, it was found that there were treatment effects on repaying the victim, repaying society, and the degree of feeling repentance, and that younger offenders wanted to repay the victim/society and feel repentance.  相似文献   
234.
235.
236.
Are public and private organizations fundamentally different? This question has been among the most enduring inquiries in public administration. Our study explores the impact of organizational ownership on two complementary aspects of performance: service quality and access to services for impoverished clients. Derived from public management research on performance determinants and nursing home care literature, our hypotheses stipulate that public, nonprofit, and forprofit nursing homes use different approaches to balance the strategic tradeoff between two aspects of performance. Panel data on 14,423 facilities were analyzed to compare measures of quality and access across three sectors using different estimation methods. Findings indicate that ownership status is associated with critical differences in both quality and access. Public and nonprofit organizations are similar in terms of quality, and both perform significantly better than their forprofit counterparts. When compared to nonprofit and, in some cases, for‐profit facilities, public nursing homes have a significantly higher share of Medicaid recipients. The paper proposes strategies to address the identified long‐term care divide. © 2008 by the Association for Public Policy Analysis and Management.  相似文献   
237.
ABSTRACT

This article examines the growing insecurity for the Korean self-employed who were once responsible for a large proportion of domestic service operations. Since the 1980s, changing regional and domestic economic circumstances, the restructuring of regional and chaebol manufacturing operations and liberalisation of the domestic service economy had led to enterprise diversification into the distributive sectors and the systematisation of the domestic service economy. Conducting a historical analysis of service sector development and decomposing the Korean Economically Active Population survey (1989–2011), this article charts the process of Korea’s distributive sector development and its effect on the self-employed. It argues that chaebol systematisation of Korea’s service sector consolidated the domestic economy after 1997 and exerted pressure on the country’s self-employed. Large businesses formalised the service sector, displaced the self-employed, and instead generated mostly non-regular wage work, proletarianising a significant segment of the service workforce.  相似文献   
238.
A subcategory of elder maltreatment is the fatal outcome, or elder homicide. Some cases of elder homicide result from chronic abuse and/or neglect, while others appear to be sudden, with no pertinent history. The research and literature of elder homicide are lacking, making the investigation of each case difficult; the typical victim, perpetrator, scenario, and cause of death are not known. Components of homicide such as sexual assault and toxicology also lack study. We analyzed all elder deaths over a 20-year period. Cases included those with victims greater than or equal to 65 years of age. These deaths totaled 2137: natural = 1506, accident = 344, suicide = 139, homicide = 127, and undetermined = 21. Focusing on homicides, variables analyzed were age, race, gender, cause of death, location of death, time of year, motive, perpetrator, toxicology, and sexual assault component. By identifying the typical victim, perpetrator, scenario, and autopsy findings, these cases can be more completely investigated and possibly prevented.  相似文献   
239.
d-3-Methoxy-17-methylmorphinan (Dextromethorphan, DXM), which is a structural analog of morphine and codeine, has been widely used as a non-narcotic antitussive agent. It is a safe drug in therapeutic dose and does not produce analgesic effects, while its enantiomer, l-3-methoxy-17-methylmorphinan called levomethorphan (LXM) is a potent narcotic analgesic. DXM has been widely abused in Korea due to its hallucinogenic effect in large doses; therefore, the health authorities have regulated its use as a psychotropic agent since 2003. As its abuse has been serious, a possibility that DXM would be smuggled into Korea has also increased. Moreover, it has been suspected that there was the possibility of the adulteration or substitution of DXM with LXM due to their chemical similarities. Therefore, it was necessary for us to establish the enantiomeric separation of DXM and LXM. In this study, a liquid chromatographic method using a chiral column capable of separating stereoisomers of DXM as well as analyzing the major metabolites of DXM, 3-methoxymorphinan, 3-hydroxymorphinan, and 17-hydroxymethylmorphinan was developed. The validation of a method was studied through repeatability of retention times. Using this method, 32 confiscated DXM samples were analyzed to identify the enantiomers of DXM. As a result, DXM was detected in all samples and there was no evidence of the adulteration or substitution of DXM with LXM. Nevertheless, the stereochemical analysis of DXM and LXM is important not only to identify starting materials for illegal drug manufacture but also to understand the trends of abused drugs.  相似文献   
240.
This study evaluated (i) frequencies of aggression in maritally distressed problem drinking (DP) women relative to controls, (ii) aggression, marital satisfaction, and partner drinking in predicting female drinking, and (iii) discrepant within-couple drinking in predicting marital distress. The sample included 27 DP women, 24 maritally distressed nonproblem drinking women (DNP women), and 24 women with neither problem (NDNP women). DP women reported frequencies of physical aggression similar to DNP women, but less male verbal aggression than DNP women. Predictors of female drinking were marital satisfaction and male drinking, but aggression did not predict female drinking. Female marital satisfaction was predicted by interspousal discrepancies in drinking after accounting for verbal aggression.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号