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   9207篇
  免费   46篇
各国政治   251篇
工人农民   1095篇
世界政治   279篇
外交国际关系   334篇
法律   5154篇
中国共产党   2篇
中国政治   11篇
政治理论   2089篇
综合类   38篇
  2023年   11篇
  2022年   10篇
  2021年   10篇
  2020年   28篇
  2019年   30篇
  2018年   1303篇
  2017年   1226篇
  2016年   1047篇
  2015年   91篇
  2014年   48篇
  2013年   135篇
  2012年   233篇
  2011年   947篇
  2010年   1051篇
  2009年   614篇
  2008年   779篇
  2007年   721篇
  2006年   52篇
  2005年   120篇
  2004年   216篇
  2003年   186篇
  2002年   68篇
  2001年   29篇
  2000年   31篇
  1999年   14篇
  1998年   26篇
  1997年   17篇
  1996年   26篇
  1995年   38篇
  1994年   26篇
  1993年   4篇
  1992年   4篇
  1991年   4篇
  1990年   5篇
  1989年   7篇
  1988年   7篇
  1987年   2篇
  1986年   9篇
  1985年   2篇
  1984年   14篇
  1983年   14篇
  1982年   8篇
  1979年   6篇
  1978年   9篇
  1977年   10篇
  1976年   2篇
  1974年   4篇
  1972年   2篇
  1967年   3篇
  1963年   1篇
排序方式: 共有9253条查询结果,搜索用时 9 毫秒
901.
902.
Little research has investigated the prevalence of mood disturbance among sex offenders despite the fact that psychological distress may bear some relationship to community reintegration, and ultimately, recidivism. All offenders on New Jersey’s sex offender Internet registry were mailed surveys about their experiences with, and perceptions of, notification and residence restriction statutes, the Beck Depression Inventory-II (BDI-II), and the Beck Hopelessness Scale (BHS). On average, respondents (N = 104) reported mild to moderate levels of depressive symptoms (M BDI = 17.1) and hopelessness (M BHS = 6.9). Additionally, offenders who reported being negatively affected by residence restrictions and notification statutes reported higher levels of both depression and hopelessness. Given evidence that sex offender specific legislation may de-stabilize offenders, this research highlights the importance of managing affective states in this population.  相似文献   
903.
904.
Presidential candidates regularly use crime issues to help win electoral support. Contrary to conventional wisdom, crime control became an issue in the 2008 presidential campaign. Despite decreasing crime rates and public opinion focused only temporarily on illegal immigration, the three major presidential candidates (Obama, Clinton, & McCain) discussed many anticrime initiatives during the campaign. Unlike past research which has found presidential candidates use primarily symbolic rhetoric in their anticrime rhetoric, all three presidential candidates in the 2008 presidential election were found to have employed tangible statements. The article discusses the different findings, making recommendations for future research.  相似文献   
905.
906.
The publication deals with topics concerning the interpretation of the Vigrahavyāvartanī in as much as they are relevant for the understanding of (early) Madhyamaka-philosophy in general. A major part of the article is dedicated to a critical assessment of a number of views which have been propagated recently in a paper by Sharma (In: Nagoya studies in Indian culture and Buddhism, Saṃbhāṣā, 2011). A primary goal of the present investigation consists in substantiating the claim that early Madhyamaka represents a metaphysical teaching which stands in sharp contrast not only to stances of common sense but also to tenets propagated in Buddhist dogmatics.  相似文献   
907.
For the first time in Europe hair and urine testing have been applied to assess drugs of abuse consumption in couples undergoing assisted reproductive technology and the eventual association of toxic habits with other lifestyle, health status and sociodemographic factors was also investigated. Couples attending five assisted reproduction centers in Rome were invited to join the study. When they presented at the Centre for the visit, they were asked to answer a structured questionnaire concerning sociodemographic characteristics and lifestyle habits, and at the same time to provide hair and urine samples. Hair and urine testing for drugs of abuse, urinary profile of principal endogenous steroids involved in fertility process (testosterone, epitestosterone, androsterone, etiocholanolone and dehydroepiandrosterone) and of alcohol and tobacco smoke biomarkers were performed with validated methodologies. Of the 594 enrolled individuals (297 couples), 352 (164 couples and 24 single individuals from the couple) completed the questionnaire and gave both hair and urine samples, apart from 3 bald men, who only gave urine samples. Urine testing showed an overall 4.8% (17 individuals) positivity to drugs of abuse: 4.2% to cannabinoids, 1.4% to cocaine and 0.85% to both drugs. Results of 4cm segment hair samples testing matched those from urine samples. Thus, taking together, results of urine and hair testing confirmed repeated use of cannabis, cocaine and both drugs in 3.7, 0.85 and 0.57% examined individuals, respectively. Drug consumers were in a statistically higher percentage active smokers and alcohol drinkers, less prone to physical activity and with a trend towards higher weight than non consumers. Finally, repeated drug consumption was associated with significant lower concentration of urinary testosterone in males and of urinary dehydroepiandrosterone in females. The findings of the present study confirm the suitability of urine testing to disclose recent drugs of abuse consumption and of hair analysis to verify repeated consumption. Association between different toxic habits and sedentary lifestyle is also substantiated by the obtained results in our cohort of couples attending assisted reproduction centers.  相似文献   
908.
The aim of this cross-sectional study was to test the accuracy of Cameriere's European formula for age assessment in a large sample of Mexican children. The accuracy of dental age estimation was defined as how closely real age, measured as the difference between chronological age (CA) and dental age (DA), could be predicted. Digitalized orthopantomographs of 502 Mexican children (254 girls and 248 boys), aged between 5 and 15 years, were analyzed. The seven left permanent mandibular teeth were evaluated using Cameriere's method. Intra- and inter-observer variability for this technique was tested on a small random sample. Dental age was estimated for each individual and compared with known chronological age. Accuracy was measured as the difference between known chronological age and dental age and tested for significance with the mean prediction error (ME). The standard deviation and 95% confidence interval of the mean difference were also calculated. ME was 0.63 years for girls and 0.52 years for boys. ME was found to be slightly overestimated by 0.10 years for girls, but was correctly estimated for boys with an accuracy of 0.00. In conclusion, this method is very useful and may be recommended for practical application both in clinical dentistry and forensic procedures on the Mexican population.  相似文献   
909.
This paper focuses on a little discussed part of Chilean history and the efforts to resolve Human Rights cases from the period 1973 to 1990. A case file is presented to illustrate the different stages, problems and solutions found in one particularly challenging case studied by the Special Unit of Identification of Detained and Missing (UEIDDDD) of the Human Rights Program of the Forensic Service, Chile, during the period 2006-2009. A major complication found in this example was the fact that the remains studied were commingled, and in addition, were mixed with remains that were not of medico-legal interest - deposited prior to and after the case in question, but within the same common grave. Multiple burials and the consequences of commingled skeletal human remains are reviewed, paying special attention to the roles that different agents related to these types of cases play, how they influence the decision making process and the outcomes that can be expected in commingled cases due to the complexities and challenges they present. Effective communication between prosecutors and forensic practitioners is vital to optimize the resources. Equally important is the relationship that is built between the practitioners and the victims' families regarding communication, information and expectations that both parties may have.  相似文献   
910.
In prosecution, Belgian judiciary currently uses outdated yield figures (28.1g per plant, sold at € 3/g at grower level) for fining illicit indoor cannabis plantations. Using state-of-the-art cultivation techniques, our growth experiments showed that yield is better expressed in g/m(2) cultivated surface area rather than in g per plant, and that yield varies significantly between different cannabis strains. It was found that the lower-bound of the one-sided 95% confidence interval of the yield of an indoor cannabis plantation can be set at 575 g/m(2). Prices and pricing mechanisms were investigated using interviews with respondents selected through snowball sampling. Results reveal that (i) the Belgian cannabis market chain is highly complex; (ii) unit prices are predominantly determined by transaction sizes; but also (iii) a set of product- and socially-related price-fixing mechanisms have an equally important role. At grower level, respondents reported prices for 1 g of dry cannabis buds to range € 3.00-4.25.  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