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   12642篇
  免费   351篇
各国政治   655篇
工人农民   422篇
世界政治   818篇
外交国际关系   392篇
法律   7962篇
中国共产党   7篇
中国政治   81篇
政治理论   2560篇
综合类   96篇
  2020年   146篇
  2019年   196篇
  2018年   305篇
  2017年   318篇
  2016年   333篇
  2015年   265篇
  2014年   245篇
  2013年   1155篇
  2012年   290篇
  2011年   335篇
  2010年   280篇
  2009年   356篇
  2008年   380篇
  2007年   409篇
  2006年   412篇
  2005年   316篇
  2004年   305篇
  2003年   299篇
  2002年   310篇
  2001年   465篇
  2000年   406篇
  1999年   322篇
  1998年   169篇
  1997年   128篇
  1996年   142篇
  1995年   138篇
  1994年   145篇
  1993年   140篇
  1992年   244篇
  1991年   262篇
  1990年   250篇
  1989年   258篇
  1988年   236篇
  1987年   236篇
  1986年   271篇
  1985年   273篇
  1984年   233篇
  1983年   224篇
  1982年   156篇
  1981年   138篇
  1980年   114篇
  1979年   160篇
  1978年   93篇
  1977年   112篇
  1976年   95篇
  1975年   72篇
  1974年   91篇
  1973年   86篇
  1972年   79篇
  1971年   69篇
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
1.
Critical Criminology - The end of the crack-cocaine crisis and collapse of open-air urban drug markets over the last two decades have reshaped the contours of gang life and gang violence in the...  相似文献   
2.
Natur und Recht - In den Schutzgebieten des europäischen Netzes Natura 2000 (Vogelschutzgebiete und Flora-Fauna-Habitat-(FFH-)Gebiete) sind bestimmte natürliche Lebensräume sowie...  相似文献   
3.
Kümper  Boas 《Natur und Recht》2022,44(2):77-87
Natur und Recht - Planfeststellung und Plangenehmigung sind etablierte Instrumente der Vorhabenzulassung und für den Gewässerausbau bereits seit langem auch im Wasserhaushaltsrecht...  相似文献   
4.

There is strong evidence that chronic, systemic inflammation hastens onset of the diseases of old age that ultimately lead to death. Importantly, several studies suggest that childhood adversity predicts chronic inflammation. Unfortunately, this research has been plagued by retrospective reports of childhood adversity, an absence of controls for adult stressors, and a failure to investigate various competing models of the link between childhood adversity and chronic inflammation. The present study was designed to address these limitations. Using 18 years of data collected from 413 African Americans (58% female) included in the Family and Community Health Study, hierarchical regression analyses provided support for a nuanced early life sensitivity explanation for the link between early adversity and adult chronic inflammation. Controlling for health risk behaviors and adult SES, late childhood (ages 10–12) adversity amplified the association between adult adversity (age 29) and chronic inflammation. This interaction operated in a domain-specific fashion. Harsh parenting amplified the relation between intimate partner hostility and inflammation, whereas early discrimination amplified the relation between adult discrimination and inflammation. These findings suggest that individuals may be primed to respond physiologically to adverse adult circumstances that resemble those experienced earlier in life.

  相似文献   
5.
Journal of Youth and Adolescence - The development of social behavior could be affected by stressful parenting. The mineralocorticoid receptor, one of the two main receptors for the stress hormone...  相似文献   
6.
Journal of Youth and Adolescence - School-based mental health intervention programs have demonstrated efficacy for the prevention and reduction of depressive symptoms, though the effect tends to be...  相似文献   
7.
This paper examines the reliability of Structure from Motion (SfM) photogrammetry as a tool in the capture of forensic footwear marks. This is applicable to photogrammetry freeware DigTrace but is equally relevant to other SfM solutions. SfM simply requires a digital camera, a scale bar, and a selection of oblique photographs of the trace in question taken at the scene. The output is a digital three-dimensional point cloud of the surface and any plastic trace thereon. The first section of this paper examines the reliability of photogrammetry to capture the same data when repeatedly used on one impression, while the second part assesses the impact of varying cameras. Using cloud to cloud comparisons that measure the distance between two-point clouds, we assess the variability between models. The results highlight how little variability is evident and therefore speak to the accuracy and consistency of such techniques in the capture of three-dimensional traces. Using this method, 3D footwear impressions can, in many substrates, be collected with a repeatability of 97% with any variation between models less than ~0.5 mm.  相似文献   
8.
This article is on one of the longest-lived medical institutions of the Ottoman Empire, the Haseki Hospital. I will try to glimpse to the daily workings of the Haseki Hospital and the transformations it underwent in terms of the services it offered, its patients, its social functions, and its relevance for the urban lives of the destitute women of the empire for the period between the 1830s and 1893. During that period, the Haseki Women's Hospital was an institution hosting poor and destitute women as well as pregnant, ill, feeble-minded, convicted women, widows, prostitutes, and orphans. Although it has been called a hospital, it has been used as a women's hospital, lying-in clinic, madness asylum, widow's house, orphanage, and a women's prison. I submit that the Haseki Women's Hospital fulfilled a dual purpose by combining social relief services with medical care for female patients. Besides being a locus of medicine, the hospital was also a site where women in the margins were confined and isolated, but also received care otherwise denied to them. Along these lines, this article searches the vulnerability of the destitute women of nineteenth century Istanbul.  相似文献   
9.
10.
This study describes the performance of handheld Raman devices for determining whether suspect pharmaceutical tablets declared to contain controlled substances were consistent with authentic (CWA) or not consistent with authentic (NCWA) tablets using a simple, rapid, field-friendly method capable of being used by nonexperts. Twenty-five authentic products and 84 known NCWA tablets were examined using three “parent” devices for a total of 327 analyses. On average, the parent devices yielded a true pass rate of 100%, a true fail rate of 98.4%, a false pass rate of 1.6%, and a false fail rate of 0%. The methods/libraries were then transferred to 13 identical “daughter” devices, which were used to examine 10 suspect finished dosage forms in duplicate (six known NCWA tablets and four authentic tablets) for a total of 260 measurements. On average, the daughter devices had a true pass rate of 100%, a true fail rate of 95.5%, a false pass rate of 4.5%, and a false fail rate of 0.0%. These data demonstrate that the parent–daughter electronic transfer method was successful, which permits the ability to develop methods in the laboratory that can be seamlessly pushed out to field devices. The methods can then be used to (i) prioritize samples for additional testing using other more time-consuming laboratory-based techniques needed to detect and quantify active ingredients and (ii) help support the interdiction of dangerous tablets at ports of entry, thereby preventing them from reaching the supply chain.  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