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   2189篇
  免费   44篇
各国政治   126篇
工人农民   47篇
世界政治   137篇
外交国际关系   96篇
法律   1426篇
中国共产党   2篇
中国政治   18篇
政治理论   341篇
综合类   40篇
  2023年   13篇
  2022年   8篇
  2021年   9篇
  2020年   32篇
  2019年   32篇
  2018年   42篇
  2017年   31篇
  2016年   47篇
  2015年   83篇
  2014年   85篇
  2013年   363篇
  2012年   111篇
  2011年   96篇
  2010年   114篇
  2009年   114篇
  2008年   97篇
  2007年   94篇
  2006年   97篇
  2005年   111篇
  2004年   84篇
  2003年   44篇
  2002年   61篇
  2001年   114篇
  2000年   40篇
  1999年   16篇
  1998年   20篇
  1997年   10篇
  1996年   15篇
  1995年   16篇
  1994年   13篇
  1993年   7篇
  1992年   12篇
  1991年   10篇
  1990年   8篇
  1989年   21篇
  1988年   13篇
  1987年   12篇
  1986年   23篇
  1985年   10篇
  1984年   11篇
  1983年   9篇
  1982年   15篇
  1981年   8篇
  1980年   10篇
  1979年   8篇
  1978年   9篇
  1977年   8篇
  1975年   4篇
  1974年   6篇
  1967年   6篇
排序方式: 共有2233条查询结果,搜索用时 15 毫秒
931.
Problems of research in technological innovation are often based on limited perspectives, e.g., studies with only a macro or micro focus. This paper discusses the limitations of such approaches, and then develops a multilevel, multiphase framework for such research by utilizing five hierarchical levels: Government, industry, organization, subunit and individual. Using this hierarchical framework the nature of the innovation process is explored under various contextual conditions. The management problems of interlevel integration and goal conflict are given special consideration.  相似文献   
932.
933.
934.
Understanding critical motivational processes of sexual offenders may ultimately provide important clues to more effective treatments. Implicit, automatic cognitive processes have received minimal attention; however, a lexical decision experiment revealed automatic links between the concepts of power and sex among participants who self-reported attraction to sexual aggression. The current study replicates this experiment with a group of male child molesters and forensic and analogue controls. Subliminally presented sex words elicited a facilitation effect for power words among child molesters only; that is, sex to power associations were evident, as well as a trend for the reverse. These results provide preliminary evidence for an automatic sex-power association in child molesters and may point to a crucial pathological link in the cognitive schemata of sex offenders. As well, the current study suggests that paradigms from cognitive psychology may contribute to multimodal (risk) assessment of sexual offenders.  相似文献   
935.
Allele frequencies for 11 STR autosomal loci (F13A01, F13B, FESFPS, LPL, CSF1PO, TH01, TPOX, VWA, D16S539, D7S820 and D13S317) were obtained from a sample of 200 unrelated individuals from Costa Rica, Central America.  相似文献   
936.
937.
A large-scale study of facial soft tissue depths of Caucasian adults was conducted. Over a 2-years period, 967 Caucasian subjects of both sexes, varying age and varying body mass index (BMI) were studied. A user-friendly and mobile ultrasound-based system was used to measure, in about 20min per subject, the soft tissue thickness at 52 facial landmarks including most of the landmarks used in previous studies. This system was previously validated on repeatability and accuracy [S. De Greef, P. Claes, W. Mollemans, M. Loubele, D. Vandermeulen, P. Suetens, G. Willems, Semi-automated ultrasound facial soft tissue depth registration: method and validation. J. Forensic Sci. 50 (2005)]. The data of 510 women and 457 men were analyzed in order to update facial soft tissue depth charts of the contemporary Caucasian adult. Tables with the average thickness values for each landmark as well as the standard deviation and range, tabulated according to gender, age and BMI are reported. In addition, for each landmark and for both sexes separately, a multiple linear regression of thickness versus age and BMI is calculated. The lateral asymmetry of the face was analysed on an initial subset of 588 subjects showing negligible differences and thus warranting the unilateral measurements of the remaining subjects. The new dataset was statistically compared to three datasets for the Caucasian adults: the traditional datasets of Rhine and Moore [J.S. Rhine, C.E. Moore, Tables of facial tissue thickness of American Caucasoids in forensic anthropology. Maxwell Museum Technical series 1 (1984)] and Helmer [R. Helmer, Sch?delidentifizierung durch elektronische bildmischung, Kriminalistik Verlag GmbH, Heidelberg, 1984] together with the most recent in vivo study by Manhein et al. [M.H. Manhein, G.A. Listi, R.E. Barsley, R. Musselman, N.E. Barrow, D.H. Ubelbaker, In vivo facial tissue depth measurements for children and adults. J. Forensic Sci. 45 (2000) 48-60]. The large-scale database presented in this paper offers a denser sampling of the facial soft tissue depths of a more representative subset of the actual Caucasian population over the different age and body posture subcategories. This database can be used as an updated chart for manual and computer-based craniofacial approximation and allows more refined analyses of the possible factors affecting facial soft tissue depth.  相似文献   
938.
The Asian tsunami of 26 December 2004, which devastated coastal parts of more than 10 countries in and around the Indian Ocean caused over 200,000 casualties. People from more than 58 nationalities were amongst the victims and subsequently an international effort for disaster victim identification (DVI) was set up, coordinated by Interpol. DVI teams from more than 20 countries took part in the identification process which, because of the complexity of the situation, had to be conducted in an internationally agreed upon procedure. Standard operating protocols of post-mortem (PM) procedures were established for fingerprinting, forensic pathology, forensic odontology and DNA profiling and were crucial in the quality of the entire DVI process of the quickly decomposing bodies. A very important and underestimated part of the DVI process is the gathering of the ante-mortem (AM) data of the persons reported missing in their home countries. In the wake of this tsunami event it appeared to be even more problematic as entire families had died and information was difficult to obtain. As dentistry proved to be the most valuable identification mean--up to 85% of the cases--the AM dental records proved to be crucial elements for DVI. Standard operating protocols (SOP) were again established as to who, where, when and what information had to be collected by the dentists by the AM teams abroad. Transcribing the AM dental information by experienced forensic odontologists was another crucial element in the whole identification procedure as the information had to be loaded into the DVI System International (Plass Data, Holbaek, Denmark) for comparison with incoming PM data. The Interpol DVI Standing Committee thus recommends that forward planning, adequate funding, international cooperation and standardisation are essential to guarantee an effective response to any major mass disaster of this kind in the future.  相似文献   
939.
940.
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