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   13188篇
  免费   412篇
各国政治   855篇
工人农民   496篇
世界政治   1051篇
外交国际关系   715篇
法律   6957篇
中国政治   89篇
政治理论   3318篇
综合类   119篇
  2021年   84篇
  2020年   173篇
  2019年   233篇
  2018年   280篇
  2017年   340篇
  2016年   352篇
  2015年   217篇
  2014年   302篇
  2013年   1811篇
  2012年   315篇
  2011年   319篇
  2010年   319篇
  2009年   324篇
  2008年   328篇
  2007年   400篇
  2006年   380篇
  2005年   382篇
  2004年   374篇
  2003年   371篇
  2002年   351篇
  2001年   394篇
  2000年   349篇
  1999年   326篇
  1998年   182篇
  1997年   167篇
  1996年   160篇
  1995年   154篇
  1994年   170篇
  1993年   142篇
  1992年   205篇
  1991年   245篇
  1990年   216篇
  1989年   206篇
  1988年   211篇
  1987年   228篇
  1986年   223篇
  1985年   213篇
  1984年   180篇
  1983年   184篇
  1982年   127篇
  1981年   146篇
  1980年   105篇
  1979年   157篇
  1978年   117篇
  1977年   104篇
  1976年   87篇
  1975年   97篇
  1974年   103篇
  1973年   95篇
  1972年   70篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
Three modeling methods were used to estimate the time for laying of Lucilia sericata eggs (Diptera, Calliphoridae) after measurements of hatching times at several constant temperatures. These models were tested first under controlled conditions with 19 profiles of fluctuating temperatures, and on the other hand under field conditions on mice. All three models were allowed to determine the time of laying within a period of about 2h, and consequently this determines the time of death, as this species lays immediately after death under favorable conditions. Rearing of eggs sampled on a corpse may therefore contribute to the determination of a short post-mortem interval (PMI).  相似文献   
962.
Bite mark identification is based on the individuality of a dentition, which is used to match a bite mark to a suspected perpetrator. This matching is based on a tooth-by-tooth and arch-to-arch comparison utilising parameters of size, shape and alignment. The most common method used to analyse bite mark are carried out in 2D space. That means that the 3D information is preserved only two dimensionally with distortions. This paper presents a new 3D documentation, analysis and visualisation approach based on forensic 3D/CAD supported photogrammetry (FPHG) and the use of a 3D surface scanner. Our photogrammetric approach and the used visualisation method is, to the best to our knowledge, the first 3D approach for bite mark analysis in an actual case. The documentation has no distortion artifacts as can be found with standard photography. All the data are documented with a metric 3D measurement, orientation and subsequent analysis in 3D space. Beside the metrical analysis between bite mark and cast, it is possible using our method to utilise the topographical 3D feature of each individual tooth. This means that the 3D features of the biting surfaces and edges of each teeth are respected which is--as shown in our case--very important especially in the front teeth which have the first contact to the skin. Based upon the 3D detailed representation of the cast with the 3D topographic characteristics of the teeth, the interaction with the 3D documented skin can be visualised and analysed on the computer screen.  相似文献   
963.
964.
Fibronectin, MRP8, MRP14 and defensin were detected immunohistochemically in 46 surgically treated, fresh (hours old) human wounds and in wounds of 13 individuals who died immediately from fatal trauma (airplane crashes or train rollovers). In immediate fatal trauma, it was not possible to detect fibronectin outside of bleeding areas nor could inflammatory cells be visualized in the interstitium using MRP8, MRP14, or defensin antibodies. Fibronectin staining could be regularly demonstrated in wounds at least 20 min-old. Granulocytic infiltrates limited to the perivasal space could be detected 20-30 min after infliction of the wound expressing MRP8, MRP14 and defensin. It was also possible to detect fibronectin networks and MRP8-, MRP14-, and defensin-positive granulocytes and macrophages in particular wounds up to 30 days-old. No differences between the expression of MRP8 and MRP14 could be demonstrated in the wounds, the majority of which were only several hours old. As wound age increased, the number of defensin-positive granulocytes detected decreased. The immunohistochemical detection of fibronectin is a useful way to demonstrate vitality in fresh wounds, beginning about 20-30 min post-trauma. However, detection of MRP8, MRP14 and defensin provides no advantage over the routine histological detection of granulocytes and macrophages in wounds under 1-2 days old.  相似文献   
965.
Blowfly larvae found on human corpses are important for the estimation of the postmortem interval (PMI) and other questions of forensic relevance. Some of these species are difficult to differentiate morphologically, therefore a molecular method was elaborated for species identification. Specific fragments of the COI and COII region of the mitochondrial DNA (mtDNA) were amplified followed by digestion with different restriction enzymes. Using a 1.3 kb fragment, identification of Lucilia sericata, Calliphora vicina and Calliphora vomitoria was possible by digestion with only one restriction enzyme using either DraI or HinfI. Furthermore, we sequenced 349 bp (a part of the COI and COII regions) from the same three species and found 34 nucleotide distinctions between C. vicina and L. sericata, 30 between C. vomitoria and L. sericata and 15 between the two Calliphora species. These results aid in quick identification of species used for estimation of PMI.  相似文献   
966.
Nineteen Y-chromosomal short tandem repeats (STRs), DYS19, DYS389-I, DYS389-II, DYS390, DYS391, DYS392, DYS393, DYS385, DYS388, DYS434, DYS435, DYS436, DYS437, DYS438, DYS439, DYS460, DYS461 and DYS462 were typed in Inuit (n=70) and Danish (n=62) population samples.  相似文献   
967.
Fraser  David 《Law and Critique》2003,14(3):253-275
In October and November 1940, the German Military Command which ruled conquered Belgium, introduced a series of measures aimed at the identification and exclusion of the Jews of that country. The Belgian government of the day refused to allow the measures to be incorporated into Belgian law, but did permit, under their reading of the Hague Convention, government departments and local administrations to assist in implementing the German anti-Jewish Decrees. The Brussels Bar, Prosecutors and Court of Cassation refused to accept the authority of the Occupier to violate basic rights guaranteed under the Belgian Constitution. Officials in Antwerp, on the other hand, struck all lawyers identified as "Jews" from the Roll. This article examines these instances of "constitutional patriotism" and "constitutional betrayal" by these actors in the Belgian legal system, and offers some preliminary discussion of important questions about our historical and current understandings of legality, legitimacy and citizenship in light of this part of the Belgian experience of law under Nazi occupation. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   
968.
969.
970.
Fundamentalist affiliation and religious beliefs are generally related to more punitive attitudes toward criminals. Fundamentalists also tend to attribute criminality to individual dispositional factors, and in turn, such factors are related to punitiveness. Recently, it has also been found that compassionate dimensions of religion are related to treatment-oriented policies. It is still not clear which dimensions of religion are related to punitive or treatment ideology and what effects religious variables may have when tested against secular concerns about crime and crime attributions. In the present research, we test three models of punitiveness and one model of rehabilitation with demographic, secular, religious, and attributional factors. We found that those for whom religion is salient in their daily lives tend to believe that the death penalty should be reserved for older offenders and that those who believe in a punitive God tend to support harsher punishments.  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