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   4463篇
  免费   144篇
各国政治   386篇
工人农民   142篇
世界政治   444篇
外交国际关系   346篇
法律   1794篇
中国共产党   2篇
中国政治   41篇
政治理论   1412篇
综合类   40篇
  2023年   20篇
  2022年   29篇
  2021年   71篇
  2020年   98篇
  2019年   107篇
  2018年   152篇
  2017年   164篇
  2016年   170篇
  2015年   112篇
  2014年   142篇
  2013年   770篇
  2012年   137篇
  2011年   147篇
  2010年   111篇
  2009年   161篇
  2008年   185篇
  2007年   185篇
  2006年   133篇
  2005年   125篇
  2004年   129篇
  2003年   106篇
  2002年   118篇
  2001年   89篇
  2000年   82篇
  1999年   78篇
  1998年   70篇
  1997年   63篇
  1996年   59篇
  1995年   69篇
  1994年   55篇
  1993年   54篇
  1992年   40篇
  1991年   55篇
  1990年   33篇
  1989年   46篇
  1988年   38篇
  1987年   39篇
  1986年   51篇
  1985年   17篇
  1984年   33篇
  1983年   31篇
  1982年   34篇
  1981年   21篇
  1980年   28篇
  1979年   19篇
  1978年   25篇
  1977年   20篇
  1976年   17篇
  1974年   21篇
  1969年   8篇
排序方式: 共有4607条查询结果,搜索用时 15 毫秒
321.
In recent years, there has been a surge in patenting by Belgian universities. It appears that this increase can be attributed to growth of biotechnology, where there is a greater propensity to patent, to a desire on the part of universities to enhance commercialization through technology transfer offices (TTOs), and to effective collaboration between universities and government-sponsored research centers. Our qualitative analysis reveals that patent statistics could be a misleading indicator of an individual university's technological productivity, since many inventions are developed at universities, yet applied by other institutions.  相似文献   
322.
195 cases of homicide, grouped according to juridical assessment, were retrospectively analysed with regard to individual characteristics of perpetrators and victims, circumstances, and mode of commitment. The involvement of underage victims and perpetrators as well as differences between the urban and rural areas studied were taken into special consideration. To summarise, the majority of the offences studied was carried out by a male perpetrator with a mean age of 35 years driven by personal motives or greed in his immediate vicinity and affected family members or close acquaintances. The fatal injuries were mainly attributable to sharp or blunt force. With regard to killings of children, a higher prevalence of female victims and male assailants, emotional motives and an even higher importance of the social vicinity were found. Particularly in victims younger 12 years of age, manual modes of commitment without application of any tools were predominantly encountered. The comparison of urban and rural areas revealed a higher homicide rate in municipal areas especially of offences with a loose relationship between victims and assailants (greed, sexual assault). In contrast, rural areas exhibited higher rates of bodily harm with fatal consequences as well as offences by highly intoxicated assailants.  相似文献   
323.
A method was developed to screen for pepper spray residue using instruments and methods other than those techniques commonly employed to analyze chemical residue (i.e.. gas chromatography mass spectrometry-GCMS or liquid chromatography mass spectrometry-LCMS). The method employed gas chromatography (GC), thin layer chromatography (TLC), and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) to screen for dried pepper spray stains. Pepper sprays from nine different manufacturers were investigated. Capsaicin and dihydrocapsaicin were identified and unique IR reflectance spectra are presented. An additional five compounds were presumptively found. Results showed that a particular stain could be characterized as a pepper-based stain.  相似文献   
324.
The body of a 44-year-old scuba diver was examined using postmortem multislice computed tomography (MSCT) and magnetic resonance imaging (MRI), and findings were verified by subsequent autopsy. The goal was to find out whether the important pathomorphological findings for the reconstruction of events and the identification of cause and manner of death could be identified using modem digital cross-sectioning techniques. The findings of a massive vital decompression with pulmonary barotrauma and lethal gas embolism were identified in the radiological images. MSCT and MRI were superior to autopsy in the demonstration of the extent and distribution of gas accumulation in intraparenchymal blood vessels of internal organs as well as in areas of the body inaccessible by standard autopsy.  相似文献   
325.
The presence of cocaine in illicit drug samples is still being determined in some laboratories using spot tests and microcrystal tests. Seventeen chemical species were tested using three different spot tests (Wagner, Marquis, and cobalt thiocyanate followed by stannous chloride reactions) and two microcrystal tests (gold chloride and platinic chloride) to determine whether the results could be differentiated from the results of these tests on cocaine. The data obtained indicated that nine of the 17 compounds gave results similar to those from cocaine using the three spot tests, but that the results from microcrystal testing allowed for differentiation of all nine compounds from cocaine.  相似文献   
326.
327.
328.
The Principle of Full Compensation in Tort Law   总被引:2,自引:2,他引:0  
According to the principle of full compensation, tort law seeks to put the victim in the position he was in before the tort. This position is generally considered to be the situation where the victim does not suffer any harm at all. We consider an alternative interpretation. If an injurer takes due care, the victim is faced with expected harm. This can be considered the victim's expected harm in the situation he was in before the tort. Thus conceived full compensation requires a negligent injurer to pay damages which bring the (potential) victim ex ante in the same position as the victim was in the case where the (potential) injurer takes due care. We investigate the consequences of this restated negligence rule. For due care levels larger than efficient care, the standard negligent rule may lead to excessive care, whereas the restated negligent rule always leads to efficient care. Furthermore, the activity level under the restated negligent rule is greater than the activity level under the standard negligent rule, which itself is greater than the efficient activity level. Social welfare under the restated negligence rule can either be higher or lower than social welfare under the standard negligence rule.  相似文献   
329.
Law and Critique - The degree of truth of Casanova’s History of My Life is a matter of heated debate. Doubt has been cast particularly on whether his stories of incest with his daughters...  相似文献   
330.
Garnishment of wage as a way for creditors to enforce payment by unwilling or insolvent debtors, while very common in Germany and Switzerland, is not very successful. Based on a dynamic model of debtor behaviour, this paper explores two alternatives of reform. One is to reduce the rate of garnishment, which at present amounts to 100 percent of the wage income exceeding a defined subsistence level, thus probably destroying incentives to work. According to model simulations, reducing the rate of garnishment is likely to result in an increase of labour supply but a decrease of garnishment revenue per period. Second, the introduction of a debt release as it exists in the United States would have an ambiguous effect on labour supply. While providing debtors with a fresh start, it would result a partial loss for creditors. A Pareto improvement thus does not seem to be possible. When taxpayers as an involved third party are taken into account, however, a potential Pareto improvement appears attainable through debt release.  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