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   1537篇
  免费   57篇
各国政治   142篇
工人农民   81篇
世界政治   111篇
外交国际关系   99篇
法律   808篇
中国政治   6篇
政治理论   347篇
  2024年   2篇
  2023年   10篇
  2022年   14篇
  2021年   25篇
  2020年   39篇
  2019年   45篇
  2018年   81篇
  2017年   82篇
  2016年   79篇
  2015年   71篇
  2014年   58篇
  2013年   248篇
  2012年   118篇
  2011年   91篇
  2010年   52篇
  2009年   56篇
  2008年   62篇
  2007年   80篇
  2006年   40篇
  2005年   39篇
  2004年   36篇
  2003年   31篇
  2002年   36篇
  2001年   26篇
  2000年   31篇
  1999年   21篇
  1998年   10篇
  1997年   6篇
  1996年   12篇
  1995年   8篇
  1994年   3篇
  1993年   3篇
  1992年   6篇
  1991年   4篇
  1990年   6篇
  1989年   5篇
  1987年   2篇
  1986年   2篇
  1984年   6篇
  1983年   8篇
  1982年   7篇
  1981年   2篇
  1979年   5篇
  1978年   5篇
  1972年   3篇
  1967年   2篇
  1966年   2篇
  1963年   2篇
  1962年   2篇
  1957年   1篇
排序方式: 共有1594条查询结果,搜索用时 46 毫秒
211.
The I?can's phase method for the estimation of adult age at death from the sternal extremity of the fourth rib was introduced in 1983. Over the years, numerous tests have confirmed the reliability of this technique on varied samples. However, no large scale study has been conducted to test the application of this method on a modern white sample geographically, genetically, and culturally diverse from the American white database. Therefore, the purpose of this paper is to apply rib phase standards to a Turkish sample to test if the progression of morphological changes follow the same age sequence. Using a sample of 150 males and 144 females of known age at death, each rib was phased using the standards developed by I?can and associates in 1984 and 1985. The phase estimations were then subject to an analysis of variance. The results of the study indicated that Turkish ribs show the same morphological characteristics that define the phases at nearly identical ages. Variation as measured by the standard deviation increased from phase 5 on in both sexes. In conclusion, this study demonstrated that the rib phase standards can be accurately applied to Turks. Investigations of this nature are vital because one cannot assume that a method developed from one group is applicable to a distant population, especially in medicolegal proceedings.  相似文献   
212.
213.
Standing as a candidate in public elections has been characterized as the ultimate act of political participation. We test the hypothesis that acquiring office within civil organizations increases the probability of becoming a candidate in public elections. In order to take self-selection problems into account, we provide quasi-experimental evidence using election discontinuities, in which we compare the likelihood of being nominated for public office between closely ranked winners and losers in Swedish student union (SU) elections. Our original data cover 5,000 SU candidates and register data on their candidacies in public elections (1991–2010). The analysis provides support to the hypothesis: Students elected to SU councils were about 34 percent (6 percentage points) more likely to become a candidate in a public election than SU council candidates who were not elected. The causal impact is fairly stable over time. The analysis makes important contributions to two interrelated bodies of literature: First, it provides political recruitment literature with causal evidence that acquiring leadership experiences at arenas outside of representative democratic institutions facilitate entry into election processes. Second, it provides strong evidence to an increasingly contested issue within political participation research by showing that certain organizational activities increase individuals’ political involvement.  相似文献   
214.
215.
Areas of limited statehood where the state is absent or dysfunctional are rarely ungoverned or ungovernable spaces. The provision of rules and regulations, as well as of public goods and services – governance – does not necessarily depend on the existence of functioning state institutions. How can this be explained? To begin with, we identify functional equivalents to state institutions that fail to govern hierarchically. Moreover, we focus on informal institutions based on trust that are endogenous to areas of limited statehood. Personalized trust among community members enables actors to overcome collective action problems and enhances the legitimacy of governance actors. The main challenge in areas of limited statehood, which are often characterized by social heterogeneity and deep social and cultural cleavages (particularly in post‐conflict societies) is to move to generalized trust beyond the local level and to “imagined communities among strangers,” despite dysfunctional state institutions. We propose two mechanisms: First, the more group‐based identities are constructed in inclusive ways and the more group identities are cross‐cutting and overlapping, the more they lead to and maintain generalized trust. Second, experiences with fair and impartial institutions and governance practices – irrespective of whether state or non‐state – also lead to generalized trust beyond the local level and allow for the upscaling of governance.  相似文献   
216.
This study highlights the problem of levamisole‐adulterated cocaine in context of active traffic participation. For the purposes of levamisole concentration monitoring in human serum, an analytical method based on LC‐MS/MS and solid‐phase extraction was applied. A Luna 5 μm C18 (2) 100 A, 150 mm × 2 mm column and a mobile phase consisting of A (H2O/methanol = 95/5, v/v) and B (H2O/methanol = 3/97, v/v), both with 10 mM ammonium acetate and with 0.1% acetic acid (pH = 3.2), were used. The validation experiments demonstrated that the method applied was appropriate for levamisole quantification in human serum. For 23% of levamisole‐positive samples, the concentrations exceeded 20 ng/mL. Therefore, the interaction of this drug with cocaine has to be considered as important for active traffic participation. As a consequence, monitoring of levamisole concentration in human serum is recommended, as long as it is used as cocaine adulterant.  相似文献   
217.
School can be regarded as an important factor in the development of children’s values and attitudes. Given this great importance of justice experiences for students’ development, this study aimed at examining the influence of perceived injustice in school on students’ emotions, well-being, and behavior with an experimental longitudinal design. In total, 196 students participated in this study and came to the university with their classes to receive extra teaching once a week for six consecutive weeks. To manipulate justice perceptions, a scenario of arbitrary privilege was chosen to lead students of the experimental group to experience injustice from a beneficiary perspective. We found that students in the experimental group reported higher well-being and a higher appreciation of the opportunity to learn than the control group did. Additionally, they showed an increase in justice-related negative emotions over time; that is, they expressed more of a bad conscience and stronger feelings of anger the more they became aware of their privilege. This study shows that even subtle experiences of injustice in school can have an impact on students’ outcomes. These results are discussed with regard to practical implications.  相似文献   
218.
The difference in official crime statistics between women and men is a constant fact in criminology, but has yet to be explained in a satisfactory way. There are few studies addressing the issue of why this gender gap is larger in registered crime than it is in self-report studies. The study at hand comprises a survey among Greek and German students to examine whether this gap could be attributed to a gender-specific reporting of crime. Participants’ self-reported experiences of victimisation and their rating of the seriousness of offences depicted in case vignettes were used to gain insight into varying tendencies to report a crime depending on the offender’s gender. The act of reporting a crime did not vary gender-specifically.  相似文献   
219.
Produced water should be viewed as an environmental asset—part of the water resource solution—not as a waste that contributes to environmental problems; its treatment and reuse can reduce the stress on fresh water resources. Treatment cost is the most significant factor determining the volume of produced water that will be available for reuse. Water pricing, which is in large part a matter of public policy, must also be considered when reexamining how to maximize the use of this valuable resource. When deciding whether to treat and use produced water companies will need to weigh the risk of litigation and regulatory enforcement actions against the benefits of introducing treated water into the stream of commerce. Allaying the public's fear of chemicals in the water supply is also a significant factor in determining whether produced water is viewed as part of a water resource solution or as a waste by-product.  相似文献   
220.
In England and Wales, prisoners with mental disorder of such severity as to warrant inpatient treatment may be transferred to hospital under the Mental Health Act. UK Government guidance recommends that this process should be completed within 14 days; however, evidence suggests that in many cases it can take much longer. This retrospective service evaluation of 64 male prisoners, who were transferred under Section 47 or Section 48, aimed to evaluate transfer durations. The mean time from referral to admission was 76 days. Prisoners with a psychotic disorder were admitted more quickly. Remand prisoners were admitted more quickly than sentenced prisoners. Findings suggest that, in the UK the transfer time of prisoners under Sections 47 and 48 of the Mental Health Act continues to far exceed the 14-day target which raises concern about equivalence of care for prisoners. Our findings support arguments for fundamental amendments to the admissions process.  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