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   885篇
  免费   56篇
各国政治   78篇
工人农民   90篇
世界政治   83篇
外交国际关系   49篇
法律   448篇
中国共产党   1篇
中国政治   6篇
政治理论   184篇
综合类   2篇
  2024年   1篇
  2023年   6篇
  2022年   5篇
  2021年   10篇
  2020年   34篇
  2019年   41篇
  2018年   55篇
  2017年   57篇
  2016年   59篇
  2015年   33篇
  2014年   50篇
  2013年   156篇
  2012年   34篇
  2011年   40篇
  2010年   38篇
  2009年   31篇
  2008年   24篇
  2007年   30篇
  2006年   23篇
  2005年   35篇
  2004年   25篇
  2003年   36篇
  2002年   26篇
  2001年   8篇
  2000年   9篇
  1999年   3篇
  1998年   8篇
  1997年   7篇
  1996年   9篇
  1995年   9篇
  1994年   3篇
  1993年   5篇
  1992年   3篇
  1991年   5篇
  1990年   2篇
  1989年   2篇
  1988年   2篇
  1987年   5篇
  1986年   1篇
  1985年   2篇
  1984年   2篇
  1983年   2篇
  1980年   2篇
  1979年   1篇
  1978年   1篇
  1976年   1篇
排序方式: 共有941条查询结果,搜索用时 15 毫秒
161.
This introduction discusses the contributions in the special issue. The articles present results concerning the practice of birth control, mainly at the family level. They represent different analytical approaches where both interviews, letters, surveys and micro-level data have been used. The European fertility decline has made a fundamental change to the societies in the 20th and 21st centuries. Birth control spreads rapidly. Research in this field requires both qualitative and quantitative studies, where both approaches contribute to different perspectives on the transition. The articles in the issue discuss several themes in relation to birth control, of which three are developed in the introduction. These are gender and fertility, gender and health and finally how to control fertility. The presented results demonstrate the importance of including gender in the analyses of the fertility decline. A gender perspective makes it natural to consider historical persons as agents. It is also necessary to acknowledge that we should not treat the married couple as a single unit. They may have conflicting interests, something that several of the articles illustrate. One aspect we would like to emphasize is how health problems can influence the will to have more children and this affects birth control. This is a theme that in different forms is taken up by several of the authors. Finally, families practiced birth control with several different methods that also changed throughout the married years, thus demonstrating a flexibility that is often overlooked in conventional methods for the analysis of fertility.  相似文献   
162.
Bite mark analysis in forensic dentistry presupposes that the human dentition is unique and that its characteristics can be transferred precisely to several materials. The aim of the present study was to register the frequency of missing anterior teeth in the Brazilian adult population, discussing its potential importance in bite mark analysis. Data from the Brazilian Oral Health Survey were used; 13,431 male and female individuals aged 35 to 44 were examined according to the criteria of the World Health Organization. The analysis of Poisson regression was performed in order to calculate the rating ratios and the respective confidence interval at 95%. A total of 13,431 adults participated in the study. Among male individuals, 2063 (47.00%) were dentate and 2036 (46.40%) had at least one missing tooth. Only 254 (5.83%) were totally edentulous. A significant number of males and females presented 6 missing teeth in the same dental arch, revealing the poor state of oral health of adult Brazilians. Missing teeth were more frequent in the upper dental arch than in the lower arch. In the upper dental arch, the incisor group (central and lateral) was missing the most. In the lower dental arch, however, a certain lack of homogeneity was observed among the different dental groups as regards missing teeth. White individuals presented a smaller proportion of missing teeth compared to the other ethnic groups. Females were 1.61 (CI 1.50–1.73) times more likely than males to present missing teeth. The absence of upper teeth and the presence of lower teeth were observed in 16.10% of the individuals. Further research should also include an analysis of different age groups. This would increase the potential of applying this kind of information to bite mark analysis.  相似文献   
163.
The nations of the world are generally shaped by a cultural diversity, which must be preserved. This leads to a fundamental and essential defense of indigenous groups and their human rights. The purpose of this article is to highlight the importance of defending human rights of indigenous cucapa, natives settled in the northeast of the state of Baja California in the Delta of the Colorado River, especially with regards to their fishing rights, which is their main source of food and survival. The environmental laws that have been issued in the country have greatly affected them, banning commercial fishing in some areas and totally in many other areas, adding to that a not to subtle performance by the appropriate regulation authorities, preventing them from fishing sea bass, hence their consumption and marketing, which is reflected in their socioeconomic status. For this reason and in response to this violation of their human rights, women have decided to enter a cucapa womb strike, which threatens the existence of the tribe by not reproducing.  相似文献   
164.
The purpose of this essay is to highlight the fact that certain specific governing or guideline criteria are in fact necessary before one can establish cases in which it would be admissible to treat the genders unequally. Those criteria, insofar as women's rights are concerned, consist of the need to overcome a situation of inequality which arises due to cultural and social reasons. An analysis of the different types of feminist movements follows, concluding that feminism implies two types of hypotheses. On one level feminism can be said to be a theory for equality; on another level it is a theory which turns around the objectivity of law, although it does, in both cases, challenge classical political and iudicial theses.  相似文献   
165.
Angola is located in the African continent, in the area of southern Africa and has a population of approximately 14 million inhabitants. The Angola population has origin from Occidental and Southern Bantu people that came from the great lakes region, creating the most ever known African migration of our days.Allele frequencies for the 15 STRs loci in the AmpFlSTR Identifiler kit (D8S1179, D21S11, D7S820, CSF1PO, D3S1358, HUMTH01, D13S317, D16S539, D2S1338, D19S433, HUMVWA, TPOX, D18S51, D5S818, HUMFIBRA/FGA and including the segment of the X-Y homologous gene amelogenin) were studied for Angola population.The genotype frequency of the 15 STR loci showed no significant deviations from Hardy–Weinberg equilibrium expectations and great values for the combined power of discrimination and combined power of a priori exclusion validate the application of these markers in forensic genetics. Comparative analyses between Angola population data and other relevant population database from Africa, Europe and American are presented.  相似文献   
166.
This study aimed to develop and to assess an algorithm to facilitate lip print visualization, and to digitally analyze lip prints on different supports, by superimposition. It also aimed to classify lip prints according to sex. A batch image processing algorithm was developed, which facilitated the identification and extraction of information about lip grooves. However, it performed better for lip print images with a uniform background. Paper and glass slab allowed more correct identifications than glass and the both sides of compact disks. There was no significant difference between the type of support and the amount of matching structures located in the middle area of the lower lip. There was no evidence of association between types of lip grooves and sex. Lip groove patterns of type III and type I were the most common for both sexes. The development of systems for lip print analysis is necessary, mainly concerning digital methods.  相似文献   
167.
Previous research on the RAG color‐coded prioritization systems for the discovery of clandestine graves has not considered all the factors influencing the burial site choice within a GIS project. The goal of this technical note was to discuss a GIS‐based quantitative approach for the search of clandestine graves. The method is based on cross‐referenced RAG maps with cumulative suitability factors to host a burial, leading to the editing of different search scenarios for ground searches showing high‐(Red), medium‐(Amber), and low‐(Green) priority areas. The application of this procedure allowed several outcomes to be determined: If the concealment occurs at night, then the “search scenario without the visibility” will be the most effective one; if the concealment occurs in daylight, then the “search scenario with the DSM‐based visibility” will be most appropriate; the different search scenarios may be cross‐referenced with offender's confessions and eyewitnesses’ testimonies to verify the veracity of their statements.  相似文献   
168.
The aim of this presentation was to share an uncommon form of sudden death, suffered by a 64‐year‐old woman, due to a mechanical obstruction of hypopharynx by an undiagnosed B‐cell lymphoma, infiltrating the inferior pharyngeal constrictor muscle. A forensic approach by means of scene investigation, circumstantial data collection, autopsy, and histological and toxicological investigations led to conclude that the cause of death was asphyxia, correlated with B‐cell lymphoma of the hypopharynx. The autopsy examination highlighted the presence of a wall thickening, infiltrating, and projecting into the hypopharynx lumen. The histological analysis showed the essential finding of a B‐cell lymphoma of the hypopharynx, diffusely infiltrating the inferior pharyngeal constrictor muscle. To conclude, this case demonstrates once more that in the absence of specific data, a thorough forensic investigation including autopsy, histological examination, and circumstantial data collection is mandatory to reach a correct cause of death.  相似文献   
169.
170.
The direct relationship between government effectiveness and the population's well-being has generated a growing interest about the explanatory factors of governance quality. Thus, the aim of this study is to determine the determinants of government effectiveness, in relation to the organizational environment and political and internal characteristics of public administrations. For this, we used a sample composed by 202 countries observed between 2002 and 2008. A World Bank governance indicator represents the government effectiveness. We estimated a panel data dependence model by the Generalized Method of Moments estimator to avoid heterogeneity and endogeneity problems. Furthermore, a CHAID algorithm provides a classification of governance quality according to the predicted determinants.

The results show that government effectiveness is initially explained by the organizational environment, related to economic development and educational status. Later, and according to countries’ income distribution, political constrains and some organizational characteristics, such as gender diversity and government size, may improve governance quality.  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