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   248篇
  免费   14篇
各国政治   13篇
工人农民   4篇
世界政治   18篇
外交国际关系   11篇
法律   123篇
政治理论   80篇
综合类   13篇
  2024年   1篇
  2023年   1篇
  2022年   3篇
  2021年   2篇
  2020年   4篇
  2019年   2篇
  2018年   10篇
  2017年   5篇
  2016年   7篇
  2015年   6篇
  2014年   11篇
  2013年   34篇
  2012年   16篇
  2011年   11篇
  2010年   6篇
  2009年   10篇
  2008年   12篇
  2007年   14篇
  2006年   8篇
  2005年   4篇
  2004年   9篇
  2003年   7篇
  2002年   4篇
  2001年   2篇
  2000年   4篇
  1999年   6篇
  1998年   4篇
  1997年   9篇
  1996年   4篇
  1995年   2篇
  1994年   5篇
  1993年   4篇
  1992年   5篇
  1991年   3篇
  1990年   1篇
  1988年   7篇
  1987年   1篇
  1986年   2篇
  1985年   2篇
  1984年   1篇
  1983年   1篇
  1982年   2篇
  1980年   1篇
  1979年   1篇
  1978年   4篇
  1972年   1篇
  1969年   1篇
  1968年   1篇
  1967年   1篇
排序方式: 共有262条查询结果,搜索用时 15 毫秒
151.
Government responses to the Covid-19 pandemic in the Nordic states—Denmark, Finland, Iceland, Norway, and Sweden—exhibit similarities and differences. This article investigates the extent to which crisis policymaking diverges from normal policymaking within the Nordic countries and whether variations between the countries are associated with the role of expertise and the level of politicization. Government responses are analyzed in terms of governance arrangements and regulatory instruments. Findings demonstrate some deviation from normal policymaking within and considerable variation between the Nordic countries, as Denmark, Finland, and to some extent Norway exhibit similar patterns with hierarchical command and control governance arrangements, while Iceland, in some instances, resembles the case of Sweden, which has made use of network-based governance. The article shows that the higher the influence of experts, the more likely it is that the governance arrangement will be network-based.  相似文献   
152.
Although international crises are often believed to represent windows of opportunity to strengthen European defence cooperation, recent crises have not seemed to produce a clear convergence of European Union (EU) member states’ security interests. This article seeks to address this puzzle by arguing that European defence cooperation is a response to crises that place European states in a situation of military interdependence. Conversely, asymmetric crises, i.e. crises that affect European states unevenly, encourage those states to maintain their autonomy of action. This theoretical argument is supported by two case studies: the failure of the European Defence Community in the early 1950s and the current difficulties experienced by the EU’s military operations. These two cases illustrate a striking continuity in that, because of (neo)colonial ties in particular, European states are often unevenly affected by international crises, which tends to make defence cooperation less effective.  相似文献   
153.
Recent challenges and errors in fingerprint identification have highlighted the need for assessing the information content of a papillary pattern in a systematic way. In particular, estimation of the statistical uncertainty associated with this type of evidence is more and more called upon. The approach used in the present study is based on the assessment of likelihood ratios (LRs). This evaluative tool weighs the likelihood of evidence given two mutually exclusive hypotheses. The computation of likelihood ratios on a database of marks of known sources (matching the unknown and non-matching the unknown mark) allows an estimation of the evidential contribution of fingerprint evidence. LRs are computed taking advantage of the scores obtained from an automated fingerprint identification system and hence are based exclusively on level II features (minutiae). The AFIS system attributes a score to any comparison (fingerprint to fingerprint, mark to mark and mark to fingerprint), used here as a proximity measure between the respective arrangements of minutiae. The numerator of the LR addresses the within finger variability and is obtained by comparing the same configurations of minutiae coming from the same source. Only comparisons where the same minutiae are visible both on the mark and on the print are therefore taken into account. The denominator of the LR is obtained by cross-comparison with a database of prints originating from non-matching sources. The estimation of the numerator of the LR is much more complex in terms of specific data requirements than the estimation of the denominator of the LR (that requires only a large database of prints from an non-associated population). Hence this paper addresses specific issues associated with the numerator or within finger variability. This study aims at answering the following questions: (1) how a database for modelling within finger variability should be acquired; (2) whether or not the visualisation technique or the choice of different minutiae arrangements may influence that modelling and (3) what is the magnitude of LRs that can be expected from such a model. Results show that within finger variability is affected by the visualisation technique used on the mark, the number of minutiae and the minutiae configuration. They also show that the rates of misleading evidence in the likelihood ratios obtained for one of the configurations examined are low.  相似文献   
154.
ABSTRACT

For national publics, terrorism is today one of the key policy challenges facing European governments. Yet little is known about whether and how the objective national economic, societal and political context influences public opinion about terrorism. The present article addresses this gap in the current research. Using Eurobarometer data, it is demonstrated that excluding a nation’s level of terrorism, no other objective national economic, societal or political indicator sways public attitudes towards terrorism. Objective national economic, societal and political factors are also found not to impact on the relationship between citizens’ economic conditions and public attitudes towards the same. Our results finally demonstrate that people’s perceived economic, cultural and physical (safety) insecurities tend to be a stronger predictor of these attitudes than the objective national context or (social) class differences. The article then discusses the implications of these ?ndings.  相似文献   
155.
Cellulose and lactose are the most frequently used excipients in illicit ecstasy production. The aim of this project was to use near infrared reflectance spectroscopy (NIRS) for the determination of the different chemical forms of these two substances, as well as for the differentiation of their origin (producer). It was possible to distinguish between the different chemical forms of both compounds, as well as between their origins (producers), although within limits. Furthermore, the possibilities to apply NIR for the analysis of substances such as found in illicit tablets were studied. First, a few cellulose and lactose samples were chosen to make mixtures with amphetamine at three degrees of purity (5, 10 and 15%), in order to study the resulting changes in the spectra as well as to simultaneously quantify amphetamine and identify the excipient. A PLS2 model could be build to predict concentrations and excipient. Secondarily, the technique was to be applied to real ecstasy tablets. About 40 ecstasy seizures were analysed with the aim to determine the excipient and to check them against each other. Identification of the excipients was not always obvious, especially when more than one excipient were present. However, a comparison between tablets appeared to give groups of similar samples. NIR analysis results in spectra representing the tablet blend as a whole taking into account all absorbing compounds. Although NIRS seems to be an appropriate method for ecstasy profiling, little is known about intra- and intervariability of compression batches.  相似文献   
156.
Abstract: This study examined eight previously published ear prediction methods by Welcker, Gerasimov, Fedosyutkin and Nainys, and Broadbent and Mathews. Computed tomography scans of 78 living adults (n1) did not support any of these previously published recommendations. Free earlobes were found to accompany protruding supramastoid crests (Pearson’s χ² < 0.05); and ear length [l] and width [w] differed by sex (p < 0.05), correlated with age (r = 0.38[l]; 0.32[w]), and correlated with facial height (r = 0.37[l]; 0.30[w]). New regression equations (for ear length and width) were generated using these variables in several samples and, where possible, cross‐validated using independent data (n1 = 78, n2 = 2190, n3 = 1328, n4 = 1010, and n5 = 47). As a result of these analyses, four valid and tested methods for ear prediction were identified, but large degrees of error continue to make accurate prediction of the ear, from the skull, problematic.  相似文献   
157.
The objective of this study was to provide a psychological profile of parents who have been formally accused of child maltreatment. A clinical group of 16 parents accused of physical abuse and 22 parents accused of neglect were compared with 18 parents from a control group. The MCMI-III was administered individually for each parent. Both groups of maltreatment showed significant differences on different scales of the MCMI-III. No difference was seen between the parents of both groups of child maltreatment. Many parents of both child maltreatment groups reported at least one form of abuse during their childhood, suggesting that a childhood marked by abuse or neglect on the part of a parent could result in personality disorders and that these disorders may have something to do with the intergenerational transmission of abuse.  相似文献   
158.
159.
160.
Modern institutional theory specifies two different aspects of institutions. The first aspect—and by far the predominant perspective—sees institutions as recurrent patterns of behavior, values, norms and practices which guide social and political behavior. The second aspect refers to the manifest institutional systems of the state. These two sides of institutions are supposed to be mutually reinforcing. Thus, institutions are "embedded" in overarching systems of values at the same time as they "constrain" behavior. This article takes exactly the opposite approach and seeks to separate the two different meanings of institutions in order to explain changes in the effective capabilities of manifest institutions. Using the Japanese Ministry of International Trade and Industry (MITI) as an empirical case, the argument advanced in the article is that variations in the institutional leverage and capacity of MITI can to a significant extent be explained by changes in the relationship between "abstract" and "manifest" institutions, i.e. the extent to which the institutional arrangement of the state reflects predominant systems of values, norms and beliefs in society. In addition to the vast literature on institutional theory, the article draws on a series of interviews with MITI senior officials between 1988 and 1996 as well as on the literature on Japanese political economy.  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