全文获取类型
收费全文 | 400篇 |
免费 | 20篇 |
专业分类
各国政治 | 29篇 |
工人农民 | 51篇 |
世界政治 | 21篇 |
外交国际关系 | 18篇 |
法律 | 208篇 |
中国政治 | 3篇 |
政治理论 | 84篇 |
综合类 | 6篇 |
出版年
2023年 | 3篇 |
2021年 | 3篇 |
2020年 | 10篇 |
2019年 | 13篇 |
2018年 | 17篇 |
2017年 | 17篇 |
2016年 | 11篇 |
2015年 | 11篇 |
2014年 | 8篇 |
2013年 | 67篇 |
2012年 | 14篇 |
2011年 | 12篇 |
2010年 | 11篇 |
2009年 | 8篇 |
2008年 | 15篇 |
2007年 | 23篇 |
2006年 | 13篇 |
2005年 | 9篇 |
2004年 | 8篇 |
2003年 | 6篇 |
2002年 | 10篇 |
2001年 | 8篇 |
2000年 | 11篇 |
1998年 | 6篇 |
1997年 | 10篇 |
1996年 | 4篇 |
1995年 | 2篇 |
1994年 | 5篇 |
1993年 | 12篇 |
1992年 | 5篇 |
1991年 | 8篇 |
1990年 | 6篇 |
1989年 | 6篇 |
1988年 | 8篇 |
1987年 | 3篇 |
1986年 | 4篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1981年 | 2篇 |
1980年 | 5篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1971年 | 1篇 |
1970年 | 1篇 |
排序方式: 共有420条查询结果,搜索用时 453 毫秒
141.
142.
143.
M. Victoria Costa 《Critical Review of International Social and Political Philosophy》2016,19(4):400-415
This article examines the normative status of border controls from a neo-republican perspective, grounded in the value of freedom as non-domination. It makes use of Philip Pettit’s account of this kind of freedom and discusses Pettit’s own remarks on the status of border controls. Against Pettit, it argues that the domination generated by border controls is ineliminable given existing political institutions, because such controls cannot avoid subjecting non-citizens to coercion in ways that are not forced to track their interests. The article also argues for an alternative neo-republican account of border controls that does not deny their coerciveness but allows for certain border control policies in non-ideal circumstances. 相似文献
144.
Ana Claudia Martins Ciconelle BSc MSc Renan Lucio Berbel da Silva DDS MSc Jun Ho Kim DDS MSc PhD Bruno Aragão Rocha MD Dênis Gonçalves dos Santos BSc Luis Gustavo Rocha Vianna BSc MSc Luma Gallacio Gomes Ferreira BSc Vinícius Henrique Pereira dos Santos Jeferson Orofino Costa DDS Renato Vicente BSc MSc PhD 《Journal of forensic sciences》2023,68(6):2057-2064
The objective of this study is to assess the performance of an innovative AI-powered tool for sex determination using panoramic radiographs (PR) and to explore factors affecting the performance of the convolutional neural network (CNN). The study involved 207,946 panoramic dental X-rays and their corresponding reports from 15 clinical centers in São Paulo, Brazil. The PRs were acquired with four different devices, and 58% of the patients were female. Data preprocessing included anonymizing the exams, extracting pertinent information from the reports, such as sex, age, type of dentition, and number of missing teeth, and organizing the data into a PostgreSQL database. Two neural network architectures, a standard CNN and a ResNet, were utilized for sex classification, with both undergoing hyperparameter tuning and cross-validation to ensure optimal performance. The CNN model achieved 95.02% accuracy in sex estimation, with image resolution being a significant influencing factor. The ResNet model attained over 86% accuracy in subjects older than 6 years and over 96% in those over 16 years. The algorithm performed better on female images, and the area under the curve (AUC) exceeded 96% for most age groups, except the youngest. Accuracy values were also assessed for different dentition types (deciduous, mixed, and permanent) and missing teeth. This study demonstrates the effectiveness of an AI-driven tool for sex determination using PR and emphasizes the role of image resolution, age, and sex in determining the algorithm's performance. 相似文献
145.
Cristiano O. L. Goulart MS Clésia C. Nascentes PhD Letícia M. Costa PhD 《Journal of forensic sciences》2023,68(5):1713-1720
The recovery of identifiable fingerprints from fired cartridge cases is challenging. Therefore, the characterization of chemical modifications and their effects on fingerprint integrity post-firing is essential. In this study, the primary fingerprint lipids, including myristic acid, pentadecanoic acid, palmitoleic acid, palmitic acid, stearic acid, squalene, and cholesterol in fired and unfired cartridges, were extracted with acetonitrile, followed by derivatization using N,O-Bis(trimethylsilyl)trifluoroacetamide with 1% trimethylchlorosilane (BSTFA/1%TMCS). Squalane was used as the internal standard, and all quantifications were performed using gas chromatography coupled with mass spectrometry using a triple-quadrupole mass filter. All lipids identified in the unfired cartridges were also detected in the fired cartridges, and statistical analysis using Student's t-test and F tests was performed with a 95% confidence level. The concentration of lipids in the unfired cartridges was found to be similar to that detected in the fired cartridges, except for squalene, the recovery of which was 28% lower in the fired cartridges. 相似文献
146.
Crime, Law and Social Change - The paper investigates the role of criminal networks in fostering illegal wildlife trade (IWT), and how these relational structures interact with transnational... 相似文献
147.
Kevin M. Beaver Joseph L. Nedelec Christian da Silva Costa Ana Paula Poersch Mônica Celis Stelmach Micheli Cristina Freddi Jamie M. Gajos Cashen Boccio 《Journal of criminal justice》2014
Purpose
Psychopathy and psychopathic personality traits (PPT) have been linked to a long list of negative life outcomes. To date, however, few studies have provided a systematic analysis of whether psychopathic personality traits contribute to increased health burden. The current study was designed to address this gap in the literature.Method
This study analyzed data from the National Longitudinal Study of Adolescent Health and employed a measure of PPT derived from the five-factor model of personality. Analyses were conducted using OLS, logistic, and Poisson regression techniques.Results
The results revealed that relatively higher scores on psychopathic personality traits were associated with a slight increase in a wide range of negative health outcomes. These significant associations were detected for both males and females.Conclusions
We speak to the importance of these findings for the potential to reduce health burden among psychopaths and those who score relatively high on measures of psychopathic personality traits. 相似文献148.
Abstract Globalisation is increasingly placing greater pressure on economies of countries to become competitive and to develop higher levels of skills. In order to compete effectively on a global level, education and development must be based on a good foundation. Although formal education in South Africa is presently reaching the majority of children between the ages of seven and fifteen years, actual educational attainment is low. According to the Third International Mathematics and Science Study, South African pupils performed poorly in Mathematics and Physical Science compared to other participating countries. This low attainment could be addressed by stimulating a learning culture through the medium of telematics. There have been a number of such nationwide initiatives aimed at transforming the country into a 'knowledge-based society' through the use of ICTs. One such initiative is the University of Pretoria's 'TeleTuks' educational satellite broadcasts to schools. This article concentrates on the benefits of tele-education for schools participating in TeleTuks as perceived by teachers and by learners. This study was also done to determine to what extent schools are able to participate in the various ICT-related options available; and what problems participating schools are experiencing. It was found that satellite TV is effective in supplementing classroom education by fostering an interactive learning culture, although it has not been utilised and implemented widely enough. 相似文献
149.
150.
This article aims to examine how the evaluation of party leaders’ traits influences voting behaviour. The work incorporates data from election studies across seven countries with different social contexts (Portugal, Spain, Ireland, Germany, United Kingdom, Italy and Hungary). Characteristics of leaders were placed into two groups: competence and warmth, in accordance with the stereotype content model and relevant studies on evaluations of leaders’ traits. Since different personality traits were evaluated within each country, the analysis was based on the two aforementioned dimensions and the political ideology of the leader. Multiple sequential binary logistic regression models were performed to analyse the predictive power of competence and warmth on voting behaviour, controlling for socio-demographic and political ideology variables of voters. Results reinforce the personalisation of politics theory, showing the relevance of leaders’ warm personality traits. As for the competence dimension, it was proven to be decisive only with regard to left-wing party leaders. 相似文献