全文获取类型
收费全文 | 1980篇 |
免费 | 530篇 |
专业分类
各国政治 | 112篇 |
工人农民 | 31篇 |
世界政治 | 37篇 |
外交国际关系 | 78篇 |
法律 | 1569篇 |
中国共产党 | 5篇 |
中国政治 | 70篇 |
政治理论 | 529篇 |
综合类 | 79篇 |
出版年
2024年 | 1篇 |
2023年 | 6篇 |
2022年 | 6篇 |
2021年 | 44篇 |
2020年 | 70篇 |
2019年 | 175篇 |
2018年 | 165篇 |
2017年 | 144篇 |
2016年 | 161篇 |
2015年 | 139篇 |
2014年 | 140篇 |
2013年 | 403篇 |
2012年 | 224篇 |
2011年 | 171篇 |
2010年 | 100篇 |
2009年 | 69篇 |
2008年 | 117篇 |
2007年 | 94篇 |
2006年 | 80篇 |
2005年 | 46篇 |
2004年 | 45篇 |
2003年 | 45篇 |
2002年 | 21篇 |
2001年 | 14篇 |
2000年 | 6篇 |
1999年 | 4篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1992年 | 3篇 |
1990年 | 2篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1985年 | 1篇 |
排序方式: 共有2510条查询结果,搜索用时 15 毫秒
71.
RUTH DASSONNEVILLE 《European Journal of Political Research》2018,57(4):808-828
For a number of decades now, scholars have been indicating that ties between citizens and parties are eroding. As a consequence, electoral behaviour has become more volatile and also more unpredictable. The consequences of this process of change on parties’ strategic behaviour have, however, received little attention. In this article, the impact of dealignment on parties’ strategic behaviour is examined, with the focus being on the extent to which parties are responsive to the mean voter. The expectation of dealignment allowing parties ‘to move around more freely’ leads to the hypothesis that parties are more responsive in a context of dealignment. The analyses provide evidence that is in line with this expectation. Ideological responsiveness is conditioned by the level of volatility in the electorate. The conclusion to draw from these results is that dealignment, which profoundly affects voters’ behaviour, leads parties to become more responsive to the mean voter. 相似文献
72.
A Computational Framework for Age‐at‐Death Estimation from the Skeleton: Surface and Outline Analysis of 3D Laser Scans of the Adult Pubic Symphysis 下载免费PDF全文
Bridget F. B. Algee‐Hewitt Ph.D. Jieun Kim Ph.D. Dennis E. Slice Ph.D. 《Journal of forensic sciences》2017,62(6):1434-1444
In forensic anthropology, age‐at‐death estimation typically requires the macroscopic assessment of the skeletal indicator and its association with a phase or score. High subjectivity and error are the recognized disadvantages of this approach, creating a need for alternative tools that enable the objective and mathematically robust assessment of true chronological age. We describe, here, three fully computational, quantitative shape analysis methods and a combinatory approach that make use of three‐dimensional laser scans of the pubic symphysis. We report a novel age‐related shape measure, focusing on the changes observed in the ventral margin curvature, and refine two former methods, whose measures capture the flatness of the symphyseal surface. We show how we can decrease age‐estimation error and improve prior results by combining these outline and surface measures in two multivariate regression models. The presented models produce objective age‐estimates that are comparable to current practices with root‐mean‐square‐errors between 13.7 and 16.5 years. 相似文献
73.
74.
Commission of nonsexual crimes generally antedates officially recorded sexual offenses. In particular, burglary has been hypothesized to be a potential ‘stepping stone’ in the development of one's sexual criminal career in the same way that marijuana has often been considered a ‘gateway drug’ to more serious drug-related offenses. The present study examined the officially recorded criminal histories of 828 male sex offenders to determine the relevance of burglary in their criminal histories. One third of the men in the sample (n=281, 34%) had been charged at least once for burglary. These 281 men committed a total of 762 separate incidents of burglary. Offenders with at least one officially recorded charge for burglary (BSOs) were compared with those with no such charges (SOs). Next, the characteristics of each burglary were examined and four distinct types of burglary were identified: nonsexual, covertly sexual, overtly sexual, and combination burglary/rape. BSOs accrued twice as many charges as the SOs and were significantly more likely to have an earlier age of onset, a longer criminal career, more employment problems, elementary school problems, antisocial behavior, and substance abuse. 相似文献
75.
76.
Co‐parenting in a Highly Conflicted Separation/Divorce: Learning about Parents and their Experiences of Parenting Coordination,Legal, and Mental Health Interventions 下载免费PDF全文
Sixty high‐conflict separated/divorced co‐parents completed surveys investigating characteristics and dynamics (narcissism, empathy, conflict) that were examined in relation to co‐parenting style and parents' experiences of parenting coordination, legal, and mental health interventions. Study findings for this sample did not support common notions found in the literatures on parenting coordination and high‐conflict divorce that suggest these parents are often narcissistic or low in empathy. Findings pertaining to all high‐conflict participant experiences revealed the presence of common elements across aspects of practitioners and interventions with which they were both satisfied and dissatisfied. 相似文献
77.
Acute mesenteric venous thrombosis (MVT) is a rare, but life‐threatening medical phenomenon. MVT is normally characterized by insidious onset, with nonspecific signs and symptoms. A high index of clinical suspicion is required for diagnosis, and emergency surgery is necessary to optimize the chances of patient survival, especially in the people aged more than 70 years. Surprisingly, based on my review of the literature, no fatal acute MVT case has been reported in the forensic literature. All reported such cases have been documented in medical literature, and most of them have been associated with underlying risk factors for venous thrombosis, such as hypercoagulable state, certain cancers, and stasis of the blood flow. Here, I report the case of a sudden unexpected death due to extensive intestinal ischemia and infarction with massive abdominal hemorrhage caused by acute MVT in a 72‐year‐old man without known underlying risk factors. 相似文献
78.
Application of the Optimized Summed Scored Attributes Method to Sex Estimation in Asian Crania 下载免费PDF全文
The optimized summed scored attributes (OSSA) method was recently introduced and validated for nonmetric ancestry estimation between American Black and White individuals. The method proceeds by scoring, dichotomizing, and subsequently summing ordinal morphoscopic trait scores to maximize between‐group differences. This study tests the applicability of the OSSA method for sex estimation using five cranial traits given the methodological similarities between classifying sex and ancestry. A large sample of documented crania from Japan and Thailand (n = 744 males, 320 females) are used to develop a heuristically selected OSSA sectioning point of ≤1 separating males and females. This sectioning point is validated using a holdout sample of Japanese, Thai, and Filipino (n = 178 males, 82 females) individuals. The results indicate a general correct classification rate of 82% using all five traits, and 81% when excluding the mental eminence. Designating an OSSA score of 2 as indeterminate is recommended. 相似文献
79.
我国法律对性交易的打击虽非常严厉,但性交易却屡禁不止,并愈演愈烈.可见,我国现行的严禁主义存在问题.纵观我国历史大多数时期,性交易是合法的,并且性交易合法时期往往是社会环境比较宽松的时期,也往往是历史上的“盛世”之时.而性交易非法时期也往往是法律环境比较苛刻、社会控制比较严厉的时期.这样的时期里对性交易的管制往往就是严刑峻法,通过这样的管制也往往造成统治者不愿意看到的结果,并且最终都会放开对性交易的管制. 相似文献
80.
Valeria Santoro Ph.D. Piercarlo Lozito D.D.S. Antonio De Donno Ph.D. Francesco Introna M.D. 《Journal of forensic sciences》2011,56(1):224-228
Abstract: This study was based on a morphometric analysis of bite marks starting from the quantitative definition of the anterior teeth by the geometric acquisition of the “injuries,” using bite marks impressed on pig skin and plastic. Each mark was photographed and acquired. A dedicated program automatically supplied the values of the shape factors and the areas of the pattern geometric figures. The values obtained for the homologous samples were compared to the heterologous values. Statistical comparison was made of the sets by linear regression, determining the correlation coefficient and the determination coefficient for each value. Results showed only 4.8% and 2% of overlap between homologous and heterologous values. This study was carried out in attempting to quantitatively define the anterior teeth of the human dentition and the procedure described and the results obtained support the advantage of morphometric studies and computer‐aided programs in this study of bite marks. 相似文献