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   1105篇
  免费   55篇
各国政治   59篇
工人农民   71篇
世界政治   85篇
外交国际关系   92篇
法律   589篇
中国共产党   1篇
中国政治   18篇
政治理论   244篇
综合类   1篇
  2023年   11篇
  2022年   15篇
  2021年   39篇
  2020年   41篇
  2019年   50篇
  2018年   55篇
  2017年   54篇
  2016年   55篇
  2015年   39篇
  2014年   53篇
  2013年   184篇
  2012年   52篇
  2011年   46篇
  2010年   25篇
  2009年   39篇
  2008年   35篇
  2007年   52篇
  2006年   33篇
  2005年   17篇
  2004年   28篇
  2003年   22篇
  2002年   23篇
  2001年   18篇
  2000年   19篇
  1999年   10篇
  1998年   10篇
  1997年   10篇
  1996年   14篇
  1995年   12篇
  1994年   8篇
  1993年   9篇
  1992年   12篇
  1991年   8篇
  1990年   8篇
  1989年   6篇
  1988年   7篇
  1987年   3篇
  1985年   2篇
  1984年   8篇
  1983年   2篇
  1982年   3篇
  1981年   2篇
  1979年   2篇
  1978年   3篇
  1977年   4篇
  1971年   1篇
  1970年   1篇
  1969年   3篇
  1967年   1篇
  1966年   1篇
排序方式: 共有1160条查询结果,搜索用时 31 毫秒
841.
842.
Abstract

This study examined the relationship between psychopathic traits and moral development (moral judgement and empathy) in 85 Dutch male sex offenders between 13 and 23 years of age. Questions were asked about general life situations, sexual situations with morally relevant features, and questions about the offender's own abuse victim. A weak negative association was found between psychopathy and mature moral judgement, but only when questions involved the offender's own abuse victim. Weak to moderate negative associations were found between psychopathy and cognitive and affective empathy in general and sexual situations, but not in the own abuse victim situations. Further analysis revealed moderate negative associations between psychopathy and affective empathy in the own abuse victim situations, but only when an unfamiliar victim was involved. This is the first study, to our knowledge, showing that juvenile sex offenders with high levels of psychopathy have context-specific moral deficits, and that in this group both cognitive and affective empathy are related to psychopathy.  相似文献   
843.
Abstract

Wild animals have a special importance in Colombian rural contexts, where access to other sources of protein is limited. In rural communities, fishing and hunting provide food and generate income for household subsistence. In general, an important portion of the animals harvested is consumed within the family, and the remaining surplus is traded to acquire other subsistence foods and goods. Under the Colombian legal framework, harvesting animals from the wild (fishing and hunting) for subsistence purposes is allowed without restrictions on harvested amounts, if limited to family consumption. However, the trade of wild fish and wild meat, even in small amounts, is subject to a license, permit, or authorization. Regulations for the commercial use of wild fish, under the Ministry of Agriculture and Rural Development, are clear and simple to comply with. On the other hand, the commercial use of wild meat, regulated under the Ministry of Environment and Sustainable Development, remains illegal in practice, due to the complex requirements and the caveats in the regulatory framework. The reasons for these differences in the legal requirements to obtain a commercial permit for wild fish and wild meat are based on institutional differences and not on the sustainability of the practice. Considering the relevance of both hunting and fishing for rural livelihoods, it is important to question whether the current legal framework offers guarantees for the sustainable use of these resources in the future. Our analysis shows that the contrasting regulatory approaches between fish and wild meat use, as well as the discrepancies in the arguments to justify commercial fishing while prohibiting wild meat trade, have concrete consequences for local livelihoods. Moreover, instead of guaranteeing sustainability, bans on wild meat trade lead to more underground distribution channels and, potentially, also to increased pressure on fish stocks. Integrated management options need to be encouraged at the local level and promoted through integrated policy and regulatory frameworks for both resources and their habitats. Improved valuation and monitoring systems for subsistence and small-scale fish and wildmeat trade should also be integrated in the regulatory system to ensure sustainability for the future.  相似文献   
844.
Forensic examination of Windows Mobile devices and devices running its successor Windows Phone 7 remains relevant for the digital forensic community. In these devices, the file pim.vol is a Microsoft Embedded Database (EDB) volume that contains information related to contacts, appointments, call history, speed-dial settings and tasks. Current literature shows that analysis of the pim.vol file is less than optimal. We succeeded in reverse-engineering significant parts of the EDB volume format and this article presents our current understanding of the format. In addition we provide a mapping from internal column identifiers to human readable application-level property names for the pim.vol database. We implemented a parser and compared our results to the traditional approach using an emulator and the API provided by the Windows CE operating system. We were able to recover additional databases, additional properties per record and unallocated records.  相似文献   
845.
846.
It is estimated that on a single night in January 2009, there were 643,067 sheltered and unsheltered homeless people in America (The 2009 Annual Homeless Assessment Report to Congress 2010). The Obama administration recently published “Opening Doors,” the first federal plan to prevent and end homelessness. We argue that the strategy is based on a partial evidence base that raises questions about the potential of the strategy to meet its goals. In order to inform future iterations of the plan, data from 682 young adults (aged 18–27 years old; mean = 22.13 years old) who participated in the National Longitudinal Study of Adolescent Health were used to examine whether there is a typologys of young adults with a history of homelessness; one of the priority groups in the strategy. A priori selected variables previously associated with lifetime homelessness in non-random samples were mapped to survey items. Data were analyzed using cluster analysis. Comparisons were conducted with a randomly selected “never-homeless” sample from the same study. The cluster analysis revealed four subgroups. It appears that the Federal Plan currently prioritizes homelessness risk factors associated with two subgroups: the Young Offenders subgroup and the Abused Depressed subgroup. The needs of two other subgroups are not fully addressed: the Childhood Adversity subgroup and the Vulnerable African-American subgroup. The authors offer guidance on future directions for homelessness policy relevant to young adults.  相似文献   
847.
Territorial autonomy is one aspect of power-sharing in multi-ethnic societies. Nevertheless, the multi-ethnic countries of Central and Eastern Europe are still among the most centralised in the European Union. This article analyses the failure of any attempts to establish (symmetric) federalism or (asymmetric) autonomy, creating self-governed regions by the Hungarian minorities in Romania and Slovakia. The analysis focuses on the positions of the main parties of the ethnic majorities and the Hungarian minority parties in the two countries. In both cases, the parties representing the Hungarian minorities have favoured territorial autonomy along ethnic lines, but this demand has been rejected by the parties of the ethnic majority. Against the historical legacy of unstable borders, the parties of the ethnic majority argue that territorial autonomy or federalisation might be a first step for a revisionist agenda and separatism. Instead, supported by the European integration, the parties have been able to agree on decentralisation as a half-hearted compromise.  相似文献   
848.
849.
850.
A highly sensitive screening method based on high performance liquid chromatography atmospheric pressure ionization mass spectrometry (HPLC-API-MS) has been developed for the analysis of 21 nitroaromatic, nitramine and nitrate ester explosives, which include the explosives most commonly encountered in forensic science. Two atmospheric pressure ionization (API) methods, atmospheric pressure chemical ionization (APCI) and electrospray ionization (ESI), and various experimental conditions have been applied to allow for the detection of all 21 explosive compounds. The limit of detection (LOD) in the full-scan mode has been found to be 0.012-1.2 ng on column for the screening of most explosives investigated. For nitrobenzene, an LOD of 10 ng was found with the APCI method in the negative mode. Although the detection of nitrobenzene, 2-, 3-, and 4-nitrotoluene is hindered by the difficult ionization of these compounds, we have found that by forming an adduct with glycine, LOD values in the range of 3-16 ng on column can be achieved. Compared with previous screening methods with thermospray ionization, the API method has distinct advantages, including simplicity and stability of the method applied, an extended screening range and a low detection limit for the explosives studied.  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