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   911篇
  免费   35篇
各国政治   75篇
工人农民   50篇
世界政治   112篇
外交国际关系   77篇
法律   394篇
中国政治   3篇
政治理论   224篇
综合类   11篇
  2023年   14篇
  2022年   13篇
  2021年   20篇
  2020年   41篇
  2019年   30篇
  2018年   62篇
  2017年   45篇
  2016年   46篇
  2015年   34篇
  2014年   33篇
  2013年   148篇
  2012年   32篇
  2011年   23篇
  2010年   30篇
  2009年   25篇
  2008年   26篇
  2007年   36篇
  2006年   29篇
  2005年   21篇
  2004年   19篇
  2003年   25篇
  2002年   20篇
  2001年   18篇
  2000年   11篇
  1999年   13篇
  1998年   12篇
  1997年   11篇
  1996年   7篇
  1995年   4篇
  1994年   6篇
  1993年   10篇
  1992年   3篇
  1991年   4篇
  1990年   3篇
  1989年   3篇
  1988年   8篇
  1987年   11篇
  1986年   2篇
  1985年   5篇
  1984年   8篇
  1982年   3篇
  1980年   2篇
  1979年   4篇
  1978年   5篇
  1977年   2篇
  1975年   3篇
  1973年   4篇
  1972年   3篇
  1967年   3篇
  1965年   1篇
排序方式: 共有946条查询结果,搜索用时 15 毫秒
111.
Knowledge regarding the succession patterns of insects that visit carcasses as well as the other arthropod that colonise them and analysis of the parameters that are associated with larvae allow calculation of the minimum postmortem interval (PMI). This information is obtained from experiments carried out under specific geoclimatic conditions, which determine their application in forensic environments under similar conditions. The field study presented here is the first in Chile to analyse the decomposition process of pig carcasses and the associated succession of insects, colonising species and parameters related to larval masses. All of the larvae obtained from daily samples were measured (in mm), and their mean, range, standard deviation and stage of development (instars) were determined. The carcasses reached the dry remains stage in only 11 days. Seven species of Diptera visited the carcass during the process, but only two species colonised it by means of egg deposition followed by development of larvae: Cochliomyia macellaria (Fabricius) and Lucilia sericata (Meigen) (Diptera: Calliphoridae), which exhibited a duration of the development cycle from egg to adult of 21 days. The collected Coleoptera correspond to five predator species (Staphilinidae and Histeridae). From the results of this study, it can be concluded that only some of the insect species present in this region can provide information that can be used in forensic entomology and that analysis of larval masses of colonising species can be a valuable tool for determining the PMI(min) in this region of Chile.  相似文献   
112.
Abstract

This paper examines the factors influencing the support for Russia’s Ukraine policy. Western sanctions imposed on Russia have crippled its economy and the general well-being of its people. However, support for Moscow’s Ukraine policy remains firm among the Russian population, who believe that the West has malevolent intentions toward Russia. The Russian elite has skillfully utilized identity politics for national consolidation and to mobilize support for its Ukraine policy by manipulating Russian history, beliefs, and worldviews. Russians see themselves as righteous people who are highly capable of dealing with difficulties and certainly as winners in the conflict with the West.  相似文献   
113.
Understanding the conflict between pro- and anti-Rhodesian government parliamentarians is the only way to understand how and why Australia struggled to formulate a coherent Rhodesia policy. It reveals the extent to which Malcolm Fraser had to struggle against his own party in this matter and adds needed nuance to this period. Fraser's opinion that Rhodesia was a racist and immoral project caused a schism in the Coalition parties. Despite Fraser's open antipathy towards Rhodesia, Rhodesia's interests in Australia were largely safeguarded. This reflects the reality that the Liberal and National Country Parties contained sizeable blocs of parliamentarians who openly and publicly saw Rhodesia as a fraternal country, not a dangerous pariah. They did not hold these beliefs passively and actively sought to resist any moves made by Fraser to damage Rhodesia and its interests. By following the development of Fraser's Rhodesia policy in the late 1970s the power of Rhodesia's allies in the Australian parliament becomes clear. Opposing Rhodesia was touted by Fraser as one of the greatest achievements of his government, yet the issue was divisive and caused bitter infighting.  相似文献   
114.
ABSTRACT

Perceptions of threat from Russia’s military activities in Ukraine and President Trump’s critical attitude towards NATO have put the idea of a common European army on the agenda of European politics. Do these strategic threat perceptions also influence public support for the creation of a common European army? Previous research has largely overlooked strategic threat perceptions as individual-level determinants of public support for a common European army. This article explores the empirical relationship between strategic threat perceptions and support for a common European army at the individual level of analysis with representative German survey data from 2018. The multivariate analysis shows that perceiving Russia’s military activities in Ukraine as a threat to Germany’s security, and U.S. foreign and security policy as a threat to the cohesion of NATO significantly increases support for the creation of a common European army, even when the influence of numerous other determinants is controlled for. The findings highlight the importance of considering strategic threat perceptions in future analyses of public opinion on European defence cooperation and integration.  相似文献   
115.
There has been a long-standing discussion since the 1980s about the question whether new production models harbor a potential for extended employee participation and involvement, in most cases with disillusioning results. This paper is concerned with so called “agile methods”, which play an important part in the area of knowledge work in the course of the digital transformation. On the basis of two case studies from software development and industrial R&D, the paper examines the concrete implementation of these methods and the employees’ perspective upon them and their consequences. The result is that agile methods present a potential for extended employee participation and involvement; however, the realization of this potential depends on the concrete way how the agile concept of “empowerment” is implemented.  相似文献   
116.
117.
How do market actors in the contemporary economy make decisions when they are uncertain of the value of what is being traded? To answer this question, this paper analyses the changing temporal and spatial orientation of economic valuations in increasingly digitalized economies, in which markets can no longer be understood as locally bound and closed sites of valuation and exchange. Drawing on ethnographic material from the fishing industry, the paper shows how digital tracking technologies link and synchronize auction markets with real-time information on fishing activities. Hence, ‘scopic media’ such as chart plotters and computer screens are not only deployed by skippers to monitor one another, but are also used as valuation devices that recontextualize local knowledge for the purpose of coping with economic uncertainty. As a consequence of this panoptic valuation regime, fishermen control their virtual identities by disciplining harvesting practices according to their buyers’ expectations.  相似文献   
118.
This article challenges traditional accounts of the 1946 Cold War Crisis in Iran by moving beyond Soviet–American confrontation to focus on British policy. In contrast to the United States, Britain was a major stake-holding power in Iran due to the valuable holdings of the Anglo–Iranian Oil Company (AIOC). By comparing the reactions of the AIOC and Foreign Office, continuity between the events of the 1946 Crisis and later developments in the Mosaddegh premiership becomes apparent. Soviet interference in Azerbaijan prompted great concern from representatives in Iran, but the central Foreign Office pursued a more cautious policy. Only concerns relating to the growth of domestic Iranian communism in the form of the Tudeh Party and the threat this entailed to the British concession prompted the Foreign Office and AIOC to take measures rendering them partially complicit in the internationalization of Iranian politics, setting an important precedent for future action. This article evaluates the policy-making process and its impact on Anglo–Iranian relations by utilizing records from the UK National Archives, British Petroleum Archive and diplomatic personal papers.  相似文献   
119.
Entomological protocols for aging blowfly (Diptera: Calliphoridae) larvae to estimate the time of colonization (TOC) are commonly used to assist in death investigations. While the methodologies for analyzing fly larvae differ, most rely on light microscopy, genetic analysis, or, more rarely, electron microscopy. This pilot study sought to improve resolution of larval stage in the forensically important blowfly Chrysomya rufifacies using high‐content fluorescence microscopy and biochemical measures of developmental marker proteins. We established fixation and mounting protocols, defined a set of measurable morphometric criteria and captured developmental transitions of 2nd instar to 3rd instar using both fluorescence microscopy and anti‐ecdysone receptor Western blot analysis. The data show that these instars can be distinguished on the basis of robust, nonbleaching, autofluorescence of larval posterior spiracles. High‐content imaging techniques using confocal microscopy, combined with morphometric and biochemical techniques, may therefore aid forensic entomologists in estimating TOC.  相似文献   
120.
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