全文获取类型
收费全文 | 2991篇 |
免费 | 112篇 |
专业分类
各国政治 | 231篇 |
工人农民 | 96篇 |
世界政治 | 300篇 |
外交国际关系 | 235篇 |
法律 | 1146篇 |
中国政治 | 13篇 |
政治理论 | 1006篇 |
综合类 | 76篇 |
出版年
2023年 | 10篇 |
2022年 | 10篇 |
2021年 | 24篇 |
2020年 | 46篇 |
2019年 | 57篇 |
2018年 | 103篇 |
2017年 | 92篇 |
2016年 | 109篇 |
2015年 | 63篇 |
2014年 | 85篇 |
2013年 | 477篇 |
2012年 | 98篇 |
2011年 | 99篇 |
2010年 | 74篇 |
2009年 | 84篇 |
2008年 | 95篇 |
2007年 | 116篇 |
2006年 | 79篇 |
2005年 | 106篇 |
2004年 | 99篇 |
2003年 | 75篇 |
2002年 | 85篇 |
2001年 | 75篇 |
2000年 | 74篇 |
1999年 | 60篇 |
1998年 | 49篇 |
1997年 | 49篇 |
1996年 | 52篇 |
1995年 | 44篇 |
1994年 | 41篇 |
1993年 | 36篇 |
1992年 | 43篇 |
1991年 | 49篇 |
1990年 | 45篇 |
1989年 | 41篇 |
1988年 | 34篇 |
1987年 | 20篇 |
1986年 | 24篇 |
1985年 | 26篇 |
1984年 | 24篇 |
1983年 | 22篇 |
1982年 | 32篇 |
1981年 | 38篇 |
1980年 | 28篇 |
1979年 | 13篇 |
1978年 | 15篇 |
1977年 | 11篇 |
1975年 | 12篇 |
1974年 | 12篇 |
1967年 | 7篇 |
排序方式: 共有3103条查询结果,搜索用时 0 毫秒
791.
Charles L. Gutshall David P. Hampton Jr. Paul C. Stein Thomas J. Broxtermann 《Police Practice and Research》2017,18(5):463-477
The occupational stress of police officers, and its’ effect on working memory and other psychological and behavioral factors over a two-week work period have been investigated. Cognitive performance and stress levels were examined at pre and post work cycles by using a memory test and several self-reporting surveys, each designed for a specific purpose and to gauge a particular set of behaviors and personality traits. The police officers were assigned to patrol duties at the time of the investigation and placed into three groups based on years of service (1–20 years). The results of the investigation identified a deficit in working memory in Junior, Veteran, and Senior Officers, based on the Ray Osterreith Complex Figure Scores at Baseline (pre-stress) vs. Test Day (post-stress). The other survey tools measuring stress impact on personality and behavior, did not demonstrate any statistical differences in the responding groups of officers in their survey performances. 相似文献
792.
793.
Paul Brotherton Phillip Endicott Ross Barnett Alan Cooper 《Forensic Science International: Genetics Supplement Series》2008,1(1):19-21
High levels of non-authentic sequence data can be generated by traditional PCR-based methodologies when DNA is damaged, template numbers are small and/or the target amplification size too large. We therefore present an alternate methodology based on single primer extension (SPEX) amplification; that places no pre-defined size constraints on amplification and interacts with only one of the DNA strands at the target locus. 相似文献
794.
795.
The strategic value of new university technology and its impact on exclusivity of licensing transactions: An empirical study 总被引:1,自引:0,他引:1
Commercialization of new university technology within the new product development process is an important tool by which established
firms can expand their innovative capabilities. The strategic importance of the university technology to the firm, however,
can vary considerably. An exclusivity agreement is a useful tool to protect the firm’s investment and help ensure that value
is appropriated through the commercialization process. An empirical study of 66 technology transfer projects in the information
and communications technology industry reveals that licensing transactions are usually secured by some form of exclusivity
agreements when the product innovation enabled by the new university technology is new-to-the-firm or new-to-the-market and
the firm’s perception of the strategic value of the new technologies is high.
相似文献
796.
797.
Paul B. Demitriades 《Canadian public administration. Administration publique du Canada》2005,48(1):142-143
Richard A. Clarke,Against All Enemies: Inside America's War on Terror. New York: Free Press, 2004. Pp. xiii, 304, index. National Commission on Terrorist Attacks Upon the U.S.,The 9/11 Commission Report, authorized edition. New York: W.W. Norton & Co., [2004]. Pp. xviii, 567, bibliographical references. 相似文献
798.
799.
Recent studies of the career diplomat and distinguished historian George F. Kennan, and particularly a little noted intellectual
biography by Lee Congdon, reveal a side of this figure that has often been neglected. Despite his reputation as a critic of
the Cold War, Kennan was in fact a strong anti-Communist and profoundly conservative thinker. His conventional defenders have
stressed his displeasure with vocal anti-Communism in order to create an image of him that is consistent with their left-of-center
politics. This has come at the expense of playing down unfashionable opinions that Kennan expressed on a wide range of issues.
Many of his opinions, which he viewed as eminently “realistic,” would have been unacceptable to his mainstream admirers even
fifty years ago, were it not for his stands on the Cold War and for certain isolated statements drawn from his post-World
War Two speeches mentioning racial inequality and industrial waste. What is now being published on Kennan’s life, however,
provides a more balanced picture. Congdon and John Lukacs have both offered this necessary corrective to earlier views about
their subject in recent biographical studies. These and other commentators are now highlighting the anti-modernist perspective
from which he viewed and criticized the twentieth century. 相似文献
800.
美国隐私权项目与Paul M.Schwartz教授合作形成的《全球信息保密管理:在网络环境下的跨境信息流》报告,基于一系列结构化自我报告案例研究,介绍了六家公司计划及实施跨国个人信息保护的方案,展示了私人企业中国际信息安全的巨大变革,集中表现为三个方面:规模的改变,信息处理的转变,信息管理的转变。该报告提出,要致力于将案例研究与相关信息保护法政策研究有机结合,以寻求新的解决方案,其关键在于重视各项法规的具体实施,以及如何保证强有力的执行。 相似文献