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   645篇
  免费   27篇
各国政治   40篇
工人农民   56篇
世界政治   141篇
外交国际关系   51篇
法律   249篇
中国政治   9篇
政治理论   125篇
综合类   1篇
  2023年   3篇
  2022年   5篇
  2021年   2篇
  2020年   16篇
  2019年   17篇
  2018年   34篇
  2017年   31篇
  2016年   19篇
  2015年   16篇
  2014年   25篇
  2013年   82篇
  2012年   27篇
  2011年   22篇
  2010年   22篇
  2009年   17篇
  2008年   30篇
  2007年   33篇
  2006年   14篇
  2005年   30篇
  2004年   28篇
  2003年   25篇
  2002年   23篇
  2001年   16篇
  2000年   16篇
  1999年   11篇
  1998年   8篇
  1997年   6篇
  1996年   2篇
  1995年   7篇
  1994年   6篇
  1993年   5篇
  1992年   8篇
  1991年   4篇
  1990年   2篇
  1989年   3篇
  1987年   7篇
  1986年   4篇
  1985年   4篇
  1984年   5篇
  1983年   6篇
  1982年   5篇
  1981年   2篇
  1980年   3篇
  1979年   2篇
  1978年   3篇
  1977年   3篇
  1975年   3篇
  1967年   2篇
  1966年   2篇
  1964年   1篇
排序方式: 共有672条查询结果,搜索用时 15 毫秒
71.
72.
In mortality research, much attention has been paid to the strong geographical differentials in mortality levels and in modern mortality decline, as the analysis of this geographical differentiation might hold the key to explaining the determinants of mortality change. The use of historical cause-specific mortality data has proved a challenging, although very insightful, means to this end. The four contributions to this special issue focus on cause-specific mortality in the past, both to reassess older data using new insights and to challenge existing insights by using new data and methods. These papers, of which earlier versions were presented during the thirty-eighth Social Science History Association (SSHA) Meeting in Chicago, 21–24 November 2013, explore mortality at different stages of the life course, ranging from early infancy to old age. Moreover, each paper revolves around a different group of causes of death. Although the papers are in many ways rather different, together they demonstrate how different data, theoretical frameworks and methodologies can push the boundaries of research into the trends and determinants of historical mortality patterns.  相似文献   
73.
Disasters such as flash flooding, mass shootings, and train and airplane accidents involving large numbers of victims produce significant opportunity for research in the biosciences. This opportunity exists in the extreme tails of life events, however, during which decisions about life and death, valuing and foregoing, speed and patience, trust and distrust, are tested simultaneously and abundantly. The press and urgency of these scenarios may also challenge the ability of researchers to comprehensively deliver information about the purposes of a study, risks, benefits, and alternatives. Under these circumstances, we argue that acquiring consent for the immediate use of data that are not time sensitive represents a gap in the protection of human study participants. In response, we offer a two-tiered model of consent that allows for data collected in real-time to be held in escrow until the acute post-disaster window has closed. Such a model not only respects the fundamental tenet of consent in research, but also enables such research to take place in an ethically defensible manner.  相似文献   
74.
This note focuses on the best means for achieving civilian control of border security in the Balkans. Civilian control may be achieved through societal control (as in civilian complaint reviews) but such procedures require an established political culture that does not yet exist in the region. Civilian control also requires a degree of technical expertise, which is not always available among international officials, let alone local communities.  相似文献   
75.
The use of Internet filters in public classrooms in the USA has been intensely debated, both in terms of its effectiveness and legality. The debate pits concerns to protect students from indecent material against issues of unconstitutional censorship. This paper examines the legal issues addressed in various rulings by the US Supreme Court pertinent to issues raised in the debate over the constitutionality of filtering in the classroom. The rulings and opinions offer valuable insights into the legal issues raised in this debate.  相似文献   
76.
77.
State and federal prohibitions of referral fees have long plagued the health care sector because their broadly worded provisions threaten established and socially valuable business arrangements. Congress has recently instructed the Department of Health and Human Services to issue regulations that clarify the scope of the most threatening of these prohibitions, the Medicare and Medicaid felony referral fee statute. This article examines three possible analytical models for imposing a limiting construction on referral fee statutes by testing the models against three beneficial practices that the statute jeopardizes: physician recruitment, fee discounting, and efficiency bonuses. The article recommends primary reliance on an earned/unearned analysis that detects a prohibited referral fee by asking whether the fee is fully earned by legitimate, nonreferral services.  相似文献   
78.
79.
80.
The field-network evaluation studies (FNES) approach to policy evaluation research seeks to overcome deficiencies of small-sample case study method and of the large-sample survey research approach. Methodologically, FNES uses many of the familiar techniques of both these approaches interviews, data collection and analysis, limited sampling, field observation, and document analysis. The crucial difference is sample size. The FNES approach using a middle-range sample of 50 to 60 research sites has the advantages of the case study method in being able to provide an in depth account of a program and how it operates, and is sufficiently flexible to permit a shift in the analytical framework as the research proceeds thus overcoming the inflexibility of the instruments of survey research.
Seven major studies employing the FNES approach have been carried out or are underway in the United States of America. The principal components of the methodology are a network of university-based field associates and a central management group. The field associates collect the information and the data using a uniform analytical framework and reporting form. The central staff aggregates these analyses into a single report that cuts across the sample. This approach and the use of a middle-range sample make it possible to draw generalizable conclusions based on the national experience, and also provide sufficient detail to differentiate policy impacts among the sample jurisdictions.  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