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   8984篇
  免费   204篇
各国政治   669篇
工人农民   342篇
世界政治   524篇
外交国际关系   357篇
法律   5520篇
中国共产党   7篇
中国政治   52篇
政治理论   1659篇
综合类   58篇
  2020年   109篇
  2019年   125篇
  2018年   218篇
  2017年   233篇
  2016年   256篇
  2015年   197篇
  2014年   189篇
  2013年   923篇
  2012年   211篇
  2011年   215篇
  2010年   208篇
  2009年   221篇
  2008年   286篇
  2007年   309篇
  2006年   331篇
  2005年   218篇
  2004年   211篇
  2003年   213篇
  2002年   194篇
  2001年   323篇
  2000年   281篇
  1999年   248篇
  1998年   111篇
  1997年   88篇
  1996年   80篇
  1995年   69篇
  1994年   85篇
  1993年   69篇
  1992年   127篇
  1991年   169篇
  1990年   163篇
  1989年   152篇
  1988年   158篇
  1987年   172篇
  1986年   167篇
  1985年   156篇
  1984年   133篇
  1983年   127篇
  1982年   84篇
  1981年   99篇
  1980年   70篇
  1979年   131篇
  1978年   89篇
  1977年   74篇
  1976年   56篇
  1975年   81篇
  1974年   86篇
  1973年   83篇
  1972年   58篇
  1971年   57篇
排序方式: 共有9188条查询结果,搜索用时 15 毫秒
201.
Using panel data for 143 countries over the period 1973–2002, this paper empirically analyzes the influence of US aid on voting patterns in the UN General Assembly. We use disaggregated aid data to account for the fact that various forms of aid may differ in their ability to induce political support by recipients. We obtain strong evidence that US aid buys voting compliance in the Assembly. More specifically, our results suggest that general budget support and grants are the major aid categories by which recipients have been induced to vote in line with the United States. When replicating the analysis for other G7 donors, no comparable patterns emerge.  相似文献   
202.
While there is a growing academic literature about mail-in ballots, there has been no serious academic research to date on overseas voters, even though the counting of overseas military ballots figured into the 2000 presidential election controversy. The participation of nearly 4 million overseas voters, both civilian and military, is governed by the Uniformed and Overseas Citizens Absentee Voting Act. The authors examine the reported perceptions of military and nonmilitary voters covered by this legislation using two surveys funded by the U.S. Election Assistance Commission, focusing on their perceptions of electronic means of transmitting voting materials. The authors find that civilian overseas citizens have a harder time registering and voting than military overseas citizens; that the key factor is the timely transmission of voting materials; and that, despite privacy concerns, electronic transmission of voting materials is viewed favorably.  相似文献   
203.
204.
We investigate the role of Congress in the growth of federal public expenditure since 1930, building on the work of Kau and Rubin (Public Choice, 113:389–402, 2002). The model incorporates majority party strength and the extent of party control of Congress in addition to the median ideological position of elected representatives. We first provide estimates of the relative importance of the state of Congress and of trending supply and demand-side economic factors in the evolution of federal spending. The resulting models are then used to simulate the consequences of the radical and historically unprecedented shift to the right of Congress in 1994/95.  相似文献   
205.
Lee H. Igel 《Society》2008,45(6):512-514
Most people mistakenly assume that health care first became a major political issue in 1945 because President Harry S. Truman’s special address to Congress on Nov. 19 of that year marked the first time a sitting president publicly endorsed a national health-care program. But the question of whether—or to what extent—it is the responsibility of government to subsidize health care for its citizens has been around for a much longer amount of time. Now that health care has become a major focus of domestic political debate, especially in light of the impending presidential election, this article, modified from an entry in the forthcoming Encyclopedia of Campaigns, Elections, & Electoral Behavior (Sage Publications), serves to inform the reader of the origins and history of health care as a campaign issue.
Lee H. IgelEmail:
  相似文献   
206.
The flow of foreign direct investment into developing countries varies greatly across countries and over time. The political factors that affect these flows are not well understood. Focusing on the relationship between trade and investment, we argue that international trade agreements—GATT/WTO and preferential trade agreements (PTAs)—provide mechanisms for making commitments to foreign investors about the treatment of their assets, thus reassuring investors and increasing investment. These international commitments are more credible than domestic policy choices, because reneging on them is more costly. Statistical analyses for 122 developing countries from 1970 to 2000 support this argument. Developing countries that belong to the WTO and participate in more PTAs experience greater FDI inflows than otherwise, controlling for many factors including domestic policy preferences and taking into account possible endogeneity. Joining international trade agreements allows developing countries to attract more FDI and thus increase economic growth.  相似文献   
207.
The environmental Kuznets curve (EKC) hypothesis conjectures a nonlinear relationship between pollution and economic growth, such that pollution per capita initially increases as countries economically develop, but then reaches a maximum point before ultimately declining. Much of the EKC literature has focused on testing this basic hypothesis and, in studies that find evidence of an EKC, estimating the “turning point” level of development at which the per capita pollution‐growth relationship changes sign. This approach has not emphasized the policy relevance of specification issues or the potential role of policy variables. This research explores a modified EKC specification which conditions the pollution‐growth relationship on a country's level of debt and degree of democratization. These variables turn out to be significant, implying that different political and economic contexts can shift EKCs and their turning points. These findings suggest that policies to relieve debt burdens and institute political reform, in addition to their usual justifications, also could be used as a strategy to reduce carbon emissions from developing countries. © 2008 by the Association for Public Policy Analysis and Management.  相似文献   
208.
Interpreting a myocardial inflammation as causal, contributory or as of no significance at all in the cause of death can be challenging, especially in cases where other pathologic and/or medico-legal findings are also present. To further evaluate the significance of myocardial inflammation as a cause of death we performed a retrospective cohort study of forensic and clinical autopsy cases. We revised the spectrum of histological inflammatory parameters in the myocardium of 79 adult autopsy cases and related these to the reported cause of death. Myocardial slides were reviewed for the distribution and intensity of inflammatory cell infiltrations, the predominant inflammatory cell type, and the presence of inflammation-associated myocyte injury, fibrosis, edema and hemorrhage. Next, the cases were divided over three groups, based on the reported cause of death. Group 1 (n = 27) consisted of all individuals with an obvious unnatural cause of death. Group 2 (n = 29) included all individuals in which myocarditis was interpreted to be one out of more possible causes of death. Group 3 (n = 23) consisted of all individuals in which myocarditis was reported to be the only significant finding at autopsy, and no other cause of death was found. Systematic application of our histological parameters showed that only a diffuse increase of inflammatory cells could discriminate between an incidental presence of inflammation (Group 1) or a potentially significant one (Groups 2 and 3). No other histological parameter showed significant differences between the groups. Our results suggest that generally used histological parameters are often insufficient to differentiate an incidental myocarditis from a (potentially) significant one.  相似文献   
209.
Dental development can be used to estimate age for forensic purposes. However, most of the currently available methods are less reliable for the Indonesian population due to population variability. This study presents a new method and evaluates other methods that utilize dental development to estimate the age of Indonesian people. Panoramic radiographs of 304 young Indonesian people aged 5–23 years old were analysed for deciduous tooth root resorption, permanent tooth calcification, and eruption. The extent of tooth root resorption was determined based on AlQahtani’s modified Moorrees et al. method. Tooth calcification was classified based on a modified Demirjian et al. method. Tooth eruption was evaluated based on AlQahtani’s modified Bengston system. The sequence of tooth root resorption, and permanent tooth calcification and eruption were grouped into 19 age categories (from 5–23 years old) in an atlas. The differences between males and females, between maxillary and mandibular teeth, and between right and left teeth were also analysed. There were minimal significant differences of tooth development between males and females, and between the right and left teeth (P > 0.05), while the maxillary and mandibular dental development was significantly different (P < 0.05). The newly developed atlas showed the development of the right side of maxillary and mandibular tooth of combined sex of Indonesian population. Another 34 panoramic radiographs of known-age and sex individuals from Indonesia were assessed using the newly developed Atlas of Dental Development in the Indonesian Population, Ubelaker’s Dental Development Chart, The London Atlas of Human Tooth Development and Eruption by AlQahtani, and the Age Estimation Guide-Modern Australia population by Blenkin-Taylor. Accuracy was assessed by comparing estimated age to actual chronological age using the Bland-Altmand test. Results show that the smallest range of error was found in the Atlas of Dental Development in the Indonesian Population (−0.969 to 1.210 years), followed by The London Atlas of Human Tooth Development and Eruption by AlQahtani (−2.013 to 1.990 years), the Age Estimation Guide-Modern Australia population by Blenkin-Taylor (−2.495 to 2.598 years), and the Dental Development Chart by Ubelaker (−2.960 to 3.289 years). These findings show that the Atlas of Dental Development constructed in this study performs better than the other three methods and presents greater accuracy of age estimation in the Indonesian population.

Key points

  • Dental development such as deciduous tooth root resorption, permanent tooth calcification, and tooth eruption can be used to estimate age for forensic purposes.
  • The development of the teeth are influenced by genetic, ethnicity, and sex, therefore an age estimation method must be constructed based on the same population.
  • There were minimal significant differences in tooth development between male and female, and between right and left teeth, but there was significant difference between maxillary and mandibular teeth.
  • The Atlas of Dental Development in the Indonesian Population constructed in this study allowed more accurate age estimation of the Indonesian sample than the other methods tested.
Supplemental data for this article are available online at https://doi.org/10.1080/20961790.2021.1886648.  相似文献   
210.
The National Institute of Forensic Toxicology, Oslo, receives blood and urine samples from all Norwegian drivers apprehended on suspicion of driving under the influence of alcohol or drugs. In 1983 we received samples from 1446 drug-suspected drivers, out of which 445 underwent toxicological analysis. The drugs found most frequently were tetrahydrocannabinol (THC) (n = 199), diazepam (n = 166) and amphetamine (n = 102). A cautious interpretation of the data indicate that about 200 of the 445 subjects selected for toxicological analysis drove under severe influence of drugs. Because of the high percentage of submitted cases not analysed for drugs, this figure represents a minimum estimate. Compared with the results from 1978, we found a several-fold increase in detections of THC and amphetamine in 1983. The number of diazepam detections did not increase in a similar way, but we estimated that the diazepam detections would have increased 3-fold if we had analysed as frequent for this drug in 1983 as in 1978.  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