全文获取类型
收费全文 | 7788篇 |
免费 | 486篇 |
专业分类
各国政治 | 414篇 |
工人农民 | 224篇 |
世界政治 | 549篇 |
外交国际关系 | 244篇 |
法律 | 5292篇 |
中国政治 | 67篇 |
政治理论 | 1449篇 |
综合类 | 35篇 |
出版年
2020年 | 157篇 |
2019年 | 169篇 |
2018年 | 177篇 |
2017年 | 208篇 |
2016年 | 213篇 |
2015年 | 201篇 |
2014年 | 196篇 |
2013年 | 790篇 |
2012年 | 186篇 |
2011年 | 186篇 |
2010年 | 228篇 |
2009年 | 245篇 |
2008年 | 194篇 |
2007年 | 177篇 |
2006年 | 187篇 |
2005年 | 177篇 |
2004年 | 183篇 |
2003年 | 174篇 |
2002年 | 147篇 |
2001年 | 311篇 |
2000年 | 255篇 |
1999年 | 235篇 |
1998年 | 105篇 |
1997年 | 75篇 |
1996年 | 81篇 |
1995年 | 87篇 |
1994年 | 102篇 |
1993年 | 101篇 |
1992年 | 164篇 |
1991年 | 166篇 |
1990年 | 161篇 |
1989年 | 167篇 |
1988年 | 134篇 |
1987年 | 154篇 |
1986年 | 142篇 |
1985年 | 153篇 |
1984年 | 118篇 |
1983年 | 128篇 |
1982年 | 94篇 |
1981年 | 84篇 |
1980年 | 66篇 |
1979年 | 121篇 |
1978年 | 78篇 |
1977年 | 69篇 |
1976年 | 63篇 |
1975年 | 55篇 |
1974年 | 60篇 |
1973年 | 60篇 |
1972年 | 52篇 |
1969年 | 45篇 |
排序方式: 共有8274条查询结果,搜索用时 15 毫秒
51.
DAVID WEISBURD LAURA A. WYCKOFF JUSTIN READY JOHN E. ECK JOSHUA C. HINKLE FRANK GAJEWSKI 《犯罪学》2006,44(3):549-592
Recent studies point to the potential theoretical and practical benefits of focusing police resources on crime hot spots. However, many scholars have noted that such approaches risk displacing crime or disorder to other places where programs are not in place. Although much attention has been paid to the idea of displacement, methodological problems associated with measuring it have often been overlooked. We try to fill these gaps in measurement and understanding of displacement and the related phenomenon of diffusion of crime control benefits. Our main focus is on immediate spatial displacement or diffusion of crime to areas near the targeted sites of an intervention. Do focused crime prevention efforts at places simply result in a movement of offenders to areas nearby targeted sites—“do they simply move crime around the corner”? Or, conversely, will a crime prevention effort focusing on specific places lead to improvement in areas nearby—what has come to be termed a diffusion of crime control benefits? Our data are drawn from a controlled study of displacement and diffusion in Jersey City, New Jersey. Two sites with substantial street‐level crime and disorder were targeted and carefully monitored during an experimental period. Two neighboring areas were selected as “catchment areas” from which to assess immediate spatial displacement or diffusion. Intensive police interventions were applied to each target site but not to the catchment areas. More than 6,000 20‐minute social observations were conducted in the target and catchment areas. They were supplemented by interviews and ethnographic field observations. Our findings indicate that, at least for crime markets involving drugs and prostitution, crime does not simply move around the corner. Indeed, this study supports the position that the most likely outcome of such focused crime prevention efforts is a diffusion of crime control benefits to nearby areas. 相似文献
52.
53.
Know-Where: Geographies of Knowledge of World Politics 总被引:1,自引:1,他引:0
JOHN AGNEW 《International Political Sociology》2007,1(2):138-148
The problem of "foundations" is a crucial one for any field, particularly perhaps one with as varied a possible repertoire of elementary sources as the study of world politics. In this paper, I draw attention to how some different ways of thinking about where knowledge is produced and how it circulates can be used to inform understanding about geographies of knowledge of world politics. Such geographies, however, are not ends in themselves. The point is to understand the ontological bases of knowing from perspectives that do not privilege a singular history of knowledge associated with a specific world region or of conceptions of knowledge that implicitly or explicitly presume their self-evident universality. In other words, we need to move beyond the all-too-conventional repertoires of relativism and positivism in understanding the bases to knowing about world politics/international relations. The paper suggests some ways forward, which should now be the subject of vigorous debate. 相似文献
54.
Toxicologic findings in the USS Iowa disaster. 总被引:5,自引:0,他引:5
The toxicologic results from the 47 victims of the explosion on the USS Iowa are presented. Good correlation between carboxyhemoglobin saturations and cause of death was found. There were no correlations between blood cyanide concentrations and causes of death. Volatile analysis suggested postmortem ethanol production rather than antemortem ethanol ingestion. No drugs except nicotine were detected in any of the victims. 相似文献
55.
56.
The impact of high temperatures (24 to 39 degrees C) and low to moderately high humidities (20 to 70%) on the applicability of TLC systems for drug identification was studied during a 6 month climatologic cycle in Burkina Faso (West Africa). In general, the Rf values as observed on the plates were found to be substantially affected as compared with values obtained at temperate climates. Some TLC systems were more affected than others and the largest deviations of up to 30 Rf units were at low humidities. Tropical conditions also had a negative effect on the reproducibility of Rf values. However, when an Rf-correction procedure was applied, using reference mixtures of known drugs on each plate, accuracy as well as reproducibility of the resulting Rfc values were drastically improved and data thus corrected were found to be compatible with existing TLC data bases developed under moderate climatological conditions. The impact of high to extremely high humidities (70 to 100%) remains to be investigated. 相似文献
57.
B G Rabe 《Journal of health politics, policy and law》1992,17(1):119-142
Hazardous waste management poses increasing problems for Canadian provinces and American states, given the vast quantities and types of wastes generated and the virtual inability to open new storage, treatment, or disposal facilities. The Canadian experience is very similar to the American one in many respects, except for the fact that three provinces (Alberta, Manitoba, and Quebec) have devised alternative approaches to siting that appear successful in moving beyond the political gridlock so common on this issue. In each of these cases, traditional, top-down approaches to siting have been eschewed in favor of a more comprehensive approach that includes extensive public participation, economic and social compensation packages, formal partnerships between public and private organizations, and direct links between siting proposals and other aspects of waste management, including waste reduction, recycling, and export/import control. 相似文献
58.
The increased risk of child maltreatment in the presence of domestic violence is well documented, but much remains unknown about factors that modify this relationship. This study investigates the roles of risk and protective factors in the relationship between domestic violence and being reported to the Department of Social Services for child maltreatment. Consistent with the literature, we find a significant overlap between domestic violence and maltreatment. Young maternal age, low education, low income, and lack of involvement in a religious community add to the risk for maltreatment associated with domestic violence. Separation between the maternal caregiver and her partner significantly reduces the risk for maltreatment when domestic violence is reported. A significant reduction in the risk for maltreatment is also found with higher levels of support from the maternal caregiver reported by the child in the context of domestic violence. 相似文献
59.
U.S. Supreme Court Justice Thurgood Marshall offered his opinion regarding the utility of public opinion polls as a tool for assessing the “evolving standards of decency” regarding capital punishment. His arguments became known as the Marshall hypotheses and spawned a considerable body of empirical testing. The three Marshall hypotheses are: (1) support for capital punishment is inversely associated with knowledge about it, (2) exposure to information about capital punishment produces sentiments in opposition to capital punishment, but (3) exposure to information about capital punishment will have no impact on those who support it for retributive reasons. The results of previous tests of these hypotheses were somewhat mixed but supportive. None of these studies, however, examined the effects of change in knowledge levels with changes, if any, in death penalty attitudes and beliefs as needed for a more complete test of the Marshall hypotheses. The present study addressed this shortcoming. The results provided mixed support for these three hypotheses. That is, death penalty supporters were somewhat less informed than death penalty opponents; exposure to death penalty information and knowledge gains tended to be associated with attitudinal change in a directions suggested by these hypotheses; but, retributivists' attitudes toward and beliefs about capital punishment were not any more resistant to change than were the attitudes and beliefs of non-retributivists. 相似文献
60.
Daniel B. Pickar 《Family Court Review》2007,45(1):103-115
Conducting child custody evaluations is one of the most complex, challenging, and sometimes risky professional endeavors that a mental health professional can perform. This article examines the professional and personal challenges which may be encountered by the evaluator. In addition to discussing the role requirements and need to maintain awareness of bias and countertransference, challenges such as coping with state board or ethics complaints and possible risks to personal safety are also addressed. Suggestions for risk management and coping with the demands of these assessments are offered, as well as the benefits and rewards of engaging in this important work. 相似文献