全文获取类型
收费全文 | 807篇 |
免费 | 38篇 |
专业分类
各国政治 | 69篇 |
工人农民 | 16篇 |
世界政治 | 91篇 |
外交国际关系 | 78篇 |
法律 | 346篇 |
中国政治 | 8篇 |
政治理论 | 232篇 |
综合类 | 5篇 |
出版年
2023年 | 6篇 |
2022年 | 5篇 |
2021年 | 9篇 |
2020年 | 19篇 |
2019年 | 19篇 |
2018年 | 35篇 |
2017年 | 35篇 |
2016年 | 33篇 |
2015年 | 22篇 |
2014年 | 30篇 |
2013年 | 137篇 |
2012年 | 17篇 |
2011年 | 30篇 |
2010年 | 19篇 |
2009年 | 27篇 |
2008年 | 29篇 |
2007年 | 47篇 |
2006年 | 43篇 |
2005年 | 19篇 |
2004年 | 22篇 |
2003年 | 24篇 |
2002年 | 22篇 |
2001年 | 14篇 |
2000年 | 15篇 |
1999年 | 15篇 |
1998年 | 13篇 |
1997年 | 15篇 |
1996年 | 7篇 |
1995年 | 12篇 |
1994年 | 3篇 |
1993年 | 8篇 |
1992年 | 15篇 |
1991年 | 9篇 |
1990年 | 4篇 |
1986年 | 3篇 |
1985年 | 5篇 |
1984年 | 3篇 |
1983年 | 4篇 |
1980年 | 6篇 |
1979年 | 3篇 |
1978年 | 4篇 |
1977年 | 4篇 |
1975年 | 3篇 |
1974年 | 2篇 |
1973年 | 2篇 |
1972年 | 3篇 |
1971年 | 2篇 |
1969年 | 4篇 |
1967年 | 2篇 |
1966年 | 3篇 |
排序方式: 共有845条查询结果,搜索用时 15 毫秒
221.
This paper examines and compares, according to the New Public Management approach, the U.S. watchdog, the Government Accountability Office, in its ability to oversee and call to account the executive branch of government, and its U.K. counterpart, the National Audit Office. Results of this examination indicate that the Government Accountability Office is more effective than its U.K. counterpart. Its greater effectiveness is attributable to the fact that it derives its powers and legitimacy from a written constitution; in contrast, in the United Kingdom there is no equivalent document defining the relationship between the state and the citizenry. As a consequence, the powers, duties, and self-perception of the National Audit Office are significantly weaker and more mutable than those of the Government Accountability Office. 相似文献
222.
Counting virgins is described as social bookkeeping, a necessary but not sufficient task for social scientists. More important is the development of an understanding of the social processes which encourage or inhibit coital behavior. The analysis in this paper uses the socialbookkeeping approach to document the relatively stable rates of early and premarital coitus since the Kinsey report. The data are drawn from a 1972 study of 14–18-year-olds and a 1967 study of college students. When appropriate controls for educational attainment and age are introduced, it is shown that, in comparison to the change in rates at the beginning of the century, the rates since the 1940's have increased only a fourth as much. More importantly, coital behavior is shown to be still strongly linked to traditional patterns of restraint and facilitation. Traditional factors, such as relationships with parents and religious attendance, are shown to restrain early coital experience (defined as coitus before age 18), while factors linked to the courtship process such as dating frequency, facilitated this early behavior. During college both restraining and facilitating factors were operative, but levels of coital behavior in most cases stayed surprisingly low. Rates of frequent coitus rarely reached 40% among female college seniors and the proportion of college female seniors with three or more partners never reached 20%. The factors which encourage sexual activity during college are the courtship factorsdating behavior and being in love. In terms of initial coitus, women overwhelmingly report that they were in love with their partner. Given the relative stability of rates of early and premarital coitus and continuity of the role of courtship factors in facilitating this behavior, popular discussions of the contemporary sexual revolution are seen as being out of touch with reality and possibly inducing anxiety among young people when they do not experience the sexual revolution.Data analysis for this paper was carried out under NICHD grant HD 04156 and Illinois Law Enforcement Commission grant 2-09-25-0410-02, and also General Support Grant 5-SO1-RRO-5666-05.Received Ph.D. in Sociology from the University of Chicago. Research interests include post childhood socialization, social change and deviance, and urban social studies.Received Ph.D. in Sociology from the University of Chicago. Main research interests include adolescence, urban social studies, and adult socialization.Received Ph.D. in Sociology from the University of Chicago. Main research interest is social change and deviance. 相似文献
223.
The present article focuses upon the much-neglected topic of white working class youth — the children of another other America. Based upon the available literature as well as upon a recent program of ethnographic research, the institutional settings — community, family, school — within which working class youth grow up are examined with particular emphasis on their climate and values. Attention is paid to the heterogeneity contained within this segment of the population pointing to four distinct types: collegians, greasers, hippies, and those encapsulated in family life. The article points to factors that promote a potential increase in residential social class homogeneity that, in turn, promotes class values, social and personal expectations, and modal relationships that increasingly diverge from the norms of an urban-industrial middle class society and that in considerable measure either contribute to a growing conservative alienation from the larger society or make adjustments to that society more problematic for its youth. The emergent picture of white working youth in part resembles that of youth in general, but in a more significant measure is much different from that found in either higher or lower social strata.This research was supported by USPHS-NIH Contract 70-511 and USPHS-NICHD Grant No. 04156.Received Ph.D. in Sociology from the University of Chicago. Research interests include post childhood socialization, social change and deviance, and urban social studies.Received Ph.D. in Sociology from the University of Chicago. Main research interest is social change and deviance.Candidate for Ph.D. in Sociology from Northwestern University. Main research interests are social stratification, youth, and social change in an industrial society. 相似文献
224.
This paper describes a procedure for the determination of psilocin and psilocybin in mushroom extracts using high-performance liquid chromatography with postcolumn chemiluminescence detection. A number of extraction methods for psilocin and psilocybin in hallucinogenic mushrooms were investigated, with a simple methanolic extraction being found to be most effective. Psilocin and psilocybin were extracted from a variety of hallucinogenic mushrooms using methanol. The analytes were separated on a C12 column using a (95:5% v/v) methanol:10 mM ammonium formate, pH 3.5 mobile phase with a run time of 5 min. Detection was realized through a dual reagent chemiluminescence detection system of acidic potassium permanganate and tris(2,2'-bipyridyl)ruthenium(II). The chemiluminescence detection system gave improved detectability when compared with UV absorption at 269 nm, with detection limits of 1.2 x 10(-8) and 3.5 x 10(-9) mol/L being obtained for psilocin and psilocybin, respectively. The procedure was applied to the determination of psilocin and psilocybin in three Australian species of hallucinogenic mushroom. 相似文献
225.
The performance of the sub-population model first proposed by Balding and Nichols [D.J. Balding, R.A. Nichols, DNA profile match probability calculation: how to allow for population stratification, relatedness, database selection and single bands. Forensic Sci. Int. 64 (1994) 125-140] is examined using a simulation approach. This work extends the investigations of Curran et al. [J.M. Curran, J.S. Buckleton, and C.M. Triggs, What is the magnitude of the sub-population effect? Forensic Sci. Int. 135 (2003) 1-8]. In particular the effect of underestimating the coancestry coefficient, theta, and the effect of departures from the modelling assumptions were investigated. The model tends to give strongly conservative estimates if the estimate for the coancestry coefficient is accurate. If this coefficient is underestimated then a larger fraction of cases give non-conservative estimates. Departures from the modelling assumption that the sub-population is in Hardy-Weinberg and linkage equilibria appear to have very little effect. 相似文献
226.
The post-1999 devolution project has resulted in a major recalibrationof the preexisting arrangements for making European Union policywithin the United Kingdom. The devolved administrations in Scotlandand Wales (but not the English regions) have gained in electorallegitimacy and legislative powers, and thereby have a greaterclaim to consultation with UK central government. Four key characteristicsof European Union policymaking in a devolved United Kingdomare identified. The legal contingency of the "devolveds" statushas not yet impeded traditional cooperative relations betweengovernment tiers, but the stability of the new arrangementsremains in question. The UK case is compared with European Unionregionalization in other member states and a distinction isdrawn between a cooperative regionalist approach (the devolveds)and a consultative one (the English regions). 相似文献
227.
228.
To obtain a reliable estimation on the yield of illicit indoor cannabis cultivation in The Netherlands, cannabis plants confiscated by the police were used to determine the yield of dried female flower buds. The developmental stage of flower buds of the seized plants was described on a scale from 1 to 10 where the value of 10 indicates a fully developed flower bud ready for harvesting. Using eight additional characteristics describing the grow room and cultivation parameters, regression analysis with subset selection was carried out to develop two models for the yield of indoor cannabis cultivation. The median Dutch illicit grow room consists of 259 cannabis plants, has a plant density of 15 plants/m(2), and 510 W of growth lamps per m(2). For the median Dutch grow room, the predicted yield of female flower buds at the harvestable developmental stage (stage 10) was 33.7 g/plant or 505 g/m(2). 相似文献
229.
Gang violence creates serious safety and security concerns in the community and prisons. Treated gang and nongang members recidivated significantly less in a 24-month follow-up than their untreated matched controls. Treatment consisted of high intensity cognitive-behavioral programs that follow the risk, need, and responsivity principles (Andrews & Bonta, 2003). The treated gang members who recidivated violently after treatment received significantly shorter sentences (i.e. they committed less serious offences) than their untreated matched controls. Untreated gang members had significantly higher rates of major (but not minor) institutional offences than the other three groups. Correctional treatment that follows the risk, need and responsivity principles appears able to reduce recidivism and major institutional misconduct. Effective correctional treatment should be considered as one of the approaches in the management and rehabilitation of incarcerated gang members. 相似文献
230.