全文获取类型
收费全文 | 548篇 |
免费 | 31篇 |
专业分类
各国政治 | 34篇 |
工人农民 | 69篇 |
世界政治 | 40篇 |
外交国际关系 | 34篇 |
法律 | 275篇 |
中国政治 | 9篇 |
政治理论 | 107篇 |
综合类 | 11篇 |
出版年
2023年 | 3篇 |
2022年 | 2篇 |
2021年 | 8篇 |
2020年 | 10篇 |
2019年 | 27篇 |
2018年 | 23篇 |
2017年 | 30篇 |
2016年 | 15篇 |
2015年 | 20篇 |
2014年 | 26篇 |
2013年 | 68篇 |
2012年 | 22篇 |
2011年 | 20篇 |
2010年 | 13篇 |
2009年 | 26篇 |
2008年 | 19篇 |
2007年 | 24篇 |
2006年 | 22篇 |
2005年 | 22篇 |
2004年 | 14篇 |
2003年 | 12篇 |
2002年 | 16篇 |
2001年 | 16篇 |
2000年 | 10篇 |
1999年 | 9篇 |
1998年 | 9篇 |
1997年 | 8篇 |
1996年 | 2篇 |
1995年 | 4篇 |
1994年 | 6篇 |
1993年 | 6篇 |
1992年 | 5篇 |
1991年 | 3篇 |
1989年 | 3篇 |
1988年 | 4篇 |
1987年 | 6篇 |
1986年 | 5篇 |
1985年 | 2篇 |
1984年 | 6篇 |
1983年 | 8篇 |
1982年 | 5篇 |
1980年 | 4篇 |
1978年 | 2篇 |
1977年 | 4篇 |
1976年 | 2篇 |
1972年 | 1篇 |
1971年 | 1篇 |
1970年 | 2篇 |
1968年 | 2篇 |
1966年 | 1篇 |
排序方式: 共有579条查询结果,搜索用时 15 毫秒
41.
42.
43.
Marie Lynn Miranda Jess W. Everett Daniel Blume Barbeau A. Roy 《Journal of policy analysis and management》1994,13(4):681-698
Coalitions of free-marketeers, politicians, and environmentalists increasingly are turning to the use of market-based incentives in formulating environmental policy. One promising application of market-based incentives is in the management of residential municipal solid waste. This article focuses on unit-based pricing programs established in conjunction with community recycling programs. Using data gathered through telephone and mail surveys of 21 cities, we demonstrate the strong potential for unit pricing to improve the efficiency of residential solid waste management. 相似文献
44.
Islamic homeland, soviet section
Alexandre Bennigsen and Marie Broxup, The Islamic Threat to the Soviet State. London & Canberra: Croom Helm, 1983, 170 pp. Cloth, £12.95. ISBN 0–7099–0619–6.
Islam Today: the USSR
T. S. Saidbaev, Islam: istoriia i sovremennost. Moscow: Znanie, 1985, 64 pp., 47,290 copies. Series Nauchnyi Ateizm, No. 11, 1985. 相似文献
45.
Priscilla K. Coleman 《Journal of youth and adolescence》2006,35(6):903-911
Using data from the National Longitudinal Study of Adolescent Health, various demographic, psychological, educational, and family variables were explored as predictors of pregnancy resolution. Only 2 of the 17 variables examined were significantly associated with pregnancy resolution (risk-taking and the desire to leave home). After controlling for these variables, adolescents who aborted an unwanted pregnancy were more inclined than adolescents who delivered to seek psychological counseling and they reported more frequent problems sleeping and more frequent marijuana use. No significant differences were observed for cigarette smoking, frequency of alcohol use, and problems with parents based on alcohol use after the controls were instituted; however without controls, significant associations were observed, underscoring the importance of the use of psychological and situational controls in studies of the consequences of abortion. The information derived from this study is potentially useful to parents and professionals who provide guidance to adolescents regarding pregnancy resolution. 相似文献
46.
Joyce Marie Mushaben 《Citizenship Studies》2006,10(2):203-227
Germany's refusal to pursue active integration policies for three decades has unleashed surprising do-it-yourself-integration processes among migrant communities, as demonstrated by dramatic changes in the Turkish ethnic economy since 1990. This study embeds these developments in an analytical framework linking economic enclaves and urban citizenship. Initially motivated by structural unemployment and social exclusion, guestworkers and their offspring are turning to self-employment, not only adding new jobs to an otherwise moribund national economy but also promoting urban revitalization in cities like Berlin, Frankfurt and Cologne. The study outlines generational differences within the Turkish-German community, ascertaining that third-generation ethnics are more likely to start businesses outside the food sector and more willing to embrace FRG citizenship. It describes the size and scope of ethnic enterprises across Germany, followed by a treatment of women entrepreneurs in Berlin. Ethnic associations indirectly foster “participatory” consciousness among males, but women tend to identify directly with the society that offers opportunities not available to them in the purported Turkish homeland. Instead of producing “parallel societies” (as German politicians often insist), ethnic businesses and local community involvement are crucial in bridging majority and minority cultures, on the one hand, and in granting Turkish entrepreneurs top-level access to state policy-makers—even without the formal rights of citizenship. 相似文献
47.
A DNA microarray system for forensic SNP analysis 总被引:3,自引:0,他引:3
Forensic DNA analysis is routinely performed using polymorphic short tandem repeat (STR) markers. However, for degraded or minute DNA samples, analysis of autosomal single nucleotide polymorphisms (SNPs) in short fragments might be more successful. Furthermore, sequencing of mitochondrial DNA (mtDNA) is often performed on highly degraded or scarce samples due to the high copy number of mtDNA in each cell. Due to the increasing number of complete mtDNA genome sequences available, the limited discrimination power of an mtDNA analysis, may be increased by analysis of coding region polymorphisms in addition to the non-coding variation. Since sequence analysis of the coding region would require more material than generally present in forensic samples, an alternative SNP analysis approach is required. We have developed a one-colour microarray-based SNP detection system for limited forensic materials. The method is based on minisequencing in solution prior to hybridisation to universal tag-arrays. In a first outline of a forensic chip, a combination of 12 nuclear and 21 mitochondrial SNP markers are analysed simultaneously. The mitochondrial markers on the chip are polymorphisms within the hypervariable region as well as in the coding region. Even though the number of markers in the current system is limited, it can easily be extended to yield a greater power of discrimination. When fully developed, microarray analysis provides a promising system for efficient sensitive SNP analysis of forensic samples in the future. 相似文献
48.
49.
50.
Shewale JG Nasir H Schneida E Gross AM Budowle B Sinha SK 《Journal of forensic sciences》2004,49(6):1278-1290
The Y-PLEX 12 system, developed for use in human identification, enables simultaneous amplification of eleven polymorphic short tandem repeat (STR) loci, namely DYS392, DYS390, DYS385 a/b, DYS393, DYS389I, DYS391, DYS389II, DYS 19, DYS439 and DYS438, residing on the Y chromosome and Amelogenin. Amelogenin provides results for gender identification and serves as internal control for PCR. The validation studies were performed according to the DNA Advisory Board's (DAB) Quality Assurance Standards. The minimal sensitivity of the Y-PLEX 12 system was 0.1 ng of male DNA. The mean stutter values ranged between 3.76-15.72%. A full male profile was observed in mixture samples containing 0.5 ng of male DNA and up to 400 ng of female DNA. Amelogenin did not adversely affect the amplification of Y-STRs in mixture samples containing male and female DNA. The primers for the Y-STR loci present in Y-PLEX 12 are specific for human DNA and some higher primates. None of the primate samples tested provided a complete profile at all 11 Y-STR loci amplified with the Y-PLEX 12 system. Y-PLEX 12 is a sensitive, valid, reliable, and robust multiplex system for forensic analysis, and it can be used in human forensic and male lineage identification cases. 相似文献