全文获取类型
收费全文 | 679篇 |
免费 | 36篇 |
专业分类
各国政治 | 40篇 |
工人农民 | 79篇 |
世界政治 | 56篇 |
外交国际关系 | 28篇 |
法律 | 334篇 |
中国政治 | 7篇 |
政治理论 | 168篇 |
综合类 | 3篇 |
出版年
2023年 | 7篇 |
2022年 | 3篇 |
2021年 | 6篇 |
2020年 | 12篇 |
2019年 | 20篇 |
2018年 | 24篇 |
2017年 | 30篇 |
2016年 | 30篇 |
2015年 | 19篇 |
2014年 | 27篇 |
2013年 | 103篇 |
2012年 | 17篇 |
2011年 | 25篇 |
2010年 | 20篇 |
2009年 | 28篇 |
2008年 | 22篇 |
2007年 | 25篇 |
2006年 | 20篇 |
2005年 | 13篇 |
2004年 | 14篇 |
2003年 | 13篇 |
2002年 | 18篇 |
2001年 | 17篇 |
2000年 | 20篇 |
1999年 | 19篇 |
1998年 | 10篇 |
1997年 | 12篇 |
1996年 | 9篇 |
1995年 | 8篇 |
1994年 | 8篇 |
1993年 | 8篇 |
1992年 | 11篇 |
1991年 | 9篇 |
1990年 | 8篇 |
1989年 | 5篇 |
1988年 | 5篇 |
1987年 | 3篇 |
1986年 | 5篇 |
1985年 | 7篇 |
1984年 | 6篇 |
1983年 | 8篇 |
1982年 | 3篇 |
1981年 | 5篇 |
1980年 | 3篇 |
1979年 | 4篇 |
1978年 | 4篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1975年 | 3篇 |
1968年 | 3篇 |
排序方式: 共有715条查询结果,搜索用时 15 毫秒
41.
James D. Wright 《Society》1991,28(5):81-84
He written widely on a variety of topics and is author or co-author of many books and articles. Among his books are Address Unknown: Homelessness in America; Homelessness and Health; After the Clean-Up: Long Range Effects of Natural Disasters;
Armed and Considered Dangerous: A Survey of Felons and Firearms; Under the Gun: Weapons Crime and Violence in America;and The State of the Masses.His current research focusses on adolescent violence and on treament programs for homeless alcohol and drug abusers. 相似文献
42.
43.
44.
45.
This article explores ways in which the relationships between 'government' and 'industry' in the making and carrying out of policy can be compared cross-sectorally and cross-nationally. It draws attention to the accumulating empirical evidence which suggests a disjuncture between conventional characterizations of national economic and industrial policies and processes, with what actually happens in practice. It argues that more systematic attention needs to be given to the analysis of the norms of policy and behaviour at different policy levels. Using the concepts of policy community and policy network, it shows how policy networks can be identified, characterized and compared, and how relationships within networks are regulated by 'rules of the game'. 相似文献
46.
James D. Wright 《Society》1988,25(5):64-69
He has written thirteen books, including: The State of the Masses,with Richard Hamilton; Under the Gun,with Peter Rossi and Kathleen Daly; and, most recently, Homelessness and Health,with Dee Weber. 相似文献
47.
48.
49.
Validation of a 16-locus fluorescent multiplex system 总被引:24,自引:0,他引:24
Krenke BE Tereba A Anderson SJ Buel E Culhane S Finis CJ Tomsey CS Zachetti JM Masibay A Rabbach DR Amiott EA Sprecher CJ 《Journal of forensic sciences》2002,47(4):773-785
STR multiplexes have been indispensable for the efficient genotyping of forensic samples. The PowerPlex 16 System contains the coreCODIS loci, D3S1358, D5S818, D7S820, D8S1179, D13S317, D16S539, D18S51, D21S11, CSF1PO, FGA, THOI, TPOX, vWA, the sex determinant locus, amelogenin, and two pentanucleotide STR loci, Penta D and Penta E. This multiplex satisfies the locus requirements for most national databases and is the most efficient currently available system due to its single PCR amplification. To provide the groundwork for judicial acceptance, including the publication of primer sequences, and to evaluate laboratory-to-laboratory variation, a developmental validation for casework on this commercially available system was performed in 24 laboratories and produced the following conclusions. Amplification was reliable on a variety of thermal cyclers and product could be analyzed on either an ABI PRISM 310 Genetic Analyzer or an ABI PRISM 377 DNA Sequencer. Genotyping using single source samples was consistent between 0.25 and 2 ng of input DNA template with a few laboratories obtaining complete genotypes at 0.0625 ng. However, heterozygote allele imbalance (<60% peak height balance) caused by stochastic effects was observed at a rate of 13% with 0.125 ng DNA and 22% at 0.0625 ng DNA. Mixture analyses were done using a total of 1 ng of DNA template. Most alleles were detected in mixtures of 4 to 1 and some minor alleles were detected in mixtures of 19 to 1. Optimum amplification cycle number was dependent on the sensitivity of the detection instrument used and could also be adjusted to accommodate larger amounts of DNA on solid supports such as FTA paper. Reaction conditions including volume, annealing temperature, and concentrations of primer, AmpliTaq Gold, and magnesium were shown to be optimal yet robust enough to withstand moderate variations without affecting genotype analysis. Environmental, matrix and standard source analyses revealed an ability to obtain complete genotypes in all sample types except those exposed to 80 degrees C for 12-48 days. Finally, comparison of genotype results from the PowerPlex 16 System with other commercially available systems on non-probative reference and forensic samples showed consistent results. 相似文献
50.