全文获取类型
收费全文 | 268篇 |
免费 | 13篇 |
专业分类
各国政治 | 31篇 |
工人农民 | 18篇 |
世界政治 | 20篇 |
外交国际关系 | 18篇 |
法律 | 118篇 |
中国政治 | 2篇 |
政治理论 | 71篇 |
综合类 | 3篇 |
出版年
2023年 | 1篇 |
2021年 | 2篇 |
2020年 | 4篇 |
2019年 | 9篇 |
2018年 | 6篇 |
2017年 | 7篇 |
2016年 | 21篇 |
2015年 | 9篇 |
2014年 | 14篇 |
2013年 | 56篇 |
2012年 | 8篇 |
2011年 | 12篇 |
2010年 | 7篇 |
2009年 | 14篇 |
2008年 | 12篇 |
2007年 | 11篇 |
2006年 | 13篇 |
2005年 | 4篇 |
2004年 | 9篇 |
2003年 | 6篇 |
2002年 | 2篇 |
2001年 | 3篇 |
2000年 | 4篇 |
1999年 | 7篇 |
1998年 | 2篇 |
1997年 | 4篇 |
1996年 | 4篇 |
1995年 | 4篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1992年 | 4篇 |
1991年 | 4篇 |
1990年 | 2篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1971年 | 1篇 |
排序方式: 共有281条查询结果,搜索用时 46 毫秒
91.
Kyla L. Kersh M.S. James M. Childers Ph.D. Dale Justice B.S. Greg Karim A.S. 《Journal of forensic sciences》2014,59(3):754-762
Detection of gunshot residue (GSR) is an arduous task for investigators. It is often accomplished with chemical tests, which can reveal elements and ions indicating the presence of GSR, but are likely to cause physical alteration to the pattern. In this study, the Spex Forensics Mini‐CrimeScope MCS 400, along with 16 accompanying wavelength filters, was applied to various GSR patterns and target types. Three dark shirt materials, four ammunition calibers, and eight ammunition manufacturers, along with the primer residue of the different manufacturer ammunitions were tested. Results indicate the alternate light source wavelength of 445 nm to be the optimal setting. In addition, target material plays a large role in the preservation of GSR patterns as particles burn. Furthermore, it can be extrapolated that residue, observed from a full round and firing distance of six inches, is mostly composed of unburnt gunpowder residue, not primer residue. 相似文献
92.
Antony Best Greg Kennedy Martin Thomas Edward Johnson Kendrick Oliver Ryan C. Hendrickson 《Diplomacy & Statecraft》2013,24(1):299-309
John R. Davis, Britain and the German Zollverein, 1848–66 (London: Macmillan, 1997). x + 238 pp. £45. ISBN 0–333–67828–1. Martin Thomas, Britain, France and Appeasement: Anglo‐French Relations in the Popular Front Era (Oxford and New York: Berg. 1996). xi + 268 pp. £29.95 hb; £12.95 pb. ISBN 1–85973–192–9. Peter Lowe, Containing the Cold War in East Asia: British Policies Towards Japan, China and Korea, 1948–53 (Manchester: Manchester University Press, 1997). xii + 288 pp. £40. ISBN 0–7190–2508–7. David M. Barrett, Uncertain Warriors: Lyndon Johnson and His Vietnam Advisers (Lawrence, Kansas: University of Kansas Press, 1994). xii + 279 pp. £11.95 pb. ISBN 0–7006–0631–9. Rhodri Jeffreys‐Jones, Changing Differences: Women and the Shaping of American Foreign Policy, 1917–1994 (New Brunswick, NJ: Rutgers University Press, 1997). x + 275 pp. £14.50 pb. ISBN 0–8135–2449–0. Philip M. Taylor, Global Communications, International Affairs and the Media Since 1945 (London &; New York: Routledge, 1997). xx + 248 pp. £45 hb. ISBN 0–415–11678–3; £15.99 pb. ISBN 0–415–11679–1 相似文献
93.
94.
95.
James Stray Vivian T. Nguyen Jacquelyn Benfield Rixun Fang Maxim Brevnov Lynda Treat-Clemons Greg Porter Manohar R. Furtado Jaiprakash G. Shewale 《Forensic Science International: Genetics Supplement Series》2009,2(1):64-65
Forensic DNA analysis is a multi-step process involving extraction of DNA, quantification of human DNA in the extract, amplification using multiplex STR systems, separation of products, and data analysis. The backlog of forensic casework is increasing worldwide. Automation is one significant way to alleviate the bottleneck of sample processing in forensic labs. The HID EVOlution™ Combination System described here is a robust, reliable sample processing platform, easily adapted to forensic laboratory workflows. Using a variety of forensic sample types including: blood stained FTA paper, cotton fabric and denim, dried blood spiked with known PCR inhibitors, saliva on cotton swabs, and semen stains, we found that yields of human DNA and STR profiles obtained with AmpFlSTR® Idenitfiler® kits were complete, highly reproducible, and equivalent to results obtained using the manual PrepFiler™ reagent extraction method. Automated operation was clean, and no cross-contamination was detected between extraction blanks and interspersed high DNA content samples. 相似文献
96.
97.
ABSTRACTThe prevalence and impact of cyber fraud continues to increase exponentially with new and more innovative methods developed by offenders to target and exploit victims for their own financial reward. Traditional crime reaction methods used by police have proved largely ineffective in this context, with offenders typically located outside of the police jurisdiction of their victims. Given this, some police agencies have begun to adopt a victim focused, crime prevention approach to cyber fraud. The current research explores with a sample of two hundred and eighteen potential cyber fraud victims, the relationship between online victimization risk, knowledge and use of crime prevention strategies. The study found those most at risk of cyber fraud victimization despite accurate perceptions of risk and knowledge of self-protective behaviors in the online environment underutilise online prevention strategies. This research has important implications for police agencies who are designing and delivering cyber fraud education. It provides guidance for the development of effective prevention programs based on practical skills development. 相似文献
98.
Bruce Budowle Ph.D. Maureen C. Bottrell M.S. Stephen G. Bunch Ph.D. Robert Fram M.A. Diana Harrison B.S. Stephen Meagher Cary T. Oien M.S. Peter E. Peterson Ph.D. Danielle P. Seiger M.F.S. Michael B. Smith B.A. Melissa A. Smrz M.S. Greg L. Soltis M.S. Robert B. Stacey M.A. 《Journal of forensic sciences》2009,54(4):798-809
Abstract: The forensic sciences are under review more so than ever before. Such review is necessary and healthy and should be a continuous process. It identifies areas for improvement in quality practices and services. The issues surrounding error, i.e., measurement error, human error, contextual bias, and confirmatory bias, and interpretation are discussed. Infrastructure is already in place to support reliability. However, more definition and clarity of terms and interpretation would facilitate communication and understanding. Material improvement across the disciplines should be sought through national programs in education and training, focused on science, the scientific method, statistics, and ethics. To provide direction for advancing the forensic sciences a list of recommendations ranging from further documentation to new research and validation to education and to accreditation is provided for consideration. The list is a starting point for discussion that could foster further thought and input in developing an overarching strategic plan for enhancing the forensic sciences. 相似文献
99.
This paper reports a study examining associations between objective indicators of the level of discipline within schools and
students’ perceptions of the strictness of discipline. Data were analyzed from the National Education Longitudinal Survey
(NELS), a nationally representative panel study of eighth grade students attending public and private schools in 1988. We
find evidence for an association between objective and perceived risk of discipline in models that examine the covariation
of these two constructs at several cross sections, and in models of change in perceptions as a function of change in school
sanctioning climate. Moreover, these associations were strongest in small and less disordered schools.
相似文献
Leigh BatesEmail: |
100.
Konrad N Daigle MS Daniel AE Dear GE Frottier P Hayes LM Kerkhof A Liebling A Sarchiapone M;International Association for Suicide Prevention Task Force on Suicide in Prisons 《危机》2007,28(3):113-121
In 2000 the Department of Mental Health of the World Health Organization (WHO) published a guide named Preventing Suicide. A Resource for Prison Officers as part of the WHO worldwide initiative for the prevention of suicide. In 2007 there are new epidemiological data on prison suicide, a more detailed discussion of risk factors accounting for the generally higher rate of suicide in correctional settings in comparison to the general population, and several strategies for developing screening instruments. As a first step, this paper presents an update of the WHO guide by the Task Force on Suicide in Prisons, created by the International Association for Suicide Prevention. A second paper, by the same Task Force, will present some international comparisons of suicide prevention services in correctional facilities. 相似文献