全文获取类型
收费全文 | 14689篇 |
免费 | 192篇 |
专业分类
各国政治 | 480篇 |
工人农民 | 1373篇 |
世界政治 | 715篇 |
外交国际关系 | 538篇 |
法律 | 8601篇 |
中国政治 | 63篇 |
政治理论 | 3091篇 |
综合类 | 20篇 |
出版年
2023年 | 38篇 |
2021年 | 53篇 |
2020年 | 97篇 |
2019年 | 151篇 |
2018年 | 1426篇 |
2017年 | 1367篇 |
2016年 | 1184篇 |
2015年 | 166篇 |
2014年 | 173篇 |
2013年 | 737篇 |
2012年 | 373篇 |
2011年 | 1080篇 |
2010年 | 1135篇 |
2009年 | 741篇 |
2008年 | 925篇 |
2007年 | 875篇 |
2006年 | 188篇 |
2005年 | 216篇 |
2004年 | 339篇 |
2003年 | 274篇 |
2002年 | 137篇 |
2001年 | 319篇 |
2000年 | 285篇 |
1999年 | 203篇 |
1998年 | 95篇 |
1997年 | 96篇 |
1996年 | 75篇 |
1995年 | 90篇 |
1994年 | 75篇 |
1993年 | 45篇 |
1992年 | 125篇 |
1991年 | 141篇 |
1990年 | 132篇 |
1989年 | 128篇 |
1988年 | 115篇 |
1987年 | 128篇 |
1986年 | 103篇 |
1985年 | 100篇 |
1984年 | 109篇 |
1983年 | 95篇 |
1982年 | 66篇 |
1981年 | 73篇 |
1980年 | 35篇 |
1979年 | 79篇 |
1978年 | 51篇 |
1975年 | 37篇 |
1974年 | 50篇 |
1973年 | 54篇 |
1972年 | 39篇 |
1971年 | 34篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Tim Kalafut Simone Pugh Peter Gill Sarah Abbas Marie Semaan Issam Mansour James Curran Jo-Anne Bright Tacha Hicks Richard Wivell John Buckleton 《Journal of forensic sciences》2022,67(1):128-135
Semaan et al. (J Forensic Res, 2020, 11, 453) discuss a mock case “where eight different individuals [P1 through P8] could not be excluded in a mixed DNA analysis. Even though … expert DNA mixture analysis software was used.” Two of these are the true donors. The LRs reported are incorrect due to the incorrect entry of propositions into LRmix Studio. This forced the software to account for most of the alleles as drop-in, resulting in LRs 60–70 orders of magnitude larger than expected. P1, P2, P4, P5, and P8 can be manually excluded using peak heights. This has relevance when using LRmix which does not use peak heights. We extend the work using the same two reference genotypes who were the true contributors as Semaan et al. (J Forensic Res, 2020, 11, 453). We simulate three two-donor mixtures with peak heights using these two genotypes and analyze using STRmix?. For the simulated 1:1 mixture, one of the non-donors’ LRs supported him being a contributor when no conditioning was used. When considered in combination with any other potential donors (i.e., with conditioning), this non-donor was correctly eliminated. For the 3:1 mixture, all results correctly supported that the non-donors were not contributors. The low-template 4:1 mixture LRs with no conditioning showed support for all eight profiles as donors. However, the results from pair-wise conditioning showed that only the two ground truth donors had LRs supporting that they were contributors to the mixture. We recommend the use of peak heights and conditioning profiles, as this allows better sensitivity and specificity even when the persons share many alleles. 相似文献
2.
Asia Europe Journal - This article examines the role of strategic partnerships in Indian foreign policy and the nature and perceptions of India and the European Union about the strategic... 相似文献
3.
Annelieke C. van den Berg Sarah N. Giest Sandra M. Groeneveld Wessel Kraaij 《Public administration review》2020,80(6):989-1000
Governments are increasingly implementing smart and digital approaches to promoting citizen participation. However, whether online participation platforms are tools that improve inclusivity in citizen participation remains underexplored. To address this gap, this article focuses on the role of recruitment messages and their effect on participation in an online participation platform by gender and age. A field experiment with a neighborhood census sample (N = 6,066) shows that online participation dips for younger and older citizens and is equal among women and men. For the age groups between 60 and 75, differences in the control and intervention recruitment messages significantly impacted participation. These findings can help public managers tailor recruitment strategies to facilitate inclusive participation and represent a first step toward learning what types of messages are effective for whom. 相似文献
4.
5.
6.
7.
Several studies had concluded that the police subculture holds values and attitudes that are distinct from the rest of the population. Among these values is a focus on law and order. While researchers agree that police tend to hold different values, they disagree on the source of the attitudes. Some had argued that the attitudes reflected differences regarding who was recruited for law enforcement careers while others said that the differences reflected changes that occurred to individuals after becoming officers. This study examined whether police officers and students enrolled in criminal justice/sociology classes held similar or different attitudes towards the Miranda warnings. The findings suggested that in some ways, the two groups perceived the warnings in dramatically different ways, while in other ways their differences were simply a matter of degree. Implications are provided. 相似文献
8.
Ellen K. Marshall Ph.D. 《Journal of Police and Criminal Psychology》2006,21(1):62-71
The present study measured the existence of traumatic stress symptomatology as reported by certified law enforcement officers
within the State of Delaware. A questionnaire was devised which documented age, sex, race, education, years of service, marital
status, children, rank, position, and shift work. The questionnaire was divided into parts which assessed the exposure and
the frequency of specific traumatic incidents experienced in the line of duty, and the frequency of experienced traumatic
symptomatology criteria: re-experiencing, numbing, and arousal. 相似文献
9.
10.
This study aimed to expand the scope of previous research by assessing the effectiveness of soot-removal techniques on glass from petrol-bomb debris using methods of 1% and 2% sodium hydroxide (NaOH) solutions, ultrasonic bath and vacuum suction. Of particular interest were the 1% and 2% NaOH solutions applied to the soot-covered surfaces. Petrol bombs containing petrol or a 50:50 mix of petrol and motor oil were exploded and the debris was collected for analysis. Favourable results were found to varying degrees using each of the soot-removal methods with the 1% and 2% NaOH wash solutions, being the most useful. The 2% NaOH solution also proved successful as a soak to loosen and remove heavy contamination of soot and accelerants without damaging the finger mark beneath. This study also found that recovery of finger marks in blood from beneath soot using the 2% NaOH solution was possible. Finger marks were also applied to glass bottles with plastic adhesive labels, and providing the fire damage is not too great marks were also retrievable. Results from this study lead to the conclusion that the NaOH wash solution is ideally suited for soot removal to reveal latent and blood-contaminated marks both within the laboratory and at crime scenes. 相似文献