全文获取类型
收费全文 | 10913篇 |
免费 | 406篇 |
专业分类
各国政治 | 634篇 |
工人农民 | 524篇 |
世界政治 | 753篇 |
外交国际关系 | 413篇 |
法律 | 6699篇 |
中国共产党 | 4篇 |
中国政治 | 66篇 |
政治理论 | 2129篇 |
综合类 | 97篇 |
出版年
2023年 | 75篇 |
2021年 | 84篇 |
2020年 | 182篇 |
2019年 | 240篇 |
2018年 | 337篇 |
2017年 | 360篇 |
2016年 | 361篇 |
2015年 | 241篇 |
2014年 | 274篇 |
2013年 | 1330篇 |
2012年 | 342篇 |
2011年 | 315篇 |
2010年 | 253篇 |
2009年 | 256篇 |
2008年 | 333篇 |
2007年 | 310篇 |
2006年 | 321篇 |
2005年 | 280篇 |
2004年 | 301篇 |
2003年 | 249篇 |
2002年 | 247篇 |
2001年 | 295篇 |
2000年 | 300篇 |
1999年 | 211篇 |
1998年 | 135篇 |
1997年 | 133篇 |
1996年 | 117篇 |
1995年 | 111篇 |
1994年 | 102篇 |
1993年 | 121篇 |
1992年 | 190篇 |
1991年 | 208篇 |
1990年 | 187篇 |
1989年 | 186篇 |
1988年 | 164篇 |
1987年 | 188篇 |
1986年 | 180篇 |
1985年 | 172篇 |
1984年 | 162篇 |
1983年 | 168篇 |
1982年 | 102篇 |
1981年 | 91篇 |
1980年 | 79篇 |
1979年 | 107篇 |
1978年 | 76篇 |
1977年 | 77篇 |
1975年 | 62篇 |
1974年 | 67篇 |
1973年 | 74篇 |
1972年 | 67篇 |
排序方式: 共有10000条查询结果,搜索用时 16 毫秒
1.
Stephanie Hartley Allysha Powanda Winburn Itiel E. Dror 《Journal of forensic sciences》2022,67(1):68-79
Subjective decisions make human cognitive processes more susceptible to bias and error. Specifically, research indicates that additional context biases forensic anthropologists’ morphological analyses. To address whether metric analyses are also subject to bias, we conducted a pilot study in which 52 experienced osteologists measured a difficult-to-classify human femur, with or without additional contextual information. Using a metric sectioning-point sex-estimation method, participants provided a sex estimate for individual skeletal element(s) and, when given multiple elements, the combined skeletal assemblage. Control group participants (n = 24) measured only the femur. In addition to the femur, bias group participants (n = 28) either measured a female humerus and viewed a female-biasing photograph (n = 14) or measured a male humerus and viewed a male-biasing photograph (n = 14). We explored whether the experts in the different groups would differ in: (1) femoral measurements; (2) femoral sex-estimation conclusions; and (3) final sex-estimation conclusions for the skeletal assemblage. Although the femoral measurements and femoral sex estimates were comparable across groups, the overall sex estimates in the female-biased group were impacted by contextual information—differing from both the control and male-biased groups (p < 0.001). Our results demonstrate that cognitive bias can occur even in metric sex-estimation conclusions. Specifically, this occurred when the metric data and single-element sex estimates were synthesized into an overall estimate. Thus, our results suggest that metric methods are most vulnerable to bias when data are synthesized into an overall conclusion, highlighting the need for bias countermeasures and comprehensive statistical frameworks for synthesizing metric data to mitigate the effects of cognitive bias. 相似文献
2.
Walter E. Bruehs Nicole M. Tucker Kimberly A. Meline 《Journal of forensic sciences》2022,67(1):200-206
Often, criminal acts involving a vehicle are caught on digital video surveillance systems. While potentially useful for an investigation, the recording conditions are typically less than optimal for the extraction of key information for the identification of the perpetrator, such as a license plate. Providing the make, model and year of a questioned vehicle is a common request for examiners, to narrow the field of potential suspect vehicles. This study seeks to compare the performance of a nonpeer-reviewed make, model, and year determination between two separate groups, specifically, trained forensic image examiners and nontrained individuals. Results show that even with varied image capture conditions and quality, the trained forensic image examiners more correctly and completely identified the test group of questioned vehicles make, model, and year. 相似文献
3.
4.
Law and Critique - Generally, regulation is thought of as a constant that carries with it both a formative and conservative power, a power that standardises, demarcates and forms an order, through... 相似文献
5.
Bart Schuurman Lasse Lindekilde Stefan Malthaner Francis O'Connor Paul Gill Noémie Bouhana 《冲突和恐怖主义研究》2019,42(8):771-778
This research note argues that the “lone wolf” typology should be fundamentally reconsidered. Based on a three-year empirical research project, two key points are made to support this argument. First, the authors found that ties to online and offline radical milieus are critical to lone actors' adoption and maintenance of both the motive and capability to commit acts of terrorism. Second, in terms of pre-attack behaviors, the majority of lone actors are not the stealthy and highly capable terrorists the “lone wolf” moniker alludes to. These findings not only urge a reconsideration of the utility of the lone-wolf concept, they are also particularly relevant for counterterrorism professionals, whose conceptions of this threat may have closed off avenues for detection and interdiction that do, in fact, exist. 相似文献
6.
Soumaila Gansonré 《Development in Practice》2019,29(3):326-335
This article investigates off-farm work decisions by smallholder farm households. Using data on 1,101 households from Burkina Faso, it demonstrates that in addition to the usual household socio-demographic characteristics, remittances, access to information and beneficiary of specific training affect off-farm work decisions, as well as rainfall factors and idiosyncratic health shocks. Community characteristics such as accessibility and number of inhabitants are also key factors. While suggesting that off-farm work is less likely to be undertaken for accumulation purposes, these results have important policy implications. In particular, policy measures should consider each segment as a separate entity. 相似文献
7.
This article aims to assess the role of important socio-economic factors in the family history of tuberculosis patients in Pakistan. Data were collected from 269 patients, and a logistic regression was used to determine the association between risk factors and the vicious circle of TB. Results of the logistic model show that significant risk factors associated with TB history in patients were education, household size, house structure, rooms in the home, room ventilation, monthly income, income food sufficiency, smoking, diabetes, and heart disease. The current TB control programme needs to formulate strategies to target specific risk factors and poverty reduction simultaneously to break the vicious circle of tuberculosis. 相似文献
8.
Duell Natasha Steinberg Laurence Icenogle Grace Chein Jason Chaudhary Nandita Di Giunta Laura Dodge Kenneth A. Fanti Kostas A. Lansford Jennifer E. Oburu Paul Pastorelli Concetta Skinner Ann T. Sorbring Emma Tapanya Sombat Tirado Liliana Maria Uribe Alampay Liane Peña Al-Hassan Suha M. Takash Hanan M. S. Bacchini Dario Chang Lei 《Journal of youth and adolescence》2019,48(4):835-836
Journal of Youth and Adolescence - In the original publication, the legends for Figs 4 and 5 were incorrect, such that each regression line was mislabeled with the incorrect country. Below are the... 相似文献
9.
Marloes E. M. Vester M.D. Ph.D. Kurt B. Nolte M.D. Ph.D. Gary M. Hatch M.D. Chandra Y. Gerrard M.P.H. B.S. Reinoud D. Stoel Ph.D. Rick R. van Rijn M.D. Ph.D. 《Journal of forensic sciences》2020,65(5):1568-1573
Postmortem computed tomography (PMCT) is integrated into the evaluation of decedents in several American medical examiner offices and medicolegal death investigative centers in many other countries. We retrospectively investigated the value of PMCT in a series of firearm homicide cases from a statewide centralized medical examiner’s office that occurred during 2016. Autopsies were performed or supervised by board-certified forensic pathologists who reviewed the PMCT scans prior to autopsy. PMCT scans were re-evaluated by a forensic radiologist blinded to the autopsy findings and scored by body region (head–neck, thoracoabdominal, and extremities). Injury discrepancies were scored using a modified Goldman classification and analyzed with McNemar’s test. We included 60 males and 20 females (median age 31 years, range 3–73). Based on PMCT, 56 (79.1%) cases had injuries relevant to the cause of death in a single body region (24 head–neck region, 32 thoracoabdominal region). Out of these 56 cases, 9 had a missed major diagnosis by PMCT outside that region, including 6 extremity injuries visible during standard external examination. Yet all had evident lethal firearm injury. We showed that PMCT identifies major firearm injuries in homicide victims and excludes injuries related to the cause of death in other regions when a single body region is injured. Although PMCT has a known limited sensitivity for soft tissue and vascular pathology, it can be combined with external examination to potentially reduce or focus dissections in some of these cases depending on the circumstances and medicolegal needs. 相似文献
10.
Palacios Diego Berger Christian Luengo Kanacri Bernadette Paula Veenstra René Dijkstra Jan Kornelis 《Journal of youth and adolescence》2019,48(10):2005-2022
Journal of Youth and Adolescence - How the interplay between peer relationships and behaviors unfolds and how this differs between classrooms is an understudied topic. This study examined whether... 相似文献