全文获取类型
收费全文 | 2776篇 |
免费 | 92篇 |
专业分类
各国政治 | 173篇 |
工人农民 | 97篇 |
世界政治 | 231篇 |
外交国际关系 | 183篇 |
法律 | 1207篇 |
中国政治 | 39篇 |
政治理论 | 888篇 |
综合类 | 50篇 |
出版年
2023年 | 19篇 |
2022年 | 14篇 |
2021年 | 27篇 |
2020年 | 35篇 |
2019年 | 69篇 |
2018年 | 83篇 |
2017年 | 89篇 |
2016年 | 89篇 |
2015年 | 74篇 |
2014年 | 108篇 |
2013年 | 393篇 |
2012年 | 102篇 |
2011年 | 76篇 |
2010年 | 75篇 |
2009年 | 86篇 |
2008年 | 85篇 |
2007年 | 104篇 |
2006年 | 92篇 |
2005年 | 78篇 |
2004年 | 87篇 |
2003年 | 85篇 |
2002年 | 80篇 |
2001年 | 53篇 |
2000年 | 51篇 |
1999年 | 47篇 |
1998年 | 39篇 |
1997年 | 37篇 |
1996年 | 37篇 |
1995年 | 39篇 |
1994年 | 43篇 |
1993年 | 44篇 |
1992年 | 37篇 |
1991年 | 32篇 |
1990年 | 20篇 |
1989年 | 38篇 |
1988年 | 21篇 |
1987年 | 28篇 |
1986年 | 26篇 |
1985年 | 34篇 |
1984年 | 36篇 |
1983年 | 32篇 |
1982年 | 33篇 |
1981年 | 30篇 |
1980年 | 24篇 |
1979年 | 14篇 |
1978年 | 15篇 |
1977年 | 13篇 |
1975年 | 16篇 |
1974年 | 12篇 |
1973年 | 17篇 |
排序方式: 共有2868条查询结果,搜索用时 15 毫秒
761.
Thali MJ Markwalder T Jackowski C Sonnenschein M Dirnhofer R 《Journal of forensic sciences》2006,51(1):113-119
The use of dental processing software for computed tomography (CT) data (Dentascan) is described on postmortem (pm) CT data for the purpose of pm identification. The software allows reconstructing reformatted images comparable to conventional panoramic dental radiographs by defining a curved reconstruction line along the teeth on oblique images. Three corpses that have been scanned within the virtopsy project were used to test the software for the purpose of dental identification. In every case, dental panoramic images could be reconstructed and compared to antemortem radiographs. The images showed the basic component of teeth (enamel, dentin, and pulp), the anatomic structure of the alveolar bone, missing or unerupted teeth as well as restorations of the teeth that could be used for identification. When streak artifacts due to metal-containing dental work reduced image quality, it was still necessary to perform pm conventional radiographs for comparison of the detailed shape of the restoration. Dental identification or a dental profiling seems to become possible in a noninvasive manner using the Dentascan software. 相似文献
762.
Greaney TL 《Journal of health politics, policy and law》2006,31(3):511-529
Following a string of government losses in cases challenging hospital mergers in federal court, the Federal Trade Commission and the Department of Justice issued their report on competition in health care seeking to set the record straight on a number of issues that underlie the judiciary's resolution of these cases. One such issue is the import of nonprofit status for applying antitrust law. This essay describes antitrust's role in addressing the consolidation in the hospital sector and the subtle influence that the social function of the nonprofit hospital has had in merger litigation. Noting that the political and social context in which these institutions operate is never far from the surface, it takes issue with the proposal to cabin merger doctrine so as to deny the significance of nonprofit status in merger analysis. Given the dynamic change in the regulatory climate and heterogeneity of local health care markets, it advises courts not to accept the FTC's preemptive standard regarding the significance of hospitals' nonprofit status and keep open the possibility of fashioning new presumptive rules tailored to more complete economic accounts of nonprofit firm behavior. 相似文献
763.
Garrity TF Prewitt SH Joosen M Tindall MS Webster JM Hiller ML Leukefeld CG 《International journal of offender therapy and comparative criminology》2006,50(3):269-279
Psychosocial stress is consistently found to promote initiation, intensification, and relapse in drug abuse. It would, therefore, be desirable to identify characteristics of offenders who are at heightened risk for stress-induced exacerbations of addictive behavior. In this cross-sectional, correlational, interview study, 500 clients of two Kentucky drug courts averaged 30 years of age and were predominantly male, White, employed, high school educated, single, and adjudicated in small- and medium-size cities. Five independent correlates of greater subjective stress emerged in stepwise multiple regression analysis (R2 = .395): use of escape-avoidance coping, positive reappraisal coping (inversely associated), more negative life events, better self-rated health (inversely associated), and access to social support related to work problems (inversely associated). Treatment interventions emphasizing effective coping styles and building of social support as well as managing of negative life events and perceptions of health may serve to lessen subjective stress and its consequences in drug-abusing criminal populations. 相似文献
764.
Gilbert MT Menez L Janaway RC Tobin DJ Cooper A Wilson AS 《Forensic science international》2006,156(2-3):208-212
We have investigated the susceptibility of degraded human hair shaft samples to contamination by exogenous sources of DNA, including blood, saliva, skin cells, and purified DNA. The results indicate that on the whole hair shafts are either largely resistant to penetration by contaminant DNA, or extremely easy to successfully decontaminate. This pertains to samples that are both morphologically and biochemically degraded. We suggest that this resistance to the incorporation of contaminant DNA relates to the hydrophobic and impermeable nature of the keratin structures forming the hair shaft. Therefore, hair samples represent an important and underestimated source of DNA in both forensic and ancient DNA studies. 相似文献
765.
Distribution of ethyl glucuronide in rib bone marrow, other tissues and body liquids as proof of alcohol consumption before death 总被引:4,自引:0,他引:4
Schloegl H Rost T Schmidt W Wurst FM Weinmann W 《Forensic science international》2006,156(2-3):213-218
Postmortem ethyl glucuronide (EtG) concentrations in rib bone marrow, liver, muscle, fat tissue, urine, blood and bile have been determined by LC-MS/MS. Samples have been taken from twelve corpses during autopsies. In nine corpses EtG could be detected, corresponding blood ethanol concentrations (BAC) were 0.04-0.37 g%. In three cases, no EtG was found; two of these cases showed postmortem BACs - possibly due to putrefaction - of 0.01 and 0.1g%. In rib bone marrow, which is easily accessible during autopsy, EtG concentrations (0.77-9.36 microg/g) have been lower than in blood (2.24-20.46 microg/mL) in eight of nine cases and comparable or higher than in muscle tissue. Therefore, rib bone marrow has been found suitable as matrix for EtG determination. The highest EtG concentrations have been found in urine in all but one case, where the resorption of ethanol had been incomplete. Second highest EtG concentrations have been detected in liver samples. In two cases with putrefaction, EtG could not be detected. In these cases, the detectable ethanol might have been produced partially or in total by postmortem fermentation. However, instability of EtG during putrefaction cannot be totally excluded which might result in a total loss of EtG. 相似文献
766.
Ensuring the safety of staff and patients has become a major problem for hospitals in China. This article examines whether one of the reasons for this violence may be the emerging injustice and inequality that have manifested in the Chinese health care system as a result of privatisation reforms since the early 1980s. It considers approaches to these issues that may assist the Chinese Government, and other nations contemplating similar policy changes, to create efficient but equity-based health care systems that minimise collateral trauma to patients and their families. 相似文献
767.
Understanding Interaction Models: Improving Empirical Analyses 总被引:15,自引:1,他引:14
768.
We report on the colonization of an adult human corpse by three insect species at 3350 m (11,000 ft) in elevation. The adult silphid Thanatophilus coloradensis (Wickham), adults of the blow fly Calliphora coloradensis (Hough), and larvae and adults of Lucilia silvarum (Meigen) were all collected from the victim's body which had been wrapped in plastic. The victim was found in late June in the Rocky Mountains of Colorado. This paper provides additional confirmation of the taxa utilizing a human corpse at high elevations in Colorado. 相似文献
769.
We report on two cases of suicide in which the victims started fires before their deaths. In one case the victim died of a single self-inflicted gunshot wound to the head after setting several fires in his residence. In the second case the victim hung himself after setting several fires in his residence and an adjoining building. In both cases, the victim's position was not near the origin of the fires suggesting that the arson was not a failsafe device to the primary mechanism of suicide. Neither victim showed a significant percentage of carboxyhemoglobin, or thermal damage from the fires. Both cases are remarkable in that, had the fire caused more damage to the remains and dwellings, a finding of suicide may not have been reached. We discuss similar aspects between the two reported cases and discuss differences observed with similar events such as complex suicide, suicide by self-immolation, and concealed homicide by burning. Similar cases should be reported to broaden our understanding of these complex events. 相似文献
770.
Participants recruited from one Historically Black University (HBU) and two predominantly White higher-education institutions evaluated and decided simulated voting rights case summaries in which the plaintiff was either a racially-defined (African American) or a nonracially-defined (farmers) minority group. Contrary to social identity and social justice findings of an in-group bias, the present study showed greater support at all institutions for the voting rights of the African Americans than for the rural farmers, and the greatest support for both minority groups was found at the HBU. Perceived evidence strength was a better predictor of decisions than perceived unfairness, and both of these predictor variables completely mediated the effects of institution-type and involvement of a racially-defined group on decisions. 相似文献