全文获取类型
收费全文 | 1959篇 |
免费 | 541篇 |
专业分类
各国政治 | 110篇 |
工人农民 | 30篇 |
世界政治 | 37篇 |
外交国际关系 | 76篇 |
法律 | 1567篇 |
中国共产党 | 5篇 |
中国政治 | 69篇 |
政治理论 | 526篇 |
综合类 | 80篇 |
出版年
2024年 | 1篇 |
2023年 | 7篇 |
2022年 | 6篇 |
2021年 | 43篇 |
2020年 | 68篇 |
2019年 | 177篇 |
2018年 | 163篇 |
2017年 | 143篇 |
2016年 | 161篇 |
2015年 | 139篇 |
2014年 | 140篇 |
2013年 | 399篇 |
2012年 | 224篇 |
2011年 | 171篇 |
2010年 | 99篇 |
2009年 | 69篇 |
2008年 | 117篇 |
2007年 | 95篇 |
2006年 | 79篇 |
2005年 | 45篇 |
2004年 | 45篇 |
2003年 | 44篇 |
2002年 | 20篇 |
2001年 | 14篇 |
2000年 | 6篇 |
1999年 | 4篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1992年 | 3篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1985年 | 1篇 |
排序方式: 共有2500条查询结果,搜索用时 15 毫秒
911.
Victor S. Mannarino M.D. Débora C. S. Pereira M.D. Wagner S. Gurgel M.D. Carolina B. F. Costa M.D. Alexandre M. Valença M.D. Leonardo F. Fontenelle M.D. Mauro V. Mendlowicz M.D. 《Journal of forensic sciences》2017,62(4):953-961
Self‐embedding behavior (SEB) is the repeated insertion of sharp objects, such as needles or pins, into the soft tissues of abdomen, limbs, and other body parts. In this study, two cases of SEB were reported and the scientific worldwide literature reviewed. Thirty‐two cases of SEB were identified through systematic searches in the main bibliographic databases. Mean age was 35 years (SD = 8.97). Just over two‐thirds of the patients were female. Although the number of embedded objects could be as high as 200, major clinical and surgical complications were uncommon and mortality was null. Patients with SEB presented three major diagnoses: psychotic (25%), personality (21.9%), and factitious (28.1%) disorders. The practice of SEB largely went undetected as the patients themselves did not bring it to the attention of family members or physicians and usually denied they have engaged in SEB. A high level of suspicion is required to avoid a missed diagnosis. 相似文献
912.
Current techniques used by forensic anthropologists for the identification of unknown human skeletal remains have largely been created using U.S. Black and White samples. When applied to Hispanics, these techniques perform poorly and can lead to misclassifications; consequently, there is an imperative need for population‐specific standards for Hispanics. This research examines the classification accuracies obtained by the original Walker (Am J Phys Anthropol, 136, 2008) and Klales et al. (Am J Phys Anthropol, 149, 2012) methods for nonmetric sex estimation and provides recalibrated regression equations specifically for Hispanics. Ordinal data were collected for five skull and three pelvic traits from a sample of 54 modern Hispanic individuals. Recalibration of the Klales et al. equation improved accuracy (90.3% vs. 94.1%), while recalibration of the Walker method equation decreased accuracy (81.5% vs. 74.1%), but greatly improved sex bias (22.2% vs. ?7.4%), thereby making the recalibrated equations more appropriate for use with Hispanics. 相似文献
913.
Quantifying Sexual Dimorphism in the Human Cranium: A Preliminary Analysis of a Novel Method
下载免费PDF全文
![点击此处可从《Journal of forensic sciences》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Ana M. Casado M.A. 《Journal of forensic sciences》2017,62(5):1259-1265
In forensic anthropology, sexually dimorphic cranial features are traditionally visually assessed and scored using an ordinal scale, which is highly subjective. This study quantifies six cranial features using original three‐dimensional coordinate measurements to provide greater accuracy in sex estimation. Cranial features include supraorbital ridges, glabella, external occipital protuberance, nuchal protuberances, mastoid processes, and frontal bosses. Measurements were taken using coordinate calipers from 158 White and Black male and female crania from the Maxwell Documented Collection at University of New Mexico and Tennessee's Bass Collection. Overall, 72.2% of the crania were correctly classified. Males were correctly classified 69.9% of the time, while females were correctly classified 74.7% of the time. The overall value is similar to the results from traditional methods and suggests this method may be just as reliable as established visual sex estimation techniques. 相似文献
914.
Determination of time since death (TSD) plays very important role in forensic examination as it narrows down field of suspects and aids in deceased identification. This study utilizes the fluorescence property of vitreous humor (VH) tryptophan to determine TSD using o‐phthalaldehyde (OPA). The detection limit of these fluorometric studies was found to be 8 ppb indicating sensitivity and high accuracy in TSD determination. The study was performed on selected 76 cadaver with known TSD ranging from 3 to 90 h. Excellent correlation between VH tryptophan and TSD was obtained with a coefficient of correlation R2 = 0.9590. Results showed statistically significant increase in vitreous tryptophan with TSD up to 90 h, and the proposed method was efficaciously applied for prediction of TSD as no systematic error exist. The regression equation obtained from the study is [Trp] = 2.21 + 2.98 * TSD. 相似文献
915.
《国际相互影响》2012,38(2):85-100
Does provocation engender a response in like kind? Research suggests that a matched response is common among rivals and is a preferred strategy in situations which resemble prisoner's dilemma. Yet, there is no empirical evidence for matching outside of rivalry or the use of force. This paper examines the hypothesis that nation‐actors respond to provocation in kind by considering the effect of provocation on foreign policy response for a wide range of conflict behavior and a variety of non‐rival nation‐actors. The thesis is advanced that the unique characteristics of dyadic interaction, specifically threat and involvement, serve to dampen or exaggerate response. Using pooled time series analysis of thirty‐five cases from 1950 to 1975, a test of this hypothesis is made. The results show that high levels of involvement discount threat and promote under reaction while low levels preclude response entirely. Moderate levels both dampen and exaggerate threat perception contingent upon the structure of dyadic interaction. For robustness, eleven illustrative cases are examined to flesh out specific dyadic variation. Finally, for comparison, the U.S.‐Sovict rivalry is also examined and shown to reveal a response pattern which includes a retaliatory memory. 相似文献
916.
《国际相互影响》2012,38(4):323-346
Employing events indices for cooperation and conflict from the COPDAB data set, the graphic structuring process established by Steven Brams, and several alternative methods of quantifying the resulting event digraphs, this paper examines the utility of the graphic structuring process in efforts at explanation and prediction. Arguing that if the graphic structure represents an underlying structural order in the foreign policy behavior of states, predictability should exist between the graphic portrayal and other behavioral structures around it. Despite face validity in the sociometric qualities of the digraph results, little predictive capability was uncovered. The paper explains the testing process, disc asses the test results, and proposes alternative uses for the structural mapping procedure. 相似文献
917.
《国际相互影响》2012,38(4):353-380
We conducted an experimental test of spiraling behavior, sex differences, and uncertainty in a simulated crisis situation. We investigated the relationship between weapons acquisition and the likelihood of engaging in aggressive behavior, such as going to war. The sample included 100 male and female subjects who participated in a crisis simulation in same‐sex dyads; each student was instructed to role play the leader of a country in conflict with another leader over a nearby island replete with newly discovered oil resources. Participants were randomly assigned to stimulus materials that manipulated the certainty of the information they received about their partner's force structure. In four cycles of decision‐making, each participant made procurement decisions, took an action related to the conflict, including decisions about going to war, completed questionnaires on characteristics such as the hostility and trustworthiness of themselves and their opponents, and wrote messages to the other member of the pair. The results of the study demonstrate a strong relationship between weapons acquisition and hostility. In addition, we found large and robust sex differences, showing that men are much more likely than women to acquire weapons and engage in aggressive behavior at every stage. There was no effect of uncertainty on either arms procurement or aggression. 相似文献
918.
Marcus Roberts 《The Modern law review》2017,80(2):339-351
In MWB Business Exchange Centres Ltd v Rock Advertising Ltd the Court of Appeal held that when an ongoing contract is varied so that one party's obligation to pay money is reduced, the variation is binding as long as the other party receives a practical benefit. In doing so, the Court of Appeal effectively confined the rule in Foakes v Beer to one‐off payments. This raises serious questions about the continued survival of Foakes v Beer. On the other hand, the Court of Appeal ensured that Foakes v Beer would not be killed off via equity by moving away from the suggestion in Collier v P & M J Wright (Holdings) Ltd that an agreed part‐payment of a debt by a debtor will always raise an estoppel preventing the creditor from demanding the remainder of the debt. 相似文献
919.
920.
David Weisburd David P. Farrington Charlotte Gill With Mimi Ajzenstadt Trevor Bennett Kate Bowers Michael S. Caudy Katy Holloway Shane Johnson Friedrich Lösel Jacqueline Mallender Amanda Perry Liansheng Larry Tang Faye Taxman Cody Telep Rory Tierney Maria M. Ttofi Carolyn Watson David B. Wilson and Alese Wooditch 《犯罪学与公共政策》2017,16(2):415-449