全文获取类型
收费全文 | 3001篇 |
免费 | 65篇 |
专业分类
3066篇 |
出版年
2020年 | 20篇 |
2019年 | 23篇 |
2018年 | 327篇 |
2017年 | 236篇 |
2016年 | 281篇 |
2015年 | 51篇 |
2014年 | 36篇 |
2013年 | 599篇 |
2012年 | 84篇 |
2011年 | 208篇 |
2010年 | 247篇 |
2009年 | 97篇 |
2008年 | 110篇 |
2007年 | 178篇 |
2006年 | 69篇 |
2005年 | 52篇 |
2004年 | 42篇 |
2003年 | 26篇 |
2002年 | 19篇 |
2001年 | 17篇 |
2000年 | 10篇 |
1999年 | 16篇 |
1998年 | 15篇 |
1997年 | 6篇 |
1996年 | 9篇 |
1995年 | 18篇 |
1994年 | 12篇 |
1993年 | 9篇 |
1992年 | 12篇 |
1991年 | 9篇 |
1990年 | 8篇 |
1989年 | 12篇 |
1988年 | 13篇 |
1987年 | 16篇 |
1986年 | 11篇 |
1985年 | 14篇 |
1984年 | 11篇 |
1983年 | 9篇 |
1982年 | 10篇 |
1981年 | 12篇 |
1980年 | 14篇 |
1979年 | 7篇 |
1978年 | 8篇 |
1977年 | 6篇 |
1976年 | 8篇 |
1975年 | 8篇 |
1972年 | 10篇 |
1971年 | 5篇 |
1970年 | 7篇 |
1969年 | 5篇 |
排序方式: 共有3066条查询结果,搜索用时 0 毫秒
101.
102.
103.
H. Cohen V. Slon A. Barash H. May B. Medlej I. Hershkovitz 《International Journal of Osteoarchaeology》2015,25(3):265-280
The Assyrians, who ruled at the height of their power between Egypt and the Persian Gulf (745–630 BC), are known from historical records to have been cruel and unrelenting towards their enemies. However, osteological evidence for this behavior is scarce. We herein present a case of an adult male skeleton, dated to the Iron Age IIB period (second half of the 8th century BC), who manifests traumatic injuries to the skull, left forearm, vertebrae, and ribs. Using modern forensic methods, the injuries were studied, and the consequences that led to these injuries reconstructed. Three possible scenarios are presented: (i) wounds inflicted during a chaotic battle; (ii) wounds caused by the chasing and capturing of a victim; and (iii) a commonly practiced violent attitude of Assyrian soldiers towards a captive combatant. Combining all the evidence at hand, the latter scenario appears more likely. This skeleton may therefore be one of the sole tangible physical evidence for the veracity of the Assyrians’ post‐battle behavior, as depicted in ancient texts and reliefs. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
104.
Khonkho Wankane is a ceremonial center located in the southern Lake Titicaca Basin, Bolivia. During the Late Formative period (AD 1–500), its residents practiced agropastoral lifeways and participated in the rise of the state at Tiwanaku. Like at many Andean sites, bones from the family Camelidae are the most abundant large mammal in domestic contexts. Identifying camelid morphotypes represented by these bones carries far‐reaching implications for understanding past hunting, herding, and caravanning practices, and their roles in larger social and economic webs. Identifications were based on a locally focused reference collection, including llamas (Lama glama) from the immediate vicinity of the site, as well as Andean guanacos (Lama guanicoe), a much smaller morphotype than the Patagonian guanacos used in many osteometric studies. Multivariate statistical analyses and incisor morphology identified all four camelid. Different analyses suggest that the crux of osteometry lies in the reference collection, not the statistical test. An additional, very large morphotype likely corresponds to a castrated llama, the preferred cargo animal among modern drovers. The presence of these animals is interpreted as evidence that groups hunted vicuña (Vicugna vicugna) and guanaco, which are not currently present around the site, herded llamas and alpacas (Vicugna pacos), and perhaps organized caravans with castrated llamas. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
105.
106.
107.
108.
109.
Debora Zurro 《Archaeological and Anthropological Sciences》2018,10(7):1673-1691
The number of phytolith studies has increased steadily in the last decades in palaeoecological as well as archaeological research, and phytolith analysis is currently recognised as a proper area of expertise within archaeobotany. This has led towards a strengthening in the standardisation of the different steps involved in analysis; e.g. sampling strategies, laboratory extraction or processing of plant material/soils for the creation of reference collections. In spite of this, counting procedures remain one of the areas that could be further developed. The aim of this paper is to assess representativeness of phytolith count size in archaeological samples and specifically to assess whether an increase in total number of individuals counted influences the number or distribution of morphotypes observed. Two statistical tests are performed to evaluate the representativeness of count size: phytolith sum variability analysis (PSVA) and morphotype accumulation curve (MAC). The analyses show the relationship among the number of counted phytoliths, the variability (that is, the number of different morphotypes identified) and the stabilisations of the MACs. Results allow us to support the standard count size in phytolith studies, which ranges from 250 to 300 particles. Together with a quick scan, this strategy should produce a precise and clear phytolith assemblage for archaeological studies. 相似文献
110.
A. A. Isayev L. V. Klimenko N. A. Myachkova Ye. I. Nesmelova V. N. Sorokina 《Eurasian Geography and Economics》2013,54(1):65-71
Basic climatic elements and factors of climate formation in the Central Economic Region are assessed with a view toward improving methods of short-term forecasting. More specifically, analysis of the spatial variation of radiation, evaporation, and turbulent heat transfer, patterns of the most economically significant climatic elements; and trends in temperature and precipitation relative to long-term means sets the stage for a discussion of problems in forecasting the length of the heating season and in predicting precipitation anomalies one year into the future (translated by Andrew R. Bond). 相似文献