全文获取类型
收费全文 | 5865篇 |
免费 | 150篇 |
出版年
2020年 | 50篇 |
2019年 | 98篇 |
2018年 | 385篇 |
2017年 | 306篇 |
2016年 | 345篇 |
2015年 | 98篇 |
2014年 | 89篇 |
2013年 | 1349篇 |
2012年 | 164篇 |
2011年 | 270篇 |
2010年 | 322篇 |
2009年 | 186篇 |
2008年 | 161篇 |
2007年 | 235篇 |
2006年 | 101篇 |
2005年 | 91篇 |
2004年 | 64篇 |
2003年 | 56篇 |
2002年 | 65篇 |
2001年 | 74篇 |
2000年 | 55篇 |
1999年 | 64篇 |
1998年 | 66篇 |
1997年 | 50篇 |
1996年 | 57篇 |
1995年 | 45篇 |
1994年 | 51篇 |
1993年 | 48篇 |
1992年 | 41篇 |
1991年 | 37篇 |
1990年 | 25篇 |
1989年 | 42篇 |
1988年 | 38篇 |
1987年 | 55篇 |
1986年 | 39篇 |
1985年 | 41篇 |
1984年 | 53篇 |
1983年 | 47篇 |
1982年 | 37篇 |
1981年 | 44篇 |
1980年 | 54篇 |
1979年 | 49篇 |
1978年 | 30篇 |
1977年 | 52篇 |
1976年 | 37篇 |
1975年 | 38篇 |
1974年 | 23篇 |
1972年 | 25篇 |
1970年 | 23篇 |
1969年 | 22篇 |
排序方式: 共有6015条查询结果,搜索用时 125 毫秒
951.
952.
In Picturing Heaven in Early China,a consideration of the symbolism of Heaven in early Chinese culture,Lillian Lan-ying Tseng examines the evolution of a pictorial language for the expression of "religious" ideals.By analyzing the architectural,material and literary evidence from the Han dynasty,the author traces the trajectory of Han thought from its first concerns with the notion of Heaven and the involvement of the emperor,to the growing desire for personal immortality at all levels.The book comprises five chapters,which plot the development of Han thought and images of heaven.This is a complex and well-researched examination,whose depth and detail can only be suggested here. 相似文献
953.
Kooiman Susan M. Albert Rebecca K. Malainey Mary E. 《Journal of Archaeological Method and Theory》2022,29(3):795-830
Journal of Archaeological Method and Theory - The application of multiple lines of evidence is necessary to understand past complex behaviors such as diet and cuisine. This paper advocates for the... 相似文献
954.
马的驯化及使用深刻影响到人类文明的进程。马不仅为人类提供肉、奶等蛋白性食物,而且极大地提高了人类运输和战争能力,推进了人类的迁徙、民族的融合、语言和文化的传播等等。可以说,没有一种家畜像马一样,在战争、运输和人类社会交往方面,发挥出如此重要的作用。骑乘无疑是人类使役马匹的重要方面。如何研究遗址出土的马骨,探讨其是否被骑乘,一直是考古学家关心的课题。本文的作者玛莎·莱文(Marsha Levine)博士等运用古病理学对马的利用方式进行了探讨,研究了马的被骑乘与否和马的第11-18胸椎异常之间的关联。他们对比了未被人骑乘的现代马骨和明确被人骑乘的早期铁器时代和中世纪的马骨,认为在早期铁器时代的马胸椎上出现的异常模式很可能与骑乘有关,从而表明从动物古病理学的角度探讨古代人类对家马的利用是切实可行的,这一研究思路非常值得我们借鉴。动物古病理学研究在国外开展已久,然而这一研究在国内尚十分薄弱,这正是我们今后努力的方向之一。 相似文献
955.
E. GLIOZZO M. TURCHIANO M. LOMBARDI I. TURBANTI MEMMI G. VOLPE M. J. BAXTER 《Archaeometry》2013,55(3):423-448
Late Antique coarse cooking wares and painted fine wares found at Herdonia (second half of the fourth century to mid‐fifth century ad ) and Canusium (late sixth century to early seventh century ad ) have been chemically and mineralogically characterized. A total of 74 samples (40 of coarse ware and 34 of fine painted ware) was investigated through optical microscopy, scanning electron microscopy, X‐ray powder diffraction, inductively coupled plasma optical emission spectrometry, inductively coupled plasma mass spectrometry, neutron activation analysis and X‐ray fluorescence. A new statistical method, namely the classification tree methodology, was used for the treatment of geochemical data. The characterization of the Herdonia and Canusium assemblages was combined with a review of earlier results obtained for San Giusto and Posta Crusta, in order to get an insight on Late Antique ceramic trades in northern Apulia. It appears possible to reconstruct a production pattern organized at multiple production sites, both rural and urban, that exploited similar raw material deposits, specialized in certain productions, and commercialized products at different geographical scales. Imports from outside northern Apulia may be identified for coarse wares. A likely area of production is difficult to establish; however, the northern Adriatic coast and the area of Greece may be suggested. 相似文献
956.
D. HRADIL J. HRADILOVÁ E. KOČÍ S. ŠVARCOVÁ P. BEZDIČKA J. MAŘÍKOVÁ‐KUBKOVÁ 《Archaeometry》2013,55(4):691-706
Pre‐Romanesque murals at Kosto?any pod Tríbe?om, Slovakia, have been investigated by portable X‐ray fluorescence and by microanalytical methods to identify painting materials (pigments and binders), and to explain the degradation of colours. Today, missing green and blue shades have been reconstructed according to residual concentrations of Cu, which correspond to copper chlorides—products of salt corrosion of the copper carbonates azurite and/or malachite, accelerated by micro‐organisms. As confirmed by powder X‐ray microdiffraction, original minium (Pb3O4) has been transformed to brown–black plattnerite (PbO2). In increased humidity, even insoluble pigments are washing down from the walls and the intensity of colours further diminishes. 相似文献
957.
Gang Meng G. Brent Hall Mary E. Thompson Patrick Seliske 《The Canadian geographer》2013,57(2):154-172
This study assesses the overall spatial variations and neighbourhood‐level “hot spots” of low birth weight and preterm birth incidence within three public health units in Ontario, Canada. The analysis uses a stepwise approach of intra‐class correlation analysis, a spatial scan statistic, and multilevel spatial modeling. Results show that neighbourhood level variation accounts for only 2–3 percent of the total variation of adverse birth outcomes in the study area. However, strong spatial autocorrelation is observed at the neighbourhood level, and spatial clusters of relatively high adverse birth outcome rates exist in areas that are associated with environmental risks, including pollution sources and proximity to highways. Thus, although estimated neighbourhood impacts on adverse birth outcomes are small compared with those of individual‐level risks, local high potential environmental risk areas are identifiable. Environmental surveillance and spatial statistical analysis should be conducted regularly by local health authorities to identify and monitor the impact of environmental changes on health in general and on birth outcomes in particular. Specific community‐oriented health interventions may be required to reduce observed local health impacts. 相似文献
958.
Identification of the volcanic material (pozzolan) stored in a Roman ship of the fourth to third century bce , wrecked in the ancient harbour of Pisa (central Italy), was based on ratios of selected trace elements. The compositions of the major volcanic products erupted by the volcanoes of the Roman province, including the volcanic districts of Latium (Vulsini, Vico, Monti Sabatini and the Alban Hills) and Campania (Roccamonfina, the Phlegraean Fields, Ischia, Procida and Vesuvius) are compared with the pozzolan from the Pisa ship. Superposition of the Zr/Y, Nb/Y and Nb/Zr ratios of the pyroclastic material from the wrecked ship (computed from the published literature) allows correlation with the products of the Onano eruption from the Vulsini Volcanic District. The Vulsini rocks outcrop extensively in a sector drained by the hydrographic network of the Fiora River, which has been a well‐developed commercial water trade route since Etruscan times, with a river port and a sea port connected to the important town of Vulci, and, since 273 bce , part of the larger Roman harbour system of Cosa. 相似文献
959.
Archaeological bone undergoes alterations after burial (diagenesis) that constitute a problem for the survival of archaeological information. A common method to assess this alteration is Fourier transform infrared spectrometry (FTIR). However, the commonly applied method (FTIR–KBr) is destructive and sample preparation may influence the results. This paper tests the suitability of FTIR attenuated total reflection (FTIR–ATR), a method not commonly used to investigate bone diagenesis. FTIR–ATR requires less sample preparation and can be non‐destructive, allowing analysis of bone cross‐sections. Modern and archaeological bones were analysed using both methods and different sample preparation methods were tested. The results show that FTIR–ATR has advantages for the rapid assessment of bone diagenesis. 相似文献
960.
This study explores the potential of carbon and oxygen isotope data from human enamel carbonate (n = 50) to contribute to mobility studies in the Caribbean. Most oxygen and carbon isotope results display limited variation, with substantial overlap between islands. However, a few individuals from El Chorro de Maíta, Cuba possess relatively low δ18O and high δ13C. Two of these individuals were previously identified as possible non‐Antillean immigrants on the basis of strontium isotopes, and bioarchaeological and mortuary evidence. The carbon and oxygen isotope results provide additional evidence supporting the proposed non‐local origins of these individuals and contribute to explorations of their potential natal origins. 相似文献