首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2589篇
  免费   321篇
  2024年   3篇
  2023年   14篇
  2022年   16篇
  2021年   32篇
  2020年   69篇
  2019年   119篇
  2018年   89篇
  2017年   85篇
  2016年   137篇
  2015年   124篇
  2014年   107篇
  2013年   337篇
  2012年   163篇
  2011年   214篇
  2010年   174篇
  2009年   174篇
  2008年   175篇
  2007年   159篇
  2006年   154篇
  2005年   96篇
  2004年   52篇
  2003年   65篇
  2002年   48篇
  2001年   36篇
  2000年   52篇
  1999年   23篇
  1998年   36篇
  1997年   24篇
  1996年   26篇
  1995年   22篇
  1994年   17篇
  1993年   8篇
  1992年   6篇
  1991年   7篇
  1990年   3篇
  1989年   2篇
  1987年   3篇
  1986年   3篇
  1985年   3篇
  1984年   3篇
  1982年   6篇
  1980年   3篇
  1979年   2篇
  1977年   6篇
  1976年   2篇
  1974年   2篇
  1971年   1篇
  1969年   1篇
  1968年   1篇
  1951年   1篇
排序方式: 共有2910条查询结果,搜索用时 312 毫秒
961.
Detailed archaeozoological studies of Middle and Early Upper Palaeolithic (250–40 kya) faunal assemblages from Tabun, Skhul and el‐Wad caves, located in Mount Carmel (Israel), are presented here, expanding on the previous palaeontological analyses carried out by Garrod and Bate in the 1930´s and by Garrard five decades later. Despite the well‐known excavation bias of the older excavations, this study makes greater use of modern taphonomic techniques and statistical procedures, providing new palaeoeconomic insights into the subsistence behaviour of modern humans, Neanderthals and their predecessors in the Levant. The results show that anatomically modern humans (AMH) were more efficient at hunting and foraging in terms of human mobility as well as an incipient prey specialisation. In addition, different uses of the Tabun cave through time have been identified. Tabun B, initially considered as a palaeontological accumulation, was also occasionally accessed by Neanderthals in order to exploit naturally trapped ungulates, and there were sporadic and logistic occupations in Tabun D, one of the oldest Middle Palaeolithic assemblages in the area. Contrastingly, Tabun C showed a comparatively more residential use, which coincided with the new mobility capabilities of AMH. Whereas the intensity of human occupation at el‐Wad varied through time, levels G and F showed very brief occupations in comparison with levels D and E, which showed abundant evidence of human activity. Copyright © 2011 John Wiley & Sons, Ltd.  相似文献   
962.
963.
As part of a larger project promoting the development of historical dendrochronology in the Iberian Peninsula, ship‐timbers from the Arade 1 wreck (mostly planking and framing elements), stored at the DANS/IGESPAR in Lisbon, were examined. Of these, 52 samples were identified as deciduous oak (Quercus subg. quercus) and two as chestnut (Castanea sativa). Of 24 timbers selected for dendrochronological research, 23 could be dated, placing the origin of the wood in western France and the felling of trees between AD 1579 and 1583. Their homogeneity suggests they are part of the original construction, which probably took place shortly after AD 1583. © 2012 The Authors  相似文献   
964.
965.
本文以北京明、清典型官式琉璃构件的黄釉为研究对象,利用EDXRF分析了釉料的化学组成,结合文献记载初步研究了北京明清官式琉璃构件釉料的变化规律。研究结果表明,明清琉璃黄釉的主要元素(硅、铅、铝、铁)含量在一定范围内稍有波动,氧化铅含量有逐渐降低的趋势。此外,明清釉料中氧化铝含量变化大体经历了由低到高,再由高到低的过程。从氧化铁的变化趋势来看,明代的釉料大体稳定,而清代则经历了由低到高的过程。这表明古代琉璃釉料的配方并非墨守成规、因循守旧,而是受技术进步、窑炉、政治经济等级审美观念的多重影响,古代匠人在不断的摸索中改进配方。  相似文献   
966.
对文物博物馆管理体制创新的思考   总被引:1,自引:0,他引:1  
文物托管、博物馆托管触及博物馆行业的最敏感问题即文物资源匮乏、国家小型博物馆及民营博物馆如何很好地发挥作用。文物托管是对社会文物资源的整合,有利于文物的保护和管理。博物馆托管是有效的管理机制的推广,是行业内部对博物馆各种资源要素的优化。文物托管是社会流散文物登记的一种形式,为建立合理的社会流散文物保护管理体制而探索创新。  相似文献   
967.
968.
Chen, J., Beattie, R., Wang, B., Jiang, H., Zheng, Y. & Zhang, H., 12 April 2019. The first palaeontinid from the Late Jurassic of Australia (Hemiptera, Cicadomorpha, Palaeontinidae). Alcheringa 43, 449–454. ISSN 0311-5518.

Palaeontinidae, an extinct group of large arboreal insects, has the most diverse record among the Mesozoic Hemiptera, but only a few taxa have been reported from the Southern Hemisphere. Herein, Talbragarocossus jurassicus Chen, Beattie & Wang gen. et sp. nov., one of the earliest representatives of ‘late’ Palaeontinidae, is described and illustrated from the Upper Jurassic Talbragar Fossil Fish Bed in New South Wales, Australia. This new taxon constitutes the first representative of Palaeontinidae in Australia and the first Jurassic example in Gondwanaland, providing significant distributional and stratigraphic extensions to the family.

Jun Chen*? [] and Yan Zheng? [], Institute of Geology and Paleontology, Linyi University, Shuangling Road, Linyi 276000, China. Bo Wang? [], Hui Jiang [] and Haichun Zhang [] State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing 210008, China. Robert Beattie [], Australian Museum, 1 William St., Sydney, NSW 2010, Australia. ?Also affiliated with: State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing 210008, China. ?Also affiliated with: Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals, Shandong University of Science and Technology, Qingdao, Shandong 266590, China.  相似文献   
969.
Zhang, Y.C., Wang, Y., Zhang, Y.J. & Yuan, D.X., 2013. Artinskian (Early Permian) fusuline fauna from the Rongma area in northern Tibet: palaeoclimatic and palaeobiogeographic implications. Alcheringa 37, 529–546. ISSN 0311–5518.

A fusuline fauna consisting of ten species in five genera from the Qudi Formation of the Jiaomuri and Gangtangcuo sections in the Rongma area, northern Tibet, is described. This fauna contains a few typical Peri-Gondwanan fusuline species such as Pseudofusulina pamirensis, Neodutkevitchia insignis and N. sp. cf. N. tumidiscula. The fauna is dated as Artinskian based on the presence of both genera Chalaroschwagerina and Praeskinnerella. The Peri-Gondwanan fusuline fauna in the Qiangtang Block is grouped palaeobiogeographically into the Southern Transitional Zone, which is located in the southern part of the Peri-Gondwanan blocks during the late Sakmarian and Artinskian. Moreover, the occurrence of the Peri-Gondwanan fusuline fauna, the lithological transition from glacimarine deposits to carbonates, and the Peri-Gondwanan fusulines’ apparent southeastward migration from the Kalmard Block of central Iran during the Artinskian, are interpreted here to be the result of global warming after the peak of the Late Palaeozoic Ice Age.

Yi-chun Zhang [geozyc@yahoo.com], School of Life and Environmental Sciences, Deakin University, Melbourne Burwood Campus, 221 Burwood Highway, Burwood, Victoria 3125, Australia; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, 39 East Beijing Road, Nanjing 210008, PR China; Yue Wang [yuewang@nigpas.ac.cn], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, 39 East Beijing Road, Nanjing 210008, PR China; Yu-jie Zhang [zebiac@163.com], Chengdu Center, China Geological Survey, 2 Renming Road North, Chengdu 610081, PR China; Dong-xun Yuan [yuanzi55@163.com], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, 39 East Beijing Road, Nanjing 210008, China; Department of Earth Sciences, Nanjing University, 22 Hankou Road, Nanjing 210008, PR China. Received 12.3.2013; revised 2.5.2013; accepted 12.5.2013.  相似文献   
970.

This paper is a comparison between two books, each dealing with the history of a different rural community in Northern Norway. These are Fjordfolket i Kvænangen and Balsfjorden og Malangens historie (Volume 1) written by the social anthropologist Ivar Bjørklund and the historian Anders Ole Hauglid respectively. In this comparison, two main points are emphasized: (1) To what extent can knowledge about ethnic processes of categorization, which has been acquired through contemporary research in the social sciences, be of use in the writing of the history of minorities? (2) Should the history of a minority only be a history of ethnic relations'?  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号