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   1233篇
  免费   66篇
  1299篇
  2024年   3篇
  2023年   28篇
  2022年   7篇
  2021年   17篇
  2020年   56篇
  2019年   59篇
  2018年   116篇
  2017年   89篇
  2016年   81篇
  2015年   59篇
  2014年   53篇
  2013年   173篇
  2012年   79篇
  2011年   70篇
  2010年   60篇
  2009年   79篇
  2008年   48篇
  2007年   45篇
  2006年   29篇
  2005年   40篇
  2004年   11篇
  2003年   18篇
  2002年   11篇
  2001年   16篇
  2000年   12篇
  1999年   4篇
  1998年   2篇
  1997年   7篇
  1996年   4篇
  1995年   10篇
  1994年   2篇
  1993年   3篇
  1992年   4篇
  1991年   1篇
  1982年   1篇
  1979年   1篇
  1962年   1篇
排序方式: 共有1299条查询结果,搜索用时 15 毫秒
51.
The Qhapaq-Ñan Project promotes the integration of shared cultural values among six countries: Argentina, Chile, Bolivia, Peru, Ecuador and Colombia. These countries are collaborating to nominate the Main Andean Road or “Qhapaq-Ñan” for inclusion on UNESCO’s World Heritage List. Although the participants envision local and Indian communities as the true beneficiaries of the project, and the archaeological effort is already under way, communities associated with the road have not been involved. (At the very moment we are editing this article (March 2007) Argentina is holding the first meeting about a project that is already five years old, with some of the Indian communities of the territories where the project will be carried out. The participation, however, was far below what we expected.). Following the guidelines of the World Archaeological Congress and the current emphasis of many heritage professionals on community participation, we strongly advise that these dynamics must be changed and that the program must be developed jointly with affected communities from the beginning of the project and not in subsequent steps, or (even worse) once the project already taken shape.  相似文献   
52.
The remains of the fragmented skeleton of a mature male individual from a Neolithic mass burial (ca. 5000 years BP) are presented. The lesions consist of osteoblastic proliferation and replacement of previously normal haematopoietic tissue. The most affected area seems to have been the iliac blade. So-called ‘seeding’ of tumour tissue has been found in different loci in the femoral neck, sacrum, L4 and scapula. Differential diagnosis points to metastatic carcinoma, most likely from the prostrate gland. In order to support the observations, radiological and histological analyses have been performed. Trace element analyses of tumour and control samples have shown the limited contribution of these data to ascertain the aetiology of secondary neoplasias in buried material.  相似文献   
53.
D. Han  L. Ma  S. Ma  J. Zhang 《Archaeometry》2020,62(1):200-212
The No. 2 Qin bronze chariot unearthed from Qinshihuang's Mausoleum is world famous for its huge size and colourful painted patterns. However, since it had been buried for a long time and was affected by its harsh environment, its painted patterns have been severely damaged. The traditional restoration methods, which mainly rely on expert experience, are manual, inefficient and lack scientific support. Moreover, to protect the important cultural relics, any invasive operations, such as sampling analysis, are strictly prohibited. This paper presents a method that combines hyperspectral imaging and computer technology for the digital virtual restoration of the bronze chariot's patterns. It is non-destructive, more efficient and more scientific. The method reproduces the damaged patterns with the following approaches: restoring the missing edges of the patterns; and distinguishing the different pigments. The obtained result implies that the method can digitally reproduce some of the damaged patterns, and that it can be used as a reference for recreating the patterns of the other painted bronze.  相似文献   
54.
撒拉族是一个古老的民族,主要生活在青海省循化撒拉族自治县。撒拉族刺绣是撒拉人以勤劳和智慧创造的一门艺术,不仅形式多样,工艺精湛,更因其丰富的内涵而大放异彩。没有文字的撒拉族,天才地运用了刺绣,表达民族迁徙、民族生息繁衍的历史,再现风情民俗,寄其精神向往。  相似文献   
55.
56.
服务蓝图:国际上最新旅游服务设计方法   总被引:4,自引:0,他引:4  
服务设计是服务质量管理的重要环节,良好的服务设计是保障服务质量的先决条件。服务蓝图是现今国际上极为流行的服务设计方法,本针对旅行社的具体情况,以案例形式介绍这种先进方法。  相似文献   
57.
马杰  李刚峰 《攀登》2005,24(6):26-29
本文通过对青海省十个五年计划(“一五”-“十五”)的简要回顾,指出中长期规划在全省国民经济和社会发展中具有重要作用。进而提出对“十一五”乃至今后中长期规划编制的几点有益的启示。  相似文献   
58.
上世纪后半叶西安郊区出土四批八件银香球,其内部结构设计奇巧,设计原理与现代陀螺仪中的万向支架相同。在马穆鲁克王朝统治下的埃及和叙利亚,金属匠师对唐代香球进行了非常精确的仿制。13-15,世纪香球及其制造技术西传欧洲,对其时的科学技术发展产生了深远影响。  相似文献   
59.
The implementation of a 3D Electrical Resistivity Tomography (ERT-3D) survey was carried out in El Pahñú archaeological site, Hidalgo State, Central Mexico. A combination of a new ERT arrays allowed studying the subsoil beneath the Main Pyramid built near the edge of a plateau, along with another important structure (the Tecpan), which was a smaller structure that lodged the governmental council in pre-Hispanic times. The recorded information was acquired through the combination of several electrodic designs: L-Corner (LC), Equatorial (Eq), and Minimum Coupling (MC). For the Main Pyramid, the electrodes were set up around the perimeter of the structure, since they were not permitted to be inserted over the edifice, thus preventing damages to the architectonic elements. The second structure allowed inserting electrodes on selected spots within the architectonic space. The combination of the different arrays made possible the acquisition of 1204 apparent resistivities beneath the Main Pyramid and 2460 resistivity data beneath the Tecpan. The apparent resistivity data were inverted to obtain a three dimensional display of the subsoil electrical resistivity beneath the archaeological structure. The interpreted resistivity model under the Main Pyramid displayed a highly resistive structure towards its northern face that could be associated with infill. Such material was employed by the ancient constructors to level the terrain close to the edge of the cliff. Another interesting anomaly was found towards the central portion of the structure that could be associated to a foundation offer. The interpretation of data beneath the Tecpan identified the structural foundations and other interesting anomalies related to the different occupational times. The investigation supported the archaeological investigation of the site, suggesting areas of potential geological risk and of archaeological interest. For example, the Main Pyramid presents serious stability problems, indicating that the infill has weakened, producing cracks threatening long-term pyramid integrity.  相似文献   
60.
The phenomenon of equifinality complicates behavioral interpretations of faunal assemblages from contexts in which Pleistocene hominins are suspected bone accumulators. Stone tool butchery marks on ungulate fossils are diagnostic of hominin activities, but debate continues over the higher-order implications of butchered bones for the foraging capabilities of hominins. Additionally, tooth marks imparted on bones by hominins overlap in morphology and dimensions with those created by some non-hominin carnivores, further confounding our view of early hominins as meat-eating hunters, scavengers or both. We report on the manual/oral peeling of cortical layers of ungulate ribs as taphonomically diagnostic of hominoid/hominin meat- and bone-eating behavior that indicates access to large herbivore carcasses by hominins at the site of BK, Olduvai. Supporting these inferences, we show that certain types of rib peeling damage are very rare or completely unknown in faunas created by modern carnivores and African porcupines, but common in faunas modified by the butchery and/or consumption activities of modern humans and chimpanzees, during which these hominoids often grasp ribs with their hands, and then used their teeth to peel strips of cortex from raggedly chewed ends of the ribs. Carnivores consume ungulate ribcage tissues soon after kills, so diagnostic traces of hominin butchery/consumption on ribs (i.e., peeling and butchery marks) indicate early access to ungulate carcasses by BK hominins. Tooth marks associated with the peeling and butchery marks are probably hominin-derived, and may indicate that it was not uncommon for our ancestors to use their teeth to strip meat from and to consume portions of ribs. Recognition of rib peeling as a diagnostic signature of hominoid/hominin behavior may also aid the search for pre-archaeological traces of hominin meat-eating.  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