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   2049篇
  免费   27篇
  2023年   12篇
  2022年   15篇
  2021年   19篇
  2020年   64篇
  2019年   33篇
  2018年   29篇
  2017年   33篇
  2016年   32篇
  2015年   50篇
  2014年   30篇
  2013年   111篇
  2012年   118篇
  2011年   176篇
  2010年   135篇
  2009年   207篇
  2008年   170篇
  2007年   193篇
  2006年   168篇
  2005年   133篇
  2004年   31篇
  2003年   76篇
  2002年   43篇
  2001年   45篇
  2000年   37篇
  1999年   20篇
  1998年   17篇
  1997年   10篇
  1996年   22篇
  1995年   9篇
  1994年   13篇
  1993年   11篇
  1992年   1篇
  1991年   10篇
  1990年   2篇
  1985年   1篇
排序方式: 共有2076条查询结果,搜索用时 31 毫秒
81.
在实地调查的基础上,根据传世典籍和出土文献的记载,结合年代测定、考古发现和遥感影像资料,通过空间分析,作者认为唐玉门关和墨离军驻地应在河西走廊西段的常乐故城,即今瓜州县“六工古城”遗址。这里是丝绸之路的交通枢纽,是西域出入口的重要关卡,亦即北魏时期新开伊吾道的起首。唐代玉门关地处疏勒河和榆林河下游洪积冲积扇缘的古绿洲,地貌和水资源等地理环境因素是制约关城选址的基础条件,而政治、军事等人文地理因素则是决定玉门关时空变迁的关键。  相似文献   
82.
王利华 《史学理论研究》2020,(2):74-86,158,159
中国古代先后两度出现性质相当不同的资源环境困境。第一次是西周至秦汉时期,主要表现为山林川泽自然资源不敷利用,资源困境的忧思催生了早熟的自然资源保护思想理论和礼法制度。第二次是清朝中期以后,“人口爆炸”造成的巨大资源(特别是土地)危机和生存压力,使18世纪末期(1790年)成为历史上的环境拐点,山区毁林开垦迅速显现出恶劣的环境后果,促使当时社会展开以山林保护为重点的环境保护思考和行动。两者之间是一个思想与行动都显得相对平淡和迟滞的阶段,但也有若干历史情节值得特别注意:一是围绕山林川泽之利,发生了国家从“专山泽之利”到放弃山泽垄断的制度变化;二是先秦诸子的自然观念和资源保护思想,在宋明理学中得到了一次明显升华。  相似文献   
83.
传统书画作品中存在有大量模糊不清的印章,对此类印章尚没有很好的手段进行提取和鉴别。为解决这一问题,本工作采用一种用高光谱图像系统采集书画中模糊印章的光谱-图像信息,采用最小噪声分离变换(MNF)处理光谱图像数据,提升了模糊印章的可辨识度。结果表明,采用该方法能够有效的将模糊印章的信息提取出来,有利于印章的鉴别和研究,为书画的文物价值和真伪鉴别的研究提供了科学有效的手段。  相似文献   
84.
This article examines disability as a contested notion of social inclusion by focusing on the blind songstress (guji) in early twentieth-century Guangzhou (Canton). Through personal memoirs, the print press, and institutional documents, this article reconstructs the social life of guji as their experiences intersected with professional community, workplace, and charity. First, I show that the adoption of blind girls from families into training guilds managed by veteran guji was a chosen kinship strategy for blind women since the late Qing period. Second, the commercial sponsorship of guji following the establishment of the Republic not only expanded working opportunities for blind women but also exposed their vulnerability to male-dominated entertainment spheres. Third, the reformist critique of guji as an inappropriate form of sex-related consumption pushed the nascent military government to collaborate with foreign missionaries in “rescuing” blind girls from their professional households. The experiences of guji thus reveal competing ideas of what qualified a disabled person to become a member of society at the beginning of the twentieth century, as work-based inclusion gave way to charitable inclusion as an outcome of shifting social attitudes toward the employment of women with disabilities.  相似文献   
85.
Editor’s Note     
Most previous studies have held that the system of Tubo gaoshen (an honorary identity mark) was an imitation of a similar system in the Tang dynasty, referring to the latter’s official costume decorations for its stratified office-holders. These studies have not given due attention to the characteristics of the title itself. From the perspective of the change of the Tibetan name and based on existing research results and historical records in both Tibetan and Chinese, this article tries to offer a new understanding and preliminary discussion on the development of Tubo gaoshen and several related issues. We find that there are two paths in the evolution of its name: One is from Sug to Yi Ge or Yig, the other is from Yig tsang to Yig tshangs. The former is used to denote a concrete gaoshen and can be added as a prefix while the latter denotes the abstract idea of gaoshen and no attribute can be used before it. When the two are used together, the latter is used before the former, such as in: yig tshangs pa ni zangs kyi yi ge gtong/ (As to the gaoshen [yig tshangs], [he] is awarded a bronze yi ge).  相似文献   
86.
87.
唐开元年间先后在渤海北境、黑水靺鞨地方设置勃利州、黑水军、黑水都督府。从文献与考古材料双重视角入手,可以对与黑水都督府建置有关的勃利州(渤州)、黑水靺鞨道、渤海都督府、安静都督府、黑水靺鞨思慕部等问题进行梳理和考索,又结合渤海与黑水靺鞨军事对抗导致黑水靺鞨自牡丹江中下游不断北移的历史背景,再考黑水都督府的具体地望。研究渤海都督府、安静都督府辖区以及黑水靺鞨思慕部相对位置关系,又考虑其为具有地区战略意义的和扼守渤海上京以北、贯穿南北黑水靺鞨交通孔道的军政重镇,萝北县江岸古城当为唐开元年间设置的黑水都督府治所所在。  相似文献   
88.
Zhen, Y.Y., Wang, G.X. &; Percival, I.G., August 2016. Conodonts and tabulate corals from the Upper Ordovician Angullong Formation of central New South Wales, Australia. Alcheringa 41, xxx–xxx. ISSN 0311-5518.

The Angullong Formation is the youngest Ordovician unit exposed in the Cliefden Caves area of central New South Wales. Its maximum age is constrained by a Styracograptus uncinatus graptolite Biozone fauna at the very top of the underlying Malongulli Formation, but the few fossils previously reported from higher in the Angullong Formation are either long-ranging or poorly known. From allochthonous limestone clasts in the middle part of the formation, we document a conodont fauna comprising Aphelognathus grandis, A. solidum, Aphelognathus sp., Aphelognathus? sp., Belodina confluens, Drepanoistodus suberectus, Panderodus gracilis, Panderodus sp., Phragmodus undatus, Pseudobelodina inclinata and Pseudobelodina? sp. aff. P. obtusa, which supports correlation with the Aphelognathus grandis Biozone (late Katian) of the North American Midcontinent succession. The species concepts of Aphelognathus and Pseudobelodina are reviewed in detail. Associated corals are exclusively tabulates, dominated by agetolitids, including Agetolites angullongensis sp. nov., Heliolites orientalis, Hemiagetolites breviseptatus, Hemiagetolites sp. cf. H. spinimarginatus, Navoites sp. cf. N. circumflexa, Plasmoporella bacilliforma, P. marginata, Quepora sp. cf. Q. calamus and Sarcinula sp. Affinities of the coral fauna from the Angullong Formation are closer to faunas from northern NSW and northern Queensland than to the locally recognized Fauna III of late Eastonian age in central NSW. We propose a subdivision of Fauna III to account for this difference, with the late Katian Fauna IIIB characterized by the incoming of agetolitid corals. The currently known distribution of representatives of this group with adequate age constraints suggests that agetolitids possibly originated in North China, subsequently migrating to Tarim, South China and adjacent peri-Gondwanan terranes while also spreading eastward to northern Gondwana, where they progressively moved through eastern Australia to reach the central NSW region by the early Bolindian.

Yong Yi Zhen* () and Ian G. Percival (), Geological Survey of New South Wales, W.B. Clarke Geoscience Centre, 947953 Londonderry Road, Londonderry, NSW 2753, Australia; Guangxu Wang (), State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, 39 East Beijing Road Nanjing 210008 PR China.  相似文献   
89.
星云大师对艺术的看法,集中在对建筑之形、书画之神与音乐之功的论述中.在星云大师看来,佛教建筑在外形上应具有简单、庄严、自然之特点;书画艺术之美在于能生动地传达生命与真情、慈悲喜舍的精神;佛教音乐应具有令身心安住、弘扬佛法的功用,这一并体现了星云大师倡导将佛教与艺文相结合的理念,期盼借助艺术的巨大力量而使佛法更加流通普照,净化世间.  相似文献   
90.
The Lv family tombs in Lantian, Shaanxi Province are one of the most important archaeological sites of China in recent years, providing numerous objects and a wealth of information for the study of the history of the Northern Song dynasty. There were a large number of exquisite cultural relics unearthed from the tombs, including one porcelain box containing white powder, which was identified as women's makeup. The phase composition, microstructure, thermal properties and characteristics of the trace elements in the unearthed white cosmetic powder were comprehensively analysed by X‐ray diffraction (XRD), scanning electron microscopy (SEM), differential scanning calorimetry – thermogravimetry (DSC–TG), Fourier transform infrared (FT–IR) microscopy and inductively coupled plasma atomic emission spectroscopy (ICP–AES). The white makeup powder was determined to be a product made from high‐quality freshwater pearls. These results, for the first time, showed evidence that freshwater pearl powder was used as a cosmetic in ancient China using archaeological objects, providing scientific evidence and new clues to enrich and expand research into the ancient Chinese cosmetic materials.  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