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   1001篇
  免费   4篇
  2023年   4篇
  2022年   11篇
  2021年   20篇
  2020年   39篇
  2019年   23篇
  2018年   18篇
  2017年   32篇
  2016年   18篇
  2015年   20篇
  2014年   40篇
  2013年   130篇
  2012年   65篇
  2011年   70篇
  2010年   43篇
  2009年   56篇
  2008年   50篇
  2007年   56篇
  2006年   54篇
  2005年   66篇
  2004年   43篇
  2003年   37篇
  2002年   41篇
  2001年   21篇
  2000年   19篇
  1999年   6篇
  1998年   2篇
  1997年   2篇
  1996年   6篇
  1995年   3篇
  1994年   2篇
  1993年   3篇
  1992年   2篇
  1990年   2篇
  1981年   1篇
排序方式: 共有1005条查询结果,搜索用时 31 毫秒
1.
Palace lanterns were important and highly visible decorations in the imperial palace in Beijing, China, during the Qing dynasty (1636–1912). Most lanterns had colourful tassels made of fibres. The study performed a comprehensive investigation of the materials and dyes used for palace lantern tassels preserved in The Palace Museum, Beijing. Eight samples with different colours, including yellow, green and red, from five palace lanterns were analysed. By using ultra-performance liquid chromatography combined with time-of-flight mass spectrometry, the compositions of the dyes were identified quickly, and thus the dyes' origins were explored. A X-ray fluorescence spectrometer assisted in the detection of whether a mordant was used during the dyeing process. As a result, the tassels were all made of silk, discovered through the use of microscopic observation and micro-Fourier transform infrared spectrometry analysis. Different dyeing techniques were found in these tassels: yellow tassels were dyed by cork tree or turmeric by a direct dyeing method; greens were dyed by pagoda bud with an iron mordant, or by the combination of cork tree and indigo using multi-dyeing method; and red tassels were coloured with different acid red industrial dyes. These results provide valuable data for the conservation of ancient textile tassels and contribute to the investigation of other hanging tags.  相似文献   
2.
在明代,由于水患频发和长江主泓变动等原因,湖广武昌府城沿江江岸屡屡崩陷,当地政府遂启动江岸修筑工程。考诸史志,明代武昌府城的江岸修筑主要约有四次,分别是正统七年(1442)、成化三年(1467)、万历十七年(1589)和万历三十四年(1606)。最终修成的江岸,自武昌府城南门望山门外(今武昌解放路南端解放桥附近)起,向西折至江边,又沿江边中经黄鹤矶向下游延伸至坛角地区(今武昌和平大道武汉工人文化宫以西),长约5公里。这条堤岸确定了武昌城沿江江岸的基线,将武昌城的城市空间扩展到江边,并延续至今。  相似文献   
3.
张利杰  行龙 《史学集刊》2021,(2):106-117
解放太原战役期间战争双方均需在当地动用大量民力、物资,民众动员起着至关重要的作用。中国共产党与阎锡山集团往复争斗近十五年,彼此已相当熟悉,二者的动员模式、技术极其相似,但实践效果却判若两途。通过比较双方在政治宣传、民众保障、组织发动、思想教育等方面的动员活动,可见中国共产党的民众动员更贴合人们的需求,能够获得民众的自觉支持;反观阎锡山方面却是官民区隔、上下离心,浩大的动员声势常流于表面。二者迥异的组织能力和政党文化影响了实际动员效果。太原战役期间双方在动员中呈现的差异不啻是当时国共之别的重要缩影,也折射出左右两党最终胜败的内在原因。  相似文献   
4.
Merav Amir 《对极》2023,55(5):1496-1516
Israeli plans to partially annex West Bank territory have mainly been perceived as frustrating the two-state solution, and as putting Palestine/Israel on a path leading to the one-state alternative. This paper analyses partial annexation plans without assuming that the future of Palestine/Israel would necessarily abide by either statist resolution. It argues that by ostensibly distancing Israel's hold of the West Bank from an identifiable configuration of a belligerent occupation, partial annexation is offered to Jewish Israelis as a path for detaching the futurity of the two nations, and as a trajectory for normalising the Israeli state, without having to make what much of this public would see as painful concessions. It further explores settlers’ objections to such plans, claiming that even a partial incorporation of West Bank territory into formal Israel is expected to erode the exclusivity of Jewish domination which Israel has been upholding in its settler-colonial frontier.  相似文献   
5.
古铜矿遗址围岩表层有害生物的防治   总被引:3,自引:0,他引:3  
铜绿山古铜矿遗址地处长江中游地区、空气湿度大、围岩表层有害生物成片生长蔓延,对遗址的长期保护造成极大威胁。对此采取了改变遗址的环境条件、喷涂消杀药品的方法,消除了围岩表层有害生物的危害。经过一年半的观察表明该方法是可行的。  相似文献   
6.
The political public sphere is at one and the same time both public, and private and religion operates in both the public and the private spheres in the modern way of life. This article approaches the dynamics between the cultural and the political public sphere from the point of view of religion; how the cultural intelligentsia developed its worldview fuelled with attitudes towards religion in times of political turmoil. The case study, based on the empirical analysis of cultural periodicals and societies around them, concerns the Finnish liberal intelligentsia in the early twentieth century. The first decade of the 1900s was a particularly important period of formation for the Finnish public sphere; the societal turmoil highlighted the importance of cultural periodicals in defining what was important for the national public sphere. The case of religion is an illustrative example of it, particularly from the point of view of the liberal intelligentsia of the era.  相似文献   
7.
Springing off recent articles by Richard Hess and Russell Meek, this essay argues for the collaboration of vv. 1b and 4 to suggest that 1 Kgs 1,1-4 is concerned with discussing David’s impotency. In light of this physiological development, David’s attendants embarked on a search for a virgin. The Sumerian folktale “The Old Man and the Young Girl” may provide illumination for such an endeavor as it testifies to a perception that young women could rejuvenate impotent men. As for Adonijah’s pursuit of the throne, one can interpret a causative, albeit it implicit, relationship between 1,1-4 and vv. 5ff. David’s impotence rendered him unable to fulfill certain diplomatic duties, which had been a hallmark of his reign and rise to power. Such a development cast a shadow over the future of the administration, and ultimately, these four verses establish a sense of irony that will be revisited periodically throughout the history.  相似文献   
8.
基于手机信令数据的长春市活动空间特征与社区分异研究   总被引:2,自引:0,他引:2  
居民时空行为成为透视城市空间的重要视角,本文基于手机信令数据研究长春市活动空间及其社区分异,轮廓性的揭示居住空间、就业空间和消费休闲空间的分布规律,从人地互动的过程与格局的视角认识城市空间。研究发现,居住活动对中心城区依赖明显高于就业和消费休闲活动,就业活动呈现多中心连片发展格局,近郊的欧亚卖场和郊区的净月潭成为人们消费休闲活动的重要选择。就业-居住距离和消费休闲-居住距离的社区分异显著,折射出三类活动空间关系复杂,由此感知城市生活空间质量和社会空间结构。通过对社区分异的空间聚类分析明晰各地域自身问题,从而有针对性的对长春的空间调整优化和居民行为引导提出建议,构建和谐宜居的城市空间。  相似文献   
9.
广西桂平博物馆藏东汉铜甑对于研究广西地区青铜器冶铸技术的发展具有重要的研究价值。但器物长期保存于潮湿环境中,矿化严重、保存状况较差,亟须保护修复。本研究应用X射线影像观察、金相显微镜、扫描电镜及能谱分析、模拟实验验证等方法研究了器物的铸造工艺、合金成分以及锈蚀产物成分。结果表明该器物为整体铸造成形,器物铸造时使用了轮制技术、刮板造型工艺以及铸后刻纹的工艺,箅部范块制作过程是用器身模翻制器身范后脱模,将器身模的圈足部分切下,然后在圈足泥模上刻出箅部型腔。在此基础上,遵循最低限度干预原则,力求将传统的文物修复手段与现代修复理念相结合,通过除锈、修补等保护修复措施后,不但提高了器物的整体稳定性,而且达到了可以展陈,发掘文物潜在价值的要求。  相似文献   
10.
Two sets of twelve Portland limestone tablets were attached to carousels outside and under the open, lightweight shelter at Bishop’s Palace (Witney, England) for 18 months to assess the influence of shelters on soiling and microbiological growth on stone. At the start, and at 6-month intervals, tablets were analysed using microscopy (optical and SEM), colour measurement (spectrophotometry), weight change measurement and salt content determination (ion chromatography). Concentrations of NO2 and SO2 were also monitored for a month using diffusion tubes. In addition, results were compared with those obtained by the UK National Materials Exposure Programme (NMEP) on chemical weathering rates. Differences in soiling and biological growth on sheltered and unsheltered samples, and their influence on limestone decay were established. The shelter is likely to reduce biological growth by modifying the micro-environmental conditions. However, it may also exacerbate dust deposition, which might increase decay rates in the long-term.  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