避暑山庄宫墙的历史变迁     

王嘉宁 《承德职业学院学报》2005,10(4):90-91

避暑山庄宫墙始建于康熙年间,宫墙长近十公里,又称虎皮宫墙.是避暑山庄不可分割的重要组成部分.  相似文献   

Investigations regarding the behaviour of historic glass and its surface layers towards different wavelengths applied for laser cleaning     

Farideh Fekrsanati  Stefan Klein  Jens Hildenhagen  Klaus Dickmann  Yiorgos Marakis  Aleka Manousaki  Vassilis Zafiropulos   《Journal of Cultural Heritage》2001,2(4):187

The application of lasers for the removal of superficial deposits from historic stained glass is a comparatively new field of scientific interest. Experimental studies concerning the behaviour of glass substrates and the corresponding superficial deposits towards different laser wavelengths were carried out. The experiments were performed using wavelengths of λ = 193 nm (ArF-Excimer), 308 nm (XeCl-Excimer), 355 nm (Nd:YAG third harmonic) and 1 064 nm (Nd:YAG fundamental) in comparison to λ = 248 nm (KrF-Excimer). This comparison is due to the fact that the present knowledge is based on the 248 nm wavelength. Specially prepared model glass samples representing the original fragments and samples of organic polymers (formerly used as a protective material for historic stained glasses) were used to study the effects of laser radiation and were subsequently characterised by optical microscopy.  相似文献   

自洁净玻璃的研究综述     

方向红 《安徽职业技术学院学报》2006,5(3):9-13

文章根据近年来国内外对自洁净玻璃的研究现状,对自洁净玻璃的研制方法、步骤进行了说明,对自洁净玻璃表面纳米氧化物薄膜的制备方法的研究进展状况进行了综述,并对其优缺点进行了比较。  相似文献   

Particle Penetration,Emission and Deposition in the Diocesan Museum in Udine,Italy to Assess Soiling of Giambattista Tiepolo’s Wall Paintings     

Chiara Bertolin  Marcin Strojecki  Roman Kozłowski 《文物保护研究》2018,63(5):326-328

  相似文献   

浅析《玻璃学士》的创作初衷     

邱晓静 《泰州职业技术学院学报》2011,11(3):37-39

在塞万提斯的《玻璃学士》一文中塑造了另一个堂·吉诃德,主人公一生坎坷,其功成名就反而是在疯癫之时,不可不谓之造物弄人。文章着重从主人公三段人生经历对其个性加以分析,以此分析作者的创作初衷。  相似文献   

Spectroscopic methods for the analysis of celadonite and glauconite in Roman green wall paintings     

Ligia Maria Moretto  Emilio Francesco Orsega  Gian Antonio Mazzocchin 《Journal of Cultural Heritage》2011,12(4):384

One set of samples from wall paintings of the X^th Regio of Italy containing green colours was analysed exploiting different spectroscopic techniques, aiming to identify the pigments used. The possibility to distinguish between glauconite and celadonite, the most common green pigments used in such paintings, was of particular interest. Samples of celadonite from Monte Baldo and glauconite from Belgium were considered as standard materials for comparison. The results obtained using FTIR, EDS, AAS, Colorimetry, Raman and EPR spectroscopies were compared for the identification of the green pigments.  相似文献   

基于多普勒频谱图的力量项目运动员左室舒张期室壁运动研究     

张戈  李献震  田金凯 《吉林体育学院学报》2016,(1):57-61

通过测定和比较正常人和力量项目运动员在静息和逐级递增负荷运动时，室壁多普勒频谱图上E波和A波峰值速度，研究左室后壁主动松弛和被动充盈功能的变化。结果表明：在静息状态，力量项目组房缩期心房收缩对于左室舒张充盈的贡献小于正常组；在逐级递增负荷中，力量项目组心脏舒张功能的动员表现为同时动用主动舒张储备和左房收缩储备，显示出心脏主动舒张的能力强，左房收缩储备大。  相似文献   

浅谈地下中空薄壁混凝土结构的裂缝防预构造措施     

滕先飞  裴锐 《辽宁科技学院学报》2015,(3):23-24

大尺寸薄壁钢筋混凝土结构,对温度的变化和基础的不均匀沉降较为敏感。制定合理的施工方案,材料的合理选择、施工流程精心组织保证了裂缝控制效果良好。  相似文献   

Light-induced cracking and abrasion of inkjet prints: Damage and mitigation     

Andrea Venosa  Daniel Burge  Eugene Salesin 《文物保护研究》2016,61(1):94-100

This study is part of a larger research project at the Image Permanence Institute dedicated to digital print preservation issues – the Digital Print Preservation Portal (DP3). Previous DP3 studies determined that certain digital print types are prone to cracking and/or abrasion, and that factors such as low relative humidity, pollutants, and light increase the brittleness of the ink-receiving layer of some inkjet papers. The purpose of this investigation was to explore if light also increases the propensity of inkjet prints to abrade, and to examine the potential of framing glazings to mitigate light-induced physical damage (cracking and abrasion) by attenuating some portion of the UV spectrum. Inkjet papers and prints were subjected to xenon lighting (to simulate daylight through window glass) without glazing, or in sealed framing packages with plain framing glass (soda-lime) or UV filtering glass. Before and after light exposure, brittleness, and abrasion resistance were evaluated independently using two tests: ISO 18907 (Imaging materials – Photographic films and papers – Wedge test for brittleness) and a rub test utilizing a Sutherland® Rub Tester. In this study, exposure to light increased the cracking and/or abrasion tendency of some specimens. The use of UV filtering glass reduced this light-induced propensity in all cases. Plain glass protected all samples from at least one of these two types of surface damage, but was less effective than UV glass. Light-induced brittleness and sensitivity to abrasion were mostly, though not exclusively, caused by UV radiation. It was also seen that some prints may become brittle and/or prone to abrasion in the absence of image fade. Budgeting the amount of light these objects can be exposed to, protecting them from UV radiation, and handling prints with caution especially after exhibition, is essential in order to limit physical damage.  相似文献   

建立一个安全的校园网访问控制体系   总被引：1，自引：0，他引：1  

程杰 《沈阳教育学院学报》2004,6(4):115-117

校园网在运行过程中面临各种安全威胁，本论文通过对校园网及其应用系统的访问控制体系问题进行分析，就身份认证、防火墙、文件和服务的共享访问以及封锁系统漏洞四个方面提出基于访问控制的安全策略。  相似文献