古代染料及其分析检测技术

纺织品考古具有百年历史,但纺织品科技考古是一个新兴的研究领域。其中,古代染料的分析检测可以提供天然染料的来源、相关染色方法,甚至纺织品文物的生产地点和时间等重要信息,从而为古代文物的修复和保护提供科学依据,且有助于了解古代纺织服饰的色彩文化。古代染料按颜色分可分为红色系染料、蓝色系染料和黄色系染料等,其中:红色系染料中植物染料较为常见的有红花、苏木和茜草等,动物染料主要有南美胭脂虫、克玫兹胭脂虫和紫胶虫等；蓝色系染料一般为靛青,主要从含靛植物中获得,中国历史上使用的含靛植物主要有马蓝、木蓝、蓼蓝和菘蓝；黄色系染料主要包括黄栌、槐米、黄檗和姜黄等。目前,用于古代染料分析检测的方法主要有光纤反射光谱(FORS)、荧光光谱(FS)、高效液相色谱-质谱联用(HPLC-MS)和表面增强拉曼光谱(SERS)技术等,这些方法具有各自特点,为纺织品文物上天然染料的研究提供了科学支持。     

明代隆昌寺无梁殿的动力特性及抗震性能研究

The brick - vault hall of Longchang Temple at Baohua Mountain is a representative of a series of Ming Dynasty brick - vault halls——a unique architectural heritage type in China. In order to evaluate the structural safety of this architectural heritage in earthquakes, we set up a three - dimensional finite element model to analyze its dynamic properties, seismic response spectrum and seismic time history in order to obtain the natural frequencies, modal modes, seismic effect, and seismic deformation and stress response. The results show that the structure of the hall features high symmetry and high torsional rigidity. The degrees of influence of earthquake on the vibration of the hall are as follows ： roof, side walls and arch on the second floor, eaves of the first floor, side walls and arch on the first floor. Under the Intensity 7 frequently - occurring earthquake, precautionary earthquake, and rarely - occurring earthquake, the most dangerous position of the hall is the junction of the arched window impost and sill wall on the side far away from the stairs on the first floor. In addition, prone to the tensile damage, each arch impost is a weak position in an earthquake. Finally, a seismic strengthening strategy for the brick - vault hall of Longchang Temple is presented based on the results of dynamic properties and seismic behavior analysis. © 2023, Sciences of Conservation and Archaeology. All Rights Reserved.     

法国巴黎集美博物馆藏克孜尔石窟壁画调查与原位考证

本文在前人研究基础上,结合笔者数十年的石窟工作经验以及远赴国外广泛调查的结果,将法国巴黎集美博物馆收藏的15块克孜尔石窟壁画残片进行了核对与测量,找到了全部壁画所出洞窟及原位,并通过电脑技术对图片进行了复原。