基于三维扫描模型的兵马俑足踝有限元分析

利用三维扫描技术获取兵马俑残片的三维点云数据,结合Geomagic Studio和Hypermesh建立高精度的兵马俑足踝残片三维实体网格模型。通过基于ABAQUS的重力作用下的有限元分析,研究足踝部分的Von Mises应力和变形特征,以确定足踝处的受力薄弱部位。为进一步探究模型各残片的最佳点云简化比例,采用点云简化模型进行相同工况的有限元分析,以验证点云简化的可靠性。结果表明:结构在重力作用下可保持安全稳定的状态,相对薄弱部位位于左腿足踝处;对于大部分残片,其最佳简化比例在60%～70%,简化后可有效缩短模型实体化处理时间;采用简化模型得到的有限元结果,其最大Mises应力相比于原始模型的误差小于15%,且应力云图和变形图形状接近,模型简化具有可靠性。     

一种油画颜料层裂纹的修复技术分析

油画颜料层裂纹是一种常见的病害类型,严重的裂纹会影响作品的视觉效果。裂纹修复所采取的措施应以缓解病害,延续寿命为目标,避免不当修复对其文物价值的改变。本研究通过红外光谱和便携式X荧光能谱分析,初步确定了裂纹产生的原因与材料技法和机械作用力有关,长期的温湿度波动则是最终形成老化裂纹的重要因素。对两类常见的裂纹加固方法比较后得出结论,色蜡改变了原画的光泽度和肌理层,动物胶调碳酸钙更适宜作为裂纹的填补材料。观察修复后的油画保存状况,发现经过修复的颜料层仍存在继续劣化的风险,必须维持保存环境的相对稳定,方可延长修复周期。     

Investigating Human Migration and Horse‐Trading in Yelang (夜郎) Through Strontium Isotope Analysis of Skeletons from Zhougshui Sites,South‐West China (1300 bc – ad 25)

Yelang (夜郎), a mysterious state located in the south‐western area of early China and dating from the Bronze Age to the Early Iron Age (1300 bc – ad 25), is a cultural interactive junction between the Yunnan–Guizhou Plateau and the Yangtze River Basin. The Zhongshui Basin in Weining County, Guizhou Province, was one of the important distribution areas of the Yelang civilization. This area, which includes sites at Jigongshan (鸡公山; 1300 – 800 bc ), Hongyingpan (红营盘; 700 – 400 bc ) and Yinzitan (银子坛; 400 bc – ad 25), has provided a very integrated chronology, spanning from the Bronze Age to the Early Iron Age in the eastern Yunnan – western Guizhou area. To investigate human migration and horse‐trading at these Yelang sites, we conducted a strontium isotopic analysis on the teeth enamel of humans and horses unearthed from these three sites. The results indicated the following: (1) people at the earlier sites (Jigongshan and Hongyingpan) were all indigenous, whereas in the Yinzitan cemetery, there was a more immigrant population, and all the people who were buried in an upper limb flexed supine position were non‐local; and (2) most of the horses found at the Jigongshan and Yinzitan sites show different provenances, probably related to the famous Dian (滇) and Zuo (筰) horses recorded in historical documents, providing more clues for further study on horse‐trading in South‐West China during the Bronze Age and the Early Iron Age.     

博物馆女性题材展览的类型与意义

女性题材的展览主要分为女性博物馆的基本陈列和专题展览、综合类博物馆的常设展览和临时展览,旨在以"物"为媒介来展示女性的生存状态和精神追求,与公众一起讨论有关女性的话题,甚至包括一些敏感的、有争议的现象或问题。博物馆以女性为题材,组织展览和教育活动,关注、探讨并传播女性文化,一方面反映出博物馆关注并回应女性广泛参与社会生活并贡献于社会变革与发展的现实,发挥博物馆作为时代潮流倡导者和引领者的作用;另一方面,女性观众数量增多,参观需求多元化且女性广泛参与博物馆事务,对博物馆展览理念也产生一定的影响。然而,博物馆的女性主题展览也存在数量少、展览和诠释活动中对女性价值和意义挖掘不够等问题,需要在理念和实践上进一步改变。     

关于中小型汉墓研究的思考

随着中小型汉墓资料的日益丰富,其研究思路和体系需要拓展和创新。研究广度方面,汉墓的分区研究需要完善,要用更广阔的视野进行对比研究;研究高度方面,需要对中小型汉墓进一步解读,上升至对社会制度和历史发展规律的探讨;研究深度方面,对中小型汉墓的研究需更加细致化,科技分析方法要更多地应用其中。     

破土器、庖厨刀或铡草刀——长江下游新石器时代及早期青铜时代石器分析之二

三角形石刀是长江下游地区良渚文化和青铜时代早期文化的一种特殊形状的石器,其功能众说不一,不少考古学家认为它是作为农业工具使用的"破土器"。通过对浙江湖州毘山遗址出土的两件商代三角形石刀进行微痕分析,并与采用复制石器进行实验考古后所得到的微痕进行比较,可知,毘山三角形石刀不是"破土器",而可能是用来切断植物茎叶的铡刀。     

On evolutionary economic geography: a literature review using bibliometric analysis

During the past few decades, there has been growing attention paid towards evolutionary economic geography (EEG) perspectives, methodologies, and concepts in various disciplines such as geography, urban studies, and regional science. In order to better understand the development of EEG studies, this paper employs multiple bibliometric analyses. Specifically, it examines the temporal evolution of keyword co-occurrence network and the reference co-citation network of EEG publications during the last few decades to reveal the temporal evolution and spatial distribution of EEG publications, scholarly communication, research fronts, and intellectual structure of the scientific field.     

Rejoinder to Professor Ho’s team on the article entitled ‘On evolutionary economic geography: a literature review using bibliometric analysis’

Professor Ho’s team has raised three questions about our paper entitled ‘On evolutionary economic geography: a literature review using bibliometric analysis’ published in European Panning Studies. The first one is about the number of articles in our search results. The second one is about the databases we have used in the Web of Science system. In the last comment, Professor Ho suggests a new searching strategy – ‘front page’ rule. We have responded to those three comments one by one in this rejoinder.     

让材料自己说话——浅论当前历史传记写作的一种趋势

《陈寅恪的最后二十年》、《顾颉刚和他的弟子们》、《束星北档案》等著作,代表了当前历史传记写作的一种趋势。《陈寅恪的最后二十年》的文本近似历史叙事散文;《顾颉刚和他的弟子们》的文本更接近史学论文;而《束星北档案》则类同电视记录片的文稿。这些著作共有的特点是:在修撰方式上,大量运用了第一手材料;在文本风格上,力求作品深入浅出、雅俗共赏;在写作理念上,坚持真实第一,尊重历史。这一趋势非常值得重视。