工夫深处渐天然 齐白石《六虾图》赏析

齐白石《六虾图》,作于1948年,是齐白石绘予抗日民族英雄董其武将军的作品。画幅纵102.8、横34厘米,富有气势。齐白石写此作时,年88岁,正值艺术创作顶峰时期,6只＂白石虾＂跃然纸上,水墨淋漓,栩栩如生,焕发出永恒的艺术之美。齐白石写虾的作品中,     

四川盐源县古代盐业与文化的考古调查

地处中国四川省西南部凉山彝族自治州的盐源县自古以来就有着多样的生态环境和丰富的自然资源,同时其独特的古代文化面貌也呈现出非常复杂的情形。而当地丰富的盐业资源以及其具有鲜明地域特征的青铜文化为古代西南边地盐业考古及人地互动发展关系研究提供了非常重要的资料。为了配合"中国古代盐业考古课题的开展"(指南针计划项目之一),成都文物考古研究所就所承担的     

THE PEACEFUL LIBERATION OF TIBET IS A SPLENDID CHAPTER IN THE UNIFICATION OF THE CHINESE NATION——An Interview with Mr.Zhu Weiqun,the Vice Minister of the United Front Work Department of the Central Government of China

<正>On the occasion to celebrate the signing of the"Seventeen Articles Agreement"and the 60th anniversary of the peaceful liberation of Tibet,at the request of t...     

河北及京津地区早中全新世文化的时空分布及其气候环境因素

本文根据考古学14C年代数据和考古遗存情况,结合高分辨率的地层和古气候研究资料,分析了河北及京津地区早中全新世文化的时空分布格局以及影响遗址分布的地貌和气候因素。该地区早中全新世文化时间序列为:早期新石器时代文化(10,000~8,800 yr BP)、新石器早中期之间的文化缺环(约8,800~7,300 yr BP)、7,300~6,500yr BP的磁山.兴隆洼.北福地一期三大文化系统并立发展时期以及6,500~6,000 yr BP的前仰韶文化时期。文化序列与气候序列对比发现:文化发展很大程度上受到气候条件的制约。从文化分布空间来看,具有如下特征:首先,早中全新世时期的文化分布在与当时海岸线平行的弧形地带上,这种分布格局与气候和地貌条件有关。在排除了地势高亢和海侵影响地区后,太行山东麓到古海岸线之间的弧形地带成为最佳选择。其次,从遗址分布高度来看,当时人仍居住在较高地貌面上,海侵及众多湖沼阻止了人类向东部平原腹地迈进的步伐。     

云南省弥渡县合家山出土铜器的技术研究

一、合家山地理位置及出土器物概况合家山地处云南西部弥渡县红岩乡东部,1995年,该地共出土铜器45件(报道了44件,实地考察45件),石、陶范23件以及陶质的残坩埚和风管,因这批材料未经科学发掘,无地层和出土物关系,故报道中根据器形、纹饰的情况将时代定为春秋晚期至战国中期,并推测这是一处青铜时代的冶铸遗址[1]。     

Ancient DNA analysis of desiccated wheat grains excavated from a Bronze Age cemetery in Xinjiang

Wheat has been one of the most important crop in Eurasia since the Neolithic period. Understanding the spread of wheat cultivation is crucial to understanding the spread of agriculture as a whole and the interactions between prehistoric populations across the Eurasian continent. However, the routes by which wheat cultivation spread eastwards have been poorly understood to date, due to the scarcity of plant remains recovered from archaeological sites. Desiccated wheat grains excavated from the Xiaohe cemetery in Xinjiang, and dated to the early Bronze Age, show excellent DNA preservation. Here we present an ancient DNA (aDNA) analysis of wheat (Triticum sp.) grains excavated from Xiaohe and provide the first definitive evidence for bread wheat in China during the Bronze Age. The nuclear ribosomal DNA internal transcribed spacer regions (ITS1 and ITS2) and the intergenic spacer region (IGS) were amplified. The IGS region within the D genome of wheat has a 71 bp insertion that is absent from corresponding regions in the A and B genomes. The results showed that the Xiaohe wheat showed most sequence similarity to hexaploid bread wheat (Triticum aestivum), including the characteristic insertion into the D genome. The presence of bread wheat at the Xiaohe cemetery is discussed in relation to it having spread into Xinjiang by the Bronze Age, providing new insight into the origins of bread wheat in East Asia.     

上海小三线与皖南地方关系研究

20世纪60年代起,上海根据中共中央、国务院加强备战、巩固国防的战略部署,先后在皖南建立了80个企事业单位,从此开始了上海小三线与皖南地方长达24年的关系。在此期间,安徽对上海的支援主要表现在土地、劳动力、建材和治安保卫等方面。上海小三线在发挥巩固国防作用的同时,对皖南地方的基础设施、工农业、文化教育以及现代文明等方面产生了深远的影响,推动了当地经济的发展,促进了当地社会的进步。同时,上海小三线人员与皖南民众之间存在着利益纠纷与矛盾,也有文化上的碰撞与冲突,但理解、接纳与融合仍是两地关系发展的主流。简言之,上海小三线与皖南各级政府、民众建立了良性的支援与协作关系。     

基于仰韶水泥的砂岩石窟裂隙灌浆材料室内筛选研究

偏高岭土是高岭土经高温脱水后形成的一种高活性的人工火山灰材料,铝酸钙膨胀剂(AEA)是以一定比例的优质高铝熟料、无水石膏等无机材料共同粉磨而成的抗裂防水膨胀剂。在研究"仰韶水泥"的过程中发现,在烧料礓石水硬石灰中添加偏高岭土后,可有效提高水硬石灰结石体的强度,缺点是收缩变形较大。本研究基于对"仰韶水泥"的研究,结合砂岩石窟及其裂隙加固的特点,通过室内研究在烧料礓石水硬石灰中添加不同比例偏高岭土和膨胀剂AEA后浆液的流动性、凝结时间、收缩率、龄期强度等基本性能,初步筛选出了适宜砂岩石窟裂隙加固的灌浆材料及配比。     

Modification of Ductility Reduction Factor for Strength Eccentric Structures Subjected to Pulse-Like Ground Motions

This article investigates the ductility reduction factors for RC eccentric frame structures subjected to pulse-like ground motions. The structural models are with the strength eccentricities which are much disadvantageous than the stiffness eccentricities during the inelastic response range. A method to determine the ductility reduction factors of the strength eccentric structures is suggested by modifying those of reference symmetric structures through an eccentricity modification factor. The four factors of strength eccentricity ratio, ductility ratio, story number and velocity pulse of ground motions, are investigated to gain insight into this modification factor. It shows that the ductility reduction factors of the eccentric structures are clearly smaller than those of the symmetric structures. The eccentricity modification factor is mainly affected by the strength eccentricity and the ductility ratio, decreasing with the increment of the eccentricity or the decrement of the ductility ratio in a medium eccentricity range. The earthquake pulse-like effect and the eccentricity have coupling influence on the modification factor, while the effect of story number is not apparent. Based on the results of a comprehensive statistical study a simplified expression is suggested, which can estimate the eccentricity modification factors for both pulse-like and nonpulse-like ground motion cases.     

三国堆塑人兽纹五管瓶

随着人们对历史文化认识的不断加深,民间收藏之风日益兴盛,民间藏品也呈精益求精之势。近些年,金华市博物在民间征集方面成绩显著,先后接受了如唐代褐釉执壶、元代的乳浊釉小香炉等一批有代表性的藏品。永康收藏家李林炎先生捐赠的三国堆塑人兽纹五管瓶就是其中之一。追朔五管瓶的历史,最早起源于东汉,历经三国、两晋时期。这一时期的五管瓶流行于东南地区,