AN ARTISTIC LIFE CREATED BY A PAIR OF SKILLFUL HANDS

正The cold season isjust about to arrive in Lhasa.A tallllbetan man is standing upon the golden roof of the Jokhang Temple to look out into distance.His name is Tsegya,a man with a deep affection for this very roof.This is the place where his karma connects him to his produced mandalas.Tsegya told me that     

基于快递物流测度的区域流动空间特征——以江苏省为例

在信息技术推动下,流动空间作为新时期的新空间形式在带来时空压缩效应的同时不断地强化着区域城市间联系,推动着社会经济资源的城际流通。快递物流是互联网交易的虚拟流与快速交通实体流交互产生的物质流动,其代表了流动空间的虚实二元性,是研究流动空间网络特征的有效切入点。以江苏十三个城市为研究区域,以六家物流公司的网站数据为数据来源,采用权重分析法和重力模型方法建立起区域城市的快递物流水平、城市间流动空间连接度及城市快递物流总体评价等三项指标,结合区域流动空间的指标分析发现区域流动空间具有网络一体化、去中心化、扁平化、等级化及点轴式等五大特征,基于流动空间的可视化研究发现江苏省区域城市间关系显示出了一个具有等级特征的多中心扁平化点轴网络,围绕南京、苏州、徐州的都市圈一体化发展态势成为提高区域流动空间流动能力的重要突破方向。     

Multiphase flow simulation through porous media with explicitly resolved fractures

Accurate simulation of multiphase flow in fractured porous media remains a challenge. An important problem is the representation of the discontinuous or near discontinuous behaviour of saturation in real geological formations. In the classical continuum approach, a refined mesh is required at the interface between fracture and porous media to capture the steep gradients in saturation and saturation‐dependent transport properties. This dramatically increases the computational load when large numbers of fractures are present in the numerical model. A discontinuous finite element method is reported here to model flow in fractured porous media. The governing multiphase porous media flow equations are solved in the adaptive mesh computational fluid dynamics code IC‐FERST on unstructured meshes. The method is based on a mixed control volume – discontinuous finite element formulation. This is combined with the P_N+1DG‐P_NDG element pair, which has discontinuous (order N+1) representation for velocity and discontinuous (order N) representation for pressure. A number of test cases are used to evaluate the method's ability to model fracture flow. The first is used to verify the performance of the element pair on structured and unstructured meshes of different resolution. Multiphase flow is then modelled in a range of idealised and simple fracture patterns. Solutions with sharp saturation fronts and computational economy in terms of mesh size are illustrated.     

Chemical and Microscopic Study of Masonry Mortar in Ancient Pagodas in East China

Ancient mortars played a crucial role in the construction of historical architectures due to their physical and chemical compatibility with traditional building materials such as stones and bricks. Therefore, the analysis and optimization of the ancient mortar formula are significant in the restoration and preservation of historical sites. In this work, 20 mortar samples selected from five ancient stone pagodas in Zhejiang Province, China, were analyzed. The results showed that mud, lime-soil mortar, lime-sand mortar, and lime-gypsum mortar were used as binders in these pagodas. The Ca(OH)₂/aggregate ratio ranging from 0.3 to 2.7 was usually used to prepare lime mortar. Protein and polysaccharide were also found in some samples.     

“罗马和平”时期石碑的保护修复

罗马帝国初期的200年(公元前27年~公元2世纪)是罗马的鼎盛时期,开创了经济、文化、军事、艺术前所未有的高峰,被称为"罗马和平"时期。本文保护修复的几件"罗马和平"时期的石碑原本收藏在意大利罗维纳市的Lapidario博物馆,后委托意大利博洛尼亚KRITERION文物修复公司进行保护修复,进行了清洗、补全、封护等保护修复工作。     

明代云南书院考析——以明清云南方志为中心

文章认为,明代云南书院建设应始于明代弘治年间,最早应兴起于以大理为中心的滇西一带;就其所建书院数量而言,整个明代云南各地所建书院大致可确定为78所。明代云南书院建设与当时全国各地书院建设大致同步,书院建设地域集中,书院一般由各地方官员动议而建,明代云南书院建设与王学入滇也有一定关系。     

关于利用历史文献信息进行环境演变研究的几点看法

针对如何更好地利用我国丰富的历史文献记录,开展历史时期环境演变研究,本文提出四点看法:从地球系统科学与全球变化研究的前沿中寻找研究的主题,在诸多不确定中寻找确定性答案,构建历史文献信息共享的环境演变研究平台,培养文理兼备的复合型人才。     

全球化语境下的民族节日走向——以当代中国节日为例

21世纪是全球化加速的时代,信息技术与快速的交通方式将广袤的世界变成了一个共处的地球村落。原本天地悬隔、各自分离、独立自足的族群在世界经济一体化的过程中迅速成为声息相通的"邻里街坊"。原本各自独立成长过程中形成的历史文化经验,使族群拥有各自的文化传统,这些有着独立文化传统的族群在全球化过程中猝然相遇,彼此之间的冲突与不适不可避免,因此互相的磨合、适应需要一个较长的时间过程。     

试论唐朝的“中国”与“天下”

唐代“中国”一词大体用于追述前代和议论当朝。唐代“中国”有地域、文化、民族及政权的含义,可以用来指代朝廷直接统治区域、中原为核心的地区或内地,是“天下”的核心或重要组成部分。唐朝“天下”一词有广义、狭义之分。狭义的“天下”指唐朝实际统治的范围即唐朝统一多民族的国家,这是唐朝“天下”的主要含义。此“天下”与“军国”、“邦国”基本同义,但各有侧重。“军国”最郑重,一般用于中央最高决策机构首脑的职掌范围;“邦国”更普通,主要用于官府和中央事务的层面;“天下”更广泛,一般用于中央和地方、官吏和百姓两方面事务的层面。广义的“天下”则指以“中国”为核心,以唐朝统一多民族国家(狭义“天下”)为政治实体,包容其他国家的世界体系和政治秩序。     

论湖南抗战文化的历史地位和作用

湖南不仅是九一八事变后全国抗战文化运动兴起最早,声威最壮,影响最大的省份之一;而且是七七事变后一年半内,全国抗战文化的传播、辐射中心,丰富、发展、壮大了全国抗战文化运动的声威和内涵,对推动全国抗战文化深入发展有深远影响。