对外文化传播与我国文化软实力的构建

文化的传播能力是衡量国家文化软实力的重要因素。不断提升对外文化传播能力有利于塑造良好的国家形象,营造中国和平发展的国际舆论环境;有利于拓展中华文化的国际影响,保证国家文化安全;有利于推动中国文化参与国际竞争,改变中国文化贸易严重逆差的不利格局。对外文化传播必须坚持正确的导向;加快构建传输快捷、覆盖广泛的传播体系;必须积极开展文化外交和对外文化贸易,增强国家文化影响力和竞争力。     

太原晋卿赵鞅墓车马坑马骨的保护与修复

春秋晚期的晋卿赵鞅墓车马坑马骨历经2500年的埋藏,有一定程度的腐朽;易地保护的切割,造成严重损伤;多次搬迁,造成箱内切块严重开裂破碎;出土后的长期裸露存放,形成一定程度的表面风化.为解决马骨的破损与风化,以及马骨承托底土的整体性问题,本工作采取的研究与保护措施有:对马骨骨组织结构进行电镜观察和力学性能检测、置换和轻化承托底土、隔绝地面水气、修补切割缝、修复屿骨、作防风化处理.经过两年的艰苦工作,晋卿赵鞅墓车马坑马骨的科技保护与修复完成了既定目标,达到了预期效果.     

Viking woollen square-sails and fabric cover factor

The discovery of the five scuttled Viking ships of Roskilde Fjord in Denmark and the subsequent excavation, preservation and analysis of the remains has initiated a programme of reconstructive archaeology led by the Viking Ship Museum of Roskilde in which four of the five hulls have now been reconstructed together with their rigs and square-sails. The reconstruction of the sails has been based on fragments of heavy woollen cloth found within the roof of Trondenes church in Norway dating to the mid-13th century. This paper uses the'cover-factor' modelling methods of modern textile engineering to analyse the'Viking' sail fabrics and assess their strength, resilience and performance in comparison with the linen sails from the wreck of the Vasa .     

秦俑保护修复中陶体抗压抗折性能试验研究

在秦俑的保护修复中,对秦俑不同部位的陶体进行了抗压强度、抗折强度及粘接抗折强度的试验研究。选取有代表性的小残片作为样本,采用高压水射流方法加工小尺寸试件,分别进行了24组抗压强度、24组抗折强度和12组粘接抗折强度试验。结果表明:秦俑陶体整体平均抗压强度为29.65 MPa、抗折强度为12.65 MPa,不同部位的抗压强度差异相对较大、抗折强度差异相对较小;甲片部位的抗压强度和抗折强度均较高,而其他部位的抗压强度和抗折强度的相对大小有所差异;对于粘接修复后的陶体,抗折强度相比粘接前有所降低;腿部的各项力学性能都相对较低且位于秦俑受力的关键部位,因而有必要进行重点保护。     

古建筑烧结粘土砖性能检测的超声波方法研究

烧结粘土砖作为中国古建筑使用最广泛的材料之一,现有的机械物理性能检测方法多为破坏性的,采用超声波无损检测法则可以最大程度保证砖的完整性。因此,本工作对比了试验台、砖表面平整度以及砖湿度等客观条件对超声波无损检测方法的影响,确定了超声波法检测古代粘土砖性能的操作流程。在初步测定采自山西南部及香港某古建筑的砖性能后发现,超声波无损技术可以标定砖的机械物理性能,并能判断同类型砖的不同劣化程度。超声波无损检测过程可以很好地保证古代砖的完整性,不会对古建筑造成破坏,而且具有便携性。研究结果表明,超声波无损检测是可以推广应用的古建筑勘察及质量监测技术。     

Early Concrete Structures: Patented Systems and Construction Features

ABSTRACT

Reinforced concrete structures came to Spain in the late-19th century, somewhat after the development of this new construction material elsewhere in Europe. Their introduction was pioneered in industrialized areas, especially Northern Spain, under systems first patented in other European countries. Local constructors built structures under patents with little or no explanations to account for calculation, design, and construction technique. Some of these buildings from the recent past are now listed buildings. This study centres on three construction projects under patented systems: Our Lady of “La Antigua”, Orduña (Monier system), “La Ceres” flour mill, Bilbao (Hennebique system), and Alhóndiga, Bilbao (Blanc system). Preliminary structural studies analyzed morphology, reinforcements, concrete strength and pathological processes in each structure. Their results are compared with information taken from the patent systems in use at the time. This useful information on the structures, which may be expanded in future research, clearly describes the relationship between patent specifications and reality.     

古建筑木构件的防火处理与性能研究

古建筑具有重要的文化价值和经济价值,是重要的不可再生文化遗产。中国的古建筑以木为主要结构,而木结构的耐火等级低,这就造成了中国古建筑面临了一个极大的隐患——火灾,因此对古建筑木构件的防火处理与性能的研究迫在眉睫。为此,试验选取3种不同的木材和5种不同的阻燃剂作为研究对象,首先对涂覆不同阻燃剂的木材进行表观特征测量,然后分别采用热重分析法和扫描电子显微镜测试技术进行表征测试,最后分析阻燃木材的各种力学性能测试。研究结果表明:喷涂阻燃剂的木材其性能效果均优于未喷涂的木材。特别针对未涂油漆的原木构件,可以采用有机磷杂环阻燃剂或磷—氮类阻燃剂;普通油漆的木构件则适用于磷—氮类阻燃剂,而处理桐油木构件应用磷—氮类阻燃剂或阻燃油。     

Brachiopods of the Yarralumla Formation (Ludlovian), Canberra,Australia

The Yarralumla Formation of Canberra has been considered the stratigraphic equivalent of the earliest Ludlovian Yass Formation of the Yass Syncline north of Canberra. The previously unpublished brachiopod fauna of the Yarralumla Formation is fully described; comparison with that of the Yass Formation confirms approximate age equivalence. Of the eleven species, none of which is new, eight also occur in or a little above the Yass Formation.     

A FIBRE FINITE BEAM ELEMENT WITH SECTION SHEAR MODELLING FOR SEISMIC ANALYSIS OF RC STRUCTURES

The paper describes the formulation of a non-linear, two-dimensional beam finite element with bending, shear and axial force interaction for the static and dynamic analysis of reinforced concrete structures. The hysteretic behaviour of “squat” reinforced concrete members, in which the interaction between shear and flexural deformation and capacity is relevant for the overall structural performance, is emphasised. The element is of the distributed inelasticity type; section axial-flexural and shear behaviours are integrated numerically along the element length using a new equilibrium-based approach. At section level a “hybrid” formulation is proposed: the axial-flexural behaviour is obtained using the classic fibre discretisation and the plane sections remaining plane hypothesis, the shear response instead is identified with a non-linear truss model and described with a hysteretic stress-strain relationship. The latter contains a damage parameter, dependent on flexural ductility, that provides interaction between the two deformation mechanisms. The element has been implemented into a general-purpose finite element code, and is particularly suitable for seismic time history analyses of frame structures. Analytical results obtained with the model are compared with recent experimental data.     

"世界军事大国"的日本模式

经过半个多世纪的潜心发展,日本已成为名副其实的“世界军事大国”。日本积极扩充军事实力,努力发展核武技术,不断强化日美军事同盟关系,在“半遮半掩”中,已在“世界军事大国”的危险道路上越滑越远。这不能不引起亚洲邻国和国际社会的高度警惕。