A new antiarch placoderm from the Emsian (Early Devonian) of Wuding,Yunnan, China

Pan, Z., Zhu, M., Zhu, Y. &; Jia, L., August 2017. A new antiarch placoderm from the Emsian (Early Devonian) of Wuding, Yunnan, China. Alcheringa 42, 10–21. ISSN 0311-5518.

Wufengshania magniforaminis, a new genus and species of the Euantiarcha (Placodermi: Antiarcha), is described from the late Emsian (Early Devonian) of Wuding, Yunnan, southwestern China. The referred specimens were three-dimensionally preserved in black shales, allowing a high-resolution computed tomography reconstruction of anatomical details. The new euantiarch is characterized by a large orbital fenestra, an arched exoskeletal band around the orbital fenestra and a developed obtected nuchal area of the skull roof. Maximum parsimony analysis, using a revised data-set of antiarchs with 44 taxa and 66 characters, resolves Wufengshania gen. nov. as a member of the Bothriolepididae, which is characterized by the presence of the infraorbital sensory canal diverging on the lateral plate, and the nuchal plate with orbital facets. New analysis supports a sister group relationship between Dianolepis and the Bothriolepididae. Luquanolepis, a coeval euantiarch from the neighboring site of the new form, is referred to the Asterolepidoidei and represents the basalmost and earliest member of the Asterolepidoidei.

Zhaohui Pan* [panzhaohui@ivpp.ac.cn], Min Zhu* [zhumin@ivpp.ac.cn], You’an Zhu^? [zhuyouan@ivpp.ac.cn] and Liantao Jia [jialiantao@ivpp.ac.cn] Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing 100044, PR China. *Also affiliated with University of Chinese Academy of Sciences, Beijing, 100049, PR China. ^?Also affiliated with Uppsala University, PO Box 256, 751 05 Uppsala, Sweden.     

时代变迁与民营书业地位之嬗变

中国当代民营书业伴随着改革的步伐逐渐发展壮大,从初创时期作为国有书业的补充,到发展时期自辟天地、寻求自主发展,再到壮大时期与国有书业平分秋色、占据我国书刊发行行业的半壁江山,它在整个中国书业中的地位也随着时代的变迁而不断发生变化。探讨不同发展阶段我国民营书业的历史作用,分析当代中国民营书业历史地位的嬗变轨迹,将有助于深化我国的文化体制改革,促进社会主义文化的繁荣与发展。     

陕西历史博物馆藏骨杂器概述

牙、骨、角、竹、漆、木器等,均属文物中的小器类,故往往被合称为杂项,但即如牙骨角漆竹木,一器之微,往往也穷工极巧,考工考史,源远流长。陕西独特的历史地位和丰富的文化遗存,使其在中国历史上占有非常突出的地位,陕西历史博物馆收藏的骨杂器即是历史的馈赠和厚爱。     

不同添加成分对书画装裱浆糊抑菌效果的评价试验

古代文献中著录的各种书画装裱浆糊添加成分中,有一部分具有防腐防霉的功效。本文利用浆糊药液琼脂培养基,对白矾、花椒、白芨、百部、丁香等添加成分进行抑菌效果评价,结果发现,白矾、百部有明显抑菌效果,花椒、丁香有一定抑菌效果,白芨抑菌效果不明显。     

Flexural Behavior of Typical Chinese Traditional Timber Stitching Beams

In Chinese traditional timber buildings, stitching is very common. When the bearing capacity or the rigidity is inadequate, a timber beam is often strengthened with another beam using the stitching method. The timber stitching beams are mainly of two types—the small-top/big-bottom type and the big-top/small-bottom type. To study the bending behavior of these two types of timber stitching beams, including the failure mode, the flexural capacity, the strain distribution at mid-span section, and the maximum deflection, bending tests are carried out on 14 timber stitching beams with Chinese traditional conformation for seven pine beams and seven fir beams. The results show that the failure modes of the small-top/big-bottom type of stitching beams all show brittle fractures at the bottoms of the bottom beams. The failure modes of the big-top/small-bottom type of stitching beams all show brittle fractures at the bottoms of the top beams. The distribution of section strain along the height of each part of the beam basically obeys plane hypothesis. Based on the theoretical and experimental analysis, the calculation formulas of flexural capacity and maximum deflection of these two types of timber stitching beams made of pine and fir are presented.     

赵心和他的收藏世界

中国企业界投资收藏极富成就者之一。2009年收藏重心转向古代宫廷书画与清代官窑瓷器、文玩杂项。尤其从海外高额竞拍入藏《石渠宝笈》著录过的宫廷书画引人瞩目。     

史学研究中利用地方志的几种方法--兼谈方志的资料性与学术性

地方志在史学研究中的价值已为人熟知,本文重点探讨史学研究中利用方志资料的几种不同取向,即作为资料直接引用、作制度分析后引用、透过背后社会权力话语后引用和透过文化规范后引用等4种利用方志的不同方式,并试图发现它与近年来学术思潮和史学研究的转向可能存在的关系,以及我们究竟能在多大程度上利用地方志资料.在此基础上,作者认为方志是一种资料性著述,并且建议第二轮新修方志应加强对首轮修志情况的记述.     

南方地区古建筑木结构的整体性残损点指标研究

古建筑木结构的残损点指标是对古建筑木结构进行结构安全评估和加固修缮设计的重要指标,目前主要依据1992年制定的《古建筑木结构维护与加固技术规范》(GB 50165—92)中的规定,为了对该规范中的构架整体性残损点指标进行验证和补充,本研究通过对南方地区传统的穿斗木构体系和抬梁木构体系的典型榫卯节点和构架的试验研究,得出两种木构体系结构的整体性关键残损点指标,并与GB 50165—92规范进行比较分析。结果表明:规范规定的抬梁式木构架和穿斗式木构架的局部倾斜残损点比试验结果小,规范值偏于安全。规范中规定的抬梁式木构架梁柱榫卯连接残损点略小于试验结果,规范值偏于安全;而规范中规定的穿斗式木构架梁柱榫卯连接残损点对于燕尾榫穿斗木构而言是安全的,但对于透榫穿斗木构而言,则是不安全的。     

神话与宗教中理想景观的文化地理透视

神话与宗教是原始的哲学和宇宙观,理想景观是其中一个重要组成部分。根据文化圈的不同,世界神话与宗教可划分为三种地域类型:中国式、希腊式和希伯莱式。它们各有其不同的理想景观类型。理想景观是人们对于环境的选择和改造,它的形成受自然环境和文化的双重作用,其中自然环境的作用是潜在的、基础性的,而文化的作用是直接的和本质性的。不同的文化通过神话和宗教中的理想景观类型来表达自己的景观理想,又依据这些理想,通过地理回归在现实中使其物化,实现对地理环境的影响。