史前漆膜的分析鉴定技术研究

研究了漆膜分析的三种主要方法：裂解质谱,红外光谱,裂解色谱。通过大量实验比较了各种方法的适应性和可靠性,建立了以裂解色谱／富里叶红外光谱联用技术来鉴定漆膜,并对影响裂解反应的因素及色借条件进行了深入的研究,获得了可以重复,具有特征性的漆膜高分辨裂解色谱图,同时对裂解色谱图中主要组分作了定性鉴定,提高了裂解色谱法分析漆膜的可靠性。该方法具有灵敏度高,样品用量小,共存杂质影响小,操作简便等优点。应用核分析技术对河姆渡,良诸庙前遗址出土的二件红色涂料样品进行了鉴定。分析结果证实了河姆渡出土的红色涂料木碗上的涂料是我国至今发现的最早的生漆漆膜。     

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.     

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.     

Fluid mixing induced by hydrothermal activity in the ordovician carbonates in Tarim Basin,China

Permian hydrothermal activity in the Tarim Basin may have been responsible for the invasion of hot brines into Ordovician carbonate reservoirs. Studies have been undertaken to explain the origin and geochemical characteristics of the diagenetic fluid present during this hydrothermal event although there is no consensus on it. We present a genetic model resulting from the study of δ¹³C, δ¹⁸O, δ³⁴S, and ⁸⁷Sr/⁸⁶Sr isotope values and fluid inclusions (FIs) from fracture‐ and vug‐filling calcite, saddle dolomite, fluorite, barite, quartz, and anhydrite from Ordovician outcrops in northwest (NW) Tarim Basin and subsurface cores in Central Tarim Basin. The presence of hydrothermal fluid was confirmed by minerals with fluid inclusion homogenization temperatures being >10°C higher than the paleo‐formation burial temperatures both in the NW Tarim and in the Central Tarim areas. The mixing of hot (>200°C), high‐salinity (>24 wt% NaCl), ⁸⁷Sr‐rich (up to 0.7104) hydrothermal fluid with cool (60–100°C), low‐salinity (0 to 3.5 wt% NaCl), also ⁸⁷Sr‐rich (up to 0.7010) meteoric water in the Ordovician unit was supported by the salinity of fluid inclusions, and δ¹³C, δ¹⁸O, and ⁸⁷Sr/⁸⁶Sr isotopic values of the diagenetic minerals. Up‐migrated hydrothermal fluids from the deeper Cambrian strata may have contributed to the hot brine with high sulfate concentrations which promoted thermochemical sulfate reduction (TSR) in the Ordovician, resulting in the formation of ¹²C‐rich (δ¹³C as low as ?13.8‰) calcite and ³⁴S‐rich (δ³⁴S values from 21.4‰ to 29.7‰) H₂S, pyrite, and elemental sulfur. Hydrothermal fluid mixing with fresh water in Ordovician strata in Tarim Basin was facilitated by deep‐seated faults and up‐reaching faults due to the pervasive Permian magmatic activity. Collectively, fluid mixing, hydrothermal dolomitization, TSR, and faulting may have locally dissolved the host carbonates and increased the reservoir porosity and permeability, which has significant implications for hydrocarbon exploration.     

近代中国的领券制度

银行业的领券制度,是近代中国货币发行史上一项独特的制度。笔者由于工作的关系,曾对领券制度产生的源流做了初步的梳理。然而,现存关于领券制度的资料比较缺乏,在这方面的研究有待深入。本文仅是提供一些基本情况,并谈点自己肤浅的看法。     

论日欧首脑外交

首脑外交是第二次世界大战以来国家间交往的一种频繁使用的外交形式,随着国际格局多极化与世界经济全球化的发展,首脑外交也日益突显出其独特作用,并且为当今大多数国家的政治首脑所接受,冷战约束后,首脑外交更加趋向于公开化,制度化,全球化,在当今国际新秩序的构建过程中,资本主义世界的铁三角同盟（日美欧战略三角）也面临着战略性的结构调整,向着全球性战略伙伴关系发展,日本与欧盟及其成员国的关键日益密切,日欧间首脑的频繁互访无疑发挥了重大的作用。     

民国西安开辟的防空便门考述

防空便门是抗日战争时期在城墙墙体上挖筑的穿越城墙的通道或豁口,是供民众躲避敌机轰炸的重要防空措施之一。防空便门的历史是西安城墙历史文化内涵的重要组成部分之一。西安城墙是中国现存历史最悠久、规模最宏大、保存最完整的古代城垣建筑,始建于隋开皇二年(582),明代洪武年间在隋唐长安城皇城的基础上进行拓建,形成了西安城墙的规模和基本形制。     

唐代墓志中新见唐人著述辑考

唐代墓志保存了大量唐人、唐代社会和唐代文化等方面的真实史料,具有极高的文献价值.近年来,随着唐代墓志的大量出土,学术界对唐代墓志的研究广泛展开,唐代墓志在文献辑佚、校勘、考定等方面正发挥着越来越重要的作用.许多学者利用唐代墓志,作了许多积极和卓有成效的研究,取得了许多令人可喜的研究成果,程章灿先生《唐代墓志中所见隋唐经籍辑考》(发表于《文献》1996年第1期)一文就是其中一项颇具价值的研究成果.     

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.     

从砍斫器到石斧：再修锐技术的演进

狩猎采集群的重要压力在于石料的采办。当石制品系统中一个部分的变化抬高采办成本并超过可接受限制时,系统中就必然出现其它方面的补偿性变化。在本文中,系统的两个最易变的部分包括：（1）被处理原料的数量;（2）由再修锐技术决定的工具使用寿命。主要由于随时间增加的切割需求,也因为木器、狩猎和筑房技术的进步,再修锐方式从硬锤打击,转向软锤打击、石片再修锐、压制法再修锐,最终转向刃缘磨光。该模式指出,