《登科记考》拾补

清代学者徐松之《登科记考》,汇集唐五代科举材料颇备,惟成书较早,失载及考辨未审处亦多有.自上世纪以来,后人屡撰文订正或补充徐著,其已发表之论文不下十数篇.     

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。     

陕北明长城夯土密度与雨蚀破坏的量化研究

为量化研究夯土性质对陕北明长城遗址雨蚀破坏模式的影响作用,采用室内模拟降雨试验的方法对夯土密度和雨蚀量间的关系进行定量化分析。研究结果显示,大到暴雨条件下,干湿作用产生的破坏是低强度夯土(密度1.5 g·cm^-3、1.6 g·cm^-3)最主要的雨蚀破坏模式,冲刷破坏造成的雨蚀量较小;水力侵蚀产生的冲刷破坏和重力侵蚀引起的小范围掉块是高强度夯土(密度1.7~1.9 g·cm^-3)最主要的破坏模式,冲刷破坏造成的雨蚀量较大;当土体含水率在3%~7%区间时,夯土的雨蚀量和密度呈指数函数关系,二者呈现正相关性。研究结果为探索多因素作用下夯土雨蚀的破坏机制提供方法借鉴,是土遗址病害研究的重要组成部分。     

降雨对陕西省榆林市榆阳区明长城破坏的初步分析

降雨是陕西省榆林市榆阳区明长城的主要破坏因素之一。调查中发现,降雨对遗址破坏严重。为了研究降雨对遗址的破坏,在对遗址详细调查的基础上,结合遗址特征与遗址区降雨特点,并参考土壤侵蚀学等方面理论,分析了降雨对遗址的破坏形式及影响因素。结果表明,降雨对遗址的破坏形式可分为直接破坏和间接破坏两大类。其中,主要破坏形式为冲沟侵蚀、片流面蚀和雨蚀剥离。影响因素包括降雨特点、遗址形态、土的性质、植物生长状况和地幔层等,不同破坏形式的主要影响因素各有不同。本结果不仅丰富了降雨对土遗址破坏方面的研究,还为后续陕西榆阳区明长城保护加固措施的选择提供了依据。     

青海民和县出土马家窑文化彩陶的科学分析研究

为了解青海民和回族土族自治县(以下简称民和县)阳山墓地(半山类型)和马牌墓地(马厂类型)出土的马家窑文化彩陶颜料成分及制作工艺,采用偏光显微技术、显微拉曼光谱、X射线衍射及扫描电镜-能谱对其进行综合分析。结果表明:民和县马家窑文化彩陶黑彩的呈色物相为磁铁矿和黑锰矿;红彩的呈色物相为赤铁矿;白彩的呈色物相为石英;黑彩的Fe/Mn比值,从半山时期的0.31增长到马厂时期的2.45左右,Fe/Mn比值呈现上升趋势。民和县铁矿颜料的应用是继化隆县纳卡遗址发现的又一实例,为研究矿物颜料在甘青地区史前时期彩陶中的使用历史提供重要的线索。结合地质文献资料,推测青海民和县所使用的矿物颜料为就近取材。陶胎岩相主要由石英、长石、角闪石及碳酸钙组成;以强烈铁染为特征;孔隙较多,大多拉长定向分布;在900℃左右焙烧成器。在此基础上将对甘肃和青海地区史前彩陶岩相组成进行对比研究,深入探析彩陶贸易及陶器产地信息,进而为陶器的研究与保护提供依据。     

Fluid inclusion and isotopic constraints on the origin of ore‐forming fluid of the Jinman–Liancheng vein Cu deposit in the Lanping Basin,western Yunnan,China

Extensive quartz–carbonate–Cu sulfide veins occur in clastic rocks and are spatially related to Paleocene granites in the western border of the Lanping Basin, western Yunnan, China. Abundant aqueous‐carbonic fluid inclusions occur in these veins but their origin is debated. In the Jinman–Liancheng deposit, individual primary inclusion groups contain either exclusively liquid‐rich inclusions (Gl), or coexisting liquid‐rich and vapor‐rich inclusions (Glv). Microthermometry and estimate of CO₂ content indicate that type Gl inclusions either have homogenization temperatures (Th) 238–263°C and contain c. 3.9–5.5 mole % CO₂, or have Th 178–222°C and contain c. 1.6–3.2 mole % CO₂. Type Glv inclusions are thought to represent samples of fluid unmixing that occurred at 183–218°C. At that time, the liquid phase in the unmixing fluid may contain c. 2.0–3.3 mole % CO₂. As such, the correlation of CO₂ content with Th for type Gl inclusions is thought to be caused by fluid unmixing with decreasing temperature and subsequent CO₂ escape. δ¹⁸O and δD values of the parent water mainly fall in the field below that of primary magmatic water, indicative of fluid derivation from degassed (in open system) magmatic water, with no contributions from basinal or meteoric water. Initial Sr isotopic compositions of hydrothermal carbonates suggest that the fluid was magmatic, probably derived from the Paleogene granites. δ¹³C_PDB values (?4‰ to ?7‰) of the hydrothermal carbonates and δ³⁴S_V‐CDT values of sulfides (mainly ?11‰ to +5‰) indicate that the carbon and sulfur can be derived from (degassed) magma and/or nonmagmatic sources. The CO₂‐rich and magmatic‐water‐derived fluid at Jinman–Liancheng differs from the CO₂‐poor and basinally derived fluid in sediment‐hosted stratiform Cu (SSC) deposits, which suggests that there are no genetic linkages between the vein Cu and SSC deposits in the Lanping Basin.     

近10余年周恩来与新中国外交研究述评

作为新中国第一任总理兼外交部长,周恩来直接领导新中国外交工作长达26年,他为中国与世界的和平事业作出了不可磨灭的杰出贡献。本文就自1997年以来周恩来与新中国外交这一研究领域的国内外主要研究成果和现存问题做一简要评述。一、近10余年出版的相关图书概况自20世纪90年代中后期至今,国内外先后出版了一批关于周恩来与新中国外交的图书,这些图书大致可以分为三类:     

珠江三角洲乡镇工业空间分布的分散性研究——以顺德市北滘镇为例

乡镇工业空间分布的研究具有很强的理论与现实意义。国外就这一主题的研究很少。本文在总结国内目前有关研究的基础上,以我国乡镇工业发达的珠江三角洲为研究区域,以顺德市北滘镇为实例,采用北滘镇域内109间乡镇工业企业的抽样问卷调查资料,对乡镇工业分散分布问题进行实证研究,试图从企业角度揭示和分析乡镇工业分散分布的根本原因。     

Labour in Global Value Chains: Work Conditions in Football Manufacturing in China,India and Pakistan

A critical challenge facing developing country producers is to meet international labour standards and codes of conduct in order to engage in global value chains. Evidence of gains for workers from compliance with such standards and codes remains limited and patchy. This article focuses on the global football industry, a sector dominated by leading global brands that manage dispersed global value chains. It assesses the working conditions for football stitchers engaged in different forms of work organization, factories, stitching centres and home‐based settings in Pakistan, India and China. It draws on detailed qualitative primary field research with football‐stitching workers and producers in these three countries. The article explains how and why work conditions of football stitchers differ across these locations through an analytical framework that interweaves both global and local production contexts that influence work conditions. In doing so, it argues that current debates on the role of labour in global value chains have to go beyond a narrow focus on labour standards and corporate social responsibility compliance and engage with economic, technological and social upgrading as factors that could generate sustained improvements in real wages and workers’ conditions.     

A new species of the aphid family Burmitaphididae (Hemiptera: Sternorrhyncha: Aphidomorpha) from Upper Cretaceous Burmese amber

Liu, X., Qiao, G.X., Yao, Y. & Ren, D., 28 March 2019. A new species of the aphid family Burmitaphididae (Hemiptera: Sternorrhyncha: Aphidomorpha) from Upper Cretaceous Burmese amber. Alcheringa 43, 455–460. ISSN 0311-5518

A new species of extinct aphids is reported based on a fossil specimen with a relatively complete body and broken wings from Upper Cretaceous Burmese amber. Vasteantenatus reliquialaus sp. nov. (Hemiptera: Aphidomorpha: Burmitaphididae) differs from other burmitaphidids in having antennae distinctly longer than the body. The diagnosis of Burmitaphididae is emended, and a key to all species of the family is provided

Xue Liu [katharina0521@foxmail.com], Key Lab of Insect Evolution and Environmental Change, College of Life Sciences, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing, 100048, China; Gexia Qiao [qiaogx@ioz.ac.cn], Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, No. 1 Beichen West Road, Chaoyang District, Beijing, 100101, China; Yunzhi Yao* [yaoyz100@126.com], Key Lab of Insect Evolution and Environmental Change, College of Life Sciences, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100048, China; Dong Ren [rendong@mail.cnu.edu.cn], Key Lab of Insect Evolution and Environmental Change, College of Life Sciences, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100048, China.