基于腾讯迁徙数据的中国“春运”城市间人口流动空间格局

“腾讯迁徙”大数据基于位置服务，实时、动态、完整、系统地描述了用户日常出行活动的轨迹。通过采集“腾讯迁徙”数据平台中2018年春运期间中国346个地级及以上城市之间的逐日人口流动数据，分“节前、节中、节后”3个时间段，利用复杂网络分析方法，从人口流动的集散层级、集散体系分层集聚特征、人口流动空间格局、网络空间特征等角度分析各时间段城市间的人口流动特征与空间格局。结果表明，腾讯迁徙大数据直观地揭示了春运期间中国城市间人口流动空间格局，3个时段人口的净流入均呈现十字形骨架支撑的菱形分布，人流集散中心主要集中在京津冀、长三角、珠三角和成渝4大城市群，与城市等级有较强的一致性。人口流动集散体系呈明显的分层集聚，城市行政级别的高低与人口流动影响力存在一定的正相关关系，大部分城市人口流动处于“相对平衡”状态。人口流动网络呈现东密西疏的分布特征和东部并联、西部串联的网络关联特征。人口流动网络局部具有较明显的“社区”结构特征，聚为3个大区级、5个跨区域级和1个地区级社区。     

Fragments from many pasts: layering the toponymic tapestry of Milan

In the recent literature on the cultural politics of naming, toponyms and street names are increasingly read within the wider social–historical context upon which naming is contingent. In this perspective, naming is often seen as an act of power and a way to inscribe an ideological discourse into the landscape. In this article, we analyze the street names currently inscribed in the historical center of the Italian city of Milan, Italy as a reflection of its long and contested social and political history. Fragments of all the different toponymic regimes and hegemonic discourses that took over one after the other over time have remained inscribed in Milan’s street network, originating a complex tapestry in which different pasts revive and conflicting ideologies co-exist. In this context, we examine the role Geographical Information Science (GIScience) methods and technologies play in quantifying, revealing, and visualizing the spatial patterns of downtown Milan’s toponymic texture at the urban scale and at the scale of the six historical neighborhoods.     

Computer programmes for the correction of matrix effects in the XRF analysis of glass,ceramics and related silicate systems

The quantitative analysis of glass, ceramics and related silicate systems by means of energy dispersive X-ray fluorescence spectrometry is considered and problems arising from the selective absorption of X-rays in multi-element specimens are discussed. A computer programme written in FORTRAN and based upon a “semi-fundamental parameters” approach to the correction of matrix effects in glass and chemically similar materials is fully described. Model data are provided to enable the programme to be run and tested. An “empirical coefficients” computer programme for the quantitative analysis of silicate systems is outlined and the limitations of this type of programme are pointed out. The importance of adequate sample preparation prior to X-ray spectrometric analysis is stressed.     

青花瓷器产地判别研究

本项研究以江西省景德镇、云南省玉溪、建水、福建省平和的青花瓷器为主,结合香港清代碗窑以及德国、日本、泰国的现代青花瓷器,用能量色散X射线荧光（EDXRF）分析方法,在无损的情况下对其元素含量进行分析,得到了Ti、Mn、Fe、Co、Ni、Cu、Zn、Ga、Pb、Rb、Sr、Y、Zr13个元素的含量结果。用主成分分析方法对数据进行处理,利用第1主成分、第2主成分、第3主成分在三维座标系中绘制散点图,所得类群关系与已知情况完全相符。研究结果表明本文的研究方法可用于青花瓷器的产地判别。     

Investigating Identity and Life Histories: Isotopic Analysis and Historical Documentation of Slave Skeletons Found on the Cape Town Foreshore, South Africa

Isotopic analysis of skeletons excavated during the 1950s has confirmed that they are the remains of shipwreck victims: slaves on board the Portuguese slaving brig Pacquet Real when it sank on 18 May 1818. Twenty-five slaves drowned and the remaining 133 became Prize Negroes at the Cape. The isotopic signatures are consistent with values expected for people living in an African village eating a terrestrially based diet. Analyses of different skeletal elements, i.e., teeth, long bone, and rib, are shown to be a valuable tool in tracing change or consistency in diet during a person's life, because different skeletal elements form at different stages of life and, subsequently, remodel at different rates. A comparison of isotope ratios from different skeletal elements indicates a change in diet in all these individuals, probably coincident with their enslavement. Variation between individuals in the isotopic composition of diets eaten early in life is sufficiently large to deduce heterogeneous origins for the group.     

Health centre visits among the elderly with chronic ailments: Evidence from the Kanchanaburi Demographic Surveillance System, 2004, Thailand

This study deployed statistical and spatial (GIS) analyses to test the effects of geographic, demographic and occupational factors in predicting health centre visits among the elderly (≥60 years) with chronic ailments in Kanchanaburi Province, western Thailand. Datasets from the Kanchanaburi Demographic Surveillance System (2004 baseline survey and a 2006 project follow-up) comprised five land-use landscape and occupational strata: urban/semi-urban (industrial), rice field, plantation crop, upland and mixed economy. Travel distance to the nearest health centre was calculated following transportation routes and the GPS coordinates of individual home locations, and the number of healthcare visits under the national free universal coverage (UC) scheme reported for the previous year was used as a dependent variable in regressions. Broadly, the study found that distance was not a significant predictor of the rate of elderly health centres visits for those with co-residing spouses and/or adult children (77% of sample), and for the elderly still working (48% of the sample) who were the least likely to access healthcare. Owning motorised vehicles did not encourage visits, which also varied by land-use and occupational strata.     

转型期中国城市网络空间结构演变——基于商业银行分支机构网络的视角

21世纪以来,城市网络研究成为全球和区域城市体系研究关注的焦点,但当前对国家层面城市网络空间结构演变的研究还较少涉及。基于2001—2016年间中国商业银行网点空间分布变化数据,运用社会网络分析方法,对中国城市网络空间结构的时空演变特征进行了研究。研究结果显示：中国城市网络结构由等级化向网络化转变,具体表现为在轴辐结构基础上向连通性更强的链锁网络演进;与此同时,城市网络同时呈现少数城市网络连接度的极化以及多中心扩散的特征。区域层面,东部沿海地区,特别是长三角、京津冀和珠三角三大区域的城市网络发展较为完善,与其它区域的差距持续拉大,但山东、东北和福建等省份与区域内外的联系增长也较快。大多数城市的出度和入度差异明显,但这一差异正在逐渐缩小。     

荥阳官庄遗址制陶作坊出土陶泥陶坯的科学分析

河南省荥阳官庄遗址发现了用于制陶的粘土原料以及未烧制的陶坯,这为研究西周中期以后中原制陶技术提供了不可多得的研究资料。为此,本研究利用能量色散X射线荧光光谱仪、X射线衍射分析仪分析了部分原料和陶坯,并使用马弗炉对其中的陶泥进行了烧制实验。结果发现,官庄遗址的制陶原料含铁量较高,烧制过程中析出磁铁矿等铁类矿物,且烧成陶色偏深;此外,制陶原料和同期陶片之间物相的趋同性和化学成分的聚类性,显示陶器本地生产的特性。研究结果为研究西周晚期至春秋早期时期制陶技术提供了基础材料。     

青海瞿昙寺壁画颜料的研究

通过对青海瞿昙寺画郎和建筑彩绘所用的22个绘画颜料样品的 x-射线衍射和同位素 x 荧光分析.共分析出20多种无机矿物颜料,此外.还有蓝钯、黄钯有机颜料。本文对这些颜料的分析结果进行丁综合论述.并与敦煌石窟、麦积山石窟、炳灵寺石窟等的彩绘颜料进行了研究。