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选取土默特平原1934、1982和2019年的聚落人口数据,运用GIS空间分析法,定性与定量结合分析研究区聚落分布形态演变及其驱动因素,结果表明,1934—2019年土默特平原以小聚落为主,大规模聚落数量和比例逐年增加,人口等级结构由“扁平”向“长高”金字塔形转变。聚落空间分布整体呈现集聚分布特征,大规模聚落集聚性不显著,其他规模的聚落分布模式由随机向集聚转变,研究区人口极化现象显著;聚落空间分布非均衡发展趋势明显,呈现由极核式向点轴式演变的迹象;聚落网络联系的空间近邻效应显著,人口规模较大的中心城区成为强联系节点。地形、河流、交通是研究区聚落分布形态演变的主要驱动因素,聚落低海拔、邻河流、邻干道、邻城镇的指向性强。该研究便于厘清土默特平原近百年聚落分布形态的演变脉络,为当地聚落的空间布局优化与调控提供一定参考价值。 相似文献
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Sen You Long Wang John W. Olsen Ying Guan Quanchao Zhang 《International Journal of Osteoarchaeology》2023,33(1):94-113
China's Xinjiang Uyghur Autonomous Region has long been a vital link between Europe and Eastern Asia. Xinjiang's geographical location and natural environment have led to unique dietary habits and traditions among both the region's modern inhabitants and their ancient forebears. Here, we report on the analysis of human dental residue samples unearthed from the Jiayi Cemetery, a 10th to 2nd century BCE mortuary complex located in the Turpan Basin, Xinjiang, generating ancient starch granules produced by vegetal foodstuffs. Morphological analysis of starch granules and comparative data indicate that crops of Triticeae tribe and subfamily Panicoideae comprised a large portion of the diet, whereas common legumes, nuts, root, and tuber were also present, although in relatively smaller proportions. The discovery of these plant starch granules in archaeological context provides direct evidence of the Jiayi population's vegetal diet and sheds light on agricultural practices during this period. With supporting evidence drawn from zooarchaeological, archaeobotanical, and paleo-isotopic studies of Bronze Age sites in Xinjiang, we conclude that the people interred in the Jiayi Cemetery practiced cereal crop cultivation and animal husbandry in the Late Bronze and Early Iron Ages. The species of cereal crops represented suggest meaningful economic communication between Central and West Asia. 相似文献
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The application of heat‐treatment technology on lithic raw materials is an important feature of early modern human behaviour. The evidence of heat‐treated stone artefacts discovered at Localities 2 and 12 of the Shuidonggou Late Palaeolithic site, North‐West China, provides an important example for studying this technology among ancient humans in Asia during the Late Palaeolithic. The mechanism and effects of heat treatment on raw materials and the role of this technology in producing stone tools were studied by means of a simulation experiment and related analytical methods. These facilitated an in‐depth analysis of the heat‐treatment activities of the Shuidonggou occupants and their implications for cognitive ability and survival strategies of human populations at that time. 相似文献
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This work proposes a framework for the physics-based simulation and high-fidelity visualization of fire following earthquake (FFE) considering building seismic damage. The seismic damage of regional buildings is simulated using multiple degree-of-freedom building models in conjunction with nonlinear time-history analysis. In parallel, a high-fidelity visualization is presented to simulate fire spread and smoke effects. A case study of downtown Taiyuan with 44,152 buildings is performed. The results show that the influence of different ground motions and building seismic resistances on fire ignition and fire spread can be taken into account and that the FFE scene can be displayed realistically. 相似文献
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This research was carried out to investigate the seismic performance of RC beam-column joints under acid rain circle via comparison of energy dissipation behavior and failure mechanism of joints with different corrosion levels and axial compression ratio. At the initial corrosion level, the strength, ductility, and energy consumption of RC beam-column joints improved slightly; at a later stage, the bearing and deformation capacity decreased as the corrosion rate of steel rebars increased. The test shows that with the increasing of the axial compression ratio, the initial stiffness and ultimate bearing capacity of the joints will increasing if the corrosion levels are the same, but the ductility of that will decrease. 相似文献
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我国社会主义民族关系理论与实践考察 总被引：1，自引：0，他引：1
民族关系具有民族性,也具有社会性。社会主义民族关系集中反映了中国特色社会主义事业的社会属性。本文主要围绕社会主义民族关系的性质和内涵特征、社会主义民族关系的根本利益原则、社会主义民族关系发展的基本格局、社会主义民族关系发展的价值目标、社会主义和谐民族关系实现的形式以及党和国家实施的政策、措施进行阐述。 相似文献
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1904年科举减额缓停至1905年立停之间,科举改革的走向、方式及时间,存在诸多不确定因素,议修京师贡院为其中重要关节.在京多数部院官员主修贡院,表明缓停定议可能节外生枝,废科举的取向变数极大.张百熙、端方、袁世凯等人采取断然之策,改缓停为立停;张之洞于此虽一度犹豫,但最终附和.疆臣与枢机相互沟通联络,促成军机处和政务处的人事调整,并说服当政绕开部院会议,直接宣布立停科举.制度变革进程充满玄机,从或然到必然,相关人物的主观努力相当重要.只是精心谋略与强行干预虽可排除障碍,促成科举终结,却难以消除隐患,化解矛盾,避免急行效应带来的社会震荡. 相似文献