New portraits of the Denisovans

Zhang, Dongju; Xia, Huan; Cheng, Tianyu; Chen, Fahu

doi:10.1016/j.scib.2019.10.013

Cited by 6 publications

(2 citation statements)

References 12 publications

(24 reference statements)

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“…The first human presence on the QTP has been documented using archaeological materials, with hominin handprints and footprints found at Qusang, on the high plateau, dating to around 200ka.BP , and Denisovan human bones at Xiahe, Gansu (160ka.BP) (Zhang et al, 2020). In the Late Pleistocene (40-30ka.BP), humans were present in the hinterland of the QTP, where the natural environment was very harsh (Zhang et al, 2018), and on the edge of the Qaidam Basin (Liu, 1995).…”

Section: Introductionmentioning

confidence: 99%

Simulation of exchange routes on the Qinghai-Tibetan Plateau shows succession from the neolithic to the bronze age and strong control of the physical environment and production mode

Lancuo

Hou

et al. 2023

Front. Earth Sci.

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The Qinghai-Tibetan Plateau (QTP) is essential for converging eastern, western, and northern prehistoric cultural spheres of Asia and Europe and for human adaptation to extreme environments. Reconstruction of the location and development of prehistoric exchange routes on the Qinghai-Tibetan Plateau underpins understanding human response to harsh environments and interaction and exchange between the three cultural spheres. This study simulates exchange routes for the Neolithic and Bronze Ages, using elevation, slope, vegetation, and rivers as cost data and site points as node data. A weighted network consisting of nodes and lines is constructed within the Qinghai-Tibetan Plateau using a weighted cumulative cyclic connectivity model among nodes-the simulation abstracts exchange routes as a path search problem on this weighted network. The final simulated route is the road with the lowest incremental cost. The results give a total length of Neolithic routes of about 16,900 km, with 15 main roads, and a total length of Bronze Age routes of approximately 16,300 km, with 18 main roads. Pathway development from the Neolithic to the Bronze Age shows an apparent successional relationship, with a spatial evolution from the marginal corridor to the marginal hinterland. The simulated routes overlap highly with archaeological evidence for transmission routes of corn and millet agriculture and wheat agriculture-domesticated animals-bronze metallurgy technology, indicating the reliability of the simulation results. Further analysis showed that the unique physical geography of the QTP constrained the formation and evolution of routes. River valleys were commonly chosen as routes to acclimatize people to the high, cold, and low oxygen levels of the Qinghai-Tibetan Plateau. Scattered small agricultural bases, established in areas of the QTP suitable for agricultural planting, are the basis for intersecting exchange routes. Road formation also reflects the clear differentiation in the agro-pastoral industry between high and low altitudes related to climate, ecological environment, and elevation. Interaction between agricultural and nomadic populations is the crucial motivation for forming and developing the exchange routes.

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Section: Introductionmentioning

confidence: 99%

Simulation of exchange routes on the Qinghai-Tibetan Plateau shows succession from the neolithic to the bronze age and strong control of the physical environment and production mode

Lancuo

Hou

et al. 2023

Front. Earth Sci.

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“…In addition to the experimental works, prediction on the performance of nanofluids were also performed, relating the influential factors such as concentration, type, and size of nanoparticles and temperature [14][15][16]. Based on the machine learning approaches, such as artificial neural network (ANN), least square support vector machine (LSSVM), etc., an accurate model was also developed to predict the thermophysical properties of nanofluid [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies on Thermophysical and Electrical Properties of Graphene–Transformer Oil Nanofluid

Almeida

Paul

Asirvatham

et al. 2020

Fluids

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The thermophysical and electrical properties of graphene–transformer oil nanofluid at three weight percentage concentrations (0.01%, 0.03%, and 0.05%) were experimentally studied. Experiments conducted to find viscosity, surface tension, density, specific resistance, electrical conductivity, and dielectric dissipation at various temperatures ranging from 20 °C to 90 °C. It was noted that the nanofluid with 0.05% concentration showed an enhancement of 2.5% and 16.6% for density and viscosity, respectively, when compared to transformer oil. In addition, an average reduction in surface tension is noted to be 10.1% for the maximum concentration of nanofluid. Increase in heat load and concentration improves Brownian motion and decreases the cohesive force between these particles, which results in a reduction in surface tension and increases the heat-transfer rate compared to transformer oil. In addition, for the maximum concentration of nanoparticles, the electrical conductivity of nanofluid was observed to be 3.76 times higher than that of the transformer oil at 90 °C. The addition of nanoparticles in the transformer oil decreases the specific resistance and improves the electrical conductivity thereby enhancing the breakdown voltage. Moreover, the thermophysics responsible for the improvement in thermophysical and electrical properties are discussed clearly, which will be highly useful for the design of power transmission/distribution systems.

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9.1: Invited Paper: Micro‐metallic networks (MMN) as transparent conductive electrodes: design, pilot scale, and applications

Gao

2021

Symp Digest of Tech Papers

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New portraits of the Denisovans

Cited by 6 publications

References 12 publications

Simulation of exchange routes on the Qinghai-Tibetan Plateau shows succession from the neolithic to the bronze age and strong control of the physical environment and production mode

Simulation of exchange routes on the Qinghai-Tibetan Plateau shows succession from the neolithic to the bronze age and strong control of the physical environment and production mode

Experimental Studies on Thermophysical and Electrical Properties of Graphene–Transformer Oil Nanofluid

9.1: Invited Paper: Micro‐metallic networks (MMN) as transparent conductive electrodes: design, pilot scale, and applications

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