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Study on Radial and Longitudinal Zoning of Insulation Layer in Alpine Tunnel under Wind Field
Sustainability, 2023 The unreasonable setting of thermal insulation layer in high cold tunnels not only increases the maintenance cost of tunnels, but also weakens the anti-freezing and cold resistance of the tunnels. In order to optimize the setting of thermal insulation layer in an Alpine tunnel, relying on Dabanshan tunnel in Qinghai Province, three schemes of radial ...
Jinpeng Zhao
exaly +2 more sources
Tunnel portal lining behavior in freeze–thaw conditions and innovative anti–freezing insulation structures [PDF]
Scientific ReportsFreezing can greatly impact the capacity of tunnel linings in soil, making it essential to investigate the changes in stress state caused by frost heave.
Yifan Zhang +6 more
doaj +2 more sources
Development of a multi-channel classifier of rail line states [PDF]
E3S Web of Conferences, 2023 The article deals with the construction of a three-channel invariant classifier that has the properties of classifying the states of rail lines into a set of classes that are invariant to changes in the longitudinal resistance of the rail line and the ...
Tarasov Evgeny +4 more
doaj +1 more source
Archives of Acoustics, 2023 Sound insulation of the finite double-panel structure (DPS) inserted with a cylindrical shell array is investigated by varying the sound incidence direction to improve its applicability.
Myong-Jin KIM, Song-Hun KIM
doaj +1 more source
Energies, 2022 Numerical simulation of polypropylene laminated paper insulation is a serious challenge, as it must take into account the layered structure and presence of longitudinal and radial gaps in the coils of the winded tape for cables with sector-shape ...
Dmitry Arsenyev +3 more
doaj +1 more source
The influence of polyisocyanurate (PIR) facing on the heat transfer through the corners of insulated building partitions [PDF]
E3S Web of Conferences, 2020 Prefabricated products made of polyisocyanurate (PIR) thermal insulation material covered with cardboard, plastic, aluminium or composite facings are used for thermal insulation of building envelopes. The facing of these products is selected according to
Makaveckas Tomas, Bliūdžius Raimondas
doaj +1 more source
Flexural–Shear Performance of Lightweight Concrete Panels with High Insulation Capacity
Buildings, 2022 With the increased interest in the inherent fire resistance of organic insulators, various precast concrete insulation panels have been developed. However, precast concrete insulation panels still have structural and fire resistance problems resulting ...
Keun-Hyeok Yang +3 more
doaj +1 more source
Low-frequency waterborne sound insulation by an acoustic metascreen with a metal chiral structure
Frontiers in Materials, 2022 Low sound speed or low-density materials can be used as soft acoustic boundaries in water, potentially as low-frequency underwater sound insulation. This study uses a chiral structure to construct an acoustic metascreen with deep subwavelength thickness.
Chao Wang +13 more
doaj +1 more source
Influence of longitudinal mode components on second harmonic generation in III-V-on-insulator nanowires [PDF]
Optics Express, 2020 The large index contrast and the subwalength tranverse dimensions of nanowires induce strong longitudinal electric field components. We show that these components play an important role for second harmonic generation in III-V wire waveguides. To illustrate this behavior, an efficiency map of nonlinear conversion is determined based on full-vectorial ...
Ciret, Charles +7 more
openaire +3 more sources
Trends in Improving Sensors for Controlling the Condition of Track Sections [PDF]
E3S Web of Conferences, 2021 Various principles can be used to implement intelligent track circuits: voltage regulation of the power supply, compensation methods for switching on rail lines and track circuit devices, receiver sensitivity adjustment, comparison of two electrical ...
Aliev Ravshan
doaj +1 more source