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  • IOP Publishing  (6)
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  • IOP Publishing  (6)
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  • Unknown  (6)
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  • 1
    Online Resource
    Online Resource
    Research on Automatic Driving Simulation Test System Based on Digital Twin
    IOP Publishing ; 2022
    In:  Journal of Physics: Conference Series Vol. 2170, No. 1 ( 2022-02-01), p. 012039-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 2170, No. 1 ( 2022-02-01), p. 012039-
    Abstract: With the rapid development of 5G infrastructure, cloud computing and other technologies to enhance the rapid development of autonomous vehicles. How to quickly, safely and efficiently test and evaluate the autonomous vehicles is the only way for that to have the ability to drive on real public road. This paper build a set of automatic driving simulation test system based on digital twin technology, describing the necessary steps taken for the system design, system implementation, and testing of a autonomous vehicle. In the system the real traffic scene in the digital space re-emerged, to achieve the real vehicle running in the real environment, while mapping to the virtual environment to achieve the vehicle in the loop, making it possible to define driving test scenarios for different types of tractor and trailer combinations and providing the free test site for autonomous vehicles. At the same time, the system provides an open interface, to verify and test various autonomous algorithms. The sensor device of the tested autonomous system is flexibly configured, and the test cost is low and the efficiency is high.
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/2170/1/012039
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2166409-2
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Inverse Prediction on the Deformation of a Typical High Loess-filled Foundation during and after Construction— Taking a Key Profile as an Example
    IOP Publishing ; 2020
    In:  IOP Conference Series: Earth and Environmental Science Vol. 455, No. 1 ( 2020-02-01), p. 012065-
    Details
    In: IOP Conference Series: Earth and Environmental Science, IOP Publishing, Vol. 455, No. 1 ( 2020-02-01), p. 012065-
    Abstract: To better predict the deformation of the high loess-filled foundation, the values of the parameters of each layer in the high loess-filled foundation are obtained using changing modulus-iterative method. Based on the parameters, the deformation of the high loess-filled foundation during construction was calculated using ideal elastoplastic constitutive model and visco-elastoplastic constitutive model. Comparison between predicted and measured results indicates that the values of the parameters are suitable for predicting the deformation of the high loess-filled foundation.
    Type of Medium: Online Resource
    ISSN: 1755-1307 , 1755-1315
    URL: Article
    DOI: 10.1088/1755-1315/455/1/012065
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2434538-6
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  • 3
    Online Resource
    Online Resource
    Analysis on Bearing Capacity Factor Nc of a High Loess-Filled Foundation Using a Unified Elastoplastic Finite Difference Method
    IOP Publishing ; 2020
    In:  IOP Conference Series: Earth and Environmental Science Vol. 455, No. 1 ( 2020-02-01), p. 012077-
    Details
    In: IOP Conference Series: Earth and Environmental Science, IOP Publishing, Vol. 455, No. 1 ( 2020-02-01), p. 012077-
    Abstract: To obtain the bearing capacity factor of a high loess-filled foundation in Shaanxi Province, China, a serious of numerical calculations on a nonhomogeneous model were conducted using a unified elastoplastic finite difference method. It was found that the bearing capability factor N c increases as the friction angle ratio ξ φ and cohesive force ratio ξ c . Furthermore, the bearing capacity of loess-filled foundation can be improved by increasing the degree of density and adding cementation in construction. As an example, during the construction of the high loess-filled foundation, the bearing capacity was improved by making the degree of density come to 0.93. In addition, the width and depth of the slide surface increase as the friction angle ratio ξ φ and ξ c
    Type of Medium: Online Resource
    ISSN: 1755-1307 , 1755-1315
    URL: Article
    DOI: 10.1088/1755-1315/455/1/012077
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2434538-6
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Chiral Majorana edge modes and vortex Majorana zero modes in superconducting antiferromagnetic topological insulator
    IOP Publishing ; 2022
    In:  Journal of Physics: Condensed Matter Vol. 34, No. 11 ( 2022-03-16), p. 115503-
    Details
    In: Journal of Physics: Condensed Matter, IOP Publishing, Vol. 34, No. 11 ( 2022-03-16), p. 115503-
    Abstract: The antiferromagnetic topological insulator (AFTI) is topologically protected by the combined time-reversal and translational symmetry T c . In this paper we investigate the effects of the s -wave superconducting pairings on the multilayers of AFTI, which breaks T c symmetry and can realize quantum anomalous Hall insulator with unit Chern number. For the weakly coupled pairings, the system corresponds to the topological superconductor (TSC) with the Chern number C = ±2. We answer the following questions whether the local Chern numbers and chiral Majorana edge modes of such a TSC distribute around the surface layers. By the numerical calculations based on a theoretic model of AFTI, we find that when the local Chern numbers are always dominated by the surface layers, the wavefunctions of chiral Majorana edge modes must not localize on the surface layers and show a smooth crossover from spatially occupying all layers to only distributing near the surface layers, similar to the hinge states in a three dimensional second-order topological phases. The latter phase, denoted by the hinged TSC, can be distinguished from the former phase by the measurements of the local density of state. In addition we also study the superconducting vortex phase transition in this system and find that the exchange field in the AFTI not only enlarges the phase space of topological vortex phase but also enhances its topological stability. These conclusions will stimulate the investigations on superconducting effects of AFTI and drive the studies on chiral Majorana edge modes and vortex Majorana zero modes into a new era.
    Type of Medium: Online Resource
    ISSN: 0953-8984 , 1361-648X
    URL: Article
    DOI: 10.1088/1361-648X/ac4531
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 1472968-4
    detail.hit.zdb_id: 228975-1
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    Online Resource
  • 5
    Online Resource
    Online Resource
    Research on Self-melting Snow Material of Asphalt Pavement
    IOP Publishing ; 2022
    In:  Journal of Physics: Conference Series Vol. 2242, No. 1 ( 2022-04-01), p. 012013-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 2242, No. 1 ( 2022-04-01), p. 012013-
    Abstract: The effects of pozzolan and calcium chloride on the performance of asphalt mixtures were analyzed by laboratory performance tests. Using the maximum bulk density of mixed materials after vibration compaction, Determined the reasonable ratio of calcium chloride to fill the voids of pozzolanic material. The amount of surface modified material was determined based on the precipitation rate of the melting snow component and the effect on asphalt performance under cyclic water immersion conditions. Tested the performance of the asphalt mixture, self-melting snow material can improve the low temperature performance of the mixture. There is a certain reduction in high temperature performance and water stability, but all meet the requirements of normative indicators.
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/2242/1/012013
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2166409-2
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  • 6
    Online Resource
    Online Resource
    Influence of contact angle on droplet parameters in ellipsoidal wettability model
    IOP Publishing ; 2023
    In:  Surface Topography: Metrology and Properties Vol. 11, No. 2 ( 2023-06-01), p. 025022-
    Details
    In: Surface Topography: Metrology and Properties, IOP Publishing, Vol. 11, No. 2 ( 2023-06-01), p. 025022-
    Abstract: Contact angle is one of the most important indexes to evaluate the hydrophobicity of solid surface. In order to explore the wetting characteristics of droplets on anisotropic solid surfaces, including contact angle, droplet radius, droplet height, contact radius, contact area and projected area, an ellipsoidal droplet contact angle model was established. Different from the ordinary plane ellipsoidal cap model, the major axis and minor axis of the elliptical cap shape in this model are not exactly the same in different planes. This model studied the relationship between contact angle and interface parameters in different planes. By collecting the droplet size parameters of fluororubber (FKM) prepared by template method, the correctness of the theoretical model was verified. Among them, the maximum error between the theoretical value of droplet radius and the actual measured value was 4.3%, and the maximum error of droplet projected area was 2.1%. It was found that the contact angle was inversely proportional to the droplet-solid contact radius and contact area, and directly proportional to the projected area of the droplet. In addition, for the same droplet on the surface of the same solid material, it was observed that the contact radius between the droplet and the solid was small in the direction of large contact angle. This discovery is helpful to explain the hydrophobic mechanism of the material surface with anisotropic contact angle.
    Type of Medium: Online Resource
    ISSN: 2051-672X
    URL: Article
    DOI: 10.1088/2051-672X/acd70a
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 2739097-4
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