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  • IOP Publishing  (15)
  • Liu, Zhen  (15)
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  • IOP Publishing  (15)
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  • 1
    Online Resource
    Online Resource
    JUNO sensitivity to 7 Be, pep, and CNO solar neutrinos
    IOP Publishing ; 2023
    In:  Journal of Cosmology and Astroparticle Physics Vol. 2023, No. 10 ( 2023-10-01), p. 022-
    Details
    In: Journal of Cosmology and Astroparticle Physics, IOP Publishing, Vol. 2023, No. 10 ( 2023-10-01), p. 022-
    Abstract: The Jiangmen Underground Neutrino Observatory (JUNO), the first multi-kton liquid scintillator detector, which is under construction in China, will have a unique potential to perform a real-time measurement of solar neutrinos well below the few MeV threshold typical of Water Cherenkov detectors. JUNO's large target mass and excellent energy resolution are prerequisites for reaching unprecedented levels of precision. In this paper, we provide estimation of the JUNO sensitivity to 7 Be, pep , and CNO solar neutrinos that can be obtained via a spectral analysis above the 0.45 MeV threshold. This study is performed assuming different scenarios of the liquid scintillator radiopurity, ranging from the most optimistic one corresponding to the radiopurity levels obtained by the Borexino experiment, up to the minimum requirements needed to perform the neutrino mass ordering determination with reactor antineutrinos — the main goal of JUNO. Our study shows that in most scenarios, JUNO will be able to improve the current best measurements on 7 Be, pep , and CNO solar neutrino fluxes. We also perform a study on the JUNO capability to detect periodical time variations in the solar neutrino flux, such as the day-night modulation induced by neutrino flavor regeneration in Earth, and the modulations induced by temperature changes driven by helioseismic waves.
    Type of Medium: Online Resource
    ISSN: 1475-7516
    URL: Article
    DOI: 10.1088/1475-7516/2023/10/022
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 2104147-7
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  • 2
    Online Resource
    Online Resource
    Precision Higgs physics at the CEPC *
    IOP Publishing ; 2019
    In:  Chinese Physics C Vol. 43, No. 4 ( 2019-04-01), p. 043002-
    Details
    In: Chinese Physics C, IOP Publishing, Vol. 43, No. 4 ( 2019-04-01), p. 043002-
    Type of Medium: Online Resource
    ISSN: 1674-1137 , 2058-6132
    URL: Article
    DOI: 10.1088/1674-1137/43/4/043002
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 2491278-5
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  • 3
    Online Resource
    Online Resource
    Study on flow field characteristics of undulating member bar in engineering
    IOP Publishing ; 2021
    In:  IOP Conference Series: Earth and Environmental Science Vol. 791, No. 1 ( 2021-06-01), p. 012074-
    Details
    In: IOP Conference Series: Earth and Environmental Science, IOP Publishing, Vol. 791, No. 1 ( 2021-06-01), p. 012074-
    Abstract: Aiming at the undulating member bar, three kinds of wavelength models are established. The flow characteristics of the undulating member bar with space angle of attack are analyzed by the large eddy simulation method under high Reynolds number, its velocity and pressure distribution with different wavelengths are studied, and the time and frequency domain characteristics of circumferential pressure coefficient, resistance and lift are discussed. The results suggest that the greater the fluctuation of the outer surface of the wave member, the greater the time difference between the maximum and minimum cross-sections; the greater the surface inclination, the greater the change in surface pressure. While the smaller the wavelength, the larger the amplitude of the rod resistance coefficient and the range of the main peak; the larger the wavelength, the slower the attenuation rate of the amplitude peak of the rod resistance and lift coefficient. Combined with the characteristics of the flow field, when the incoming flow has a space angle of attack, the wave cylinder of can achieve a better effect of drag reduction and vibration reduction. Finally, the research results provide important significance and value for the research and application of the flow characteristics of undulating member bar.
    Type of Medium: Online Resource
    ISSN: 1755-1307 , 1755-1315
    URL: Article
    DOI: 10.1088/1755-1315/791/1/012074
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2434538-6
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  • 4
    Online Resource
    Online Resource
    Polyvinyl alcohol templated synthese of hierarchical SAPO-11
    IOP Publishing ; 2020
    In:  Materials Research Express Vol. 7, No. 8 ( 2020-08-01), p. 085009-
    Details
    In: Materials Research Express, IOP Publishing, Vol. 7, No. 8 ( 2020-08-01), p. 085009-
    Abstract: This work reports that the polyvinyl alcohol successfully templates the intracrystal mesoporous structure of hierarchical SAPO-11 molecular sieves. The structures of prepared hierarchical SAPO-11 materials and a conventional SAPO-11 simultaneously synthesized are characterized by X-ray diffraction, N 2 adsorption/desorption, scanning electron microscopy and high resolution transmission electron microscopy. The characterizations demonstrate that this synthesized hierarchical SAPO-11 possesses a mesopore structure with a much regular pore size distribution. Importantly, these mesopores are intracrystal but not intercrystal. The bifuntional isomerization catalyst with this hierarchical SAPO-11 as support shows a high selectivity in hydroisomerization reaction of hexane, evidencing that the catalytic selectivity is improved by introduction of mesopore structure into the SAPO-11 crystal. The templating mechanism of polyvinyl alcohol in formation of mesopores is well discussed at the ending. This work provides a potential template to prepare hierarchical catalyst materials.
    Type of Medium: Online Resource
    ISSN: 2053-1591
    URL: Article
    DOI: 10.1088/2053-1591/abac3d
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2760382-9
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  • 5
    Online Resource
    Online Resource
    Ultralight dark matter detection with mechanical quantum sensors
    IOP Publishing ; 2021
    In:  New Journal of Physics Vol. 23, No. 2 ( 2021-02-01), p. 023041-
    Details
    In: New Journal of Physics, IOP Publishing, Vol. 23, No. 2 ( 2021-02-01), p. 023041-
    Abstract: We consider the use of quantum-limited mechanical force sensors to detect ultralight (sub-meV) dark matter (DM) candidates which are weakly coupled to the standard model. We show that mechanical sensors with masses around or below the milligram scale, operating around the standard quantum limit, would enable novel searches for DM with natural frequencies around the kHz scale. This would complement existing strategies based on torsion balances, atom interferometers, and atomic clock systems.
    Type of Medium: Online Resource
    ISSN: 1367-2630
    URL: Article
    DOI: 10.1088/1367-2630/abd9e7
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 1464444-7
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  • 6
    Online Resource
    Online Resource
    Simulation and Analysis of Radial Temperature for Aluminum Conductor Steel Reinforced with 1250mm 2 Large Cross-Section
    IOP Publishing ; 2021
    In:  Journal of Physics: Conference Series Vol. 1802, No. 4 ( 2021-03-01), p. 042097-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 1802, No. 4 ( 2021-03-01), p. 042097-
    Abstract: In order to meet the growing demand for electricity, the construction of UHVDC project has vigorously carried out. With the improvement of voltage level, the cross-section of conductor also increases. For large cross-section conductor, the number of steel and aluminum single wires and layers of the conductor are large, and the internal structure is very complex. It has been proved that there is a temperature difference in the radial direction of the conductor due to the contact heat transfer between steel and aluminum based on previous studies. However, most studies are focused on normal conductors, not large cross-section conductors. Therefore, in this paper, the geometric model and temperature calculation model for 1250mm 2 large cross-section ACSR conductor, which is widely used in UHVDC, were established. Simulation of conductor temperature distribution was carried out, and the influence of wind velocity, environment temperature and current on radial temperature difference was analyzed. The results show that, with the increase of wind velocity and the decrease of current, the radial temperature difference of conductor decreases gradually, while the environment temperature has little influence on the radial temperature difference.
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/1802/4/042097
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2166409-2
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  • 7
    Online Resource
    Online Resource
    A study on characteristics of flow field around vehicle body
    IOP Publishing ; 2021
    In:  IOP Conference Series: Earth and Environmental Science Vol. 791, No. 1 ( 2021-06-01), p. 012067-
    Details
    In: IOP Conference Series: Earth and Environmental Science, IOP Publishing, Vol. 791, No. 1 ( 2021-06-01), p. 012067-
    Abstract: A numerical simulation calculation is performed using large eddy simulation method to investigate the characteristics of flow field around vehicle body, analyze the change rules of the velocity and pressure of the three-dimensional flow field around the vehicle body, as well as the frequency domain characteristics of the aerodynamic coefficients in the vehicle body. The results reveal that with the gradually expanding distance from the rear of the vehicle body, the velocity in the flow field around the vehicle body gradually recovers and reaches the incoming flow velocity at 0.9m from the rear of the vehicle body. Within the range of 0∼50HZ, the resistance coefficient and lift coefficient undergo a peak attenuation to about 20%, with a fluctuation of aerodynamic coefficient mainly within the range of 0∼500HZ. The research results are of certain significance and value for analyzing and applying the characteristics of flow field around vehicle body.
    Type of Medium: Online Resource
    ISSN: 1755-1307 , 1755-1315
    URL: Article
    DOI: 10.1088/1755-1315/791/1/012067
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2434538-6
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  • 8
    Online Resource
    Online Resource
    Finite superconducting square wire-network based on two-dimensional crystalline Mo 2 C
    IOP Publishing ; 2022
    In:  Chinese Physics B Vol. 31, No. 9 ( 2022-09-01), p. 097404-
    Details
    In: Chinese Physics B, IOP Publishing, Vol. 31, No. 9 ( 2022-09-01), p. 097404-
    Abstract: Superconducting wire-networks are paradigms to study Cooper pairing issues, vortex dynamics and arrangements. Recently, emergent low-dimensional crystalline superconductors were reported in the minimal-disorder limit, providing novel platforms to reveal vortices-related physics. Study on superconducting loops with high-crystallinity is thus currently demanded. Here, we report fabrication and transport measurement of finite square-network based on two-dimensional crystalline superconductor Mo 2 C. We observe oscillations in the resistance as a function of the magnetic flux through the loops. Resistance dips at both matching field and fractional fillings are revealed. Temperature and current evolutions are carried out in magnetoresistance to study vortex dynamics. The amplitude of oscillation is enhanced due to the interaction between thermally activated vortices and the currents induced in the loops. The driving current reduces the effective activation energy for vortex, giving rise to stronger vortex interaction. Moreover, by the thermally activated vortex creep model, we derive the effective potential barrier for vortex dissipation, which shows well-defined correspondence with structures in magnetoresistance. Our work shows that low-dimensional crystalline superconducting network based on Mo 2 C possesses pronounced potential in studying the modulation of vortex arrangements and dynamics, paving the way for further investigations on crystalline superconducting network with various configurations.
    Type of Medium: Online Resource
    ISSN: 1674-1056
    URL: Article
    DOI: 10.1088/1674-1056/ac67c7
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2412147-2
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  • 9
    Online Resource
    Online Resource
    Simplified models for LHC new physics searches
    IOP Publishing ; 2012
    In:  Journal of Physics G: Nuclear and Particle Physics Vol. 39, No. 10 ( 2012-10-01), p. 105005-
    Details
    In: Journal of Physics G: Nuclear and Particle Physics, IOP Publishing, Vol. 39, No. 10 ( 2012-10-01), p. 105005-
    Type of Medium: Online Resource
    ISSN: 0954-3899 , 1361-6471
    URL: Article
    DOI: 10.1088/0954-3899/39/10/105005
    RVK:
    UA 4720.G
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2012
    detail.hit.zdb_id: 1472964-7
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  • 10
    Online Resource
    Online Resource
    An artificial optoelectronic nociceptor based on In 2 S 3 memristor
    IOP Publishing ; 2022
    In:  Journal of Physics D: Applied Physics Vol. 55, No. 12 ( 2022-03-24), p. 125401-
    Details
    In: Journal of Physics D: Applied Physics, IOP Publishing, Vol. 55, No. 12 ( 2022-03-24), p. 125401-
    Abstract: Nociceptors are an indispensable part of the human nervous system that can sense potential dangers from external environmental stimuli. The biomimetic studies of artificial nociceptors have inspired advanced technology in neuromorphic computing, humanoid robots and artificial visual sensors. In this work, we demonstrate an artificial optoelectronic nociceptor using the memristor of large-area In 2 S 3 thin films. The nociceptor responds not only to electrical stimuli but also illumination of visual light, showing complete nociceptive behaviors of ‘threshold’, ‘inadaptation’, ‘relaxation’ and ‘sensitization’. The features of the sensory signal such as responding threshold, relaxation time and sensitivity can be tuned in controllable manner, by the strength and frequency of the external stimuli as well as the biasing of electrostatic gate. Such realization of sensory response to multiple external stimuli in the artificial perceptron demonstrates the feasibility of constructing advanced electronic receptor and artificial human eye.
    Type of Medium: Online Resource
    ISSN: 0022-3727 , 1361-6463
    URL: Article
    DOI: 10.1088/1361-6463/ac41f8
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 209221-9
    detail.hit.zdb_id: 1472948-9
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