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  • IOP Publishing  (10)
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  • IOP Publishing  (10)
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  • 1
    Online Resource
    Online Resource
    The remote control research based on the Android platform
    IOP Publishing ; 2020
    In:  Journal of Physics: Conference Series Vol. 1605, No. 1 ( 2020-08-01), p. 012032-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 1605, No. 1 ( 2020-08-01), p. 012032-
    Abstract: With the rapid development of mobile terminals and wireless networks, the relationships between computers and mobile phones are more and more closely. Now, the mobile phones and computer become indispensable to modern society in the daily life. The information transmission and exchange between them has become increasingly frequent. The purpose of this research is to find a safe way of connection with low cost, low power consumption, convenient and flexible, so that we can finish the information exchange quickly and accurately between mobile phone and computer. Because of using a socket connection mode, the physical line media is not needed.
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/1605/1/012032
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2166409-2
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  • 2
    Online Resource
    Online Resource
    Advances in bismuth-based topological quantum materials by scanning tunneling microscopy
    IOP Publishing ; 2022
    In:  Materials Futures Vol. 1, No. 3 ( 2022-09-01), p. 032202-
    Details
    In: Materials Futures, IOP Publishing, Vol. 1, No. 3 ( 2022-09-01), p. 032202-
    Abstract: In recent years, topological quantum materials (TQMs) have attracted intensive attention in the area of condensed matter physics due to their novel topologies and their promising applications in quantum computing, spin electronics and next-generation integrated circuits. Scanning tunneling microscopy/spectroscopy (STM/STS) is regarded as a powerful technique to characterize the local density of states with atomic resolution, which is ideally suited to the measurement of the bulk-boundary correspondence of TQMs. In this review, using STM/STS, we focus on recent research on bismuth-based TQMs, including quantum-spin Hall insulators, 3D weak topological insulators (TIs), high-order TIs, topological Dirac semi-metals and dual TIs. Efficient methods for the modulation of the topological properties of the TQMs are introduced, such as interlayer interaction, thickness variation and local electric field perturbation. Finally, the challenges and prospects for this field of study are discussed.
    Type of Medium: Online Resource
    ISSN: 2752-5724
    URL: Article
    DOI: 10.1088/2752-5724/ac84f5
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 3106737-2
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    Online Resource
  • 3
    Online Resource
    Online Resource
    High-Temperature Characteristics of Strain in AlGaN/GaN Heterostructures
    IOP Publishing ; 2006
    In:  Japanese Journal of Applied Physics Vol. 45, No. 1A ( 2006-1-10), p. 18-20
    Details
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 45, No. 1A ( 2006-1-10), p. 18-20
    Type of Medium: Online Resource
    ISSN: 0021-4922 , 1347-4065
    URL: Article
    DOI: 10.1143/JJAP.45.18
    RVK:
    UA 4210.1
    RVK:
    UA 4210.2
    RVK:
    UA 4210
    Language: English
    Publisher: IOP Publishing
    Publication Date: 2006
    detail.hit.zdb_id: 218223-3
    detail.hit.zdb_id: 797294-5
    detail.hit.zdb_id: 2006801-3
    detail.hit.zdb_id: 797295-7
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Operation optimization study of integrated energy system based on multi-energy complementary
    IOP Publishing ; 2022
    In:  Journal of Physics: Conference Series Vol. 2237, No. 1 ( 2022-03-01), p. 012031-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 2237, No. 1 ( 2022-03-01), p. 012031-
    Abstract: Integrated energy systems integrate power and heat supply systems, and explore the energy saving potential of the systems by means of multi-energy coordination. For two typical multi-energy complementary integrated energy systems, the key factors affecting the system energy consumption are searched for, based on which a comprehensive evaluation model is established, and then a coordinated control method is proposed, which can be used to guide the operation optimization of the multi-energy complementary energy system.
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/2237/1/012031
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2166409-2
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  • 5
    Online Resource
    Online Resource
    Study on Overpressure Explosion of Oil and Gas Pipelines and Risk Prevention & Control Measures
    IOP Publishing ; 2023
    In:  Journal of Physics: Conference Series Vol. 2520, No. 1 ( 2023-06-01), p. 012028-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 2520, No. 1 ( 2023-06-01), p. 012028-
    Abstract: In view of the flammable and explosive characteristics of oil and gas pipeline transportation medium, once it leaks, production safety accidents are easy to occur. This study uses explosions with severe consequences caused by natural gas pipeline leakage as an example. The risk factors and accident modes of oil and gas storage and transportation pipelines are analyzed; the explosion load is calculated by a scaling explosion prediction model with the TNO multi-energy method; the relationship between overpressure load and combustible gas cloud radius is studied. The methane-air explosion volume fraction of 9.5% is taken as another example, with which the overpressure attenuation law of explosion wave is obtained. Based on the above research, safety risk prevention and control measures are proposed. The research results can provide technical support for daily management and risk prevention and control of oil and gas storage and transportation pipelines.
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/2520/1/012028
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 2166409-2
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  • 6
    Online Resource
    Online Resource
    Homologous post-treatment strategy enabling phase-pure α-FAPbI 3 films
    IOP Publishing ; 2023
    In:  Nanotechnology Vol. 34, No. 36 ( 2023-09-03), p. 365707-
    Details
    In: Nanotechnology, IOP Publishing, Vol. 34, No. 36 ( 2023-09-03), p. 365707-
    Abstract: Formamidinium lead triiodide (FAPbI 3 ) is considered as the prospective light-absorbing layer on account of the close-to-ideal bandgap of the α -phase, wide optical absorption spectrum and good thermal stability. Therefore, how to realize δ to α -phase transition to obtain phase-pure α -FAPbI 3 without additives is important for FAPbI 3 perovskite films. Herein, a homologous post-treatment strategy (HPTS) without additives is proposed to prepare FAPbI 3 films with pure α -phase. The strategy is processed along with dissolution and reconstruction process during the annealing. The FAPbI 3 film has tensile strain with the substrate, and the lattice keeps tensile, and the film maintains in an α / δ hybrid phase. The HPTS process releases the tensile strain between the lattice and the substrate. The process of strain release realizes the phase transition from δ to α -phase during this process. This strategy can accelerate the transformation from hexagonal δ -FAPbI 3 to cubic α -FAPbI 3 at 120 °C. As a result, the acquired α -FAPbI 3 films exhibit better film quality in optical and electrical properties, accordingly achieving device efficiency of 19.34% and enhanced stability. This work explores an effective approach to obtain additive-free and phase-pure α -FAPbI 3 films through a HPTS to fabricate uniform high-performance α -FAPbI 3 perovskite solar cells.
    Type of Medium: Online Resource
    ISSN: 0957-4484 , 1361-6528
    URL: Article
    DOI: 10.1088/1361-6528/acdd0b
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 1362365-5
    SSG: 11
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  • 7
    Online Resource
    Online Resource
    A Stellar Ranging Scheme Based on the Second-order Correlation Measurement
    IOP Publishing ; 2022
    In:  Research in Astronomy and Astrophysics Vol. 22, No. 1 ( 2022-01-01), p. 015021-
    Details
    In: Research in Astronomy and Astrophysics, IOP Publishing, Vol. 22, No. 1 ( 2022-01-01), p. 015021-
    Abstract: Stellar ranging is the basis for stellar dynamics research and in-depth research on astrophysics. The parallax method is the most widely used and important basic method for stellar ranging. However, it needs to perform high-precision measurement of the parallax angle and the baseline length together. We aim to propose a new stellar ranging scheme based on second-order correlation that does not require a parallax angle measurement. We hope our solution can be as basic as the parallax method. We propose a new stellar ranging scheme by using the offset of second-order correlation curve signals. The optical path difference between the stars and different base stations is determined by the offset of the second-order correlation curve signals. Then the distance of the stars could be determined by the geometric relation. With the distance to stars out to 10 kpc away, our astrometric precision can be better compared to Gaia by simulation. We also design an experiment and successfully demonstrate the feasibility of this scheme. This stellar ranging scheme enables further and more accurate stellar ranging without requiring any prior information or angle measurement.
    Type of Medium: Online Resource
    ISSN: 1674-4527
    URL: Article
    DOI: 10.1088/1674-4527/ac3a66
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2511247-8
    SSG: 6,25
    SSG: 16,12
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    Online Resource
  • 8
    Online Resource
    Online Resource
    Decoding multiclass motor imagery EEG from the same upper limb by combining Riemannian geometry features and partial least squares regression
    IOP Publishing ; 2020
    In:  Journal of Neural Engineering Vol. 17, No. 4 ( 2020-08-01), p. 046029-
    Details
    In: Journal of Neural Engineering, IOP Publishing, Vol. 17, No. 4 ( 2020-08-01), p. 046029-
    Abstract: Objective . Due to low spatial resolution and poor signal-to-noise ratio of electroencephalogram (EEG), high accuracy classifications still suffer from lots of obstacles in the context of motor imagery (MI)-based brain-machine interface (BMI) systems. Particularly, it is extremely challenging to decode multiclass MI EEG from the same upper limb. This research proposes a novel feature learning approach to address the classification problem of 6-class MI tasks, including imaginary elbow flexion/extension, wrist supination/pronation, and hand close/open within the unilateral upper limb. Approach . Instead of the traditional common spatial pattern (CSP) or filter-bank CSP (FBCSP) manner, the Riemannian geometry (RG) framework involving Riemannian distance and Riemannian mean was directly adopted to extract tangent space (TS) features from spatial covariance matrices of the MI EEG trials. Subsequently, to reduce the dimensionality of the TS features, the algorithm of partial least squares regression was applied to obtain more separable and compact feature representations. Main results . The performance of the learned RG feature representations was validated by a linear discriminative analysis and support vector machine classifier, with an average accuracy of 80.50% and 79.70% on EEG dataset collected from 12 participants, respectively. Significance . These results demonstrate that compared with CSP and FBCSP features, the proposed approach can significantly increase the decoding accuracy for multiclass MI tasks from the same upper limb. This approach is promising and could potentially be applied in the context of MI-based BMI control of a robotic arm or a neural prosthesis for motor disabled patients with highly impaired upper limb.
    Type of Medium: Online Resource
    ISSN: 1741-2560 , 1741-2552
    URL: Article
    DOI: 10.1088/1741-2552/aba7cd
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2135187-9
    SSG: 12
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  • 9
    Online Resource
    Online Resource
    Surface-confinement assisted synthesis of nitrogen-rich single atom Fe−N/C electrocatalyst with dual nitrogen sources for enhanced oxygen reduction reaction
    IOP Publishing ; 2021
    In:  Nanotechnology Vol. 32, No. 30 ( 2021-07-23), p. 305402-
    Details
    In: Nanotechnology, IOP Publishing, Vol. 32, No. 30 ( 2021-07-23), p. 305402-
    Abstract: The utilization of earth abundant iron and nitrogen doped carbon as a precious-metal-free electrocatalyst for oxygen reduction reaction (ORR) significantly depends on the rational design and construction of desired Fe−N x moieties on carbon substrates, which however remains an enormous challenge. Herein a typical nanoporous nitrogen-rich single atom Fe−N/C electrocatalyst on carbon nanotube (NR-CNT@FeN-PC) was successfully prepared by using CNT as carbon substrate, polyaniline (PANI) and dicyandiamine (DCD) as binary nitrogen sources and silica-confinement-assisted pyrolysis, which not only facilitate rich N-doping for the inhibition of the Fe agglomeration and the formation of single atom Fe−N x sites in carbon matrix, but also generate more micropores for enlarging BET specific surface area (up to 1500 m 2 ·g −1 ). Benefiting from the advanced composition, nanoporous structure and surface hydrophilicity to guarantee the sufficient accessible active sites for ORR, the NR-CNT@FeN-PC catalyst under optimized conditions delivers prominent ORR performance with a half-wave potential (0.88 V versus RHE) surpass commercial Pt/C catalyst by 20 mV in alkaline electrolyte. When assembled in a home-made Zn−air battery device as cathodic catalyst, it achieved a maximum output power density of 246 mW·cm −2 and a specific capacity of 719 mA·h·g −1 Zn outperformed commercial Pt/C catalyst, holding encouraging promise for the application in metal-air batteries.
    Type of Medium: Online Resource
    ISSN: 0957-4484 , 1361-6528
    URL: Article
    DOI: 10.1088/1361-6528/abf8db
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 1362365-5
    SSG: 11
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  • 10
    Online Resource
    Online Resource
    The noble metals M (M = Pd, Ag, Au) decorated CeO 2 catalysts derived from solution combustion method for efficient low-temperature CO catalytic oxidation: effects of different M loading on catalytic performances
    IOP Publishing ; 2022
    In:  Nanotechnology Vol. 33, No. 41 ( 2022-10-08), p. 415705-
    Details
    In: Nanotechnology, IOP Publishing, Vol. 33, No. 41 ( 2022-10-08), p. 415705-
    Abstract: The noble metal nanoparticles have attracted attention due to their excellent catalytic performance for CO oxidation at low temperatures. M-CeO 2 (M = Pd, Ag, Au) catalysts with different atomic ratios of M/Ce were deposited via solution combustion method. Among them, 3 at% Pd-CeO 2 , 5 at% Ag-CeO 2 and 1 at% Au-CeO 2 catalysts have better catalytic performances. Especially, 5 at% Ag-CeO 2 catalyst shows better low-temperature CO oxidation performance. The catalytic activity for CO oxidation follows the follows the following sequence: 5 at% Ag-CeO 2 (T 50  = 69 °C) 〉 3 at% Pd-CeO 2 (T 50  = 99 °C) 〉 1 at% Au-CeO 2 (T 50  = 115 °C). Meanwhile, the catalysts are characterized by means of powder x-ray diffraction, scanning electron microscope, transmission electron microscopy, Raman spectroscopy, x-ray photoelectron spectroscopy, Brunauer–Emmett–Teller and H 2 -TPR. The characterization results show that the 5 at% Ag-CeO 2 catalyst has excellent catalytic activity due to the good dispersion of Ag nanoparticles, the specific surface area of the material, and the reduction catalyst between different valence ions. Moreover, the surface of the catalyst enhances the mutual synergy, effectively promotes the generation of oxygen vacancies, and increases the active oxygen content of the catalyst surface. Finally, the catalytic mechanism of M-CeO 2 catalysts is summarized.
    Type of Medium: Online Resource
    ISSN: 0957-4484 , 1361-6528
    URL: Article
    DOI: 10.1088/1361-6528/ac7ed3
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 1362365-5
    SSG: 11
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