A5063061958- Antenna Design and Analysis
- Metamaterials and Metasurfaces Applications
- Energy Harvesting in Wireless Networks
- Microwave Engineering and Waveguides
- Gyrotron and Vacuum Electronics Research
- Topic Modeling
- Advanced Antenna and Metasurface Technologies
- Text Readability and Simplification
- Wireless Power Transfer Systems
- Natural Language Processing Techniques
- Sentiment Analysis and Opinion Mining
- Network Security and Intrusion Detection
- Spam and Phishing Detection
- Advanced Graph Neural Networks
- Complex Network Analysis Techniques
- Antenna Design and Optimization
- Recommender Systems and Techniques
- Insurance, Mortality, Demography, Risk Management
- High Temperature Alloys and Creep
- Opinion Dynamics and Social Influence
- Fatigue and fracture mechanics
- Healthcare Operations and Scheduling Optimization
- demographic modeling and climate adaptation
- Optical Wireless Communication Technologies
- Microstructure and Mechanical Properties of Steels
Xi’an University of Posts and Telecommunications
2021-2025
Institute of Microelectronics
2025
Chinese Academy of Sciences
2025
Shanghai Aerospace Automobile Electromechanical (China)
2025
Harbin Medical University
2024-2025
Second Affiliated Hospital of Harbin Medical University
2024-2025
Nanjing Tech University
2023-2024
Xidian University
2017-2024
University of Southampton
2024
First Affiliated Hospital of Shihezi University Medical College
2024
A dual-band and polarization-angle-independent rectifying metasurface (MS) with a miniaturized dimension wide incident angle range are presented in this article. The proposed structure consists of single layer periodic cell arrays integrated diodes, dc feed, load. novel method incorporating surface-mount components (e.g., diodes) into the texture is developed to simplify structure. matching network between MS nonlinear rectifier can be eliminated directly due multimode resonance adjustable...
In this paper, wireless power transfer (WPT) and energy harvesting (EH) technologies are reviewed in detail, the application of metamaterials metasurfaces for WPT EH is discussed. Specifically, we focus on ambient radio frequency (AEH) recent advances, comments, existing challenges, future directions. The performance metasurface- antenna-based AEH systems compared. not only enable efficient operation system but also extend potential function to various kinds devices, which influential...
In this paper, a tri-band miniaturized wide-angle and polarization-insensitive metasurface is proposed as an ambient energy collector. The composed of subwavelength butterfly-type closed-ring (BCR) array attached to low-loss substrate with metallic ground. Each unit cell the harvesting has only one port. Its efficiency for different polarization incident angles was analyzed, results show that maximum 90%, 83%, 81% at three frequency bands 0.9 GHz, 2.6 5.7 respectively. Moreover, prototype 7...
A new design of dual-polarization and multi-focus near-field focusing (NFF) reflective metasurface for wireless power transfer (WPT) system is proposed in this paper. In terms multi-beam phase synthesis metasurface, the with independent regulation characteristics introduced to realize high-efficiency WPT. The single-feed single-focus dual-focus working at X-band (10 GHz) 26 × elements two polarizations are designed, fabricated measured by planar scanning experiments. Furthermore, a compact...
A miniaturized, high electronic efficiency, S-band metamaterial extended interaction klystron (MEIK) is proposed. The metamaterial-based resonant cavities were designed, fabricated, and tested, the assembled cold-tested results confirm feasibility of miniaturization in MEIK. Furthermore, particle-in-cell (PIC) simulation predicts that, typically, when beam voltage current are 30 kV 3 A, respectively, focusing magnetic field 1000 G, a 3-cavity MEIK yields output power 56 kW at 2.453 GHz, with...
A new wide-angle and polarization-insensitive metasurface (MS) instead of traditional antenna is built as the primary ambient energy harvester in this paper. The MS a two-dimensional harvesting array that composed subwavelength electrical small ring resonator working at 2.5 GHz (LTE/WiFi). In case different polarization incidence angles, we demonstrate can achieve high efficiency 90%. fabricated prototype 9 × measured, experimental results validate proposed has good performance more than 80%...
Enormous concerns focus on the high-power and wide bandwidth traveling-wave tube (TWT) for its outstanding performance. In this article, a shape-optimized staggered double-vane slow-wave structure (SWS) terahertz (THz) sheet beam TWT is proposed. The SWS takes advantages of higher interaction impedance, lower transmission loss, phase velocity than conventional SWSs. with 85 periods designed, fabricated, cold tested. measured loss less 0.79 dB/cm in frequency range 0.211–0.26 THz, which good...
<p>The outbreak of the COVID-19 epidemic has caused major changes in China’s economic environment. This paper takes new crown early 2020 as a node, and annual reports A-share listed companies from 2018 to 2021 sample, uses price model income empirically test impact on after accounting information property rights. The moderating effect structure both. research results show that enhanced correlation surplus value, normalization stage epidemic, value will return original state, while...
Fabrics with a higher level of inter-yarn friction usually demonstrate better impact resistance, as suggested by various studies on the response ballistics-resistant fabrics. Over past decade, significant efforts have been made to improve frictional properties fabrics, for example, surface coatings. However, influence fiber micro-structure coefficient yarns has not extensively studied. In this paper, method is proposed improving using profiled fibers non-circular cross-sections and twisted...
This work experimentally demonstrates a novel molybdenum disulfide (MoS 2 ) field‐effect transistor (FET) based on negative capacitance (NC) and Dirac source (DS) hybrid technique. The synergistic mechanism enhances both carrier transport gate control, enabling steep slope significantly increased on‐state current. By this design, NCDS FET achieves ultrahigh current of 100 μA, low average subthreshold swing (SS) 60.3 mV dec −1 over approximately two orders magnitude in I DS minimum 6...
A novel electron-optical system (EOS) for <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${G}$ </tex-math></inline-formula> -band traveling-wave tubes (TWT) is investigated by simulation and verified experiment. The EOS includes a sheet beam electron gun, tunable periodic cusped magnetic focusing (TPCMF), collector. An elliptical focus electrode (FE) featuring simple geometry easy fabrication utilized to...
We propose a novel transparent metasurface antenna (metantenna) based on indium tin oxide (ITO) material for simultaneously achieving wireless energy harvesting (WEH) at radio frequency (RF) bands and efficient transmission of visible light. adopt the design method aperture-coupled metantenna to realize broadband low-profile RF WEH. Then, we replace conventional opaque metal with an ITO coating sheet impedance <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...
A dual-band, wideband rectenna designed for simultaneous wireless information and power transfer (SWIPT) through the innovative use of a reverse Wilkinson divider is proposed in this letter. This approach diverges from traditional method, which involves loading antenna with divider. Specifically, work introduces novel concept that repurposes manner, thereby endowing it new function when integrated an antenna. The consists primarily slotted square metal patch, divider, rectifying circuit....
The low flow characteristics of heavy oil have brought many challenges to its exploitation. Looking for a cost-effective crude improver reduce the viscosity is currently most important challenge. Small-molecule improvers meet above requirements and become an ideal target oilfield production. In this article, three kinds barium salts alkylbenzene sulfonates with different lengths alkyl chains were synthesized from sulfonic acid hydroxide. Among them, reduction effect dodecylbenzenesulfonate...
Simultaneous wireless information and power transfer (SWIPT) presents a paradigm shift in future sensing networks (WSNs) industrial Internet of Things (IoT). A robust receiver capable effectively capturing random signals from diverse environments is utmost importance. To address this, we propose multi-polarization wideband rectenna design, which integrates novel symmetrical five-port hybrid-ring coupler highly efficient Class-F rectifier compact manner. Due to the high symmetry between ring...
Computational Social Science (CSS), aiming at utilizing computational methods to address social science problems, is a recent emerging and fast-developing field. The study of CSS data-driven significantly benefits from the availability online user-generated contents networks, which contain rich text network data for investigation. However, these large-scale multi-modal also present researchers with great challenge: how represent effectively mine meanings we want in CSS? To explore answer,...
This paper presents results from the third Thermal Image Super-Resolution (TISR) challenge organized in Perception Beyond Visible Spectrum (PBVS) 2022 workshop. The uses same thermal image dataset as first two challenges, with 951 training images and 50 validation at each resolution. A set of 20 was kept aside for testing. evaluation tasks were to measure PSNR SSIM between SR ground truth (HR noisy downsampled by four), also semi-registered HR (acquired another camera). outperformed those...