A5067168697- Antenna Design and Analysis
- Advanced Antenna and Metasurface Technologies
- Hydrocarbon exploration and reservoir analysis
- Energy Harvesting in Wireless Networks
- Microwave Engineering and Waveguides
- Hydraulic Fracturing and Reservoir Analysis
- Metamaterials and Metasurfaces Applications
- Indoor and Outdoor Localization Technologies
- Methane Hydrates and Related Phenomena
- Antenna Design and Optimization
- Geological and Geophysical Studies
- RFID technology advancements
- High Temperature Alloys and Creep
- Atmospheric and Environmental Gas Dynamics
- Seismic Imaging and Inversion Techniques
- Electromagnetic wave absorption materials
- Metallurgy and Material Forming
- Tribology and Lubrication Engineering
- Enhanced Oil Recovery Techniques
- Energy, Environment, Economic Growth
- Petroleum Processing and Analysis
- Microstructure and Mechanical Properties of Steels
- UAV Applications and Optimization
- Advanced ceramic materials synthesis
- Adhesion, Friction, and Surface Interactions
China University of Petroleum, Beijing
2019-2025
Northwest University
2017-2025
North Minzu University
2016-2025
Beihang University
2023-2024
National Chung Shan Institute of Science and Technology
2024
Hefei University of Technology
2021-2024
Ningbo University of Technology
2024
Blackboard (United States)
2024
Beijing Forestry University
2022-2023
Tianjin International Joint Academy of Biomedicine
2022
As a major challenge and opportunity for traditional manufacturing, intelligent manufacturing is facing the needs of sustainable development in future. Sustainability assessment undoubtedly plays pivotal role future manufacturing. Aiming at this, paper presents digital twin driven information architecture sustainability oriented dynamic evolution under whole life cycle based on classic mapping system. The method segment includes indicator system building, value determination, importance...
A novel dual-polarized dipole antenna for base-station applications is presented in this letter. The proposed composed of a cross dipole, square loop, plate, and small-size reflector. loop the plate act as parasitic radiator director, respectively. By introducing two parts, impedance bandwidth can be significantly enhanced, broadside radiation patterns with narrow beam also obtained. Experimental results show that operate from 1.71 to 2.69 GHz low VSWRs at ports. High isolation ( > 22 dB)...
Improving agricultural green total factor productivity is crucial to promoting high-quality development. This paper selects the panel data of 30 provinces in China from 2009 2020 and uses super-efficiency SBM model with undesirable outputs measure all regions China. On this basis, fixed-effect spatial Durbin empirically discuss impact credit input on its spillover effect. The main conclusions are as follows: First, 2020, average values national, eastern, central, western 0.8909, 0.9977,...
The production of ceramic phase-reinforced high-entropy alloy composite coatings with excellent mechanical properties, high-temperature oxidation resistance, and corrosion resistance via laser cladding is a new hotspot in the field surface engineering. However, as alloys have wide range constituent systems different kinds particles are introduced ways that give unique microscopic organization, structure, synthesized performance, it necessary to review methods preparing cladding. In this...
A wideband omnidirectional circularly polarized (CP) microstrip antenna is proposed. The proposed composed of a disk-loaded coaxial probe, six shorting vias and circular patch with vortex slots. Three resonant modes, which include the TM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">01</sub> , top-loaded monopole xmlns:xlink="http://www.w3.org/1999/xlink">02</sub> conical radiation patterns can be simultaneously excited in structure by probe...
This study introduces a novel method to reduce the radar cross section (RCS) of wideband antennas. A absorbing material (RAM) with frequency selective surfaces (FSSs) is proposed. The RAM used as ground plane Yagi‐Uda and Vivaldi antenna for in‐band RCS reduction. measurement result shows that radiation pattern antennas over whole band preserved when used. can be reduced by more than 10 dB operating this method.
Person identification plays a critical role in large range of applications. Recently, RF based person becomes hot research topic due to the contact-free nature sensing that is particularly appealing current COVID-19 pandemic. However, existing systems still have multiple limitations: i) heavily rely on gait patterns users for identification; ii) require amount data train model and also extensive retraining new iii) frequency bandwidth which not available most commodity devices static...
Beamforming can improve the communication and sensing capabilities for a wide range of IoT applications. However, most existing devices cannot perform beamforming due to form factor, energy, cost constraints. This paper presents RFlens, reconfigurable metasurface that empowers low-profile with capabilities. The consists many unit-cells, each acting as phase shifter signals going through it. By encoding shifting values, RFlens manipulate electromagnetic waves "reshape" resteer beam pattern....
Based on the characteristics of underdeveloped areas, this paper selects panel data 15 counties in Anhui Province from 2013 to 2019 and uses threshold model empirically analyze sustainability rural tourism development. The results show that: (1) Rural development has a non-linear positive impact poverty alleviation areas double effect. (2) When rate is used express level, it can be found that at high level significantly promote alleviation. (3) number poor people reduction effect shows...
In this letter, a broadband low-profile dual circularly polarized reflectarray (dual-CP RA) for Ku-band satellite communications is proposed. A novel single-layer metasurface unit cell consisting of functional layer, an air layer and metal plate investigated first. The structure printed on the F4B substrate. can effectively extend bandwidth, overall profile only 0.12λ0, where λ0 represents wavelength at 11.725 GHz. To independently control phase left-handed (LHCP) right-handed (RHCP) waves,...
Tight oil is an important unconventional hydrocarbon resource. The differences in occurrence characteristics between light components (LCs) and heavy (HCs) of tight profoundly affect its mobility recovery. Current research has focused mainly on the rapid evaluation relative contents LCs, whereas few studies have systematically analyzed LCs HCs their controlling factors. In this study, differential are clarified basis data from thin-section petrography, X-ray diffraction, nuclear magnetic...
As one of the means informal environmental regulation, information disclosure has an essential impact on improving green energy efficiency. This paper selects panel data 113 cities in China from 2008 to 2018 and uses Super-efficiency SBM model with undesirable outputs measure Based measurement results, this empirically studies efficiency its spatial spillover effect using Durbin model. The main conclusions are as follows: 1) From 2018, average was 0.6676, regional distribution showed...
Using an unmanned aerial vehicle (UAV) to collect data from wireless sensor networks deployed in the field, one of key tasks is plan path for collection so as minimize energy consumption UAV. At present, most existing methods generally take shortest flight distance optimal objective path. They simply believe that means least UAV and ignore fact changing direction (heading) can also consume UAV’s its flight. If be planned based on closer real situation, really reduced working efficiency...
Abstract In this paper, a double-layer patterned graphene-based frequency-selective absorber (DGFSA) is proposed as means of reducing an antenna’s radar cross-section (RCS) while simultaneously increasing its gain. The antenna consists patch with Multi-Graphene Frequency Selective Absorber (MGFSA) mounted on top. DGFSA graphene and band-pass frequency selective surface (FSS). Two lossy layers different square resistances are used, which broaden the electromagnetic (EM) wave absorption...
Active reconfigurable FSS using pin diode for the antenna radar cross section (RCS) reduction is proposed. The reflector presented in this article. proposed able to be switched between band-stop with OFF-state diodes and band-pass ON-state around 3.8 GHz. of corresponds out-band RCS during operating, in-band nonoperating. Therefore, state scattering can according working radar. results show that contribute switchable band out antenna. radiation performance preserved when are ON state....