A5050481574- Metamaterials and Metasurfaces Applications
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Transportation Planning and Optimization
- Evaluation and Optimization Models
- Urban Transport and Accessibility
- Advanced Decision-Making Techniques
- Transportation and Mobility Innovations
- Smart Grid and Power Systems
- Advanced Measurement and Detection Methods
- Radio Frequency Integrated Circuit Design
- Acoustic Wave Phenomena Research
- Advanced Materials and Mechanics
- High-Voltage Power Transmission Systems
- Robotics and Sensor-Based Localization
- Military Defense Systems Analysis
- Advanced Manufacturing and Logistics Optimization
- Image and Object Detection Techniques
- Internet of Things and Social Network Interactions
- Advanced SAR Imaging Techniques
- Physics of Superconductivity and Magnetism
- Microwave Engineering and Waveguides
- PAPR reduction in OFDM
- Elevator Systems and Control
- 3D IC and TSV technologies
Central China Normal University
2020-2024
Huanggang Normal University
2017-2023
Xi'an Jiaotong University
2008-2023
Beijing University of Technology
2017-2018
NARI Group (China)
2018
Beijing Jiaotong University
2015
Los Alamos National Laboratory
2012
Tongji University
2011
PLA Electronic Engineering Institute
2006-2010
In this paper, a broadband metamaterial absorber with fractional bandwidth of 126.88% was presented. The characteristic mode theory used to guide the design absorber. According analysis and current, resistance value resistive films can be determined. different modal information obtained through parameter changes also better To study its operation mechanism, equivalent impedance surface current distribution proposed have been analyzed. final simulation measurement results show that has wide...
Abstract In recent years, reconfigurable metasurfaces have become research hotspots since they can manipulate electromagnetic waves dynamically and flexibly. The realisation of cost-effective energy-efficient wireless communications via intelligent surfaces (RISs) is attractive in various application scenerios. this work, a <?CDATA $+45^{\circ}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo>+</mml:mo> <mml:msup> <mml:mn>45</mml:mn> <mml:mrow>...
The acoustic cloak, which can make an object hard to detect acoustically in a homogeneous background, has attracted great attention from researchers recent years. inhomogeneous background media were considered this paper. relative constitutive parameters derived for cloaks working multilayered media. And unidirectional cloak layered was proposed, designed and implemented successfully wide frequency range. In water NaCl aqueous solution, the realized with metamaterials composed of steel...
In this paper, we proposed a dual-polarized bidirectional three-dimensional metamaterial absorber (3D-MA) with transmission windows. This 3D-MA can achieve broadband absorption in the range of 3.45-4.82 GHz for forward incident wave. Meanwhile, it possesses another band 1.89-3.84 backward waves. Due to its hollow 3D lattice structure, also has two additional windows at low frequency and high bands. The design is insensitive polarization maintains good angular stability oblique incidence up...
In preparation for an experiment with a laser-generated intense proton beam at the Laser Fusion Research Center Mianyang to investigate 11 B(p, α )2 reaction, we performed measurement very low energy between 140 keV and 172 using high-voltage platform Institute of Modern Physics, Lanzhou. The aim was test ability use CR-39 track detectors cross-section measurements remeasure this reaction close first resonance thick target approach. We obtained σ = 45.6 ± 12.5 mb near 156 keV. Our result...
In recent years, customized bus as an innovative mode has become important choice of public transport. It helps to change transportation structure and alleviate traffic congestion, which great efficiency for energy conservation emission reduction. However, it is relatively simple cannot be well integrated into the intelligent system. Therefore, this paper discusses dispatching strategies on basis dynamic information. Finally, example given confirm effectiveness these strategies. We...
In this paper, a two-dimensional acoustic ground cloak with alternating layered structure composed of mercury and water is designed on the basis transformation acoustics effective medium theory. The exhibits excellent cloaking performance to hide an object from detection waves. Cosine similarity proposed precisely quantize evaluate performance, which turns out be succinct effective. Numerical simulations confirm that could work well in broad frequency band displays oscillatory decrease...
This article designs a frequency-selective rasorber (FSR) with broadband transmission window. It is synthesized by absorber and surface (FSS). The resistive layer achieves absorption introducing tortuous Jerusalem cross load lumped resistors, the lossless FSS adopts three-layer metal structure to realize mechanism of analyzed using theory characteristic mode. position resistor determined according analysis mode current distribution parameter optimization. Prototypes were fabricated measured,...
Abstract In recent years, particular physical phenomena enabled by non-Hermitian metamaterial systems have attracted significant research interests. this paper, a three-dimensional near the exceptional point (EP) is proposed to demonstrate extremely asymmetric absorption and reflection. Unlike its conventional counterparts, constructed with loss-assisted design. Localized losses are introduced into structure combining our technique of graphene-based resistive inks printed circuit board...
We present the design, implementation and detailed performance analysis for a class of trapeziform flat acoustic cloaks. An effective large invisible area is obtained compared with traditional carpet cloak. The cloaks are realized homogeneous metamaterials which made periodic arrangements subwavelength unit cells composed steel embedded in air. microstructures its parameters determined quickly precisely broadband frequency range by using medium theory proposed optimization method....
High-order bandpass filtering responses are highly desirable for frequency-selective surfaces (FSSs) in narrowband antenna/radar systems. In this paper, the design process of a reconfigurable dual-band FSS with second-order response is presented. Initially, basic dumbbell-shaped resonator used theoretically investigated using characteristic mode analysis (CMA) method to study relation between geometric parameters and excited orthogonal resonance modes different frequency bands. Then, an...
A miniaturized frequency selective rasorber (FSR) with high selectivity passband and wideband absorption properties is presented. Its performance as an absorber over a wide band from 8.08 to 18.08 GHz through the structure of metal incurved square loop loaded resistors. The surface (FSS) using Jerusalem cross array metallic patch realizes transmission 2.7 3.52 GHz. And insertion loss (IL) 0.37 dB at 3.08 symmetry elements design enable proposed FSR achieve satisfactory incident angle...
Research was done to reveal what factors of the waiting environment influence competitiveness public transit. A sample travelers from Jiading district Shanghai used answer questionnaires including social characteristics, satisfaction, and demands in bus stop environment. An ordered logit model developed determine most significant compared with satisfaction survey. The findings show that if stops are provided more comfortable, convenient, identifiable environment, will choose more, but differ...
Abstract In this paper, a multi-functional frequency selective polarization converter (FSPC) based on the substrate integrated waveguide cavities (SIWC) is presented. The proposed structure circular shape SIWC with orthogonal rectangular slots top/bottom layer of each unit cell. neighboring are connected to other by metalized vias which formed shared diamond cavity. Two cross serve as additional input and output channel for SIW novel design introduces more functions device. When device acts...
Fast isolating switch is one of the key components Hybrid DC circuit breaker. It difficult for conventional breakers to provide such a fast operating speed when switching time within few milliseconds. In this paper, based on study vacuum switch, focusing application small gap in isolation, arcless breaking situation, series experiments were designed. After solving problems synchronous as well voltage distribution every break, 200kV with less than 3ms developed, And through whole test
A novel dual-polarized transmissive/absorptive frequency-selective rasorber (FSR) with an ultrawide absorption spectrum covering both the X- and Ku-bands is proposed in this paper. The FSR constructed from a bottom lossless transmission layer top lossy layer, which resistor-loaded incurved square loop strip line structure utilized to obtain band. To quantitatively analyze its operation principle, accurate equivalent circuit model of was developed. 2D prototype designed, assembled,...
In this paper, an asymmetric three-dimensional metamaterial absorber (3D-MA) for microwave application is presented. The designed 3D-MA composed of a hollow vertical periodic crossed mesh array. Two metal split ring resonators (SRRs) different sizes are printed on the substrate. mechanism deeply analyzed and discussed from perspective equivalent circuit. final simulation results show that can achieve broadband absorption with absorptivity over 80% in frequency range 1.84-2.8 GHz 2.9-3.72...
Bus rapid transit (BRT) is an important mode in the urban transportation system, especially improving transit's operating efficiency.The accessibility of BRT factor to measure its service level, however, most existing methods calculating can hardly reflect real-time changes due lack consideration for time-varied vehicle capacity or passenger's walking distance.Therefore, a new enhanced two-step floating catchment technique (E2SFCA) proposed calculate dynamic instead traditional (2SFCA) by...