Yanyun Liu

ORCID: 0000-0003-2581-8274
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About
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Research Areas
  • Microwave Engineering and Waveguides
  • Antenna Design and Analysis
  • Advanced Sensor and Energy Harvesting Materials
  • Advanced Computational Techniques and Applications
  • Photonic and Optical Devices
  • Energy, Environment, and Transportation Policies
  • Flow Measurement and Analysis
  • Climate Change Policy and Economics
  • Advanced Antenna and Metasurface Technologies
  • Advanced Fiber Optic Sensors
  • Web Data Mining and Analysis
  • Advanced Sensor Technologies Research
  • Radio Frequency Integrated Circuit Design
  • Electric Motor Design and Analysis
  • Advanced Sensor and Control Systems
  • Photonic Crystal and Fiber Optics
  • Rough Sets and Fuzzy Logic
  • Conducting polymers and applications
  • Network Security and Intrusion Detection
  • Optical Coatings and Gratings
  • Full-Duplex Wireless Communications
  • Energy Efficiency and Management
  • Energy, Environment, Economic Growth
  • Intermetallics and Advanced Alloy Properties
  • Photonic Crystals and Applications

Dongguan People’s Hospital
2025

Southern Medical University
2025

Harbin Institute of Technology
2021-2024

Jinzhong University
2024

St Petersburg University
2024

Soochow University
2024

Shandong University
2023-2024

PLA Army Engineering University
2012-2023

Taiyuan University of Technology
2023

East China Jiaotong University
2023

Inflammation and cartilage degeneration are critical challenges in osteoarthritis (OA) treatment. Achieving sustained drug efficacy while mitigating the adverse effects of inflammation reactive oxygen species remains a significant challenge. This study synthesizes gallic acid-magnesium (GA-Mg) metal–organic framework (MOF) as carrier for puerarin (PA). The PA-loaded GA-Mg MOF (pGM) is encapsulated within chondroitin sulfate methacrylate, forming monodisperse hybrid microspheres (CM@pGM)...

10.1021/acsami.4c22415 article EN ACS Applied Materials & Interfaces 2025-02-17

Stemming or lemmatization method is a key step in English document processing. Based on three clustering algorithms and two evaluation functions, the paper makes comprehensive study about stemming one algorithm. According to experimental result, it shows that performance not remarkable, compared with Snowball stemmer Stanford lemmatization, Porter can make better entropy purity.

10.1109/csae.2012.6272740 article EN 2012-05-01

Abstract Polypyrrole (PPy)/polypropylene fibrous membrane (PPF) composite materials with different PPy contents are prepared through in situ chemical oxidation polymerization the pyrrole atmosphere at room temperature by dissolving FeCl 3 ·6H 2 O methanol and acetonitrile as oxidant. The morphology of is examined scanning electron microscope (SEM), conductivities composites measured convenient four‐probe method, properties capacitor cells assembled obtained PPy/PPF investigated cyclic...

10.1002/app.34438 article EN Journal of Applied Polymer Science 2011-07-12

The human radial artery pulse carries a rich array of biomedical information. Accurate detection signal waveform and the identification corresponding condition are helpful in understanding health status body. In process detection, there some problems, such as inaccurate location key points, poor noise reduction effect low accuracy recognition. this system, is collected by main control circuit new piezoelectric sensor combined with wearable wristband, creating hardware circuit. points located...

10.3390/s23020835 article EN cc-by Sensors 2023-01-11

A theoretical study of optical properties phase shift defects in one-dimensional asymmetrical photonic structures consisting two rugate segments with different periodicities at both normal and oblique incidence is presented.Using the propagation matrix method we numerically calculated transmittance spectra, defect wavelengths, energy density distributions, group velocities for TE TM waves, respectively.Our shows that by adjusting periodicity one segment, wavelengths can be shifted toward...

10.2528/pier10121106 article EN Electromagnetic waves 2011-01-01

Abstract In this article, a novel tri‐band wideband microstrip bandpass filter (BPF) with compact size and high selectivity is proposed using three sets of resonators, that is, λ/4 short‐stub loaded resonator, λ/2 resonators.Each the resonators can not only separately generate one passband, but also mainly control passband performance. Due to extended feed lines, parasitic coupling intrinsic characteristics multiple transmission zeros be created improve selectivity. A BPF centered at 2.0,...

10.1002/mop.27334 article EN Microwave and Optical Technology Letters 2012-12-21

Abstract A tri‐band microstrip bandpass filter (BPF) with compact size and high selectivity is presented by using the stub‐loaded resonator (SLR) quarter‐wavelength stepped‐impedance (SIR). The SIR designed for first third passband SLR mainly controls second performance, so three frequencies can be flexibly tuned. Because of intrinsic characteristics resonators source‐load coupling, multiple transmission zeros created to improve selectivity. Finally, a BPF prototype located at 0.98 GHz (FRID...

10.1002/mop.27247 article EN Microwave and Optical Technology Letters 2012-11-20

Abstract In this article, a dual‐mode microstrip bandpass filter (BPF) with compact size, sharp skirt, and wide upper‐stopband performance is proposed using the short‐stub‐loaded open loop stepped‐impedance resonator source‐load coupling structure. The advantageous features of are that even‐mode resonant frequencies can be controlled exclusively by short stub, two transmission zeros created near passband stub folded arms. Meanwhile, generated structure applied to suppress first second...

10.1002/mop.26881 article EN Microwave and Optical Technology Letters 2012-04-14

Abstract In this letter, a novel compact and high selectivity dual‐mode dual‐band microstrip bandpass filter (BPF) with quarter‐wavelength resonator stub‐loaded is proposed using extended feed lines.Either of the SIRs cannot only separately generate one passband but also mainly control performance. Due to lines, parasitic coupling intrinsic characteristics resonators, multiple transmission zeros can be created improve selectivity. Meanwhile, BPF obtain size due folded resonators lines. A...

10.1002/mop.27211 article EN Microwave and Optical Technology Letters 2012-09-25

We theoretically investigated optical properties of phase shift defects in one-dimensional rugate photonic structures at oblique incidence. Transmission spectra and energy density distributions such continuous gradient-index with were numerically calculated for TE TM waves using the propagation matrix method. The study shows that when angle incidence increases, (1) wavelength defect mode shifts to a shorter wavelength, (2) stop band structure moves toward region, (3) bandwidth is enlarged...

10.2528/pier10110312 article EN Electromagnetic waves 2011-01-01

Abstract In this article, a novel compact and high performance microstrip diplexer is designed for global position system (GPS) wireless local area network (WLAN) applications. The consists of two filters with short centered stepped impedance resonators (SCSIRs) quarter‐wavelength (QWRs), operated at 1.575 GHz 5.8 GHz, respectively. Due to the intrinsic characteristics mutual loading effect filters, multiple transmission zeros can be generated achieve sharp skirt, wide stopband, isolation...

10.1002/mop.27550 article EN Microwave and Optical Technology Letters 2013-03-27

A graph grammar is a formal tool for providing rigorous but intuitive ways to define visual languages. However, the description and implementation difficulties of grammars hinder their wide applications. This paper, first all introduces mechanism specifying existing Edge-based Graph Grammar (EGG) by using XML techniques. Then, based on mechanism, new parsing algorithm proposed, which easily designed implemented technique.

10.1109/icccnt.2015.7395225 article EN 2022 13th International Conference on Computing Communication and Networking Technologies (ICCCNT) 2015-07-01
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