Explanipedia

Assessing random forest performance in low resource speech emotion recognition Open

Muhammad Adeel, Zhi-Yong Tao, Shu-Ya Jin, Chuanjie Guo, Mohammed Alsuhaibani · 2025

In human-computer interaction (HCI), speech emotion recognition (SER) is a pivotal technology that enables machines to decipher human emotions. This study delves into the efficacy of employing a random forest (RF) classifier for SER within…

Continuous-Control-Set Model Predictive Control Strategy for MMC-UPQC Under Non-Ideal Conditions Open

Lianghua Chen, Zhou Jian-ping, Junyong Zhai, Lisheng Yang, Xudong Qian , et al. · 2025

In the MMC-based unified power quality conditioner (MMC-UPQC), the computational burden of finite-control-set model predictive control (FCS-MPC) increases rapidly with the number of MMC submodules. Meanwhile, conventional linear and nonlin…

Symmetry breaking-induced resonances with more efficient terahertz reflections Open

Jing Ma, Ya-Yun Zhang, Huan Liu, Guimin Chen, Yong Li , et al. · 2025

We report our experimental observation and theoretical and numerical validation of a new type of THz resonance and bandgap induced by symmetry breaking in a periodically corrugated parallel plate waveguide. Unlike the familiar Bragg resona…

Individually tunable multi-resonance terahertz absorbers based on 3D hybrid VO₂ metamaterials Open

Jing Ma, Huan Zhang, Wei Ji, Qiao‐Chu Zhang, Jian Sun , et al. · 2025

Individually tunable multi-resonance terahertz absorbers based on 3D hybrid VO₂ metamaterials Open

Jing Ma, Huan Zhang, Wei Ji, Qiao‐Chu Zhang, Jian Sun , et al. · 2025

Terahertz narrow-band filter based on 3D-printed periodic waveguides Open

Xiang‐Yu Wang, Huan Liu, Jing Ma, Jie Li, Wen Chen , et al. · 2024

Terahertz (THz) devices, especially waveguide-type functional devices related to transmission and control, are severely scarce due to the lack of effective design and fabrication methods. Here, we experimentally demonstrate a waveguide typ…

Localization of Transverse and Longitudinal Modes in Corrugated Terahertz Waveguides with a Microcavity Open

Ya-Yun Zhang, Jing Ma, Huan Liu, Ya-Xian Fan, Zhi-Yong Tao · 2024

High-order mode interface states of surface water waves based on non-Bragg resonances Open

Yue Gao, Linge Wang, Liu-Wei Qian, Ya-Xian Fan, Zhi-Yong Tao · 2023

In this paper, we connect two periodic channels with bandgaps of different physical properties to form a heterojunction of surface water waves, which realize a high-order mode water wave interface state and concentrate the water wave energ…

Active control of terahertz waves based on hybrid VO2 periodic corrugated waveguides Open

Huan Liu, Wen Chen, Jing Ma, Shiyang Zhang, Hailing He , et al. · 2023

We describe a method for the active control of terahertz (THz) waves using hybrid vanadium dioxide (VO 2 ) periodic corrugated waveguide. Unlike liquid crystals, graphene and semiconductors and other active materials, VO 2 exhibits a uniqu…

Highly-stable optical injection wavelength locking of Er-doped random fiber lasers Open

Hai-Yue Pang, Zhaoyun Li, Jia-Teng Zheng, Cheng Yuan, Yukun Zhang , et al. · 2023

A highly-stable and effective Er-doped random fiber laser (RFL) is proposed and experimentally demonstrated based on external optical injection locking technology. By adjusting the optical injected wavelength, the lasing wavelength can be …

A Dual Wavelength Erbium-Doped Random Fiber Laser with Tunable Wavelength Separation Open

Haiyue Pang, JiaTeng Zheng, ZhaoYun Li, Huan Liu, Zhi-Yong Tao , et al. · 2023

Rayleigh wave manipulation based on phase shift between two periodic surface corrugations Open

Qiao-Mu Zhang, Le Song, Rui Ban, Ri-Feng Zhang, Ya-Xian Fan , et al. · 2022

The propagation of Rayleigh waves along solid surfaces has attracted great attention due to its ubiquity in seismic waves, non-destructive evaluation, acoustic surface wave devices, and so on. Moreover, Rayleigh waves in periodic structure…

An Electrically Tunable Terahertz Filter Based on Liquid-Crystal-Filled Slits with Wall Corrugations Open

Shiyang Zhang, Jing Ma, Hai-Ling He, Chengguo Tong, Huan Liu , et al. · 2022

We propose a type of hollow planar waveguide with corrugated walls, which can realize electrically tunable terahertz (THz) filtering by filling the slit with liquid crystals. When the THz signals propagate in a planar waveguide with period…

Terahertz Resonances of Transverse Standing Waves in a Corrugated Plate Waveguide Open

Jing Ma, Huan Liu, Shiyang Zhang, Wenli Zou, Ya-Xian Fan , et al. · 2022

Terahertz (THz) propagation in periodic structures has attracted great attention because of its captivating electrical and optical properties. However, the created THz band gaps are usually considered to be caused by Bragg resonances. Here…

Security Enhancement of Quantum Noise Stream Cipher System Based on Optical Temporal Scrambling Open

ZhaoYun Li, Yukun Zhang, Haiyue Pang, Qingsong Luo, Xin Zhang , et al. · 2022

Time Scrambling and Decoy-State Quantum Key Distribution for Optical Physical Layer Encryption Open

ZhaoYun Li, Haiyue Pang, Qingsong Luo, Yukun Zhang, Xin Zhang , et al. · 2022

Temperature tuning of defect state induced by the periodic cavities between the phononic crystals Open

Huan Liu, Ting Liu, Le Song, Qiao-Mu Zhang, Ya-Xian Fan , et al. · 2021

The defect state in periodic structures usually leads to a pass band in the forbidden bandgap and energy localization at the position of geometric change. In this paper, we have introduced periodic cavities into a symmetric structure compo…

Parameterization of localized states of liquid surface waves in non-Bragg structures Open

Joshua-Masinde Kundu, Ting Liu, Jia Tao, Ya-Xian Fan, Zhi-Yong Tao · 2021

Slanted-eye featured forbidden bands in a water channel with undulated sidewalls Open

Bo-Yang Ma, Jia Tao, Wen-Bei Liu, Ya-Xian Fan, Zhi-Yong Tao · 2021

Manipulation of double acoustic defect states based on connection phase mismatching Open

Huan Liu, Ting Liu, Lanlan Xu, Ya-Xian Fan, Zhi-Yong Tao · 2021

Internal Cylinder Identification Based on Different Transmission of Longitudinal and Shear Ultrasonic Waves Open

Wen-Bei Liu, Wen-Bo Yan, Huan Liu, Chengguo Tong, Ya-Xian Fan , et al. · 2021

We have built a Fizeau fiber interferometer to investigate the internal cylindrical defects in an aluminum plate based on laser ultrasonic techniques. The ultrasound is excited in the plate by a Q-switched Nd:YAG laser. When the ultrasonic…

Multiple stopbands and wavefield asymmetry of surface water waves in non-Bragg structures Open

Joshua-Masinde Kundu, Ting Liu, Jia Tao, Jiayi Zhang, Ya-Xian Fan , et al. · 2021

In this paper, we use laboratory wave tank experiments to study the effect of asymmetry and defects on the bandgaps of surface water waves and use the finite element numerical method to validate our results. We demonstrate here that breaki…

Self-catalyst β-Ga2O3 semiconductor lateral nanowire networks synthesis on the insulating substrate for deep ultraviolet photodetectors Open

Yutong Wu, Shuanglong Feng, Miaomiao Zhang, Shuai Kang, Kun Zhang , et al. · 2021

Monoclinic gallium oxide (β-Ga 2 O 3 ) is a super-wide bandgap semiconductor with excellent chemical and thermal stability, which is an ideal candidate for detecting deep ultraviolet (DUV) radiation (wavelength from 200 nm to 280 nm).

Localization of water surface waves in a heterostructure channel with corrugated sidewalls Open

Jiayi Zhang, Ting Liu, Jia Tao, Ya-Xian Fan, Zhi-Yong Tao · 2021

This paper describes the fabrication of a water channel heterostructure by combining two types of periodic sidewalls with different duty ratios. This enables the manipulation and localization of water surface waves in bands that are tradit…

Manipulation of acoustic localizations based on defect mode coupling in a corrugated waveguide Open

Ting Liu, Lanlan Xu, Huan Liu, Ya-Xian Fan, Zhi-Yong Tao · 2020

Defects in periodic structures can always result in localization of various waves, such as Anderson localization, line defect photonic crystal waveguides, and locally resonant sonic metamaterials. Due to the unique physical properties of l…

Terahertz Displacement Sensing Based on Interface States of Hetero-Structures Open

Lanlan Xu, Ya-Xian Fan, Huan Liu, Tao Zhang, Zhi-Yong Tao · 2020

Herein, we propose a nano displacement sensor based on the interface state of a terahertz hetero-structure waveguide. The waveguide consists of two periodically corrugated metallic tubes with different duty ratios, which can result in simi…

Terahertz Thermal Sensing by Using a Defect-Containing Periodically Corrugated Gold Waveguide Open

Jiu-Ling Xue, Lanlan Xu, Tiantian Wang, Ya-Xian Fan, Zhi-Yong Tao · 2020

A terahertz (THz) thermal sensor has been developed by using a periodically corrugated gold waveguide. A defect was positioned in the middle of this waveguide. The periodicities of waveguides can result in Bragg and non-Bragg gaps with ide…

Active Switching of Extremely High-Q Fano Resonances Using Vanadium Oxide-Implanted Terahertz Metamaterials Open

Jing Ma, Zhihang Wang, Huan Liu, Ya-Xian Fan, Zhi-Yong Tao · 2020

In this paper, we demonstrate an active switching of extremely high Q-factor Fano resonances using vanadium oxide (VO2)-implanted THz asymmetric double C-shaped metamaterial (MM) structures. The simulation results indicate the highly tempe…

A High-Resolution Terahertz Electric Field Sensor Using a Corrugated Liquid Crystal Waveguide Open

Lanlan Xu, Yi Gong, Ya-Xian Fan, Zhi-Yong Tao · 2019

Liquid crystals (LCs) can always reflect variable optical properties in a broad terahertz (THz) band under external electric or magnetic fields. Based on the measurements of these varying properties, we can realize electric and magnetic fi…

Vanadium dioxide-assisted broadband tunable terahertz metamaterial absorber Open

Huan Liu, Zhihang Wang, Lin Li, Ya-Xian Fan, Zhi-Yong Tao · 2019

Tunable terahertz (THz) functional devices have exhibited superior performances due to the use of active materials, such as liquid crystals, graphene, and semiconductors. However, the tunable range of constitutive parameters of materials i…

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