Zhonggen Wang

An optically transparent fractal-inspired monopole antenna for Bluetooth/ISM band and 5G Sub-6 GHz applications

Han Lin, Zhengting Zhang, Zhonggen Wang, Xiaoyan Wei

Abstract This paper presents an optically transparent coplanar waveguide (CPW)-fed fractal-inspired monopole antenna for Bluetooth/industrial, scientific, and medical (ISM) band and 5 G Sub-6 GHz applications. The proposed antenna employs a ring-based iterative fractal-inspired radiator fabricated on a laminated polymethyl methacrylate (PMMA)-polyethylene …

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A dual-band 8 × 8 MIMO antenna system consisting of self-decoupled antenna pairs with high isolation

Han Lin, Wenjie Sun, Zhonggen Wang, Wenyan Nie et autres

A novel self-decoupling dual-band 8 × 8 multiple-input multiple-output (MIMO) antenna system is proposed for 5G mobile terminals.Each antenna pair employs M-shaped dual feeding lines for coupled excitation, feeding a hybrid radiating structure integrating an H-shaped primary radiator and a T-shaped additional …

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Reform of the Grassroots Emergency Management System from the Perspective of Collaborative Governance

Jing Chen, Kedi Wang, Siquan Yang, Hongyong Yuan et autres

China is one of the countries most severely affected by natural disasters, which are characterized by diverse types, wide distribution, and high frequency. As the cornerstone and first line of defense of the emergency management system, grassroots emergency management plays a decisive …

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A Five‐Notch Ultra‐Wideband Flexible Antenna for Wearable Applications

Zhonggen Wang, Guoxiang Song, Wenyan Nie

ABSTRACT In this paper, an ultra‐wideband (UWB) notch antenna for wearable applications is proposed, and the operating frequency of the antenna is 3.04 to 14.4 GHz. On the basis of the monopole UWB antenna, five notch bands from 3.87 to 4.27 GHz, …

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A Hybrid Strategy for EMI Suppression in IPMSM Drives: Integrating Active Common-Filter with Harmonic Suppression Reaching Law

Han Lin, Weiran Zheng, Zhonggen Wang, Wenyan Nie

A Miniaturized Circularly Polarized Antenna with Embedded Metasurface Patches

Xu Tan, Han Lin, Zhonggen Wang, Wenyan Nie

Adaptive Rational Krylov Method With Domain Decomposition for Efficient Electromagnetic Field Analysis

Jianhao Xiang, Zhonggen Wang, Yufa Sun, Wenyan Nie

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Wideband Low-Profile Circularly Polarized Crossed-Dipole Antenna Based on AMC Reflector

He Liu, Han Lin, Zhonggen Wang, Wenyan Nie

Reconstruction of the July 12, 2022, flash flood event in Southwest China: integrating emergency management analysis with hydrological modeling

Xiaoran Fu, Zhonggen Wang, Hongquan Sun, Shanzhong Qi et autres

A devastating flash flood hit southwestern China on July 12, 2022, causing 18 fatalities in the Heishui River watershed of Pingwu County, Sichuan Province. Because global climate change and various human activities exacerbate flash flood damage, it is important to apply lessons …

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Sensorless control of permanent magnet synchronous motors based on composite nonlinear functions and ESO-PLLs

Mingzhi Yu, Zhonggen Wang

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Automated Detection of Embankment Piping and Leakage Hazards Using UAV Visible Light Imagery: A Frequency-Enhanced Deep Learning Approach for Flood Risk Prevention

Zhonggen Wang, Renzhi Li, Ruxin Zhao

Embankment piping and leakage are primary causes of flood control infrastructure failure, accounting for more than 90% of embankment failures worldwide and posing significant threats to public safety and economic stability. Current manual inspection methods are labor-intensive, hazardous, and inadequate for emergency …

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An Automated Framework for Abnormal Target Segmentation in Levee Scenarios Using Fusion of UAV-Based Infrared and Visible Imagery

Jiyuan Zhang, Zhonggen Wang, Jing Chen, Fei Wang et autres

Levees are critical for flood defence, but their integrity is threatened by hazards such as piping and seepage, especially during high-water-level periods. Traditional manual inspections for these hazards and associated emergency response elements, such as personnel and assets, are inefficient and often …

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