A5049987436- Radio Frequency Integrated Circuit Design
- Microwave Engineering and Waveguides
- GaN-based semiconductor devices and materials
- Semiconductor Quantum Structures and Devices
- Advanced Power Amplifier Design
- Theoretical and Computational Physics
- Electrocatalysts for Energy Conversion
- Botulinum Toxin and Related Neurological Disorders
- Fuel Cells and Related Materials
- Drilling and Well Engineering
- Electromagnetic Compatibility and Noise Suppression
- Advanced NMR Techniques and Applications
- Oil and Gas Production Techniques
- Silicon Carbide Semiconductor Technologies
- Hybrid Renewable Energy Systems
- Facial Rejuvenation and Surgery Techniques
- Electric Vehicles and Infrastructure
- Hydraulic Fracturing and Reservoir Analysis
- Advanced DC-DC Converters
- Advanced Combinatorial Mathematics
- Smart Grid and Power Systems
- 3D IC and TSV technologies
- Dermatologic Treatments and Research
- Advancements in Semiconductor Devices and Circuit Design
- Facial Nerve Paralysis Treatment and Research
City University of Hong Kong
2024-2025
Kunming University of Science and Technology
2024-2025
Nanyang Technological University
2020-2024
National University of Singapore
2005-2024
Suzhou Research Institute
2024
University of Science and Technology of China
1986-2024
Chengdu University
2024
Xinxiang University
2024
Yangzhou University
2024
Collaborative Innovation Center of Chemistry for Energy Materials
2022
The bulk magnetic susceptibility (BMS) shift of a nuclear resonance frequency caused by paramagnetic compound is importance in vivo NMR, both spectroscopy and imaging. However, since it rather complicated phenomenon, has been the source many misinterpretations literature. We have reworked organized theory BMS shift. This includes accounting for important effects local susceptibility. conducted experiments on phantom samples order to illustrate principles involved. Our phantoms consist...
This brief presents a 2.0~42.0 GHz ultra-wide bandwidth Cascode distributed low-noise amplifier (CDLNA) MMIC design. With the proposed coupled-line (CL) sections between each drain-artificial transmission line (D-ATML) node and related gate-artificial (G-ATML) node, traveling signal is reused to enhance gain broaden operation simultaneously. To improve further, inductive peaking has also been employed at drain of common-source (CS) common-gate (CG) transistors. Meanwhile, an active...
In this paper, a 2-stage compact wideband low-noise amplifier (LNA) monolithic microwave integrated circuit (MMIC) with multiple resistive feedback (MRFB) is presented. From the DC point of view, proposed MRFB functions as self-biasing structure to bias transistors in optimal condition, improving noise figure (NF) and linearity. Meanwhile, by employing source degeneration input inductor, LNA achieves flat gain at AC side. comparison traditional topologies, wide bandwidth more than 11.5 GHz...
This article presents a 3-stage millimeter-wave low-noise amplifier (LNA) monolithic microwave integrated circuit (MMIC) design for broadband applications. The proposed structure consists of cascading common-source (CS) LNA with coupled interstage feedback (CIF) paths at the second and third stages. By tuning coupling factor inductance CIF, enhanced overall gain extended working bandwidth can be achieved simultaneously. CIF formed by simple on-chip edge-coupled parallel metal-lines features...
The β-1,3-glucan synthase gene 2 (gls2) from the biosynthetic pathway of polysaccharides was cloned and overexpressed in G. lingzhi. content intracellular gls2 overexpression strain 22.96 mg/100 mg dry weight, 20% higher than that wild-type (WT) strain. effect co-overexpression gls2, UDP-glucose pyrophosphorylase (ugp), gls on polysaccharide biosynthesis also investigated production extracellular (EPS) G2-U-G transformants 62% WT Moreover, EPS had a molecular weight glucose levels (6.3 × 103...
Neural network-based capacitance models are accurate, but some of them not charge-conservative. In this work, a novel consistent gate charge model for GaN high electron mobility transistors is presented based on neural networks. The equivalent circuit parameters extracted using the multiobjective gray wolf optimizer-based hybrid method, which improves accuracy parameter extraction. To obtain more reliable data sets accurate modeling, outliers in intrinsic capacitances automatically detected...
Quantity production of low-cost and high-performance proton exchange membranes (PEMs) used in hydrogen fuel cells is the centerpiece step toward future. Herein, we developed a facile synthesis approach for this task. The prepared PEM breaks through unfavorable trade-off between thermal-dimensional stability conductivity due to adequately designed hierarchical polymer structure composed flexible ionic side-chains anchored onto twisted rigid backbone. Microscale topology analyses molecular...
A neural network (NN)-based hybrid physical model for gallium nitride high-electron-mobility transistors (GaN HEMTs) is proposed. In this model, the artificial NN (ANN) used to construct terminal charge densities, which linked with device model's RF and dc performance using MIT Virtual Source (MVS) theory. detailed parameter extraction optimization method proposed as well. The starts from S-parameters consideration of access region resistances. particle swarm (PSO) optimize results. After...
Potassium-ion batteries (PIBs) have been widely studied owing to the abundant reserves, widespread distribution, and easy extraction of potassium (K) resources. Molybdenum disulfide (MoS2) has received a great deal attention as key anode material for PIBs its two-dimensional diffusion channels K+ ions. However, due poor electronic conductivity huge influence embedded ions (with large ionic radius 3.6 Å) on MoS2 layer, anodes exhibit rate performance easily collapsed structure. To address...
In this letter, a 10–43-GHz low-noise amplifier (LNA) monolithic microwave integrated circuit (MMIC) is designed in commercial 0.15- <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\mu \text{m}$ </tex-math></inline-formula> GaAs E-mode pseudomorphic high electron mobility transistor (pHEMT) technology. the proposed LNA circuit, novel coupled-line (CL)-based positive feedback structure employed with...
In this brief, a new systematic approach of matching network (MN) layout synthesis and optimization for power amplifiers (PAs) is proposed based on implicit space mapping (ISM). Commonly, the performance discrepancy between schematic initial huge, especially millimeter wave (mmWave) PAs. To address issue, modified ISM can shift work to circuit simulations by calibrating carefully-selected auxiliary parameters in EM data. validate method, an eligible dual-band inter-stage MN rapidly optimized...
In this brief, a novel design approach for monolithic microwave integrated circuit (MMIC) power amplifiers (PAs) using improved implicit space mapping (IISM) and transistor modeling is proposed. By utilizing partial parameters of the matching networks models as auxiliary parameter extraction, proposed method effectively resolves issue significant performance discrepancy between ideal schematics initial layouts; greatly reduces time consumption layout recovery optimizations; leads to...
Bipolar membrane electrolyzers present an attractive scenario for concurrently optimizing the pH environment required paired electrode reactions. However, practicalization of bipolar membranes water electrolysis has been hindered by their sluggish dissociation kinetics, poor mass transport, and insufficient interface durability. This study starts with numerical simulations discloses limiting factors monopolar layer engineering. On this foundation, we tailor flexible (10 ∼ 40 µm) comprising...
We here demonstrate a monographic study to investigate the effects of cis–trans conformation on properties anion exchange ionomers for first time. Twisted cis-conformation possessed abundant subnanoscale free volume cavities facilitates oxygen permeability and water adsorption. Moreover, its nonplanar can alleviate undesirable absorption ionomer Pt Pt–Ru surfaces, thus improving electrochemical performance catalyst layers. Theoretical investigations are mutual corroborations, demonstrating...
Obtaining accurate ultrasonically estimated displacements along both axial (parallel to the acoustic beam) and lateral (perpendicular directions is an important task for various clinical elastography applications (e.g., modulus reconstruction temperature imaging). In this study, a partial differential equation (PDE)–based regularization algorithm was proposed enhance motion tracking accuracy. More specifically, PDE-based algorithm, utilizing two-dimensional (2D) displacement estimates from...
Dissolved gas analysis (DGA) is the most important tool for fault diagnosis in electric power transformers. To improve accuracy of diagnosis, this paper proposed a new model (SDAE-LSTM) to identify dissolved gases insulating oil transformers and perform parameter analysis. The performance evaluation attained by case studies terms recognition accuracy, precision ratio, recall ratio. Experiment results show that SDAE-LSTM performs better than other models under different input conditions. As...
In this paper, the design and performance of a three-stage Ka-Band balanced high power amplifier (HPA) MMIC are presented. The proposed HPA utilizes 150-nm GaN-SiC HEMT process self-developed empirical model. By incorporating wideband matching networks Lange couplers, large saturated output power, gain, good conditions realized simultaneously. Simulated in continuous-wave (CW) operation, enjoys 20 dB gain covering 3-dB bandwidth 32~36 GHz with better than -8 impedance matching. For...
The number of electric vehicles (EVs) is expected to grow significantly, which calls for effective planning charging infrastructures. While the infrastructure relies on an accurate demands, behaviours EVs are not always predictable and can be sensitive many uncertain future environmental factors. Considering such uncertainties, this study aims robustly optimally determine chargers main switch board (MSB) capacities without violating queuing time constraints load flow constraints....
In this paper, the design and analysis of a 2.0 to 18.0 GHz distributed high-power amplifier (DHPA) monolithic microwave integrated circuit (MMIC) on 150-nm GaN-SiC HEMT process has been presented. By employing 8-cell 2-level-stacked architecture, ultra-wide bandwidth good power performance are achieved simultaneously. To improve PAE gain further, non-uniform distribution, tapering drain-artificial transmission line (D-ATMLs), inductive peaking structures also incorporated. The proposed HPA...
This paper reports on a Ku-band high-power amplifier (HPA) monolithic microwave integrated circuit (MMIC) 150-nm GaN-SiC high electron mobility transistor (HEMT) process, which exhibits output power (13 W Psat) and efficiency (45 % peak PAE) under pulse simulation with 100 <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mu\mathrm{s}$</tex> period 10 duty cycle. By employing wideband matching networks (MNs), the proposed HPA achieves 39.2 '"...
The global clean energy transition and carbon neutrality call for developing high‐performance new batteries. Here we report a rechargeable lithium metal ‐ catalytic hydrogen gas (Li‐H) hybrid battery utilizing two of the lightest elements, Li H. Li‐H operates through redox H2/H+ on cathode Li/Li+ anode. universal properties H2 enable to demonstrate attractive electrochemical performance, including high theoretical specific up 2632 Wh kg‐1, discharge voltage 3 V, round‐trip efficiency 99.7%,...