A5101730220- Silicon Carbide Semiconductor Technologies
- Advanced DC-DC Converters
- Medical Research and Treatments
- Composting and Vermicomposting Techniques
- Multilevel Inverters and Converters
- Pharmaceutical and Antibiotic Environmental Impacts
- Aluminum Alloys Composites Properties
- Advanced ceramic materials synthesis
- Advancements in Battery Materials
- HVDC Systems and Fault Protection
- Regional Development and Environment
- Electric Motor Design and Analysis
- Esophageal and GI Pathology
- Sensorless Control of Electric Motors
- Constructed Wetlands for Wastewater Treatment
- Case Reports on Hematomas
- AI in cancer detection
- Gastrointestinal Bleeding Diagnosis and Treatment
- Nematode management and characterization studies
- Electromagnetic Compatibility and Noise Suppression
- Advanced materials and composites
- COVID-19 diagnosis using AI
- Gastroesophageal reflux and treatments
- Waste Management and Recycling
- Boron and Carbon Nanomaterials Research
Zhejiang University
2009-2023
Shandong Academy of Sciences
2020
Qilu University of Technology
2020
CAE (Canada)
2007
In this article, we use the Alexnet network in deep learning to determine whether lung CT images are infected with covid-19.First of all, data preprocessing stage, original image is scaled and normalized reduce noise interference. The batch operation training set test can increase speed;Secondly, build an eight-layer model, reasonable hyperparameters for each layer network, define loss function optimizer, processed train weight parameters model.Finally, three indicators accuracy, accuracy...
Solid-state transformer (SST) based on Vienna cell features with less semiconductor devices and high-power density, providing a promising concept for super charging stations uninterruptible power supply data centers. However, the presence of numerous switching in SSTs raises possibility faults. Bypassing faulty cells not only adds to cost by requiring additional bypass switches but may also result loss system capacity. To address above problems, this article proposes fault-tolerant operation...
The medium-voltage dc (MVDC) system are intensely investigated by both industry and academy. However, how to realize a lower power circuit directly fed MVDC is an important but easily neglected problem, which seriously affects the reliability of system. current high step-down circuits mostly suitable for high-power applications, while low-power applications designed case case. To address obstacle, generalized buck-boost type converter (BHSC) structure proposed in this article. submodules...
DC power grid is considered as the future trend for distribution networks. However, pure medium-voltage direct current (MVdc) faces great challenges in designing supplies with high-voltage input but small output requirements. The continuous supply from MVdc bus typically requires converters complex circuit structures and control algorithms. This article presents a simple structure systems. proposed comprised of cascaded standardized submodules to cope reduce isolation requirement, voltage...
Following the rapid development of Medium voltage DC (MVDC) distribution system, high power medium electronic converters such as solid-state transformers are intensely investigated by both industry and academy. However, how to provide an auxiliary supply(APS) which is directly fed from MVDC become important but easily neglected problem. This heavily affects reliability system. paper proposed a buck-boost type step-down converter(BHSC) aiming address issue. The BHSC has modular structure its...
This paper deals with a maximum torque per voltage control method of the interior permanent magnet synchronous motor, which aims at high demands for convergence speed and accuracy in electric vehicles applications. First, Newton downhill is adopted solving nonlinear constraints within few iterations, guarantees iterative speed. Second, motor parameters used iteration are identified by hybrid affine projection algorithm (APA) dual sample time. In this approach, effect temperature ignored...
Based on the different requirements for IGBT thermal model from device to system level, timescales of time constants each layer package structure are used establish an device-to-system-level simulations. Simulation results verify its accuracy.