Articles
Open Access
2021-06-20
Vol. 8 No. 2 (2021): Volume 08 Issue 2
Pages 40-46
Islanded AC microgrids operate without the support of a main grid, requiring robust voltage and frequency regulation to maintain stability and reliability. This research introduces a distributed secondary control framework employing a fixed-time observer for accurate voltage...
Authors:
Dr. Alejandro Vargas López, Ing. Mariana Torres Delgado (Author)
Islanded AC microgrid
Distributed secondary control
Fixed-time observer
Voltage stability
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188
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Articles
Open Access
2021-07-22
Vol. 8 No. 2 (2021): Volume 08 Issue 2
Pages 47-54
The rapid proliferation of smart devices, Internet of Things (IoT) applications, and high-bandwidth multimedia services has imposed unprecedented demands on cellular networks, necessitating the evolution toward next-generation 5G architectures. While 5G networks promise...
Authors:
Dr. Nguyen Van Hieu, Dr. Le Thi Mai (Author)
5G networks
energy efficiency
multi-5G small cells
millimeter-wave
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210
129
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129
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Articles
Open Access
2021-08-24
Vol. 8 No. 2 (2021): Volume 08 Issue 2
Pages 55-63
The classification of orthodontic images plays a pivotal role in clinical diagnosis, treatment planning, and automated orthodontic assessment. This research proposes an optimized feature extraction framework coupled with multi-class modeling to enhance classification accuracy...
Authors:
Dr. Haruto Tanaka, Prof. Aiko Nakamura (Author)
Orthodontic image classification
feature extraction
multi-class modeling
machine learning
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203
61
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61
264
Articles
Open Access
2021-09-26
Vol. 8 No. 2 (2021): Volume 08 Issue 2
Pages 67-75
Dynamic spectrum sharing in mobile cognitive radio networks (CRNs) presents critical challenges in efficient resource utilization, particularly under imperfect channel knowledge and heterogeneous network conditions. This research proposes an optimized information quantization...
Authors:
Dr. Aria Mohammadi, Dr. Neda Karimi (Author)
Cognitive radio networks
dynamic spectrum sharing
adaptive quantization
cooperative spectrum sensing
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204
70
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70
274
Articles
Open Access
2021-10-28
Vol. 8 No. 2 (2021): Volume 08 Issue 2
Pages 76-83
The increasing integration of renewable energy sources and the dynamic nature of modern electrical grids have intensified the need for efficient reactive power compensation and voltage stability mechanisms. Static Synchronous Compensators (STATCOMs), as flexible AC...
Authors:
Dr. Wei Zhang (Author)
STATCOM
Reactive Power Compensation
Real-Time Simulation
Voltage Stability
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241
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Articles
Open Access
2021-11-30
Vol. 8 No. 2 (2021): Volume 08 Issue 2
Pages 84-93
This research presents a comprehensive evaluation of Direct Power Control (DPC) strategies for three-phase AC-DC converters under unbalanced voltage supply, focusing on both steady-state performance and dynamic response. Voltage unbalance in power grids introduces...
Authors:
Dr. Kwame Mensah, Prof. Ama Boateng (Author)
Direct Power Control
AC-DC Converter
Voltage Unbalance
Steady-State Analysis
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278
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