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Solid-state transformer-based new traction drive system and control

Jianghua FENG, Jing SHANG, Zhixue ZHANG, Huadong LIU, Zihao HUANG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 3, Pages 411-426 doi: 10.1007/s11465-018-0467-0

Abstract: efficiency and grid-side power quality, an efficient SSTT optimized topology combining high-voltage cascadedcarrier-interleaving phase shift modulation strategy is proposed to improve the harmonic performance of cascaded

Keywords： solid-state traction transformer high-voltage cascaded rectifier LLC resonant converter synchronous rotating

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On 3Dface reconstruction via cascaded regression in shape space Article

Feng LIU, Dan ZENG, Jing LI, Qi-jun ZHAO

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 12, Pages 1978-1990 doi: 10.1631/FITEE.1700253

Abstract: Cascaded regression has been recently applied to reconstruct 3D faces from single 2D images directlyWe investigate thoroughly such cascaded regression based 3D face reconstruction approaches from fourTo answer these questions, a simplified cascaded regression based 3D face reconstruction method is devisedThe results not only deepen the understanding of cascaded regression based 3D face reconstruction approaches

Keywords： 3D face reconstruction Cascaded regressor Shape space Real-time

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A fast face detection algorithm using enhanced AdaBoostbased on walsh features

Guo Zhibo,Yang Jingyu,Liu Huajun,Yan Yunyang

Strategic Study of CAE 2008, Volume 10, Issue 7, Pages 125-131

Abstract: is developed, where double threshold makes training process faster ; and in the process of training cascadeddetector, the next classifier can be guided by the former classifier,which enhances the performance of the cascaded

Keywords： Walsh features enhanced AdaBoost cascaded detector face detection

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High Performance Electrically Small Huygens Rectennas Enable Wirelessly Powered Internet of Things Sensing Applications: A Review Review

Wei Lin, Richard W. Ziolkowski

Engineering 2022, Volume 11, Issue 4, Pages 42-59 doi: 10.1016/j.eng.2021.08.025

Abstract:

Far-field wireless power transfer (WPT) is a major breakthrough technology that will enable the many anticipated ubiquitous Internet of Things (IoT) applications associated with fifth generation (5G), sixth generation (6G), and beyond wireless ecosystems. Rectennas, which are the combination of rectifying circuits and antennas, are the most critical components in far-field WPT systems. However, compact application devices require even smaller integrated rectennas that simultaneously have large electromagnetic wave capture capabilities, high alternating current (AC)-to-direct current (DC) (AC-to-DC) conversion efficiencies, and facilitate a multifunctional wireless performance. This paper reviews various rectenna miniaturization techniques such as meandered planar inverted-F antenna (PIFA) rectennas; miniaturized monopole- and dipole-based rectennas; fractal loop and patch rectennas; dielectric-loaded rectennas; and electrically small near-field resonant parasitic rectennas. Their performance characteristics are summarized and then compared with our previously developed electrically small Huygens rectennas that are proven to be more suitable for IoT applications. They have been tailored, for example, to achieve battery-free IoT sensors as is demonstrated in this paper. Battery-free, wirelessly powered devices are smaller and lighter in weight in comparison to battery-powered devices. Moreover, they are environmentally friendly and, hence, have a significant societal benefit. A series of high-performance electrically small Huygens rectennas are presented including Huygens linearly-polarized (HLP) and circularly-polarized (HCP) rectennas; wirelessly powered IoT sensors based on these designs; and a dual-functional HLP rectenna and antenna system. Finally, two linear uniform HLP rectenna array systems are considered for significantly larger wireless power capture. Example arrays illustrate how they can be integrated advantageously with DC or radio frequency (RF) power-combining schemes for practical IoT applications.

Keywords： Cardioid pattern Electrically small antenna Huygens dipole antenna Internet of Things (IoT) Rectenna Rectifier

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Analysis and design of pulse frequency modulation dielectric barrier discharge for low power applications

Tang-tang GUO,Xing-liang LIU,Shi-qiang HAO,Chi ZHANG,Xiang-ning HE

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 3, Pages 249-258 doi: 10.1631/FITEE.1400185

Abstract: The rectifier-compensated first harmonic approximation (RCFHA) is applied to linearize the equivalent

Keywords： Dielectric barrier discharge Rectifier-compensated first harmonic approximation Parasitic capacitance

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Sensorless direct torque control for salient-pole PMSM based on extended Kalman filter fed by AC/DC/AC converter

F. BENCHABANE, A. TITAOUINE, O. BENNIS, K. YAHIA, D. TAIBI, A. GUETTAF

Frontiers in Energy 2012, Volume 6, Issue 3, Pages 247-254 doi: 10.1007/s11708-012-0190-1

Abstract: In this paper, a new sensorless interior permanent magnet synchronous motor (IPMSM) drives method with extended Kalman filter (EKF) for speed, rotor position and load torque estimation is proposed. The direct torque control (DTC) technique for permanent magnet synchronous motor (PMSM) is receiving increasing attention due to the important advantages of the low dependence on motor parameters when compared with other motor control techniques. The Kalman filter is an observer for linear and non-linear systems and is based on the stochastic intromission, in others words, noise. The PMSM is fed by an indirect power electronic converter which is controlled by a sliding mode technique. The simulation tests performed for different operating conditions have confirmed the robustness of the overall system; and it is shown that the sliding mode technique has successfully minimized the different harmonics introduced by the line converter.

Keywords： DTC) sensorless control extended Kalman filter (EKF) permanent magnet synchronous motor (PMSM) boost-rectifier

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Direct field oriented control scheme for space vector modulated AC/DC/AC converter fed induction motor

F. BENCHABANE, A. TITAOUINE, O. BENNIS, K. YAHIA, D. TAIBI

Frontiers in Energy 2012, Volume 6, Issue 2, Pages 129-137 doi: 10.1007/s11708-012-0183-0

Abstract: This paper investigates a Luenberger flux observer with speed adaptation for a direct field oriented control of an induction motor. An improved method of speed estimation that operates on the principle of speed adaptive flux and current observer has been proposed. An observer is basically an estimator that uses a plant model and a feedback loop with measured stator voltage and current. Simulation results show that the proposed direct field oriented control with the proposed observer provides good performance dynamic characteristics. The induction motor is fed by an indirect power electronics converter. This indirect converter is controlled by a sliding mode technique that enables minimization of harmonics introduced by the line converter, as well as the control of the power factor and DC-link voltage. The robustness of the overall system is studied using simulation for different operating modes and varied parameters.

Keywords： oriented control Luenberger observer estimation space vector modulation (SVM) sliding mode control boost-rectifier