Searched for: author%3A%22Xu%2C+J.%22
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Xu, J. (author)
journal article 2009
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Xu, J. (author)
journal article 2010
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Xu, J. (author), Yazicioglu, Refet Firat (author), Grundlehner, Bernard (author), Harpe, Pieter (author), Makinwa, K.A.A. (author), Van Hoof, Chris (author)
This paper presents an active electrode system for gel-free biopotential EEG signal acquisition. The system consists of front-end chopper amplifiers and a back-end common-mode feedback (CMFB) circuit. The front-end AC-coupled chopper amplifier employs input impedance boosting and digitally-assisted<br/>offset trimming. The former increases the...
journal article 2011
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Xu, J (author), Mitra, S (author), Matsumoto, A (author), Patki, S (author), van Hoof, C (author), Makinwa, K.A.A. (author)
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journal article 2014
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Xu, J. (author), Büsze, Benjamin (author), Van Hoof, Chris (author), Makinwa, K.A.A. (author), Yazicioglu, Refet Firat (author)
This paper presents a digital active electrode (DAE) system for multi-parameter biopotential signal acquisition in portable and wearable devices. It is built around an IC that performs analog signal processing and digitization with the help<br/>of on-chip instrumentation amplifiers, a 12 bit ADC and a digital interface. Via a standard bus, up to...
journal article 2015
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Xu, J. (author), Broekens, D.J. (author), Hindriks, K.V. (author), Neerincx, M.A. (author)
The aim of our work is to design bodily mood expressions of humanoid robots for interactive settings that can be recognized by users and have (positive) effects on people who interact with the robots. To this end, we develop a parameterized behavior model for humanoid robots to express mood through body language. Different settings of the...
journal article 2015
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Xu, J. (author), Mitra, Srinjoy (author), Van Hoof, Chris (author), Yazicioglu, Refet Firat (author), Makinwa, K.A.A. (author)
Active electrodes (AEs), i.e., electrodes with built-in readout circuitry, are increasingly being implemented in wearable healthcare and lifestyle applications due to AEs' robustness to environmental interference. An AE locally amplifies and buffers μV-level EEG signals before driving any cabling. The low output impedance of an AE mitigates...
journal article 2017
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Hou, T. (author), Xu, J. (author), Elkhuizen, W.S. (author), Wang, C.C. (author), Jiang, Jiehui (author), Geraedts, Jo M.P. (author), Song, Y. (author)
2D coil design limits the use of wireless power transfer (WPT) in many products with freeform outer shapes. In this paper, enabled by 3D printed electronics, we propose a systematic approach to design and fabricate 3D coils for WPT. Based on the circular spiral and rectangular spiral patterns, 3D receiver and transmitter coils can be...
journal article 2019
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De Schutter, B.H.K. (author), van den Boom, A.J.J. (author), Xu, J. (author), Safaei Farahani, S. (author)
The objective of this paper is to provide a concise introduction to the max-plus algebra and to max-plus linear discrete-event systems. We present the basic concepts of the max-plus algebra and explain how it can be used to model a specific class of discrete-event systems with synchronization but no concurrency. Such systems are called max...
journal article 2020
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Xu, J. (author), Yang, Gongliu (author), Sun, Yiding (author), Picek, S. (author)
The current navigation systems used in many autonomous mobile robotic applications, like unmanned vehicles, are always equipped with various sensors to get accurate navigation results. The key point is to fuse the information from different sensors efficiently. However, different sensors provide asynchronous measurements, some of which even...
journal article 2021
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Xu, J. (author), Soeiro, Thiago B. (author), Gao, Fei (author), Tang, Houjun (author), Bauer, P. (author)
Three-legs active power decoupling (APD) converters are widely studied in the single-phase grid-connected systems to enhance the circuit lifetime by creating an alternative path for the typical existing dc-side power pulsating ripple. Therefore, this reduces the requirement of smoothing dc capacitors allowing compact designs even with the...
journal article 2021
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Yang, Y. (author), Xu, J. (author), Elkhuizen, W.S. (author), Song, Y. (author)
Acquiring an accurate 3D scan of the human hand is a challenging task, mainly due to the complicated geometry and the instability of the hand. In this paper, we present a low-cost photogrammetry-based scanner that is designed for scanning the human hand. The scanner has fifty modules, each has a Raspberry Pi with an 8-megapixels camera. They...
journal article 2021
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Yibole, H. (author), Lingling-Bao, B. (author), Xu, J. (author), Alata, H. (author), Tegus, O. (author), Hanggai, W. (author), van Dijk, N.H. (author), Brück, E.H. (author), Guillou, F. (author)
While rare-earth magnets exhibit unchallenged hard-magnetic properties, looking for alternatives based on inexpensive elements of non-critical supply remains of utmost interest. Here, we demonstrate that (Fe,Co)<sub>2</sub>(P,Si) single crystals combine a large magnetocrystalline anisotropy (K<sub>1</sub> ≈ 0.9 MJ m<sup>−3</sup> at 300 K),...
journal article 2021
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Xu, J. (author), Soeiro, Thiago B. (author), Wang, Yong (author), Gao, Fei (author), Tang, Houjun (author), Bauer, P. (author)
Two-stage AC-DC converters are considered as a prominent solution for DC-type electric vehicle (EV) chargers. However, this kind of architecture suffers from high switching losses with large heatsink and DC-link capacitor volume. To relieve this issue, this paper presents a new hybrid modulation for DC-type EV chargers, where a two-phase...
journal article 2022
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Wu, Y. (author), Xu, J. (author), Soeiro, Thiago B. (author), Stecca, M. (author), Bauer, P. (author)
Variable switching frequency PWM (VSFPWM) modulation can be advantageously implemented in industrial applications, such as renewable energy, motor drives, and uninterrupted power supply (UPS) systems, to reduce the injected current harmonic amplitudes, to suppress audible noise, and to improve semiconductor power efficiency. In this article,...
journal article 2022
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Stecca, M. (author), Tan, Changyu (author), Xu, J. (author), Soeiro, Thiago B. (author), Bauer, P. (author), Palensky, P. (author)
In this article, a hybrid Si/Si carbide (SiC) switch (HyS) modulation with minimum SiC MOSFET conduction (mcHyS) is experimentally characterized, so as to derive its conduction and switching performance. These are later used to derive a silicon (Si) area analytical model for the HyS configuration. The chip area model is used to benchmark the...
journal article 2022
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Xu, J. (author), Soeiro, Thiago B. (author), Wu, Y. (author), Gao, Fei (author), Wang, Y. (author), Tang, Houjun (author), Bauer, P. (author)
A three-phase buck-type rectifier features a step-down ac-dc conversion function, which is considered as a prominent solution for electric vehicle chargers and telecommunication systems integrated to the grid above 380 V line to line. However, traditional solutions for those applications employ cascaded architectures with an ac-dc boost-type...
journal article 2022
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Xu, J. (author), Doubrovski, E.L. (author), Geraedts, Jo M.P. (author), Song, Y. (author)
The geometric shapes and the relative position of coils influence the performance of a three-dimensional (3D) inductive power transfer system. In this paper, we propose a coil design method for specifying the positions and the 3D shapes of a pair of coils to transmit the desired power. Given region of interests (ROIs) for designing the...
journal article 2022
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Zhu, G. (author), Dong, J. (author), Shi, W. (author), Soeiro, Thiago B. (author), Xu, J. (author), Bauer, P. (author)
This article proposes a mode-switching-based phase shift control (MS-PSC) for wireless power transfer (WPT) systems, which is able to achieve power regulation, load matching, and wide ZVS operations simultaneously without using additional dc-dc converters. Based on the mode transitions between the full-bridge, mixed-bridge, and half-bridge...
journal article 2022
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Bao, L. L. (author), Yibole, H. (author), Xu, J. (author), Ou, Z. Q. (author), Haschuluu, O. (author), Tegus, O. (author), van Dijk, N.H. (author), Brück, E.H. (author), Guillou, F. (author)
In view of the interest that (Fe,Co)<sub>2</sub>(P,Si) compounds have as potential permanent magnets, their structural and magnetic phase diagrams are explored focusing on establishing the range where the hexagonal Fe<sub>2</sub>P-type structure is observed. In Fe<sub>1.93-x</sub>Co<sub>x</sub>P<sub>1-y</sub>Si<sub>y</sub>, the highest Si...
journal article 2022
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