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Teng, Li (author), Liang, Junrui (author), Du, S. (author)Owing to the advancement of vibration energy harvesting technology, many motion-powered battery-free Internet of things (IoT) applications have been reported in recent years. Since the ambient energy is usually weak, these IoT devices (a) mostly operate in intermittent or burst mode. The operation of these devices heavily depends on the level of...conference paper 2022
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Liang, Yansong (author), Wang, Ruizhi (author), Chen, Zhongsheng (author), Du, S. (author)This paper presents a boost converter for thermo-electric energy harvesting with photovoltaic (PV)-assisted startup. The converter employs a new two-phase startup architecture and the PV cell is used in the first phase to provide an initial high voltage for startup. This high voltage drives the boost converter to charge a startup capacitor,...conference paper 2022
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Zou, Yiwei (author), Du, S. (author)Piezoelectric energy harvesting (PEH) has attracted much attention as an approach to exploit ambient vibrational energy to power self-sustained devices. Among the proposed interface circuits for PEH, Synchronized Switch Harvesting on Capacitor (SSHC) rectifier distinguishes itself since it achieves high power efficiency while requires no...conference paper 2022
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Wang, Zhongkai (author), Choi, Minsoo (author), Wright, John (author), Lee, Kyoungtae (author), Liu, Zhaokai (author), Yin, Bozhi (author), Han, Jaeduk (author), Du, S. (author), Alon, Elad (author)We present a ring-oscillator-based sub-sampling phase-locked loop (PLL) using a generator-based design flow. A hybrid loop with a delta-sigma ($\Delta \Sigma$) modulator is applied to reduce the loop filter (LF) area and the control ripple. The generator automatically produces the ring oscillator and PLL to meet the provided specifications. The...conference paper 2022
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Yue, X. (author), Zou, Yiwei (author), Chen, Zhelun (author), Liang, Junrui (author), Du, S. (author)Synchronized switch harvesting on inductor (SSHI) is an efficient active rectifier to extract energy generated from piezoelectric transducer in piezoelectric energy harvesting system. Unlike passive rectifiers, SSHI rectifiers require a power supply to drive synchronized switches. Unfortunately, there is no stable supply when the system starts...conference paper 2022
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Wang, Ruizhi (author), Liang, Yansong (author), Du, S. (author)An ultra-low-startup-voltage thermoelectric energy harvesting system assisted by a piezoelectric generator (PEG) is presented in this paper. When the energy harvesting system is implemented in a place where there is mechanical vibration, the associated PEG can generate a stable clock signal and drive the boost converter to start from the cold...conference paper 2022
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Zou, Yiwei (author), Yue, X. (author), Du, S. (author)A nanopower highly efficient low-dropout (LDO) regulator for energy harvesting (EH) applications is presented in this paper. The LDO is fully autonomous with a bandgap reference (BGR) featuring a novel bandgap supply-switching (SS) topology, an over-voltage protection (OVP), a under-voltage lockout (UVLO) and control block to obtain stable...conference paper 2022
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Li, G. (author), Guo, Mingxing (author), Du, Jinqing (author), Zhuang, Linzhong (author)A new non-isothermal pre-aging treatment was proposed and utilized in Al-Mg-Si-Cu-Zn alloys, together with natural aging and artificial aging. The influence of cooling rates on subsequent precipitation behaviors was investigated by experimental and thermodynamic simulations. The results show that by controlling the formation of clusters/GP...journal article 2022
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Zhao, Yan (author), Yan, Jianwei (author), Huang, Mengshi (author), Bian, Guangmeng (author), Du, Y. (author)The settlement space along China’s Grand Canal is an important part of cultural heritage, boasting high value of conservation and inheritance as a museum of local culture in an active state. The paper is aimed at revealing the current situation and satisfaction with the settlement space environment along China’s Grand Canal Tianjin Section...journal article 2022
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Du, Zhe (author), Negenborn, R.R. (author), Reppa, V. (author)This paper proposes a distributed control scheme for autonomous tugboats to tow a ship in a restricted water traffic environment ensuring collision avoidance while being compliant with maritime regulation called COLREGS. The complex problem is cooperatively solved by addressing three sub-optimization problems. The first is to optimize the...journal article 2022
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Zhou, Hengshun (author), Du, Jun (author), Zou, Gongzhen (author), Nian, Zhaoxu (author), Lee, Chin Hui (author), Siniscalchi, Sabato Marco (author), Watanabe, Shinji (author), Scharenborg, O.E. (author), Chen, Jingdong (author)In this paper, we describe and release publicly the audio-visual wake word spotting (WWS) database in the MISP2021 Challenge, which covers a range of scenarios of audio and video data collected by near-, mid-, and far-field microphone arrays, and cameras, to create a shared and publicly available database for WWS. The database and the code ...journal article 2022
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Chen, Hang (author), Du, Jun (author), Dai, Yusheng (author), Lee, Chin Hui (author), Siniscalchi, Sabato Marco (author), Watanabe, Shinji (author), Scharenborg, O.E. (author), Chen, Jingdong (author), Yin, Bao Cai (author), Pan, Jia (author)In this paper, we present the updated Audio-Visual Speech Recognition (AVSR) corpus of MISP2021 challenge, a large-scale audio-visual Chinese conversational corpus consisting of 141h audio and video data collected by far/middle/near microphones and far/middle cameras in 34 real-home TV rooms. To our best knowledge, our corpus is the first...journal article 2022
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Wu, Guohua (author), Luo, Qizhang (author), Du, Xiao (author), Chen, Yingguo (author), Suganthan, Ponnuthurai Nagaratnam (author), Wang, X. (author)Satellite observation scheduling plays a significant role in improving the efficiency of Earth observation systems. To solve the large-scale multisatellite observation scheduling problem, this article proposes an ensemble of metaheuristic and exact algorithms based on a divide-And-conquer framework (EHE-DCF), including a task allocation phase...journal article 2022
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Du, T. (author), Turrin, M. (author), Jansen, S.C. (author), van den Dobbelsteen, A.A.J.F. (author), De Luca, Francesco (author)Architectural space layout has proven to be influential on building energy performance. However, the relationship between different space layouts and their consequent energy demands has not yet been systematically studied. This study thoroughly investigates such a relationship. In order to do so, a computational method was developed, which...journal article 2022
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Guo, Baocheng (author), Du, Yunlu (author), Djelloul KHEDDA, Zakarya (author), Peng, Fei (author), Dong, J. (author), Huang, Yunkai (author), Frederic, Dubas (author), Boughrara, Kamel (author)In this article, we propose a novel nonlinear semianalytical model (AM) for the magnetic field calculation of electric machines. The nonlinear properties and local saturation effect of the iron part are taken into consideration in Cartesian coordinates, which is the main contribution of the proposed model. Thus, high accuracy of...journal article 2022
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Kulshreshtha, Y. (author), Vardon, P.J. (author), Du, Y. (author), Habert, G. (author), Vissac, A. (author), Morel, J.C. (author), van Loosdrecht, Mark C.M. (author), Mota, Nelson (author), Jonkers, H.M. (author)Earthen construction is re-gaining popularity as an ecological and economical alternative to contemporary building materials. While building with earth offers several benefits, its performance due to water ingress is a concern for its widespread application. This limitation is often solved by adding chemical stabilisers such as Portland cement...journal article 2022
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Minkman, E. (author), Nguyen, Hong Quan (author), Luu, Tang (author), Dang, Kim Khoi (author), Nguyen, Sy Linh (author), Du, Haomiao (author), Huizer, Tanya (author), Rijke, Jeroen (author)This study identifies how the governance of the transition to sustainable agriculture in the Vietnamese Mekong Delta is constrained by a lack of leadership, coordination, and funding. The Vietnamese Mekong Delta region is an important agricultural region yet highly vulnerable to climate change. In 2017, the Government of Vietnam issued...journal article 2022
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Zhao, Jian (author), Xu, Shenyu (author), Chandrasegaran, R.S.K. (author), Bryan, Christopher James (author), Du, Fan (author), Mishra, Aditi (author), Qian, Xin (author), Li, Yiran (author), Ma, Kwan Liu (author)Visual data storytelling is gaining importance as a means of presenting data-driven information or analysis results, especially to the general public. This has resulted in design principles being proposed for data-driven storytelling, and new authoring tools being created to aid such storytelling. However, data analysts typically lack...journal article 2022
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Ji, Yiran (author), Zheng, Feifei (author), Du, Jiawen (author), Huang, Yuan (author), Bi, Weiwei (author), Duan, Huan Feng (author), Savic, Dragan (author), Kapelan, Z. (author)Most of the contamination source localization methods for water distribution systems (WDSs) assume the availability of accurate water quality models and multi-parameter online sensors, which are often out of reach of many water utilities. To address this, a novel manual grab-sampling method (MGSM) is developed to effectively and efficiently...journal article 2022
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Zhang, Lei (author), Du, Zhe (author), Valdez Banda, Osiris A. (author), Goerlandt, F.M.B. (author), Du, Lei (author), Li, Xiaobin (author)Towing operations are highly reliant on the experience of the towing operators. Safety concerns arise when towing operations are subjected to environmental disturbances and dynamic traffic conditions. However, a systematic framework and approaches to enhance the safety and automation of towing operations remain lacking. This work proposes a...journal article 2022