Article
Engineering, Electrical & Electronic
Yizhou Ye, Shu Wan, Shen Li, Xuefeng He
Summary: This paper demonstrates the effect of sensing-structure taper ratio on the performance of 2-D mechanical wind sensors for the first time. The results show that the taper ratio of the sensing structure can affect the measurement range and sensitivity of the sensor. A lower taper ratio results in a wider measurement range but lower sensitivity. This study provides valuable reference for the design and manufacture of 2-D mechanical wind sensors.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Green & Sustainable Science & Technology
Ambarish Panda, Umakanta Mishra
Summary: The novelty of this study lies in proposing a combined operational strategy for a wind-solar-thermal (WST) system with a pumped hydro storage (PHS) facility to address the intermittency of wind and solar power. The study uses an environmental optimal power flow (EOPF) framework to optimize for emission minimization, operating cost reduction, and voltage security maximization. The challenge is to schedule and dispatch electrical power in a hybrid power system (HPS) without violating real-time operational constraints. The study evaluates various hybrid configurations using the particle swarm optimization (PSO) technique and shows that the WST-PHS configuration achieves significant savings in operating cost, emission reduction, and voltage security enhancement compared to other HPS.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Energy & Fuels
Jun Zhang, Xiong Du, Cheng Qian
Summary: This paper proposes a thermal management strategy to extend the lifetime of power modules and improve the reliability of wind energy systems by optimizing junction temperature control. Experimental results show that the expected lifetime can be significantly extended to meet the target lifetime, with only being applied in a specified working range to reduce disturbance on system's normal operation.
Article
Chemistry, Multidisciplinary
Guangsheng Pan, Wei Gu, Qinran Hu, Jianxiao Wang, Fei Teng, Goran Strbac
Summary: This study assesses the cost and low-carbon competitiveness of electrolytic hydrogen in China, finding that implementing time-of-use electricity prices and subsidizing photovoltaics can improve cost and CO2 emissions performance. Different types and levels of subsidies should be carefully adopted based on provincial characteristics.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Thermodynamics
Gaohang Zhang, Fengting Li, Sen Wang, Chunya Yin
Summary: This paper proposes a robust low-carbon optimization method to enhance the flexibility of the power system by utilizing various flexible resources and considering carbon capture. The simulation results confirm the feasibility and effectiveness of the proposed method.
Article
Engineering, Electrical & Electronic
Hao Xu, Zhe Wang, Zaifa Zhou, Zhenxiang Yi, Ming Qin, Qing-An Huang
Summary: This paper presents a novel strategy for efficiently extracting macromodels from weakly coupled multiphysics microelectromechanical system (MEMS) devices. The feasibility of the strategy is validated through the verification of a packaged thermal wind sensor. The strategy involves building a finite element model of the sensor, identifying it as a state space model, and constructing a macromodel that considers geometric factors and material parameters.
IEEE SENSORS JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Christiana Sasser, Meilin Yu, Ruben Delgado
Summary: This study utilizes a decision tree machine learning model to assess the effectiveness of variables such as wind speed, rotor-equivalent wind speed, and lapse rate in energy production prediction for wind projects. The model shows an improvement in prediction accuracy compared to traditional methods, particularly when combining rotor-equivalent wind speed and lapse rate. Including lapse rate in predictions is shown to be important for better performance in wind power prediction analyses.
Article
Thermodynamics
Fei Xu, Ling Hao, Lei Chen, Qun Chen, Mingshan Wei, Yong Min
Summary: This paper proposes a new method of improving wind power accommodation by integrating district heating networks flow rate regulation into power dispatch. The results show that wind power accommodation increases with increasing flow rate due to increased thermal inertia. However, the flow rate cannot be too high as the electricity consumption of water pumps becomes the main reason for improving wind power accommodation.
Article
Green & Sustainable Science & Technology
Quan Li, Nan Zhao
Summary: This paper presents a general power flow calculation method for MTDC systems, which is based on the extended AC grid topology. By utilizing sensitivity analysis, the state variables of the extended AC grid are calculated, leading to improved computational efficiency.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2022)
Article
Multidisciplinary Sciences
Kai Fukami, Kunihiko Taira
Summary: As extreme weather conditions become more frequent, it is crucial for small air vehicles to achieve stable flight in the presence of atmospheric disturbances. However, there is a lack of theoretical understanding of the influence of extreme vortical gusts on wings. In this study, machine learning is used to reveal a low-dimensional manifold that captures the extreme aerodynamics of gust-airfoil interactions, enabling real-time reconstruction, modeling, and control of unsteady gusty flows. These findings provide support for the stable flight of next-generation small air vehicles in adverse weather conditions.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Yongquan Su, Yichen Liu, Yue Fei, Lihao Wang, Jindong Cai, Siqi Chen, Zhenyu Wu
Summary: In this study, a two-step etching approach was developed to improve the precision of lead zirconate titanate (PZT) film and solve the residual issues encountered in traditional wet etching methods. The mechanism of the two-step etching process was investigated using XRD and TEM, showing the influence of etchant composition ratio on etching effect and providing accurate process range and debugging direction. The proposed etching method showed lower undercut ratio (0.62) compared to previous studies, with etching rate of 60 nm/s and selectivity between photoresists of 1.14. The inclined sidewall formation of around 30 degrees was attributed to crystal orientation dependent etch rates. The polarization hysteresis loop results revealed no significant performance loss after wet etching process.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Automation & Control Systems
Rong Han, Qianming Xu, Lei Wang, Cheng Tang, Bing Gao, Jun Wang, An Luo
Summary: This article investigates the temperature swing problem of power amplifiers in extremely low-frequency electromagnetic wave communication systems and proposes an active thermal control strategy based on modulated model predictive control. The proposed strategy reduces the junction temperature swing of power devices and extends their lifespan.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Optics
Zhiqiang Shao, Yalin Wu, Shuang Wang, Chaozhu Zhang, Zhiqiang Sun, Meiyu Yan, Yingqi Shang, Erdong Song, Zhiyuan Liu
Summary: This paper presents an all-sapphire-based pressure sensor using an optimized wet etching process to enhance interference signal quality. Experimental results show that the modulation jump issue can be solved and cavity length fluctuations reduced to +/- 5nm when the surface roughness of the pressure sensitive diaphragm is 0.39nm.
Article
Computer Science, Information Systems
Qichao Wang, Jun Liu, Peidong Wu, Xiaoying Qin
Summary: This paper proposes an active thermal control (ATC) strategy based on reactive circulating current for the parallel converter of a permanent magnet synchronous generator wind power system. By introducing reactive circulating current during sudden wind speed drops, the thermal cycle of the power semiconductor can be effectively smoothed, addressing the issue of low-frequency junction temperature fluctuations and device damage accumulation. The impact of the proposed strategy on the voltage vector and modulation index of the converter is also analyzed in detail, ensuring system stability without reducing the filter size.
Article
Energy & Fuels
Zhongmin Wan, Hanzhang Yan, Yun Sun, Chen Yang, Xi Chen, Xiangzhong Kong, Yiyu Chen, Zhengkai Tu, Xiaodong Wang
Summary: Through experiments, it has been found that the use of a new cathode flow field with metal foam can improve the thermal management performance and output performance of air-cooled proton exchange membrane fuel cells (PEMFC). The metal foam with a height of 1 mm and a width of 5 mm showed the best performance, with a decrease in temperature by 8.4 degrees Celsius and an increase in output performance by 55.1%. Therefore, it is considered the optimal sample.
Article
Engineering, Electrical & Electronic
Qing-An Huang, Bei Chen, Yan-Qing Zhu, Ming Qin
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
(2015)
Article
Engineering, Electrical & Electronic
Yan-qing Zhu, Bei Chen, Ming Qin, Jian-qiu Huang, Qing-an Huang
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2015)
Article
Engineering, Electrical & Electronic
Yan-qing Zhu, Bei Chen, Di Gao, Ming Qin, Qing-an Huang, Jian-qiu Huang
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2016)
Article
Chemistry, Analytical
Bei Chen, Yan-Qing Zhu, Zhenxiang Yi, Ming Qin, Qing-An Huang
Article
Engineering, Electrical & Electronic
Yan-Qing Zhu, Lei Han, Li-Feng Wang, Jie-Ying Tang, Qing-An Huang
IEEE ELECTRON DEVICE LETTERS
(2013)
Article
Engineering, Electrical & Electronic
Bei Chen, Yan-Qing Zhu, Ming Qin, Qing-An Huang
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
(2014)
Article
Engineering, Electrical & Electronic
Y-Q Zhu, B. Chen, F. Gu, M. Qin, Q-A Huang
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2014)
Article
Engineering, Electrical & Electronic
Y. Q. Zhu, H. Qian, L. F. Wang, L. Wang, J. Y. Tang
MICROELECTRONICS RELIABILITY
(2014)
Article
Engineering, Electrical & Electronic
Yan-qing Zhu, Yuan-yuan Shan, Ming Qin
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2015)
Article
Engineering, Electrical & Electronic
Yan-qing Zhu, Lei Han, Ming Qin, Qing-an Huang
SENSORS AND ACTUATORS A-PHYSICAL
(2014)
Review
Computer Science, Information Systems
Yanqing Zhu, Bei Chen, Ming Qin, Qing-An Huang
IEEE INTERNET OF THINGS JOURNAL
(2014)
Proceedings Paper
Engineering, Multidisciplinary
Y. Q. Zhu, C. J. Hepp, G. A. Urban
PROCEEDINGS OF THE 30TH ANNIVERSARY EUROSENSORS CONFERENCE - EUROSENSORS 2016
(2016)
Article
Engineering, Electrical & Electronic
Yan-Qing Zhu, Lei Han, Jie-Ying Tang