Results 1 to 10 of about 141,558 (121)
Sensors, 2021 Due to the COVID-19 virus being highly transmittable, frequently cleaning and disinfecting facilities is common guidance in public places. However, the more often the environment is cleaned, the higher the risk of cleaning staff getting infected ...
Shih-Ping Huang +9 more
doaj +1 more source
Sensors, 2022 Determining the direction-of-arrival (DOA) of any signal of interest has long been of great interest to the wireless localization research community for military and civilian applications.
Chien-Bang Chen +6 more
doaj +1 more source
Range-Extension Algorithms and Strategies for TDOA Ultra-Wideband Positioning System
Sensors, 2023 The Internet of Things (IoT) for smart industry requires the surveillance and management of people and objects. The ultra-wideband positioning system is an attractive solution for achieving centimeter-level accuracy in target location. While many studies
Shih-Ping Huang +7 more
doaj +1 more source
Mathematics, 2021 The model of a fully available group of servers with a Poisson flow of primary calls and the possibility of losses before and after occupying a free server is considered.
Sergey Stepanov, Mikhail Stepanov
doaj +1 more source
IET Generation, Transmission & Distribution, 2022 Concerning the insufficient accuracy of the criterion for identifying commutation failure in HVDC transmission systems, a new detection method for commutation failure based on the variation rate of commutation inductance energy is proposed.
Jing Ma, Chen Liu, Peng Cheng
doaj +1 more source
Sensorless Speed Control of Brushed DC Motor Based at New Current Ripple Component Signal Processing
Energies, 2021 Signal processing of the brushed DC motor current was developed in this paper to obtain information about a rotor speed from a measured motor current. The brushed DC motor current contains a signal with a frequency proportional to the rotor speed.
Michal Vidlak +3 more
doaj +1 more source
Coordinated suppression commutation torque ripple for brushless DC motor with commutation time
IET Electric Power Applications, 2023 A commutation torque ripple suppression strategy for the brushless DC motor (BLDCM) with commutation time is proposed. First, a torque model considering back electromotive force (back‐EMF) variation is presented, and the cause of commutation torque ...
Zhongxin Wan +3 more
doaj +1 more source
An Evaluation Method for Commutation Failure Caused by Waveform Distortion [PDF]
E3S Web of Conferences, 2021 Commutation failure is a key issue that affects the safe operation of HVDC transmission systems. Scholars at home and abroad have conducted research on the mechanism, evaluation indicators, and control strategies of commutation failure.
Zhou Hao, Su Can, Zhou Hao
doaj +1 more source
IEEE Access, 2020 This paper proposes an improved PWM-OFF-PWM of the brushless DC motor under braking condition which can reduce commutation torque ripple. Compared with other brake modulation methods, PWM-OFF-PWM can restrain non-commutation torque ripple attributed to ...
Qixun Zhou +4 more
doaj +1 more source
Commutation relations for surface operators in six-dimensional (2, 0) theory [PDF]
, 2000 The A_{N - 1} (2, 0) superconformal theory has an observable associated with every two-cycle in six dimensions. We make a natural guess for the commutation relations of these operators, which reduces to the commutation relations of Wilson and 't Hooft ...
Henningson, Mans
core +2 more sources