Results 1 to 10 of about 142,078 (293)
Commutative–non-commutative dualities [PDF]
Canadian Journal of Physics, 2020 We show that it is in principle possible to construct dualities between commutative and non-commutative theories in a systematic way. This construction exploits a generalization of the exact renormalization group equation (ERG). We apply this to the simple case of the Landau problem and then generalize it to the free and interacting non-canonical ...
Scholtz, F.G. +2 more
openaire +2 more sources
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
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
Semi-commutations and Partial commutations [PDF]
RAIRO - Theoretical Informatics and Applications, 2000 Summary: The aim of this paper is to show that a semi-commutation function can be expressed as the compound of a sequential transformation, a partial commutation function, and the reverse transformation. Moreover, we give a necessary and sufficient condition for the image of a regular language to be computed by the compound of two sequential functions ...
Clerbout, M., Roos, Y., Ryl, Isabelle
openaire +2 more sources
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