Results 11 to 20 of about 5,276,301 (260)

Modulation Sideband Separation Using the Teager–Kaiser Energy Operator for Rotor Fault Diagnostics of Induction Motors

open access: yesEnergies, 2019
Broken rotor bar (BRB) faults are one of the most common faults in induction motors (IM). One or more broken bars can reduce the performance and efficiency of the IM and hence waste the electrical power and decrease the reliability of the whole ...
Haiyang Li   +4 more
doaj   +1 more source

An Improved Cyclic Modulation Spectral Analysis Based on the CWT and Its Application on Broken Rotor Bar Fault Diagnosis for Induction Motors

open access: yesApplied Sciences, 2019
Induction motors (IMs) are widely used in many manufacturing processes and industrial applications. The harsh work environment, long-time enduring, and overloads mean that it is subjected to broken rotor bar (BRB) faults. The vibration signal of IMs with
Dong Zhen   +5 more
doaj   +1 more source

Effects of Bounded Uncertainties on the Dynamic Characteristics of an Overhung Rotor System with Rubbing Fault

open access: yesEnergies, 2019
This paper investigated the nonlinear vibrations of an uncertain overhung rotor system with rub-impact fault. As the clearance of the rotor and stator is getting smaller, contact between them often occurs at high rotation speeds.
Chao Fu   +4 more
doaj   +1 more source

Improvement and optimization of NMEA2000 based on an autonomous and controllable platform

open access: yesZhongguo Jianchuan Yanjiu, 2021
ObjectivesIn order to expand the application of NMEA2000 communication protocol standard and optimize and improve its transmission efficiency, an NMEA2000 data acquisition and transmission system based on an autonomous and controllable platform is ...
Weibo ZHONG   +3 more
doaj   +1 more source

A quantitative analysis of transmission efficiency versus intensity for malaria. [PDF]

open access: yes, 2010
The relationship between malaria transmission intensity and efficiency is important for malaria epidemiology, for the design of randomized control trials that measure transmission or incidence as end points, and for measuring and modelling malaria ...
Chiyaka, Christinah   +11 more
core   +1 more source

Analysis of wireless power transfer based on metamaterial using equivalent circuit

open access: yesThe Journal of Engineering, 2019
The metamaterial (MA) has been proved to enhance the efficiency of the wireless power transfer (WPT) system considerably in many studies. This study presents an equivalent circuit model using a qualitative and even quantitative simple explanation for the
Cancan Rong   +8 more
doaj   +1 more source

Vector Competence for Zika Virus Changes Depending on the Aedes aegypti’s Region of Origin in Manaus: A Study of an Endemic Brazilian Amazonian City

open access: yesViruses, 2023
Zika virus (ZIKV) is transmitted to humans by the infectious bite of mosquitoes such as Aedes aegypti. In a city, the population control of mosquitoes is carried out according to alerts generated by different districts via the analysis of the mosquito ...
Andréia da Costa Paz   +12 more
doaj   +1 more source

Research progress of blockchain network covert channel

open access: yesTongxin xuebao, 2022
Characterized by decentration, anonymity, strong robustness and tamper resistance, blockchain accompanied by digital currency is a natural carrier for building the covert communication channel.First, the definition and development history of the network ...
Leixiao LI   +5 more
doaj  

Machine Learning-Assisted Measurement Device-Independent Quantum Key Distribution on Reference Frame Calibration

open access: yesEntropy, 2021
In most of the realistic measurement device-independent quantum key distribution (MDI-QKD) systems, efficient, real-time feedback controls are required to maintain system stability when facing disturbance from either external environment or imperfect ...
Sihao Zhang   +5 more
doaj   +1 more source

Investigation into the tribodynamics of spur gear pairs considering pitch deviations and lubrication

open access: yesFriction
Pitch deviation, a type of longwave deviation, has been demonstrated to be a significant contributor to noise generation in the drive trains of motor vehicles operating at relatively high speeds. To date, numerous studies have investigated the effects of
Lintao Duan   +8 more
doaj   +1 more source

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