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Induction motors variable speed drives diagnosis through rotor resistance monitoring

K. YAHIA, S. ZOUZOU, F. BENCHABANE

Frontiers in Energy 2012, Volume 6, Issue 4,   Pages 420-426 doi: 10.1007/s11708-012-0192-z

Abstract: Rotor asymmetries lead to perturbations of air gap flux patterns in induction machines.It then studies the broken rotor bars (BRBs) fault by the monitoring the rotor resistance.increase when a rotor bar breaks.The rotor resistance is estimated and compared with its nominal value to detect BRBs fault.The EKF estimates the rotor flux, speed and rotor resistance on line by using only measurements of the

Keywords： induction motor     vector control     broken rotor bars (BRBs) diagnostic     extended Kalman filter (EKF)    

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A new and best approach for early detection of rotor and stator faults in induction motors coupled to

Abderrahim ALLAL,Boukhemis CHETATE

Frontiers in Energy 2016, Volume 10, Issue 2,   Pages 176-191 doi: 10.1007/s11708-015-0386-2

Abstract: PVPA) was proposed which was endowed with a dominant sensitivity in the case in which there would be rotor

Keywords： induction motor     incipient broken bar     extended Park’s vector approach     spectral analysis     inter-turn short-circuit    

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Hybrid flexural components: Testing pre-stressed steel and GFRP bars together as reinforcement for flexural

Mohammed FARUQI, Oved I. MATA, Francisco AGUINIGA

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 3,   Pages 352-360 doi: 10.1007/s11709-017-0453-3

Abstract:

Concrete members historically have used either pre-stressed steel or steel bars.The concrete had strength of 31 MPa and the slabs were respectively reinforced with 5#4 bars and 3#5bars.

Keywords： Partial pre-stressing     composite structures     GFRP bars    

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Experimental study on the progressive failure and its anchoring effect of weak-broken rock vertical slope

Hehua ZHU, Qianwei XU, Wenqi DING, Feng HUANG

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 208-224 doi: 10.1007/s11709-011-0111-0

Abstract: To improve the understanding on the failure behavior and its anchoring effect of weak-broken rock slope

Keywords： progressive failure     weak-broken rock     slope     model test     bolt    

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Performance of a novel bent-up bars system not interacting with concrete

Aydin SHISHEGARAN, Mohammad Reza GHASEMI, Hesam VARAEE

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1301-1315 doi: 10.1007/s11709-019-0552-4

Abstract: The proposed method uses a new reinforcement bar system having bent-up bars, covered with rubber tubesThis technique will avoid interaction of bent-up bars with concrete.The compressive force in the upper point of the bent-up bars is exerted to the end point of these bars

Keywords： bending capacity     rubber tube     stress transfer     bent-up bars     ductility     cracking    

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A novel NN based rotor flux MRAS to overcome low speed problems for rotor resistance estimation in vector

Venkadesan ARUNACHALAM,Himavathi SRINIVASAN,A. MUTHURAMALINGAM

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 382-392 doi: 10.1007/s11708-016-0421-y

Abstract: neural network based model reference adaptive system (MRAS) to solve low speed problems for estimating rotorThe MRAS using rotor flux as the state variable with a two layer online trained neural network rotorflux estimator as the adaptive model (FLUX-MRAS) for rotor resistance estimation is popularly used inThese lead to a significant error in the estimation of rotor resistance at low speed.
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Increased expression of coronin-1a in amyotrophic lateral sclerosis: a potential diagnostic biomarker

Frontiers of Medicine 2022, Volume 16, Issue 5,   Pages 723-735 doi: 10.1007/s11684-021-0905-y

Abstract: Amyotrophic lateral sclerosis (ALS) is the most common motor neuron disease. At present, no definite ALS biomarkers are available. In this study, exosomes from the plasma of patients with ALS and healthy controls were extracted, and differentially expressed exosomal proteins were compared. Among them, the expression of exosomal coronin-1a (CORO1A) was 5.3-fold higher than that in the controls. CORO1A increased with disease progression at a certain proportion in the plasma of patients with ALS and in the spinal cord of ALS mice. CORO1A was also overexpressed in NSC-34 motor neuron-like cells, and apoptosis, oxidative stress, and autophagic protein expression were evaluated. CORO1A overexpression resulted in increased apoptosis and oxidative stress, overactivated autophagy, and hindered the formation of autolysosomes. Moreover, CORO1A activated Ca2+-dependent phosphatase calcineurin, thereby blocking the fusion of autophagosomes and lysosomes. The inhibition of calcineurin activation by cyclosporin A reversed the damaged autolysosomes. In conclusion, the role of CORO1A in ALS pathogenesis was discovered, potentially affecting the disease onset and progression by blocking autophagic flux. Therefore, CORO1A might be a potential biomarker and therapeutic target for ALS.

Keywords： amyotrophic lateral sclerosis     coronin-1a     autophagy     pathogenesis    

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Records Broken for Optical Fiber Capacity and Distance

Mitch Leslie

Engineering 2021, Volume 7, Issue 2,   Pages 139-140 doi: 10.1016/j.eng.2020.12.010

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Obesity in China: its characteristics, diagnostic criteria, and implications

Weiping Jia

Frontiers of Medicine 2015, Volume 9, Issue 2,   Pages 129-133 doi: 10.1007/s11684-015-0387-x

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Stability and dynamics of rotor system with 45° slant crack on shaft

Yanli LIN, Xiaohui SI, Fulei CHU

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2,   Pages 203-213 doi: 10.1007/s11465-011-0131-4

Abstract:

Crack on a shaft is one of the common damages in a rotor system.transverse vibrations are calculated to compare the influences of transverse crack and slant crack on the rotorResults show that the vibration amplitude of the rotor system with a 45° slant crack on the shaftis larger than that with a transverse crack when the two types of crack have the same depth and the rotorStability and dynamic characteristics of the rotor system with a 45° slant crack on the shaft under

Keywords： rotor dynamics     slant crack     stability     torsional excitation     open and close    

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Study on wave rotor refrigerators

Yuqiang DAI, Dapeng HU, Meixia DING

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 1,   Pages 83-87 doi: 10.1007/s11705-009-0075-y

Abstract: As a novel generation of a rotational gas wave machine, the wave rotor refrigerator (WRR) is an unsteady

Keywords： wave rotor     refrigeration     unsteady flow theory     wave diagram    

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The effect of carbon nanotubes and polypropylene fibers on bond of reinforcing bars in strain resilient

Souzana P. TASTANI,Maria S. KONSTA-GDOUTOS,Stavroula J. PANTAZOPOULOU,Victor BALOPOULOS

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 2,   Pages 214-223 doi: 10.1007/s11709-016-0332-3

Abstract: Stress transfer between reinforcing bars and concrete is engaged through rib translation relative toresistance and controlled slippage.The aim of this paper is to investigate the local bond of steel bars

Keywords： carbon nanotubes     strain resilient cementitious composite     polypropylene fibers     tensile bending     bond    

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Optimization model for rotor blades of horizontal axis wind turbines

LIU Xiong, CHEN Yan, YE Zhiquan

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 483-488 doi: 10.1007/s11465-007-0084-9

Abstract: This paper presents an optimization model for rotor blades of horizontal axis wind turbines.

Keywords： population     extended     algorithm     developed optimization     accurate    

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The computational fluid dynamic modeling of downwash flow field for a six-rotor UAV

Yongjun ZHENG, Shenghui YANG, Xingxing LIU, Jie WANG, Tomas NORTON, Jian CHEN, Yu TAN

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 2,   Pages 159-167 doi: 10.15302/J-FASE-2018216

Abstract: The downwash flow field of the multi-rotor unmanned aerial vehicle (UAV), formed by propellers duringcharacteristics of the distribution of the downwash airflow and simulate the static wind field of multi-rotorUAVs in hovering state, a 3D full-size physical model of JF01-10 six-rotor plant protection UAV wasThese results can be applied to six-rotor plant protection UAVs employed in pesticide spraying and spray

Keywords： CFD simulation     downwash flow field     numerical analysis     plant protection     six-rotor UAV    

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Structure improvement and strength finite element analysis of VHP welded rotor of 700°C USC steam turbine

Jinyuan SHI,Zhicheng DENG,Yong WANG,Yu YANG

Frontiers in Energy 2016, Volume 10, Issue 1,   Pages 88-104 doi: 10.1007/s11708-015-0387-1

Abstract: shutdown, to obtain the temperature and stress distribution as well as the stress ratio of the welded rotorThe strength design criteria and strength analysis results of the welded rotor are given.The results show that the strength design of improved structure of the VHP welded rotor of the 700°C

Keywords： 700°C ultra-super-critical unit     steam turbine     very high pressure rotor     structure strength design     strength    

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Title Author Date Type Operation

Induction motors variable speed drives diagnosis through rotor resistance monitoring

K. YAHIA, S. ZOUZOU, F. BENCHABANE

Journal Article

A new and best approach for early detection of rotor and stator faults in induction motors coupled to

Abderrahim ALLAL,Boukhemis CHETATE

Journal Article

Hybrid flexural components: Testing pre-stressed steel and GFRP bars together as reinforcement for flexural

Mohammed FARUQI, Oved I. MATA, Francisco AGUINIGA

Journal Article

Experimental study on the progressive failure and its anchoring effect of weak-broken rock vertical slope

Hehua ZHU, Qianwei XU, Wenqi DING, Feng HUANG

Journal Article

Performance of a novel bent-up bars system not interacting with concrete

Aydin SHISHEGARAN, Mohammad Reza GHASEMI, Hesam VARAEE

Journal Article

A novel NN based rotor flux MRAS to overcome low speed problems for rotor resistance estimation in vector

Venkadesan ARUNACHALAM,Himavathi SRINIVASAN,A. MUTHURAMALINGAM

Journal Article

Increased expression of coronin-1a in amyotrophic lateral sclerosis: a potential diagnostic biomarker

Journal Article

Records Broken for Optical Fiber Capacity and Distance

Mitch Leslie

Journal Article

Obesity in China: its characteristics, diagnostic criteria, and implications

Weiping Jia

Journal Article

Stability and dynamics of rotor system with 45° slant crack on shaft

Yanli LIN, Xiaohui SI, Fulei CHU

Journal Article

Study on wave rotor refrigerators

Yuqiang DAI, Dapeng HU, Meixia DING

Journal Article

The effect of carbon nanotubes and polypropylene fibers on bond of reinforcing bars in strain resilient

Souzana P. TASTANI,Maria S. KONSTA-GDOUTOS,Stavroula J. PANTAZOPOULOU,Victor BALOPOULOS

Journal Article

Optimization model for rotor blades of horizontal axis wind turbines

LIU Xiong, CHEN Yan, YE Zhiquan

Journal Article

The computational fluid dynamic modeling of downwash flow field for a six-rotor UAV

Yongjun ZHENG, Shenghui YANG, Xingxing LIU, Jie WANG, Tomas NORTON, Jian CHEN, Yu TAN

Journal Article

Structure improvement and strength finite element analysis of VHP welded rotor of 700°C USC steam turbine

Jinyuan SHI,Zhicheng DENG,Yong WANG,Yu YANG

Journal Article