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Experimental investigation and comparative study of inter-turn short-circuits and unbalanced voltage

Fatima BABAA, Abdelmalek KHEZZAR, Mohamed el kamel OUMAAMAR

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 271-278 doi: 10.1007/s11708-013-0258-6

Abstract: A transient model for an induction machine with stator winding turn faults on a single phase is deriveddifficult to distinguish between the current harmonics due to the supply voltage and those originated by inter-turnshort-circuit faults.and the reliability of the diagnostic system, it is crucial to provide the relationship between the inter-turnshort-circuits in the stator winding and the supply voltage imbalance through an accurate mathematical

Keywords： induction machines     fault indicator     inter-turn short-circuit fault     unbalance supply voltage    

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

Abderrahim ALLAL,Boukhemis CHETATE

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

Abstract: Today, induction machines are playing, thanks to their robustness, an important role in world industries. Although they are quite reliable, they have become the target of various types of defects. Thus, for a long time, many research laboratories have been focusing their works on the theme of diagnosis in order to find the most efficient technique to predict a fault in an early stage and to avoid an unplanned stopping in the chain of production and costs ensuing. In this paper, an approach called Park’s vector product approach (PVPA) was proposed which was endowed with a dominant sensitivity in the case in which there would be rotor or stator faults. To show its high sensitivity, it was compared with the classical methods such as motor current signature analysis (MCSA) and techniques studied in recent publications such as motor square current signature analysis (MSCSA), Park’s vector square modulus (PVSM) and Park-Hilbert (P-H) (PVSM ). The proposed technique was based on three main steps. First, the three-phase currents of the induction motor led to a Park’s vector. Secondly, the proposed PVPA was calculated to show the distinguishing spectral signatures of each default and specific frequencies. Finally, simulation and experimental results were presented to confirm the theoretical assumptions.

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

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Learning Machine-Based Thermal Model for Lithium-Ion Batteries of Electric Vehicles under External ShortCircuit Article

Ruixin Yang, Rui Xiong, Weixiang Shen, Xinfan Lin

Engineering 2021, Volume 7, Issue 3,   Pages 395-405 doi: 10.1016/j.eng.2020.08.015

Abstract:

External short circuit (ESC) of lithium-ion batteries is one of the common and severe electrical failures

Keywords： Electric vehicles     Battery safety     External short circuit     Temperature prediction     Extreme learning machine    

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Investigating the role of exiting vehicles and turn indicator usage in gap acceptance at single-lane

Nathan P. BELZ

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 1,   Pages 8-16 doi: 10.1007/s11709-016-0365-7

Abstract: This research addresses the nature of gap distributions and use of turn indicators by exiting vehiclesResults indicate that exiting vehicles, particularly those that do not use their turn indicators whenResults prompt the consideration of more consistent guidance on and enforcement of turn indicator use

Keywords： roundabouts     exiting vehicles     turn indicator use     headways    

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Research of an Improved Bridge Type Solid-state Current Limiter

Li Hongfeng,Jia Guixi,Qi Wei,Xu Wei

Strategic Study of CAE 2005, Volume 7, Issue 8,   Pages 75-79

Abstract:

As the expanding of power system capacity, the technologies of short circuit current limiting in power

Keywords： short circuit current limiter     novel bridge type circuit     simulation based on Matlab/Simulink     dynamic-mode    

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Machinability of damage-tolerant titanium alloy in orthogonal turn-milling

Tao SUN, Lufang QIN, Junming HOU, Yucan FU

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 3,   Pages 504-515 doi: 10.1007/s11465-020-0586-2

Abstract: Orthogonal turn-milling can be used to solve these problems.In this study, the machinability of TC21 in orthogonal turn-milling is investigated experimentally tooptimize the cutting parameters of orthogonal turn-milling and improve the machining efficiency, toolThen, reasonable cutting parameters for TC21 in orthogonal turn-milling are recommended.and improves the applicability of orthogonal turn-milling for such materials.

Keywords： orthogonal turn-milling     damage-tolerant titanium alloy     tool life and failure     machined surface integrity    

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Technology on settlement monitoring and evaluation in bridge pier in Beijing-Tianjin inter-city railway

Ding Yuanwen

Strategic Study of CAE 2009, Volume 11, Issue 1,   Pages 43-47

Abstract: model and determinant conditions of settlement are proposed simultaneously, taking Beijing-Tianjin inter-city

Keywords： Beijing-Tianjin inter-city railway     bridge     settlement monitoring     evaluation    

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Variable eccentric distance-based tool path generation for orthogonal turn-milling

Fangyu PENG,Wei WANG,Rong YAN,Xianyin DUAN,Bin LI

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4,   Pages 352-366 doi: 10.1007/s11465-015-0361-y

Abstract:

This study proposes an algorithm for maximizing strip width in orthogonal turn-milling based on variable

Keywords： orthogonal turn-milling     variable eccentric distance     local cutting profile     machining strip-width maximization    

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A novel flavonol-based colorimetric and turn-on fluorescent probe for rapid determination of hydrazine

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 24-33 doi: 10.1007/s11705-022-2171-1

Abstract: Hydrazine is extremely toxic and causes severe harm to human body. Herein, a novel fluorescent probe 4-oxo-2-styryl-4H-chromen-3-yl thiophene-2-carboxylate (FHT) was synthesized for detecting hydrazine by using natural cinnamaldehyde as starting material. This probe exhibited significantly enhanced fluorescence response towards hydrazine over various common metal ions, anions, and amine compounds. The detection limit of probe FHT for hydrazine was as low as 0.14 μmol·L–1, significantly lower than that of the threshold value of 0.312 μmol·L–1, imposed by the Environmental Protection Agency. Moreover, the proposed probe was able to detect hydrazine within wide pH (5–10) and linear detection ranges (0–110 μmol·L–1). This probe was employed for determining trace hydrazine in different environmental water samples. The probe FHT-loaded filter paper strips were able to conveniently detect hydrazine of low concentration through distinct naked-eye and fluorescent color changes. Importantly, the probe FHT with low cytotoxicity was successfully applied to visualize hydrazine in living Hela cells and zebrafish.

Keywords： cinnamaldehyde     3-hydroxychromone derivative     hydrazine     fluorescent probe    

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Impact of inter-fuel substitution on energy intensity in Ghana

Boqiang LIN, Hermas ABUDU

Frontiers in Energy 2020, Volume 14, Issue 1,   Pages 27-41 doi: 10.1007/s11708-019-0656-5

Abstract: Energy intensity and elasticity, together with inter-fuel substitution are key issues in the currentAn inter-fuel substitution future scenario design was further conducted and the results were positive

Keywords： energy intensity     energy elasticity     inter-fuel substitution prospects     energy contribution     Translog production    

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New method to determine optimum impedance of fault current limiters for symmetrical and/or asymmetrical faults in power systems None

Mahmoud MODARESI, Hamid LESANI

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 2,   Pages 297-307 doi: 10.1631/FITEE.1601689

Abstract: To select the type and value of the impedance of fault current limiters (FCLs) for power network designers, we introduce a new method to calculate the optimum value of FCL impedance depending on its position in the network. Due to the complexity of its impedance, the costs of both real and imaginary parts of FCL impedance are considered. The optimization of FCL impedance is based on a goal function that maximizes the reduction of the fault current while minimizing the costs. While the position of FCL in the network has an effect on the calculation of the optimum impedance value, the method for selecting FCL location is not the focus of this study. The proposed method for optimizing FCL impedance can be used for every network that has symmetrical and/or asymmetrical faults. We use a 14-bus IEEE network as an example to explain the process. The optimum FCL impedance used in this network is calculated by considering the vast range of costs for both real and imaginary parts of FCL impedance.

Keywords： Fault current limiter (FCL)     FCL impedance     Short circuit current     Fault current     Power system    

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Self-catalytic pyrolysis thermodynamics of waste printed circuit boards with co-existing metals

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 11, doi: 10.1007/s11783-022-1581-0

Abstract:

● The co-existing metals in WPCBs has positive catalytic influence in pyrolysis.

Keywords： Waste printed circuit board     Catalyst     Pyrolysis     Kinetics    

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Yuan-zhang Liu: a Short Biography

Anon

Frontiers of Engineering Management 2014, Volume 1, Issue 1,   Pages 113-114 doi: 10.1530/J-FEM-2014016

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Non-toxic, high selectivity process for the extraction of precious metals from waste printed circuit

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 10, doi: 10.1007/s11783-023-1723-z

Abstract:

● Au, Ag and Pd were recovered from WPCBs with high efficiencies.

Keywords： Thiosulfate     Printed circuit boards     Precious metals     Leaching     Hydrometallurgy    

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Financing Model Decision of Inter-basin Water Transfer Projects

Ji-wei Zhu,Li-nan Zhou,Zhao Zhai,Cong Wang

Frontiers of Engineering Management 2016, Volume 3, Issue 4,   Pages 396-403 doi: 10.15302/J-FEM-2016060

Abstract: Inter-basin Water Transfer Projects require the appropriate financing model to attract large amountsFirst, the complex financing mode decision problems of Inter-basin Water Transfer Projects are decomposedevaluation results are also reliable and provide theoretical references for the financing model decision of Inter-basin

Keywords： Inter-basin Water Transfer Projects     financing model     Weighted Grey Target Model     water diversion     Han River    

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Title Author Date Type Operation

Experimental investigation and comparative study of inter-turn short-circuits and unbalanced voltage

Fatima BABAA, Abdelmalek KHEZZAR, Mohamed el kamel OUMAAMAR

Journal Article

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

Abderrahim ALLAL,Boukhemis CHETATE

Journal Article

Learning Machine-Based Thermal Model for Lithium-Ion Batteries of Electric Vehicles under External ShortCircuit

Ruixin Yang, Rui Xiong, Weixiang Shen, Xinfan Lin

Journal Article

Investigating the role of exiting vehicles and turn indicator usage in gap acceptance at single-lane

Nathan P. BELZ

Journal Article

Research of an Improved Bridge Type Solid-state Current Limiter

Li Hongfeng,Jia Guixi,Qi Wei,Xu Wei

Journal Article

Machinability of damage-tolerant titanium alloy in orthogonal turn-milling

Tao SUN, Lufang QIN, Junming HOU, Yucan FU

Journal Article

Technology on settlement monitoring and evaluation in bridge pier in Beijing-Tianjin inter-city railway

Ding Yuanwen

Journal Article

Variable eccentric distance-based tool path generation for orthogonal turn-milling

Fangyu PENG,Wei WANG,Rong YAN,Xianyin DUAN,Bin LI

Journal Article

A novel flavonol-based colorimetric and turn-on fluorescent probe for rapid determination of hydrazine

Journal Article

Impact of inter-fuel substitution on energy intensity in Ghana

Boqiang LIN, Hermas ABUDU

Journal Article

New method to determine optimum impedance of fault current limiters for symmetrical and/or asymmetrical faults in power systems

Mahmoud MODARESI, Hamid LESANI

Journal Article

Self-catalytic pyrolysis thermodynamics of waste printed circuit boards with co-existing metals

Journal Article

Yuan-zhang Liu: a Short Biography

Anon

Journal Article

Non-toxic, high selectivity process for the extraction of precious metals from waste printed circuit

Journal Article

Financing Model Decision of Inter-basin Water Transfer Projects

Ji-wei Zhu,Li-nan Zhou,Zhao Zhai,Cong Wang

Journal Article