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Large geomagnetic anomaly of impending earthquake gives a possibility in earthquake early warning

Zeng Xiaoping,Zheng Ji´ang , Wang Zhaoyi, Zhang Suqin, Lin Yunfang

Strategic Study of CAE 2011, Volume 13, Issue 4,   Pages 48-53

Abstract:

Strong magnetic anomalies repeatedly took place before big earthquakesBased on geomagnetic record analysis results, we discussed a possible pattern of the magnetic anomaliesWe calculated that, in a place of 1 km from the epicenter, the magnetic anomaly before destructive earthquakesAccordingly, we proposed that geomagnetic induction earthquake pre-warning can be a new early warningmethod to surmount hardship in solving the puzzledom of earthquake imminent prediction.

Keywords： seismomagnetic effect     geomagnetic induction pre warning     pre-imminent magnetic anomaly     intermittentmagnetic eruption     Tesla effect    

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A magnetic adsorbent based on salicylic acid-immobilized magnetite nano-particles for pre-concentration

Hossein Abdolmohammad-Zadeh, Arezu Salimi

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 450-459 doi: 10.1007/s11705-020-1930-0

Abstract: In this research, an eco-friendly magnetic adsorbent based on Fe O /salicylic acid nanocomposite wasThe nanocomposite was employed as a magnetic solid-phase extraction agent for separation of Cd(II) ionsFollowing elution with acetic acid (pH 3.5), the pre-concentrated analyte was quantified by flame atomic

Keywords： cadmium     magnetic solid-phase extraction     Fe3O4 nanoparticles     Fe3O   

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Adverse Geology Identification Through Mineral Anomaly Analysis During Tunneling: Methodology and Case Article

Zhenhao Xu, Tengfei Yu, Peng Lin, Shucai Li

Engineering 2023, Volume 27, Issue 8,   Pages 150-160 doi: 10.1016/j.eng.2022.09.013

Abstract: Here, we propose a method for adverse geology identification in tunnels based on mineral anomaly analysisThe method uses exploration data analysis (EDA) to calculate mineral anomaly thresholds, then evaluatesprocess for background samples to achieve the dynamic evaluation of mineral anomalies by adjusting anomaly

Keywords： Mineral anomaly     Adverse geology     Fault     Alteration     Anomaly threshold    

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Modeling and analysis of magnetic dipoles in weak magnetic field

WANG Zhaoxia, ZHANG Weimin, LIU Hongguang

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2,   Pages 222-225 doi: 10.1007/s11465-008-0028-z

Abstract: The magnetic leakage field distribution resulting from linear defects of a tube sample in the geomagneticfield is modeled according to the magnetic dipole theory.The formula to compute the normal component of the weak magnetic field is deduced based on the spatialdistribution of the magnetic dipole.The shape and characteristics of the zero line (an important criterion for magnetic memory testing) of

Keywords： geomagnetic     theory     important criterion     magnetic leakage     normal component    

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Data-Driven Anomaly Diagnosis for Machining Processes Article

Y.C. Liang, S. Wang, W.D. Li, X. Lu

Engineering 2019, Volume 5, Issue 4,   Pages 646-652 doi: 10.1016/j.eng.2019.03.012

Abstract:

To achieve zero-defect production during computer numerical control (CNC) machining processes, it is imperative to develop effective diagnosis systems to detect anomalies efficiently. However, due to the dynamic conditions of the machine and tooling during machining processes, the relevant diagnosis systems currently adopted in industries are incompetent. To address this issue, this paper presents a novel data-driven diagnosis system for anomalies. In this system, power data for condition monitoring are continuously collected during dynamic machining processes to support online diagnosis analysis. To facilitate the analysis, preprocessing mechanisms have been designed to denoise, normalize, and align the monitored data. Important features are extracted from the monitored data and thresholds are defined to identify anomalies. Considering the dynamic conditions of the machine and tooling during machining processes, the thresholds used to identify anomalies can vary. Based on historical data, the values of thresholds are optimized using a fruit fly optimization (FFO) algorithm to achieve more accurate detection. Practical case studies were used to validate the system, thereby demonstrating the potential and effectiveness of the system for industrial applications.

Keywords： Computer numerical control machining     Anomaly detection     Fruit fly optimization algorithm     Data-driven    

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Nonlinear analysis of pre-tensioned glass wall facade by stability function with initial imperfection

Siu-Lai CHAN, Yaopeng LIU, Andy LEE,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3,   Pages 376-382 doi: 10.1007/s11709-010-0086-2

Abstract: Pre-tensioned high strength trusses using alloy steel bar are widely used as glass wall supporting systemsvarious effects, such as support settlement due to live loads and material creep, temperature change, pre-tension

Keywords： tension system     glass wall     nonlinear analysis     pre-tensioning     second-order analysis    

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Continuous size fractionation of magnetic nanoparticles by using simulated moving bed chromatography

Carsten-Rene Arlt, Dominik Brekel, Stefan Neumann, David Rafaja, Matthias Franzreb

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1346-1355 doi: 10.1007/s11705-021-2040-3

Abstract: The size fractionation of magnetic nanoparticles is a technical problem, which until today can only beUsing magnetic chromatography, we show a promising method for fractionation of magnetic nanoparticleswith respect to their size and/or magnetic properties.This was achieved by passing magnetic nanoparticles through a packed bed of fine steel spheres with whichThe continuous feed stream of magnetic nanoparticles could be fractionated with a space-time-yield of

Keywords： magnetic chromatography     simulated moving bed chromatography     magnetic nanoparticles     size fractionation    

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Magnetostriction varieties and stress relief caused by pulsed magnetic field

Zhipeng CAI, Xinjie DUAN, Jian LIN, Haiyan ZHAO

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3,   Pages 354-358 doi: 10.1007/s11465-011-0123-4

Abstract:

Magnetostriction is investigated to evaluate the stress relief caused by pulsed magnetic field treatmentThe stress variations caused by pulsed magnetic treatment are also compared.find that the product of magnetostriction amplitude and stress magnitude is nearly a constant during magnetic

Keywords： magnetostriction     pulsed magnetic field treatment     stress relief    

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A pre-compensation method of the systematic contouring error for repetitive command paths

D. L. ZHANG,Y. H. CHEN,Y. P. CHEN

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4,   Pages 367-372 doi: 10.1007/s11465-015-0367-5

Abstract:

For a repetitive command path, pre-compensating the contouring error by modifying the command pathTo obtain the pre-compensation value with better accuracy, this paper proposes the use of a back propagationFurthermore, by using the extracted function, the contouring error can be easily pre-compensated.

Keywords： contouring error     pre-compensation     motion control system     back propagation (BP) neural network    

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Experimental and parametrical investigation of pre-stressed ultrahigh-performance fiber-reinforced concrete

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 411-428 doi: 10.1007/s11709-023-0928-3

Abstract: In this study, ultrahigh-performance fiber-reinforced concrete (UHPFRC) used in a type B70 concrete sleeper is investigated experimentally and parametrically. The main parameters investigated are the steel fiber volume fractions (0%, 0.5%, 1%, and 1.5%). Under European standards, 35 UHPFRC sleepers are subjected to static bending tests at the center and rail seat sections, and the screw on the fastening system is pulled out. The first cracking load, failure load, failure mode, crack propagation, load–deflection curve, load–crack width, and failure load from these tests are measured and compared with those of a control sleeper manufactured using normal concrete C50. The accuracy of the parametric study is verified experimentally. Subsequently, the results of the study are applied to UHPFRC sleepers with different concrete volumes to investigate the effects of the properties of UHPFRC on their performance. Experimental and parametric study results show that the behavior of UHPFRC sleepers improves significantly when the amount of steel fiber in the mix is increased. Sleepers manufactured using UHPFRC with a steel fiber volume fraction of 1% and a concrete volume less than 25% that of standard sleeper B70 can be used under the same loads and requirements, which contributes positively to the cost and surrounding environment.

Keywords： pre-stressed concrete sleeper     ultrahigh performance fiber-reinforced concrete     pull-out test     static    

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Synergistic scale inhibition of polyaspartic acid composite with magnetic field

LIU Zhenfa, WANG Yanji, GAO Yuhua, ZHANG Lihui

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 3,   Pages 261-265 doi: 10.1007/s11705-007-0047-z

Abstract: The scale inhibition of PASP composite and the effect of its synergism with a magnetic field on scaleexperiments show that the chelating function of PASP composite for Ca can be enhanced by synergism with a magnetic650 mg/L, HCO 1,300 mg/L and PASP composite 4 mg/L, the scale inhibition rate of PASP composite in magnetic

Keywords： synergism     magnetic     PBTCA     dynamic     acid–acrylic acid–acrylic    

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Rare-earth separation based on the differences of ionic magnetic moment via quasi-liquid strategy

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1584-1594 doi: 10.1007/s11705-022-2189-4

Abstract: The differences of the ionic magnetic moment among rare earths are greater than that of ionic radius.Herein, a novel method based on the large ionic magnetic moment differences of rare earth elements wasionic liquid, then the ordering degree of them was improved with the Z-bond effect, and finally the magneticEr/Ho as examples, the results showed that Er(III) and Ho(III) containing ionic liquids had obvious magneticMagnetic separation via quasi-liquid system strategy provides a possibility of the novel, green, and

Keywords： rare earth element     different magnetic moment     magnetic separation     ionic liquid    

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A new miniaturized engine based on thermomagnetic effect of magnetic fluids

Lujun ZHOU, Yimin XUAN, Qiang LI, Wenlei LIAN

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 160-166 doi: 10.1007/s11708-009-0018-9

Abstract: A new engine system, essentially consisting of a permanent NdFeB magnet, a kerosene-based magnetic fluidand a rotor, is proposed based on the thermomagnetic effect of a temperature-sensitive magnetic fluidThe rotor was driven by the thermal convection of the magnetic fluid in the presence of a homogeneousexternal magnetic field.The performance of the motor is considerably influenced by the magnetic field imposed.

Keywords： magnetic fluid     thermomagnetic effect     engine    

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Investigation into viability of using two-stage (pre-placed aggregate) concrete in Irish setting

John O’MALLEY, Hakim S. ABDELGADER,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1,   Pages 127-132 doi: 10.1007/s11709-010-0007-4

Abstract: Two-stage (pre-placed aggregate) concrete (TSC) consists of coarse aggregate, which is first deposited

Keywords： grout     pre-placed     concrete     two-stage concrete (TSC)    

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Rotating magnetic beacons magnetic field strength size in SAGD

Bing TU, Desheng LI, Enhuai LIN, Bin LUO, Jian HE, Lezhi YE, Jiliang LIU, Yuezhong WANG

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 446-449 doi: 10.1007/s11465-010-0113-y

Abstract: Rotation magnetic beacons magnetic field strength is very important to drill parallel horizontal twinthere is a length of 12.6 mm with permanent magnet, and in the middle, there is a length of 78 mm with magneticThe magnetic field strength generated by the magnetic material of 1J12, 1J50, and 1J79 is analyzed, respectivelyANSOFT software is used to simulate the magnetic field strength generated by different magnetic materials

Keywords： rotating magnetic beacons     steam assisted gravity drainage (SAGD)     ANSOFT    

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Title Author Date Type Operation

Large geomagnetic anomaly of impending earthquake gives a possibility in earthquake early warning

Zeng Xiaoping,Zheng Ji´ang , Wang Zhaoyi, Zhang Suqin, Lin Yunfang

Journal Article

A magnetic adsorbent based on salicylic acid-immobilized magnetite nano-particles for pre-concentration

Hossein Abdolmohammad-Zadeh, Arezu Salimi

Journal Article

Adverse Geology Identification Through Mineral Anomaly Analysis During Tunneling: Methodology and Case

Zhenhao Xu, Tengfei Yu, Peng Lin, Shucai Li

Journal Article

Modeling and analysis of magnetic dipoles in weak magnetic field

WANG Zhaoxia, ZHANG Weimin, LIU Hongguang

Journal Article

Data-Driven Anomaly Diagnosis for Machining Processes

Y.C. Liang, S. Wang, W.D. Li, X. Lu

Journal Article

Nonlinear analysis of pre-tensioned glass wall facade by stability function with initial imperfection

Siu-Lai CHAN, Yaopeng LIU, Andy LEE,

Journal Article

Continuous size fractionation of magnetic nanoparticles by using simulated moving bed chromatography

Carsten-Rene Arlt, Dominik Brekel, Stefan Neumann, David Rafaja, Matthias Franzreb

Journal Article

Magnetostriction varieties and stress relief caused by pulsed magnetic field

Zhipeng CAI, Xinjie DUAN, Jian LIN, Haiyan ZHAO

Journal Article

A pre-compensation method of the systematic contouring error for repetitive command paths

D. L. ZHANG,Y. H. CHEN,Y. P. CHEN

Journal Article

Experimental and parametrical investigation of pre-stressed ultrahigh-performance fiber-reinforced concrete

Journal Article

Synergistic scale inhibition of polyaspartic acid composite with magnetic field

LIU Zhenfa, WANG Yanji, GAO Yuhua, ZHANG Lihui

Journal Article

Rare-earth separation based on the differences of ionic magnetic moment via quasi-liquid strategy

Journal Article

A new miniaturized engine based on thermomagnetic effect of magnetic fluids

Lujun ZHOU, Yimin XUAN, Qiang LI, Wenlei LIAN

Journal Article

Investigation into viability of using two-stage (pre-placed aggregate) concrete in Irish setting

John O’MALLEY, Hakim S. ABDELGADER,

Journal Article

Rotating magnetic beacons magnetic field strength size in SAGD

Bing TU, Desheng LI, Enhuai LIN, Bin LUO, Jian HE, Lezhi YE, Jiliang LIU, Yuezhong WANG

Journal Article