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A Blasting Sources-Based Approach to Inspection of Faults in Dam

Zhou Hougui,Tan Kaiyan

Strategic Study of CAE 2007, Volume 9, Issue 4,   Pages 79-82

Abstract:

An approach to inspection of incipient faults in dam by non_d estructive testing is a so far emerging inspection technology in the world. In this paper, inspection principles, system integrity and key items of the new blasting source-based technology for inspection of incipient faults in dam, different from common non- destructive testing, are presented, following briefing experiences in dam inspection by elastic wave CT in recent years. Specific procedures and goals for further spreading and application as well as conclusion are introduced finally.

Keywords： blasting source     dam     inspection of incipient fault     elastic wave     dynamic monitoring     excitation signal    

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Approximation of structural damping and input excitation force

Mohammad SALAVATI

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 244-254 doi: 10.1007/s11709-016-0371-9

Abstract: Structural dynamic characteristics are the most significant parameters that play a decisive role in structural damage assessment. The more sensitive parameter to the damage is the damping behavior of the structure. The complexity of structural damping mechanisms has made this parameter to be one of the ongoing research topics. Despite all the difficulties in the modeling of damping, there are some approaches like as linear and nonlinear models which are described as the energy dissipation throughout viscous, material or structural hysteretic and frictional damping mechanisms. In the presence of a mathematical model of the damping mechanisms, it is possible to estimate the damping ratio from the theoretical comparison of the damped and un-damped systems. On the other hand, solving the inverse problem of the input force estimation and its distribution to each SDOFs, from the measured structural responses plays an important role in structural identification process. In this paper model-based damping approximation method and a model-less structural input estimation are considered. The effectiveness of proposed methods has been carried out through analytical and numerical simulation of the lumped mass system and the results are compared with reference data. Consequently, high convergence of the comparison results illustrates the satisfactory of proposed approximation methods.

Keywords： structural modal parameters     damping identification method     input excitation force identification     Inverse    

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Simulation Research on PWM Control in Excitation System of Generator

Jia Guixi,Xu Wei,Guo Baoyue,Zhang Chentang

Strategic Study of CAE 2005, Volume 7, Issue 6,   Pages 50-53

Abstract:

A high quality excitation system not only plays an important role in the stability of power systemIn this paper, a PWM rectifier is applied to excitation system of synchronous generators.;s supply by achieving low harmonic current conversion and improving high power factor transform of excitation

Keywords： PWM     high power factor     excitation system     Matlab simulation    

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A subband excitation substitute based scheme for narrowband speech watermarking Article

Wei LIU, Ai-qun HU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 5,   Pages 627-643 doi: 10.1631/FITEE.1601503

Abstract: speech watermarking scheme by replacing part of the speech with a scaled and spectrally shaped hidden signalAt the embedder, the power normalization criterion is first imposed on a passband watermark signal byforcing its power level to be the same as the original passband excitation of the cover speech, anda synthesis filter is then used to spectrally shape the scaled watermark signal.At the extractor, a bandpass filter is first used to get rid of the out-of-band signal, and an analysis

Keywords： Analysis filter     Linear prediction     Narrowband speech watermarking     Passband excitation replacement    

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CHARACTERISTICS OF HERBIVORY/WOUND-ELICITED ELECTRICAL SIGNAL TRANSDUCTION IN TOMATO

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 2,

Abstract: plant species Arabidopsis has been characterized but the characteristics of electrical signalUnlike those in Arabidopsis, wounding tomato leaves did not cause leaf-to-leaf electrical signalLeaflet wounding also activated electrical signal transduction and jasmonic acid (JA) signaling withinThis work reveals the nature of electrical signal transduction in tomato and emphasizes the key rolesof GLR3.3 and GLR3.5 in electrical signal transduction and JA signaling activation.

Keywords： electrical signal / glutamate receptor-like / herbivory / jasmonic acid / tomato    

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Acoustic fault signal extraction via the line-defect phononic crystals

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1,   Pages 10-10 doi: 10.1007/s11465-021-0666-y

Abstract: Rotating machine fault signal extraction becomes increasingly important in practical engineering applicationsHowever, fault signals with low signal-to-noise ratios (SNRs) are difficult to extract, especially atline-defect phononic crystals (PCs) consisting of periodic acrylic tubes with slit are proposed for weak signalThe effectiveness of weak harmonic and periodic impulse signal detection via line-defect PCs are investigated

Keywords： phononic crystals     line-defect     fault signal extraction     acoustic enhancement    

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A Realization to Enhance the Signal Noise Ratio With Superposition on the Same Phase Signal

Han Xiuting,Wang Jiechun,Jiao Zhenqaing,Gao Fei,Song Yubo

Strategic Study of CAE 2005, Volume 7, Issue 10,   Pages 64-68

Abstract: The method, in which mccltiple similar signals are superposed, can not only decrease the noise in the signal

Keywords： vibrating wave     reflection wave     signal enhancement     software for superposition signal    

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The role of protein kinase C epsilon in neural signal transduction and neurogenic diseases

Yuan CHEN, Qi TIAN

Frontiers of Medicine 2011, Volume 5, Issue 1,   Pages 70-76 doi: 10.1007/s11684-011-0119-9

Abstract: could regulate distinct aspects of neural signal transduction and suggest that the coordinated actionssignal pathway in the developing brain.

Keywords： signal transduction     neurogenic disease    

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Usability perceptions and beliefs about smart thermostats by chi-square test, signal detection theory

Pedro PONCE, Therese PEFFER, Arturo MOLINA

Frontiers in Energy 2019, Volume 13, Issue 3,   Pages 522-538 doi: 10.1007/s11708-018-0562-2

Abstract: This paper proposes the use of a signal detection theory (SDT), fuzzy detection theory (FDT), and chi-square

Keywords： thermostats     perceptions     beliefs     signal detection theory (SDT)     fuzzy signal detection theory (FSDT)     chi-square    

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Performance prediction of switched reluctance generator with time average and small signal models

Jyoti KOUJALAGI, B. UMAMAHESWARI, R. ARUMUGAM

Frontiers in Energy 2013, Volume 7, Issue 1,   Pages 56-68 doi: 10.1007/s11708-012-0216-8

Abstract: mathematical model and predicts the performance of switched reluctance generator with time average and small signalon the switching behaviour, a time average model is obtained to measure the difference between the excitationFinally, to track control voltage and current wave shapes, a small signal model is designed.

Keywords： generator     reluctance     switching model     small signal model     time average model    

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of bradykinin on bradykinin-B2 receptor in rat aortic vascular smooth muscle cells and the involved signal

Wen YAN MD, Min FENG MD, Pei-Hua WANG MD, Dao-Wen WANG MD,

Frontiers of Medicine 2010, Volume 4, Issue 2,   Pages 225-228 doi: 10.1007/s11684-010-0003-z

Abstract: is to study the effect of bradykinin (BK) on bradykinin-B2 receptor as well as the possible involved signalApigenin, PD98059, Akt inhibitor, and LY294002 inhibited up-regulation of B2 receptor induced by BK. (3) Signal

Keywords： bradykinin     vascular smooth muscle cells     signal transduction pathways    

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De-noising of diesel vibration signal using wavelet packet and singular value decomposition

DUAN Li-xiang, ZHANG Lai-bin, WANG Zhao-hui

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 4,   Pages 443-447 doi: 10.1007/s11465-006-0055-6

Abstract: Firstly, the effects of vibration-signal de-noising among Fourier transform, wavelet decomposition andThe SNR (signal-to-noise ratio) of the vibration signals of a diesel cylinder lid is the highest.

Keywords： coefficient     de-noised     cylinder     signal-to-noise     wavelet decomposition    

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Excitation-emission matrix (EEM) fluorescence spectroscopy for characterization of organic matter in

Jinlan Yu, Kang Xiao, Wenchao Xue, Yue-xiao Shen, Jihua Tan, Shuai Liang, Yanfen Wang, Xia Huang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 2, doi: 10.1007/s11783-019-1210-8

Abstract: Three-dimensional excitation-emission matrix (3D-EEM) fluorescence spectroscopy, a powerful tool for

Keywords： excitation-emission matrix (EEM)     dissolved organic matter (DOM)     membrane bioreactor (MBR)     fluorescence    

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Extended stochastic resonance (SR) and its applications in weak mechanical signal processing

Niaoqing HU, Min CHEN, Guojun QIN, Lurui XIA, Zhongyin PAN, Zhanhui FENG,

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 4,   Pages 450-461 doi: 10.1007/s11465-009-0072-3

Abstract: early as possible, one of the most important strategies is to apply more progressive techniques during signalThis paper presents a method based on stochastic resonance (SR) to detect weak fault signal.

Keywords： extended stochastic resonance (SR)     stability analysis of SR     scale transform     weak signal detection     incipient    

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Fundamental frequency and testing mode of complicated elastic clamped-plate vibration

QI Hongyuan, GUAN Yiduo

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 360-364 doi: 10.1007/s11465-008-0084-4

Abstract: analyzing the fundamental frequency; meanwhile, according to hamming testing method of multi-point excitationto the single-point response, and by signal processing technology and its software programming, modal

Keywords： multi-point excitation     rectangle-plate     single-point     processing technology     trigonometric interpolation    

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Title Author Date Type Operation

A Blasting Sources-Based Approach to Inspection of Faults in Dam

Zhou Hougui,Tan Kaiyan

Journal Article

Approximation of structural damping and input excitation force

Mohammad SALAVATI

Journal Article

Simulation Research on PWM Control in Excitation System of Generator

Jia Guixi,Xu Wei,Guo Baoyue,Zhang Chentang

Journal Article

A subband excitation substitute based scheme for narrowband speech watermarking

Wei LIU, Ai-qun HU

Journal Article

CHARACTERISTICS OF HERBIVORY/WOUND-ELICITED ELECTRICAL SIGNAL TRANSDUCTION IN TOMATO

Journal Article

Acoustic fault signal extraction via the line-defect phononic crystals

Journal Article

A Realization to Enhance the Signal Noise Ratio With Superposition on the Same Phase Signal

Han Xiuting,Wang Jiechun,Jiao Zhenqaing,Gao Fei,Song Yubo

Journal Article

The role of protein kinase C epsilon in neural signal transduction and neurogenic diseases

Yuan CHEN, Qi TIAN

Journal Article

Usability perceptions and beliefs about smart thermostats by chi-square test, signal detection theory

Pedro PONCE, Therese PEFFER, Arturo MOLINA

Journal Article

Performance prediction of switched reluctance generator with time average and small signal models

Jyoti KOUJALAGI, B. UMAMAHESWARI, R. ARUMUGAM

Journal Article

of bradykinin on bradykinin-B2 receptor in rat aortic vascular smooth muscle cells and the involved signal

Wen YAN MD, Min FENG MD, Pei-Hua WANG MD, Dao-Wen WANG MD,

Journal Article

De-noising of diesel vibration signal using wavelet packet and singular value decomposition

DUAN Li-xiang, ZHANG Lai-bin, WANG Zhao-hui

Journal Article

Excitation-emission matrix (EEM) fluorescence spectroscopy for characterization of organic matter in

Jinlan Yu, Kang Xiao, Wenchao Xue, Yue-xiao Shen, Jihua Tan, Shuai Liang, Yanfen Wang, Xia Huang

Journal Article

Extended stochastic resonance (SR) and its applications in weak mechanical signal processing

Niaoqing HU, Min CHEN, Guojun QIN, Lurui XIA, Zhongyin PAN, Zhanhui FENG,

Journal Article

Fundamental frequency and testing mode of complicated elastic clamped-plate vibration

QI Hongyuan, GUAN Yiduo

Journal Article