LEADER 00897nam0-22003131i-450- 001 990003063140403321 010 $a0-19-877348-X 035 $a000306314 035 $aFED01000306314 035 $a(Aleph)000306314FED01 035 $a000306314 100 $a20000920d1993----km-y0itay50------ba 101 0 $aeng 102 $aIT 200 1 $a<>Economics of Monetary Integration$fPaul De Grauwe 205 $arepr. 210 $aOxford$cOxford University Press$d1993 215 $aXII, 191 p.$d21 cm 610 0 $aSistema Monetario Europeo 610 0 $aUnione monetaria europea$aAnalisi costi-benefici 676 $aO/1.2430 700 1$aGrauwe,$bPaul : de$0121390 801 0$aIT$bUNINA$gRICA$2UNIMARC 901 $aBK 912 $a990003063140403321 952 $aO/1.2430 DEG/E$b14099$fSES 959 $aSES 996 $aEconomics of monetary integration$914565 997 $aUNINA LEADER 05447oam 2200661Ia 450 001 9910483952203321 005 20211005234758.0 010 $a981-15-2002-X 024 8 $a10.1007/978-981-15-2 035 $a(OCoLC)1145578308$z(OCoLC)1145314343$z(OCoLC)1151761915$z(OCoLC)1152540357$z(OCoLC)1153159407$z(OCoLC)1153952380$z(OCoLC)1154458126 035 $a(OCoLC)on1145578308 035 $a(MiAaPQ)EBC6131381 035 $a(PPN)243224516 035 $a(CKB)5300000000003502 035 $a(EXLCZ)995300000000003502 100 $a20200321d2020 uy 0 101 0 $aeng 135 $aurun|---aucuu 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aKey technologies of intelligentized welding manufacturing $ewelding arc acoustic sensing and monitoring technology /$fNa Lv, Shanben Chen 210 $aSingapore $cSpringer$d2020 215 $a1 online resource (129 pages) 300 $a8 Microphone Array Technology in Welding Dynamic Process Monitoring 311 08$aPrint version: Chen, Shanben. Key Technologies of Intelligentized Welding Manufacturing : Welding Arc Acoustic Sensing and Monitoring Technology. Singapore : Springer, ©2020 9789811520013 320 $aIncludes bibliographical references. 327 $aIntro -- Acknowledgements -- Contents -- 1 Multi-source Information of Arc Welding Dynamic Process -- 1.1 Introduction -- 1.2 Acoustic Signal of Welding Dynamic Process -- 1.3 Classification of Welding Acoustic Signal -- 1.4 Feature and Application Value of Arc Sound Signal -- 1.5 Influencing Factor of Arc Sound Signal -- 1.6 Microphone Array Measurement of Arc Sound -- 2 Acoustic Mechanism and Arc Sound Source Modeling for GTAW Welding -- 2.1 Basic Arc Sound Source Model -- 2.1.1 Weld Pool Oscillation Model of Arc Sound -- 2.1.2 Analysis and Validation of Sound Source for GTAW 327 $a2.1.3 Influence of Welding Parameters on Arc Sound Signal During Dynamic Welding -- 3 Feature Extraction and Analysis of Arc Sound Signal with Dynamic Welding Process -- 3.1 Welding Operation System Setup -- 3.2 Arc Sound Signal Preprocessing Method -- 3.2.1 Removal of DC Component -- 3.2.2 Noise-Removal Process -- 3.2.3 Region of Interest (ROI) Selected -- 3.2.4 Window Function Addition -- 3.2.5 Analysis of Arc Sound Signal in Short Time Domain -- 3.2.6 Frequency-Domain Analysis of Arc Sound Signal -- 3.2.7 Time-Frequency Analysis of Arc Sound Signal 327 $a3.2.8 Relationship Between Sound Feature and Penetration of Weld Pool -- 4 Channel Generation Mechanism and Modeling for Arc Sound Signal During GTAW -- 4.1 Generation Mechanism of Arc Sound Channel -- 4.2 Arc Sound Channel Modeling Based on Cepstrum Coefficient -- 4.2.1 A Mathematical Model Based on Cepstrum Analysis -- 4.2.2 Cepstrum Coefficients Model of the Arc Sound Signal -- 4.3 Arc Sound Channel Modeling Based on Linear Predictive Analysis -- 5 Prediction Model Establishment Based on Arc Sound Feature Array -- 5.1 Welding Penetration Recognition Analysis Using Arc Sound Signal 327 $a5.2 Prediction Model Using BPAdaBoost Neural Network for GATW Welding -- 5.3 Classification Model Using Hidden Markov Model -- 5.3.1 Wavelet Analysis -- 5.3.2 Modeling Based on Hidden Markov Model -- 5.3.3 Comparing with Traditional Model -- 6 Relationship Modeling Between Weld Pool Collapse and Welding Penetration Based on Analyzing Arc Sound Features -- 6.1 Welding Experimental Design and Arc Sound Signal Collection -- 6.2 Processing of Arc Sound Signal for Weld Pool Collapse -- 6.2.1 De-DC Component Processing -- 6.2.2 Denoising 327 $a6.3 Accuracy Verification Test for Prediction Model Based on Arc Sound Feature -- 6.3.1 The Piecewise Linear Fitting for Arc Length -- 6.3.2 Validation of Arc Length Prediction Model -- 6.4 Prediction Experiment of Welding Pool Collapse -- 7 Real-Time Control of Welding Penetration via Arc Sound Signal for GTAW Welding -- 7.1 Design of Real-Time Processing Software for Arc Sound Signal During GTAW Welding -- 7.2 Arc Height Tracking Control Experiment via Arc Sound Signal of GTAW Welding -- 7.3 Welding Penetration Control Experiment via Arc Sound Signal of GTAW Welding 330 $aThis book gives a full picture of the welding quality real-time control via arc sound information. This book presents all aspects of acoustic signal research during the welding dynamic process from the last five years. It also offers valuable and practical strategies for achieving the real-time control of welding quality via arc sound signal. Researchers, scientists, and engineers who have interests in intelligent welding could acquire intensive view and experiment procedures from the book. 606 $aWelding 606 $aWelding industry 606 $aWelding$2fast$3(OCoLC)fst01173568 606 $aWelding industry$2fast$3(OCoLC)fst01173614 615 0$aWelding. 615 0$aWelding industry. 615 7$aWelding. 615 7$aWelding industry. 676 $a671.5/2 700 $aLv$b Na$0926035 701 $aChen$b Shanben$0915532 801 0$bEBLCP 801 1$bEBLCP 801 2$bGW5XE 801 2$bYDX 801 2$bLQU 801 2$bOCLCQ 801 2$bOCLCF 801 2$bUKAHL 801 2$bUKMGB 801 2$bORU 906 $aBOOK 912 $a9910483952203321 996 $aKey technologies of intelligentized welding manufacturing$92079089 997 $aUNINA