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Improved Ultrasonic Offshore Oil Pipeline Thickness Accurate Detection Using Hilbert-Huang Transform and Elman Neural Network
Elman neural network Hilbert-Huang transform Feature extraction
2009/7/27
Pipeline flaw detection and safety evaluation are very important because of internal corrosion usually caused by the presence of the water (salty or not), and external damage by anchors or other equip...
Characterization of Nitrogen Compounds in Vacuum Residues by Electrospray Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry
Vacuum residue Structural characterization Nitrogen compound
2009/7/24
The structural characteristics of the components of several vacuum residues from different geological sources (Taching, Sumatra light, Iranian heavy, Arabian mix, and Murban vacuum residues) were inv...