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Harmonic average/en

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Proceedings Papers

Paper presented at the CORROSION 2008, March 16–20, 2008
Paper Number: NACE-08286
... (LPR), harmonic analysis (HA), and electrochemical noise (EN). Environments include 3 % NaCl solution with and without 10 % diesel, saturated with CO2 at 50°C. Both, LPR and HA techniques had a quick answer, within 7 minutes, however, HA showed big fluctuations although similar trend in the corrosion...
Proceedings Papers

Paper presented at the CORROSION 2003, March 16–20, 2003
Paper Number: NACE-03402
... Symposium, Corrosion 2001). This paper will describe a new approach to EN measurement that permits the determination of average corrosion rate and tendency to localisation using a single electrode. THE METHOD The approach proposed involves a combination of EN measurement coupled with simultaneous...
Proceedings Papers

Paper presented at the CORROSION 2005, April 3–7, 2005
Paper Number: NACE-05359
... that moisture was more likely to accumulate at one than the other. Electrochemical noise (EN), linear polarization resistance (LPR), and harmonic distortion analysis (HDA) are used in combination to monitor the corrosion occurring in the plant. The 100-day corrosion data for the vertical and horizontal sensors...
Proceedings Papers

Paper presented at the The Thirteenth International Offshore and Polar Engineering Conference, May 25–30, 2003
Paper Number: ISOPE-I-03-241
... e e e S t e e e + + + += + + + + (22) 600 400 200 0 Sp ec tra l d en si ty (c m /s )2 * (h ou r) 0.300.250.200.150.100.050.00 Frequency (1/hour) Specified spectrum Spectrum from ARMA model Spectrum calculated from time series generated by ARMA...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-3127
... by filtering in the frequency domain. This clean separation of the higher harmonics demonstrates the successful application of the phase manipulation approach in decomposing harmonic loads on the structure in the experiments. 61 62 63 64 65 66 67 Time (s) 200 0 200 400 M o m en th ar m o n ic s (N m ) First...
Proceedings Papers

Paper presented at the 2000 SEG Annual Meeting, August 6–11, 2000
Paper Number: SEG-2000-2092
... of the Pisarenko harmonic spectral estimator to this special type of ARMA model. Equation (7) can be written in matrix form as follows: Yg =Wg = e ; (8) where Y is the con volution matrix of the signal with en- tries given b y the noisy sequenceY k properly shifted and padded with zeros in order to express...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 27–30, 1987
Paper Number: SPE-16926-MS
... from En indicate incorrect averaging of the differential pressure waveform by the meter. Commercial FFT analysis software converts the time domain data to the frequency domain. The bands of 3 B. J. Davis & S. K. Whitman SPE 16926 pulsation frequencies present at the measurement station, along...
Proceedings Papers

Paper presented at the CORROSION 2004, March 28–April 1, 2004
Paper Number: NACE-04435
... of these galleries that the pitting failure of the 760 mm pipe elbow occurred. In the galleries, pipes carrying both PE and RAS run parallel in close proximity. It was decided to conduct electrochemical noise (EN), linear polarization resistance (LPR) and harmonic distortion analysis (HDA) on both lines in one...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 29–October 2, 2002
Paper Number: SPE-77692-MS
... Polytechnique de Toulouse, October 1979 6. Kazi-Aoual, M.N.: Reconnaissance de Milieux Poreux Saturés en Fluide Peu Compressible par Analyse Harmonique , doctoral thesis, Université Paul Sabatier (Toulouse), July 1981 7. Alami, M.: Reconnaissance de Formations Poreuses Saturées par Analyse Harmonique...
Proceedings Papers

Paper presented at the CORROSION 2006, March 12–16, 2006
Paper Number: NACE-06432
..., electrochemical impedance spectroscopy, harmonic analysis, electrochemical frequency modulation. INTRODUCTION The measurement of electrochemical noise, EN, for the study of corrosion processes is now relatively well-established. In this paper the properties of the technique and the methods of analysis...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 22–25, 1995
Paper Number: SPE-30778-MS
...- Decreasing --11- Harmonic average --e Increasing rContact anglevariation'\ 2010o 0.00 a.. 0.40 o o ';Jl. ~ 8 ~ 0.20 11 EF~ECTS OF CAPILLARY HETEROGENEITY ON SPONTANEOUS IMBIBITION 0.60 0.80 0.70 ~ Harmonic average for H=O -e- H=O.9, Seed=2 -e- Harmonic average for H=O.9, Seed=2 -8- H=O.9, Seed=9 0.50 ~ . en...
Proceedings Papers

Paper presented at the European Petroleum Conference, October 20–22, 1998
Paper Number: SPE-52063-STU
... Conference and Exhibition, Denver, Oct. 7. Urgelli, D.: Modelisation des Ecoulements en Milieu Hberogene avec des maillagesAdaptes : Rapport d'Avancement, Internal report, Institut Fran9ais du Petrole, Dec., 1997. 8. Urgelli, D.: Prise en Compte des Heterogeneites par Prise de Moyenne des Transmisivites sur...
Proceedings Papers

Paper presented at the The Fourteenth International Offshore and Polar Engineering Conference, May 23–28, 2004
Paper Number: ISOPE-I-04-326
... in time 05 x 106 En er gy s pe ct ra l d en sit y Time [s] Fr eq ue nc y [H z] 20 40 60 80 100 120 140 0 0.05 0.1 0.15 0.2 0.25 Figure 4. Wigner-Ville distribution of the freak wave time series computed digital signal, through the Strawberry Tree Digital to Analog (D/A) board installed in the computer...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1992
Paper Number: OTC-6816-MS
...]ll2exp (-i'l'n) in which (ambn - anbm) sin (en -em)] H(ffin,kn; -<Om,-km) (14) +w N N TI 2 = L L [(anam - bnbm) cos (en +em) + n=1 m=1 (ambn + anbm) sin (en +em)] H(Oln,kn; Olm,km) while the sub- and super-harmonic components of the flow potential at second order are given respectively by: N N(fi = L L...
Proceedings Papers

Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-514
... is to take advantage of the recent progress in machine learning to construct a robust yet efficient algorithm. The development can specifi- cally benefit the tidal energy community, aiming to harness en- ergy from location of fast tidal currents. INTRODUCTION Tidal waves are produced by a combination...
Proceedings Papers

Paper presented at the Third ISOPE Ocean Mining Symposium, November 8–10, 1999
Paper Number: ISOPE-M-99-026
.... However,' table ,I b, indicates that both the c~rrentmeters show southerly flow in the first twoensembles, northerly 'flow in the next two ensembles and again'southerly flow in the last en- se,mole. Thps,an inspection ofthe 10day vector averaged currents shows that both the Aanderaa and Potok current...
Proceedings Papers

Paper presented at the CORROSION 2005, April 3–7, 2005
Paper Number: NACE-05637
... that integrate LPR, electrochemical noise (EN) and harmonic distortion analysis (HDA) for measurement of Tafel slope, Stern-Geary relationships and instrument corrosion proportionality constants (B values See Appendix I), electrochemical monitoring offers the potential for online, real-time measurement...
Proceedings Papers

Paper presented at the SPWLA 35th Annual Logging Symposium, June 19–22, 1994
Paper Number: SPWLA-1994-DD
... of resolution for a given technology, such as induction logging. Barber, T.D.and Rosthal, R.A., 1991, Using a multiar- ray induction tool to achieve high-resolution logs with minimum environmental effects, paper SPE 22725 presented in the 66th Annual Society of Petroleum En- gineers Technical Conference...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1150
... to the En-De-LSTM model for training. Finally, the forecasting values are normalized to original values, plus, the final prediction values can be obtained through linear addition of all denormalized values. RESULTS AND ANALYSIS The focus of this research is the tidal level data of the Hong Kong Hydrological...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 24–26, 2018
Paper Number: SPE-194043-STU
... in oil and gas . Ernst &amp;Young LLP , 2017, https://www.ey.com/gl/en/industries/oil---gas/ey-intelligent-automation-in-oil-and-gas ( accessed 08 June 2018 ). Lazareva R.G. , Yakimtsov S.A. , Bespalov A.P. , Akhmetzyanov R.R. , Girfanov R.G. , Denisov O.V. 2016 . Method...

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