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In this work, the factors affecting residual life of injecting water pipeline were analyzed. Ten parameters were screened from 9 injecting water pipelines in Shengli oilfield by applying the grey correlation method, including penetrability, porosity, net thickness, oil saturation, water cut, average daily production, and injection rate, amount cementing front spacer, amount sand-carrying agent and...
Based on the KRC model as transformation thermodynamics, a new model of the phase equilibrium temperature of X80 pipeline steel has been established by C++ under the hot deformation conditions, on which analyzing the influences of true strain, deformed temperature and strain rate. The results given by the model have good agreements with the measured value. It shows that the model can have a good accuracy...
In this paper, a new mathematical morphology wavelet denoising method which based on separating defect points was put forward for the actual needs of the in-service pipeline inspection. This method uses wavelet maximum value algorithm to extract the edge of defect area. It use the single-output mode of BP neural network in pattern recognition by choosing small length, invariant moment, grey energy...
Aiming to the features of the load variation of gas pipeline, it is suggested Fuzzy Logic system and RBF Nerve Network Based on Artificial Immune Algorithm is used to predict the load of gas pipeline. The fuzzy logic system is applied to predict the load error and the error variation rate. Then, the RBF Nerve Network Based on Artificial Immune Algorithm is used to predict the load of gas pipeline...
Support Vector Machines (SVM) represents a new and very promising approach to pattern recognition based on small dataset. The approach is systematic and properly motivated by Statistical Learning Theory (SLT). Training involves separating the classes with a surface that maximizes the margin between them. An interesting property of this approach is that it is an approximate implementation of Structural...
Deformation resistance of X80 pipeline steel was researched by experiment with the Gleeble-3500. Establishing the model of dislocation density of X80 pipeline steel through the corresponding relationship between dislocation density and deformation resistance, then combining with the thermodynamic model of X80 pipeline steel which is based on the KRC thermodynamics model in order to analysis the effect...
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