For fracture crossing criterion between hydraulic fracture and natural fracture, the hydraulic fracture propagation is generally assumed to be a multiple planar fracture with opening mode.
The value of μ 2 can be calculated from (17) or (18) when it satisfies the "rare crossing" criterion proposed in [24] (V TH >2σ B for a wide-band process); otherwise, it can be estimated by (24).
In the investigation for inclination angle, frictional coefficient of fracture interface, and fracture orientation, hydraulic fracture passed through natural fracture appropriately corresponding to crossing criterion, and thereafter, propagated in a manner suitably consistent with respect to fracture reinitiation angle.
Single-channel transitions were detected by the 50% threshold crossing criterion.
Single-channel currents: Digitized single-channel records of 120-s durations were detected with Fetchan 6.05 (events list) of pCLAMP (Axon) using 50% threshold crossing criterion and analyzed with Intrv5 (Dr. Barry S. Pallotta, University of North Carolina, Chapel Hill, NC; Dr. Janet Fisher, University of South Carolina, Columbia, SC).
The Akaike information criterion (AIC), the Chi-square test, the cross validation criterion, and others are methods used to compare models with different numbers of predictor variables [34].
Cross-over criteria For both juries it should be said that subject-matter came second to the quality of the writing.
Cross-validation criteria of EBK showed satisfactory results validating the reliability of EBK.
The extraction is achieved by minimising a cross correlation criterion and uses a genetic algorithm [49].
Cross-validation criteria showed satisfactory results for EBK interpolation (Table 9).
The DNN was then fine-tuned using stochastic gradient descent (SGD) to optimize the cross entropy criterion.
