کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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417362 | 681489 | 2007 | 19 صفحه PDF | دانلود رایگان |
Feedforward multi-layer perceptrons (MLPs) are valuable modeling tools when considered as non-linear regression technique. MLPs are employed to estimate a priori unknown relationships between a response variable and regressors. Their estimates can serve as a basis for statistical inference. Hypotheses are more substantial and appropriate than those within reach of more traditional methods. This is due to the ability to extract complex non-linear interactive effects. The methodology of drawing valid statistical inference by MLPs in the context of spatially dependent heteroscedastic data is provided. The approach is data-driven and computationally feasible. The appropriateness and suitability of the procedure is demonstrated with an artificial data set and a practical application. Three-layer feedforward networks are applied to approximate the data-generating process. In context of spatially correlated residuals, a suitable statistic is given to test if a specific input variable is predictive of the response variable. Finally, sub-sampling techniques are adopted to arrive at valid statistical conclusions.
Journal: Computational Statistics & Data Analysis - Volume 51, Issue 5, 1 February 2007, Pages 2701–2719