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Autoregressive Conditional Heteroskedasticity

A statistical measure of the average error between a best fit line and actual data that uses past data to predict future performance. General Autoaggressive Conditional Heteroskedasticity is the most common way of doing this. See also: Fractal Distribution.
References in periodicals archive ?
Pedicles--narrow stem-like structures on the vertebrae that form the walls of the bottom part of the vertebral arch.
The fusion included facet fusion, vertebral arch fusion and vertebral body fusion.
The posterior vertebral arch consists of the pedicles with dense cortices and relatively little intervening spongy bone and laminae which are flattened bones with also relatively dense cortex and less dense cancellous bone (Carter, 2002), (Tan, 2003).