ARCH

(redirected from ovoid arch)
Also found in: Dictionary, Thesaurus, Medical, Encyclopedia.

ARCH

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 ?
The squarish, tapering and ovoid arch forms were determined by using the formula of arch width and depth suggested by Noroozi (Wc/Wm)x(Dc/Dm).3 The arch width was bilaterally measured at two reference points with a standard unmodified vernier caliper (0-150mm by Jing Gong).
According to the results of both methods the ovoid arch form was most prevalent while squarish arch form was least prevalent.
Nojima et al10 used tapered, square and ovoid arch form templates to evaluate the arch forms of angle class I, II and III cases in both Japanese and Caucasian samples.