The concept of a 0-distributive poset is introduced. It is shown that a section semicomplemented poset is distributive if and only if it is 0-distributive. It is also proved that every pseudocomplemented poset is 0-distributive. Further, 0-distributive posets are characterized in terms of their ideal lattices.

The paper took Guang’an City in Sichuan Province of China as a research region, and it built an evaluation index system based on 14 indices according to four criteria, namely, ecological background, structure, benefits, stress. Delphi algorithm entropy weight (a combination subjective objective methods) were used calculate the value each index, ideal point model was value. grade classified, pri...

In Yoshida [11], a method to find ideal points and boundary slopes from an ideal triangulation was introduced. But the method only gives a necessary condition which the valuation corresponding to an ideal point satisfies. We give a simple sufficient condition for the existence of the corresponding ideal points.

An important predictor of historical sound change, functional load, fails to capture insights from speech perception. Building on ideal observer models of word recognition, we devise a new definition of functional load that incorporates both a priori expectedness and perceptual information. We explore this new measure with a simple model and find that it outperforms tra-