Abstract:

Based on the relationship between wood properties and its merchantable classification and according to the Chinese GB(National Standard), the WCGS(Wood Classifying and Grading System) was extablished with the description of "Prolog", an AI language.The WCGS not only can classify and grade the wood, index the properties of the wood, but also provide the volume, the price and the value of the log or the sawntimber according to user's required period and required grade, which is very useful for scientific and reasonable management.

Key words: Merchantable wood, Wood classification, Wood grade, Wood properties, Expert system