The present status and the existed problem in Chinese grape wine quality grading system construction were illustrated and the basic models of international grape wine quality grading system were introduced.

In order to make tungoiltree industry and tung oil quality grade standardization,so as to meet the export requirements,it is necessary to establish the Tung Oil Quality Grade,which includes tu.

Applying binomial distribution of probability sets up a mathematical model of partial building project quality grade.

Quality grade of unit building project must be guarranteed by that of partioced building project,on the other hand,the latter was determined by that of the partioned building project it had.

Models of equivalent force and equivalent mass about planar linkage

By the decomposition of the heat transfer behavior and the calculation of the equivalent mass, this paper presents the dynamic nodal model of the Bimorph thermal actuator and uses the commonly used circuit simulation software, SPICE as the simulation platform of the model.

This paper carries out elementary research on equivalent mass of non-ideal spring and reaches some important results: non-ideal spring, mef = m/3; non-ideal and non-linear spring, mef = m/3 ~ m/2; serial spring, mef = α2m1 + (α2 +α + 1)m2 / 3.