Abstract: Aiming at the problem of subjective perceptual bias in the process of product design, this
paper presents a user cognitive model and quantification model for product modeling style. Firstly,
the Significance analysis of the feature elements in the product modeling style is analyzed, and the
user cognitive model of the convergence of the characteristic elements to the linear contours is
explored in combination with the concept of “style curve” and the characteristic line. Then, based on
the feature integration, general cognitive model, that is, with the continuous deepening of user
awareness, product modeling style in the user’s mind will gradually converge to the product
characteristics of the linear contours. Finally, a quantitative model of linear contours of feature
elements is proposed based on the concept of MATLAB correlation coefficient, which provides
objective and rational decision-making basis for design activities. In this paper, the eye movement
tracking experiment of CRH380 series of high speed train in China is carried out to verify the
feasibility of the theoretical model.

Key words: product modeling style, cognitive pattern, eye tracking, feature element, linear contours