It is the human memory system and cognitive characteristics that altogether determine the cognitive ways of the processing of referential choice.

It aims to describe the routine practices that constitute anaphoric repair and account for both the mechanism and process of anaphoric repair and the referential choice in repair sequence.

This dissertation analyzes reference and referential choice in Chinese narrative discourse from four perspectives: a syntactic perspective, a semantic perspective, a pragmatic perspective and a cognitive perspective.

These include theoretical researches and applications of marker-assisted backcrossing, index selection, and best linear unbiased prediction (BLUP) in animal and plant breeding.

Regression and comprehensive selection index analysis were used to study the yield structure of strong heterosis in hybrid wheat according to the result of yield grouping.

By the weight of characters,the index of low nitrogen stress and value at low nitrogen stress,the method for calculating selection index of low nitrogen stress was set up.

The selection index was been made dependent on breeding goats,which needn t determine the economic value of traits selected.

Therefore, stem diameter and leaf number could be considered as two principal selection indexs for breeding new varieties, evaluating yield and select.

Based on the investigation,the article focuses on the exploration of the relationship between the index and process,suggests the related indexes that are primarily assessed during the different selection phases,and constructs the supplier selection model of the relationship between the supplier selection index and selection process in multinational companies\' purchase in China.