Collaborative filtering recommender algorithm for integrating item category and contextual information;

A collaborative filtering recommendation algorithm based on item category similarity;

Based on the survey results in the past twenty years, this paper described and analyzed,with a focus on the number of children wanted and sex preference, the transition of the fertility desires among residents both in rural and urban areas.

This paper reviews sex preference studies in China in recent years with respect to the causes, manifestations, mea surements, consequences and solutions of sex preference in China, indicating the weakness of the existing research and the implications for future research.

Sex preference, as an indispensable of fertility desire, reflects parents expectation of sexcomposition of children, and exerts great influence on people s fertility behavior.

Research on Suburb Residents Gender Preference in Reproduction;

The sex ratio at birth reveals the gender preference of the people in a certain region.

By using the analytic framework of rational choice institutionalism and seeing the recruiting companies as a rational actor of a system level,we could find that the gender preference of recruiting companies is produced both by the cognitive structure of organizations and by the statutes without efficacy.