By analyzing Q cluster and characteristic factor matrix, some basic types of coastal zones and their distribution were found by selecting seven characteristic factors in twenty-six districts of the coastal area in China.

The Principle of Eigenfactor Metrics and its Empirical Research

Eigenfactor and Journal Evaluation

This paper takes impact factor,5-year impact factor and eigenfactor as the original evaluation indicators for the evaluation on humanities and social science journals,analyzes the indicators by using factor analysis method,and considers the impact of these three indicators on journal ranking according to internal data structure to achieve a quantitative evaluation on journals.

The enhancement comprises: key evolution algorithm,characterization factor matrix,and the key distribution and update algorithm.

Based on the data of leaching test and pour water extraction test by pressure,in this paper the absorption and migration behaviors of some characteristic contaminants are discussed and the environmental capacity of Chengdu Clay,related to some heavy metals such as Pb~2+ and Cr~6+,is calculated,and their accumulating levels in a certain number of years in the clay are predicted.