Therefore,the author of this paper tries to tell librarians how to collect and explore the unpublished information on internet so that they can better serve their readers.

Characteristic information resources development in the Cancer Prevention Center of Affiliated to Zhongshan University;

In order to simplify the problem in regression forecasting,we don t often consider gray information.

Based on some researches of other scholars,the Internet gray information is discussed from the aspects as follows: the definition of the gray information,value analysis and collection of the gray information.

The paper analyzes the Legality of collecting gray information and the illegality of collecting business secret, and puts forward concrete countermeasures and methods to prevent improper information competition activities.

This paper presents the concepts of grey information and information order, and gives the general definition of grey information matrix A(G).

This paper briefly introduces the concept and value of the grey information and, based on this, expounds the whitening process of foreign grey information how to set up perfect grey information system in China and make it be whitened.

Based on Grey System Theory, this thesis attempts to make a comparatively comprehensive study on the grey information in language communication from an informational-pragmatic perspective.

Networked Medical Information Resources Evaluation;

Grey literature —— the other information resource of science and technology;

Management and exploration of internet information resources for art design;

Aimed at the resource information sharing in manufacturing grid (MG),XML is employed to express the information of manufacturing resource.