The extraction technology of changing information of the basic farmland in different spatial resolution satellite images was described,specially the automatically extracting technology based on the spectrum knowledge in the low-resolution images.

In this paper,according to the problems in current knowledge management system(KMS) models and conventional artificial intelligence field,a new knowledge spectrum that can describe structural degree of enterprise s coded knowledge is put forward.

We analyzed the research status of entrepreneurial university in foreign countries from 1990 to 2007 and drew its knowledge mapping.

The knowledge mapping reveals four knowledge clusters concerning entrepreneurial university research: 1) university entrepreneurship and technology transfer, 2) the university-industry-government triple-helix, 3) performance of university-industry innovation and entrepreneurship, and 4) the growth of enterprisers.

Taking the research works on Information Science by the 24 core source journals of SSCI database of ISI Web of Science in the period of 1996 to August 2008 as the research object,This paper attempts to analyzed the research of Information Science by ACA and drew its knowledge mapping.

Learning society in content at least include five knowledge pedigrees,namely philosophical knowledge,political knowledge,practical knowledge,ethical knowledge and aesthetic knowledge.