Taking into account the fuzziness in the process of partitioning and grading of water quality condition of lake in arid area,this paper integrated two fuzzy clustering analysis methods,transitive closure method based on fuzzy clustering analysis(TCM) and fuzzy clustering analysis of ISODATA,and one fuzzy clustering recognition method into a composite model of fuzzy clustering and pattern recognit.

Based on the fuzzy diagnosis theory,the fuzzy relation between the effecting factors and the fracturing results is set up.

Based on fuzzy theory,and using information fusion and fuzzy diagnosis technologies,the general principle and method of fuzzy diagnosis of multi targets in multi sensor net are discussed in this paper.

The article used absolute exponent as one of the methods of fuzzy diagnosis to identify and classify hyperspectral images, then evaluated precision of classification result based on pixel level.

The application of fuzzy identification for the innovation types of small business;

A fuzzy identification method to evaluate the paying ability for the loan in enterprise;

Obstacle avoidance algorithm for mobile robot based on fuzzy identification;

The system integrates the fuzzy discernment and comprehensive evaluation method to assess the development level of Guangdong Province in the aspect of shipping modernization.

According to the feature of fuzzy nature in pollution of water environment, we can use fuzzy discernment with different weights to synthetic evaluation of water quality of Ouyanghai Reservoir, and fundamently, it is identical between the result of evaluation and the objective distribution of pollutant source.