The evaluation indexes of municipal sewage treatment technology were quantified,and the decision matrix was standardized in the range of complied with the principle of rewarding good and punishing bad.

This paper presents a constrained multiobjective optimization method by integrating a Pareto genetic algorithm with dominated penalty concept.

Therefore it is clearly justified that for languages,spoken by many or by few,strong or weak,there is no distinction between superiority and inferiority.

The methods and measures of decreasing the dilution factor in mining are elaborated, from three aspects such as enhancing levels of cognition and establishing management systems, improving technical work, and setting the system of rewards and penalties.