Assessment model of water quality risk based on unascertained mathematics theory;

Since the unascertained characteristic of stream sediments system, unascertained mathematics theories are applied to the assessment of heavy metal pollution in stream sediments.

A problem of allowable load of a predominant pollutant for main stream reservoir is preliminarily approached according to the theory of unascertained mathematics,on the basis of unascertained information of river hydrology and water quality.

The un-positive mathematical method was used in a rock physical mechanics test to analyze the test results.

Calculation of water environmental capacity in lake and reservoir based on unascertained number theory;

Qualitative estimation method of equipment life cycle cost based on unascertained number theory;

In this paper, the correspondence K from the real number set R to the subset R of the unascertained number set R has been given here.

The unascertained mathematics analysis method of the measurable results about the dissolved oxygen of water;

The unascertained mathematics was introduced to analyze the representative values of compressive strength of concrete core from cast in-suit pile at the condition of small sampling data.