It solved the problem of the conflict between teacher and grade and the problem of incorporate-class class by introducing group deleting experiment,solved the problem of normal incorporate-class class and problem of teacher s request of t.

In the algorithm,an idea that all maximum independent sets are formed straightway by deleting experiment is put forward and realized,that condition of maximum independent is satisfied gradually by doing time after time delete experiments.

In the closed circle DNA algorithm,an idea that complementary sets of vertex covering are formed straightway by delete experiment is put forward and realized,which has design of the algorithm inimitable and novel.

To realize filtering algorithm of SAT problem using DNA computing model,the data structure of 2n dimension vector is adopted to do DNA encoding,which represents a valuation of SAT problem,and delete experiment of closed circle DNA computing model can just complete selection of initial valuations to obtain feasible solutions of SAT problem.

Difference of atrazine sorption by soils in batch experiments;

Batch experiment is an easy and fast way to measure sorption of the herbicide in soil.

A series of batch experiments were carried out to determine the degradation velocity of herbicide atrazine in different soil samples, and the correlation between the soil properties and degradation parameter was statistically analyzed.

The main influence factors of autotrophic ammonia removal were studied in batch tests by use of the biofilm from the reactors.