In the new product concept evaluation stage, the filtration method, which considers relative importance and effect of each factor of the multi-scheme, can be mainly adopted.
在新产品概念开发阶段，主要运用多设想（或方案）加权评分法对新产品设想进行筛选；
2
The investigation reviewed the influence of flocculants to sludge with oil and the factor influenced the sludge flocculation filtration. The best running condition is confirmed through experiment.