Being an existing "systematic fact," what significance do folk norms have toward legal methods? To answer this question,this author examines the possible contribution folk law may make to the methodology of legal researches.

Calculation of single-zone productivity contribution in a commingled producing well by multi-methylnaphthalene parameters:a case of a heavy oil reservoir,QHD32-6 oilfield;

Calculating the productivity contribution of single zone in commingled producing wells using ultraviolet spectrum technique.

Based on the research of multitudinous scholars,this article analyses the choice of marketing alliance partner from the partner compatibility and the partner contribution ability the two big aspects mainly.

In the case of the non-uniform evaluation criterion,the relatively similar approach of the air route analysis and the deviation of the result due to the great proportion of subjective factors,this article proposes an air route benefit analysis method based on the contribution ability and growth ability of the air route.