Then, according to mathematics equation of the model, an equation of internal returnsratio and daily production of single well and well depth was derived.
然后，根据模型的数学方程推导出关于内部收益率与单井日产量和井深的方程式。
2
Therefore, according to the risk-income symmetrical principle, the corporate bond's returnsratio should be higher than the non-risk interest rate at the same time.
根据风险收益对称原则，企业债券的收益率应该高于同一时期的无风险利率。
3
It shows negative correlation between internal returnsratio and well depth, and positive correlation between interval returnsratio and daily production of single well.