cubic parabola造句

• The stress - strain curve of new - old concrete and hprrc , are suggested to be modeled by two sections : the ascending section of the stress - strain curve is simulated by cubic parabola equation and the descending section is simulated by rational fraction , where the theoretical value is in good agreement with the test value . the research results also provide a theoretical basis of earlier stage for improving crack resistance of new - old concrete interface
  新一老硅及hprrc应力一应变全曲线建议采用两段式拟合:上升段采用三次抛物线方程模拟，下降段采用有理分式模拟，理论值与试验结果吻合较好。该研究成果为新老混凝土结合面抗裂能力的提高提供了前期的理论基础。