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含蜡原油双结构参数模型参数回归存在不稳定性,基于触变性参数分组逐步确定法,采用最小二乘原理建立了触变性参数的回归模型.引入稳定性较好的自适应差分进化算法优化回归模型,并针对研究问题的特殊性,对该算法的初始化操作加以改进.在改进的自适应差分进化算法下,待回归触变性参数的回归结果存在随机跳动现象.通过分析回归结果,提出阶跃剪切率实验与恒剪切率实验相结合的触变性测定实验方法,有效解决了双结构参数模型参数回归结果的不稳定问题.“,”The parameter regression for double-structural-parameters model of waxy crude oil was unstable. Based on the grouped progressive determination method of thixotropic parameters, the regression model of thixotropic parameters was established according to the principle of least square. Then, self-adaptive differential evolution algorithm with good stability was introduced to optimize the regression model. Furthermore, the initialization operation of this algorithm is improved to deal with the particularity of the problem. In the improved self-adaptive differential evolution algorithm, the phenomenon of random fluctuation occurs in the regression results of thixotropic parameters. Finally, a new experimental method of thixotropy measurement which combines step-shear rate experiment with constant-shear rate experiment was proposed based on the analysis of regression results. And thus, the instability of parameter regression results for double-structural-parameters model is effectively solved.