本文对残差具有异方差性的传递函数模型提出了一种新的模型——条件异方差传递函数模型，并对建立此类模型的条件和拟合及预测效果进行了研究。
In this paper, a new model-transmissibility function model with conditional heteroscedasticity is proposed, and its conditions as well as the fitting and forecasting effect have been studied.
说明文章提出的方法对计算大直径单桩的荷载与沉降曲线具有较好的适用性，利用桩身和桩端的三参数荷载传递函数模型和迭代算法分析大直径单桩的承载性状是可行的。
Therefore, it is feasible to analyze the bearing capacity of a large diameter single pile by three parameters load transfer function model of pile body and pile top and numerical iteration method.
说明文章提出的方法对计算大直径单桩的荷载与沉降曲线具有较好的适用性，利用桩身和桩端的三参数荷载传递函数模型和迭代算法分析大直径单桩的承载性状是可行的。
Therefore, it is feasible to analyze the bearing capacity of a large diameter single pile by three parameters load transfer function model of pile body and pile top and numerical iteration method.
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