中文摘要：

Sargent改进的Powell方法是曲线拟合中的一种重要方法。本文利用这种方法针对蕴藻浜特大桥沉降中的实测数据给出了五种模型下的沉降预测，这些模型包括双曲线斜率倒数模型、VanderVeen指数模型、宇都一马指数模型、龚帕兹模型、以及波松曲线模型，并发现这种方法对波松旋回模型和灰色系统模型适用性不强。

英文摘要：

Sargent＇s improved Powell method is an important method in curve fitting. In this paper by using Sargent＇ s improved Powell method we predict of settlement of the Yunzaobinte bridge on five models, whieh include hyperbola slope inverse model, Vander Veen power model, Yuduyima power model, Gomportz model. Poisson curve model, and we find that this method is not suitable for Poisson circle method and grey model.