improved BP-NN model 改进的BP神经网络模型
To raise capacity that virtual surgical simulation system deals with real work, this article introduces BP NN model instead of finite element model, and realizes real-time biomechanical response.
为了提高虚拟手术仿真系统进行实际作业的能力，提出了以BP神经网络模型来代替有限元模型，实现实时的生物力学响应。
A mixed NN model is constructed using BP algorithm improved with dynamic learning rate.
利用动态学习率改进BP算法，建立了混合神经网络模型。
To further improve the forecast accuracy of this model, and reduce its forecast error, I also improve the BP NN in this article.
为了进一步提高模型预测的准确度，减小预测误差，本文还对BP神经网络进行改进。
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