然后，针对模型中存在的参数选取问题进行了分析。

Then, how to select parameters in the model is analyzed.

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针对模型的特点设计了求解模型的特殊P SO算法。

Specific particle swarm optimization (PSO) algorithm is designed to solve the model.

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针对模型药物的性质，选择了硫酸钙为稀释剂，氢化蓖麻油为粘合剂。

Based on the property of the model drug, we selected Calcium Sulfate as dilute, Hydrogenated Castor Oil as binder.

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