Expansion model的用法和样例：
例句
- Experiment results show that good retrieval effectiveness can be achieved by adjusting the parameter of the Bayesian networks used in our model.
实验结果表明通过进一步调节扩展模型中的参数，可以获得良好的检索效果。 - In this paper, the application of the sand cone model in supply chains is discussed and new analysis thoughts are provided in the research of the compositeness of supply chain.
摘要通过将沙堆模型应用于供应链，提出供应链竞争力扩展模型，为供应链竞争力问题提出新的分析思路。
