翻译我们先用了多元线性回归但是拟合不是很理想我们考虑变量和价格之间并不只有线性关系。所以采用了xgboost来进行与多元线性回归的比对并进行了pso优化

We initially used multiple linear regression, but the fit was not ideal. We recognized that the relationship between variables and price is not only linear. Therefore, we used xgboost for comparison with multiple linear regression and conducted pso optimization.