2021年数学建模国赛

很抱歉，根据提供的引用内容，我没有找到关于2021年数学建模国赛的任何信息。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *3* [【2021 数学建模国赛】B题：空气质量预报二次建模 1 赛后总结与分析](https://blog.csdn.net/weixin_43935696/article/details/120877648)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
- *2* [2021年数学建模国赛C题问题四及模型检验](https://blog.csdn.net/qq_35712832/article/details/123290613)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
[ .reference_list ]