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With the advancement of technology and digital transformation, understanding and enhancing students’ emotional experiences are key concerns for educators and policymakers. In this study, 2 000 manually labeled review data were first used to train three machine learning models. The trained SVM model was then used to automatically label 76 000 review data. These labeled datasets were subsequently used to train a Convolutional Neural Network (CNN) model. The CNN model converged successfully after 10 iterations and achieved an accuracy of 94.96% on the validation set, significantly outperforming the SVM model. The results show that combining traditional machine learning with deep learning methods can effectively improve the accuracy of sentiment analysis. This provides data support for optimizing educational strategies.
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随着科技发展和数字化转型,如何理解和提升学生的情感体验是教育工作者和政策制定者关注的重点。首先对2 000条人工标注的评论数据使用三种机器学习模型进行训练,利用已训练支持向量机(SVM)模型对76 000条评论数据进行自动标注,并使用这些标注数据集训练卷积神经网络(CNN)模型。CNN模型在10次迭代后成功收敛,并在验证集上取得94.96%的准确率,显著优于SVM模型。结果显示,结合传统机器学习与深度学习的方法可有效提高情感分析的准确性,为教育策略优化提供数据支持。
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田茗瑶(2002—),女,河北正定人,研究方向为自然语言处理与情感分析;
陈洋(2004—),男,江苏扬州人,研究方向为自然语言处理与情感分析。
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| 原句 | 我们要开线上课程啦 |
| 分词后 | 我们要开线上课程啦 |
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Jieba分词示例
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| 原句 | 我们要开线上课程啦 |
| 分词后 | 我们要开线上课程啦 |
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| 分类器 | 准确率 | 召回率 | F1分数 |
| 朴素贝叶斯 | 0.86 | 0.85 | 0.83 |
| 支持向量机 | 0.91 | 0.91 | 0.91 |
| 随机森林 | 0.90 | 0.91 | 0.90 |
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不同分类模型的实验结果
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| 分类器 | 准确率 | 召回率 | F1分数 |
| 朴素贝叶斯 | 0.86 | 0.85 | 0.83 |
| 支持向量机 | 0.91 | 0.91 | 0.91 |
| 随机森林 | 0.90 | 0.91 | 0.90 |
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| 批量大小 | 准确率/% |
| 学习率= 0.001 | 学习率= 0.01 | 学习率= 0.1 |
| 32 | 91.55 | 91.11 | 91.45 |
| 64 | 91.65 | 90.89 | 90.57 |
| 128 | 91.14 | 91.26 | 91.51 |
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模型超参数组合的验证集准确率
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| 批量大小 | 准确率/% |
| 学习率= 0.001 | 学习率= 0.01 | 学习率= 0.1 |
| 32 | 91.55 | 91.11 | 91.45 |
| 64 | 91.65 | 90.89 | 90.57 |
| 128 | 91.14 | 91.26 | 91.51 |
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| 模型 | 准确率 | 召回率 | F1分数 |
| SVM | 0.91 | 0.91 | 0.91 |
| CNN | 0.95 | 0.94 | 0.94 |
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模型性能对照
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| 模型 | 准确率 | 召回率 | F1分数 |
| SVM | 0.91 | 0.91 | 0.91 |
| CNN | 0.95 | 0.94 | 0.94 |
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