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机器学习

Machine Learning

课程介绍 Course Introduction

学分:3 | 先修课:概率论与数理统计、线性代数 | 学期:第5学期

机器学习是数据科学的核心应用课程,涵盖监督学习、无监督学习与强化学习三大范式。主要内容包括线性回归、逻辑回归、决策树、支持向量机、神经网络、聚类、降维与集成学习等算法。课程结合Scikit-learn、TensorFlow或PyTorch框架,训练学生从数据预处理、特征工程、模型训练到评估部署的完整流程,理解过拟合、正则化、交叉验证等关键概念。

Machine Learning is a core applied course in data science, covering supervised, unsupervised, and reinforcement learning paradigms. Topics include linear regression, logistic regression, decision trees, support vector machines, neural networks, clustering, dimensionality reduction, and ensemble methods. Using Scikit-learn, TensorFlow, or PyTorch, students train through the complete workflow from data preprocessing and feature engineering to model training, evaluation, and deployment, understanding key concepts like overfitting, regularization, and cross-validation.

大作业 Final Project

作业标题:房价预测模型构建

基于真实房屋交易数据集,完成特征工程、模型选择、调参与评估,对比多种算法表现,最终部署预测模型并撰写技术报告,分析模型可解释性。

Based on a real housing transaction dataset, complete feature engineering, model selection, tuning, and evaluation, compare multiple algorithms, deploy the prediction model, and write a technical report analyzing model interpretability.

实施步骤 Implementation Steps

📋 示例:做一个完整的房价预测系统,比如预测北京各区域的二手房价格。你需要爬取几千条真实房源数据,做特征工程(面积、楼层、学区等),用XGBoost或随机森林训练模型,评估MAE并分析特征重要性。
步骤 1
数据收集与预处理
收集MNIST手写数字数据集,进行数据清洗、标准化和划分
产出:预处理后数据集
步骤 2
模型选择与设计
选择神经网络结构,设计卷积层、池化层、全连接层
产出:模型设计文档
步骤 3
模型训练
使用PyTorch/TensorFlow实现并训练模型,调优超参数
产出:训练好的模型
步骤 4
模型评估
在测试集上评估模型准确率、精确率、召回率等指标
产出:评估报告
步骤 5
文档提交
整理代码注释和实验报告
产出:最终提交材料

Steps

Step 1
Data Collection & Preprocessing
Collect MNIST dataset, perform cleaning and normalization
Deliverable: Preprocessed Dataset
Step 2
Model Selection & Design
Choose neural network architecture, design conv/pooling layers
Deliverable: Model Design Doc
Step 3
Model Training
Implement and train using PyTorch/TensorFlow
Deliverable: Trained Model
Step 4
Model Evaluation
Evaluate accuracy, precision, recall on test set
Deliverable: Evaluation Report
Step 5
Documentation
Prepare code comments and experimental report
Deliverable: Final Submission

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