ZhangZhihuiAAA - 博客园

Dimensional Modeling - Is it a good practice to use surrogate key in dimension tables?

摘要： Yes, using surrogate keys in dimension tables is widely considered a best practice in data warehouse and dimensional modeling. Here's why: ✅ Why Use S 阅读全文

posted @ 2025-08-05 22:03 ZhangZhihuiAAA 阅读(11) 评论(0) 推荐(0)

Dimensional Modeling - Table Naming Convention Policy

摘要： 📌 Purpose This document defines a standardized naming convention for all database tables used in the data warehouse or data mart. The goal is to impr 阅读全文

posted @ 2025-08-05 15:42 ZhangZhihuiAAA 阅读(28) 评论(0) 推荐(0)

Machine Learning - AdaBoost

摘要： stump Amount of Say 阅读全文

posted @ 2025-07-25 19:49 ZhangZhihuiAAA 阅读(4) 评论(0) 推荐(0)

Machine Learning - Stochastic Gradient Descent

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posted @ 2025-07-25 13:55 ZhangZhihuiAAA 阅读(6) 评论(0) 推荐(0)

Machine Learning - The Chain Rule

摘要： ... 阅读全文

posted @ 2025-07-24 08:42 ZhangZhihuiAAA 阅读(8) 评论(0) 推荐(0)

Machine Learning - Random Forests Part 2: Missing Data and Sample Clustering

摘要： proximity matrix 阅读全文

posted @ 2025-07-23 17:35 ZhangZhihuiAAA 阅读(6) 评论(0) 推荐(0)

Machine Learning - Random Forests Part 1: Build and Evaluate Random Forests

摘要： bagging Out-Of-Bag-Error 阅读全文

posted @ 2025-07-23 15:33 ZhangZhihuiAAA 阅读(9) 评论(0) 推荐(0)

Machine Learning - Classification Tree in Python

摘要： Import Modules: import numpy as np import pandas as pd import matplotlib.pyplot as plt from sklearn.model_selection import train_test_split from sklea 阅读全文

posted @ 2025-07-21 21:55 ZhangZhihuiAAA 阅读(10) 评论(0) 推荐(0)

JupyterLab - Change font size of code cell

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posted @ 2025-07-21 21:43 ZhangZhihuiAAA 阅读(6) 评论(0) 推荐(0)

Machine Learning - One-Hot, Label, Target, K-Fold Target Encoding

摘要： (1 + 0 + 0) / 3 (1 + 1 + 0) / 3 阅读全文

posted @ 2025-07-21 17:42 ZhangZhihuiAAA 阅读(6) 评论(0) 推荐(0)

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