What is XGBoost? XGBoost, also known as Extreme gradient boosting, is an implementation...
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Boosting: Adboost(自适应增强算法)What is Boosting? Boosting is an ensemble learning method that combines a set of weak l...
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Bagging(裝袋算法)What is bagging? Bagging, also known as bootstrap aggregation, is the ensemble learning...
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AARRR ModelUnderstanding AARRR Model What is AARRR Model? Pirate Metrics—a term coined by venture ...
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费米估算（Fermi Estimate）What is Fermi Estimate? In physics or engineering education, a Fermi problem, Fermi qui...
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Machine Learning: Decision TreeUnderstanding Decision Trees What are decision trees? Decision tree is a powerful machi...
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数据库：Mysql索引在该文章中，我会介绍索引在Mysql中的运用。针对于索引的学习更多集中在概念上的理解，因为索引的使用语法并不难。 Topics: What is index? How ind...
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Text MiningWhen modeling text corpora and other collections of discrete data. The goal is to find ...
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Hard Questions: SQLThere are three questions that can be considered the hardest ones in Leetcode because t...
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Statistics Fundamentals: Continuous Distributions 2
Agenda F-Distribution Uniform Distribution Exponential Distribution F-Distribution What...
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Questions about Consecutive Numbers in MySQL
When writing queries based on business needs, we are very likely to create some queries...
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Statistics Fundamentals: Continuous DistributionsAgenda Normal Distribution Central Limit Theorem Distributions and Hypothesis Tests Con...
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Statistics Fundamentals in Python: Univariate Discrete DistributionsFramework Univariate distributions can be divided into discrete distributions, where th...
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Evaluation of ClassifiersBuilding a classifier could be straightforward and easy, but evaluating the performance...
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The use of Recursion in MySQLAn Introduction to Recursion in MySQL In some situations, we probably need to draw upon...
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Machine Learning: Classification 2A quick review on logsitc regressionLogistic regression tries to model the relationship...
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Machine learning: ClassificationWhat is Classification?Linear regression assumes that the reponse variable is quantitat...
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Pivoting Fully Explained Using Python and MySQL
When we need to reshape dataframe such that the rearranged dataframe can satisfy the ne...
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transform Verus fit_trasnformThe difference between transform and fit_transform For those exposed to machine learnin...
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Using Python to Play with SQLAn intensive summer semester ends that gets me overwhlemed with a considerable number o...