[翻译] 提升树算法的介绍(Introduction to Boosted Trees) 1. 有监督学习的要素 XGBoost 适用于有监督学习问题.在此类问题中,我们使用多特征的训练数据集 \(x_i\) 去预测一个目标变量 \(y_i\) .在专门学习树模型前,我们先回顾一下有监督学习的基本要素. Elements of Supervised Learning XGBoost is used for supervised learning problems, where we use th…
Lecture 3(part 1) Divide and conquer 1. the general paradim of algrithm as bellow: 1. divide the problem into subproblems; 2. conqure each subproblems recrusively; 3. combine solution 2. Some typical problem (part 1) the matrix mutiplication(strassen…
Problem Description The Czech Technical University years of its existence . Some of the university buildings are old as well. And the navigation in old buildings can sometimes be a little bit tricky, because of strange long corridors that fork and jo…
pid=3572">Task Schedule Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 3412 Accepted Submission(s): 1197 Problem Description Our geometry princess XMM has stoped her study in computation…
1.What does the analogy “AI is the new electricity” refer to? (B) A. Through the “smart grid”, AI is delivering a new wave of electricity. B. Similar to electricity starting about 100 years ago, AI is transforming multiple industries. C. AI is power…