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Lecture 15 Anomaly detection problem motivation Gaussian distribution Algorithm Density estimation Training set : \({x^{(1)},x^{(2)},\dots,x^{(m)}}\) 阅读全文
posted @ 2021-12-20 15:52
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编译程序的逻辑结构 编译程序逻辑结构上至少包含两大阶段 分析（Analysis）阶段 理解源程序，挖掘源程序的语义 综合（Synthesis）阶段 生成与源程序语义上等价的目标程序 编译程序的前端、中端和后端 前端（Front End） 实现主要的分析任务 通常以第一次生成中间代码为标志 后端（Ba 阅读全文
posted @ 2021-12-16 19:27
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Lecture8 Neural NetWork：Representation Non-linear hypotheses Neural NetWork \(a_i^{(j)}\) = "activation" of unit i in layer j \(\Theta^{(j)}\) = matri 阅读全文
posted @ 2021-12-16 15:15
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Lecture7 Regularization Overfitting : If we have too many features,the learned hypothesis may fit the training set very well,but fail to generalize to 阅读全文
posted @ 2021-12-16 15:14
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Lecture9 Neural Networks:Learning Cost function Neural Network (Classifification) \(L\) = total no. of layer in network \(S_l\) = no. of units (not co 阅读全文
posted @ 2021-12-16 15:12
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Lecture12 Support Vector Machines Alternative view of logistic regression support vector machine: \[ \underset{\theta}{min}C\sum^m_{i=1}[y^{(i)}cost_1 阅读全文
posted @ 2021-12-16 15:11
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## Matrix Time Limit: 3000MS Memory Limit: 65536K Total Submissions: 34283 Accepted: 12403 Description Given an N*N matrix A, whose elements are eith 阅读全文
posted @ 2021-11-26 09:44
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## D. Nested Segments time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output You are given n segme 阅读全文
posted @ 2021-11-26 09:43
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## I Hate It Time Limit: 9000/3000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 112144 Accepted Submission(s): 418 阅读全文
posted @ 2021-11-26 09:42
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A Simple Problem with Integers Time Limit: 5000MS Memory Limit: 131072K Total Submissions: 152104 Accepted: 47157 Case Time Limit: 2000MS Description 阅读全文
posted @ 2021-11-26 09:41
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