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Ch14. The Matrix Equation Ax=b

Posted on 2021-01-12 | In Linear_Algebra |

\(A\mathbf{x}\) : Product of A and x

The linear combination of the columns of \(A\) using the corresponding entries in \(\mathbf{X} \mbox{ as weights}\) → x 벡터 엔트리가 가중치

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Ch13. Vector Equations

Posted on 2021-01-12 | In Linear_Algebra |

Vectors in \(\mathbb{R}^2\) → 실수 2차원 공간
\(\mathbf{u} = \left[\begin{matrix}3 \\ -1 \\\end{matrix}\right], \mathbf{v} = \left[\begin{matrix}0.2 \\ 0.3 \\\end{matrix}\right], \mathbf{u} = \left[\begin{matrix}w_1 \\ w_2 \\\end{matrix}\right]\)
\(\vec{u} = (3, -1), \vec{v} = (0.2, 0.3), \vec{w} = (w_1, w_2)\)

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Ch12. Row Reduction and Echelon Forms

Posted on 2021-01-12 | In Linear_Algebra |

A leading Entry of row : the LEFTMOST nonzero entry.

Echelon Form

  1. All nonzero rows are above any rows of all zeros
  2. Each leading entry of a row is in column to the right of the leading entry of the row above it
  3. The leading entry in each nonzero row is 1
  4. Each leading 1 is the only nonzero entry in its column
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Ch11. Linear Equations in Linear Algebra

Posted on 2021-01-12 | In Linear_Algebra |

A system of linear equations : A collection of one or more linear equations
Solution Set : The Set of all possible solutions of the linear system
→ Two linear systems are called equivalent if they have the same solution set.

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프로그래머스 크롤링

Posted on 2021-01-12 | In Algorithm |

21년 1월부터 연구실에선 매일 오전 9시 30분부터 한 시간동안 파이썬 알고리즘 문제를 푼다.

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신경망 구조

Posted on 2020-03-26 | In ML/DL |

기본단위 : 뉴런 -> 조합해 복잡한 구조를 이룸

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Loss Function

Posted on 2020-03-19 | In ML/DL |

지도 학습 알고리즘에 반드시 정의되어야 함 목적, 비용, 에너지 함수 등이라고도 불림 - 에너지, 코스트 등 다양한 표현에 따라 영문 표기명이 달라짐

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tensorflow

Posted on 2020-03-17 | In ML/DL |

import tensorflow as tf

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Decision Tree

Posted on 2020-03-11 | In ML/DL |

장점 : 해석력 > 모델의 정확성 이외에도 활용성 ( 메세지 ) :: 결과에 대한 풀이 (연속형 - 범주형 등의 형태에 대한 범용성 높음)

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SVM

Posted on 2020-03-10 | In ML/DL |

정확한 분포를 찾을 수 없을 때 > lda 를 적용하기 힘들 때 - 선형관계가 아닌 경우

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Eunbin Park

Eunbin Park

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