-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
100 changed files
with
391,122 additions
and
237 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
|
@@ -82,6 +82,7 @@ git config --global user.name "lmj01" | |
git config --global user.email "[email protected]" | ||
git config --global color.ui auto 增强命令输出的可读性 | ||
git config --global init.defaultBranch main // 更改默认分支git2.28支持 | ||
git config --local user.name | ||
``` | ||
|
||
### git ssh | ||
|
@@ -143,6 +144,8 @@ pox.xml merge=ours | |
git checkout branch-with-history 切换到带有历史记录的分支中 | ||
git checkout -b XXX 新建本地分支XXX | ||
git reset --hard commit-id 回滚分支XXX上的某个提交点 | ||
git reset --soft HEAD^ 撤销上一个提交,回到staging状态 | ||
git reset --soft HEAD~2 撤销多个提交 | ||
``` | ||
此时代码就是某个提交点的,就可以修改了 | ||
|
||
|
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,72 @@ | ||
# Linear Algebra | ||
|
||
线性代数 | ||
|
||
- [基](https://www.douban.com/note/774496194/) | ||
|
||
## 域 | ||
|
||
## 矩阵 | ||
|
||
<details> | ||
<summary>特征值与特征向量</summary> | ||
|
||
### 特征值与特征向量 | ||
|
||
矩阵与向量相乘会产生另外一个向量,对于某些特定矩阵,存在一些向量,相乘后得到的向量方向不改变,此类向量称为给定矩阵的特征向量,而变换后的向量的缩放值被定义为与该特征向量对应的特征值。 | ||
|
||
$A\vec{v}=\lambda \vec{v}, \lambda \text{是特征向量}\vec{v}\text{对应的特征值}$ | ||
|
||
特征向量只能仅适应于方阵。特征向量所构成的空间(包含0向量)称为特征空间。 | ||
|
||
如果方阵可以写成下来式子,称为可对角化矩阵 | ||
|
||
$$ | ||
A=PDP^{-1} \newline | ||
D=\begin{pmatrix} | ||
\lambda{1} & 0 & \cdots & 0 \newline | ||
0 & \lambda{2} & \cdots & 0 \newline | ||
\vdots & \vdots & \ddots & \vdots \newline | ||
0 & 0 & \cdots & \lambda{n} \newline | ||
\end{pmatrix} \newline | ||
D\text{是以特征值作为对角元素的对角矩阵}, P\text{是特征向量堆叠在一起的矩阵} | ||
$$ | ||
|
||
$\text{矩阵等于其自身的转置称为对称矩阵}, A=A^{T}$ | ||
|
||
$\text{矩阵的逆等于其自身的转置称为正交矩阵}, A^{-1}=A^{T} or A^{T}A=I$ | ||
|
||
有很多关于特征值和特征向量的性质,比如:仅具有实数特征值,始终可对角化,具有正交特征向量。由于对称矩阵的的特征向量相互正交,对角化矩阵A中的矩阵P为正交矩阵,常常说任何对称矩阵都是正交对角化的。 | ||
|
||
$A=PDP^{-1}=PDP^{T}$ | ||
|
||
非对称方阵时,可能有复数的特征值。这就是其局限性,就需要奇异值分解了。 | ||
|
||
</details> | ||
|
||
### 矩阵分解技术 | ||
|
||
<details> | ||
<summary>特征值与特征向量</summary> | ||
|
||
#### [奇异值分解SVD]() | ||
|
||
[奇异值分解的简单想法](https://mp.weixin.qq.com/s/FwtDCVTiINpzP8tih0tu4w) | ||
|
||
在大数据时代,数据集可以使用二维矩阵表示,有时使用矩阵中所有元素进行计算成本很高,就需要恰当的形式的矩阵方便计算。SVD将任何矩阵分解为三个通用矩阵。 | ||
|
||
$$ | ||
\text{设}A\text{是任意矩形(m,n)的矩阵,可以证明}A^{T}A和AA^{T}\text{分别是对称方阵(n,n)和(m,m)}. \newline | ||
(A^{T}A)^{T}=A^{T}(A^{T})^{T}=A^{T}A \newline | ||
(AA^{T})^=(A^{T})^{T}A^{T}=AA^{T} \newline | ||
$$ | ||
|
||
还可以证明它们共享相同的特征值,但特征向量可能不同。根据对称矩阵正交对角化性质,矩阵可分解为 | ||
|
||
$$ | ||
A^{T}A=VDV^{T} \newline | ||
AA^{T}=UDU^{T} \newline | ||
D\text{为特征值的对角矩阵,}V,U\text{为正交矩阵} | ||
$$ | ||
|
||
</details> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
|
@@ -42,7 +42,15 @@ | |
|
||
- [Javascript Playground--邮箱[email protected]](https://playcode.io/) | ||
|
||
### 在线工具 | ||
### 流程图 | ||
|
||
- [图示流程Developer Roadmaps Browse the ever-growing list of up-to-date, community driven roadmaps](https://roadmap.sh/roadmaps) | ||
- [Mermaid Diagramming and charting tool](https://mermaid.js.org/) | ||
- [github](https://github.com/mermaid-js/mermaid) | ||
|
||
- [在线办公软件Univer is an open-source alternative to Google Sheets, Slides, and Docs ](https://github.com/lmj01/univer) | ||
|
||
### 其他 | ||
- [在线计算器及工具](https://www.rapidtables.org/zh-CN/) | ||
- [图形计算器GeoGebra--在线绘制图形](https://www.geogebra.org/graphing?lang=zh_CN) | ||
- [在线编译文件](https://wandbox.org/) | ||
|
@@ -53,8 +61,7 @@ | |
- [This is a online vector graphics editor.](https://skeditor.github.io/) | ||
- [github](https://github.com/skeditor/skeditor) | ||
|
||
### 其他 | ||
|
||
- [文件管理器](http://q-dir.com/) | ||
- [MedPeer应用先进的新闻资讯抓取和分析技术,对用户关心的内容进行深度分类和整理,力求提供及时的生物医药行业资讯,依托MedPeer人工智能翻译系统对国外资讯、文献、报告和视频进行翻译,帮助国内用户轻松理解。编辑器免费,组件收费](https://medpeer.cn/) | ||
- [Design Editor JS SDK Polotno for canvas | Polotno](https://polotno.com/) | ||
- [github](https://github.com/polotno-project) | ||
|
File renamed without changes.
File renamed without changes.
File renamed without changes.
File renamed without changes.
File renamed without changes.
File renamed without changes.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,9 @@ | ||
function colors(specifier) { | ||
var n = specifier.length / 6 | 0, colors = new Array(n), i = 0; | ||
while (i < n) colors[i] = "#" + specifier.slice(i * 6, ++i * 6); | ||
return colors; | ||
} | ||
|
||
var schemeTableau10 = colors("4e79a7f28e2ce1575976b7b259a14fedc949af7aa1ff9da79c755fbab0ab"); | ||
|
||
export { schemeTableau10 as s }; |
Oops, something went wrong.