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hxf0223 · Aug 28, 2024 · 0224e6e · 0224e6e
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diff --git a/_posts/2024-08-16-RANSAC.md b/_posts/2024-08-16-RANSAC.md
@@ -1,7 +1,7 @@
 ---
 title: 随机一致性抽样算法（RANSAC）
 date: 2024-08-16 +0800 # 2022-01-01 13:14:15 +0800 只写日期也行；不写秒也行；这样也行 2022-03-09T00:55:42+08:00
-categories: [算法]
+categories: [algorithm]
 tags: [c++, algorithm]      # TAG names should always be lowercase
 
 # 以下默认false

diff --git a/_posts/2024-08-26-density-algrithm-knn.md b/_posts/2024-08-26-density-algrithm-knn.md
@@ -1,7 +1,7 @@
 ---
 title: 聚类算法（密度）：基于 nano-flann
 date: 2024-08-26 +0800 # 2022-01-01 13:14:15 +0800 只写日期也行；不写秒也行；这样也行 2022-03-09T00:55:42+08:00
-categories: [算法]
+categories: [algorithm]
 tags: [algorithm, c++]      # TAG names should always be lowercase
 
 # 以下默认false

diff --git a/_posts/2024-08-28-dsp-filter-butterworth-and-chebyshev.md b/_posts/2024-08-28-dsp-filter-butterworth-and-chebyshev.md
@@ -0,0 +1,14 @@
+---
+title: 信号处理资料：Butterworth 和 Chebyshev 滤波器
+date: 2024-08-28 +0800 # 2022-01-01 13:14:15 +0800 只写日期也行；不写秒也行；这样也行 2022-03-09T00:55:42+08:00
+categories: [algorithm]
+tags: [c++, algorithm]      # TAG names should always be lowercase
+
+# 以下默认false
+math: true
+mermaid: true
+# pin: true
+---
+
+* [Digital Signal Processing](https://exstrom.com/journal/sigproc/dsigproc.html)
+* [github -- related sources](https://github.com/adis300/filter-c)