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content/computer_sci/data_structure_and_algorithm/graph/spanning_tree.md
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tags: tags:
- graph - graph
- data-structure - data-structure
date: 2024-02-28
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# What is Spanning Tree? # What is Spanning Tree?

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content/computer_sci/data_structure_and_algorithm/graph/topological_sorting.md
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tags: tags:
- data-structure - data-structure
- graph - graph
date: 2024-02-28
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# What is Topological Sorting # What is Topological Sorting

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content/computer_sci/data_structure_and_algorithm/string/KMP.md
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- algorithm - algorithm
- string - string
- string-search - string-search
date: 2024-02-28
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# Abstract # Abstract

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content/computer_sci/data_structure_and_algorithm/tree/fenwick_tree.md
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- data-structure - data-structure
- basic - basic
- algorithm - algorithm
date: 2024-02-28
--- ---

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content/computer_sci/data_structure_and_algorithm/tree/segment_tree.md
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@ -3,6 +3,7 @@ title: Segment Tree
tags: tags:
- data-structure - data-structure
- tree - tree
date: 2024-02-28
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# Overview # Overview

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content/computer_sci/deep_learning_and_machine_learning/Evaluation/time_series_forecasting.md
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- deep-learning - deep-learning
- evaluation - evaluation
- time-series-dealing - time-series-dealing
date: 2024-02-28
--- ---
![](computer_sci/deep_learning_and_machine_learning/Evaluation/attachments/Pasted%20image%2020230526162839.png) ![](computer_sci/deep_learning_and_machine_learning/Evaluation/attachments/Pasted%20image%2020230526162839.png)

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content/computer_sci/deep_learning_and_machine_learning/Famous_Model/DeepAR.md
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- deep-learning - deep-learning
- model - model
- time-series-dealing - time-series-dealing
date: 2024-02-28
--- ---
DeepAR, an autoregressive recurrent network developed by Amazon, is the first model that could natively work on multiple time-series. It's a milestone in time-series community. DeepAR, an autoregressive recurrent network developed by Amazon, is the first model that could natively work on multiple time-series. It's a milestone in time-series community.

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content/computer_sci/deep_learning_and_machine_learning/LLM/LLM_MOC.md
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- deep-learning - deep-learning
- LLM - LLM
- NLP - NLP
date: 2024-02-28
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# Training # Training

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content/computer_sci/deep_learning_and_machine_learning/LLM/basic/llm_hyperparameter.md
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- LLM - LLM
- deep-learning - deep-learning
- basic - basic
date: 2024-02-28
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# LLM Temperature # LLM Temperature

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content/computer_sci/deep_learning_and_machine_learning/LLM/train/RLHF.md
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- deep-learning - deep-learning
- RLHF - RLHF
- LLM-training-method - LLM-training-method
date: 2024-02-28
--- ---

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content/computer_sci/deep_learning_and_machine_learning/LLM/train/steps.md
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tags: tags:
- LLM - LLM
- deep-learning - deep-learning
date: 2024-02-28
--- ---
训练大型语言模型（LLM）的方法通常涉及以下步骤： 训练大型语言模型（LLM）的方法通常涉及以下步骤：

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content/computer_sci/deep_learning_and_machine_learning/LLM/train/train_LLM.md
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- LLM - LLM
- LLM-training-method - LLM-training-method
- deep-learning - deep-learning
date: 2024-02-28
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# Find a dataset # Find a dataset

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content/computer_sci/deep_learning_and_machine_learning/Model_interpretability/SHAP.md
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- deep-learning - deep-learning
- interpretability - interpretability
- algorithm - algorithm
date: 2024-02-28
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SHAP is the most popular model-agnostic technique that is used to explain predictions. SHAP stands for **SH**apley **A**dditive ex**P**lanations SHAP is the most popular model-agnostic technique that is used to explain predictions. SHAP stands for **SH**apley **A**dditive ex**P**lanations

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content/computer_sci/deep_learning_and_machine_learning/Trick/DTW.md
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- metrics - metrics
- time-series-dealing - time-series-dealing
- evalution - evalution
date: 2024-02-28
--- ---
![](computer_sci/deep_learning_and_machine_learning/Trick/attachments/Pasted%20image%2020230526164724.png) ![](computer_sci/deep_learning_and_machine_learning/Trick/attachments/Pasted%20image%2020230526164724.png)

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content/computer_sci/deep_learning_and_machine_learning/Trick/quantile_loss.md
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- loss-function - loss-function
- deep-learning - deep-learning
- deep-learning-math - deep-learning-math
date: 2024-02-28
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在大多数现实世界的预测问题中，我们的预测所带来的不确定性具有重要价值。相较于仅仅提供点估计，了解预测范围能够显著改善许多商业应用的决策过程。**Quantile loss**就是为例帮助我们了解预测范围的loss function。 在大多数现实世界的预测问题中，我们的预测所带来的不确定性具有重要价值。相较于仅仅提供点估计，了解预测范围能够显著改善许多商业应用的决策过程。**Quantile loss**就是为例帮助我们了解预测范围的loss function。

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content/computer_sci/deep_learning_and_machine_learning/deep_learning/LSTM.md
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- deep-learning - deep-learning
- time-series-dealing - time-series-dealing
- basic - basic
date: 2024-02-28
--- ---
> [!quote] > [!quote]

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content/computer_sci/deep_learning_and_machine_learning/deep_learning/XGBoost.md
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@ -3,6 +3,7 @@ title: XGBoost
tags: tags:
- deep-learning - deep-learning
- ensemble-learning - ensemble-learning
date: 2024-02-28
--- ---

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content/computer_sci/deep_learning_and_machine_learning/deep_learning/attention.md
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@ -3,6 +3,7 @@ title: "⭐Attenion"
tags: tags:
- deep-learning - deep-learning
- attention - attention
date: 2024-02-28
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# Self-Attention # Self-Attention

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content/computer_sci/deep_learning_and_machine_learning/deep_learning/deep_neural_decision_forests.md
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title: Deep Neural Decision Forests title: Deep Neural Decision Forests
tags: tags:
- deep-learning - deep-learning
date: 2024-02-28
--- ---
# Background # Background

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content/computer_sci/deep_learning_and_machine_learning/deep_learning/transformer.md
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@ -3,6 +3,7 @@ title: "Transformer"
tags: tags:
- deep-learning - deep-learning
- attention - attention
date: 2024-02-28
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> [!info] > [!info]

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content/computer_sci/deep_learning_and_machine_learning/deep_learning_MOC.md
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@ -3,6 +3,7 @@ title: Deep Learning - MOC
tags: tags:
- MOC - MOC
- deep-learning - deep-learning
date: 2024-02-28
--- ---
# Tech Explanation # Tech Explanation

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content/computer_sci/deep_learning_and_machine_learning/machine_learning/SVM.md
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title: Support Vector Machine title: Support Vector Machine
tags: tags:
- machine-learning - machine-learning
date: 2024-02-28
--- ---
# Overview # Overview

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content/computer_sci/hardware/MCU/different_programming_interfaces.md
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title: Different Programming Interfaces title: Different Programming Interfaces
tags: tags:
- hardware - hardware
date: 2024-02-28
--- ---
# What is programming interfaces in MCU # What is programming interfaces in MCU

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content/data_sci/basic/relationship.md
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@ -3,6 +3,7 @@ title: Independence & Correlation
tags: tags:
- math - math
- statistics - statistics
date: 2024-02-28
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# Independent # Independent

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content/data_sci/stochastic_process/stationary_process.md
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- math - math
- stochastic-process - stochastic-process
- signal-processing - signal-processing
date: 2024-02-28
--- ---
# Reference # Reference

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content/data_sci/visualization/visual_style/the_economist_style.md
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@ -3,6 +3,7 @@ title: The economist style graph
tags: tags:
- data-visual - data-visual
- statistics - statistics
date: 2024-02-28
--- ---
# Reference # Reference

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content/data_sci/visualization/visual_tool/Tableau/tableau_learn_basic.md
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- tableau - tableau
- data-visual - data-visual
- data - data
date: 2024-02-28
--- ---
# What is Tableau # What is Tableau

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content/math/Statistics/Basic/Quantile.md
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- math - math
- statistics - statistics
- basic - basic
date: 2024-02-28
--- ---
**分位数**（英语：Quantile），亦称**分位点**，是指用分割点（cut point）将一个随机变量的概率分布范围分为几个具有相同概率的连续区间。分割点的数量比划分出的区间少1，例如3个分割点能分出4个区间。 **分位数**（英语：Quantile），亦称**分位点**，是指用分割点（cut point）将一个随机变量的概率分布范围分为几个具有相同概率的连续区间。分割点的数量比划分出的区间少1，例如3个分割点能分出4个区间。

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content/math/discrete_mathematics/set_theory/cantor_expansion/cantor_expansion.md
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- algorithm - algorithm
- discrete-mathematics - discrete-mathematics
- set-theory - set-theory
date: 2024-02-28
--- ---

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content/math/optimization_problem/Quadratic_Programming.md
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- math - math
- optimize - optimize
- optimization - optimization
date: 2024-02-28
--- ---
# Why I write this note? # Why I write this note?

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content/math/real_analysis/cauchy_principal_value.md
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@ -3,6 +3,7 @@ title: Cauchy Principal Value
tags: tags:
- math - math
- real-analysis - real-analysis
date: 2024-02-28
--- ---
# Notation # Notation

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content/photography/Skills/howToShowPolaroid.md
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- Polaroid - Polaroid
- photography - photography
- skill - skill
date: 2024-02-28
--- ---
* [宝丽来翻拍9宫格](photography/aesthetic/Polaroid/Polaroid_showcase.md) * [宝丽来翻拍9宫格](photography/aesthetic/Polaroid/Polaroid_showcase.md)

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content/photography/Skills/moodboard.md
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@ -3,6 +3,7 @@ title: How to use Moodboard
tags: tags:
- photography - photography
- skill - skill
date: 2024-02-28
--- ---
# Overview # Overview

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content/photography/Story/rainy_evening_hiking_Polaroid.md
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- Polaroid - Polaroid
- story - story
- film - film
date: 2024-02-28
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# Hiking # Hiking

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content/photography/aesthetic/Landscape/Sea/Fujifilm_Blue_by_小红书_Philips谢骏.md
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- photography - photography
- landscape - landscape
- photography - photography
date: 2024-02-28
--- ---
![](photography/aesthetic/Landscape/Sea/attachments/Pasted%20image%2020230420014349.png) ![](photography/aesthetic/Landscape/Sea/attachments/Pasted%20image%2020230420014349.png)

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content/photography/aesthetic/Landscape/Sea/Sea_MOC.md
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@ -5,6 +5,7 @@ tags:
- sea - sea
- photography - photography
- aesthetic - aesthetic
date: 2024-02-28
--- ---
* [Fujifilm Blue🌊, 小红书-Philips谢骏](photography/aesthetic/Landscape/Sea/Fujifilm_Blue_by_小红书_Philips谢骏.md) * [Fujifilm Blue🌊, 小红书-Philips谢骏](photography/aesthetic/Landscape/Sea/Fujifilm_Blue_by_小红书_Philips谢骏.md)

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content/photography/aesthetic/Landscape/Sea/豊島_Instagram_shiifoncake.md
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@ -5,6 +5,7 @@ tags:
- sea - sea
- landscape - landscape
- aesthetic - aesthetic
date: 2024-02-28
--- ---
![](photography/aesthetic/Landscape/Sea/attachments/shiifoncake_338949220_771246770941652_287141902256013940_n.jpg) ![](photography/aesthetic/Landscape/Sea/attachments/shiifoncake_338949220_771246770941652_287141902256013940_n.jpg)

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content/photography/aesthetic/Polaroid/Polaroid_showcase.md
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- photography - photography
- Polaroid - Polaroid
- share - share
date: 2024-02-28
--- ---

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content/photography/aesthetic/Portrait/From Korean MV Todays_Mod.md
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- korean - korean
- cute - cute
- 摘抄 - 摘抄
date: 2024-02-28
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Credits to [MV - CHEEZE(치즈) _ Today's Mood(오늘의 기분)](https://www.youtube.com/watch?v=zRq_DlEzygk), Credits to [MV - CHEEZE(치즈) _ Today's Mood(오늘의 기분)](https://www.youtube.com/watch?v=zRq_DlEzygk),

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content/photography/aesthetic/Style/Style_MOC.md
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- style - style
- share - share
- MOC - MOC
date: 2024-02-28
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* [🌅Warmth - Nguan](photography/aesthetic/Style/Warmth_by_Nguan.md) * [🌅Warmth - Nguan](photography/aesthetic/Style/Warmth_by_Nguan.md)

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content/photography/basic/MTF_Curve.md
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- photography - photography
- basic - basic
- lens - lens
date: 2024-02-28
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有很多因素影响lens performance： 有很多因素影响lens performance：

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content/photography/cameras_Research/Polaroid/Polaroid.md
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- photography - photography
- MOC - MOC
- polaroid - polaroid
date: 2024-02-28
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# Polaroid Background # Polaroid Background

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content/photography/mood_board/Sea_20230428/idea.md
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- photography - photography
- moodboard - moodboard
- idea - idea
date: 2024-02-28
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# [Fujifilm_Blue_by_小红书_Philips谢骏](photography/aesthetic/Landscape/Sea/Fujifilm_Blue_by_小红书_Philips谢骏.md) # [Fujifilm_Blue_by_小红书_Philips谢骏](photography/aesthetic/Landscape/Sea/Fujifilm_Blue_by_小红书_Philips谢骏.md)

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content/photography/photography_MOC.md
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@ -3,6 +3,7 @@ title: "Photography - MOC"
tags: tags:
- MOC - MOC
- photography - photography
date: 2024-02-28
--- ---
# 🌊Photo Portfolio # 🌊Photo Portfolio

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content/physics/electromagnetism/Basic/Electric_units.md
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- basic - basic
- physics - physics
- electric - electric
date: 2024-02-28
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# Electrical impedance # Electrical impedance

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content/physics/electromagnetism/maxwells_equation.md
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- physics - physics
- electromagnetism - electromagnetism
- nuclear-level-knowledge - nuclear-level-knowledge
date: 2024-02-28
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# Equation # Equation

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content/physics/electromagnetism/q_factor.md
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- electric - electric
- electromagnetism - electromagnetism
- basic - basic
date: 2024-02-28
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# Explanation # Explanation

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content/physics/electromagnetism/resonant_circuit.md
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@ -3,6 +3,7 @@ title: Resonant circuit
tags: tags:
- physics - physics
- electric - electric
date: 2024-02-28
--- ---
以RLC串联电路为例 以RLC串联电路为例

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content/physics/optical/optical_abberation.md
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- optical - optical
- photography - photography
- basic - basic
date: 2024-02-28
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# What is optical aberration # What is optical aberration

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content/physics/wave/doppler_effect.md
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- physics - physics
- basic - basic
- wave - wave
date: 2024-02-28
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多普勒效应（**Doppler effect**）是波源和观察者有相对运动时，观察者接受到波的频率与波源发出的频率并不相同的现象。 多普勒效应（**Doppler effect**）是波源和观察者有相对运动时，观察者接受到波的频率与波源发出的频率并不相同的现象。

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content/plan/exhibition/whisky_l.md
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@ -3,6 +3,7 @@ title: Whisky L
tags: tags:
- dream - dream
- exhibition - exhibition
date: 2024-02-28
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# What is whisky L # What is whisky L

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content/plan/life.md
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title: Life List🚀 title: Life List🚀
tags: tags:
- dream - dream
date: 2024-02-28
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# Exhibition # Exhibition

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content/report/2023.04.16 天线测试.md
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---
对天线进行测距能力的测试 title: 2023.04.16 天线测试
tags:
- antenna
date: 2023-04-16
---
# 背景 # 背景

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content/research_career/UWB_about/UWB_signal_generate.md
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tags: tags:
- UWB - UWB
- signal-processing - signal-processing
date: 2024-02-28
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# Actual Signals which find use in UWB systems # Actual Signals which find use in UWB systems

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content/research_career/UWB_about/attachments/receiving_signal.md
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content/research_career/UWB_about/report/UWB_signal_generate.md
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@ -3,6 +3,7 @@ title: How to generate UWB signal
tags: tags:
- UWB - UWB
- signal-processing - signal-processing
date: 2024-02-28
--- ---
# Actual Signals which find use in UWB systems # Actual Signals which find use in UWB systems

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content/research_career/UWB_about/report/VNA_research.md
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title: Vector Network Analysis - Review title: Vector Network Analysis - Review
tags: tags:
- UWB - UWB
date: 2024-02-28
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# Brief Introduction # Brief Introduction

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content/research_career/UWB_about/report/flight_time_calculation.md
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- signal-processing - signal-processing
- VNA - VNA
- UWB - UWB
date: 2024-02-28
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content/research_career/UWB_about/report/基于高频信号大趋势包络提取后的信号关键点提取.md
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@ -3,6 +3,7 @@ title: Detect Signal Impulse Point by High Frequency Signal Envelope Method
tags: tags:
- report - report
- envelope - envelope
date: 2024-02-28
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# 问题 # 问题

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content/research_career/device/VNA_set_instruction.md
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- hardware - hardware
- VNA - VNA
- UWB - UWB
date: 2024-02-28
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# Step by Step (Simple Overview) # Step by Step (Simple Overview)

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content/research_career/papers_read/2024_winter_holiday/PI_overview.md
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tags: tags:
- pressure-injury - pressure-injury
- overview - overview
date: 2024-02-28
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# A systematic review of pressure injury 压疮综述 # A systematic review of pressure injury 压疮综述

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content/research_career/papers_read/2024_winter_holiday/papers_read_about_pressure_injury.md
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@ -3,6 +3,7 @@ title: 关于压疮（pressure injury）相关的文献阅读
tags: tags:
- papers - papers
- pressure-injury - pressure-injury
date: 2024-02-28
--- ---

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content/research_career/papers_read/papers_2023_10.md
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tags: tags:
- papers - papers
- research-about - research-about
date: 2024-02-28
--- ---
# Measurements of UWB through-the-wall propagation using spectrum analyzer and the Hilbert transform # Measurements of UWB through-the-wall propagation using spectrum analyzer and the Hilbert transform

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content/research_career/papers_read/papers_2023_11.md
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title: Papers Read in 2023.11 title: Papers Read in 2023.11
date: 2024-02-28
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# DESIGNING A UWB GENERATOR AND ANTENNA FOR CWD RADAR # DESIGNING A UWB GENERATOR AND ANTENNA FOR CWD RADAR

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content/research_career/plan/Next_work_plan/2023_12.md
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title: Dec. 2023 Work Plan title: Dec. 2023 Work Plan
tags: tags:
- plan - plan
date: 2024-02-28
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Task: Task:

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content/signal_processing/PSD_estimation/PSD_estimation.md
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tags: tags:
- signal-processing - signal-processing
- statistics - statistics
date: 2024-02-28
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[Power spectral density estimation](signal_processing/basic_knowledge/concept/Spectral_density.md)(PSDE, or SDE)，功率谱估计是随机信号处理的重要研究内容之一 [Power spectral density estimation](signal_processing/basic_knowledge/concept/Spectral_density.md)(PSDE, or SDE)，功率谱估计是随机信号处理的重要研究内容之一

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content/signal_processing/basic_knowledge/FT/fourier_transform.md
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tags: tags:
- math - math
- signal-processing - signal-processing
date: 2024-02-28
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# Almost Fourier Transform # Almost Fourier Transform

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content/signal_processing/basic_knowledge/concept/FM_vs_AM.md
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tags: tags:
- signal - signal
- signal-processing - signal-processing
date: 2024-02-28
--- ---
# Reference # Reference

1
content/signal_processing/basic_knowledge/concept/SWR.md
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@ -4,6 +4,7 @@ tags:
- signal-processing - signal-processing
- VNA - VNA
- antenna - antenna
date: 2024-02-28
--- ---
天线的驻波比（Standing Wave Ratio，SWR）是用于**衡量天线与传输线或电路之间的匹配性能的一个关键参数**。SWR是一个无单位的值，通常表示为正数，它用于表示天线的输入阻抗与传输线或电路的特性阻抗之间的比率。SWR的值越低，表示天线与传输线的匹配越好，能更有效地传输能量。 天线的驻波比（Standing Wave Ratio，SWR）是用于**衡量天线与传输线或电路之间的匹配性能的一个关键参数**。SWR是一个无单位的值，通常表示为正数，它用于表示天线的输入阻抗与传输线或电路的特性阻抗之间的比率。SWR的值越低，表示天线与传输线的匹配越好，能更有效地传输能量。

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content/signal_processing/basic_knowledge/concept/scattering_parameters.md
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@ -4,6 +4,7 @@ tags:
- signal-processing - signal-processing
- VNA - VNA
- devices - devices
date: 2024-02-28
--- ---
S参数（Scattering Parameters，散射参数）是用于描述射频和微波电路中信号传输和散射特性的一组参数。S参数响应是指S参数随频率变化的响应或值。这些参数用于描述电路中信号的传输、反射和散射情况，通常以矩阵的形式表示。S参数通常有四个值：S11、S12、S21和S22，分别表示反射系数和传输系数。 S参数（Scattering Parameters，散射参数）是用于描述射频和微波电路中信号传输和散射特性的一组参数。S参数响应是指S参数随频率变化的响应或值。这些参数用于描述电路中信号的传输、反射和散射情况，通常以矩阵的形式表示。S参数通常有四个值：S11、S12、S21和S22，分别表示反射系数和传输系数。

1
content/signal_processing/basic_knowledge/concept/smith_graph.md
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@ -3,6 +3,7 @@ title: Smith Graph
tags: tags:
- signal-processing - signal-processing
- VNA - VNA
date: 2024-02-28
--- ---
Smith图，又称为Smith圆图或史密斯图，是一种常用于射频（RF）和微波工程中的图形工具，用于可视化和分析电路、天线和传输线的阻抗匹配和传输线特性的工具。Smith图以19世纪初美国工程师Philip H. Smith的名字命名，他对电路匹配问题作出了重要贡献。 Smith图，又称为Smith圆图或史密斯图，是一种常用于射频（RF）和微波工程中的图形工具，用于可视化和分析电路、天线和传输线的阻抗匹配和传输线特性的工具。Smith图以19世纪初美国工程师Philip H. Smith的名字命名，他对电路匹配问题作出了重要贡献。

1
content/signal_processing/basic_knowledge/random_signal_basic.md
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@ -3,6 +3,7 @@ title: Random Signal Basic
tags: tags:
- signal-processing - signal-processing
- math - math
date: 2024-02-28
--- ---
# What is Random Signals # What is Random Signals

1
content/signal_processing/basic_knowledge/stability_of_discrete_system.md
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@ -4,6 +4,7 @@ tags:
- signal-processing - signal-processing
- basic - basic
- system - system
date: 2024-02-28
--- ---
# 离散系统稳定性判别（因果系统） # 离散系统稳定性判别（因果系统）

1
content/signal_processing/device_and_components/SRD.md
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@ -4,6 +4,7 @@ tags:
- signal - signal
- ciruit-componets - ciruit-componets
- UWB - UWB
date: 2024-02-28
--- ---
阶跃恢复二极管（Step Recovery Diode，SRD）是一种特殊类型的二极管，通常用于高频、脉冲和微波应用中。它的特殊结构和工作原理使其能够产生非常快速的电压和电流变化，因此在信号产生、调制和混频等电子电路中有广泛的应用。以下是关于SRD的详细介绍： 阶跃恢复二极管（Step Recovery Diode，SRD）是一种特殊类型的二极管，通常用于高频、脉冲和微波应用中。它的特殊结构和工作原理使其能够产生非常快速的电压和电流变化，因此在信号产生、调制和混频等电子电路中有广泛的应用。以下是关于SRD的详细介绍：

1
content/signal_processing/device_and_components/VNA_learn.md
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@ -3,6 +3,7 @@ title: Learn VNA in practical way
tags: tags:
- devices - devices
- signal-processing - signal-processing
date: 2024-02-28
--- ---
# Background # Background

1
content/signal_processing/device_and_components/cable/AWG.md
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@ -3,6 +3,7 @@ title: American Wire Gauge
tags: tags:
- cable - cable
- protocols - protocols
date: 2024-02-28
--- ---
AWG是American Wire Gauge的缩写，它是一种用于表示电线和电缆导线直径大小的标准。AWG标准是在美国制定的，常用于美国、加拿大和其他一些国家。 AWG是American Wire Gauge的缩写，它是一种用于表示电线和电缆导线直径大小的标准。AWG标准是在美国制定的，常用于美国、加拿大和其他一些国家。

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content/signal_processing/device_and_components/cable/cable.md
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@ -4,6 +4,7 @@ tags:
- signal - signal
- equipment - equipment
- devices - devices
date: 2024-02-28
--- ---
# Structure # Structure

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content/signal_processing/device_and_components/cable/skin_effect.md
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@ -5,6 +5,7 @@ tags:
- equipment - equipment
- signal - signal
- signal-processing - signal-processing
date: 2024-02-28
--- ---
# Simple review # Simple review

1
content/signal_processing/device_and_components/op_amp.md
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@ -2,6 +2,7 @@
title: Operational Amplifier title: Operational Amplifier
tags: tags:
- signal - signal
date: 2024-02-28
--- ---
运算放大器 运算放大器

1
content/signal_processing/device_and_components/quality_control_certified/qcc.md
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@ -4,6 +4,7 @@ tags:
- devices - devices
- equipment - equipment
- protocols - protocols
date: 2024-02-28
--- ---
Quality Control Certified是指通过一系列认证和标准评估的质量控制体系，其中UL（Underwriters Laboratories）、TUV（Technischer Überwachungsverein）和ISO（International Organization for Standardization）是三个常见的认证和标准机构。下面是它们的简要介绍： Quality Control Certified是指通过一系列认证和标准评估的质量控制体系，其中UL（Underwriters Laboratories）、TUV（Technischer Überwachungsverein）和ISO（International Organization for Standardization）是三个常见的认证和标准机构。下面是它们的简要介绍：

1
content/signal_processing/envelope/hilbert_transform.md
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@ -4,6 +4,7 @@ tags:
- signal-processing - signal-processing
- algorithm - algorithm
- envelope - envelope
date: 2024-02-28
--- ---
# Introduction # Introduction

1
content/signal_processing/filter/chebyshev_filter.md
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@ -3,6 +3,7 @@ title: Chebyshev Filter
tags: tags:
- signal-processing - signal-processing
- filter - filter
date: 2024-02-28
--- ---
# History # History

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content/synthetic_aperture_radar_imaging/Antenna.md
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@ -4,6 +4,7 @@ tags:
- SAR - SAR
- physics - physics
- basic - basic
date: 2024-02-28
--- ---
# Theorem you need know # Theorem you need know

1
content/synthetic_aperture_radar_imaging/Chirp.md
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@ -3,6 +3,7 @@ title: Chirp - 啁啾
tags: tags:
- basic - basic
- signal - signal
date: 2024-02-28
--- ---
啁啾（Chirp）是指频率随时间而改变（增加或减少）的信号。其名称来源于这种信号听起来类似鸟鸣的啾声。 啁啾（Chirp）是指频率随时间而改变（增加或减少）的信号。其名称来源于这种信号听起来类似鸟鸣的啾声。

1
content/synthetic_aperture_radar_imaging/Radiometric_Calibration.md
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@ -3,6 +3,7 @@ title: Radiometric Calibration - 辐射校准
tags: tags:
- SAR - SAR
- basic - basic
date: 2024-02-28
--- ---
# Overview # Overview

5
content/synthetic_aperture_radar_imaging/SAR_Explained.md
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@ -3,6 +3,7 @@ title: Synthetic Aperture Radar (SAR) Explained
tags: tags:
- SAR - SAR
- basic - basic
date: 2024-02-28
--- ---
# Radar Basic Concepts # Radar Basic Concepts
@ -35,7 +36,7 @@ The transmitter generates successive short bursts or pulses of microwave at regu
* Radar can measure *amplitude* and *phase* * Radar can measure *amplitude* and *phase*
* Radar can only measure part of echoes. * Radar can only measure part of echoes.
* The strength of the reflected echo is the backscattering coefficient ([sigma nought](synthetic_aperture_radar_imaging/Radiometric_Calibration.md)）and is expressed in [decibels(dB)](signal_processing/basic_knowledge/concept/what_is_dB.md) * The strength of the reflected echo is the backscattering coefficient ([sigma nought](synthetic_aperture_radar_imaging/radiometric_calibration.md)）and is expressed in [decibels(dB)](signal_processing/basic_knowledge/concept/what_is_dB.md)
## Radar Resolution ## Radar Resolution
@ -46,7 +47,7 @@ The transmitter generates successive short bursts or pulses of microwave at regu
side-looking的雷达被分为two types —— real aperture radar(*SLAR or SLR*, SL for side-looking)和synthetic aperture radar(SAR) side-looking的雷达被分为two types —— real aperture radar(*SLAR or SLR*, SL for side-looking)和synthetic aperture radar(SAR)
如上图所示，雷达发出的pulse被[antenna聚焦](synthetic_aperture_radar_imaging/Antenna.md)在一个narrow的area里，然后scatter后在不同和的时间再被receiver接收 如上图所示，雷达发出的pulse被[antenna聚焦](synthetic_aperture_radar_imaging/antenna.md)在一个narrow的area里，然后scatter后在不同和的时间再被receiver接收
### Resolution ### Resolution

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content/synthetic_aperture_radar_imaging/SAR_Imaging_Algorithm.md
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@ -5,6 +5,7 @@ tags:
- basic - basic
- algorithm - algorithm
- state-of-art - state-of-art
date: 2024-02-28
--- ---

6
content/synthetic_aperture_radar_imaging/SAR_MOC.md
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@ -9,9 +9,9 @@ date: 2024-02-28
# Antenna # Antenna
* [Antenna](synthetic_aperture_radar_imaging/Antenna.md) * [antenna](synthetic_aperture_radar_imaging/antenna.md)
# SAR # SAR
* [[synthetic_aperture_radar_imaging/SAR_Explained|SAR Explained]] * [[synthetic_aperture_radar_imaging/SAR_explained|SAR Explained]]
* [SAR Imaging Algorithm review in 2022](synthetic_aperture_radar_imaging/SAR_Imaging_Algorithm.md) * [SAR Imaging Algorithm review in 2022](synthetic_aperture_radar_imaging/SAR_imaging_algorithm.md)

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content/tmp_script/interview_31_ans.md
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@ -2,6 +2,7 @@
title: 2023三位一体 - 生医工面试真题 title: 2023三位一体 - 生医工面试真题
tags: tags:
- tmp - tmp
date: 2024-02-28
--- ---

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content/tmp_script/prefix_sum.md
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@ -2,6 +2,7 @@
title: Prefix Sum title: Prefix Sum
tags: tags:
- basic - basic
date: 2024-02-28
--- ---
假设我们有一个长度为n的数组arr，**前缀和**数组prefixSum的定义如下： 假设我们有一个长度为n的数组arr，**前缀和**数组prefixSum的定义如下：

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git_time_get.py
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@ -9,7 +9,7 @@ if __name__ == '__main__':
for root, dirs, files in os.walk(content_path): for root, dirs, files in os.walk(content_path):
for file in files: for file in files:
if "." in root: if '.' in root:
continue continue
# ignore bug and continue running # ignore bug and continue running
@ -26,31 +26,41 @@ if __name__ == '__main__':
flag = False flag = False
# open file and write date into it # open file and write date into it
with open(os.path.join(root, file), 'r') as f: f = open(os.path.join(root, file), 'r', encoding="utf-8")
lines = f.readlines() lines = f.readlines()
if lines[0].startswith("---"): if lines[0].startswith("---"):
for i in range(1, len(lines)): for i in range(1, len(lines)):
if lines[i] == "---\n" and lines[i-1].startswith("date") == False: if lines[i] == "---\n" and lines[i-1].startswith("date") == False:
flag = True flag = True
lines.insert(i, f"date: {str(commit.committed_datetime).split(' ')[0]}\n") lines.insert(i, f"date: {str(commit.committed_datetime).split(' ')[0]}\n")
break break
if lines[i] == "---\n" and lines[i-1].startswith("date") == True:
break
f.close() f.close()
if flag == True: if flag == True:
with open(os.path.join(root, file), 'w') as f:
f.writelines(lines) f = open(os.path.join(root, file), 'w', encoding="utf-8")
print(f"{file_path} - {str(commit.committed_datetime).split(' ')[0]}")
f.writelines(lines)
print(f"{file_path} - {str(commit.committed_datetime).split(' ')[0]}")
f.close() f.close()
except: except:
# output error message
print(f"Error: {file_path}")
pass pass
continue continue
print()
print('--------------------------------------')
print
try: try:
@ -62,7 +72,7 @@ if __name__ == '__main__':
if '.md' in file: if '.md' in file:
with open(os.path.join(root, file), 'r') as f: with open(os.path.join(root, file), 'r', encoding='utf-8') as f:
lines = f.readlines() lines = f.readlines()
if lines[0].startswith("---") == False: if lines[0].startswith("---") == False:
print(f"{os.path.join(root, file)}") print(f"{os.path.join(root, file)}")
@ -70,4 +80,5 @@ if __name__ == '__main__':
f.close() f.close()
except: except:
print(f"Error: {os.path.join(root, file)}")
pass pass