TildAlice – Tech Blog for Developers
Python, AI, Deep Learning, Data Analysis, Computer Vision, Reinforcement Learning โ tips and tutorials
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์ํฅ ๋ฐฉ์ถ(AE) ์ผ์๋ก ๊ธฐ์ด๋ฐ์ค ๊ณ ์ฅ ์กฐ๊ธฐ ํ์งํ๊ธฐ: ์๊ฐ-์ฃผํ์ ํน์ง ์ถ์ถ๊ณผ 1D-CNN ๋ถ๋ฅ ๋ชจ๋ธ ์์ ๊ฐ์ด๋
Catch gearbox cracks early with acoustic emission sensors. STFT/wavelet feature extraction + 1D-CNN classification โ full pipeline guide.
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๋ค์ด๋๋ฏน ํ๋ก๊ทธ๋๋ฐ(DP) ํจํด๋ณ ์์ ์ ๋ณต – Knapsack๋ถํฐ ๋นํธ๋ง์คํน DP๊น์ง
Master DP patterns that solve 80% of coding interviews: Knapsack, LIS, LCS, and bitmask DP with Python code and O(n) optimizations.
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BFS/DFS ์์ ์ ๋ณต – ๊ทธ๋ํ ํ์ ์๊ณ ๋ฆฌ์ฆ ๊ตฌํ๋ถํฐ ์ค์ ์์ฉ๊น์ง
BFS vs DFS: when to use each, how they differ in time complexity, and 5 graph problems you can't solve without mastering both algorithms.
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๊ทธ๋ฆฌ๋ ์๊ณ ๋ฆฌ์ฆ ์๋ฒฝ ์ ๋ฆฌ – ํ๋ ์ ํ, ํ์์ค ๋ฐฐ์ ๋ฑ ์ฝ๋ฉํ ์คํธ ํ์ ์ ํ ํ์ด
Greedy algorithms decoded: solve activity selection, meeting rooms, and coin change in O(n log n). Spot the 3 cases where greedy fails.
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SQL๊ณผ Python ์ฐ๋ ์๋ฒฝ ๊ฐ์ด๋: SQLAlchemy + Pandas ์ค์ ์ํฌํ๋ก์ฐ
Connect SQL to Python with SQLAlchemy + Pandas: extract 1M rows in 30 seconds, automate reports, and avoid the 3 common connection leaks.
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Policy Gradient ์๋ฒฝ ๊ฐ์ด๋: REINFORCE๋ถํฐ PPO๊น์ง ์ํ ์๋ฆฌ์ PyTorch ๊ตฌํ
Policy Gradient from scratch: REINFORCE to PPO with PyTorch code. Reduce variance 100x using baselines and see why PPO beats vanilla PG.
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Python ํ์ ํํธ ๊ณ ๊ธ ํ์ฉ: Generic, Protocol, TypeVar๋ก ํ์ ์์ ํ ๋ผ์ด๋ธ๋ฌ๋ฆฌ ์ค๊ณํ๊ธฐ
Build type-safe Python libraries using Generic, Protocol, and TypeVar. Catch bugs at edit-time, not runtimeโhere's the exact pattern.
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์ฌ๋ผ์ด๋ฉ ์๋์ฐ ํจํด: O(Nยฒ)์์ O(N)์ผ๋ก ์ต์ ํ
Speed up subarray problems from O(nยฒ) to O(n) using sliding window. Fixed vs variable size, two pointers, and 4 LeetCode patterns solved.