Sergei Solovev · HSE University, Faculty of Computer Science
Empirical study showing a sample-size sign reversal in naive RAG for Solidity vulnerability detection: +2.0% Macro-F1 at n=100 flips to -2.7% at n=250 on SolidiFI. Argues for bootstrap confidence intervals in any RAG evaluation.
Autonomous AI agent managing an ERC-4626 yield vault via MCDM scoring (APY/Risk/Cost/Stability). EIP-712 signed decisions, UUPS-upgradeable, 67 unit tests, 76,800+ invariant calls with zero violations. Sepolia deployment included.
Dual-branch BiGRU-CNN for high-frequency LOB mid-price prediction. Weighted Pearson rho_w = 0.266, outperforming LightGBM on 58.3% of sequences. Documents feature sufficiency and the negative ensemble effect on HF data (Wunder Fund RNN challenge).
XGBoost + Optuna on 117,091 Slither-labelled Ethereum contracts achieves F1=0.948 using 65 hand-crafted bytecode features in 15 SWC-mapped semantic categories. Binary classification: recall 0.950, MCC 0.832, PR-AUC 0.990.
EasyOCR + heuristic rules vs. Donut end-to-end Transformer on SROIE 2019. Error taxonomy under image degradation typical of messenger-grade distortions (compression, rotation, blur).