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Qijun (Bell) Zhong
Undergraduate · Sun Yat-sen University · Embodied AI & Computational Cognitive Science
zhongqj7@mail2.sysu.edu.cn · zhongqijunbell@gmail.com · gaigebell.github.io · github.com/gaigebell · LinkedIn · Google Scholar
Guangzhou, China
Summary
Undergraduate at Sun Yat-sen University working at the intersection of embodied AI and computational cognitive science. Hands-on experience with deep reinforcement learning systems, neuroscience-inspired computational modeling, and robot-manipulation pipelines on Franka Research 3.
Education
Research Experience
Embodied AI — reinforcement learning and active perception.
- Designed a two-phase MDP framework that separates goal inference from goal-conditioned planning; recovers the optimal strategy when observations are informative.
- Built a feature-based heuristic model (linear regression) that captures most human behavior and isolates the contribution of goal inference.
- Introduced a mixed-strategy model (logistic regression over weighted combinations) that explains residual variance beyond the optimal strategy.
- Vectorized single-goal heuristic features to extend to a multi-goal setting without retraining.
Computational cognitive science — planning, decision-making, memory and habits, brain-computer interfaces.
- Built behavioral-computational models of partner selection under ability vs warmth trade-offs using reinforcement-learning frameworks.
- Parallelized parameter-search for fitting candidate models to behavior; improved parameter-precision from 0.1 to 0.001.
- Built end-to-end pipeline (preprocessing, training, evaluation, inference) for reconstructing Chinese semantic representation from EEG/fMRI signals using deep learning.
- Used Distributed Data Parallel (DDP) on a multi-node multi-GPU cluster; compressed model training time from 4 days to 1.5 days on identical data and model.
Projects
- Designed a two-phase MDP that separates goal inference from goal-conditioned planning.
- Built a feature-based heuristic baseline (linear regression) for human behavior.
- Introduced a mixed-strategy model (logistic regression) explaining residual variance.
- Vectorized single-goal features for multi-goal extension.
- Parallelized parameter-search for model fitting; parameter precision 0.1 → 0.001.
- {"End-to-end pipeline" => "preprocessing, training, evaluation, inference."}
- DDP-based multi-node multi-GPU training; 4 days → 1.5 days on identical model & data.
- {"5× faster teleoperation" => "motion-rate factor 0.01 → 0.05 while keeping trajectories smooth."}
- ~90% fewer interruptions during long sessions via buffering, deadband tuning, reconnection protocol.
- End-to-end gripper open/close control in the recorded trajectory stream.
- Designed and implemented the Franka Research 3 driver in the hardware abstraction layer (HAL).
- Lets LLM agents take over Franka Research 3 without per-user environment setup.
- End-to-end pipeline for world-model data on Franka Research 3.
- Active perception research (Matlab).
- {"Course project" => "intelligent analysis of music scores / tabs (Python + Web)."}
Publications
Manuscripts in preparation — see /projects/ for current work.
Skills
Honors & Awards
To be added.