Junlong Shen

M.Sc. student in electrical and computer engineering at the University of Alberta; B.E. in automation from Jilin University. Along the way: bio-inspired robot navigation at NII, Tokyo, and robotic manipulation at Western University.

Research

ECCV 2026 · first author

Weight Feedback Computes the Jacobian Transpose Locally in Modern Deep Networks

A synapse-local predictive-coding learning rule that removes the Jacobian transpose from backpropagation's error transport — and, unlike previous predictive-coding methods, gets better as the network gets deeper.

CONTEXTUS workshop, ECCV 2026 · first author

Metric-Aware Candidate Reranking for Structured Multimodal Event Recognition

The winning Track-1 entry to the ChaLearn UDIVA-HHOI challenge, with an analysis of why the ceiling is low — the binding limit is available context, not model capacity.

ArabicNLP 2026, at EMNLP · sole author

JLShen at StanceEval-2026: Cross-Lab LLM Ensembles and a Break-Even Rule for the Excluded Class

System paper for the shared task — first of 31 on seen targets, second of 22 on unseen — deriving the precision a repair must reach to pay off on a metric that excludes the NONE class.

AAAI 2026 (Oral) · second author

From Dataset to Real-world: General 3D Object Detection via Generalized Cross-domain Few-shot Learning

A unified framework for 3D detection that survives the move out of the dataset — combining multi-modal fusion with contrastive-enhanced prototype learning to face domain shift and data scarcity at once.

Competitions

ITSC 2026 · 2nd place · solo

Mixed Signals: V2X Collaborative 3D Object Detection

Collaborative 3D object detection fusing vehicle and infrastructure sensing on the Mixed Signals V2X benchmark.

MICCAI 2026 · 4th · 4th · 3rd across three tasks · solo

STSR 2026 Challenge

Semi-supervised teeth and pulp-canal segmentation with metal-artifact removal in CBCT, crown–root registration across CBCT and intraoral scans, and multimodal dental analysis.

ArabicNLP 2026, at EMNLP · 1st of 31, seen targets · 2nd of 22, unseen · solo

StanceEval 2026: Arabic Stance Detection

Detecting the stance of Arabic text toward its target — first on Track 1, where targets are seen in training, and second on Track 2, where they are not.

NeurIPS 2025 · 1st place, psychopathology track (Challenge 2) · solo, as team JLShen

EEG Foundation Challenge: From Cross-Task to Cross-Subject EEG Decoding

Predicting the externalizing dimension of the psychopathology p-factor from EEG, invariant across subjects — first at 0.97843; tenth on Challenge 1, cross-task transfer of behavioural response time.

IROS 2025 · 2nd place, two tracks · team Point Loom, two people

RoboSense 2025 Challenge

Second in both tracks entered — Sensor Placement (Track 3) and Cross-Platform 3D Object Detection (Track 5) — on robust robot sensing across platforms and viewpoints.

DJI RoboMaster University League · Top 8 · software team lead, University of Alberta club

RoboMaster North America 2024

An esports-style, full-stack robotics league with fleets of up to nine robots — led the software team across a two-year cycle, building real-time armor-plate detection for turret auto-aiming in C++ and SLAM navigation with AI perception for the sentry.

Photographs

Heating season
Lanterns still up, no traffic
The last of the light
Rapeseed, and the village behind it
Swept leaves, poplar wood
The building, from below
The lights still on
Through the window, past the car
Turbine, from a moving window
Two, on the snow
Waiting on the far side
Wires, and the stars behind them

Writing

我转身背离过去,面对火焰,把遗憾烧尽。

I turned from the past to face the flame, and burned the regret away.

人们用道路切割大地;高楼大厦就是人类的蜂巢。

People cut the earth apart with roads; the towers are the human hive.

Projects

On the way