Search Results for author: Yifeng Zhang

Found 13 papers, 3 papers with code

SocialLight: Distributed Cooperation Learning towards Network-Wide Traffic Signal Control

no code implementations20 Apr 2023 Harsh Goel, Yifeng Zhang, Mehul Damani, Guillaume Sartoretti

To address these problems, we propose a new MARL method for traffic signal control, SocialLight, which learns cooperative traffic control policies by distributedly estimating the individual marginal contribution of agents on their local neighborhood.

counterfactual Counterfactual Reasoning +1

Simulation of snakes using vertical body bending to traverse terrain with large height variation

no code implementations26 Jul 2022 Yifeng Zhang, Qihan Xuan, Qiyuan Fu, Chen Li

Remarkably, even when frictional drag is low (snake-terrain kinetic friction coefficient of 0. 20), the body must push against the wedge with a pressure 5 times that from body weight to generate sufficient forward propulsion to move forward.

Friction

Query and Attention Augmentation for Knowledge-Based Explainable Reasoning

1 code implementation CVPR 2022 Yifeng Zhang, Ming Jiang, Qi Zhao

Explainable visual question answering (VQA) models have been developed with neural modules and query-based knowledge incorporation to answer knowledge-requiring questions.

Question Answering Visual Question Answering

Explicit Knowledge Incorporation for Visual Reasoning

no code implementations CVPR 2021 Yifeng Zhang, Ming Jiang, Qi Zhao

Existing explainable and explicit visual reasoning methods only perform reasoning based on visual evidence but do not take into account knowledge beyond what is in the visual scene.

Visual Reasoning

Gelfand $W$-graphs for classical Weyl groups

no code implementations27 Dec 2020 Eric Marberg, Yifeng Zhang

For types BC and D, we prove that these $W$-graphs are dual to each other, a phenomenon which does not occur in type A.

Representation Theory Combinatorics

Saliency Prediction with External Knowledge

no code implementations27 Jul 2020 Yifeng Zhang, Ming Jiang, Qi Zhao

At the core of the method is a new Graph Semantic Saliency Network (GraSSNet) that constructs a graph that encodes semantic relationships learned from external knowledge.

Graph Attention Saliency Prediction

DA-LSTM: A Long Short-Term Memory with Depth Adaptive to Non-uniform Information Flow in Sequential Data

no code implementations18 Jan 2019 Yifeng Zhang, Ka-Ho Chow, S. -H. Gary Chan

In this paper, we develop a Depth-Adaptive Long Short-Term Memory (DA-LSTM) architecture, which can dynamically adjust the structure depending on information distribution without prior knowledge.

Affine transitions for involution Stanley symmetric functions

1 code implementation12 Dec 2018 Eric Marberg, Yifeng Zhang

We study a family of symmetric functions $\hat F_z$ indexed by involutions $z$ in the affine symmetric group.

Combinatorics Representation Theory

Multi-granularity Generator for Temporal Action Proposal

no code implementations CVPR 2019 Yuan Liu, Lin Ma, Yifeng Zhang, Wei Liu, Shih-Fu Chang

In this paper, we propose a multi-granularity generator (MGG) to perform the temporal action proposal from different granularity perspectives, relying on the video visual features equipped with the position embedding information.

Action Recognition Temporal Action Proposal Generation

Representation Learning of Pedestrian Trajectories Using Actor-Critic Sequence-to-Sequence Autoencoder

no code implementations20 Nov 2018 Ka-Ho Chow, Anish Hiranandani, Yifeng Zhang, S. -H. Gary Chan

Representation learning of pedestrian trajectories transforms variable-length timestamp-coordinate tuples of a trajectory into a fixed-length vector representation that summarizes spatiotemporal characteristics.

Representation Learning

An Attention-Based Approach for Single Image Super Resolution

no code implementations18 Jul 2018 Yuan Liu, Yuancheng Wang, Nan Li, Xu Cheng, Yifeng Zhang, Yongming Huang, Guojun Lu

We propose an attention-based approach to give a discrimination between texture areas and smooth areas.

Image Super-Resolution

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