Search Results for author: Yufan Zhang

Found 20 papers, 7 papers with code

EI-Nexus: Towards Unmediated and Flexible Inter-Modality Local Feature Extraction and Matching for Event-Image Data

1 code implementation29 Oct 2024 Zhonghua Yi, Hao Shi, Qi Jiang, Kailun Yang, Ze Wang, Diyang Gu, Yufan Zhang, Kaiwei Wang

Event cameras, with high temporal resolution and high dynamic range, have limited research on the inter-modality local feature extraction and matching of event-image data.

Pose Estimation

Learning Infinite-Horizon Average-Reward Linear Mixture MDPs of Bounded Span

no code implementations19 Oct 2024 Woojin Chae, Kihyuk Hong, Yufan Zhang, Ambuj Tewari, Dabeen Lee

Our algorithm for linear mixture MDPs achieves a nearly minimax optimal regret upper bound of $\widetilde{\mathcal{O}}(d\sqrt{\mathrm{sp}(v^*)T})$ over $T$ time steps where $\mathrm{sp}(v^*)$ is the span of the optimal bias function $v^*$ and $d$ is the dimension of the feature mapping.

P2U-SLAM: A Monocular Wide-FoV SLAM System Based on Point Uncertainty and Pose Uncertainty

1 code implementation16 Sep 2024 Yufan Zhang, Kailun Yang, Ze Wang, Kaiwei Wang

This paper presents P2U-SLAM, a visual Simultaneous Localization And Mapping (SLAM) system with a wide Field of View (FoV) camera, which utilizes pose uncertainty and point uncertainty.

Simultaneous Localization and Mapping

Efficient Unit Commitment Constraint Screening under Uncertainty

no code implementations9 Aug 2024 Xuan He, Honglin Wen, Yufan Zhang, Yize Chen, Danny H. K. Tsang

We verify the proposed method's performance on a variety of UC setups and uncertainty situations.

Load Forecasting

Risk-Aware Value-Oriented Net Demand Forecasting for Virtual Power Plants

no code implementations14 Jun 2024 Yufan Zhang, Jiajun Han, Yuanyuan Shi

This paper develops a risk-aware net demand forecasting product for virtual power plants, which helps reduce the risk of high operation costs.

Demand Forecasting

Reinforcement Learning for Infinite-Horizon Average-Reward Linear MDPs via Approximation by Discounted-Reward MDPs

no code implementations23 May 2024 Kihyuk Hong, Woojin Chae, Yufan Zhang, Dabeen Lee, Ambuj Tewari

Our algorithm runs an optimistic value iteration on a discounted-reward MDP that approximates the average-reward setting.

Improving Sequential Market Coordination via Value-oriented Renewable Energy Forecasting

no code implementations15 May 2024 Yufan Zhang, Honglin Wen, Yuexin Bian, Yuanyuan Shi

Numerical studies demonstrate that our forecasts significantly reduce overall operating costs for deterministic market clearing compared to conventional forecasts based on expected RES production.

Deriving Loss Function for Value-oriented Renewable Energy Forecasting

no code implementations1 Oct 2023 Yufan Zhang, Honglin Wen, Yuexin Bian, Yuanyuan Shi

By integrating it into the upper-level objective for minimizing expected operation cost, we convert the bilevel problem to a single-level one and derive the loss function for training the model.

Fast Constraint Screening for Multi-Interval Unit Commitment

no code implementations12 Sep 2023 Xuan He, Jiayu Tian, Yufan Zhang, Honglin Wen, Yize Chen

Extensive simulations on both specific load samples and load regions validate the proposed technique can screen out more than 80% constraints while preserving the feasibility of multi-interval UC problem.

Toward Value-oriented Renewable Energy Forecasting: An Iterative Learning Approach

1 code implementation2 Sep 2023 Yufan Zhang, Mengshuo Jia, Honglin Wen, Yuexin Bian, Yuanyuan Shi

To bridge the gap, we design a value-oriented point forecasting approach for sequential energy dispatch problems with renewable energy sources.

LF-PGVIO: A Visual-Inertial-Odometry Framework for Large Field-of-View Cameras using Points and Geodesic Segments

1 code implementation11 Jun 2023 Ze Wang, Kailun Yang, Hao Shi, Yufan Zhang, Zhijie Xu, Fei Gao, Kaiwei Wang

The purpose of our research is to unleash the potential of point-line odometry with large-FoV omnidirectional cameras, even for cameras with negative-plane FoV.

Line Detection

Optimal Vehicle Charging in Bilevel Power-Traffic Networks via Charging Demand Function

no code implementations22 Apr 2023 Yufan Zhang, Sujit Dey, Yuanyuan Shi

Specifically, the power network determines the charging price at various locations, while EVs on the traffic network optimize the charging power given the price, acting as price-takers.

Decision Making

Blockchain Network Analysis: A Comparative Study of Decentralized Banks

1 code implementation11 Dec 2022 Yufan Zhang, Zichao Chen, Yutong Sun, Yulin Liu, Luyao Zhang

We apply core-periphery network features analysis using the transaction data from four decentralized banks, Liquity, Aave, MakerDao, and Compound.

Enabling Fast Unit Commitment Constraint Screening via Learning Cost Model

no code implementations1 Dec 2022 Xuan He, Honglin Wen, Yufan Zhang, Yize Chen

Unit commitment (UC) are essential tools to transmission system operators for finding the most economical and feasible generation schedules and dispatch signals.

Efficient Demand Response Location Targeting for Price Spike Mitigation by Exploiting Price-demand Relationship

no code implementations27 Nov 2022 Yufan Zhang, Honglin Wen, Tao Feng, Yize Chen

We formulate a bilevel program where the upper level determines the DR locations and demand reductions while ensuring the average nodal prices meet a predetermined target.

Benchmarking

A Contextual Bandit Approach for Value-oriented Prediction Interval Forecasting

no code implementations9 Oct 2022 Yufan Zhang, Honglin Wen, Qiuwei Wu

The numerical study regarding a two-timescale operation of a virtual power plant verifies the superiority of the proposed approach in terms of operational value.

Optimal Adaptive Prediction Intervals for Electricity Load Forecasting in Distribution Systems via Reinforcement Learning

1 code implementation18 May 2022 Yufan Zhang, Honglin Wen, Qiuwei Wu, Qian Ai

Case studies on both load and net load demonstrate that the proposed method can better adapt to data distribution compared with online central PIs method.

Load Forecasting Prediction Intervals +2

DELTA: Dynamically Optimizing GPU Memory beyond Tensor Recomputation

1 code implementation30 Mar 2022 Yu Tang, Chenyu Wang, Yufan Zhang, Yuliang Liu, Xingcheng Zhang, Linbo Qiao, Zhiquan Lai, Dongsheng Li

To the best of our knowledge, we are the first to make a reasonable dynamic runtime scheduler on the combination of tensor swapping and tensor recomputation without user oversight.

Cannot find the paper you are looking for? You can Submit a new open access paper.