Search Results for author: Si Zhang

Found 13 papers, 0 papers with code

VCR-Graphormer: A Mini-batch Graph Transformer via Virtual Connections

no code implementations24 Mar 2024 Dongqi Fu, Zhigang Hua, Yan Xie, Jin Fang, Si Zhang, Kaan Sancak, Hao Wu, Andrey Malevich, Jingrui He, Bo Long

Therefore, mini-batch training for graph transformers is a promising direction, but limited samples in each mini-batch can not support effective dense attention to encode informative representations.

Feature Engineering Graph Learning

Quantifying Policy Administration Cost in an Active Learning Framework

no code implementations29 Dec 2023 Si Zhang, Philip W. L. Fong

To the best of our knowledge, this is the first work to employ an active learning framework to study the cost of policy deliberation and demonstrate the cost advantage of heuristic policy administration.

Active Learning

Empowering Working Memory for Large Language Model Agents

no code implementations22 Dec 2023 Jing Guo, Nan Li, Jianchuan Qi, Hang Yang, Ruiqiao Li, Yuzhen Feng, Si Zhang, Ming Xu

The limitations of traditional LLM memory designs are analyzed, including their isolation of distinct dialog episodes and lack of persistent memory links.

Language Modelling Large Language Model +1

Hierarchical Multi-Marginal Optimal Transport for Network Alignment

no code implementations6 Oct 2023 Zhichen Zeng, Boxin Du, Si Zhang, Yinglong Xia, Zhining Liu, Hanghang Tong

To depict high-order relationships across multiple networks, the FGW distance is generalized to the multi-marginal setting, based on which networks can be aligned jointly.

LLM-Rec: Personalized Recommendation via Prompting Large Language Models

no code implementations24 Jul 2023 Hanjia Lyu, Song Jiang, Hanqing Zeng, Yinglong Xia, Qifan Wang, Si Zhang, Ren Chen, Christopher Leung, Jiajie Tang, Jiebo Luo

Notably, the success of LLM-Rec lies in its prompting strategies, which effectively tap into the language model's comprehension of both general and specific item characteristics.

GPatcher: A Simple and Adaptive MLP Model for Alleviating Graph Heterophily

no code implementations25 Jun 2023 Shuaicheng Zhang, Haohui Wang, Si Zhang, Dawei Zhou

While graph heterophily has been extensively studied in recent years, a fundamental research question largely remains nascent: How and to what extent will graph heterophily affect the prediction performance of graph neural networks (GNNs)?

Node Classification

Dynamic Transfer Learning across Graphs

no code implementations1 May 2023 Haohui Wang, Yuzhen Mao, Jianhui Sun, Si Zhang, Yonghui Fan, Dawei Zhou

Transferring knowledge across graphs plays a pivotal role in many high-stake domains, ranging from transportation networks to e-commerce networks, from neuroscience to finance.

Transfer Learning

Do We Really Need Complicated Model Architectures For Temporal Networks?

no code implementations22 Feb 2023 Weilin Cong, Si Zhang, Jian Kang, Baichuan Yuan, Hao Wu, Xin Zhou, Hanghang Tong, Mehrdad Mahdavi

Recurrent neural network (RNN) and self-attention mechanism (SAM) are the de facto methods to extract spatial-temporal information for temporal graph learning.

Graph Learning Link Prediction

A Novel Feeder-level Microgrid Unit Commitment Algorithm Considering Cold-load Pickup, Phase Balancing, and Reconfiguration

no code implementations19 Jan 2023 Rongxing Hu, Ashwin Shirsat, Valliappan Muthukaruppan, Si Zhang, Yiyan Li, Lidong Song, Bei Xu, Victor Paduani, Ning Lu, Mesut Baran, Wenyuan Tang

This paper presents a novel 2-stage microgrid unit commitment (Microgrid-UC) algorithm considering cold-load pickup (CLPU) effects, three-phase load balancing requirements, and feasible reconfiguration options.

Scheduling

Retrieval Based Time Series Forecasting

no code implementations27 Sep 2022 Baoyu Jing, Si Zhang, Yada Zhu, Bin Peng, Kaiyu Guan, Andrew Margenot, Hanghang Tong

In this paper, we show both theoretically and empirically that the uncertainty could be effectively reduced by retrieving relevant time series as references.

Imputation Retrieval +2

Reinforcement Learning for Volt-Var Control: A Novel Two-stage Progressive Training Strategy

no code implementations23 Nov 2021 Si Zhang, Mingzhi Zhang, Rongxing Hu, David Lubkeman, Yunan Liu, Ning Lu

In Stage 1(individual training), while holding all the other agents inactive, we separately train each agent to obtain its own optimal VVC actions in the action space: {consume, generate, do-nothing}.

reinforcement-learning Reinforcement Learning (RL)

A TCN-based Hybrid Forecasting Framework for Hours-ahead Utility-scale PV Forecasting

no code implementations16 Nov 2021 Yiyan Li, Lidong Song, Si Zhang, Laura Kraus, Taylor Adcox, Roger Willardson, Abhishek Komandur, Ning Lu

The hybrid framework consists of two forecasting models: a physics-based trend forecasting (TF) model and a data-driven cloud-event forecasting (CF) model.

A Meta-learning based Distribution System Load Forecasting Model Selection Framework

no code implementations25 Sep 2020 Yiyan Li, Si Zhang, Rongxing Hu, Ning Lu

This paper presents a meta-learning based, automatic distribution system load forecasting model selection framework.

Load Forecasting Meta-Learning +1

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