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Zhihao Guo

7 accepted papers

2026

DCTR: Dual-Constraint Subgraph Optimization for Knowledge Graph-based Retrieval-Augmented Generation

AAAI 2026technical

Knowledge Graph (KG)-based Retrieval-Augmented Generation (RAG) shifts the contents of retrieval from narrative text to a relational knowledge network, empowering large language models (LLMs) to harness structured relationships between entities. However, conventional KG-RAG approaches are resource-i

Cited by 0SourcePDFScholar
2024

Enhancing Visual Document Understanding with Contrastive Learning in Large Visual-Language Models

CVPR 2024poster

Recently the advent of Large Visual-Language Models (LVLMs) has received increasing attention across various domains particularly in the field of visual document understanding (VDU). Different from conventional vision-language tasks VDU is specifically concerned with text-rich scenarios containing a…

Cited by 14SourcePDFScholar
2024

Robot Shape and Location Retention in Video Generation Using Diffusion Models

IROS 2024poster

Diffusion models have marked a significant mile-stone in the enhancement of image and video generation technologies. However, generating videos that precisely retain the shape and location of moving objects such as robots remains a challenge. This paper presents diffusion models specifically tailore…

Cited by 1SourcecodeScholar
2023

The NPU-Elevoc Personalized Speech Enhancement System for Icassp2023 DNS Challenge

ICASSP 2023accepted

This paper describes our NPU-Elevoc personalized speech enhancement system (NAPSE) for the 5th Deep Noise Suppression Challenge[1] at ICASSP 2023. Based on the superior two-stage model TEA-PSE 2.0 [2], our system particularly explores better strategy for speaker embedding fusion, optimizes the model…

Cited by 0SourceScholar