Search Results for author: Nan Zhang

Found 38 papers, 13 papers with code

STAPI: An Automatic Scraper for Extracting Iterative Title-Text Structure from Web Documents

1 code implementation LREC 2022 Nan Zhang, Shomir Wilson, Prasenjit Mitra

Therefore, we propose the first title-text dataset on web documents that incorporates a wide variety of domains to facilitate downstream training.

Headline Generation

A Foundational Generative Model for Breast Ultrasound Image Analysis

no code implementations12 Jan 2025 Haojun Yu, Youcheng Li, Nan Zhang, Zihan Niu, Xuantong Gong, Yanwen Luo, Haotian Ye, Siyu He, Quanlin Wu, Wangyan Qin, Mengyuan Zhou, Jie Han, Jia Tao, Ziwei Zhao, Di Dai, Di He, Dong Wang, Binghui Tang, Ling Huo, James Zou, Qingli Zhu, Yong Wang, LiWei Wang

Additionally, we characterized the scaling effect of using generated data which was as effective as the collected real-world data for training diagnostic models.

Distributed satellite information networks: Architecture, enabling technologies, and trends

no code implementations17 Dec 2024 Qinyu Zhang, Liang Xu, Jianhao Huang, Tao Yang, Jian Jiao, Ye Wang, Yao Shi, Chiya Zhang, Xingjian Zhang, Ke Zhang, Yupeng Gong, Na Deng, Nan Zhao, Zhen Gao, Shujun Han, Xiaodong Xu, Li You, Dongming Wang, Shan Jiang, Dixian Zhao, Nan Zhang, Liujun Hu, Xiongwen He, Yonghui Li, Xiqi Gao, Xiaohu You

In this context, the distributed satellite information networks (DSIN), exemplified by the cohesive clustered satellites system, have emerged as an innovative architecture, bridging information gaps across diverse satellite systems, such as communication, navigation, and remote sensing, and establishing a unified, open information network paradigm to support resilient space information services.

SiReRAG: Indexing Similar and Related Information for Multihop Reasoning

no code implementations9 Dec 2024 Nan Zhang, Prafulla Kumar Choubey, Alexander Fabbri, Gabriel Bernadett-Shapiro, Rui Zhang, Prasenjit Mitra, Caiming Xiong, Chien-Sheng Wu

On the similarity side, we follow existing work and explore some variances to construct a similarity tree based on recursive summarization.

RAG Retrieval +2

From MOOC to MAIC: Reshaping Online Teaching and Learning through LLM-driven Agents

no code implementations5 Sep 2024 Jifan Yu, Zheyuan Zhang, Daniel Zhang-li, Shangqing Tu, Zhanxin Hao, Rui Miao Li, Haoxuan Li, Yuanchun Wang, Hanming Li, Linlu Gong, Jie Cao, Jiayin Lin, Jinchang Zhou, Fei Qin, Haohua Wang, Jianxiao Jiang, Lijun Deng, Yisi Zhan, Chaojun Xiao, Xusheng Dai, Xuan Yan, Nianyi Lin, Nan Zhang, Ruixin Ni, Yang Dang, Lei Hou, Yu Zhang, Xu Han, Manli Li, Juanzi Li, Zhiyuan Liu, Huiqin Liu, Maosong Sun

Since the first instances of online education, where courses were uploaded to accessible and shared online platforms, this form of scaling the dissemination of human knowledge to reach a broader audience has sparked extensive discussion and widespread adoption.

Knowledge-driven AI-generated data for accurate and interpretable breast ultrasound diagnoses

no code implementations23 Jul 2024 Haojun Yu, Youcheng Li, Nan Zhang, Zihan Niu, Xuantong Gong, Yanwen Luo, Quanlin Wu, Wangyan Qin, Mengyuan Zhou, Jie Han, Jia Tao, Ziwei Zhao, Di Dai, Di He, Dong Wang, Binghui Tang, Ling Huo, Qingli Zhu, Yong Wang, LiWei Wang

In the prospective external evaluation, our diagnostic model outperforms the average performance of nine radiologists by 33. 5% in specificity with the same sensitivity, improving their performance by providing predictions with an interpretable decision-making process.

Decision Making Specificity

MSCT: Addressing Time-Varying Confounding with Marginal Structural Causal Transformer for Counterfactual Post-Crash Traffic Prediction

no code implementations19 Jul 2024 Shuang Li, Ziyuan Pu, Nan Zhang, Duxin Chen, Lu Dong, Daniel J. Graham, Yinhai Wang

In the absence of ground-truth data, a synthetic data generation procedure is proposed to emulate the causal mechanism between traffic speed, crashes, and covariates.

counterfactual Synthetic Data Generation +1

Sustainable Wireless Networks via Reconfigurable Intelligent Surfaces (RISs): Overview of the ETSI ISG RIS

no code implementations9 Jun 2024 Ruiqi Liu, Shuang Zheng, Qingqing Wu, Yifan Jiang, Nan Zhang, Yuanwei Liu, Marco Di Renzo, and George C. Alexandropoulos

Reconfigurable Intelligent Surfaces (RISs) are a novel form of ultra-low power devices that are capable to increase the communication data rates as well as the cell coverage in a cost- and energy-efficient way.

Enhanced Semantic Segmentation Pipeline for WeatherProof Dataset Challenge

1 code implementation6 Jun 2024 Nan Zhang, Xidan Zhang, Jianing Wei, Fangjun Wang, Zhiming Tan

Firstly, we improve semantic segmentation models, using backbone pretrained with Depth Anything to improve UperNet model and SETRMLA model, and adding language guidance based on both weather and category information to InternImage model.

Data Augmentation Segmentation +2

When Can LLMs Actually Correct Their Own Mistakes? A Critical Survey of Self-Correction of LLMs

no code implementations3 Jun 2024 Ryo Kamoi, Yusen Zhang, Nan Zhang, Jiawei Han, Rui Zhang

Our critical survey based on the newly categorized research questions shows that (1) no prior work demonstrates successful self-correction with feedback from prompted LLMs, except for studies in tasks that are exceptionally suited for self-correction, (2) self-correction works well in tasks that can use reliable external feedback, and (3) large-scale fine-tuning enables self-correction.

Survey

Large Language Models for Explainable Decisions in Dynamic Digital Twins

1 code implementation23 May 2024 Nan Zhang, Christian Vergara-Marcillo, Georgios Diamantopoulos, Jingran Shen, Nikos Tziritas, Rami Bahsoon, Georgios Theodoropoulos

Dynamic data-driven Digital Twins (DDTs) can enable informed decision-making and provide an optimisation platform for the underlying system.

Decision Making

Pruning as a Domain-specific LLM Extractor

no code implementations10 May 2024 Nan Zhang, Yanchi Liu, Xujiang Zhao, Wei Cheng, Runxue Bao, Rui Zhang, Prasenjit Mitra, Haifeng Chen

Moreover, by efficiently approximating weight importance with the refined training loss on a domain-specific calibration dataset, we obtain a pruned model emphasizing generality and specificity.

Specificity

PEaCE: A Chemistry-Oriented Dataset for Optical Character Recognition on Scientific Documents

1 code implementation23 Mar 2024 Nan Zhang, Connor Heaton, Sean Timothy Okonsky, Prasenjit Mitra, Hilal Ezgi Toraman

To mitigate this gap, we present the Printed English and Chemical Equations (PEaCE) dataset, containing both synthetic and real-world records, and evaluate the efficacy of transformer-based OCR models when trained on this resource.

Optical Character Recognition Optical Character Recognition (OCR)

Beyond Efficiency: A Systematic Survey of Resource-Efficient Large Language Models

1 code implementation1 Jan 2024 Guangji Bai, Zheng Chai, Chen Ling, Shiyu Wang, Jiaying Lu, Nan Zhang, Tingwei Shi, Ziyang Yu, Mengdan Zhu, Yifei Zhang, Xinyuan Song, Carl Yang, Yue Cheng, Liang Zhao

We categorize methods based on their optimization focus: computational, memory, energy, financial, and network resources and their applicability across various stages of an LLM's lifecycle, including architecture design, pretraining, finetuning, and system design.

Survey

Point Cloud Semantic Segmentation with Sparse and Inhomogeneous Annotations

1 code implementation11 Dec 2023 Zhiyi Pan, Nan Zhang, Wei Gao, Shan Liu, Ge Li

Utilizing uniformly distributed sparse annotations, weakly supervised learning alleviates the heavy reliance on fine-grained annotations in point cloud semantic segmentation tasks.

Semantic Segmentation Weakly-supervised Learning

Fair Abstractive Summarization of Diverse Perspectives

1 code implementation14 Nov 2023 Yusen Zhang, Nan Zhang, Yixin Liu, Alexander Fabbri, Junru Liu, Ryo Kamoi, Xiaoxin Lu, Caiming Xiong, Jieyu Zhao, Dragomir Radev, Kathleen McKeown, Rui Zhang

However, current work in summarization metrics and Large Language Models (LLMs) evaluation has not explored fair abstractive summarization.

Abstractive Text Summarization Fairness

FaMeSumm: Investigating and Improving Faithfulness of Medical Summarization

1 code implementation3 Nov 2023 Nan Zhang, Yusen Zhang, Wu Guo, Prasenjit Mitra, Rui Zhang

In this paper, we investigate and improve faithfulness in summarization on a broad range of medical summarization tasks.

Contrastive Learning

A Digital Twin Approach for Adaptive Compliance in Cyber-Physical Systems: Case of Smart Warehouse Logistics

no code implementations11 Oct 2023 Nan Zhang, Rami Bahsoon, Nikos Tziritas, Georgios Theodoropoulos

Engineering regulatory compliance in complex Cyber-Physical Systems (CPS), such as smart warehouse logistics, is challenging due to the open and dynamic nature of these systems, scales, and unpredictable modes of human-robot interactions that can be best learnt at runtime.

EdgeMA: Model Adaptation System for Real-Time Video Analytics on Edge Devices

no code implementations17 Aug 2023 Liang Wang, Nan Zhang, Xiaoyang Qu, Jianzong Wang, Jiguang Wan, Guokuan Li, Kaiyu Hu, Guilin Jiang, Jing Xiao

In this paper, we introduce EdgeMA, a practical and efficient video analytics system designed to adapt models to shifts in real-world video streams over time, addressing the data drift problem.

Shoggoth: Towards Efficient Edge-Cloud Collaborative Real-Time Video Inference via Adaptive Online Learning

no code implementations27 Jun 2023 Liang Wang, Kai Lu, Nan Zhang, Xiaoyang Qu, Jianzong Wang, Jiguang Wan, Guokuan Li, Jing Xiao

This paper proposes Shoggoth, an efficient edge-cloud collaborative architecture, for boosting inference performance on real-time video of changing scenes.

Knowledge Distillation

Improving Graph Representation for Point Cloud Segmentation via Attentive Filtering

no code implementations CVPR 2023 Nan Zhang, Zhiyi Pan, Thomas H. Li, Wei Gao, Ge Li

Recently, self-attention networks achieve impressive performance in point cloud segmentation due to their superiority in modeling long-range dependencies.

Point Cloud Segmentation

Coordinating Cross-modal Distillation for Molecular Property Prediction

no code implementations30 Nov 2022 Hao Zhang, Nan Zhang, Ruixin Zhang, Lei Shen, Yingyi Zhang, Meng Liu

The existing graph methods have demonstrated that 3D geometric information is significant for better performance in MPP.

Graph Regression Graph Representation Learning +4

CMC v2: Towards More Accurate COVID-19 Detection with Discriminative Video Priors

no code implementations26 Nov 2022 Junlin Hou, Jilan Xu, Nan Zhang, Yi Wang, Yuejie Zhang, Xiaobo Zhang, Rui Feng

This paper presents our solution for the 2nd COVID-19 Competition, occurring in the framework of the AIMIA Workshop at the European Conference on Computer Vision (ECCV 2022).

COVID-19 Diagnosis Representation Learning

Explainable Human-in-the-loop Dynamic Data-Driven Digital Twins

no code implementations19 Jul 2022 Nan Zhang, Rami Bahsoon, Nikos Tziritas, Georgios Theodoropoulos

DT can leverage fundamentals of Dynamic Data-Driven Applications Systems (DDDAS) bidirectional symbiotic sensing feedback loops for its continuous updates.

Decision Making Interpretable Machine Learning

DT-SV: A Transformer-based Time-domain Approach for Speaker Verification

no code implementations26 May 2022 Nan Zhang, Jianzong Wang, Zhenhou Hong, Chendong Zhao, Xiaoyang Qu, Jing Xiao

Therefore, we propose an approach to derive utterance-level speaker embeddings via a Transformer architecture that uses a novel loss function named diffluence loss to integrate the feature information of different Transformer layers.

Speaker Verification

Knowledge Equivalence in Digital Twins of Intelligent Systems

1 code implementation15 Apr 2022 Nan Zhang, Rami Bahsoon, Nikos Tziritas, Georgios Theodoropoulos

Maintaining such an equivalent model is challenging, especially when the physical systems being modelled are intelligent and autonomous.

valid

Super Reinforcement Bros: Playing Super Mario Bros with Reinforcement Learning

1 code implementation CUHK Course IERG5350 2020 Nan Zhang, Zixing Song

We plan to apply and adjust some well-known reinforcement learning (RL) algorithms to train an automatic agent to play the 1985 Nintendo game Super Mario Bros under a speedrun rule.

Deep Reinforcement Learning reinforcement-learning +1

For Intelligent and Higher Spectrum Efficiency: A Variable Packing Ratio Transmission System Based on Faster-than-Nyquist and Deep Learning

no code implementations1 Aug 2020 Peiyang Song, Nan Zhang, Lin Cai, Guo Li, Fengkui Gong

With the rapid development of various services in wireless communications, spectrum resource has become increasingly valuable.

Leveraging History for Faster Sampling of Online Social Networks

1 code implementation ‏‏‎ ‎ 2020 Zhuojie Zhou, Nan Zhang, Gautam Das

Random walk fits naturally with this problem because, for most online social networks, the only query we can issue through the interface is to retrieve the neighbors of a given node (i. e., no access to the full graph topology).

Real Time 3D Indoor Human Image Capturing Based on FMCW Radar

no code implementations 2019 IEEE International Conference on Multimedia and Expo (ICME) 2019 Hangqing Guo, Nan Zhang, Wenjun Shi, Saeed ALI-AlQarni, Shaoen Wu, Honggang Wang

Compared to traditional camera-based computer vision and imaging, radio imaging based on wireless sensing does not require lighting and is friendly to privacy.

RF-based Pose Estimation

Understanding and Mitigating the Security Risks of Voice-Controlled Third-Party Skills on Amazon Alexa and Google Home

no code implementations3 May 2018 Nan Zhang, Xianghang Mi, Xuan Feng, Xiao-Feng Wang, Yuan Tian, Feng Qian

The significance of our findings have already been acknowledged by Amazon and Google, and further evidenced by the risky skills discovered on Alexa and Google markets by the new detection systems we built.

Cryptography and Security

Fine-Grained Change Detection of Misaligned Scenes With Varied Illuminations

no code implementations ICCV 2015 Wei Feng, Fei-Peng Tian, Qian Zhang, Nan Zhang, Liang Wan, Jizhou Sun

To guarantee detection sensitivity and accuracy of minute changes, in an observation, we capture a group of images under multiple illuminations, which need only to be roughly aligned to the last time lighting conditions.

Change Detection

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