Search Results for author: Zhiwei Zhang

Found 29 papers, 9 papers with code

First Mapping the Canopy Height of Primeval Forests in the Tallest Tree Area of Asia

no code implementations23 Apr 2024 Guangpeng Fan, Fei Yan, Xiangquan Zeng, Qingtao Xu, Ruoyoulan Wang, Binghong Zhang, Jialing Zhou, Liangliang Nan, Jinhu Wang, Zhiwei Zhang, Jia Wang

We proposed a method to map the canopy height of the primeval forest within the world-level giant tree distribution area by using a spaceborne LiDAR fusion satellite imagery (Global Ecosystem Dynamics Investigation (GEDI), ICESat-2, and Sentinel-2) driven deep learning modeling.

HGS-Mapping: Online Dense Mapping Using Hybrid Gaussian Representation in Urban Scenes

no code implementations29 Mar 2024 Ke wu, Kaizhao Zhang, Zhiwei Zhang, Shanshuai Yuan, Muer Tie, Julong Wei, Zijun Xu, Jieru Zhao, Zhongxue Gan, Wenchao Ding

However, integrating 3DGS into a street-view dense mapping framework still faces two challenges, including incomplete reconstruction due to the absence of geometric information beyond the LiDAR coverage area and extensive computation for reconstruction in large urban scenes.

Autonomous Vehicles Scene Understanding

TBI Image/Text (TBI-IT): Comprehensive Text and Image Datasets for Traumatic Brain Injury Research

no code implementations14 Mar 2024 Jie Li, Jiaying Wen, Tongxin Yang, Fenglin Cai, Miao Wei, Zhiwei Zhang, Li Jiang

In this paper, we introduce a new dataset in the medical field of Traumatic Brain Injury (TBI), called TBI-IT, which includes both electronic medical records (EMRs) and head CT images.

Image Segmentation named-entity-recognition +2

Overcoming Pitfalls in Graph Contrastive Learning Evaluation: Toward Comprehensive Benchmarks

no code implementations24 Feb 2024 Qian Ma, Hongliang Chi, Hengrui Zhang, Kay Liu, Zhiwei Zhang, Lu Cheng, Suhang Wang, Philip S. Yu, Yao Ma

The rise of self-supervised learning, which operates without the need for labeled data, has garnered significant interest within the graph learning community.

Contrastive Learning Graph Learning +1

Test-Time Compensated Representation Learning for Extreme Traffic Forecasting

no code implementations16 Sep 2023 Zhiwei Zhang, Weizhong Zhang, Yaowei Huang, Kani Chen

In this paper, we identify an underexplored problem in multivariate traffic series prediction: extreme events.

Representation Learning

Massively Parallel Continuous Local Search for Hybrid SAT Solving on GPUs

no code implementations29 Aug 2023 Yunuo Cen, Zhiwei Zhang, Xuanyao Fong

Although state-of-the-art (SOTA) SAT solvers based on conflict-driven clause learning (CDCL) have achieved remarkable engineering success, their sequential nature limits the parallelism that may be extracted for acceleration on platforms such as the graphics processing unit (GPU).

Accountable Textual-Visual Chat Learns to Reject Human Instructions in Image Re-creation

2 code implementations10 Mar 2023 Zhiwei Zhang, Yuliang Liu

This stream is subsequently fed into the decoder-based transformer to generate visual re-creations and textual feedback in the second stage.

multimodal generation Text-to-Image Generation +1

Solving Quantum-Inspired Perfect Matching Problems via Tutte's Theorem-Based Hybrid Boolean Constraints

no code implementations24 Jan 2023 Moshe Y. Vardi, Zhiwei Zhang

While general-purpose hybrid constraint solvers can be powerful, we show that direct encodings of the constrained-matching problem as hybrid constraints scale poorly and special techniques are still needed.

DPMS: An ADD-Based Symbolic Approach for Generalized MaxSAT Solving

no code implementations8 May 2022 Anastasios Kyrillidis, Moshe Y. Vardi, Zhiwei Zhang

They lack, however, the ability to handle 1) (non-CNF) hybrid constraints, such as XORs and 2) generalized MaxSAT problems natively.

You Only Need End-to-End Training for Long-Tailed Recognition

no code implementations11 Dec 2021 Zhiwei Zhang

The generalization gap on the long-tailed data sets is largely owing to most categories only occupying a few training samples.

CoMPS: Continual Meta Policy Search

no code implementations ICLR 2022 Glen Berseth, Zhiwei Zhang, Grace Zhang, Chelsea Finn, Sergey Levine

Beyond simply transferring past experience to new tasks, our goal is to devise continual reinforcement learning algorithms that learn to learn, using their experience on previous tasks to learn new tasks more quickly.

Continual Learning Continuous Control +5

FedProc: Prototypical Contrastive Federated Learning on Non-IID data

1 code implementation25 Sep 2021 Xutong Mu, Yulong Shen, Ke Cheng, Xueli Geng, Jiaxuan Fu, Tao Zhang, Zhiwei Zhang

In this paper, we propose FedProc: prototypical contrastive federated learning, which is a simple and effective federated learning framework.

Federated Learning Image Classification

New Perspective on Progressive GANs Distillation for One-class Novelty Detection

no code implementations15 Sep 2021 Zhiwei Zhang, Yu Dong, Hanyu Peng, Shifeng Chen

One-class novelty detection is conducted to identify anomalous instances, with different distributions from the expected normal instances.

Generative Adversarial Network Knowledge Distillation +1

Abstract, Rationale, Stance: A Joint Model for Scientific Claim Verification

1 code implementation EMNLP 2021 Zhiwei Zhang, Jiyi Li, Fumiyo Fukumoto, Yanming Ye

In addition, we enhance the information exchanges and constraints among tasks by proposing a regularization term between the sentence attention scores of abstract retrieval and the estimated outputs of rational selection.

Claim Verification Machine Reading Comprehension +2

A Cascaded Zoom-In Network for Patterned Fabric Defect Detection

no code implementations15 Aug 2021 Zhiwei Zhang

With the observation that most fabrics are defect free in practice, a two-step Cascaded Zoom-In Network (CZI-Net) is proposed for patterned fabric defect detection.

Defect Detection

Instance-weighted Central Similarity for Multi-label Image Retrieval

no code implementations11 Aug 2021 Zhiwei Zhang, Hanyu Peng

Deep hashing has been widely applied to large-scale image retrieval by encoding high-dimensional data points into binary codes for efficient retrieval.

Deep Hashing Multi-Label Image Retrieval

Momentum-inspired Low-Rank Coordinate Descent for Diagonally Constrained SDPs

no code implementations16 Jun 2021 Junhyung Lyle Kim, Jose Antonio Lara Benitez, Mohammad Taha Toghani, Cameron Wolfe, Zhiwei Zhang, Anastasios Kyrillidis

We present a novel, practical, and provable approach for solving diagonally constrained semi-definite programming (SDP) problems at scale using accelerated non-convex programming.

Embedded Knowledge Distillation in Depth-Level Dynamic Neural Network

no code implementations1 Mar 2021 Qi Zhao, Shuchang Lyu, Zhiwei Zhang, Ting-Bing Xu, Guangliang Cheng

In real applications, different computation-resource devices need different-depth networks (e. g., ResNet-18/34/50) with high-accuracy.

Knowledge Distillation Transfer Learning

On Continuous Local BDD-Based Search for Hybrid SAT Solving

1 code implementation14 Dec 2020 Anastasios Kyrillidis, Moshe Y. Vardi, Zhiwei Zhang

We explore the potential of continuous local search (CLS) in SAT solving by proposing a novel approach for finding a solution of a hybrid system of Boolean constraints.

P-KDGAN: Progressive Knowledge Distillation with GANs for One-class Novelty Detection

no code implementations14 Jul 2020 Zhiwei Zhang, Shifeng Chen, Lei Sun

The progressive learning of knowledge distillation is a two-step approach that continuously improves the performance of the student GAN and achieves better performance than single step methods.

Knowledge Distillation Novelty Detection +1

Joint Embedding in Named Entity Linking on Sentence Level

no code implementations12 Feb 2020 Wei Shi, Si-Yuan Zhang, Zhiwei Zhang, Hong Cheng, Jeffrey Xu Yu

The named entity linking is challenging, given the fact that there are multiple candidate entities for a mention in a document.

Entity Linking Knowledge Graphs +1

FourierSAT: A Fourier Expansion-Based Algebraic Framework for Solving Hybrid Boolean Constraints

2 code implementations2 Dec 2019 Anastasios Kyrillidis, Anshumali Shrivastava, Moshe Y. Vardi, Zhiwei Zhang

By such a reduction to continuous optimization, we propose an algebraic framework for solving systems consisting of different types of constraints.

Ranking Preserving Hashing for Fast Similarity Search

no code implementations AAAI 2015 Qifan Wang, Zhiwei Zhang, Luo Si

But in many real world applications, ranking measure is important for evaluating the quality of hashing codes. In this paper, we propose a novel Ranking Preserving Hashing (RPH) approach that directly optimizes a popular ranking measure, Normalized Discounted Cumulative Gain (NDCG), to obtain effective hashing codes with high ranking accuracy.

Computational Efficiency

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