Search Results for author: Bo Zhu

Found 29 papers, 12 papers with code

Reliability quality measures for recommender systems

no code implementations6 Feb 2024 Jesús Bobadilla, Abraham Gutierrez, Fernando Ortega, Bo Zhu

Both quality measures are based on the hypothesis that the more suitable a reliability measure is, the better accuracy results it will provide when applied.

Recommendation Systems

CF4J: Collaborative Filtering for Java

1 code implementation1 Feb 2024 Fernando Ortega, Bo Zhu, Jesus Bobadilla, Antonio Hernando

Recommender Systems (RS) provide a relevant tool to mitigate the information overload problem.

Collaborative Filtering Recommendation Systems

Fluid Simulation on Neural Flow Maps

no code implementations22 Dec 2023 Yitong Deng, Hong-Xing Yu, Diyang Zhang, Jiajun Wu, Bo Zhu

We introduce Neural Flow Maps, a novel simulation method bridging the emerging paradigm of implicit neural representations with fluid simulation based on the theory of flow maps, to achieve state-of-the-art simulation of inviscid fluid phenomena.

Inferring Hybrid Neural Fluid Fields from Videos

no code implementations NeurIPS 2023 Hong-Xing Yu, Yang Zheng, Yuan Gao, Yitong Deng, Bo Zhu, Jiajun Wu

Specifically, to deal with visual ambiguities of fluid velocity, we introduce a set of physics-based losses that enforce inferring a physically plausible velocity field, which is divergence-free and drives the transport of density.

Dynamic Reconstruction Future prediction

SkyMath: Technical Report

1 code implementation25 Oct 2023 Liu Yang, Haihua Yang, Wenjun Cheng, Lei Lin, Chenxia Li, Yifu Chen, Lunan Liu, Jianfei Pan, Tianwen Wei, Biye Li, Liang Zhao, Lijie Wang, Bo Zhu, Guoliang Li, Xuejie Wu, Xilin Luo, Rui Hu

Large language models (LLMs) have shown great potential to solve varieties of natural language processing (NLP) tasks, including mathematical reasoning.

GSM8K Language Modelling +2

Uncertainty Estimation and Out-of-Distribution Detection for Deep Learning-Based Image Reconstruction using the Local Lipschitz

no code implementations12 May 2023 Danyal F. Bhutto, Bo Zhu, Jeremiah Z. Liu, Neha Koonjoo, Hongwei B. Li, Bruce R. Rosen, Matthew S. Rosen

We compare our proposed approach with baseline methods: Monte-Carlo dropout and deep ensembles, and further analysis included MRI denoising and Computed Tomography (CT) sparse-to-full view reconstruction using UNET architectures.

Computed Tomography (CT) Data Augmentation +3

Neural Partial Differential Equations with Functional Convolution

no code implementations10 Mar 2023 Ziqian Wu, Xingzhe He, Yijun Li, Cheng Yang, Rui Liu, Shiying Xiong, Bo Zhu

We present a lightweighted neural PDE representation to discover the hidden structure and predict the solution of different nonlinear PDEs.

FluidLab: A Differentiable Environment for Benchmarking Complex Fluid Manipulation

1 code implementation4 Mar 2023 Zhou Xian, Bo Zhu, Zhenjia Xu, Hsiao-Yu Tung, Antonio Torralba, Katerina Fragkiadaki, Chuang Gan

We identify several challenges for fluid manipulation learning by evaluating a set of reinforcement learning and trajectory optimization methods on our platform.

Benchmarking

Learning Vortex Dynamics for Fluid Inference and Prediction

no code implementations27 Jan 2023 Yitong Deng, Hong-Xing Yu, Jiajun Wu, Bo Zhu

We propose a novel differentiable vortex particle (DVP) method to infer and predict fluid dynamics from a single video.

Future prediction

EASpace: Enhanced Action Space for Policy Transfer

1 code implementation7 Dec 2022 Zheng Zhang, Qingrui Zhang, Bo Zhu, Xiaohan Wang, Tianjiang Hu

In this paper, a novel algorithm named EASpace (Enhanced Action Space) is proposed, which formulates macro actions in an alternative form to accelerate the learning process using multiple available sub-optimal expert policies.

Q-Learning Transfer Learning

FSID: Fully Synthetic Image Denoising via Procedural Scene Generation

1 code implementation7 Dec 2022 Gyeongmin Choe, Beibei Du, Seonghyeon Nam, Xiaoyu Xiang, Bo Zhu, Rakesh Ranjan

To address this, we have developed a procedural synthetic data generation pipeline and dataset tailored to low-level vision tasks.

Image Denoising Scene Generation +1

Symplectically Integrated Symbolic Regression of Hamiltonian Dynamical Systems

no code implementations4 Sep 2022 Daniel M. DiPietro, Bo Zhu

Here we present Symplectically Integrated Symbolic Regression (SISR), a novel technique for learning physical governing equations from data.

regression Symbolic Regression

Learning Spatio-Temporal Downsampling for Effective Video Upscaling

no code implementations15 Mar 2022 Xiaoyu Xiang, Yapeng Tian, Vijay Rengarajan, Lucas Young, Bo Zhu, Rakesh Ranjan

Consequently, the inverse task of upscaling a low-resolution, low frame-rate video in space and time becomes a challenging ill-posed problem due to information loss and aliasing artifacts.

Quantization

On Real-time Image Reconstruction with Neural Networks for MRI-guided Radiotherapy

no code implementations10 Feb 2022 David E. J. Waddington, Nicholas Hindley, Neha Koonjoo, Christopher Chiu, Tess Reynolds, Paul Z. Y. Liu, Bo Zhu, Danyal Bhutto, Chiara Paganelli, Paul J. Keall, Matthew S. Rosen

The gold-standard for reconstruction of undersampled MR data is compressed sensing (CS) which is computationally slow and limits the rate that images can be available for real-time adaptation.

Image Reconstruction

Tree frog-inspired nanopillar arrays for enhancement of adhesion and friction

no code implementations4 Mar 2021 Zhekun Shi, Di Tan, Quan Liu, Fandong Meng, Bo Zhu, Longjian Xue

Bioinspired structure adhesives have received increasing interest for many applications, such as climbing robots and medical devices.

Soft Condensed Matter

VortexNet: Learning Complex Dynamic Systems with Physics-Embedded Networks

no code implementations1 Jan 2021 Shiying Xiong, Xingzhe He, Yunjin Tong, Yitong Deng, Bo Zhu

Since the number of such vortices are much smaller than that of the Eulerian, grid discretization, this Lagrangian discretization in essence encodes the system dynamics on a compact physics-based latent space.

Nonseparable Symplectic Neural Networks

no code implementations ICLR 2021 Shiying Xiong, Yunjin Tong, Xingzhe He, Shuqi Yang, Cheng Yang, Bo Zhu

The enabling mechanics of our approach is an augmented symplectic time integrator to decouple the position and momentum energy terms and facilitate their evolution.

Position

Learning Physical Constraints with Neural Projections

1 code implementation NeurIPS 2020 Shuqi Yang, Xingzhe He, Bo Zhu

A neural projection operator lies at the heart of our approach, composed of a lightweight network with an embedded recursive architecture that interactively enforces learned underpinning constraints and predicts the various governed behaviors of different physical systems.

Sparse Symplectically Integrated Neural Networks

1 code implementation NeurIPS 2020 Daniel M. DiPietro, Shiying Xiong, Bo Zhu

We introduce Sparse Symplectically Integrated Neural Networks (SSINNs), a novel model for learning Hamiltonian dynamical systems from data.

RoeNets: Predicting Discontinuity of Hyperbolic Systems from Continuous Data

no code implementations7 Jun 2020 Shiying Xiong, Xingzhe He, Yunjin Tong, Runze Liu, Bo Zhu

The ability of our model to predict long-term discontinuity from a short window of continuous training data is in general considered impossible using traditional machine learning approaches.

Neural Vortex Method: from Finite Lagrangian Particles to Infinite Dimensional Eulerian Dynamics

no code implementations7 Jun 2020 Shiying Xiong, Xingzhe He, Yunjin Tong, Yitong Deng, Bo Zhu

To tackle this challenge, we propose a novel learning-based framework, the Neural Vortex Method (NVM), which builds a neural-network description of the Lagrangian vortex structures and their interaction dynamics to reconstruct the high-resolution Eulerian flow field in a physically-precise manner.

Symplectic Neural Networks in Taylor Series Form for Hamiltonian Systems

1 code implementation11 May 2020 Yunjin Tong, Shiying Xiong, Xingzhe He, Guanghan Pan, Bo Zhu

We propose an effective and lightweight learning algorithm, Symplectic Taylor Neural Networks (Taylor-nets), to conduct continuous, long-term predictions of a complex Hamiltonian dynamic system based on sparse, short-term observations.

Lagrangian-Eulerian Multi-Density Topology Optimization with the Material Point Method

2 code implementations2 Mar 2020 Yue Li, Xuan Li, Minchen Li, Yixin Zhu, Bo Zhu, Chenfanfu Jiang

A quadrature-level connectivity graph-based method is adopted to avoid the artificial checkerboard issues commonly existing in multi-resolution topology optimization methods.

Computational Physics Computational Engineering, Finance, and Science Graphics

AdvectiveNet: An Eulerian-Lagrangian Fluidic reservoir for Point Cloud Processing

1 code implementation ICLR 2020 Xingzhe He, Helen Lu Cao, Bo Zhu

This paper presents a novel physics-inspired deep learning approach for point cloud processing motivated by the natural flow phenomena in fluid mechanics.

Point Cloud Classification

MR fingerprinting Deep RecOnstruction NEtwork (DRONE)

no code implementations15 Oct 2017 Ouri Cohen, Bo Zhu, Matthew S. Rosen

The accuracy of the NN reconstruction of noisy data is compared to conventional MRF template matching as a function of training data size, and quantified in a both simulated numerical brain phantom data and acquired data from the ISMRM/NIST phantom.

Template Matching

Image reconstruction by domain transform manifold learning

1 code implementation28 Apr 2017 Bo Zhu, Jeremiah Z. Liu, Bruce R. Rosen, Matthew S. Rosen

Image reconstruction plays a critical role in the implementation of all contemporary imaging modalities across the physical and life sciences including optical, MRI, CT, PET, and radio astronomy.

Astronomy Image Reconstruction

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