Search Results for author: Qin Li

Found 37 papers, 4 papers with code

AlphaCrystal-II: Distance matrix based crystal structure prediction using deep learning

no code implementations7 Apr 2024 Yuqi Song, Rongzhi Dong, Lai Wei, Qin Li, Jianjun Hu

Computational prediction of stable crystal structures has a profound impact on the large-scale discovery of novel functional materials.

Protein Structure Prediction

High-Discriminative Attribute Feature Learning for Generalized Zero-Shot Learning

no code implementations7 Apr 2024 Yu Lei, Guoshuai Sheng, Fangfang Li, Quanxue Gao, Cheng Deng, Qin Li

However, current attention-based models may overlook the transferability of visual features and the distinctiveness of attribute localization when learning regional features in images.

Attribute Generalized Zero-Shot Learning

A Good Score Does not Lead to A Good Generative Model

1 code implementation10 Jan 2024 Sixu Li, Shi Chen, Qin Li

In particular, it has been shown that SGMs can generate samples from a distribution that is close to the ground-truth if the underlying score function is learned well, suggesting the success of SGM as a generative model.

Density Estimation Memorization

IEKM: A Model Incorporating External Keyword Matrices

no code implementations21 Nov 2023 Cheng Luo, Qin Li, Zhao Yan, Mengliang Rao, Yunbo Cao

In this paper, we propose an incorporation external keywords matrices model (IEKM) to address these challenges.

Semantic Similarity Semantic Textual Similarity +2

Accelerating optimization over the space of probability measures

no code implementations6 Oct 2023 Shi Chen, Qin Li, Oliver Tse, Stephen J. Wright

Most research has focused on optimization over Euclidean spaces, but given the need to optimize over spaces of probability measures in many machine learning problems, it is of interest to investigate accelerated gradient methods in this context too.

Integrating LLM, EEG, and Eye-Tracking Biomarker Analysis for Word-Level Neural State Classification in Semantic Inference Reading Comprehension

no code implementations27 Sep 2023 Yuhong Zhang, Qin Li, Sujal Nahata, Tasnia Jamal, Shih-kuen Cheng, Gert Cauwenberghs, Tzyy-Ping Jung

With the recent proliferation of large language models (LLMs), such as Generative Pre-trained Transformers (GPT), there has been a significant shift in exploring human and machine comprehension of semantic language meaning.

EEG Feature Engineering +1

Beyond expectations: Residual Dynamic Mode Decomposition and Variance for Stochastic Dynamical Systems

1 code implementation21 Aug 2023 Matthew J. Colbrook, Qin Li, Ryan V. Raut, Alex Townsend

Finally, we present a suite of convergence results for the spectral information of stochastic Koopman operators.

MD-HIT: Machine learning for materials property prediction with dataset redundancy control

1 code implementation10 Jul 2023 Qin Li, Nihang Fu, Sadman Sadeed Omee, Jianjun Hu

This issue is well known in the field of bioinformatics for protein function prediction, in which a redundancy reduction procedure (CD-Hit) is always applied to reduce the sample redundancy by ensuring no pair of samples has a sequence similarity greater than a given threshold.

Property Prediction Protein Function Prediction

Correcting auto-differentiation in neural-ODE training

no code implementations3 Jun 2023 Yewei Xu, Shi Chen, Qin Li, Stephen J. Wright

Does the use of auto-differentiation yield reasonable updates to deep neural networks that represent neural ODEs?

A 3D grain-based reconstruction method from a 2D surface image for the Distinct Lattice Spring Model

no code implementations Numerical and Analytical Methods in Geomechanics 2023 Xin-DongWei, Zhi-Qiang Deng, Qin Li, Yan Huang, Gao-Feng Zhao

The 3D GBM reconstruction is generated by a simulated annealing algorithm, with the Monte Carlo algorithm extending the calculation of the two-point probability function as the target function to the random particle model.

Computational Efficiency

Spatial-temporal traffic modeling with a fusion graph reconstructed by tensor decomposition

no code implementations12 Dec 2022 Qin Li, Xuan Yang, Yong Wang, Yuankai Wu, Deqiang He

This paper proposes reconstructing the binary adjacency matrix via tensor decomposition, and a traffic flow forecasting method is proposed.

Open-Ended Question Answering Tensor Decomposition

A Deep Learning Approach to Generating Photospheric Vector Magnetograms of Solar Active Regions for SOHO/MDI Using SDO/HMI and BBSO Data

no code implementations4 Nov 2022 Haodi Jiang, Qin Li, Zhihang Hu, Nian Liu, Yasser Abduallah, Ju Jing, Genwei Zhang, Yan Xu, Wynne Hsu, Jason T. L. Wang, Haimin Wang

We propose a new deep learning method, named MagNet, to learn from combined LOS magnetograms, Bx and By taken by SDO/HMI along with H-alpha observations collected by the Big Bear Solar Observatory (BBSO), and to generate vector components Bx' and By', which would form vector magnetograms with observed LOS data.

Solar Flare Index Prediction Using SDO/HMI Vector Magnetic Data Products with Statistical and Machine Learning Methods

no code implementations28 Sep 2022 Hewei Zhang, Qin Li, Yanxing Yang, Ju Jing, Jason T. L. Wang, Haimin Wang, Zuofeng Shang

In addition, we sort the importance of SHARP parameters by Borda Count method calculated from the ranks that are rendered by 9 different machine learning methods.

regression

Predicting Solar Energetic Particles Using SDO/HMI Vector Magnetic Data Products and a Bidirectional LSTM Network

no code implementations27 Mar 2022 Yasser Abduallah, Vania K. Jordanova, Hao liu, Qin Li, Jason T. L. Wang, Haimin Wang

Solar energetic particles (SEPs) are an essential source of space radiation, which are hazards for humans in space, spacecraft, and technology in general.

On the Global Convergence of Gradient Descent for multi-layer ResNets in the mean-field regime

no code implementations6 Oct 2021 Zhiyan Ding, Shi Chen, Qin Li, Stephen Wright

Finding the optimal configuration of parameters in ResNet is a nonconvex minimization problem, but first-order methods nevertheless find the global optimum in the overparameterized regime.

Effective and Efficient Graph Learning for Multi-view Clustering

no code implementations15 Aug 2021 Quanxue Gao, Wei Xia, Xinbo Gao, Xiangdong Zhang, Qin Li, DaCheng Tao

Despite the impressive clustering performance and efficiency in characterizing both the relationship between data and cluster structure, existing graph-based multi-view clustering methods still have the following drawbacks.

Clustering Graph Learning

Tracing Halpha Fibrils through Bayesian Deep Learning

no code implementations16 Jul 2021 Haodi Jiang, Ju Jing, Jiasheng Wang, Chang Liu, Qin Li, Yan Xu, Jason T. L. Wang, Haimin Wang

Our method consists of a data pre-processing component that prepares training data from a threshold-based tool, a deep learning model implemented as a Bayesian convolutional neural network for probabilistic image segmentation with uncertainty quantification to predict fibrils, and a post-processing component containing a fibril-fitting algorithm to determine fibril orientations.

Image Segmentation Segmentation +2

Overparameterization of deep ResNet: zero loss and mean-field analysis

no code implementations30 May 2021 Zhiyan Ding, Shi Chen, Qin Li, Stephen Wright

Finding parameters in a deep neural network (NN) that fit training data is a nonconvex optimization problem, but a basic first-order optimization method (gradient descent) finds a global optimizer with perfect fit (zero-loss) in many practical situations.

A simple and robust method for noise variance estimation for time-varying signals

no code implementations7 Apr 2021 Qin Li, Junchan Zhao

In this brief paper, we present a simple approach to estimate the variance of measurement noise with time-varying 1-D signals.

Improving speech recognition models with small samples for air traffic control systems

no code implementations16 Feb 2021 Yi Lin, Qin Li, Bo Yang, Zhen Yan, Huachun Tan, Zhengmao Chen

By virtue of the common terminology used in the ATC domain, the transfer learning task can be regarded as a sub-domain adaption task, in which the transferred model is optimized using a joint corpus consisting of baseline samples and new transcribed samples from the target dataset.

Automatic Speech Recognition Automatic Speech Recognition (ASR) +3

Constrained Ensemble Langevin Monte Carlo

no code implementations8 Feb 2021 Zhiyan Ding, Qin Li

In particular, we find that if one directly surrogates the gradient using the ensemble approximation, the algorithm, termed Ensemble Langevin Monte Carlo, is unstable due to a high variance term.

I2UV-HandNet: Image-to-UV Prediction Network for Accurate and High-fidelity 3D Hand Mesh Modeling

no code implementations ICCV 2021 Ping Chen, Yujin Chen, Dong Yang, Fangyin Wu, Qin Li, Qingpei Xia, Yong Tan

Reconstructing a high-precision and high-fidelity 3D human hand from a color image plays a central role in replicating a realistic virtual hand in human-computer interaction and virtual reality applications.

Image Super-Resolution Image-to-Image Translation +1

Random Coordinate Underdamped Langevin Monte Carlo

no code implementations22 Oct 2020 Zhiyan Ding, Qin Li, Jianfeng Lu, Stephen J. Wright

We investigate the computational complexity of RC-ULMC and compare it with the classical ULMC for strongly log-concave probability distributions.

Random Coordinate Langevin Monte Carlo

no code implementations3 Oct 2020 Zhiyan Ding, Qin Li, Jianfeng Lu, Stephen J. Wright

We investigate the total complexity of RC-LMC and compare it with the classical LMC for log-concave probability distributions.

Langevin Monte Carlo: random coordinate descent and variance reduction

no code implementations26 Jul 2020 Zhiyan Ding, Qin Li

However, the method requires the evaluation of a full gradient in each iteration, and for a problem on $\mathbb{R}^d$, this amounts to $d$ times partial derivative evaluations per iteration.

Computational Efficiency

PAC Model Checking of Black-Box Continuous-Time Dynamical Systems

no code implementations17 Jul 2020 Bai Xue, Miaomiao Zhang, Arvind Easwaran, Qin Li

In this paper we present a novel model checking approach to finite-time safety verification of black-box continuous-time dynamical systems within the framework of probably approximately correct (PAC) learning.

Systems and Control Formal Languages and Automata Theory Systems and Control

A Survey on Machine Reading Comprehension: Tasks, Evaluation Metrics and Benchmark Datasets

no code implementations21 Jun 2020 Changchang Zeng, Shaobo Li, Qin Li, Jie Hu, Jianjun Hu

Machine Reading Comprehension (MRC) is a challenging Natural Language Processing(NLP) research field with wide real-world applications.

Machine Reading Comprehension

Variance reduction for Random Coordinate Descent-Langevin Monte Carlo

no code implementations NeurIPS 2020 Zhiyan Ding, Qin Li

The high variance induced by the randomness means a larger number of iterations are needed, and this balances out the saving in each iteration.

Non-recurrent Traffic Congestion Detection with a Coupled Scalable Bayesian Robust Tensor Factorization Model

no code implementations10 May 2020 Qin Li, Huachun Tan, Xizhu Jiang, Yuankai Wu, Linhui Ye

However, it remains a challenging task to construct an analytical framework through which the natural spatial-temporal structural properties of multivariable traffic information can be effectively represented and exploited to better understand and detect NRTC.

Tensor Decomposition

Classical limit for the varying-mass Schrödinger equation with random inhomogeneities

no code implementations12 Feb 2020 Shi Chen, Qin Li, Xu Yang

The varying-mass Schr\"odinger equation (VMSE) has been successfully applied to model electronic properties of semiconductor hetero-structures, for example, quantum dots and quantum wells.

Numerical Analysis Numerical Analysis

Error Lower Bounds of Constant Step-size Stochastic Gradient Descent

no code implementations18 Oct 2019 Zhiyan Ding, Yiding Chen, Qin Li, Xiaojin Zhu

To our knowledge, this is the first analysis for SGD error lower bound without the strong convexity assumption.

BIG-bench Machine Learning

A sparse decomposition of low rank symmetric positive semi-definite matrices

1 code implementation3 Jul 2016 Thomas Y. Hou, Qin Li, Pengchuan Zhang

In this paper, we partition the indices from 1 to $N$ into several patches and propose to quantify the sparseness of a vector by the number of patches on which it is nonzero, which is called patch-wise sparseness.

Numerical Analysis

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