Search Results for author: Xiaoxuan Zhang

Found 11 papers, 1 papers with code

Multisource Semisupervised Adversarial Domain Generalization Network for Cross-Scene Sea-Land Clutter Classification

no code implementations9 Feb 2024 Xiaoxuan Zhang, Quan Pan, Salvador García

MSADGN can extract domain-invariant and domain-specific features from one labeled source domain and multiple unlabeled source domains, and then generalize these features to an arbitrary unseen target domain for real-time prediction of sea\textendash land clutter.

Domain Generalization Generative Adversarial Network

Data Augmentation and Classification of Sea-Land Clutter for Over-the-Horizon Radar Using AC-VAEGAN

no code implementations3 Jan 2023 Xiaoxuan Zhang, Zengfu Wang, Kun Lu, Quan Pan

Using a dataset of OTHR sea-land clutter, both the quality of the synthetic samples and the performance of data augmentation of AC-VAEGAN are verified.

Classification Data Augmentation +1

A heteroencoder architecture for prediction of failure locations in porous metals using variational inference

no code implementations31 Jan 2022 Wyatt Bridgman, Xiaoxuan Zhang, Greg Teichert, Mohammad Khalil, Krishna Garikipati, Reese Jones

In this work we employ an encoder-decoder convolutional neural network to predict the failure locations of porous metal tension specimens based only on their initial porosities.

Decoder Variational Inference

There Once Was a Really Bad Poet, It Was Automated but You Didn't Know It

1 code implementation5 Mar 2021 Jianyou Wang, Xiaoxuan Zhang, Yuren Zhou, Christopher Suh, Cynthia Rudin

Limerick generation exemplifies some of the most difficult challenges faced in poetry generation, as the poems must tell a story in only five lines, with constraints on rhyme, stress, and meter.

Biomembranes undergo complex, non-axisymmetric deformations governed by Kirchhoff-Love kinematics and revealed by a three dimensional computational framework

no code implementations28 Jan 2021 Debabrata Auddya, Xiaoxuan Zhang, Rahul Gulati, Ritvik Vasan, Krishna Garikipati, Padmini Rangamani, Shiva Rudraraju

Lipid bilayers are represented as spline-based surfaces immersed in a 3D space; this enables modeling of a wide spectrum of membrane geometries, boundary conditions, and deformations that are physically admissible in a 3D space.

Bayesian neural networks for weak solution of PDEs with uncertainty quantification

no code implementations13 Jan 2021 Xiaoxuan Zhang, Krishna Garikipati

As both Dirichlet and Neumann BCs are specified as inputs to NNs, a single NN can solve for similar physics, but with different BCs and on a number of problem domains.

Decision Making Uncertainty Quantification

System inference for the spatio-temporal evolution of infectious diseases: Michigan in the time of COVID-19

no code implementations2 Jul 2020 Zhenlin Wang, Xiaoxuan Zhang, Gregory Teichert, Mariana Carrasco-Teja, Krishna Garikipati

We extend the classical SIR model of infectious disease spread to account for time dependence in the parameters, which also include diffusivities.

Faster Online Learning of Optimal Threshold for Consistent F-measure Optimization

no code implementations NeurIPS 2018 Xiaoxuan Zhang, Mingrui Liu, Xun Zhou, Tianbao Yang

To advance OFO, we propose an efficient online algorithm based on simultaneously learning a posterior probability of class and learning an optimal threshold by minimizing a stochastic strongly convex function with unknown strong convexity parameter.

Fast Stochastic AUC Maximization with $O(1/n)$-Convergence Rate

no code implementations ICML 2018 Mingrui Liu, Xiaoxuan Zhang, Zaiyi Chen, Xiaoyu Wang, Tianbao Yang

In this paper, we consider statistical learning with AUC (area under ROC curve) maximization in the classical stochastic setting where one random data drawn from an unknown distribution is revealed at each iteration for updating the model.

Fast Rates of ERM and Stochastic Approximation: Adaptive to Error Bound Conditions

no code implementations NeurIPS 2018 Mingrui Liu, Xiaoxuan Zhang, Lijun Zhang, Rong Jin, Tianbao Yang

Error bound conditions (EBC) are properties that characterize the growth of an objective function when a point is moved away from the optimal set.

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