Search Results for author: Ami Wiesel

Found 21 papers, 4 papers with code

Probabilistic Simplex Component Analysis by Importance Sampling

no code implementations22 Feb 2023 Nerya Granot, Tzvi Diskin, Nicolas Dobigeon, Ami Wiesel

In this paper we consider the problem of linear unmixing hidden random variables defined over the simplex with additive Gaussian noise, also known as probabilistic simplex component analysis (PRISM).

CFARnet: deep learning for target detection with constant false alarm rate

no code implementations4 Aug 2022 Tzvi Diskin, Yiftach Beer, Uri Okun, Ami Wiesel

We consider the problem of target detection with a constant false alarm rate (CFAR).

Learning to Detect with Constant False Alarm Rate

no code implementations12 Jun 2022 Tzvi Diskin, Uri Okun, Ami Wiesel

We consider the use of machine learning for hypothesis testing with an emphasis on target detection.

BIG-bench Machine Learning

On the Optimization Landscape of Maximum Mean Discrepancy

no code implementations26 Oct 2021 Itai Alon, Amir Globerson, Ami Wiesel

Our analysis shows that that the MMD optimization landscape is benign in these cases, and therefore gradient based methods will globally minimize the MMD objective.

Learning to Estimate Without Bias

1 code implementation24 Oct 2021 Tzvi Diskin, Yonina C. Eldar, Ami Wiesel

In such applications, we show that BCE leads to asymptotically consistent estimators.

Data Augmentation

Conditional Frechet Inception Distance

1 code implementation21 Mar 2021 Michael Soloveitchik, Tzvi Diskin, Efrat Morin, Ami Wiesel

We consider distance functions between conditional distributions.

Maximin Optimization for Binary Regression

no code implementations10 Oct 2020 Nisan Chiprut, Amir Globerson, Ami Wiesel

Interestingly, we prove that this approach is optimal in linear regression with low noise conditions as well as robust regression with a small number of outliers.

regression

Convex Nonparanormal Regression

no code implementations21 Apr 2020 Yonatan Woodbridge, Gal Elidan, Ami Wiesel

Quantifying uncertainty in predictions or, more generally, estimating the posterior conditional distribution, is a core challenge in machine learning and statistics.

regression

PnP-Net: A hybrid Perspective-n-Point Network

no code implementations10 Mar 2020 Roy Sheffer, Ami Wiesel

We consider the robust Perspective-n-Point (PnP) problem using a hybrid approach that combines deep learning with model based algorithms.

Fair Principal Component Analysis and Filter Design

no code implementations16 Feb 2020 Gad Zalcberg, Ami Wiesel

We analyze the landscape of the underlying optimization in the case of orthogonal targets.

Dimensionality Reduction Fairness

Globally Optimal Learning for Structured Elliptical Losses

1 code implementation NeurIPS 2019 Yoav Wald, Nofar Noy, Gal Elidan, Ami Wiesel

The core of the difficulty is the non-convexity of the objective function, implying that standard optimization algorithms may converge to sub-optimal critical points.

regression

Spectral Algorithm for Low-rank Multitask Regression

no code implementations27 Oct 2019 Yotam Gigi, Ami Wiesel, Sella Nevo, Gal Elidan, Avinatan Hassidim, Yossi Matias

In this scenario sharing a low-rank component between the tasks translates to a shared spectral reflection of the water, which is a true underlying physical model.

Image Classification regression

ML for Flood Forecasting at Scale

no code implementations28 Jan 2019 Sella Nevo, Vova Anisimov, Gal Elidan, Ran El-Yaniv, Pete Giencke, Yotam Gigi, Avinatan Hassidim, Zach Moshe, Mor Schlesinger, Guy Shalev, Ajai Tirumali, Ami Wiesel, Oleg Zlydenko, Yossi Matias

We propose to build on these strengths and develop ML systems for timely and accurate riverine flood prediction.

Towards Global Remote Discharge Estimation: Using the Few to Estimate The Many

no code implementations3 Jan 2019 Yotam Gigi, Gal Elidan, Avinatan Hassidim, Yossi Matias, Zach Moshe, Sella Nevo, Guy Shalev, Ami Wiesel

We demonstrate the efficacy of our approach for the problem of discharge estimation using simulations.

Learning to Detect

no code implementations19 May 2018 Neev Samuel, Tzvi Diskin, Ami Wiesel

In this paper we consider Multiple-Input-Multiple-Output (MIMO) detection using deep neural networks.

Deep MIMO Detection

3 code implementations4 Jun 2017 Neev Samuel, Tzvi Diskin, Ami Wiesel

In this paper, we consider the use of deep neural networks in the context of Multiple-Input-Multiple-Output (MIMO) detection.

Joint Inverse Covariances Estimation with Mutual Linear Structure

no code implementations20 Nov 2015 Ilya Soloveychik, Ami Wiesel

We consider the problem of joint estimation of structured inverse covariance matrices.

Tyler's Covariance Matrix Estimator in Elliptical Models with Convex Structure

no code implementations7 Apr 2014 Ilya Soloveychik, Ami Wiesel

We address structured covariance estimation in elliptical distributions by assuming that the covariance is a priori known to belong to a given convex set, e. g., the set of Toeplitz or banded matrices.

Group Symmetry and non-Gaussian Covariance Estimation

no code implementations18 Jun 2013 Ilya Soloveychik, Ami Wiesel

We consider robust covariance estimation with group symmetry constraints.

Marginal Likelihoods for Distributed Parameter Estimation of Gaussian Graphical Models

no code implementations19 Mar 2013 Zhaoshi Meng, Dennis Wei, Ami Wiesel, Alfred O. Hero III

In this paper, we propose a general framework for distributed estimation based on a maximum marginal likelihood (MML) approach.

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