Search Results for author: Junier B. Oliva

Found 26 papers, 11 papers with code

Phoneme Hallucinator: One-shot Voice Conversion via Set Expansion

1 code implementation11 Aug 2023 Siyuan Shan, Yang Li, Amartya Banerjee, Junier B. Oliva

Objective and subjective evaluations show that \textit{Phoneme Hallucinator} outperforms existing VC methods for both intelligibility and speaker similarity.

Voice Conversion

Distribution-based Sketching of Single-Cell Samples

1 code implementation30 Jun 2022 Vishal Athreya Baskaran, Jolene Ranek, Siyuan Shan, Natalie Stanley, Junier B. Oliva

Modern high-throughput single-cell immune profiling technologies, such as flow and mass cytometry and single-cell RNA sequencing can readily measure the expression of a large number of protein or gene features across the millions of cells in a multi-patient cohort.

Posterior Matching for Arbitrary Conditioning

1 code implementation28 Jan 2022 Ryan R. Strauss, Junier B. Oliva

Arbitrary conditioning is an important problem in unsupervised learning, where we seek to model the conditional densities $p(\mathbf{x}_u \mid \mathbf{x}_o)$ that underly some data, for all possible non-intersecting subsets $o, u \subset \{1, \dots , d\}$.

Density Estimation

Adversarial Scrubbing of Demographic Information for Text Classification

1 code implementation EMNLP 2021 Somnath Basu Roy Chowdhury, Sayan Ghosh, Yiyuan Li, Junier B. Oliva, Shashank Srivastava, Snigdha Chaturvedi

Contextual representations learned by language models can often encode undesirable attributes, like demographic associations of the users, while being trained for an unrelated target task.

text-classification Text Classification

Towards Robust Active Feature Acquisition

no code implementations9 Jul 2021 Yang Li, Siyuan Shan, Qin Liu, Junier B. Oliva

Our framework can easily handle a large number of features using a hierarchical acquisition policy and is more robust to OOD inputs with the help of an OOD detector for partially observed data.


Partially Observed Exchangeable Modeling

no code implementations11 Feb 2021 Yang Li, Junier B. Oliva

Modeling dependencies among features is fundamental for many machine learning tasks.


Arbitrary Conditional Distributions with Energy

1 code implementation NeurIPS 2021 Ryan R. Strauss, Junier B. Oliva

A more general and useful problem is arbitrary conditional density estimation, which aims to model any possible conditional distribution over a set of covariates, reflecting the more realistic setting of inference based on prior knowledge.

Arbitrary Conditional Density Estimation Imputation

NRTSI: Non-Recurrent Time Series Imputation

1 code implementation5 Feb 2021 Siyuan Shan, Yang Li, Junier B. Oliva

Time series imputation is a fundamental task for understanding time series with missing data.

Imputation Time Series +1

Active Feature Acquisition with Generative Surrogate Models

no code implementations6 Oct 2020 Yang Li, Junier B. Oliva

Many real-world situations allow for the acquisition of additional relevant information when making an assessment with limited or uncertain data.


Exchangeable Neural ODE for Set Modeling

no code implementations NeurIPS 2020 Yang Li, Haidong Yi, Christopher M. Bender, Siyuan Shan, Junier B. Oliva

Reasoning over an instance composed of a set of vectors, like a point cloud, requires that one accounts for intra-set dependent features among elements.

Dynamic Feature Acquisition with Arbitrary Conditional Flows

no code implementations13 Jun 2020 Yang Li, Junier B. Oliva

To trade off the improvement with the cost of acquisition, we leverage an information theoretic metric, conditional mutual information, to select the most informative feature to acquire.

Deep Goal-Oriented Clustering

no code implementations7 Jun 2020 Yifeng Shi, Christopher M. Bender, Junier B. Oliva, Marc Niethammer

Clustering and prediction are two primary tasks in the fields of unsupervised and supervised learning, respectively.


Defense Through Diverse Directions

no code implementations ICML 2020 Christopher M. Bender, Yang Li, Yifeng Shi, Michael K. Reiter, Junier B. Oliva

In this work we develop a novel Bayesian neural network methodology to achieve strong adversarial robustness without the need for online adversarial training.

Adversarial Robustness

Flow Models for Arbitrary Conditional Likelihoods

1 code implementation13 Sep 2019 Yang Li, Shoaib Akbar, Junier B. Oliva

Understanding the dependencies among features of a dataset is at the core of most unsupervised learning tasks.

Image Inpainting Imputation


1 code implementation NeurIPS 2019 Eunbyung Park, Junier B. Oliva

We propose meta-curvature (MC), a framework to learn curvature information for better generalization and fast model adaptation.

Few-Shot Image Classification Few-Shot Learning +1

A Forest from the Trees: Generation through Neighborhoods

no code implementations4 Feb 2019 Yang Li, Tianxiang Gao, Junier B. Oliva

In this work, we propose to learn a generative model using both learned features (through a latent space) and memories (through neighbors).

Transformation Autoregressive Networks

no code implementations ICML 2018 Junier B. Oliva, Avinava Dubey, Manzil Zaheer, Barnabás Póczos, Ruslan Salakhutdinov, Eric P. Xing, Jeff Schneider

Further, through a comprehensive study over both real world and synthetic data, we show for that jointly leveraging transformations of variables and autoregressive conditional models, results in a considerable improvement in performance.

Density Estimation Outlier Detection

The Statistical Recurrent Unit

2 code implementations ICML 2017 Junier B. Oliva, Barnabas Poczos, Jeff Schneider

Sophisticated gated recurrent neural network architectures like LSTMs and GRUs have been shown to be highly effective in a myriad of applications.

Bayesian Optimization

Deep Mean Maps

no code implementations13 Nov 2015 Junier B. Oliva, Danica J. Sutherland, Barnabás Póczos, Jeff Schneider

The use of distributions and high-level features from deep architecture has become commonplace in modern computer vision.

Linear-time Learning on Distributions with Approximate Kernel Embeddings

no code implementations24 Sep 2015 Danica J. Sutherland, Junier B. Oliva, Barnabás Póczos, Jeff Schneider

This work develops the first random features for pdfs whose dot product approximates kernels using these non-Euclidean metrics, allowing estimators using such kernels to scale to large datasets by working in a primal space, without computing large Gram matrices.

BIG-bench Machine Learning

FuSSO: Functional Shrinkage and Selection Operator

no code implementations10 Nov 2013 Junier B. Oliva, Barnabas Poczos, Timothy Verstynen, Aarti Singh, Jeff Schneider, Fang-Cheng Yeh, Wen-Yih Tseng

We present the FuSSO, a functional analogue to the LASSO, that efficiently finds a sparse set of functional input covariates to regress a real-valued response against.

Fast Distribution To Real Regression

no code implementations10 Nov 2013 Junier B. Oliva, Willie Neiswanger, Barnabas Poczos, Jeff Schneider, Eric Xing

We study the problem of distribution to real-value regression, where one aims to regress a mapping $f$ that takes in a distribution input covariate $P\in \mathcal{I}$ (for a non-parametric family of distributions $\mathcal{I}$) and outputs a real-valued response $Y=f(P) + \epsilon$.


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