Search Results for author: Weijia Shao

Found 5 papers, 5 papers with code

Investigating the Corruption Robustness of Image Classifiers with Random Lp-norm Corruptions

1 code implementation9 May 2023 Georg Siedel, Weijia Shao, Silvia Vock, Andrey Morozov

In the field of adversarial robustness of image classifiers, robustness is commonly defined as the stability of a model to all input changes within a p-norm distance.

Adversarial Robustness Data Augmentation +1

Adaptive Stochastic Optimisation of Nonconvex Composite Objectives

1 code implementation21 Nov 2022 Weijia Shao, Fikret Sivrikaya, Sahin Albayrak

In this paper, we propose and analyse a family of generalised stochastic composite mirror descent algorithms.

Adaptive Zeroth-Order Optimisation of Nonconvex Composite Objectives

1 code implementation9 Aug 2022 Weijia Shao, Sahin Albayrak

In this paper, we propose and analyze algorithms for zeroth-order optimization of non-convex composite objectives, focusing on reducing the complexity dependence on dimensionality.

Optimistic Optimisation of Composite Objective with Exponentiated Update

1 code implementation8 Aug 2022 Weijia Shao, Fikret Sivrikaya, Sahin Albayrak

Furthermore, the algorithms have efficient implementations for popular composite objectives and constraints and can be converted to stochastic optimisation algorithms with the optimal accelerated rate for smooth objectives.

Graduated Optimization of Black-Box Functions

1 code implementation4 Jun 2019 Weijia Shao, Christian Geißler, Fikret Sivrikaya

Motivated by the problem of tuning hyperparameters in machine learning, we present a new approach for gradually and adaptively optimizing an unknown function using estimated gradients.

BIG-bench Machine Learning

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