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This study proposes a new generative adversarial network (GAN) for generating realistic orders in financial markets. In some previous works, GANs for financial markets generated fake orders in continuous spaces because of GAN architectures'…

Machine Learning · Computer Science 2022-04-29 Masanori Hirano , Hiroki Sakaji , Kiyoshi Izumi

Cyber-physical systems (CPS), such as automotive systems, are starting to include sophisticated machine learning (ML) components. Their correctness, therefore, depends on properties of the inner ML modules. While learning algorithms aim to…

Systems and Control · Computer Science 2018-12-20 Tommaso Dreossi , Alexandre Donzé , Sanjit A. Seshia

We show that the Quantum Generative Adversarial Network (QGAN) paradigm can be employed by an adversary to learn generating data that deceives the monitoring of a Cyber-Physical System (CPS) and to perpetrate a covert attack. As a test…

Cryptography and Security · Computer Science 2019-11-12 Michel Barbeau , Joaquin Garcia-Alfaro

In the past few years, consumer review sites have become the main target of deceptive opinion spam, where fictitious opinions or reviews are deliberately written to sound authentic. Most of the existing work to detect the deceptive reviews…

Cryptography and Security · Computer Science 2018-05-29 Hojjat Aghakhani , Aravind Machiry , Shirin Nilizadeh , Christopher Kruegel , Giovanni Vigna

Generative Adversarial Networks (GANs) are a well-known technique that is trained on samples (e.g. pictures of fruits) and which after training is able to generate realistic new samples. Conditional GANs (CGANs) additionally provide label…

Computer Vision and Pattern Recognition · Computer Science 2020-05-28 Maximilian Bachl , Daniel C. Ferreira

Generative adversarial networks (GANs) have been shown to provide an effective way to model complex distributions and have obtained impressive results on various challenging tasks. However, typical GANs require fully-observed data during…

Machine Learning · Computer Science 2019-02-27 Steven Cheng-Xian Li , Bo Jiang , Benjamin Marlin

The rigorous safety verification of control systems in critical applications is essential, given their increasing complexity and integration into everyday life. Simulation-based falsification approaches play a pivotal role in the safety…

Systems and Control · Electrical Eng. & Systems 2024-03-13 Joshua Yancosek , Ali Baheri

Auto-encoding generative adversarial networks (GANs) combine the standard GAN algorithm, which discriminates between real and model-generated data, with a reconstruction loss given by an auto-encoder. Such models aim to prevent mode…

Machine Learning · Statistics 2017-10-24 Mihaela Rosca , Balaji Lakshminarayanan , David Warde-Farley , Shakir Mohamed

Generative Adversarial Networks (GANs) struggle to generate structured objects like molecules and game maps. The issue is that structured objects must satisfy hard requirements (e.g., molecules must be chemically valid) that are difficult…

Machine Learning · Computer Science 2020-12-01 Luca Di Liello , Pierfrancesco Ardino , Jacopo Gobbi , Paolo Morettin , Stefano Teso , Andrea Passerini

Purpose: To objectively assess new medical imaging technologies via computer-simulations, it is important to account for the variability in the ensemble of objects to be imaged. This source of variability can be described by stochastic…

Image and Video Processing · Electrical Eng. & Systems 2022-03-01 Weimin Zhou , Sayantan Bhadra , Frank J. Brooks , Hua Li , Mark A. Anastasio

Automated defect inspection is critical for effective and efficient maintenance, repair, and operations in advanced manufacturing. On the other hand, automated defect inspection is often constrained by the lack of defect samples, especially…

Computer Vision and Pattern Recognition · Computer Science 2021-03-30 Gongjie Zhang , Kaiwen Cui , Tzu-Yi Hung , Shijian Lu

We propose an approach to generate realistic and high-fidelity stock market data based on generative adversarial networks (GANs). Our Stock-GAN model employs a conditional Wasserstein GAN to capture history dependence of orders. The…

Statistical Finance · Quantitative Finance 2020-06-09 Junyi Li , Xitong Wang , Yaoyang Lin , Arunesh Sinha , Micheal P. Wellman

The advent of Generative Adversarial Networks (GANs) has brought about completely novel ways of transforming and manipulating pixels in digital images. GAN based techniques such as Image-to-Image translations, DeepFakes, and other automated…

Computer Vision and Pattern Recognition · Computer Science 2019-10-04 Lakshmanan Nataraj , Tajuddin Manhar Mohammed , Shivkumar Chandrasekaran , Arjuna Flenner , Jawadul H. Bappy , Amit K. Roy-Chowdhury , B. S. Manjunath

Conditional Generative Adversarial Networks (cGAN) were designed to generate images based on the provided conditions, \eg, class-level distributions. However, existing methods have used the same generating architecture for all classes. This…

Computer Vision and Pattern Recognition · Computer Science 2021-04-07 Peng Zhou , Lingxi Xie , Xiaopeng Zhang , Bingbing Ni , Qi Tian

Recently, generative machine-learning models have gained popularity in physics, driven by the goal of improving the efficiency of Markov chain Monte Carlo techniques and of exploring their potential in capturing experimental data…

Statistical Mechanics · Physics 2021-09-03 Japneet Singh , Vipul Arora , Vinay Gupta , Mathias S. Scheurer

Uncertainty is ubiquitous with flow in subsurface rocks because of their inherent heterogeneity and lack of in-situ measurements. To complete uncertainty analysis in a multi-scale manner, it is a prerequisite to provide sufficient rock…

Computer Vision and Pattern Recognition · Computer Science 2022-06-14 Qiang Zheng , Dongxiao Zhang

Many mathematical optimization algorithms fail to sufficiently explore the solution space of high-dimensional nonlinear optimization problems due to the curse of dimensionality. This paper proposes generative models as a complement to…

Neural and Evolutionary Computing · Computer Science 2021-05-05 Pouya Rezazadeh Kalehbasti , Michael D. Lepech , Samarpreet Singh Pandher

This work introduces a novel system for the generation of images that contain multiple classes of objects. Recent work in Generative Adversarial Networks have produced high quality images, but many focus on generating images of a single…

Machine Learning · Computer Science 2019-11-11 Elijah D. Bolluyt , Cristina Comaniciu

We propose to improve unconditional Generative Adversarial Networks (GAN) by training the self-supervised learning with the adversarial process. In particular, we apply self-supervised learning via the geometric transformation on input…

Computer Vision and Pattern Recognition · Computer Science 2019-05-15 Ngoc-Trung Tran , Viet-Hung Tran , Ngoc-Bao Nguyen , Ngai-Man Cheung

Cyber-Physical Systems (CPSs) are systems with both physical and software components, for example cars and industrial robots. Since these systems exhibit both discrete and continuous dynamics, they are complex and it is thus difficult to…

Systems and Control · Electrical Eng. & Systems 2019-10-21 Johan Lidén Eddeland , Koen Claessen , Nicholas Smallbone , Zahra Ramezani , Sajed Miremadi , Knut Åkesson