Search Results for author: Václav Šmídl

Found 12 papers, 6 papers with code

Is AUC the best measure for practical comparison of anomaly detectors?

1 code implementation8 May 2023 Vít Škvára, Tomáš Pevný, Václav Šmídl

The area under receiver operating characteristics (AUC) is the standard measure for comparison of anomaly detectors.

Anomaly Detection

Fitting large mixture models using stochastic component selection

no code implementations NeurIPS 2021 Milan Papež, Tomáš Pevný, Václav Šmídl

The performance of our method is illustrated in a variety of synthetic and real-data contexts, considering deep models, such as mixtures of normalizing flows and sum-product (transform) networks.

Comparison of Anomaly Detectors: Context Matters

1 code implementation11 Dec 2020 Vít Škvára, Jan Franců, Matěj Zorek, Tomáš Pevný, Václav Šmídl

The objective of this comparison is twofold: to compare anomaly detection methods of various paradigms with focus on deep generative models, and identification of sources of variability that can yield different results.

Anomaly Detection Model Selection

DeepTopPush: Simple and Scalable Method for Accuracy at the Top

no code implementations22 Jun 2020 Václav Mácha, Lukáš Adam, Václav Šmídl

Accuracy at the top is a special class of binary classification problems where the performance is evaluated only on a small number of relevant (top) samples.

Binary Classification Information Retrieval +1

Expectation-Maximization Algorithm for Identification of Mesh-based Compartment Thermal Model of Power Modules

no code implementations12 Jun 2020 Jakub Ševčík, Václav Šmídl, Ondřej Straka

Recently, we have proposed a linear time invariant state-space thermal model based on a compartment representation and its identification procedure that is based on the Expectation-Maximization algorithm from incomplete temperature data.

Management

Neural Power Units

4 code implementations NeurIPS 2020 Niklas Heim, Tomáš Pevný, Václav Šmídl

Conventional Neural Networks can approximate simple arithmetic operations, but fail to generalize beyond the range of numbers that were seen during training.

Nonlinear classifiers for ranking problems based on kernelized SVM

2 code implementations26 Feb 2020 Václav Mácha, Lukáš Adam, Václav Šmídl

Many classification problems focus on maximizing the performance only on the samples with the highest relevance instead of all samples.

Classification General Classification

Rodent: Relevance determination in differential equations

no code implementations2 Dec 2019 Niklas Heim, Václav Šmídl, Tomáš Pevný

We aim to identify the generating, ordinary differential equation (ODE) from a set of trajectories of a partially observed system.

Anomaly scores for generative models

1 code implementation28 May 2019 Václav Šmídl, Jan Bím, Tomáš Pevný

Reconstruction error is a prevalent score used to identify anomalous samples when data are modeled by generative models, such as (variational) auto-encoders or generative adversarial networks.

Non-parametric Bayesian Models of Response Function in Dynamic Image Sequences

no code implementations19 Mar 2015 Ondřej Tichý, Václav Šmídl

Comparison of the resulting algorithms with these priors is performed on synthetic dataset as well as on real datasets from dynamic renal scintigraphy.

blind source separation

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