Search Results for author: Christian Wagner

Found 24 papers, 3 papers with code

Gradient-based Fuzzy System Optimisation via Automatic Differentiation -- FuzzyR as a Use Case

no code implementations18 Mar 2024 Chao Chen, Christian Wagner, Jonathan M. Garibaldi

Since their introduction, fuzzy sets and systems have become an important area of research known for its versatility in modelling, knowledge representation and reasoning, and increasingly its potential within the context explainable AI.

The Joint Weighted Average (JWA) Operator

no code implementations23 Feb 2023 Stephen B. Broomell, Christian Wagner

Information aggregation is a vital tool for human and machine decision making, especially in the presence of noise and uncertainty.

Attribute Decision Making

Quantification of Robotic Surgeries with Vision-Based Deep Learning

no code implementations6 May 2022 Dani Kiyasseh, Runzhuo Ma, Taseen F. Haque, Jessica Nguyen, Christian Wagner, Animashree Anandkumar, Andrew J. Hung

We believe this is a prerequisite for the provision of surgical feedback and modulation of surgeon performance in pursuit of improved patient outcomes.

Navigate Skills Assessment +1

Towards Handling Uncertainty-at-Source in AI -- A Review and Next Steps for Interval Regression

no code implementations15 Apr 2021 Shaily Kabir, Christian Wagner, Zack Ellerby

Increasingly, however, research is focusing upon uncertainty arising at the level of individual measurements (i. e., within- or intra-source), such as for a given sensor output or human response.

regression

Vortical flow structures induced by red blood cells in capillaries

no code implementations25 Feb 2021 François Yaya, Johannes Römer, Achim Guckenberger, Thomas John, Stephan Gekle, Thomas Podgorski, Christian Wagner

We conduct an experimental study on the flow field around red blood cells in capillary flow that are complemented by simulations of vortical flow between red blood cells.

Biological Physics Fluid Dynamics Cell Behavior

Disaster Resilience and Asset Prices

no code implementations18 May 2020 Marco Pagano, Christian Wagner, Josef Zechner

This paper investigates whether security markets price the effect of social distancing on firms' operations.

A generic ensemble based deep convolutional neural network for semi-supervised medical image segmentation

1 code implementation16 Apr 2020 Ruizhe Li, Dorothee Auer, Christian Wagner, Xin Chen

To address this problem, we propose a generic semi-supervised learning framework for image segmentation based on a deep convolutional neural network (DCNN).

Image Segmentation Lesion Segmentation +5

Autonomous robotic nanofabrication with reinforcement learning

1 code implementation27 Feb 2020 Philipp Leinen, Malte Esders, Kristof T. Schütt, Christian Wagner, Klaus-Robert Müller, F. Stefan Tautz

Here, we present a strategy to work around both obstacles, and demonstrate autonomous robotic nanofabrication by manipulating single molecules.

reinforcement-learning Reinforcement Learning (RL)

Measuring Inter-group Agreement on zSlice Based General Type-2 Fuzzy Sets

no code implementations9 Jul 2019 Javier Navarro, Christian Wagner

While previously, the Agreement Ratio was proposed to measure the strength of agreement in fuzzy set based models of interval data, said measure has only been applicable to type-1 fuzzy sets.

Vocal Bursts Type Prediction

Measuring Player's Behaviour Change over Time in Public Goods Game

no code implementations9 Sep 2016 Polla Fattah, Uwe Aickelin, Christian Wagner

External clustering indices were originally used to measure the difference between suggested clusters in terms of clustering algorithms and ground truth labels for items provided by experts.

Clustering

Modelling Cyber-Security Experts' Decision Making Processes using Aggregation Operators

no code implementations30 Aug 2016 Simon Miller, Christian Wagner, Uwe Aickelin, Jonathan M. Garibaldi

An important role carried out by cyber-security experts is the assessment of proposed computer systems, during their design stage.

Decision Making Evolutionary Algorithms

Exploring Differences in Interpretation of Words Essential in Medical Expert-Patient Communication

no code implementations21 Jul 2016 Javier Navarro, Christian Wagner, Uwe Aickelin, Lynsey Green, Robert Ashford

As the results of these questionnaires are often used to assess patient progress and to determine future treatment options, it is important to establish that the words used are interpreted in the same way by both patients and medical professionals.

Applying Interval Type-2 Fuzzy Rule Based Classifiers Through a Cluster-Based Class Representation

no code implementations21 Jul 2016 Javier Navarro, Christian Wagner, Uwe Aickelin

Fuzzy Rule-Based Classification Systems (FRBCSs) have the potential to provide so-called interpretable classifiers, i. e. classifiers which can be introspective, understood, validated and augmented by human experts by relying on fuzzy-set based rules.

Classification Clustering +1

Optimising Rule-Based Classification in Temporal Data

no code implementations20 Jul 2016 Polla Fattah, Uwe Aickelin, Christian Wagner

Based on these initial classifications, the optimisation process tries to find an improved classifier which produces the best possible compact classes of objects (players) for every time point in the temporal data.

Classification General Classification

Precision measurement of the local bias of dark matter halos

no code implementations3 Nov 2015 Titouan Lazeyras, Christian Wagner, Tobias Baldauf, Fabian Schmidt

We present accurate measurements of the linear, quadratic, and cubic local bias of dark matter halos, using curved "separate universe" N-body simulations which effectively incorporate an infinite-wavelength overdensity.

Cosmology and Nongalactic Astrophysics

Separate Universe Simulations

no code implementations22 Sep 2014 Christian Wagner, Fabian Schmidt, Chi-Ting Chiang, Eiichiro Komatsu

The large-scale statistics of observables such as the galaxy density are chiefly determined by their dependence on the local coarse-grained matter density.

Cosmology and Nongalactic Astrophysics

Analysing Fuzzy Sets Through Combining Measures of Similarity and Distance

no code implementations3 Sep 2014 Josie McCulloch, Christian Wagner, Uwe Aickelin

This is especially true where a large number of fuzzy sets are being compared as part of a reasoning system.

A Fuzzy Directional Distance Measure

no code implementations3 Sep 2014 Josie C. McCullochy, Chris J. Hinde, Christian Wagner, Uwe Aickelin

The measure of distance between two fuzzy sets is a fundamental tool within fuzzy set theory, however, distance measures currently within the literature use a crisp value to represent the distance between fuzzy sets.

Multiobjective Optimization and Comparisonof Nonsingleton Type-1 and Singleton IntervalType-2 Fuzzy Logic Systems

no code implementations journal 2013 Ana Bel ́en Cara, Christian Wagner

We will also present a multiobjective evolution-ary algorithm (MOEA) for the optimization of singleton type-1, nonsingleton type-1, and singleton interval type-2 fuzzy systems forfunction approximation problems.

Multiobjective Optimization Vocal Bursts Type Prediction

Measuring the Directional Distance Between Fuzzy Sets

no code implementations23 Aug 2013 Josie McCulloch, Christian Wagner, Uwe Aickelin

The measure of distance between two fuzzy sets is a fundamental tool within fuzzy set theory.

Creating Personalised Energy Plans. From Groups to Individuals using Fuzzy C Means Clustering

no code implementations4 Jul 2013 Ian Dent, Christian Wagner, Uwe Aickelin, Tom Rodden

Changes in the UK electricity market mean that domestic users will be required to modify their usage behaviour in order that supplies can be maintained.

Clustering Marketing

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