Claudia Krull

Virtual Stochastic Sensors: Formal Background and Example Applications

Reconstructing the Behavior of Partially Observable Discrete and Hybrid Stochastic Systems


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ISBN:

978-3-8440-8242-5

Series:

Informatik

Keywords:

discrete stochastic model; doubly stochastic process; behavior reconstruction; stochastic Petri-net; stochastic system; non-Markovian model

Type of publication:

Professorial dissertation

Language:

English

Pages:

202 pages

Figures:

47 figures

Weight:

299 g

Format:

21 x 14,8 cm

Bindung:

Paperback

Price:

48,80 € / 61,10 SFr

Published:

October 2021

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DOI:

10.2370/9783844082425 (Online document)

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Abstract:

Many real-world problems can be described by using discrete or hybrid stochastic systems. Modeling and simulation of such systems is possible, if they are directly and completely observable. Unfortunately, complete observability is often not possible or not feasible, due to economic or safety considerations, or simply because the system has not been observed during the time period of interest. Instead, often one may only see output or effects of the system of interest, making the systems partially observable. Inferring on the cause of such observations by reconstructing unobserved system behavior can be considered an inverse problem in modeling and simulation, which to our knowledge have not been investigated thus far.
This book introduces the concept of Virtual Stochastic Sensors (VSS) for the specification and solution of inverse problems for a broad class of non-Markovian partially observable stochastic systems. VSS enable the reconstruction of specific system behavior or quantities of interest based on observable system output or effects. In the first part, the book presents modeling paradigms and analysis methods for inverse problems of specific types of partially observable discrete and hybrid stochastic systems. In the second part, it shows the feasibility of the VSS concept by solving inverse problems in three exemplary application areas, namely optimization of jobshop productions, non-intrusive appliance load monitoring, and human computer interaction.