Publicaties
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Dynamical fluctuations for semi-Markov processes KU Leuven
We develop an Onsager-Machlup-type theory for nonequilibrium semi-Markov processes. Our main result is an exact large-time asymptotics for the joint probability of the occupation times and the currents in the system, establishing some generic large deviation structures. We discuss in detail how the nonequilibrium driving and the non-exponential waiting time distribution influence the occupation-current statistics. The violation of the Markov ...
Multiscale kernel smoothing using a lifting scheme KU Leuven
This paper discusses the idea of a lifting scheme for multiscale implementation of kernel estimation procedures used in statistical estimation. The resulting decomposition is related to the Burt-Adelson pyramid, but the design of the filters is well adapted to nonequispaced samples. The proposed decomposition has an oversampling rate of 2, where the oversampling can be seen as an alternative to primal lifting steps (update steps) as a tool for ...
Dynamical fluctuations for semi-Markov processes KU Leuven
We develop an Onsager-Machlup-type theory for nonequilibrium semi-Markov processes. Our main result is an exact large-time asymptotics for the joint probability of the occupation times and the currents in the system, establishing some generic large deviation structures. We discuss in detail how the nonequilibrium driving and the non-exponential waiting time distribution influence the occupation-current statistics. The violation of the Markov ...
Time-variant harmonic signal modeling by polynomial approximation and fully automated spectral analysis Vrije Universiteit Brussel
We present a novel approach to modelling time-variant harmonic content in audio signals. We show that both amplitude and fundamental frequency time variations can be compactly captured in a single time polynomial which modulates the fundamental harmonic component. A correct estimation of the fundamental frequency is assured through the fully automated spectral analysis method (ASA).The best-fit is easily obtained by linear least-squares, given ...
Power Processing Circuits for Vibration-Based Energy Harvesters (Vermogenbeheercircuits voor trillingsgebaseerde energy harvesters) KU Leuven
Sinds een aantal jaar groeit de interesse voor kleine draadloze elektron ische toestellen. De performantie en functionaliteit van micro- en nanosysteme n stijgt gestaag terwijl de grootte en de kost van CMOS elektronica vermin derd worden. Ontwikkelingen in het ontwerp van laagvermogenelektronica hebben de vermogenvereiste van kleine draadloze systemen verkleind tot een tien - tot honderdtal microwatt. Deze lage vermogensbehoefte opent ...
Comparative performance between invasive alien Eichhornia crassipes and native Ludwigia stolonifera under nutrient non-limiting conditions: Lake Naivasha, Kenya. Vrije Universiteit Brussel
Aquatic weed context
The spread of invasive alien species is now recognized as one of the greatest threats to the ecological and economic well-being of planet. Invasive plants often grow aggressively and form monocultures by outcompeting less vigorous native plants for light and space. Eichhornia crassipes (Mart.) Solms, is an indigenous monocotyledonous species of tropical South America that has become a widespread exotic pest of ...
The spread of invasive alien species is now recognized as one of the greatest threats to the ecological and economic well-being of planet. Invasive plants often grow aggressively and form monocultures by outcompeting less vigorous native plants for light and space. Eichhornia crassipes (Mart.) Solms, is an indigenous monocotyledonous species of tropical South America that has become a widespread exotic pest of ...
Excess of cardiovascular mortality among nodenegative breast cancer patients irradiated for innerquadrant tumors Vrije Universiteit Brussel
Background: Radiotherapy of the left breast is associated with higher cardiovascular mortality linked to cardiotoxic effect of irradiation. Radiotherapy of inner quadrants can be associated with greater heart irradiation, but no study has evaluated the effect of inner-quadrant irradiation on cardiovascular mortality. Patients and methods: We identified 1245 women, the majority with breast-conserving surgery, irradiated for primary ...
Not just another portal, not just another digital library: A portrait of Europeana as an application program interface KU Leuven
To the general public, Europeana is primarily perceived as a portal exposing a great amount of cultural heritage information. Even though this perception is not entirely misleading, the main goal of Europeana is rather to build an open services platform enabling users and cultural institutions to access and manage a large collection of surrogate objects representing digital and digitized content via an application program interface (API). The ...
A Fuzzy Selection Based Constraint Handling Method for Multi-objective Optimization of Analog Cells KU Leuven
In this paper, a constraint handling technique for multi-objective optimization of analog cells is presented. Selection-based constraint handling and fuzzy membership functions are combined to construct a new constraint handling method, multi-objective fuzzy selection (MOFS). This is integrated with multi-objective sizing, which has the following two advantages: (1) enhances the effectiveness and efficiency of handling specifications distinctly; ...