45 Result(s)

Chapter and Conference Paper

Duals of input/output maps

J. Rissanen, B. Wyman in Category Theory Applied to Computation and Control (1975)

Chapter and Conference Paper

Estimation of Optimum Structures and Parameters for Linear Systems

The problem of determining a linear state space model for a stochastic process from measured output data contains, as an important part, the problem of choosing of a suitable structure for the model. A criteri...

J. Rissanen, L. Ljung in Mathematical Systems Theory (1976)

Chapter and Conference Paper

Theory of relations for databases — a tutorial survey

This is an account of a theory of relations that has advanced from Codd's relational model of data for databases. The theory developed so far by a number of authors deals with syntactic characterizations of th...

J. Rissanen in Mathematical Foundations of Computer Science 1978 (1978)

Chapter and Conference Paper

Shortest data description and consistency of order estimates in ARMA-processes

J. Rissanen in International Symposium on Systems Optimization and Analysis (1979)

Article

Estimation of structure by minimum description length

A theorem is proved which demonstrates that an earlier derived minimum description length estimation criterion is capable of distinguishing between structures in linear models for vector processes. A fairly si...

J. Rissanen in Circuits, Systems and Signal Processing (1982)

Chapter

Estimation of Structure by Minimum Description Length

A theorem is proved which demonstrates that an earlier derived minimum description length estimation criterion is capable of distinguishing between structures in linear models for vector processes. A fairly si...

J. Rissanen in Rational Approximation in Systems Engineering (1983)

Chapter and Conference Paper

Coding and Complexity

Inspired by the algorithmic notion of complexity, Solomonoff (1964), Kolmogorov (1965), Chaitin (1966), as well as Akaike’s work, Akaike (1977), I some ten years ago proposed the shortest code length for the o...

J. Rissanen in Sequences (1990)

Chapter and Conference Paper

Stochastic complexity in learning

This is an expository paper on the latest results in the theory of stochastic complexity and the associated MDL principle with special interest in modeling problems arising in machine learning. As an illustration...

J. Rissanen in Computational Learning Theory (1995)

Chapter

Learning by MDL

Machine learning has been formalized as the problem of estimating a conditional distribution as the ‘concept’ to be learned. The learning algorithm is based upon the MDL (Minimum Description Length) principle....

J. Rissanen, Bin Yu in Learning and Geometry: Computational Approaches (1996)

Article

Experimental studies at JYFLTRAP

JYFLTRAP is a Penning trap system at the accelerator laboratory in Jyväskylä, Finland that enables high-precision experiments with stored, exotic species that are produced at the IGISOL facility. On one hand, ...

A. Jokinen, C. Weber, T. Eronen, V. -V. Elomaa, U. Hager… in Hyperfine Interactions (2006)

Article

Decay study of neutron-rich zirconium isotopes employing a Penning trap as a spectroscopy tool

A new technique to produce isobarically pure ion beams for decay spectroscopy by using a gas-filled Penning trap was commissioned at the ion guide isotope separator on-line facility, IGISOL. β-decays of neutro...

S. Rinta-Antila, T. Eronen, V. -V. Elomaa, U. Hager… in The European Physical Journal A (2007)

Chapter and Conference Paper

Experimental studies at JYFLTRAP

JYFLTRAP is a Penning trap system at the accelerator laboratory in Jyväskylä, Finland that enables high-precision experiments with stored, exotic species that are produced at the IGISOL facility. On one hand, ...

A. Jokinen, C. Weber, T. Eronen, V.-V. Elomaa, U. Hager, J. Hakala, S. Rahaman… in TCP 2006 (2007)

Article

Precise atomic masses of neutron-rich Br and Rb nuclei close to the r-process path

The Penning trap mass spectrometer JYFLTRAP, coupled to the Ion-Guide Isotope Separator On-Line (IGISOL) facility at Jyväskylä, was employed to measure the atomic masses of neutron-rich ^85-92Br and ^94-97Rb isotop...

S. Rahaman, U. Hager, V. -V. Elomaa, T. Eronen… in The European Physical Journal A (2007)

Article

Conversion electron spectroscopy of isobarically purified trapped radioactive ions

The feasibility of the JYFLTRAP for in-trap spectroscopy has been studied. Several internally converted transitions have been measured for isomers of fission products with good accuracy. High-resolution spectr...

J. Rissanen, V. -V. Elomaa, T. Eronen, J. Hakala… in The European Physical Journal A (2007)

Article

Precision mass measurements of radioactive nuclei at JYFLTRAP

The Penning trap mass spectrometer JYFLTRAP was used to measure the atomic masses of radioactive nuclei with an uncertainty better than 10 keV. The atomic masses of the neutron-deficient nuclei around the ...

S. Rahaman, V.-V. Elomaa, T. Eronen… in The European Physical Journal Special Topi… (2007)

Article

Precise half-life measurement of the ²⁶Si ground state

The β-decay half-life of ²⁶Si was measured with a relative precision of 1.4·10⁻³. The measurement yields a value of 2.2283(27) s which is in good agreement with previous measurements but has a precision that is b...

I. Matea, J. Souin, J. Äystö, B. Blank, P. Delahaye… in The European Physical Journal A (2008)