#### Filter Results:

- Full text PDF available (10)

#### Publication Year

2006

2018

- This year (2)
- Last 5 years (7)
- Last 10 years (14)

#### Publication Type

#### Co-author

#### Journals and Conferences

Learn More

- Yoshiyuki Kabashima, Florent Krzakala, Marc MÃ©zard, Ayaka Sakata, Lenka ZdeborovÃ¡
- IEEE Transactions on Information Theory
- 2016

We analyze the matrix factorization problem. Given a noisy measurement of a product of two matrices, the problem is to estimate back the original matrices. It arises in many applications, such asâ€¦ (More)

- Ayaka Sakata, Yoshiyuki Kabashima
- 2013 IEEE International Symposium on Informationâ€¦
- 2013

We consider a learning problem of identifying a dictionary matrix D ∈ R<sup>M×N</sup> from a sample set of M dimensional vectors Y ∈ R<sup>M×P</sup> = N<sup>-1/2</sup>DXâ€¦ (More)

- Ayaka Sakata, Yoshiyuki Kabashima
- ArXiv
- 2012

Abstract â€“ Finding a basis matrix (dictionary) by which objective signals are represented sparsely is of major relevance in various scientific and technological fields. We consider a problem to learnâ€¦ (More)

We introduce an infectious default and recoverymodel forN obligors. Obligors are assumed to be exchangeable and their states are described by N Bernoulli random variables Si(i = 1, Â· Â· Â· , N). Theyâ€¦ (More)

We introduce an infectious default and recovery model for N obligors. The obligors are assumed to be exchangeable and their states are described by N Bernoulli-type random variables Si(i = 1, Â· Â· Â· ,â€¦ (More)

- Ayaka Sakata
- ArXiv
- 2018

We propose an estimator of prediction error using an approximate message passing (AMP) algorithm that can be applied to a broad range of sparse penalties. Following Steinâ€™s lemma, the estimator ofâ€¦ (More)

- Ayaka Sakata, Koji Hukushima
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2011

A partially annealed mean-field spin-glass model with a locally embedded pattern is studied. The model consists of two dynamical variables, spins and interactions, that are in contact with thermalâ€¦ (More)

- Ayaka Sakata, Koji Hukushima, Kunihiko Kaneko
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2009

In biological systems, expression dynamics that can provide fitted phenotype patterns with respect to a specific function have evolved through mutations. This has been observed in the evolution ofâ€¦ (More)

- Ayaka Sakata, Koji Hukushima, Kunihiko Kaneko
- Physical review letters
- 2009

Using a statistical-mechanical model of spins, the evolution of phenotype dynamics is studied. Configurations of spins and their interaction J represent the phenotype and genotype, respectively. Theâ€¦ (More)

- Ayaka Sakata, Yingying Xu
- ArXiv
- 2017

We analyse a linear regression problem with nonconvex regularization called smoothly clipped absolute deviation (SCAD) under an overcomplete Gaussian basis for Gaussian random data. We propose anâ€¦ (More)