Search

Your search keyword '"Cerdán J"' showing total 125 results
Start Over Author "Cerdán J"
125 results on '"Cerdán J"'

1. An inverse LU preconditioner based on the Sherman–Morrison formula

Author

Bru R., Cerdán J., Marín J., and Mas J.

Subjects
nonsymmetric linear systems, iterative methods, aproximate inverse lu preconditioning, sherman-morrison formula, primary 65f08, 65f10, secondary 65f50, Mathematics, QA1-939
Abstract

An approximate inverse LU preconditioner is constructed based on the Sherman–Morrison formula. Applying recursively that inversion formula a multiplicative decomposition of the inverse of a matrix is obtained. This recursion in compact form is the base to build the proposed preconditioner that we call V–AISM. For nonsingular M-matrices and H-matrices of the invertible class the stability of the preconditioner is proved. Numerical results show that V–AISM is robust and competitive compared with other preconditioners.

Published
2024
Full Text
View/download PDF

2. ITI-IQA: a Toolbox for Heterogeneous Univariate and Multivariate Missing Data Imputation Quality Assessment

Author

Pons-Suñer, Pedro, Arnal, Laura, Navarro-Cerdán, J. Ramón, and Signol, François

Subjects
Computer Science - Machine Learning
Abstract

Missing values are a major challenge in most data science projects working on real data. To avoid losing valuable information, imputation methods are used to fill in missing values with estimates, allowing the preservation of samples or variables that would otherwise be discarded. However, if the process is not well controlled, imputation can generate spurious values that introduce uncertainty and bias into the learning process. The abundance of univariate and multivariate imputation techniques, along with the complex trade-off between data reliability and preservation, makes it difficult to determine the best course of action to tackle missing values. In this work, we present ITI-IQA (Imputation Quality Assessment), a set of utilities designed to assess the reliability of various imputation methods, select the best imputer for any feature or group of features, and filter out features that do not meet quality criteria. Statistical tests are conducted to evaluate the suitability of every tested imputer, ensuring that no new biases are introduced during the imputation phase. The result is a trainable pipeline of filters and imputation methods that streamlines the process of dealing with missing data, supporting different data types: continuous, discrete, binary, and categorical. The toolbox also includes a suite of diagnosing methods and graphical tools to check measurements and results during and after handling missing data., Comment: 28 pages, 8 figures

Published
2024

3. Standardization of the definition of the types of oncological colectomy. Delphi method for consensus of experts of the Spanish Association of Surgeons

Author

Die-Trill, J., Pascual Damieta, P., Peña Ros, E., Jimenez Rodríguez, R., Hidalgo Pujol, M., Jiménez Gómez, L.M., Arencibia Pérez, B., Vigorita, V., Colombari, R., Pérez Pérez, T., García Martínez, M.T., Bauxali, J., Cerdán, J., García-Pérez, J.C., Martin-Perez, B., Uribe Quintana, N., Farrés Coll, R., González-Argenté, F.J., Bernal Sprekelsen, J.C., Fraccalvieri, D., Garcia Granero, E., Gómez Ruiz, M., García Cabrera, A.M., Palma, P., Pla-Martí, V., Mera Velasco, S., Blanco-Antona, F., Parajó, A., Salgado, G., Vázquez Monchul, J.M., Ocaña Jiménez, J., Jiménez-Escobar, F., Martí-Gallostra, M., Díaz Pavón, J.M., Salvador-Morales, C., Biondo, S., Espí, A., Solana-Bueno, A., Marín, G., Pastor Idoate, C., Valle-Hernández, E.D., Tejedor, P., Alós Company, R., Elosua, T., Rueda Orgaz, J.A., García Septiem, J., Ballester Ibánez, C., Frasson, M., Hernandis Villalba, J.V., Pascual Miguelañez, I., García-González, J.M., Jimenez-Toscano, M., Benavides Buleje, J.A., Enríquez-Navascués, J.M., Reyes Díaz, M.L., Millan, M., Sánchez-Guillén, L., Roig Vila, J.V., Parra-Baños, P.A., Fernánde, C., Cantero-Cid, R., Truán Alonso, N., Nogués-Ramia, E.M., Serra Pla, S., Climent-Agustín, M., Marinello, F., Moro-Valdezate, D., Frago, R., Espin, E., Pera-Román, M., Álvarez Laso, C.J., Placer-Galan, C., Labalde Martínez, M., García-Armengol, J.J., Codina, A., Capitan-Morales, L.C., Garcia-Aguilar, J., Fernández-Cebrián, J.M., Fernández-Hevia, M., García-Flórez, L.J., Pellino, G., Martínez-Pérez, C., Fernández-López, F., Garcia-Granero, Alvaro, Martín-Martín, Gonzalo P., Dujovne-Lindenbaum, Paula, Alvarez Laso, Carlos J., Cerdán-Santacruz, Carlos, Flor-Lorente, Blas, and Biondo, Sebastiano

Published
2024
Full Text
View/download PDF

4. Estandarización de la definición de los tipos de colectomía oncológica. Método Delphi para consenso de expertos de la Asociación Española de Cirujanos

Author

Die-Trill, J., Pascual Damieta, P., Peña Ros, E., Jimenez Rodríguez, R., Hidalgo Pujol, M., Jiménez Gómez, L.M., Arencibia Pérez, B., Vigorita, V., Colombari, R., Pérez Pérez, T., García Martínez, M.T., Bauxali, J., Cerdán, J., García-Pérez, J.C., Martin-Perez, B., Uribe Quintana, N., Farrés Coll, R., González-Argenté, F.J., Bernal Sprekelsen, J.C., Fraccalvieri, D., Garcia Granero, E., Gómez Ruiz, M., García Cabrera, A.M., Palma, P., Pla-Martí, V., Mera Velasco, S., Blanco-Antona, F., Parajó, A., Salgado, G., Vázquez Monchul, J.M., Ocaña Jiménez, J., Jiménez-Escobar, F., Martí-Gallostra, M., Díaz Pavón, J.M., Salvador-Morales, C., Biondo, S., Espí, A., Solana-Bueno, A., Marín, G., Pastor Idoate, C., Valle-Hernández, E.D., Tejedor, P., Alós Company, R., Elosua, T., Rueda Orgaz, J.A., García Septiem, J., Ballester Ibánez, C., Frasson, M., Hernandis Villalba, J.V., Pascual Miguelañez, I., García-González, J.M., Jimenez-Toscano, M., Benavides Buleje, J.A., Enríquez-Navascués, J.M., Reyes Díaz, M.L., Millan, M., Sánchez-Guillén, L., Roig Vila, J.V., Parra-Baños, P.A., Fernánde, C., Cantero-Cid, R., Truán Alonso, N., Nogués-Ramia, E.M., Serra Pla, S., Climent-Agustín, M., Marinello, F., Moro-Valdezate, D., Frago, R., Espin, E., Pera-Román, M., Álvarez Laso, C.J., Placer-Galan, C., Labalde Martínez, M., García-Armengol, J.J., Codina, A., Capitan-Morales, L.C., Garcia-Aguilar, J., Fernández-Cebrián, J.M., Fernández-Hevia, M., García-Flórez, L.J., Pellino, G., Martínez-Pérez, C., Fernández-López, F., Garcia-Granero, Alvaro, Martín-Martín, Gonzalo P, Dujovne-Lindenbaum, Paula, Alvarez Laso, Carlos J, Cerdán-Santacruz, Carlos, Flor-Lorente, Blas, and Biondo, Sebastiano

Published
2024
Full Text
View/download PDF

6. Estandarización de la definición de los tipos de colectomía oncológica. Método Delphi para consenso de expertos de la Asociación Española de Cirujanos

Author

Garcia-Granero, Alvaro, Martín-Martín, Gonzalo P, Dujovne-Lindenbaum, Paula, Alvarez Laso, Carlos J, Cerdán-Santacruz, Carlos, Flor-Lorente, Blas, Biondo, Sebastiano, Die-Trill, J., Pascual Damieta, P., Peña Ros, E., Jimenez Rodríguez, R., Hidalgo Pujol, M., Jiménez Gómez, L.M., Arencibia Pérez, B., Vigorita, V., Colombari, R., Pérez Pérez, T., García Martínez, M.T., Bauxali, J., Cerdán, J., García-Pérez, J.C., Martin-Perez, B., Uribe Quintana, N., Farrés Coll, R., González-Argenté, F.J., Bernal Sprekelsen, J.C., Fraccalvieri, D., Garcia Granero, E., Gómez Ruiz, M., García Cabrera, A.M., Palma, P., Pla-Martí, V., Mera Velasco, S., Blanco-Antona, F., Parajó, A., Salgado, G., Vázquez Monchul, J.M., Ocaña Jiménez, J., Jiménez-Escobar, F., Martí-Gallostra, M., Díaz Pavón, J.M., Salvador-Morales, C., Biondo, S., Espí, A., Solana-Bueno, A., Marín, G., Pastor Idoate, C., Valle-Hernández, E.D., Tejedor, P., Alós Company, R., Elosua, T., Rueda Orgaz, J.A., García Septiem, J., Ballester Ibánez, C., Frasson, M., Hernandis Villalba, J.V., Pascual Miguelañez, I., García-González, J.M., Jimenez-Toscano, M., Benavides Buleje, J.A., Enríquez-Navascués, J.M., Reyes Díaz, M.L., Millan, M., Sánchez-Guillén, L., Roig Vila, J.V., Parra-Baños, P.A., Fernánde, C., Cantero-Cid, R., Truán Alonso, N., Nogués-Ramia, E.M., Serra Pla, S., Climent-Agustín, M., Marinello, F., Moro-Valdezate, D., Frago, R., Espin, E., Pera-Román, M., Álvarez Laso, C.J., Placer-Galan, C., Labalde Martínez, M., García-Armengol, J.J., Codina, A., Capitan-Morales, L.C., Garcia-Aguilar, J., Fernández-Cebrián, J.M., Fernández-Hevia, M., García-Flórez, L.J., Pellino, G., Martínez-Pérez, C., and Fernández-López, F.

Abstract

[Display omitted]

Published
2024
Full Text
View/download PDF

13. Rejection Threshold Estimation for an Unknown Language Model in an OCR Task

Author

Arlandis, Joaquim, Perez-Cortes, Juan-Carlos, Navarro-Cerdan, J. Ramon, Llobet, Rafael, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Hancock, Edwin R., editor, Wilson, Richard C., editor, Windeatt, Terry, editor, Ulusoy, Ilkay, editor, and Escolano, Francisco, editor

Published
2010
Full Text
View/download PDF

14. Efficient OCR Post-Processing Combining Language, Hypothesis and Error Models

Author

Llobet, Rafael, Navarro-Cerdan, J. Ramon, Perez-Cortes, Juan-Carlos, Arlandis, Joaquim, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Hancock, Edwin R., editor, Wilson, Richard C., editor, Windeatt, Terry, editor, Ulusoy, Ilkay, editor, and Escolano, Francisco, editor

Published
2010
Full Text
View/download PDF

28. Vitamin D status and latent tuberculosis infection: conversion in nursing homes, Spain

Author

Arnedo-Pena, A., primary, Juan-Cerdán, J. V., additional, Romeu-Garcia, M., additional, Sorribes-Segura, S., additional, Tirado-Balaguer, M., additional, Gil-Fortuño, M., additional, Garcia-Ferrer, D., additional, Sabater-Vidal, S., additional, Iborra-Millet, J., additional, Vizcaino-Batllés, A., additional, Meseguer-Ferrer, N., additional, Vivas-Fornas, I., additional, Moreno-Muñoz, R., additional, and Bellido-Blasco, J. B., additional

Published
2020
Full Text
View/download PDF

49. Preconditioners based on the ISM factorization

Author

Bru Rafael, Cerdán Juana, Marín José, Mas José, and Tůma Miroslav

Subjects
preconditioned iterative methods, sparse matrices, incomplete decompositions, approximate inverses, sherman-morrison formula, Mathematics, QA1-939
Abstract

In this paper we survey our work on preconditioners based on the Inverse Sherman-Morrison factorization. The most important theoretical results are also summarized and some numerical conclusions are provided.

Published
2015
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results