Results 71 to 80 of about 4,692,865 (188)

MissForest—non-parametric missing value imputation for mixed-type data [PDF]

open access: yes, 2017
Motivation: Modern data acquisition based on high-throughput technology is often facing the problem of missing data. Algorithms commonly used in the analysis of such large-scale data often depend on a complete set.
Bühlmann, Peter, Stekhoven, Daniel J.
core  

Double exchange mechanisms for Mn doped III-V ferromagnetic semiconductors

open access: yes, 2003
A microscopic model of indirect exchange interaction between transition metal impurities in dilute magnetic semiconductors (DMS) is proposed. The hybridization of the impurity d-electrons with the heavy hole band states is largely responsible for the ...
Fleurov, V.   +4 more
core   +1 more source

Equilibrium properties of the mixed state in superconducting niobium in a transverse magnetic field: Experiment and theoretical model

open access: yes, 2018
Equilibrium magnetic properties of the mixed state in type-II superconductors were measured with high purity bulk and film niobium samples in parallel and perpendicular magnetic fields using dc magnetometry and scanning Hall-probe microscopy. Equilibrium
Bending, S.   +7 more
core   +1 more source

Pattern Classification for Mixed Feature-Type Symbolic Data Using Supervised Hierarchical Conceptual Clustering

open access: yesStats
This paper describes a region-oriented method of pattern classification based on the Cartesian system model (CSM), a mathematical model that allows manipulating mixed feature-type symbolic data. We use the supervised hierarchical conceptual clustering to
Manabu Ichino, Hiroyuki Yaguchi
doaj   +1 more source

Mixed-Mode: Past, Present, and Future

open access: yesSurvey Research Methods, 2018
Mixed-mode surveys have been around since the late 1980s. In the past thirty years, major changes in technology and society influenced and changed data collection and survey methodology. However, in those years, mixed-mode strategies remained part of the
Edith D. DeLeeuw
doaj   +1 more source

Issues with rounding in the GCC implementation of the ISO 18037:2008 standard fixed-point arithmetic

open access: yes, 2020
We describe various issues caused by the lack of round-to-nearest mode in the \textit{gcc} compiler implementation of the fixed-point arithmetic data types and operations.
Mikaitis, Mantas
core   +1 more source

Statistical jump model for mixed-type data with missing data imputation

open access: yesAdvances in Data Analysis and Classification
Abstract In this paper, we address the challenge of clustering mixed-type data with temporal evolution by introducing the statistical jump model for mixed-type data. This novel framework incorporates regime persistence, enhancing interpretability and reducing the frequency of state switches, and efficiently handles missing data.
Cortese F., Pievatolo A.
openaire   +2 more sources

Optimal error estimates of a mixed finite element method for\ud parabolic integro-differential equations with non smooth initial data [PDF]

open access: yes, 2010
In this article, a new mixed method is proposed and analyzed for parabolic integro-differential equations (PIDE) with nonsmooth initial data. Compared to mixed methods for PIDE, the present method does not bank on a reformulation using a resolvent ...
Goswami, D., Pani, A. K., Yadav, S
core  

Type-I superconductivity in noncentrosymmetric superconductor AuBe

open access: yes, 2019
The noncentrosymmetric superconductor AuBe have been investigated using the magnetization, resistivity, specific heat, and muon-spin relaxation/rotation measurements.
Hillier, A. D., Singh, D., Singh, R. P.
core   +1 more source

AUFS-Samba: Adaptive Unsupervised Feature Selection for Mixed Data Type Using Simulated Annealing and Multi-Armed Bandit

open access: yesIEEE Access
Unsupervised feature selection (UFS) for mixed-type data is challenging because there are no labels, and traditional methods cannot handle heterogeneous feature spaces effectively.
Hasta Pratama   +2 more
doaj   +1 more source

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