Search results for "NUMBER"
showing 10 items of 3939 documents
Extracting multi-mode ERP features using fifth-order nonnegative tensor decomposition
2018
Background Preprocessed Event-related potential (ERP) data are usually organized in multi-way tensor, in which tensor decomposition serves as a powerful tool for data processing. Due to the limitation of computation burden for multi-way data and the low algorithm performance of stability and efficiency, multi-way ERP data are conventionally reorganized into low-order tensor or matrix before further analysis. However, the reorganization may hamper mode specification and spoil the interaction information among different modes. New method In this study, we applied a fifth-order tensor decomposition to a set of fifth-order ERP data collected by exerting proprioceptive stimulus on left and right…
Nome e numero: una parentela.
2014
In this paper we describe the relationships between two fundamental “cognitive gestures” of human beings: naming and counting. In particular, we try to define these relationships by examining the theoretical efforts of such authors as Euclide, Frege, Wittgenstein, Chomsky and Aristotle. The analysis is centered around justifying the mutual dependence between noun and number in human cognition.
Pedagoģiskie risinājumi 5-6 gadu bērnu ar īpašām redzes vajadzībām matemātiskās kompetences attīstīšanai
2016
Šī pētījuma mērķis ir izpētīt, kāds būtu vispiemērotākais pedagoģiskais risinājums (pieeja un procesi), lai bērni vecumā no 5-6 gadiem ar īpašām vizuālajām vajadzībām iegūtu matemātisko kompetenci. Pētījumā tiek aplūkoti skaitļa jēdziena teorētiskie pamati un analizēti skaitļu mācīšanās posmi un to nozīmīgums šajā vecumā. Matemātiskā domāšana attīstās, bērnam nodarbojoties ar matemātiku. Matemātiskajā jomā domāšanas stingrība ir būtiska pazīme jau no pirmās mācīšanās pieredzes. Empīriskajā daļā tika izpētīta skaitļa jēdziena izpratne un matemātiskās domāšanas apguves procesi, anketējot bijušos studentus, kuri atsauca atmiņā savu matemātikas apguves procesu un tā tālākizmantošanu izglītības …
Simplified stock markets and their quantum-like dynamics
2009
In this paper we continue our systematic analysis of the operatorial approach previously proposed in an economical context and we discuss a mixed toy model of a simplified stock market, i.e. a model in which the price of the shares is given as an input. We deduce the time evolution of the portfolio of the various traders of the market, as well as of other observable quantities. As in a previous paper, we solve the equations of motion by means of a fixed point like approximation.
Families of solutions to the KPI equation and the structure of their rational representations of order N
2018
We construct solutions to the Kadomtsev-Petviashvili equation (KPI) in terms of Fredholm determinants. We deduce solutions written as a quotient of wronskians of order 2N. These solutions called solutions of order N depend on 2N − 1 parameters. They can also be written as a quotient of two polynomials of degree 2N (N + 1) in x, y and t depending on 2N − 2 parameters. The maximum of the modulus of these solutions at order N is equal to 2(2N + 1) 2. We explicitly construct the expressions until the order 6 and we study the patterns of their modulus in the plane (x, y) and their evolution according to time and parameters.
Association of child maltreatment subtypes and long-term physical health in a German representative sample
2018
ABSTRACT Background: Child maltreatment is a major public problem, associated with enormous consequences on the individual and socioeconomic level. Studies show a clear impact of child maltreatment on long-term physical health. However, there is a lack of analyses comprising a wide variety of subtypes of maltreatment and addressing cumulative effects of different maltreatment subtypes experienced during childhood on physical health. Objective: The objective of this analysis was to assess the association of different subtypes and the intensity of child maltreatment with long-term physical health outcomes. Methods: In a cross-sectional observational approach, a representative sample of the Ge…
Assessing the profitability of investment projects using ordered fuzzy numbers
2019
Background: This article is motivated by the fact that most approaches to capital budgeting are deterministic. In reality, the capital budgeting problem is accompanied by the uncertainty and risk associated with dealing with imprecise data. Taking this uncertainty into account when performing analyses and calculations not only helps to better measure the profitability of investment projects, but also to expand the applicability of capital budgeting methods under real-life or uncertain conditions. The major contribution of this paper is the development of a novel approach to assessing the profitability of an investment project in the presence of uncertainty. Methods: We present a novel appro…
Szacowanie czasu realizacji projektu przy nieprecyzyjnych zmiennych
2017
The paper presents the essence and significance of the project time estimation under uncertainty and risk using ordered fuzzy numbers. The proposed approach is based on a fuzzy model of uncertainty using ordered fuzzy numbers as imprecise data – duration times. The presented extended critical path method is a new approach that has not been presented so far in the literature of the subject. The authors present the implementation of the approach on an example. The advantages of the proposed approach have been outlined in the paper. The proposed approach can find practical applications in decision-making problems under conditions of risk and uncertainty, supporting decision-makers in the plann…
An evolutionary Haar-Rado type theorem
2021
AbstractIn this paper, we study variational solutions to parabolic equations of the type $$\partial _t u - \mathrm {div}_x (D_\xi f(Du)) + D_ug(x,u) = 0$$ ∂ t u - div x ( D ξ f ( D u ) ) + D u g ( x , u ) = 0 , where u attains time-independent boundary values $$u_0$$ u 0 on the parabolic boundary and f, g fulfill convexity assumptions. We establish a Haar-Rado type theorem: If the boundary values $$u_0$$ u 0 admit a modulus of continuity $$\omega $$ ω and the estimate $$|u(x,t)-u_0(\gamma )| \le \omega (|x-\gamma |)$$ | u ( x , t ) - u 0 ( γ ) | ≤ ω ( | x - γ | ) holds, then u admits the same modulus of continuity in the spatial variable.
Group Identities on Units of Group Algebras
2000
Abstract Let U be the group of units of the group algebra FG of a group G over a field F . Suppose that either F is infinite or G has an element of infinite order. We characterize groups G so that U satisfies a group identity. Under the assumption that G modulo the torsion elements is nilpotent this gives a complete classification of such groups. For torsion groups this problem has already been settled in recent years.