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norskInstitutt for datateknologi og beregningsorienterte ingeniørfag: Nye registreringer
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Applications of Additive Manufacturing for Norwegian Oil and Gas Industries
(Master thesis; Mastergradsoppgave, 2022-05-16)The additive manufacturing or 3D printing (3DP) technologies have undergone exponential expansion, particularly in the previous couple of decades. Additive manufacturing technologies have paved the way for easy component manufacturing in large-scale and high-performance businesses. The introduction of desktop 3D printers has established 3DP as a reliable technique for generating prototypes and direct ... -
On operator estimates in homogenization of nonlocal operators of convolution type
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-11) -
Homogenization of Ferromagnetic Energies on Poisson Random Sets in the Plane
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-06)We prove that by scaling nearest-neighbour ferromagnetic energies de ned on Poisson random sets in the plane we obtain an isotropic perimeter energy with a surface tension characterised by an asymptotic formula. The result relies on proving that cells with `very long' or `very short' edges of the corresponding Voronoi tessellation can be neglected. In this way we may apply Geometry Measure ... -
Vilenkin–Lebesgue Points and Almost Everywhere Convergence for Some Classical Summability Methods
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-17)The concept of Vilenkin–Lebesgue points was introduced in [12], where the almost everywhere convergence of Fejer means of Vilenkin–Fourier series was proved. In this paper, we present a different (and simpler) approach to prove a similar result, which can be used to prove that the corresponding result holds also in a more general context, namely for regular Norlund and T-means. -
Large deviations for Markov jump processes in periodic and locally periodic environments
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12)The paper deals with a family of jump Markov process defined in a medium with a periodic or locally periodic microstructure. We assume that the generator of the process is a zero order convolution type operator with rapidly oscillating locally periodic coefficient and, under natural ellipticity and localization conditions, show that the family satisfies the large deviation principle in the path space ... -
Discretization and Representation of a Complex Environment for On-Policy Reinforcement Learning for Obstacle Avoidance for Simulated Autonomous Mobile Agents
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-12)In recent years, the demand for digitalization, automation, and smart systems in the airline industry has accelerated. Furthermore, due to the ongoing global pandemic as of 2022, airlines are faced with the challenge of offering flexibility in both cargo and passenger capacity. Studies show that the use of smart products and autonomous agents are expected to play a key part in the digital transformation ... -
Toward Interactive Music Generation: A Position Paper
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-30)Music generation using deep learning has received considerable attention in recent years. Researchers have developed various generative models capable of imitating musical conventions, comprehending the musical corpora, and generating new samples based on the learning outcome. Although the samples generated by these models are persuasive, they often lack musical structure and creativity. For instance, ... -
Blending techniques in Curve and Surface constructions
(Book; Bok, 2022) -
Blendingsteknikker i kurve- og flatekonstruksjoner
(Book; Bok, 2022) -
A note on contributions concerning nonseparable spaces with respect to signal processing within Bayesian frameworks
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-17)In this paper, we discuss the study of some signal processing problems within Bayesian frameworks and semigroups theory, in the case where the Banach space under consideration may be nonseparable. For applications, the suggested approach may be of interest in situations where approximation in the norm of the space is not possible. We describe the idea for the case of the abstract Cauchy problem ... -
Refinements of some classical inequalities via superquadraticity
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-21)Some new refined versions of the Jensen, Minkowski, and Hardy inequalities are stated and proved. In particular, these results both generalize and unify several results of this type. Some results are also new for the classical situation. -
A Feedforward Neural Network for Modeling of Average Pressure Frequency Response
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-22)The Helmholtz equation has been used for modeling the sound pressure field under a harmonic load. Computing harmonic sound pressure fields by means of solving Helmholtz equation can quickly become unfeasible if one wants to study many different geometries for ranges of frequencies. We propose a machine learning approach, namely a feedforward dense neural network, for computing the average sound ... -
Synaptus: A Matlab/Octave toolbox for synthetic aperture ultrasound imaging.
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-08)Underlying patterns and factors behind suicides of patients in treatment are still unclear and there is a pressing need for more studies to address this knowledge gap. We analysed 278 cases of suicide reported to The Norwegian System of Patient Injury Compensation, drawing on anonymised data, i.e., age group, gender, diagnostic category, type of treatment provided, inpatient vs. outpatient status, ... -
Continuous refinements of some Jensen-type inequalities via strong convexity with applications
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-23)In this paper we prove new continuous refinements of some Jensen type inequalities in both direct and reversed forms. As applications we also derive some continuous refinements of Hermite–Hadamard, Hölder, and Popoviciu type inequalities. As particular cases we point out the corresponding results for sums and integrals showing that our results contain both several well-known but also some new ... -
Weighted Hardy Operators in Complementary Morrey Spaces
(Journal article; Tidsskriftartikkel; Peer reviewed, 2012-11-11)We study the weighted -boundedness of the multidimensional weighted Hardy-type operators and with radial type weight , in the generalized complementary Morrey spaces defined by an almost increasing function . We prove a theorem which provides conditions, in terms of some integral inequalities imposed on and , for such a boundedness. These conditions are sufficient in the general case, but we ... -
Some new iterated Hardy-type inequalities: the case theta=1
(Journal article; Tidsskriftartikkel; Peer reviewed, 2013-11-08)In this paper we characterize the validity of the Hardy-type inequality ∥ ∥ ∫ <sub>s</sub>∞) h(z)dz ∥ p,u,(0,t) ∥ q,w,(=,∞≤ c∥h∥ 1,v(0,∞) where 0 < p < ∞,0< q ≤ +∞, u, w and v are weight functions on (0,∞). It is pointed out that this characterization can be used to obtain new characterizations for the boundedness between weighted Lebesgue spaces ... -
Homogenization of a singular random one-dimensional PDE with time-varying coefficients
(Journal article; Tidsskriftartikkel; Peer reviewed, 2012-05-04)In this paper we study the homogenization of a nonautonomous parabolic equation with a large random rapidly oscillating potential in the case of one-dimensional spatial variable. We show that if the potential is a statistically homogeneous rapidly oscillating function of both temporal and spatial variables, then, under proper mixing assumptions, the limit equation is deterministic, and convergence ... -
Isogeometric analysis using a tensor product blending spline construction
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-01)In this paper, we introduce a blending spline type construction into the isogeometric analysis. We consider a general algorithm for solving a number of boundary value problems, including heat equation, wave equation, linear elasticity, etc. The usage of blending spline construction in the isogeometric context mixes standard finite element and NURBS-based approaches while accumulating the benefits ... -
Experiments on turbulence from colliding ice floes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-16)Increased knowledge about energy dissipation processes around colliding ice floes is important for improved understanding of atmosphere-ice-ocean energy transfer, wave propagation through sea ice, and the polar climates. The aim of this study is to obtain such information by investigating colliding ice floe dynamics in a large-scale experiment and directly measuring and quantifying the turbulent ... -
Analysis of local climate effects for Martineåsen development project in Larvik
(Master thesis; Mastergradsoppgave, 2017-08-15)The goal of this thesis is to perform analysis of local climate effects for Martineåsen development project in Larvik. The Norwegian regulatory acts place a strict requirements on outdoor areas comfort criteria and thus for the purpose of said development project, strict adherence to these acts is necessary. The outdoor comfort in cold climate is mostly governed by wind, and thus study of local ...
