Results 11 to 20 of about 757,721 (338)

The hybrid power mean of the generalized Gauss sums

open access: yesAdvances in Difference Equations, 2017
The main purpose of this paper is using the analytic method and the orthogonal properties of the character sums to study the computational problem of one kind hybrid power mean of the generalized Gauss sums mod p $\operatorname{mod}\ p$ , an odd prime ...
Li Chen, Wenpeng Zhang
doaj   +1 more source

Probing Reactivity with External Forces: The Case of Nitroacetamides in Water

open access: yesMolecules, 2023
Many computational methods have been applied to interpret and predict changes in reactivity by slight modifications of a given molecular scaffold. We describe a novel and simple method based on approximate density-functional theory of valence electrons ...
Giovanni La Penna, Fabrizio Machetti
doaj   +1 more source

Ultrafast Electrically Pumped VECSELs

open access: yesIEEE Photonics Journal, 2013
We present an improved design for electrically pumped vertical external-cavity surface-emitting lasers (EP-VECSELs) optimized for passive modelocking with a semiconductor saturable absorber mirror (SESAM).
W. P. Pallmann   +7 more
doaj   +1 more source

On the High-Power Mean of the Generalized Gauss Sums and Kloosterman Sums

open access: yesMathematics, 2019
The main aim of this paper is to use the properties of the trigonometric sums and character sums, and the number of the solutions of several symmetry congruence equations to research the computational problem of a certain sixth power mean of the ...
Xinyu Liu, Wenpeng Zhang
doaj   +1 more source

UTD-Type Solution of Physical Optics Approximation for Reconfigurable Intelligent Surface Modeled by a Continuous Planar Surface

open access: yesIEEE Open Journal of Antennas and Propagation, 2023
An accurate and fast prediction technique is necessary for the radiation pattern of the reconfigurable intelligent surface (RIS) to quantitatively and efficiently evaluate the performance of RIS.
Xin Du, Chechia Kang, Jun-Ichi Takada
doaj   +1 more source

Counting curves via lattice paths in polygons [PDF]

open access: yes, 2003
This note presents a formula for the enumerative invariants of arbitrary genus in toric surfaces. The formula computes the number of curves of a given genus through a collection of generic points in the surface.
Mikhalkin, Grigory
core   +7 more sources

Effective computations of the Atiyah-Bott formula [PDF]

open access: yesJournal of Symbolic Computation, 2022
We present an implementation of the Atiyah-Bott residue formula for $\overline{M}_{0,m}(\mathbb{P}^{n},d)$. We use this implementation to compute a large number of Gromov-Witten invariants of genus $0$, including intersection numbers of rational curves on general complete intersections. We also compute some numbers of rational contact curves satisfying
Giosuè Muratore, Csaba Schneider
openaire   +3 more sources

Discrete Information Dynamics with Confidence via the Computational Mechanics Bootstrap: Confidence Sets and Significance Tests for Information-Dynamic Measures

open access: yesEntropy, 2020
Information dynamics and computational mechanics provide a suite of measures for assessing the information- and computation-theoretic properties of complex systems in the absence of mechanistic models.
David Darmon
doaj   +1 more source

Computational simulation of an aerodynamic profile of a vehicle SAE formula type using OpenFOAM

open access: yesSemina: Ciências Exatas e Tecnológicas, 2022
Improving vehicle design is essential for esthetic reasons and ensuring better efficiency and lower fuel consumption. The present study intends to provide a computational approach to an actual physical engineering problem: the aerodynamics of ...
Lúcio Vargas de Albuquerque Nunes   +2 more
doaj   +1 more source

A new closed-form formula for calculating a weakly singular static potential integral with linear current source distribution on a triangle [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2023
The article presents a closed-form formula for solving a weakly singular surface integral with a linear current source distribution associated with the SIE-MoM formulation used for solving electromagnetic (EM) problems.
Anna Grytsko, Piotr Słobodzian
doaj   +1 more source

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