Results 101 to 110 of about 277,674 (289)

Heterogeneous Fundamentalists in a Continuous Time Model with Delays

open access: yesDiscrete Dynamics in Nature and Society, 2014
We develop a continuous time model with heterogeneous fundamentalists, imitators, and discrete time delays. We show that nonlinear dynamic phenomena, such as coexistence of attractors and local and global bifurcations, occur due to the existence of a ...
Luca Gori, Luca Guerrini, Mauro Sodini
doaj   +1 more source

Laser Powder Bed Fusion of Copper–Tungsten Composites for Heat Sink Applications in High‐Power Electronics

open access: yesAdvanced Engineering Materials, EarlyView.
This article demonstrates the successful qualification of a copper–tungsten composite for laser powder bed fusion. The resulting components exhibited high density, high thermal conductivity, and reduced thermal expansion. Heat sinks with complex geometries were successfully manufactured, clearly showcasing the material's potential for additive ...
Simon Rauh   +6 more
wiley   +1 more source

A novel ML DOA estimation algorithm for array signal processing

open access: yesMATEC Web of Conferences, 2018
A novel algorithm for finding the optimal solution of nonlinear function in maximum likelihood DOA estimation is proposed to reduce the calculation in multi-dimensional nonlinear search of the estimation.
Shi Pengfei   +3 more
doaj   +1 more source

The term structure of interest rates with nonlinear adjustment: Evidence from a unit root test in the nonlinear STAR framework [PDF]

open access: yes
This paper investigates the term structure of interest rates in Japan using the unit root test in a nonlinear STAR framework. The results provide strong evidence against the unit root of the yield spread between long-term and short-term interest rates ...
Daiki Maki
core  

Multimodal Mechanical Testing of Additively Manufactured Ti6Al4V Lattice Structures: Compression, Bending, and Fatigue

open access: yesAdvanced Engineering Materials, EarlyView.
In this experimental study, the mechanical properties of additively manufactured Ti‐6Al‐4V lattice structures of different geometries are characterized using compression, four point bending and fatigue testing. While TPMS designs show superior fatigue resistance, SplitP and Honeycomb lattice structures combine high stiffness and strength. The resulting
Klaus Burkart   +3 more
wiley   +1 more source

Genetic programming elements in fuzzy logic problems

open access: yesRUDN Journal of Engineering Research, 2009
The method of fuzzy control system parameters synthesis and adjustment is given. The method uses genetic programming elements. Fuzzy regulator is included in direct control circuit of nonlinear dynamic object.
J A Malyuk
doaj  

Purchasing Power Parity and the Real Exchange Rate in Bangladesh: A Nonlinear Analysis [PDF]

open access: yes
The long-run purchasing power parity (PPP) hypothesis is examined using data for Bangladesh and its major trading partners - the US, Euro area, Japan and India - during the period 1994 to 2002. We apply recently developed nonlinear econometric techniques
Ibrahim Chowdhury
core  

Piezoresistive Monitoring of Carbon Nanomaterial‐Reinforced Epoxy Composites Under Cyclic and Fatigue Loading: A Review

open access: yesAdvanced Engineering Materials, EarlyView.
Carbon nanomaterial‐reinforced epoxy composites exhibit pronounced piezoresistive behavior, enabling intrinsic damage sensing under cyclic and fatigue loading. This review critically compares carbon nanotube and graphene systems, correlating filler content, percolation threshold, and gauge factor with sensing stability and damage evolution.
J. M. Parente   +3 more
wiley   +1 more source

Application of unified array calculus to connect 4-D spacetime sensing with string theory and relativity

open access: yesJournal of Geodetic Science, 2013
Array algebra of photogrammetry and geodesy unified multi-linear matrix and tensor operators in an expansion of Gaussian adjustment calculus to general matrix inverses and solutions of inverse problems to find all, or some optimal, parametric solutions ...
Rauhala U. A.
doaj   +1 more source

Valuation and Hedging of Contracts with Funding Costs and Collateralization [PDF]

open access: yes, 2014
The research presented in this work is motivated by recent papers by Brigo et al. (2011), Burgard and Kjaer (2009), Cr\'epey (2012), Fujii and Takahashi (2010), Piterbarg (2010) and Pallavicini et al. (2012).
Bielecki, Tomasz R., Rutkowski, Marek
core  

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