Results 1 to 10 of about 90,320 (221)

Nordsieck methods with inherent quadratic stability

open access: yesMathematical Modelling and Analysis, 2011
We derive suffcient conditions which guarantee that the stability polynomial of Nordsieck method for ordinary differential equations has only two nonzero roots. Examples of such methods up to order four are presented which are A-and L-stable.
M. Braś
doaj   +4 more sources

Implementation of explicit Nordsieck methods with inherent quadratic stability

open access: yesMathematical Modelling and Analysis, 2013
The present paper deals with the implementation in a variable-step algorithm of general linear methods in Nordsieck form with inherent quadratic stability and large stability regions constructed recently by Braś and Cardone. Various implementation issues
Michel Bras   +2 more
doaj   +5 more sources

Construction of Nordsieck Second Derivative General Linear Methods with Inherent Quadratic Stability

open access: yesMathematical Modelling and Analysis, 2017
This paper describes the construction of second derivative general linear methods in Nordsieck form with stability properties determined by quadratic stability functions. This is achieved by imposing the so–called inherent quadratic stability conditions.
Akram Movahedinejad   +2 more
doaj   +4 more sources

Efficient General Linear Methods of High Order with Inherent Quadratic Stability

open access: yesMathematical Modelling and Analysis, 2014
We search for general linear methods with s internal stages and r = s + 1 external stages of order p = s + 1 and stage order q = s. We require that stability function of these methods has only two non-zero roots.
Michal Bras, Zdzislaw Jackiewicz
doaj   +4 more sources

A Multi-Constraint Co-Optimization LQG Frequency Steering Method for LEO Satellite Oscillators [PDF]

open access: yesSensors
High-precision time–frequency systems are essential for low Earth orbit (LEO) navigation satellites to achieve real-time (RT) centimeter-level positioning services.
Dongdong Wang   +3 more
doaj   +2 more sources

Fuzzy logic based nonlinear blending hybrid control of a kestrel-inspired ornithopter operating in sinusoidal and dryden gusts [PDF]

open access: yesScientific Reports
Persistent gust disturbances and unsteady atmospheric dynamics remain a critical barrier to the stable and efficient flight of ornithopters. However, in nature, millions of avian species exhibit extraordinary inherent stability and aerodynamic ...
S. H. Abbasi   +3 more
doaj   +2 more sources

Cooperative Coverage Control for Heterogeneous AUVs Based on Control Barrier Functions and Consensus Theory [PDF]

open access: yesSensors
This paper addresses the problem of cooperative coverage control for heterogeneous Autonomous Underwater Vehicle (AUV) swarms operating in complex underwater environments.
Fengxiang Mao   +3 more
doaj   +2 more sources

Switchable MPC-based multi-objective regenerative brake control via flow regulation for electric vehicles

open access: yesFrontiers in Robotics and AI, 2023
Recent investigations of the electric braking booster (E-Booster) focus on its potential to enhance brake energy regeneration. A vehicle’s hydraulic system is composed of the E-Booster and electric stability control to control the master cylinder and ...
Mingming Mei   +4 more
doaj   +1 more source

Construction of efficient general linear methods for non-stiff differential systems

open access: yesMathematical Modelling and Analysis, 2012
This paper describes the construction of explicit general linear methods in Nordsieck form with inherent quadratic stability and large areas of the stability region.
Michal Bra´s, Angelamaria Cardone
doaj   +1 more source

Patient-Specific Variations in Biomarkers across Gingivitis and Periodontitis. [PDF]

open access: yesPLoS ONE, 2015
This study investigates the use of saliva, as an emerging diagnostic fluid in conjunction with classification techniques to discern biological heterogeneity in clinically labelled gingivitis and periodontitis subjects (80 subjects; 40/group) A battery of
Radhakrishnan Nagarajan   +4 more
doaj   +1 more source

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