Results 41 to 50 of about 539,000 (325)

Adaptive weighting impact angle optimal guidance law considering seeker’s FOV angle constraints

open access: yesJournal of Systems Engineering and Electronics, 2018
In this paper, a new adaptive optimal guidance law with impact angle and seeker's field-of-view (FOV) angle constraints is proposed. To this end, the generalized optimal guidance law is derived first. A changeable impact angle weighting (IAW) coefficient is introduced and used to modify the guidance law to make it adaptive for all guidance constraints.
Ran LI   +3 more
openaire   +1 more source

Universal upper limit on inflation energy scale from cosmic magnetic field

open access: yes, 2012
Recently observational lower bounds on the strength of cosmic magnetic fields were reported, based on gamma-ray flux from distant blazars. If inflation is responsible for the generation of such magnetic fields then the inflation energy scale is bounded ...
A.E. Broderick   +16 more
core   +1 more source

Efficient simulation of non-crossing fibers and chains in a hydrodynamic solvent [PDF]

open access: yes, 2009
An efficient simulation method is presented for Brownian fiber suspensions, which includes both uncrossability of the fibers and hydrodynamic interactions between the fibers mediated by a mesoscopic solvent.
Allen M. P.   +5 more
core   +4 more sources

A Feature-Based Analysis on the Impact of Set of Constraints for e-Constrained Differential Evolution

open access: yes, 2015
Different types of evolutionary algorithms have been developed for constrained continuous optimization. We carry out a feature-based analysis of evolved constrained continuous optimization instances to understand the characteristics of constraints that ...
Neumann, FranK, Poursoltan, Shayan
core   +1 more source

Impact Angle Constrained Distributed Cooperative Guidance Against Maneuvering Targets With Undirected Communication Topologies

open access: yesIEEE Access, 2020
The problem of impact angle constrained distributed cooperative guidance against maneuvering targets with undirected communication topologies is studied.
Xiaofei Dong, Zhang Ren
doaj   +1 more source

Turning off the Lights: How Dark is Dark Matter? [PDF]

open access: yes, 2010
We consider current observational constraints on the electromagnetic charge of dark matter. The velocity dependence of the scattering cross-section through the photon gives rise to qualitatively different constraints than standard dark matter scattering ...
E. W. Kolb   +4 more
core   +3 more sources

Nonlinear optimal guidance with constraints on impact time and impact angle

open access: yesAutomatica
This paper aims to address the nonlinear optimal guidance problem with impact-time and impact-angle constraints, which is fundamentally important for multiple pursuers to collaboratively achieve a target. Addressing such a guidance problem is equivalent to solving a nonlinear minimum-effort control problem in real time.
Wu, Fanchen   +3 more
openaire   +3 more sources

Reduced Muscular Carnosine in Proximal Myotonic Myopathy—A Pilot 1H‐MRS Study

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Myotonic dystrophy type 2 (proximal myotonic myopathy, PROMM) is a progressive multisystem disorder with muscular symptoms (proximal weakness, pain, myotonia) and systemic manifestations such as diabetes mellitus, cataracts, and cardiac arrhythmias.
Alexander Gussew   +11 more
wiley   +1 more source

Beampattern-Based Tracking for Millimeter Wave Communication Systems

open access: yes, 2016
We present a tracking algorithm to maintain the communication link between a base station (BS) and a mobile station (MS) in a millimeter wave (mmWave) communication system, where antenna arrays are used for beamforming in both the BS and MS.
Cai, Mingming   +6 more
core   +1 more source

Rear wheel torque vectoring model predictive control with velocity regulation for electric vehicles [PDF]

open access: yes, 2015
In this paper we propose a constrained optimal control architecture for combined velocity, yaw and sideslip regulation for stabilisation of the vehicle near the limit of lateral acceleration using the rear axle electric torque vectoring configuration of ...
Longo, Stefano   +2 more
core   +1 more source

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