Modal expansion is adopted to analyze the dynamics model,and the modal truncation method,balanced truncation method and singular perturbation approximation method are used for model reduction,then we can get the low-order model,and the model error by truncation is obtained to provide the reference for the controller design,and the simulation results demonstrate the effectiveness of the method.
The Monte-Carlo simulation method, importance sampling method, descriptive sampling method, truncated importance sampling method, and the combination of descriptive sampling method and other simulation methods are studied in the second part of the thesis.
Effects of physical and grid scales in difference computing of NS equations are analyzed and emphasis is on coupling of fluid mechanics with numerical analysis. The study shows that in normal conditions of NS difference computing, some viscous terms will drop into the truncated error terms of modified differential equation of NS difference scheme.
However, in the way of identifying amplitude coefficients, owing to the problem of energy leaking of the signal in the time domain truncated caused by the traditional amplitude spectrum method, which makes its accuracy very low, so it presents the energy compensation method to improve the computation accuracy of amplitude coefficients. The advantages of this method is: (a) by standing out the local characteristics to realize the amplitude compensation;
In molecular dynamics simulation a fixed cutoff radius is usually chosen for the calculation, and the recommended value of it is scattering, thus it causes trouble of its selection and also influences the precision of the results.
An Estimation of the Truncation Error for the Two-Channel Sampling Formulas
The aim of the article is to obtain an estimation for the truncation error in the
This resulted from the truncation error between the numerical solution and exact solution of the Reynolds stress equations.
Truncation fragments of the α subunit were screened for interactions against these two substrate fragments.
Significant and escalating truncation of the redusome DNA causes cell aging due to an arising and increasing deficit of fRNAs and, for this reason, the lack of required ions near certain structural genes.
This includes the polynomiality of the invariant subalgebra of the symmetric algebra of a (truncated) parabolic subalgebra, the existence of a slice to the regular coadjoint orbits and the construction of maximal Poisson
Maximal Poisson Commutative subalgebras for truncated parabolic
Tight Frames of Polynomials and the Truncated Trigonometric Moment Problem
A simple parametrization is given for the set of positive measures with finite support on the circle group T that are solutions of the truncated trigonometric moment problem:
In the present work we study some weighted inequalities for T*, which is the supremum of the truncated operators associated with T.
Let Γ be a smooth compact convex planar curve with arc length dm and let dσ=ψ dm where ψ is a cutoff function.
The short-wave cutoff boundary of the capillary wave spectrum is established.
Thus, as the particle concentration increases, the central jump in compression [shock wave] moves in the direction of the nozzle cutoff, while the Mach number on the axis of the jet in front of the forward jump diminishes.
The results of an experimental study of a flow of rarefied gas of density ～10-5 g/cm3 beyond the cutoff of a hypersonic nozzle (M?11) by means of an electron beam with energy up to 43 keV are presented.
A study is made of the propagation of three-dimensional acoustic perturbations in a two-dimensional gas flow in axisymmetric channels of variable cross sectional area at frequencies near the cutoff frequency.