Based on system impulse response, identification problem of the systems described by output error model was studied using correlation analysis, and its basic idea was to use a finite impulse response parameter model to approach the system model, and the model approximation precision was enhanced with the number N of the number of the impulse response parameters increasing.
Through discussions the Drucker-Prager model can be fit to Mohr-Coulomb model when the inner friction angle is large than 22 degree, it can be fit to Mohr-Coulomb model when the inner friction angle is less and equal 22 degree.
According to the theory of any nonlinear function approached by fuzzy controller, fuzzy model was founded with selected nonlinear target function to approach it, and the MSE value was gained, and then the improved model was founded.
The optimum design of the side walls of the supersonic section of a three-dimensional nozzle with two planes of symmetry is considered in the narrow channel model approximation, which reduces three-dimensional to two-dimensional flow.
The method is based on the gel model approximation with new boundary conditions for the minor-ion charge density (counterions and ions of salt).
The experimental data in the high-temperature region of the α-phase (290-1150 K) are approximated by an equation obtained within the two-band model approximation, and in the region of the β-phase-by linear dependence.
A simplified (model) approximation to the general solution is suggested that allows β(α) and α(s) to be written to any loop order.
The time behavior of three parameters characterizing the seismic process development, namely, the number of seismic events, accumulated conventional strain, and total energy of the events, was examined in terms of the model approximation.
Using the mean field model as an approximation to the Euclidean case, we show numerically that the mean field predictions are very accurate even at low dimension, and that the error due to the approximation is O(1/d2).
It is shown that a system of log-linear asset demand functions follows from the exact model as an approximation and performs better than similar types of linear asset demand functions which follow from a negative exponential utility function.
This has allowed us to use a timeinvariant linear model as an approximation to the real system.
The purpose of this Section is to discuss the accuracy of the Pipkin-Rogers model as an approximation to the exact model.
We now explore this model as an approximation to the exact moment-rotation response for torsional motion.
The techniques for noise reduction and contour extraction from radionuclideimages are presented.Normalized Fourier Descriptors are used as the description ofliver shape features.By comparing NFD of unknown shape with those of referenceshapes an automatic shape classification can be achieved.Volumn estimation ismade by best fitting the image to a geometry model.
In this paper, a matrix equation for solving regulator parameters is derived, based on approximating the practical system to a typical two-order model. Corresponding CAD program is provided. Utilizing this program, the design of regulators and simulation tests can be completed automatically and fast when the desirable performance specification and original parameters of the system are input.
This paper presents a new method for solving the inverse problem of twodimensional single density interface.The interface is approached by the rectangle multimodel.The solution of Levenberg(1944)-Marquardt(1963)(L-M)method is simplified by the singular value decomposition.The method does not require good starting values,if the depth of a point on the interface is known,and the iterative procedure of the method is stable and convergs to a reasonable solution.