National Repository of Grey Literature 462 records found  beginprevious451 - 460next  jump to record: Search took 0.00 seconds. 
The contribution to the identification of non-linear viscous element of dissipation layer in mechanical systems
Pešek, Luděk
As to identification of non-linear parameters of an inner dissipation layer, the former proposed methods were extanded and numerical programs debugged for the case of dissipation element which in non-linearly dependent on the velocity of vibration.
Identification methods in resonance ultrasound spectroscopy
Landa, Michal ; Kozánek, Jan ; Zolotarev, Igor ; Plešek, Jiří
Among the fundamental characteristics of solids are their elastic constants. During the determination of above constants are identified by fitting methods the natural frequencies and compared with FEM results.
Smoothing identification of systems with small non-linearities from complex transfer function
Kozánek, Jan
This paper deals with the simplified mathematical model of the transfer function of the system with small non-linearities. The iterative smoothing identification method of this system from measured complex transfer function is proposed. The associated near dynamic system is nonconservative, generally non auto-adjoint and non-commutative (with complex eigenvectors) but with simple eigenvalues.
Smoothing identification of systems with small non-linearities from amplitude response characteristic
Kozánek, Jan
This paper deals with the iterative smoothing of the amplitude response characteristic of a nonconservative (but auto-adjoint and commutative) vibrating system with small non-linearities (without jumping). The aim is to determine the complex eigenvalu with cubic stiffness behaviour and real modal coefficients in situation when no phase difference between output and input is known.
Identification of critical speeds using unbalance response data
Balda, Miroslav
A new method of the identification critical speeds out of noisy measurements of rotor responses to an unknown unbalance is described. The identification procedure is based on the fitting experimental data by a response of a Single-Imput Single-Output **em. The method yields natural frequencies with dampings of the rotor out of data measured at a certain point of a machine. The result may serve to estimating planes of modal components of an unbalance.
Identification of nonlinear damping of blades
Balda, Miroslav
A method for identification of damping parameters is described, based on a nonlinear least-squares Matlab procedure.
New physical attacks and security of smart-card
Hrubý, Jaroslav
Power analysis is a successful cryptonalytic technique which extracts secret inforamtion from smart-card by analysing the power consumed during the execution of their internal programs. These attacks are particularly dangerous in financial applications in which users their smart-cards into teller machines which are owned and operated by potentially dishonest entities.

National Repository of Grey Literature : 462 records found   beginprevious451 - 460next  jump to record:
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