Therefore an automatic method, which means an objective and reproducible process, is necessary to determine the threshold value. The results of this investigations show that the threshold value can be determined reproducible in the point of intersection of two normal distributed frequency approximations. [Pg.14]

During the inspection of an unknown object its surface is scanned by the probe and ultrasonic spectra are acquired for many discrete points. Disbond detection is performed by the operator looking at some simple features of the acquired spectra, such as center frequency and amplitude of the highest peak in a pre-selected frequency range. This means that the operator has to perform spectrum classification based on primitive features extracted by the instrument. [Pg.109]

U, - meaning of linear relaxation coefficient for i - element tomogram s, Vi - volume of object, appropriate i -clement tomogram s, po - meaning of linear relaxation coefficient of a matrix material, (p/p)mei - mass relaxation coefficient of metal, wo - faaor of a pore filling material [Pg.598]

By means of the pair SI/El a longitudinal wave travels parallel to the object surface. [Pg.762]

The 3D representation of the test object can be rotated by means of an ARCBALL interface. Clicking on the main client area will produce a circle which is actually the silhouette of a sphere. Dragging the mouse rotates the sphere, and the model moves aceordingly. An arc on the surface of the sphere is drawn for visual feedback of orientation additionally a set of coordinate axes in the bottom left comer provides further feedback. [Pg.767]

In this case, the scattering serves as a means for counting the number of molecules (or particles, or objects) per unit volume (N/V). It is seen that the polarizability, a, will be greater for larger molecules, which will scatter more. If we take the Clausius-Mosotti equation [16] [Pg.1389]

The scattered intensity measured from the isotropic three-dimensional object can be transfonned to the onedimensional mtensity fiinction/j(<3 ) by means of the Lorentz correction [15] [Pg.1406]

The next and very important step is to make a decision about the descriptors we shall use to represent the molecular structures. In general, modeling means assignment of an abstract mathematical object to a real-world physical system and subsequent revelation of some relationship between the characteristics of the object on the one side, and the properties of the system on the other. [Pg.205]

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