Analysis of Attending Behaviour to Park-and-Ride Experimental Scheme Using Duration Model

Scattering of Electrons at High - Pressure and Restoration of Image Contrast in High Pressure Scanning Electron Microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100180677 ◽

1990 ◽

Vol 48 (1) ◽

pp. 384-385

Author(s):

J. S. Shah ◽

R. Durkin ◽

A. N. Farley

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

High Pressure ◽

Cross Sections ◽

Single Scattering ◽

Image Contrast ◽

Experimental Scheme ◽

Medium Resolution ◽

Scattering Approximation ◽

Scanning Electron

It is now possible to perform High Pressure Scanning Electron Microscopy (HPSEM) in the range 10 to 2000 Pa. Here the effect of scattering on resolution has been evaluated by calculating the profile of the beam in high pressure and assessing its effect on the image contrast . An experimental scheme is presented to show that the effect of the primary beam ionization is to reduce image contrast but this effect can be eliminated by a novel use of specimen current detection in the presence of an electric field. The mechanism of image enhancement is discussed in terms of collection of additional carriers generated by the emissive components.High Pressure SEM (HPSEM) instrumentation is establishing itself as commercially viable. There are now a number of manufacturers, such as JEOL, ABT, ESCAN, DEBEN RESEARCH, selling microscopes and accessories for HPSEM. This is because high pressure techniques have begun to yield high quality micrographs at medium resolution.To study the effect of scattering on the incident electron beam, its profile - in a high pressure environment - was evaluated by calculating the elastic and inelastic scattering cross sections for nitrogen in the energy range 5-25 keV. To assess the effect of the scattered beam on the image contrast, the modification of a sharp step contrast function due to scattering was calculated by single scattering approximation and experimentally confirmed for a 20kV accelerated beam.

Download Full-text

Automatic Parameters Estimation of the D. Klatt Phoneme Duration Model

Informatica ◽

10.15388/informatica.2016.100 ◽

2016 ◽

Vol 27 (3) ◽

pp. 573-586

Author(s):

Pijus Kasparaitis ◽

Margarita Beniušė

Keyword(s):

Parameters Estimation ◽

Duration Model

Download Full-text

EXPERIMENTAL STUDIES OF REINFORCED CONCRETE STRUCTURES WITH CROSS-SHAPED SPATIAL CRACK UNDER TORSION WITH BENDING

Building and reconstruction ◽

10.33979/2073-7416-2020-92-6-13-25 ◽

2020 ◽

Vol 92 (6) ◽

pp. 13-25

Author(s):

Vl.I. KOLCHUNOV ◽

◽

A.I. DEMYANOV ◽

M.M. MIHAILOV ◽

◽

...

Keyword(s):

Reinforced Concrete ◽

Experimental Determination ◽

Calculation Method ◽

Experimental Studies ◽

Concrete Structures ◽

Design Parameters ◽

Reinforced Concrete Structures ◽

Experimental Scheme

The article offers a method and program for experimental studies of reinforced concrete structures with cross-shaped spatial crack under torsion with bending, the main purpose of which is to check the design assumptions and experimental determination of the design parameters of the proposed calculation method. The conducted experimental studies provide an opportunity to test the proposed calculation apparatus and clarify the regularities for determining deflections, angles of rotation of extreme sections, and stresses in the compressed zone of concrete. For analysis, the article presents a typical experimental scheme for the formation and development of cracks in the form of a sweep, as well as characteristic graphs of the dependence of the angles of rotation of end sections.

Download Full-text