cross section

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cross section

1. Maths a plane surface formed by cutting across a solid, esp perpendicular to its longest axis
2. a section cut off in this way
3. Physics a measure of the probability that a collision process will result in a particular reaction. It is expressed by the effective area that one participant presents as a target for the other

Cross Section

 

in hydraulics, the cross section of a liquid stream (in a pipeline, channel, or river) perpendicular to the direction of the flow velocity. If the liquid motion is continuously changing, the cross section is taken as flat and equal to the cross section area of the flow.

cross section

[′krȯs ‚sek·shən]
(geology)
A diagram or drawing that shows the downward projection of surficial geology along a vertical plane, for example, a portion of a stream bed drawn at right angles to the mean direction of the flow of the stream.
An actual exposure or cut which reveals geological features.
(graphic arts)
A diagram or drawing representing a cut at right angles to an axis.
(mapping)
A horizontal grid system that is laid out on the ground for determining contours, quantities of earthwork, and so on, by means of elevations of the grid points.
(mathematics)
The intersection of an n-dimensional geometric figure in some euclidean space with a lower dimensional hyperplane.
A right inverse for the projection of a fiber bundle.
(physics)
An area characteristic of a collision reaction between atomic or nuclear particles or systems, such that the number of reactions which occur equals the product of the number of target particles or systems and the number of incident particles or systems which would pass through this area if their velocities were perpendicular to it. Also known as collision cross section.

cross section

A representation of a building, or portion thereof, drawn as if it were cut vertically to show its interior; often taken at right angles to the longitudinal axis of the building.
References in periodicals archive ?
2--The normalization for the statistical distribution of cross sections errors to the corresponding cross section values for each author has been done.
Golden Software offers six products: Surfer[R] for gridding, contouring and 3D surface mapping; Voxler[R] for 3D data visualization; Grapher[TM] for 2D and 3D graphing; Strater[R] for well log, borehole and cross section plotting; MapViewer[TM] for thematic mapping and spatial analysis; and Didger[R] for digitizing and coordinate conversion.
Georgia Tech's cross section values can now be used by scientists attempting to find water throughout the solar system and beyond.
shows images of the chips cross section for the different cutting speeds and feeds applied
From the groundwater contour map (Figure 11) and the cross sections (Figure 12), it can be observed that Groundwater movement is mainly from the northeast to the southwest in the northern parts of the city and from east to west in the southern parts of the city.
with various compression ratios, and obtained Young's modulus in the radial and tangential directions, and shear modulus and Poisson's ratio on the cross section corresponding to the compression ratios.
In trial 1, a training trial, sagittae of 93 Greenland halibut were examined to compare precision between the two aging methods and to calibrate age readers with respect to the first few annuli on the stained cross sections.
The quizzes should include practical skills questions such as determination of optical properties and modification ratios from fiber cross sections.
Cross sections prepared by MicroCleaving are free of the artifacts often introduced by alternative techniques.