cross section


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Related to cross section: Scattering cross section

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 ?
The process of spreading powder and printing is repeated for each cross section of the object, until the entire geometry has been constructed.
The digitizer is used to locate the nodes of the finite element model using a large drawing or photograph of the tire cross section.
x](E) is the ionization cross section for the relevant subshell, [f.
The 2-D CAD data is used to guide an x-y optical positioning device that directs the laser beam onto the paper, cutting the paper around the periphery of the 2-D cross section only to the depth of one layer of paper.
The electromagnetic field can be shifted over the channel cross section by computer control so that an optimal adaptation to the profile is possible.
3]He nuclear spin for which the capture cross section is very high ([sigma] [up arrow][down arrow] [barn] [approximately equal to] 6000 * [lambda] [[Angstrom]]) are absorbed in this reaction.
It features an integrated base map and interpretation canvas that handles tens of thousands of wells quickly and efficiently, and a geologic cross section builder that features structural and stratigraphic cross section interpretation.
When the team used an electron microscope to examine the woman's hairs in cross section, the shafts appeared abnormal.
1] is the polarizing cross section at the neutron velocity [v.
The increase in N enhancing the uniformity of the cross section tends to increase both the breaking stress and strain.
Inside, an X-ray beam passes through a cross section (or "slice") of the mummy's head.
Wallace, "The website helps educate a global patient and provider community to better understand the prevalence, hardship, and treatment options of this rare disease, and create global understanding among a cross section of medical subspecialties, ultimately leading to quicker, easier, and more widespread global diagnosis, and subsequent treatment regimes.