quality characteristic - definição. O que é quality characteristic. Significado, conceito
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O que (quem) é quality characteristic - definição

ASSOCIATION OF COHOMOLOGY CLASSES TO PRINCIPAL BUNDLES
Characteristic classes; Characteristic number

HMS Quality (G62)         
  • HMAS ''Quality'' during her short RAN service
1941 Q AND R-CLASS DESTROYER
HMAS Quality (G62); HMS Quality; HMAS Quality
HMS Quality (G62/D18) was a Q-class destroyer built for the Royal Navy. Entering service in 1942, the destroyer served in several theatres of World War II.
Sound quality         
ASSESSMENT OF THE AUDIO OUTPUT FROM AN ELECTRONIC DEVICE
Sound Quality; Audio quality; Delivered Audio Quality
Sound quality is typically an assessment of the accuracy, fidelity, or intelligibility of audio output from an electronic device. Quality can be measured objectively, such as when tools are used to gauge the accuracy with which the device reproduces an original sound; or it can be measured subjectively, such as when human listeners respond to the sound or gauge its perceived similarity to another sound.
Image quality         
  • Blown highlights are detrimental to image quality. Top: Original image. Bottom: Blown areas highlighted in red.
  • At full resolution, this image has clearly visible compression artifacts, for example along the edges of the rightmost trusses.
CHARACTERISTIC OF AN IMAGE THAT MEASURES PERCEIVED IMAGE DEGRADATION
Image Quality; Picture quality
Image quality can refer to the level of accuracy with which different imaging systems capture, process, store, compress, transmit and display the signals that form an image. Another definition refers to image quality as "the weighted combination of all of the visually significant attributes of an image".

Wikipédia

Characteristic class

In mathematics, a characteristic class is a way of associating to each principal bundle of X a cohomology class of X. The cohomology class measures the extent the bundle is "twisted" and whether it possesses sections. Characteristic classes are global invariants that measure the deviation of a local product structure from a global product structure. They are one of the unifying geometric concepts in algebraic topology, differential geometry, and algebraic geometry.

The notion of characteristic class arose in 1935 in the work of Eduard Stiefel and Hassler Whitney about vector fields on manifolds.