Flatness
Encyclopedia
Flatness may refer to:
- Flatness (art)Flatness (art)In art criticism of the 1960s and 1970s, flatness described the smoothness and absence of curvature or surface detail of a two-dimensional work of art. Critic Clement Greenberg believed that flatness, or two-dimensionality, was an essential and desirable quality in painting, a criterion which...
- Flatness (cosmology)Flatness (cosmology)The concept of "curvature of space" is fundamental to cosmology. A space without curvature is called a "flat space" or Euclidean space.Whether the universe is “flat″ could determine its ultimate fate; whether it will expand forever, or ultimately collapse back into itself. The geometry of spacetime...
- Flatness (electrical engineering)Flatness (electrical engineering)When measuring the flatness of a particular non-time-domain response, the measure of flatness defines the difference in a maximum and minimum value. For example, in a frequency response plot for an amplifier the flatness is defined as...
- Flatness (liquids)Flatness (liquids)Flatness refers to the shape of a liquid's free surface. On planet Earth, the flatness of a liquid is a function of the curvature of the Earth, and from trigonometry, can be found to deviate from true flatness by approximately 19.6 nanometers over an area of 1 square meter, a deviation which is...
- Flatness (manufacturing)Flatness (manufacturing)In manufacturing and mechanical engineering, flatness is an important geometric condition for workpieces and tools.In the manufacture of precision parts and assemblies, especially where parts will be required to be connected across a surface area in an air-tight or liquid-tight manner, flatness is...
, a geometrical tolerance required in certain manufacturing situations - Flatness (mathematics)Flatness (mathematics)In mathematics, the flatness of a surface is the degree to which it approximates a mathematical plane. The term is generalized for higher-dimensional manifolds to describe the degree to which they approximate the Euclidean space of the same dimensionality...
- Flatness (systems theory)Flatness (systems theory)Flatness in systems theory is a system property that extends the notion of Controllability from linear systems to nonlinear dynamical systems. A system that has the flatness property is called a flat system. Flat systems have a flat output, which can be used to explicitly express all states and...
, a property of nonlinear dynamic systems - Flat intonationIntonation (music)Intonation, in music, is a musician's realization of pitch accuracy, or the pitch accuracy of a musical instrument. Intonation may be flat, sharp, or both, successively or simultaneously.-Interval, melody, and harmony:...