Yowing moment coefficient - определение. Что такое Yowing moment coefficient
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Что (кто) такое Yowing moment coefficient - определение

IS THE MOMENT (OR TORQUE) PRODUCED BY THE AERODYNAMIC FORCE ON THE AIRFOIL IF THAT AERODYNAMIC FORCE IS CONSIDERED TO BE APPLIED, NOT AT THE CENTER OF PRESSURE, BUT AT THE AERODYNAMIC CENTER OF THE AIRFOIL.
Pitching moment coefficient
  • A graph showing coefficient of pitching moment with respect to [[angle of attack]]. The negative slope for positive α indicates stability in pitching.
  • Pitching moment changes pitch angle

Pearson correlation coefficient         
  • Several sets of (''x'', ''y'') points, with the correlation coefficient of ''x'' and ''y'' for each set. The correlation reflects the strength and direction of a linear relationship (top row), but not the slope of that relationship (middle), nor many aspects of nonlinear relationships (bottom). N.B.: the figure in the center has a slope of 0 but in that case the correlation coefficient is undefined because the variance of ''Y'' is zero.
  • Critical values of Pearson's correlation coefficient that must be exceeded to be considered significantly nonzero at the 0.05 level.
  • prediction interval]] for ''Y'' may be reduced given the corresponding value of ''X''. For example, if ''ρ'' = 0.5, then the 95% prediction interval of ''Y''|''X'' will be about 13% smaller than the 95% prediction interval of ''Y''.
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TYPE OF COEFFICIENT
Pearson r; Pearsonr; Pearson's correlation coefficient; Pearson's r; Pearson's correlation; Product-moment correlation coefficient; Pearson product moment correlation coefficient; Product moment correlation coefficient; Pearson coefficient; Bivariate correlation; Pearson’s correlation coefficient; Pearson's product; Pearson product-moment correlation; Pearson product-moment; Product-moment correlation; Pearson Product Moment Correlation Coefficient; Pearson's coefficient of correlation; Pearson product–moment correlation coefficient; PPMCC; Pearson product-moment correlation coefficient; Pearson correlation; Pearson’s Correlation Coefficient; Pearson's linear correlation coefficient; Circular correlation coefficient; Pearson's product-moment correlation
In statistics, the Pearson correlation coefficient (PCC, pronounced ) ― also known as Pearson's r, the Pearson product-moment correlation coefficient (PPMCC), the bivariate correlation, or colloquially simply as the correlation coefficient ― is a measure of linear correlation between two sets of data. It is the ratio between the covariance of two variables and the product of their standard deviations; thus, it is essentially a normalized measurement of the covariance, such that the result always has a value between −1 and 1.
Attenuation coefficient         
MEASURE FOR THE EXPONENTIAL REDUCTION OF A QUANTITY ALONG A PATH DUE TO ABSORPTION AND SCATTERING
Absorption coefficient; Absorption Coefficient; Linear attenuation coefficient; Linear coefficient; Linear absorption coefficient; Narrow beam attenuation coefficient; Scattering coefficient
The linear attenuation coefficient, attenuation coefficient, or narrow-beam attenuation coefficient characterizes how easily a volume of material can be penetrated by a beam of light, sound, particles, or other energy or matter. A coefficient value that is large represents a beam becoming 'attenuated' as it passes through a given medium, while a small value represents that the medium had little effect on loss.
Minsky moment         
  • Different phases leading to Minsky Moment
SUDDEN, MAJOR COLLAPSE OF ASSET VALUES WHICH GENERATES A CREDIT CYCLE OR BUSINESS CYCLE
Minsky Moment
A Minsky moment is a sudden, major collapse of asset values which marks the end of the growth phase of a cycle in credit markets or business activity.

Википедия

Pitching moment

In aerodynamics, the pitching moment on an airfoil is the moment (or torque) produced by the aerodynamic force on the airfoil if that aerodynamic force is considered to be applied, not at the center of pressure, but at the aerodynamic center of the airfoil. The pitching moment on the wing of an airplane is part of the total moment that must be balanced using the lift on the horizontal stabilizer.: Section 5.3  More generally, a pitching moment is any moment acting on the pitch axis of a moving body.

The lift on an airfoil is a distributed force that can be said to act at a point called the center of pressure. However, as angle of attack changes on a cambered airfoil, there is movement of the center of pressure forward and aft. This makes analysis difficult when attempting to use the concept of the center of pressure. One of the remarkable properties of a cambered airfoil is that, even though the center of pressure moves forward and aft, if the lift is imagined to act at a point called the aerodynamic center, the moment of the lift force changes in proportion to the square of the airspeed. If the moment is divided by the dynamic pressure, the area and chord of the airfoil, the result is known as the pitching moment coefficient. This coefficient changes only a little over the operating range of angle of attack of the airfoil but the change in moment slope against the AOA shown in figure below seems very steep so this should be of change in pitching moment of wing about CG rather than about AC. The combination of the two concepts of aerodynamic center and pitching moment coefficient make it relatively simple to analyse some of the flight characteristics of an aircraft.: Section 5.10