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Discharge regime, [1] flow regime, or hydrological regime (commonly termed river regime, but that term is also used for other measurements) is the long-term pattern of annual changes to a stream's discharge at a particular point.
Ordinary least squares regression of Okun's law.Since the regression line does not miss any of the points by very much, the R 2 of the regression is relatively high.. In statistics, the coefficient of determination, denoted R 2 or r 2 and pronounced "R squared", is the proportion of the variation in the dependent variable that is predictable from the independent variable(s).
[1] [2] [3] Trees with very large girths, such as some of the sequoias growing the western United States, can also pose girth measurement problems. If they are growing on even a gentle slope, if girth is measured at 4.5 feet about where the pith of the tree emerges from the ground, the upside of the tape could easily be below ground level.
About 68% of values drawn from a normal distribution are within one standard deviation σ from the mean; about 95% of the values lie within two standard deviations; and about 99.7% are within three standard deviations. [8]
This x-intercept will typically be a better approximation to the original function's root than the first guess, and the method can be iterated. x n+1 is a better approximation than x n for the root x of the function f (blue curve) If the tangent line to the curve f(x) at x = x n intercepts the x-axis at x n+1 then the slope is
75.8 +5.2 −4.9: T. de Jaeger et al. [113] Use Type II supernovae as standardisable candles to obtain an independent measurement of the Hubble constant—7 SNe II with host-galaxy distances measured from Cepheid variables or the tip of the red giant branch. 2020-02-26 73.9 ± 3.0: Megamaser Cosmology Project [80]
By 7 December, Rommel fell back to a defensive line at Gazala, just west of Tobruk, all the while under heavy attack from the Desert Air Force. [147] The Allies kept up the pressure, and Rommel was forced to retreat all the way back to the starting positions he had held in March, reaching El Agheila in December 1941. [ 148 ]
Sulfur polycations, S 2+ 8, S 2+ 4 and S 2+ 19 are produced when sulfur is reacted with oxidizing agents in a strongly acidic solution. [48] The colored solutions produced by dissolving sulfur in oleum were first reported as early as 1804 by C. F. Bucholz, but the cause of the color and the structure of the polycations involved was only ...