Sentence examples for variance of wind from inspiring English sources
Boxplots of monthly mean (a) wind stress and (b) variance of wind along the major wind axis from Halley (see f and Methods section).
The paper uses historical wind production data from five European countries (Austria, Denmark, France, Germany, and Spain) and applies the Mean-Variance Portoolidentifyy to identify cross-country portfolios that minimise the total variance of wind production for a given level of production.
Variance of wind speed (m/s).
Thus, shrubs function primarily as a visual impediment to most predators of nests, albeit shrubs also can function to create turbulence (measure of variance of wind speed and direction) and reduce the odor plume of the bird nesting within (Conover 2007).
The mean and variance of wind speed can be calculated, using Weibull parameters, as follows [7]: {V}_{mathrm{avg}}=cGamma left(1+frac{1}{K}right) (11) {sigma}^2={C}^2left[varGamma left(1+frac{2}{K}right -{varGamma}^2left(1+frac{2}{K}right -{varGamma}^2left
Besides, incoming winds are classified according to the mean wind speeds (MWSs) and the positive/negative semi-variances of wind speeds (VWSs).
To improve the performances of the method, incoming winds are classified according to mean wind speeds and positive/negative semi-variances of wind speeds, and a group of turbines with similar incoming winds are aggregated together.
(2) If the installation capacity of WFs increases, the power shortage ratio of WFs increases, for instance in WF1 and WF4, when the standard variances of wind power forecasting errors are the same.
The approaches to model the wind speed distributions at hour t in a scenario are presented in the following steps: Step 1: Determine the theoretical distributions based on the estimated mean values and the variances of wind speed at hour t.
With all lagged conditional variances evaluated at the level of the unconditional variance of the wind power time series, the curve relates past wind power shocks (news) to current volatility, so it is named the news impact curve.
The mean and variance of the wind speed observations are [26]: U ¯ = c Γ 1 + 1 k (21) Var U = c 2 Γ 1 + 2 k - Γ 1 + 1 k 2 (22)where U ¯ and Var(U) are the mean and variance of the wind speed data, respectively.
