R-squared, also known as the coefficient of determination, is the statistical measurement of the correlation between an investment’s performance and a specific benchmark index. In other words, it shows what degree a stock or portfolio’s performance can be attributed to a benchmark index.Definit...
Sinc Squared: \delta_n(t) = \frac{\sin^2 (nt)}{n\pi t^2} 例如第一个函数,明显有: \lim_{n\to\infty} = \left\{ \begin{aligned} & \frac{1}{\pi} \frac{n}{1+n^2t^2} = 0,\quad & t\neq 0 \\ & \frac{n}{\pi} = \infty,\quad & t=0 \\ \end{aligned} \righ...
So, the area of the circle is 706.5 mm2 Example 2 Calculate the area of the circle shown below.SolutionA = πr2 square units = (3.14 x 282) cm2 = (3.14 x 28 x 28) cm2 = 2461.76 cm2 Example 3 The area of a circle is 254.34 square yards. What is the radius of the circle?
The expression (2) vanishes at zero and the minimum of m = | m|, |M|. By contrast, in the case of a flat phase space (as used in typical SLHA decay processes in Pythia 8, where the contribution from the squared matrix element |M|2 is unknown and therefore set to unity) the ...
The models’ performances were summarized by the AUROC, AUPRC, the calibration curve, and the Brier score (“the mean squared difference between the predicted probability and the actual outcome”) of their respective testing sets33. The calibration curves were calculated using 10 bins. For ...
For Tmax forecasting on the validation set, CatBoost1 yielded a correlation coefficient (R) of 0.900, Nash–Sutcliffe efficiency (NSE) of 0.810, root mean squared error (RMSE) of 3.447°C, mean absolute error (MAE) of 2.571°C, Willmott's Index (WI) of 0.947, Legates and McCabe Index ...
When contemplating the alarming depression rates in adults with autism spectrum disorder (ASD), there is a need to find factors explaining heightened symptoms of depression. Beyond the impact of autism traits, markedly increased levels of alexithymia traits should be considered as a candidate for expl...
Unique variance explained by each predictor was calculated by the squared semipartial correlation averaged across all models in all possible subsets that included that predictor [50]. The total determination factor R2 of the model represents the sum of GDWs [28]....
Next, find the sum of all of the y values. Like step 1, find the square of this number too. After that, find the sum of all of the squared y values. Then, find the sum of the products of each x value, and its corresponding y. This is ∑k=1nxkyk. Finally, plug all of thes...
依照上面的sumOfSquaredWeights的计算公式,并不能得到elasticseach给出的explain中得queryNorm值。 依据这个具体得样例,在某个field中的真实的queryNorm的真实的计算公式为: sumOfSquaredWeights=(1fieldBoost)2⋅∑t inq(∑((idf(t)⋅t.getBoost())2)(field in searchFields)) 真心搞了了好久才弄明确是通过...