18 Matching Annotations
  1. Nov 2023
    1. σ2^β1=1nVar[(Xi−μX)ui][Var(Xi)]2.

      This formula is wrong. It should be as follows: $$Var(\hat{\beta}1) = \frac{\sum{i=1}^N Var(x_i - \bar{x})^2 u_i}{(Var(\sum_{i=1}^N (x_i - \bar{x})^2))}$$

      Otherwise, $\sigma_{\hat{\beta}_1}$ is different for each $u_i$.

  2. Aug 2023
  3. Dec 2021
    1. average sentence complexity

      Formula: total # of punctuation marks used / total # of sentences

    2. average sentence length

      Formula: total # of words / total # of sentences

    3. average line length

      Formula: total # of words / total # of lines

    4. hapax legomena ratio

      Formula: # of words that appear exactly once/total # of words

    5. type-token ratio

      Formula: total # of distinct words / total # of words

  4. Apr 2021
  5. Sep 2020
  6. Oct 2019
    1. probability compounds

      compound probability = 1 - (1 - annual probability of excedence)^n where:

      • annual probability = 0.01
      • n = exposure period = 10 years

      by other hand Mean Recurrence Interval - MRI = Return Period = 1 / annual probability of exceedence, but only if MRI >= 10 years, if not then:

      annual probability of excedence = 1-e(-1/MRI)

  7. Mar 2019
    1. Indicador de cohesión del grupo (IC

      Si el grupo tiene un investigador que no produce, el resultado será inferior. Hay una relación entre el autor y sus productos.

    2. 2.7.Indicadores de producción (ITP

      Revisar la fórmula de medición presentada en la página siguiente.

  8. Nov 2018
    1. Net profit: To calculate net profit for a venture (such as a company, division, or project), subtract all costs, including a fair share of total corporate overheads, from the gross revenues or turnover. Net profit = sales revenue − total costs
  9. May 2017
    1. the variations of various tensors under the Ricci flow: (31)
    2. variation formula for the Ricci tensor (13) where is the trace, and the Lichnerowicz Laplacian (or Hodge-de Rham Laplacian) on symmetric rank (0,2) tensors is defined by the formula (14) and is the usual connection Laplacian.
  10. Nov 2013
    1. n its space-time representation (Ogata, 1998), the ETASmodel is a temporal marked point process model, and a special case of marked Hawks process, withconditional intensity function(t;x;yjHt) =(x;y) +Xti<tk(mi)g(tti)f(xxi;yyijmi)

      Testing out PDF annotation that also include LaTeX rendered formulas.