mean efficiency
1Efficiency (statistics) — In statistics, efficiency is one measure of desirability of an estimator.The efficiency of an unbiased statistic T is defined as:e(T)=frac{1/mathcal{I}( heta)}{mathrm{var}(T)}where mathcal{I}( heta) is the Fisher information of the sample.Thus… …
2Mean free path — In physics, the mean free path is the average distance covered by a moving particle (such as an atom, a molecule, a photon) between successive impacts (collisions) [1] which modify its direction or energy or other particle properties. Contents 1… …
3Mean effective pressure — The mean effective pressure is a quantity related to the operation of an reciprocating engine and is a valuable measure of an engine s capacity to do work that is independent of engine displacement[1]. When quoted as an indicated mean effective… …
4Root mean square — In mathematics, the root mean square (abbreviated RMS or rms), also known as the quadratic mean, is a statistical measure of the magnitude of a varying quantity. It is especially useful when variates are positive and negative, e.g., sinusoids.It… …
5Spectral efficiency — Spectral efficiency, spectrum efficiency or bandwidth efficiency refers to the information rate that can be transmitted over a given bandwidth in a specific communication system. It is a measure of how efficiently a limited frequency spectrum is… …
6Nash-Sutcliffe efficiency coefficient — The Nash Sutcliffe model efficiency coefficient is used to assess the predictive power of hydrological models. It is defined as:E=1 frac{sum {t=1}^Tleft(Q o^t Q m^t ight)^2}{sum {t=1}^Tleft(Q o^t overline{Q o} ight)^2}where Q o is observed… …
7Nash–Sutcliffe model efficiency coefficient — The Nash–Sutcliffe model efficiency coefficient is used to assess the predictive power of hydrological models. It is defined as: where Qo is observed discharge, and Qm is modeled discharge. Qot is observed discharge at time t.[1] Nash–Sutcliffe… …
8Water efficiency — can be defined as *1) the accomplishment of a function, task, process, or result with the minimal amount of water feasible; *2) an indicator of the relationship between the amount of water required for a particular purpose and the amount of water …
9Pareto efficiency — Pareto efficiency, or Pareto optimality, is an important concept in economics with broad applications in game theory, engineering and the social sciences. The term is named after Vilfredo Pareto, an Italian economist who used the concept in his… …
10brake mean effective pressure — (BMEP) The average pressure in the cylinders of an engine divided by its mechanical efficiency, i.e., the ratio of the power actually delivered at an output shaft to the power developed in the cylinders. It is used as an indication of torque …
