While precision and recall have served the information extraction community well as two separate measures of system performance, we show that the F -measure, the weighted harmonic mean of precision and recall, exhibits certain undesirable behaviors. To overcome these limitations, we define an error measure, the slot error rate, which combines the different types of error directly, without havin...

[x]i = (x (0) 0 , . . . , x (k−1) 0 , x (0) 1 , . . . , x (k−1) 1 , . . . , x (0) i−1, . . . , x (k−1) i−1 ), [y]i = (y (0) 0 , . . . , y (n−1) 0 , y (0) 1 , . . . , y (n−1) 1 , . . . , y (0) i−1, . . . , y (n−1) i−1 ). The column distance function (CDF) di is the minimum Hamming distance between all pairs of output sequences truncated at length i given that the input sequences differ in the fi...

compared to industrial companies, we have neither enough related literature nor available researches concerning the issue of evaluating the supply chain management as well as supply chain performance. therefore, the current article aims to identify and prioritize measures of evaluating the performance of services supply chain. thus, we first review the related text and define the processes of s...

Stochastic process algebras such as PEPA provide ample support for the component-based construction of models. Tools compute the numerical solution of these models; however, the stochastic process algebra methodology lacks support for the specification and calculation of complex performance measures. This paper addresses that problem by presenting a performance specification language which supp...