Paying attention to the health of people in the community is one of the main challenges that has received much attention in recent years. Regarding the importance of the healthcare sector in the life of the community, evaluation of the performance of this sector is important. One of the most practical methods for evaluating performance is the use of data envelopment analysis approach. In this p...

Many systems experience recurrent events. Recurrence data are collected to analyze quantities of interest, such as the mean cumulative number of events or the mean cumulative cost of events. Methods of analysis are available for recurrence data with left and/or right censoring. Due to practical constraints, however, recurrence data are sometimes recorded only in windows with gaps between the wi...

Use of minimal windows enhances the aB algorithm in practical applications as well as in the search of artificially constructed game trees. Nevertheless, there exists no theoretical model to measure the strengths and weaknesses of minimal window search. In particular, it is not known which tree ordering properties are favorable for minimal window search. This paper presents a quantitative analy...

The m-ary method for computing x E partitions the bits of the integer E into words of constant length, and then performs as many multiplications as there are nonzero words. Variable length partitioning strategies have been suggested to reduce the number of nonzero words, and thus, the total numb e r o f m ultiplications. Algorithms for exponentiation using such partitioning strategies are terme...

We present a multi–window method for obtaining the time-frequency spectrum of a non–stationary signal. This method is based on optimal combination of evolutionary spectra that are calculated by using multi– window Gabor expansion. The optimal weights are obtained by using a least square estimation method. An error criterion that is the difference between a reference time–frequency distribution ...

In this work, we present a multiple window Evolutionary Spectral analysis on a nonrectangular time-frequency lattice based on a discrete fractional Gabor expansion. The traditional Gabor expansion uses a fixed, and rectangular time-frequency plane tiling. Many of the practical signals such as speech, music, etc., require a more flexible, non-rectangular time-frequency lattice for a compact repr...

This paper studies an analytic model of parallel discrete-event simulation, comparing the costs and bene ts of extending optimistic processing to the YAWNS synchronization protocol. The basic model makes standard assumptions about workload and routing; we develop methods for computing performance as a function of the degree of optimism allowed, overhead costs of state-saving, rollback, and barr...