Abstract:Princeton, NJ 08540 TES (Transform-Expand-Sample) is a versatile methodology for modeling general stationary time series, and particularly those that are autocorrelated. From the viewpoint of Monte Carlo simulation, TES represents a new and flexible input analysis approach. The salient feature of TES is its potential ability to simultaneously capture first-order and second-order properties of empirical time series (field measurements): Given an empirical sample, TES is designed to fit an arbitrary empirical ma… Show more
“…They later proposed an approximate method to analyze the effect of splitting and superposition of autocorrelation processes in queues (Balcıoglu et al, 2008). Some works have shown examples of autocorrelation in data from industrial plants (Luxhoj and Shyur, 1995;Melamed and Hill, 1995;Mertens et al 2009;Schomig and Mittler, 1995;Young and Winistorfer, 2001).…”
Autocorrelation has been pointed out as one of the most challenging issues in manufacturing systems modeling. Numerical experimentation has shown that it may either enhance or harm performance. Furthermore, there is not yet a general agreement in what a realistic autocorrelation model is or whether it is actually relevant for practical applications. This paper provides a simulation analysis of the effects on performance caused by manufacturing process parameters following autoregressive (AR) processes. AR time series are employed for modeling variations in parameters that happen at a time scale different from the corresponding to process cycle execution. Three basic configurations are analyzed: serial line, assembly process and a disassembly process. A case study from the natural slate tiles industry is presented showing the differences obtained in simulation results between a model in which independent and identically distributed (i.i.d.) assumptions are adopted and one in which autocorrelation effects are considered.
“…They later proposed an approximate method to analyze the effect of splitting and superposition of autocorrelation processes in queues (Balcıoglu et al, 2008). Some works have shown examples of autocorrelation in data from industrial plants (Luxhoj and Shyur, 1995;Melamed and Hill, 1995;Mertens et al 2009;Schomig and Mittler, 1995;Young and Winistorfer, 2001).…”
Autocorrelation has been pointed out as one of the most challenging issues in manufacturing systems modeling. Numerical experimentation has shown that it may either enhance or harm performance. Furthermore, there is not yet a general agreement in what a realistic autocorrelation model is or whether it is actually relevant for practical applications. This paper provides a simulation analysis of the effects on performance caused by manufacturing process parameters following autoregressive (AR) processes. AR time series are employed for modeling variations in parameters that happen at a time scale different from the corresponding to process cycle execution. Three basic configurations are analyzed: serial line, assembly process and a disassembly process. A case study from the natural slate tiles industry is presented showing the differences obtained in simulation results between a model in which independent and identically distributed (i.i.d.) assumptions are adopted and one in which autocorrelation effects are considered.
“…In [17], an investigation of TES modeling and multiplexing of MPEG traffic over ATM networks was performed. In [18] [19] H.261 video compression is modeled using the TES methodology. In [20], TES modeling is used to generate models for high bit-rate MPEG4 traffic.…”
Section: Overview Of the Mpeg4 Video Encoding Standardmentioning
confidence: 99%
“…In temporal redundancy, only the differences between successive frames are encoded using frame differencing, motion estimation and motion-compensated prediction [25]. Since the overall video sequence is not stationary as can be seen from the previously mentioned figures, and because of the periodic nature of the autocorrelation function, a TES + model is applied for the I and B frame statistics and a TES~ model is applied for the P frame statistics as it was performed in [18]. In other words, only one model of the video is required, while the rest can just be multiplied by a scaling factor that depends on the video type.…”
“…Analyzing real-world random phenomena using exclusively first-order statistic, is in many cases a valid approach; in other instances, it is a common oversimplification mistake. For variable data rate audio and video algorithms, second-order statistic dependence is to be expected [80]. Undermodeling is the term used in [81] referring to the case where some of dependencies that are relevant to the system in consideration are overlooked.…”
Section: Computation Of Frame Size For Speex Algorithmmentioning
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