نتایج جستجو برای: exponentially weighted moving average ewma

تعداد نتایج: 581014  

Journal: :Han-gukbangjaehakoenonmunjip 2022

Baseflow separation method based on the digital filter is a technique for separating baseflow from total streamflow, and appropriate estimation of parameter required analysis. In this study, we reviewed analysis characteristics four methods (Lyne-Hollick, Chapman, Eckhardt, EWMA (exponentially weighted moving average)) according to change in evaluated their applicability. Each was applied Daeri...

Journal: :Mathematics 2021

A multivariate control chart is proposed to detect changes in the process dispersion of multiple correlated quality characteristics. We focus on individual observations, where we monitor data vector-by-vector rather than (rational) subgroups. The developed by applying logarithm diagonal elements estimated covariance matrix. Then, this vector incorporated an exponentially weighted moving average...

Journal: :Quality and Reliability Eng. Int. 2011
Hyun Cheol Lee Daniel W. Apley

Charts for Autocorrelated Processes Hyun Cheol Lee Samsung Electronics, Semiconductor Business Quality Assurance Dept. Banwol-Dong, Hwasung-City Gyeonggi-Do, Korea 445-701 Phone: 82-31-208-4717 Fax: 82-31-208-6699 Email: [email protected] Daniel W. Apley (Corresponding Author) Department of Industrial Engineering and Management Sciences Northwestern University Evanston, IL 60208-3119 Phone: 8...

Journal: :NeuroImage 2007
Martin A Lindquist Christian Waugh Tor D Wager

The general linear model (GLM) approach has arguably become the dominant way to analyze functional magnetic resonance imaging (fMRI) data. It tests whether activity in a brain region is systematically related to some known input function. However, the GLM becomes impractical when the precise timing and duration of psychological events cannot be specified a priori. In this work, we introduce a n...

2009
Jana Eklund George Kapetanios Simon Price

Structural change is a major source of forecast failure. Immediately after a break, forecasting problems are particularly severe due to a lack of information about the new data generation process. Techniques exist for monitoring for structural change in real time, but the optimal post-break strategy is unexplored. We consider two approaches. First, monitoring for change and then combining forec...

2008
Lie Tang Jianzhong Ruan Todd E. Sparks Robert G. Landers Frank Liou

Reviewed, accepted September 10, 2008 A Laser Metal Deposition (LMD) height controller design methodology is presented in this paper. The height controller utilizes the Particle Swarm Optimization (PSO) algorithm to estimate model parameters between layers using measured temperature and track height profiles. The process model parameters for the next layer are then predicted using Exponentially...

2004
Ming-Chang Huang Seyed Hossein Hosseini Hui Lan

In this paper, usage parameter control (UPC) is presented to ensure that each source conforms to its negotiated parameters in ATM networks. To meet the requirements for the policing function, a fuzzy logic-based system is proposed to deal with the congestion control and policing problem in ATM networks. There are four types of different mechanisms, Jump Window (JW), Exponentially Weighted Movin...

2004
Rüdiger Martin Michael Menth

Rate measurements are required for many purposes, e.g. for system analysis and modelling or for live systems that react to measurements. For off-line measurement all data is available in advance. Here, time delay between data collection and data analysis is not an issue. On-line measurement, however, measures rates on the fly. Thus, measurement algorithms that provide their output as timely as ...

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