نتایج جستجو برای: smoothing method

تعداد نتایج: 1643285  

Journal: :Cybernetics and Computer Technologies 2020

1999
Stanley F. Chen Ronald Rosenfeld

In certain contexts, maximum entropy (ME) modeling can be viewed as maximum likelihood training for exponential models, and like other maximum likelihood methods is prone to over tting of training data. Several smoothing methods for maximum entropy models have been proposed to address this problem, but previous results do not make it clear how these smoothing methods compare with smoothing meth...

Journal: :Advances in Astronomy and Space Physics 2014

2013
Daisuke Takeyasu Kazuhiro Takeyasu

In industries, how to improve forecasting accuracy such as sales, shipping is an important issue. There are many researches made on this. In this paper, a hybrid method is introduced and plural methods are compared. Focusing that the equation of exponential smoothing method(ESM) is equivalent to (1,1) order ARMA model equation, new method of estimation of smoothing constant in exponential smoot...

Journal: :Optimization Methods and Software 2015
Yue Lu Liwei Zhang Jia Wu

We discuss the l2-lp (with p ∈ (0, 1)) matrix minimization for recovering low rank matrix. A smoothing approach is developed for solving this non-smooth, non-Lipschitz and non-convex optimization problem, in which the smoothing parameter is used as a variable and a majorization method is adopted to solve the smoothing problem. The convergence theorem shows that any accumulation point of the seq...

2005
James W. Taylor

Adaptive exponential smoothing methods allow smoothing parameters to change over time, in order to adapt to changes in the characteristics of the time series. This paper presents a new adaptive method for predicting the volatility in financial returns. It enables the smoothing parameter to vary as a logistic function of user-specified variables. The approach is analogous to that used to model t...

Journal: :JORS 2011
James W. Taylor

Efficient supply chain management relies on accurate demand forecasting. Typically, forecasts are required at frequent intervals for many items. Forecasting methods suitable for this application are those that can be relied upon to produce robust and accurate predictions when implemented within an automated procedure. Exponential smoothing methods are a common choice. In this empirical case stu...

Journal: :European Journal of Operational Research 1999
Bintong Chen Patrick T. Harker Mustafa Ç. Pinar

In a recent paper by Chen and Mangasarian (C. Chen, O.L. Mangasarian, A class of smoothing functions for nonlinear and mixed complementarity problems, Computational Optimization and Applications 2 (1996), 97±138) a class of parametric smoothing functions has been proposed to approximate the plus function present in many optimization and complementarity related problems. This paper uses these sm...

2005
Feng-Long Huang Ming-Shing Yu

In the paper, an effective technique, based on the non-uniform redistribution probability for novel events (the unknown events), to improve the smoothing method in language models is proposed. Basically, there are two processes in the smoothing methods: 1) discounting and 2) redistributing. Instead of uniform probability assignment to each unseen events used by most smoothing methods, we propos...

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