نتایج جستجو برای: محک آکائیک aic

تعداد نتایج: 3627  

ژورنال: پژوهش های خاک 2015
حسین بیات, علیرضا سپاسخواه لیلا رضائی محمدرضا نیشابوری, نادر نریمان‌زاده ناصر دوات‌گر

صحت توابع انتقالی در پیش­بینی خواص هیدرولیکی خاک را می­توان با استفاده از توابع پرانعطاف افزایش داد. این تحقیق به منظور ارزیابی کارایی توابع با قابلیت انعطاف متفاوت (رگرسیون­های خطی و غیر خطی چند متغیره (MLR)، فیزیکی- تجربی آریا و پاریس (AP)، شبکه عصبی مصنوعی(ANN)، مدیریت داده­ها به روش گروهی (GMDH) در پیش­بینی مقدار آب خاک در حد ظرفیت مزرعه­ای و نقطه پژمردگی دائم خاک­های شالیزاری اجرا گردید. ت...

Journal: :Systematic biology 2006
Michael E Alfaro John P Huelsenbeck

Reversible-jump Markov chain Monte Carlo (RJ-MCMC) is a technique for simultaneously evaluating multiple related (but not necessarily nested) statistical models that has recently been applied to the problem of phylogenetic model selection. Here we use a simulation approach to assess the performance of this method and compare it to Akaike weights, a measure of model uncertainty that is based on ...

2009
Ralph D. Snyder J. Keith Ord

Using an innovations state space approach, it has been found that the Akaike information criterion (AIC) works slightly better, on average, than prediction validation on withheld data, for choosing between the various common methods of exponential smoothing for forecasting. There is, however, a puzzle. Should the count of the seed states be incorporated into the penalty term in the AIC formula?...

1995
R. C. PUETTER

This lecture discusses the role of language and information theory concepts for data compression and solving the inverse problem. The concept of Algorithmic Information Content (AIC) is introduced and shown to be crucial to achieving optimal data compression and optimized Bayesian priors for image reconstruction. The dependence of the AIC on the selection of language then suggests how e±cient c...

2000
Anthony W. Hughes

Given that one-sided hypothesis tests are more powerful than their two-sided counterparts, model selection procedures that employ one-sided information should outperform those that do not. In the frequentist area of econometrics, perhaps the most popular model selection procedures are those based on estimates of the Kullback-Leibler information, Akaike’s (1973) Information Criterion (AIC) being...

2009
PETR SEDLAK YUICHIRO HIROSE MANABU ENOKI JOSEF SIKULA

The information of first-arrival time of acoustic emission (AE) signal is important in event location, event identification and source mechanism analysis. Manual picks are time-consuming and sometimes subjective. Several approaches are used in practice. New first arrival automatic determination technique of AE signals in thin metal plates is presented. Based on Akaike information criterion (AIC...

2015
THOMAS LUMLEY ALASTAIR SCOTT

Model-selection criteria such as AIC and BIC are widely used in applied statistics. In recent years, there has been a huge increase in modeling data from large complex surveys, and a resulting demand for versions of AIC and BIC that are valid under complex sampling. In this paper, we show how both criteria can be modified to handle complex samples. We illustrate with two examples, the first usi...

2004
C. Mitchell Dayton

Methodologists have criticized the use of significance tests in the behavioral sciences but have failed to provide alternative data analysis strategies that appeal to applied researchers. For purposes of comparing alternate models for data, information-theoretic measures such as Akaike AIC have advantages in comparison with significance tests. Model-selection procedures based on a min(AIC) stra...

Journal: :Journal of the American Statistical Association 2010
Yiyun Zhang Runze Li Chih-Ling Tsai

We apply the nonconcave penalized likelihood approach to obtain variable selections as well as shrinkage estimators. This approach relies heavily on the choice of regularization parameter, which controls the model complexity. In this paper, we propose employing the generalized information criterion (GIC), encompassing the commonly used Akaike information criterion (AIC) and Bayesian information...

2009
Yuji Sakatoku Jay Arre Toque Ari Ide-Ektessabi

The purpose of this study is to develop an efficient appraoch for producing hyperspectral images by using reconstructed spectral reflectance from multispectral images. In this study, an indirect reconstruction based on regression analysis was employed because of its stability to noise and its practicality. In this approach however, the regression model selection and channel selection when acqui...

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