نتایج جستجو برای: گشتاورهای تعمیمیافته gmm

تعداد نتایج: 6254  

2014
Changsheng Xu

Gaussian Mixture Model (GMM) with Fuzzy c-means attempts to classify signals into speech and music. Feature extraction is done before classification. The classification accuracy mainly relays on the strength of the feature extraction techniques. Simple audio features such as Time domain and Frequency domain are adopted. The time domain features are Zero Crossing Rate (ZCR) and Short Time Energy...

2010
Reda Jourani Khalid Daoudi Régine André-Obrecht Driss Aboutajdine

Gaussian mixture models (GMM) have been widely and successfully used in speaker recognition during the last decade. However, they are generally trained using the generative criterion of maximum likelihood estimation. In this paper, we propose a simple and efficient discriminative approach to learn GMM with a large margin criterion to solve the classification problem. Our approach is based on a ...

2008
D. C. Naseby

SUMMARY The impact of a Pseudomonas fluorescens strain, genetically modified for kanamycin resistance and lactose utilisation (the GMM), could be enhanced by soil amendment with lactose and kanamycin. Lactose addition decreased the shoot to root ratio of pea, and both soil amendments increased the populations of total culturable bacteria and the inoculated GMM. Only kanamycin perturbed the bact...

2003
Jingdong Wang Jianguo Lee Changshui Zhang

Gaussian Mixture Model (GMM) is an efficient method for parametric clustering. However, traditional GMM can’t perform clustering well on data set with complex structure such as images. In this paper, kernel trick, successfully used by SVM and kernel PCA, is introduced into EM algorithm for solving parameter estimation of GMM, which is so called kernel GMM (kGMM). The basic idea of kernel GMM is...

2016
Naoya Yokoyama Daiki Azuma Shuji Tsukiyama

In statistical methods, such as statistical static timing analysis, Gaussian mixture model (GMM) is a useful tool for representing a non-Gaussian distribution and handling correlation easily. In order to repeat various statistical operations such as summation and maximum for GMMs efficiently, the number of components should be restricted around two. In this paper, we propose a method for reduci...

2003
Stan Z. Li Dong Zhang Chengyuan Ma Harry Shum Eric Chang

The Gaussian mixture models (GMM) has proved to be an effective probabilistic model for speaker verification, and has been widely used in most of state-of-the-art systems. In this paper, we introduce a new method for the task: that using AdaBoost learning based on the GMM. The motivation is the following: While a GMM linearly combines a number of Gaussian models according to a set of mixing wei...

2003
Jingdong Wang Jianguo Lee Changshui Zhang

In this paper, we present a kernel trick embedded Gaussian Mixture Model (GMM), called kernel GMM. The basic idea is to embed kernel trick into EM algorithm and deduce a parameter estimation algorithm for GMM in feature space. Kernel GMM could be viewed as a Bayesian Kernel Method. Compared with most classical kernel methods, the proposed method can solve problems in probabilistic framework. Mo...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد یزد - دانشکده اقتصاد 1392

دولت یکی از بخش های مهم اقتصادی در هر کشور به شمار می رود، دولت علاوه بر نقش هدایت کننده ای که در اقتصاد دارد، در زمینه های تولیدی نیز نقش فعالی را ایفا می نماید. از طرفی فعالیت های دولت می تواند بر تولید بخش خصوصی و در نهایت تولید کل اقتصاد، اثرات مثبت ویا منفی داشته باشد. نقش دولت در قالب وضع قوانین، ایجاد امنیت اقتصادی و اجتماعی، زمینه های لازم برای تولید را فراهم می نماید. همچنین، افزایش بی...

ژورنال: :علوم اقتصادی 2013
سهراب دل انگیزان محمد شریف کریمی زینب خالوندی

مطالعه حاضر با استفاده از داده­های تلفیقی شاخص درک فساد مالی، شاخص نشان­دهنده­ی آزادی اقتصادی و نرخ رشد اقتصادی، تأثیر فساد مالی بر رشد­ اقتصادی را در قالب یک مدل پانل دیتای پویا به روش گشتاورهای تعمیم­یافته (gmm)، در نمونه­ی 156تایی از کشورهای جهان و در دوره­ی زمانی 2000- ۲۰11 بررسی نموده است. نتایج در رابطه با دسته­بندی کشورها نشان می­دهد که در کشورهای با آزادی اقتصادی بالا، رابطه­ی شاخص درک ...

2006
CHIROK HAN PETER C. B. PHILLIPS P. C. B. PHILLIPS

1 This paper provides a first order asymptotic theory for generalized method of moments (GMM) estimators when the number of moment conditions is allowed to increase with the sample size and the moment conditions may be weak. Examples in which these asymptotics are relevant include instrumental variable (IV) estimation with many (possibly weak or uninformed) instruments and some panel data model...

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