نتایج جستجو برای: homogeneous hidden markov

تعداد نتایج: 187622  

Journal: :CoRR 2011
Vittorio Perduca Grégory Nuel

We suggest new recursive formulas to compute the exact value of the Kullback-Leibler distance (KLD) between two general Hidden Markov Trees (HMTs). For homogeneous HMTs with regular topology, such as homogeneous Hidden Markov Models (HMMs), we obtain a closed-form expression for the KLD when no evidence is given. We generalize our recursive formulas to the case of HMMs conditioned on the observ...

2015
Guangyue Han Jianbo Chen

A hidden Markov process (HMP) is a discrete-time finite-state homogeneous Markov chain observed through a discrete-time memoryless invariant channel. The non-asymptotic equipartition property (NEP) is a bound on the probability of the sample entropy deviating from the entropy rate of a stochastic process, so it can be viewed as a refinement of Shannon-McMillan-Breiman theorem. In this report, w...

Journal: :iranian journal of management studies 2011
sepideh sepideh abdollah aaghaie

due to the effective role of markov models in customer relationship management (crm), there is a lack of comprehensive literature review which contains all related literatures. in this paper the focus is on academic databases to find all the articles that had been published in 2011 and earlier. one hundred articles were identified and reviewed to find direct relevance for applying markov models...

Journal: :journal of biostatistics and epidemiology 0
majid sadeghifar department of statistics, school of basic sciences, bu-ali sina university, hamadan, iran. maryam seyed-tabib department of biostatistics & epidemiology, school of public health, hamadan university of medical sciences, hamadan, iran. saiedeh haji-maghsoudi department of biostatistics & epidemiology, school of public health, hamadan university of medical sciences, hamadan, iran. kourosh noemani department of non-communicable disease, school of health, ahvaz jundishapur university of medical sciences, ahvaz, iran. fariba aalipur-byrgany department of non-communicable disease, school of health, ahvaz jundishapur university of medical sciences, ahvaz, iran.

background & aim: congenital hypothyroidism (ch) is one of the most common endocrine diseases and is a major cause of preventable mental retardation. early diagnosis of ch can help prevent future diseases. although time series techniques are often utilized to forecast future status, they are inadequate to deal with count data with overdispersion. the aim of this study was to apply poisson hidde...

We study the entropy rate of a hidden Markov process, defined by observing the output of a symmetric channel whose input is a first order Markov process. Although this definition is very simple, obtaining the exact amount of entropy rate in calculation is an open problem. We introduce some probability matrices based on Markov chain's and channel's parameters. Then, we try to obtain an estimate ...

روشنایی, قدرت اله, صادقی فر, مجید, صفری, ملیحه, ظهیری, علی,

Background and Objectives: Tuberculosis is a chronic bacterial disease and a major cause of morbidity and mortality. It is caused by a Mycobacterium tuberculosis. Awareness of the incidence and number of new cases of the disease is valuable information for revising the implemented programs and development indicators. time series and regression are commonly used models for prediction but these m...

2008
Lorena CM Viviano

In Hidden Markov Models (HMM) the probability distribution of response Yt (∀t = 1, 2, . . . , T ) at each observation time is conditionally specified on the current hidden or latent state Xt. The sequence of hidden states follows a first order time-homogeneous Markov chain. Discrete time or continuous time HMM are respectively specified by T ⊆ N or T ⊆ R (from now on DHMM and CHMM). In this wor...

1999
André Berchtold

Among the class of discrete time Markovian processes, two models are widely used, the Markov chain and the Hidden Markov Model. A major di erence between these two models lies in the relation between successive outputs of the observed variable. In a visible Markov chain, these are directly correlated while in hidden models they are not. However, in some situations it is possible to observe both...

Intrusion detection systems are responsible for diagnosing and detecting any unauthorized use of the system, exploitation or destruction, which is able to prevent cyber-attacks using the network package analysis. one of the major challenges in the use of these tools is lack of educational patterns of attacks on the part of the engine analysis; engine failure that caused the complete training,  ...

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