نتایج جستجو برای: markov model

تعداد نتایج: 2133466  

Journal: :journal of medical signals and sensors 0
hamed heravi afshin ebrahimi ehsan olyaee

gait contains important information about the status of the human body and physiological signs. in many medical applications, it isimportant to monitor and accurately analyze the gait of the patient. since walking shows the reproducibility signs in several phases,separating these phases can be used for the gait analysis. in this study, a method based on image processing for extracting phases of...

Journal: :international journal of industrial engineering and productional research- 0
r. sadeghian g.r. jalali-naini j. sadjadi n. hamidi fard

in this paper semi-markov models are used to forecast the triple dimensions of next earthquake occurrences. each earthquake can be investigated in three dimensions including temporal, spatial and magnitude. semi-markov models can be used for earthquake forecasting in each arbitrary area and each area can be divided into several zones. in semi-markov models each zone can be considered as a state...

Journal: :iranian journal of public health 0
a rafei e pasha r jamshidi orak

background: routinely collected data from tuberculosis surveillance system can be used to investigate and monitor the irregularities and abrupt changes of the disease incidence. we aimed at using a hidden markov model in order to detect the abnormal states of pulmonary tuberculosis in iran. methods: data for this study were the weekly number of newly diagnosed cases with sputum smear-positive p...

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,  ...

A common method to study the dynamic behavior of macroeconomic variables is using linear time series models; however, they are unable to explain nonlinear behavior of the series. Given the dependency between stock market and derivatives, the behavior of the underlying asset price can be modeled using Markov switching process properties and the economic regime significance. In this paper, a two-...

Journal: :iranian journal of biotechnology 2008
jalal farzami ebrahim hajizadeh gholamreza babaei-rochee anoshirvan kazemnejad

growing amount of information on biological sequences has made application of statistical approaches necessary for modeling and estimation of their functions. in this paper, sensitivity and specificity of the first and second markov chains for prediction of genes was evaluated using the complete double stranded  dna virus. there were two approaches for prediction of each markov model parameter,...

Journal: :international journal of smart electrical engineering 2013
shohreh monshizadeh mahmoud reza haghifam ali akhavein

a wind farm is a collection of wind turbines built in an area to provide electricity. wind power is a renewable energy resource and an alternative to non-renewable fossil fuels. in this paper impact of wind farms in power system reliability is investigate and a new procedure for reliability assessment of wind farms in hl1 level is proposed. in proposed procedure, application of fuzzy – markov f...

Journal: :journal of advances in computer research 0

software architecture is considered one of the most important indices of software engineering today. software architecture is a technical description of a system indicating its component structures and their relationships, and is the principles and rules governing designing. the success of the software depends on whether the system can satisfy the quality attributes. one of the most critical as...

Bahman Esmaeili Fraydoon Rahnamay Roodposhti Hamid Vaezi Ashtiani

Investors use different approaches to select optimal portfolio. so, Optimal investment choices according to return can be interpreted in different models. The traditional approach to allocate portfolio selection called a mean - variance explains. Another approach is Markov chain. Markov chain is a random process without memory. This means that the conditional probability distribution of the nex...

Journal: :iranian red crescent medical journal 0
seyed moayed alavian baqiyatallah research center for gastroenterology and liver diseases, baqiyatallah university of medical sciences, tehran, ir iran shekoufeh nikfar department of pharmacoeconomics and pharmaceutical administration, faculty of pharmacy, tehran university of medical sciences, tehran, ir iran abbas kebriaeezadeh department of pharmacoeconomics and pharmaceutical administration, faculty of pharmacy, tehran university of medical sciences, tehran, ir iran farhad lotfi health human resource research center, school of management and information sciences, shiraz university of medical sciences, shiraz, ir iran ehsan sanati department of pharmacoeconomics and pharmaceutical administration, faculty of pharmacy, tehran university of medical sciences, tehran, ir iran mohsen rezaei hemami institute of health and wellbeing, health economics and health technology assessment, university of glasgow

conclusions the use of sof + pr regimen or ldv/sof can significantly reduce the incidence of complications associated with the disease. for example, short and long-term outcomes are better than the current drug regimens for hcv genotype 1 patients in all stages of the disease. objectives this study is aimed to assess the cost-effectiveness of the three drug regimens of pegylated interferon and ...

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