نتایج جستجو برای: algorithm classification

تعداد نتایج: 1182666  

Journal: :Atmospheric Research 2021

The current Geostationary Operational Environmental Satellites (GOES-16 and 17) cloud-top phase classification algorithm is based primarily on empirical thresholds at multiple wavelengths that have varying absorption capabilities for water ice. performance of GOES-16 product largely depends the accuracy selection reflectance ratios. This study aims presenting a novel (the Multi-channel Imager A...

Journal: :Frontiers in Physics 2023

This study highlights the drawbacks of current quantum classifiers that limit their efficiency and data processing capabilities in big environments. The paper proposes a global decision tree paradigm to address these issues, focusing on designing complete classification algorithm is accurate efficient while also considering costs. proposed method integrates Bayesian handle incremental data. app...

Journal: :تحقیقات اقتصادی 0
حمید رضا نویدی دانشگاه شاهد احمد نجومی مرکید حجت میرزازاده

portfolio selection is considered a critically significant decision, firms have to make. as such, much research has been focused on the selection of a portfolio with a controlled level of risk and high expected return. this paper uses a new definition of risk for portfolio selection whereby risk taking is taken as a curve instead of a specific value. in this paper, a genetic algorithm is presen...

Farzaneh Sadeghian, Hadiseh Hasani, Marzieh Jafari,

Background: Autism Spectrum Disorder (ASD) occurs based on the continuous deficit in a person’s verbal skills, visual, auditory, touch, and social behavior. Over the last two decades, one of the most important approaches in studying brain functions in autistic persons is using functional Magnetic Resonance Imaging (fMRI). Objectives: It is common to use all brain regions in functional extracti...

Due to ever-increasing information expansion and existing huge amount of unstructured documents, usage of keywords plays a very important role in information retrieval. Because of a manually-extraction of keywords faces various challenges, their automated extraction seems inevitable. In this research, it has been tried to use a thesaurus, (a structured word-net) to automatically extract them. A...

H. Rajabi Mashhadi, S. A. Seyedin, S. H. Zahiri,

The concepts of robust classification and intelligently controlling the search process of genetic algorithm (GA) are introduced and integrated with a conventional genetic classifier for development of a new version of it, which is called Intelligent and Robust GA-classifier (IRGA-classifier). It can efficiently approximate the decision hyperplanes in the feature space. It is shown experime...

Mehdi Agha Sarram, Razieh Sheikhpour,

Objective: Diabetes is one of the most common metabolic diseases. Earlier diagnosis of diabetes and treatment of hyperglycemia and related metabolic abnormalities is of vital importance. Diagnosis of diabetes via proper interpretation of the diabetes data is an important classification problem. Classification systems help the clinicians to predict the risk factors that cause the diabetes or pre...

Bankruptcy prediction is a major issue in classification of companies. Since bankruptcy is extremely costly, investors, owners, managers, creditors, and government agencies are interested in evaluating the financial status of companies. This study tried to predict bankruptcy among companies registered in Tehran Stock Exchange (Iran) by designing imperialist competitive algorithm and genetic alg...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی 1387

استفاده از ترکیب نتایج چند طبقه بندی کننده یکی از روشهای افزایش کارایی سیستم های بازشناسی الگو است که در سالهای اخیر محققین زیادی به آن پرداخته اند. برای آن که ترکیب نتایج طبقه بندی کننده ها مفید واقع شود باید طبقه بندی کننده های پایه ضمن برخورداری از کارایی قابل قبول، با یکدیگر متفاوت بوده و قاعده ترکیب مناسبی برای تلفیق نتایج آنها به کار گرفته شود. قاعده ترکیب باید به گونه ای انتخاب شود که طب...

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