نتایج جستجو برای: c45 decision tree

تعداد نتایج: 495511  

Journal: :SN computer science 2022

Abstract Decision trees are a widely used method for classification, both alone and as the building blocks of multiple different ensemble learning methods. The Max Cut decision tree introduced here involves novel modifications to standard, baseline variant classification tree, CART Gini. One modification an alternative splitting metric, Cut, based on maximizing distance between all pairs observ...

1992
C. E. Brodley

Decision tree classification procedures have been largely overlooked in remote sensing applications. In this paper we compare the classification performance of three types of decision trees across three different data sets. The classifiers that are considered include a univariate decision tree, multivariate decision tree, and a hybrid decision tree. Results from an n-fold cross-validation proce...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه هرمزگان - دانشکده مهندسی عمران 1391

در این مطالعه، به منظور محاسبه گسترش جانبی خاک، مدلی آماری بر مبنای الگوریتم رگرسیون غیر خطی (nonlinear regression) تولید شده است که قابلیت پیش بینی دقیق ابعاد این پدیده را دارا می باشد. در این مدل (nlr-2012) داده های پایگاه داده برمبنای پارامتر شیبشان به دو دسته داده های با شیب بزرگتر از 1% و دادههای با شیب بیش از 1% تقسیم می شوند. همچنین مدلی مکمل بر مبنای الگوریتم درخت تصمیم(decision tree al...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده اقتصاد 1393

due to extraordinary large amount of information and daily sharp increasing claimant for ui benefits and because of serious constraint of financial barriers, the importance of handling fraud detection in order to discover, control and predict fraudulent claims is inevitable. we use the most appropriate data mining methodology, methods, techniques and tools to extract knowledge or insights from ...

Journal: :iranian red crescent medical journal 0
farzad ebrahimzadeh instructor of biostatistics, department of public health, faculty of health and nutrition, lorestan university of medical sciences, khorramabad, ir iran; department of biostatistics, faculty of medicine, tarbiat modarres university, tehran, ir iran ali azarbar department of statistics, faculty of sciences, amirkabir university of technology, tehran, ir iran mohammad almasian instructor of english language teaching, department of english language, faculty of medicine, lorestan university of medical sciences, khorramabad, ir iran katayoun bakhteyar instructor of midwifery , department of public health, faculty of health and nutrition, lorestan university of medical sciences, khorramabad, ir iran nasim vahabi department of biostatistics, faculty of medicine, tarbiat modarres university, tehran, ir iran; department of biostatistics, faculty of medicine, tarbiat modarres university, tehran, ir iran. tel: +98-9122139224, fax: +98-2188006544

results overall, the prevalence of unwanted pregnancies was 32.3%. the performance of the models based on the area under the roc curve as the indicator was as follows: artificial neural networks (0.741), decision tree (0.731), and logistic regression (0.712). the highest sensitivity level belonged to the decision tree (73.5%), and the highest specificity level belonged to the artificial neural ...

تیمور توکلی‌هشجین علی‌ماشاءاله کرمانی محمد‌هادی خوش‌تقاضا

قابلیّت ترک‏خوردگی تنشی دو رقم برنج هاشمی و خزر طی فرآیند خشک‏کردن شلتوک مورد بررسی قرار گرفت. شلتوک‏های هر دو رقم با دماهای هوای خشک کردن °C35، °C45، °C55 و °C65 بصورت لایه نازک (ضخامت لایة محصول به اندازة سه دانه) خشک شدند. واکنش توسعة ترک‏تنشی درون آندوسپرم دانه‏های آن‏ها در گذر از رطوبت‏های 18%، 15% و نهایتاً 12% بر پایة تر مورد بررسی قرار گرفت. برای کمّی‏کردن میزان شدت ترک‏های توسعه یافته یا ...

ژورنال: Money and Economy 2019

One of the significant problems of banks and investors in Iran is the lack of precise awareness about the financial performance of each bank and the roadmap for improving the conditions. Besides, the undesirable status of the financial performance of banks becomes evident only when the improvement of conditions is complicated. In this paper, a data mining-based early warning system (EWS) model ...

Fatollah Farhadi Mohammad Saber ارزو سادات عمرانی,

Nitrogen is produced mainly from its most abundant source, the air, using three processes: membrane, pressure swing adsorption (PSA) and cryogenic. The most common method for evaluating a process is using the selection diagrams based on feasibility studies. Since the selection diagrams are presented by different companies, they are biased, and provide unsimilar and even controversial results. I...

Introduction: Attention-Deficit/Hyperactivity Disorder (ADHD) is a well-known neurodevelopmental disorder. Diagnosis and treatment of ADHD can often lead to a developmental trajectory toward positive results. The present study aimed at implementing the decision tree method to recognize children with and without ADHD, as well as ADHD subtypes.  Methods: In the present study, the subjects includ...

Journal: :J. Inf. Sci. Eng. 2001
Ding-An Chiang Wei Chen Yi-Fan Wang Lain-Jinn Hwang

To avoid checking unnecessary or irrelevant conditions of rules, the irrelevant values problem of the decision tree is addressed. We propose an algorithm to remove irrelevant conditions of rules in the process of converting the decision tree to rules according to the semantics of the decision tree. Since our algorithm depends only on the semantics of the decision tree, our algorithm can be inte...

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