جستجوی مقالات مرتبط با کلیدواژه "classification methods" در نشریات گروه "مکانیک"
تکرار جستجوی کلیدواژه «classification methods» در نشریات گروه «فنی و مهندسی»-
For decades, plastic components have been the main parts of products in industries such as food, pharmaceutical, automotive, etc. Generally, these components are created by injection molding machines. Using these machines, raw materials are converted to plastic parts, e.g., bottle caps, dosing spoons, and bumpers. The part of the machine that provisionally holds plastic products is called “Mold” which has a unique form for each product. Since molds are sensitive components with high prices, appropriate care is required. When mold is used as the dynamic part of the machine, it’s a high potential for damages due to incomplete product ejection. Utilizing an automated inspection system is a modern solution to prevent possible problems. In this paper, we propose an intelligent system based on machine vision that consists of image capturing, processing, and classification sections. In the processing section, we have used a novel modified Local Binary Pattern algorithm which leads to the suitable features for classifying images into two categories. To achieve the best classifier, four potent machine learning-based methods are evaluated: KNN, SVM, Random Forest, and Gradient Boosting. This evaluation is based on criteria like F1-score, training and processing time, and the experimental results claim that the SVM method is the best classifier with 11.87ms training time, 9.04us processing time, and F1-Score of 0.96.Keywords: Classification Methods, Injection Molding, Inspection Systems, Local binary pattern, Machine Learning, Machine Vision
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For decades, plastic components have been the main parts of products in industries such as food, pharmaceutical, automotive, etc. Generally, these components are created by injection molding machines. Using these machines, raw materials are converted to plastic parts, e.g., bottle caps, dosing spoons, and bumpers. The part of the machine that provisionally holds plastic products is called “Mold” which has a unique form for each product. Since molds are sensitive components with high prices, appropriate care is required. When mold is used as the dynamic part of the machine, it’s a high potential for damages due to incomplete product ejection. Utilizing an automated inspection system is a modern solution to prevent possible problems. In this paper, we propose an intelligent system based on machine vision that consists of image capturing, processing, and classification sections. In the processing section, we have used a novel modified Local Binary Pattern algorithm which leads to the suitable features for classifying images into two categories. To achieve the best classifier, four potent machine learning-based methods are evaluated: KNN, SVM, Random Forest, and Gradient Boosting. This evaluation is based on criteria like F1-score, training and processing time, and the experimental results claim that the SVM method is the best classifier with 11.87ms training time, 9.04us processing time, and F1-Score of 0.96.
Keywords: Classification Methods, Injection Molding, Inspection Systems, Local binary pattern, Machine Learning, Machine Vision -
بحران های مالی موجود در نظام های بانکی ناشی از عدم توانایی در مدیریت ریسک های اعتباری است. امتیازدهی اعتباری یکی از تکنیک های مدیریت ریسک است که ریسک وام گیرنده را تحلیل می کند. در این مقاله با استفاده از مزایای روش های هوش محاسباتی و محاسبات نرم یک روش ترکیبی جدید به منظور بهبود مدیریت ریسک های اعتباری ارائه شده است. در روش پیشنهادی، به منظور مدل سازی در شرایط عدم قطعیت، پارامترهای شبکه عصبی، شامل وزن ها و خطاها، به صورت فازی در نظر گرفته شده اند. در این روش، ابتدا سیستم مورد مطالعه با استفاده از شبکه های عصبی متامدل بندی شده و سپس با به کارگیری استنتاجات فازی تصمیم بهینه با بیشترین میزان برتری تعیین خواهد شد. نتایج حاصل از به کارگیری روش پیشنهادی بیانگر کارامدی و دقت بالای این روش در تحلیل مسائل امتیازدهی اعتباری است.کلید واژگان: امتیازدهی اعتباری, روش های طبقه بندی, پرسپترون های چندلایه, شبکه های عصبی مصنوعی, منطق فازیFinancial crises in banking systems are due to inability to manage credit risks. Credit scoring is one of the risk management techniques that analyze the borrower's risk. In this paper, using the advantages of computational intelligence as well as soft computing methods, a new hybrid approach is proposed in order to improve credit risk management. In the proposed method, for modeling in uncertainty conditions, parameters of the neural network, including weights and errors, are considered in the form of fuzzy numbers. In this method, the underlying system is firstly modeled using neural networks and then, using fuzzy inferences, the optimal decision will be determined with the highest degree of superiority. Empirical results of using the proposed method indicate the efficiency and high accuracy of this method in analyzing credit rating problems.Keywords: Credit scoring, Classification methods, Multilayer perceptrons (MLPs), Artificial neural networks, Fuzzy logic
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