ابوالفضل میرزازاده
دانشیار گروه مهندسی صنایع، دانشکدة فنی و مهندسی، دانشگاه خوارزمی تهران
[ 1 ] - ارائۀ یک مدل موجودی/ تولید تک‌فروشنده و تک‌خریدار در حالت کمبود با لحاظ‌کردن نرخ فساد و زمان سررسید در فضای عدم قطعیت مبتنی‌بر تئوری دمپستر شفر
در دنیای واقعی، عدم قطعیت‌های بسیاری وجود دارد. روش‌های زیادی برای لحاظ‌کردن عدم قطعیت درنظر گرفته شده است؛ از جمله روش‌های احتمالی، روش‌های فازی، روش‌های فازی-احتمالی و همچنین روش‌های مبتنی‌بر تئوری گواه. روش فازی یکی از متداول‌ترین روش‌ها در برخورد با پارامترهای غیرقطعی است. با این‌حال، مدل‌های فازی پاسخگوی تمامی حالات عدم قطعیت از جمله اطلاعات تخصیص‌نیافته، ناتمام و بازه‌ای نیستند. از این‌ر...
[ 2 ] - Optimization of the Inflationary Inventory Control Model under Stochastic Conditions with Simpson Approximation: Particle Swarm Optimization Approach
In this study, we considered an inflationary inventory control model under non-deterministic conditions. We assumed the inflation rate as a normal distribution, with any arbitrary probability density function (pdf). The objective function was to minimize the total discount cost of the inventory system. We used two methods to solve this problem. One was the classic numerical approach which turne...
[ 3 ] - Calculation of the fuzzy reliability in Neishabour train disaster; a case study
Fuzzy reliability is often used in analyzing the reliability in the large industrial systems. In this paper, a relatively new method is presented to analyze Neishabour (also called Nishapur, a city in Iran) train disaster. In this regards, by using the certain and uncertain propositions, unreliability circuit of the system is depicted .Due to the inability to provide exact values for the unreli...
[ 4 ] - An inventory model for non-instantaneous deteriorating items with imperfect quality, delay in payments and time value money
In this paper, Economic Order Quantity ( ) based model for non-instantaneous deteriorating items with imperfect quality, permissible delay in payments and inflation is proposed. We adopt a time-dependent demand function. Also, the effects of time value of money are studied using the Discounted Cash Flow approach. Moreover, we assume that orders may contain a random proportion of defective items...
[ 5 ] - The Inventory System Management under Uncertain Conditions and Time Value of Money
This study develops a inventory model to determine ordering policy for deteriorating items with shortages under markovian inflationary conditions. Markov processes include process whose future behavior cannot be accurately predicted from its past behavior (except the current or present behavior) and which involves random chance or probability. Behavior of business or economy, flow of traffic, p...
[ 6 ] - A Literature Review on the Fuzzy Control Chart; Classifications & Analysis
Quality control plays an important role in increasing the product quality. Fuzzy control charts are more sensitive than Shewhart control chart. Hence, the correct use of fuzzy control chart leads to producing better-quality products. This area is complex because it involves a large scope of industries, and information is not well organized. In this research, we provide a literature review of th...
[ 7 ] - Entropic Economic Order Quantity Model for Items with Imperfect Quality Considering Constant Rate of Deterioration under Fuzzy Inflationary Conditions
It was suggested in 2004 by some researchers that it might be possible to improve production systems performance by applying the first and second laws of thermodynamics to reduce system entropy. Then these laws were used to modify the economic order quantity (EOQ) model to derive an equivalent entropic order quantity (EnOQ). Moreover the political instability or uncertainty of a country (as wel...
[ 8 ] - Location of Heath Care Facilities in Competitive and User Choice Environment
The location of facilities anywhere in an area in which several competing facilities already exist and serving the demand points has been brought to light in this work. Because of the great importance of health care systems in the health of the people, these systems have been studied in the present paper. Creation and maintenance of competitive advantage in health care systems requires optimizi...