راشد صحراییان
استادیار گروه مهندسی صنایع، دانشکده فنی و مهندسی، دانشگاه شاهد، تهران، ایران
[ 1 ] - رویکرد شبیه‌سازی- بهینه‌سازی برای یافتن توالی بهینه در مسئلۀ پویای تولید کارگاهی دارای خرابی و دوباره‌کاری
در این مقاله سعی شده است با ادغام شبیه‌سازی و الگوریتم ژنتیک رویکردی پیشنهاد شود که بتوان از آن در هر مسئلۀ تولید کارگاهی که قابلیت مدل‌شدن با شبیه‌سازی را داشته باشد استفاده کرد. در رویکرد پیشنهادی برای درنظرگیری محدودیت‌هایمسئله از مدل شبیه‌سازی و برای بهینه‌سازی از الگوریتم ژنتیک استفاده می‌شود. بدین منظور ماتریسی به‌عنوان رابط تعریف می‌شود که هم‌زمان نقش بردار کنترلی برای مدل شبیه‌سازی و نم...
[ 2 ] - رویکرد شبیه‌سازی در حل مسأله زمان‌بندی ماشین های موازی پردازشگر دسته ای با زمان های احتمالی
در این مقاله، مسأله زمان‌بندی ماشین‌های موازی پردازشگر دستهای با هدف حداقل کردن حداکثر زمان تکمیل کارها بررسی می‌شود. نوآوری این پژوهش، به کارگیری زمان های پردازش و در دسترس بودن کارها به صورت احتمالی است. در تحقیقات پیشین اثبات شده است که مسأله مورد بررسی دارای پیچیدگی سخت است. بنابراین، از روشهای ابتکاری برای حل مسأله استفاده می‌شود. مسأله مورد مطالعه، دو مرحله تصمیم‌گیری دارد. در مرحله ا...
[ 3 ] - ارائه یک مدل CLSC غیرقطعی با رویکرد ترکیبی الگوریتم ژنتیک و ε-Constraint
در این مقاله یک مدل غیر قطعی زنجیره تأمین حلقه بسته ، توسعه داده شده است. هدف اول این مدل، حداکثر سازی سود کل زنجیره می‌باشد. تابع هدف دوم، حداقل سازی استفاده از مواد خام است. به عبارت دیگر هدف دوم حداکثر کردن میزان بازیافت می‌باشد؛ که یکی از دلایل پیدایش سیستم‌های حلقه بسته نیز همین امر بود. بهینه سازی در مدل مذکور توسط الگوریتم ژنتیک صورت گرفته و توسط روش ε-Constraint به یافتن خط بهینه پارتو ...
[ 4 ] - Two-echelon Supply Chain Considering Multiple Retailers with Price and Promotional Effort Sensitive Non-linear Demand
This study deals with the effects of a supply chain (SC) with single product, multiple retailers and a manufacturer, where the manufacturer(he) produces lotsize of the product that contains a random portion of imperfect quality item. The imperfect quality products are sold in a secondary shop. The new contribution of this paper is a new non-linear demand function. Demand of the end customers va...
[ 5 ] - New Formulation and Solution in PCB Assembly Systems with Parallel Batch processors
This paper considers the scheduling problem of parallel batch processing machines with non-identical job size and processing time. In this paper, a new mathematical model with ready time and batch size constraints is presented to formulate the problem mathematically, in which simultaneous reduction of the makespan and earliness-tardiness is the objective function. In recent years, the nature-in...
[ 6 ] - Solving Single Machine Sequencing to Minimize Maximum Lateness Problem Using Mixed Integer Programming
Despite existing various integer programming for sequencing problems, there is not enoughinformation about practical values of the models. This paper considers the problem of minimizing maximumlateness with release dates and presents four different mixed integer programming (MIP) models to solve thisproblem. These models have been formulated for the classical single machine problem, namely sequ...
[ 7 ] - A Two-Stage Hybrid Flowshop Scheduling Problem with Serial Batching
In this paper the problem of serial batch scheduling in a two-stage hybrid flow shop environment with minimizing Makesapn is studied. In serial batching it is assumed that jobs in a batch are processed serially, and their completion time is defined to be equal to the finishing time of the last job in the batch. The analysis and implementation of the prohibited transference of jobs among the mac...
[ 8 ] - A Reliability Approach on Redesigning the Warehouses in Supply Chain with Uncertain Parameters via Integrated Monte Carlo Simulation and Tuned Artificial Neural Network
In this paper, a reliability approach on reconfiguration decisions in a supply chain network is studied based on coupling the simulation concepts and artificial neural network. In other words, due to the limited budget for warehouse relocation in a supply chain, the failure probability is assessed for determining the robust decision for future supply chain configuration. Traditional solving ...
[ 9 ] - A multi-objective Two-Echelon Capacitated Vehicle Routing Problem for perishable products
This article addresses a general tri-objective two-echelon capacitated vehicle routing problem (2E-CVRP) to minimize the total travel cost, customers waiting times and carbon dioxide emissions simultaneously in distributing perishable products. In distributing perishable products, customers’ satisfaction is very important and is inversely proportional to the customers waiting times. The propose...
[ 10 ] - A New model for integrated lot sizing and scheduling in flexible job shop problem
In this paper an integrated lot-sizing and scheduling problem in a flexible job shop environment with machine-capacity-constraint is studied. The main objective is to minimize the total cost which includes the inventory costs, production costs and the costs of machine’s idle times. First, a new mixed integer programming model,with small bucket time approach,based onProportional Lot sizing and S...
[ 11 ] - A game Theoretic Approach to Pricing, Advertising and Collection Decisions adjustment in a closed-loop supply chain
This paper considers advertising, collection and pricing decisions simultaneously for a closed-loop supplychain(CLSC) with one manufacturer(he) and two retailers(she). A multiplicatively separable new demand function is proposed which influenced by pricing and advertising. In this paper, three well-known scenarios in the game theory including the Nash, Stackelberg and Cooperative games are expl...
[ 12 ] - ارائۀ کران پایین مطلوب به‌منظور زمان‌بندی زنجیرۀ تأمین دومرحله‌ای با درنظرگرفتن زمان آماده‌سازی متفاوت
در این پژوهش، زمان‌بندی زنجیرة تأمین دومرحله‌ای، شامل تولیدکنندگان و توزیع‌کنندگان بررسی شده است. پردازش کارها با ماشین‌های بسته‌بندی سریالی صورت می‌گیرد. وسایل نقلیه، کارها را برای پردازش‌های بیشتر به مشتریان تحویل می‌دهند. ظرفیت هر دسته محدود است و هزینة واحد تحویل هر دسته ثابت و مستقل از تعداد کارها در هر دسته محسوب می‌شود. زمان پردازش و آماده‌سازی کارها با توجه به انواع آن‌ها نیز متفاوت است...
[ 13 ] - Trucks Scheduling in a Multi-product Cross Docking System with Multiple Temporary Storages and Multiple Dock Doors
In order to reduce costs and increase efficiency of a supply chain system, cross docking is one of the most important strategies of warehousing for consolidation shipments from different suppliers to different customers. Products are collected from suppliers by inbound trucks and then moved to customers by outbound trucks through cross dock. Scheduling of trucks plays important role in the cros...
[ 14 ] - Multi-objective Differential Evolution for the Flow shop Scheduling Problem with a Modified Learning Effect
This paper proposes an effective multi-objective differential evolution algorithm (MDES) to solve a permutation flow shop scheduling problem (PFSSP) with modified Dejong's learning effect. The proposed algorithm combines the basic differential evolution (DE) with local search and borrows the selection operator from NSGA-II to improve the general performance. First the problem is encoded with a...
[ 15 ] - Capacitated Multimodal Structure of a Green Supply Chain Network Considering Multiple Objectives
In this paper, a supply chain network design problem is explained which contains environmental concerns in arcs and nodes of network. It is assumed that there are some routes such as road, rail and etc. in each pair of nodes. In this model decision variables are choosing facilities to open, environmental investment level in each facility and flow of products between nodes in each route. A multi...
[ 16 ] - Comparing Two-Echelon and Single-Echelon Multi-Objective Capacitated Vehicle Routing Problems
This paper aims to compare a two-echelon and a single-echelon distribution system. A mathematical model for the Single-Echelon Capacitated Vehicle Routing Problem (SE-CVRP) is proposed. This SE-CVRP is the counterpart of Two-Echelon Capacitated Vehicle Routing Problem (2E-CVRP) introduced in the authors’ previous work. The proposed mathematical model is Mixed-Integer Non-Linear Programming (MIN...
[ 17 ] - A New Approach Generating Robust and Stable Schedules in m-Machine Flow Shop Scheduling Problems: A Case Study
This paper considers a scheduling problem with uncertain processing times and machine breakdowns in industriall/office workplaces and solves it via a novel robust optimization method. In the traditional robust optimization, the solution robustness is maintained only for a specific set of scenarios, which may worsen the situation for new scenarios. Thus, a two-stage predictive algorithm is prop...
[ 18 ] - A Stochastic Model for Prioritized Outpatient Scheduling in a Radiology Center
This paper discussed the scheduling problem of outpatients in a radiology center with an emphasis on priority. To more compatibility to real-world conditions, we assume that the elapsed times in different stages to be uncertain that follow from the specific distribution function. The objective is to minimize outpatients’ total spent time in a radiology center. The problem is formulated as a fle...
[ 19 ] - Single-machine scheduling considering carryover sequence-dependent setup time, and earliness and tardiness penalties of production
Production scheduling is one of the very important problems that industry and production are confronted with it. Production scheduling is often planned in the industrial environments while productivity in production can improve significantly the expansion of simultaneous optimization of the scheduling plan. Production scheduling and production are two areas that have attracted much attention in...
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