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Total 568 records

    Middle sized soccer robots: ARVAND

    , Article 3rd Robot World Cup Soccer Games and Conferences, RoboCup 1999, 27 July 1999 through 6 August 1999 ; Volume 1856 , 2000 , Pages 61-73 ; 03029743 (ISSN); 9783540410430 (ISBN) Jamzad, M ; Foroughnassiraei, A ; Chiniforooshan, E ; Ghorbani, R ; Kazemi, M ; Chitsaz, H ; Mobasser, F ; Sadjad, S. B ; Sony Corporation ; Sharif University of Technology
    Springer Verlag  2000
    Abstract
    Arvand is the name of robots specially designed and con-structed by sharif CE team for playing soccer according to RoboCup rules and regulations for the middle size robots. Two different types of robots are made, players and the goal keeper. A player robot consists of three main parts: mechanics (motion mechanism and kicker), hard-ware (image acquisition, processing unit and control unit) and software (image processing, wireless communication, motion control and decision making). The motion mechanism is based on two drive unit, two steer units and a castor wheel. We designed a special control board which uses two microcontrollers to carry out the software system decisions and transfers them... 

    Evaluation of supply chain routes based on control engineering and DEA considering traffic congestion and uncertainty

    , Article International Journal of Business Performance and Supply Chain Modelling ; Volume 13, Issue 2 , 2022 , Pages 139-166 ; 17589401 (ISSN) Babaei, A ; Khedmati, M ; Jokar, M. R. A ; Sharif University of Technology
    Inderscience Publishers  2022
    Abstract
    In this paper, a mathematical model is proposed to assess the flow distribution based on the traffic criterion. In the mathematical model, the resilience and stability criteria are developed based on the concepts of control engineering and optimal control. The results show that the route stability is dependent on the traffic parameter. Then, considering several factors including stability, safety, resilience, risk-averse investment, the environment and noise, a decision-making model is presented to evaluate the performance of the flow distribution routes during crises. Goal programming and data-oriented modelling are used to solve the mathematical model. Data envelopment analysis (DEA) is... 

    New hybrid multi criteria decision making method for offshore windfarm site location in Persian Gulf, Iran

    , Article Ocean Engineering ; Volume 256 , 2022 ; 00298018 (ISSN) Hosseini Dehshiri, S. S ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    Choosing the right location for the sustainable development of offshore wind energy plays an important role in the success of renewable projects. In this regard, in the present study, a new application of the hybrid Fuzzy-SWARA & Fuzzy-WASPAS method was presented to prioritize the suitable area for developing offshore wind projects. For a case study, five regions with high potential for offshore wind energy in the Persian-Gulf have been investigated. Economic assessment was evaluated using the Levelized Cost of energy method. Evaluation of offshore wind farms has been analyzed from various aspects including technical, economic, social, environmental and risk. The SWARA was used for weighting... 

    A new application of multi-criteria decision making in identifying critical dust sources and comparing three common receptor-based models

    , Article Science of the Total Environment ; Volume 808 , 2022 ; 00489697 (ISSN) Hosseini Dehshiri, S. S ; Firoozabadi, B ; Afshin, H ; Sharif University of Technology
    Elsevier B.V  2022
    Abstract
    Dust storms are a common phenomenon in arid and semi-arid regions in West Asia, which has led to high levels of PM10 in local and remote area. The Yazd city in Iran with a high PM10 level located downstream of dust sources in the Middle East and Central Asia. In this study, based on meteorological and PM10 monitoring data, backward trajectory modeling of air parcels related to dust events at Yazd station was performed using the HYSPLIT model in 2012–2019. The trajectory cluster analysis was used to identify the main dust transport pathways and wind systems. Three methods of Cross-referencing Backward Trajectory (CBT), Potential Source Contribution Function (PSCF) and Concentration Weighted... 

    Provide a Model for Evaluating Supply Chain Performance using a Balanced Scorecard to Supply Chain, and the Case of Iran Khodro Diesel

    , M.Sc. Thesis Sharif University of Technology Zeydabadi, Freydun (Author) ; Hajji, Alireza (Supervisor)
    Abstract
    Key conservation organizations to meet customer needs and attitudes of SCM is not only the ultimate goal of customer relationship that the final product delivers, but a sequence of suppliers in this work considers the integration of organizations involved in the synchronization process material, and financial information to improve the competitiveness of the supply chain are examined. The proper functioning of the supply chain , a key role in achieving sustainable success of an organization and its profitability goals, especially. In this regard, the establishment of a system of supply chain performance measurement in continuous improvement of its performance is recommended. In each of the... 

    Decision Analysis and Revenue Management In Health-Care

    , M.Sc. Thesis Sharif University of Technology Samadi, Mohamad Reza (Author) ; Koorosh, Eshghi (Supervisor)
    Abstract
    Nowadays, Resource Capacity Management (RCM) is one of the main challenges for industries which have a limited capacity to meet the demands. Revenue Management (RM) is a technique that controls the supply, improves the quality of Capacity Management and maximizes the revenue. Supplying the products and services to different groups of customers is a decision making problem.While the classic RM techniques take into account only the expected revenue, preferences of decision makers strongly affect the results. In this study, utility theory has been proposed because the healthcare industries are usually nonprofitable and they are not highly focused on the revenue gained by their products and... 

    The Impact of Information Sharing on Performance of an M/M/1 Queueing System

    , M.Sc. Thesis Sharif University of Technology Eshraghi, Mohammad Hossein (Author) ; Abouee-Mehrizi, Hossein (Supervisor)
    Abstract
    Social media can be helpful to people in vast areas, especially in queuing systems, in the real world there is remarkably unknown information like service time, average waiting time or average queue length to customers, thus people are likely to share their experiences to posterior customers who want to use the same service. This research examines the impact of user-generated reviews, on the performances of a Markovian queuing system, we assumed that customers are not aware of the service rate, therefore they will assist next customers by writing reviews about their service time they had experienced. We intend to examine the impact of information on queueing performance such as system... 

    A Model for the Selection and Prioritization of Project Portfolio in the Project-Based Organizations

    , M.Sc. Thesis Sharif University of Technology Sharifi, Atefe (Author) ; Hajji, Alireza (Supervisor)
    Abstract
    During recent years a variety of decision making models for project selecting and priorities have been developed. Most of these models used quantitative indicators for projects evaluating and focused on financial and economic indicators. In this project, a decision support system for project portfolio management in construction industry has been developed. The most important feature of this model that distinct it from others is its relationship with the organization's strategies. On one hand, this model focuses on the organization to ensuring that the projects selected for investment, meet the portfolio strategy and on the other hand, it focuses on project management to delivering projects... 

    Sustainability Assessment of Preventive Maintenance Plans (Case Study: Slurry Seal and Thin Overlay)

    , M.Sc. Thesis Sharif University of Technology Beheshti, Masih (Author) ; Tabatabaee, Nader (Supervisor)
    Abstract
    Preventive maintenance strategies have been considered by highway agencies in order to increase pavement service life and to reduce the costs associated with pavement maintenance. Due to the increasing concern regarding promoting sustainable pavements, consideration of the environmental, economic and performance factors in devising preventive maintenance strategies is of great importance.This study contributes to developing a multicriteria decision-making tool for sustainability evaluation of pavement preventive maintenance strategies. The developed tool, PaveSAT, considers the greenhouse gas emission, net present value, and pavement performance to rank preventive maintenance schemes using... 

    IGDT based robust decision making tool for DNOs in load procurement under severe uncertainty

    , Article IEEE Transactions on Smart Grid ; Volume 4, Issue 2 , 2013 , Pages 886-895 ; 19493053 (ISSN) Soroudi, A ; Ehsan, M ; Sharif University of Technology
    2013
    Abstract
    This paper presents the application of information gap decision theory (IGDT) to help the distribution network operators (DNOs) in choosing the supplying resources for meeting the demand of their customers. The three main energy resources are pool market, distributed generations (DGs), and the bilateral contracts. In deregulated environment, the DNO is faced with many uncertainties associated to the mentioned resources which may not have enough information about their nature and behaviors. In such cases, the classical methods like probabilistic methods or fuzzy methods are not applicable for uncertainty modeling because they need some information about the uncertainty behaviors like... 

    Decision rule of repetitive acceptance sampling plans assuring percentile life

    , Article Scientia Iranica ; Volume 19, Issue 3 , June , 2012 , Pages 879-884 ; 10263098 (ISSN) Aslam, M ; Niaki, S. T. A ; Rasool, M ; Fallahnezhad, M. S ; Sharif University of Technology
    2012
    Abstract
    In this research, Repetitive Group Sampling (RGS) plans are developed for the Weibull and generalized exponential distributions. To design the proposed plans, the median of a life-time is first used as the quality parameter. Then, a decision-making framework is developed, based on first and second type errors. Next, based on acceptable and limiting quality level criteria, tables are obtained to select the parameters of the proposed decision-making framework. The advantages of the proposed method over single sampling plans are discussed at the end  

    Selection of wastewater treatment process based on the analytical hierarchy process and fuzzy analytical hierarchy process methods

    , Article International Journal of Environmental Science and Technology ; Volume 8, Issue 2 , March , 2011 , Pages 267-280 ; 17351472 (ISSN) Karimi, A. R ; Mehrdadi, N ; Hashemian, S. J ; Nabi Bidhendi, G. R ; Tavakkoli Moghaddam, R ; Sharif University of Technology
    2011
    Abstract
    This paper presents an application of the analytical hierarchy process and fuzzy analytical hierarchy process methods for selecting the best wastewater treatment process. The analytical hierarchy process is one of the best ways for deciding among the complex criteria structure in different levels, and the fuzzy analytical hierarchy process is a synthetic extension of the classical method when the fuzziness of the decision makers are considered. After reviewing aerobic treatment processes operated in Iran's industrial estates and determining the main criteria used for treatment process evaluation, they are arranged in a hierarchy structure. Selection of the best wastewater treatment process... 

    Optimizing a bi-objective multi-product multi-period three echelon supply chain network with warehouse reliability

    , Article Expert Systems with Applications ; Volume 42, Issue 5 , April , 2014 , Pages 2615-2623 ; 09574174 (ISSN) Pasandideh, S. H. R ; Niaki, S. T. A ; Asadi, K ; Sharif University of Technology
    Elsevier Ltd  2014
    Abstract
    Bi-objective optimization of a multi-product multi-period three-echelon supply chain network consisting of manufacturing plants, distribution centers (DCs) each with uncertain services, and customer nodes is aimed in this paper. The two objectives are minimization of the total cost while maximizing the average number of products dispatched to customers. The decision variables are: (1) the number and the locations of reliable DCs in the network, (2) the optimum number of items produced by plants, (3) the optimum quantity of transported products, (4) the optimum inventory of products at DCs and plants, and (5) the optimum shortage quantity of the customer nodes. The problem is first formulated... 

    Non-speaker information reduction from Cosine Similarity Scoring in i-vector based speaker verification

    , Article Computers and Electrical Engineering ; Volume 48 , November , 2015 , Pages 226–238 ; 00457906 (ISSN) Zeinali, H ; Mirian, A ; Sameti, H ; BabaAli, B ; Sharif University of Technology
    Elsevier Ltd  2015
    Abstract
    Cosine similarity and Probabilistic Linear Discriminant Analysis (PLDA) in i-vector space are two state-of-the-art scoring methods in speaker verification field. While PLDA usually gives better accuracy, Cosine Similarity Scoring (CSS) remains a widely used method due to simplicity and acceptable performance. In this domain, several channel compensation and score normalization methods have been proposed to improve the performance. We investigate non-speaker information in cosine similarity metric and propose a new approach to remove it from the decision making process. I-vectors hold a large amount of non-speaker information such as channel effects, language, and phonetic content. This type... 

    A medium-term decision model for disCos: Forward contracting and TOU pricing

    , Article IEEE Transactions on Power Systems ; Volume 30, Issue 3 , 2015 , Pages 1143-1154 ; 08858950 (ISSN) Safdarian, A ; Fotuhi Firuzabad, M ; Lehtonen, M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2015
    Abstract
    Time varying prices by motivating customers to reduce their consumption in peak periods propel the electricity industry towards a higher efficiency compared to that of common flat prices. Focusing on time-of-use (TOU) sale prices, this paper establishes a stochastic model for the medium-term decision making problem faced by a distribution company (DisCo). The developed model deals with the DisCo's decisions on the level of involvement in forward contracts and in the pool as well as the sale prices offered to customers. The demand response to TOU prices is captured using a price elasticity matrix (PEM). The objective is to maximize the DisCo's profit while the exposure risk imposed by... 

    Probabilistic multi-objective transmission investment and expansion planning

    , Article International Transactions on Electrical Energy Systems ; Volume 25, Issue 9 , September , 2015 , Pages 1884-1904 ; 20507038 (ISSN) Arabali, A ; Hosseini, S. H ; Moeini Aghtaie, M ; Sharif University of Technology
    John Wiley and Sons Ltd  2015
    Abstract
    In market-based planning studies, the financial aspects of transmission grids have been posed as a major challenge since these are important keys to provide a non-discriminative and competitive environment for energy market participants. In this respect, this paper proposes a probabilistic multi-objective transmission expansion planning algorithm considering private investors' preferences, technical concerns, and random nature of power system uncertainties. The combination of Non-Dominated Sorting Genetic Algorithm II, as a widely-used robust multi-objective optimization technique, and point estimation method is employed to handle non-commensurable probabilistic objective functions. The IEEE... 

    The evaluation of Business Intelligence maturity level in Iranian Banking Industry

    , Article Proceedings - 2010 IEEE 17th International Conference on Industrial Engineering and Engineering Management, IE and EM2010, 29 October 2010 through 31 October 2010 ; October , 2010 , Pages 466-470 ; 9781424464814 (ISBN) Najmi, M ; Sepehri, M ; Hashemi, S ; Sharif University of Technology
    2010
    Abstract
    Business intelligence (BI) is a managerial concept helping managers and organizations to manage information and make factual decisions. Some have introduced Business Intelligence as a process of turning data into information and then into knowledge. This concept has become a popular trend for businesses interested in adding value to their decision making processes. Measurement of maturity in implementing Business Intelligence process in organizations is considered a critical issue. Business intelligence like software development is a process, which expressed in terms of components such as artifacts and workflows. Capability Maturity Model Integrated (CMMI) is developed to define different... 

    An improved discrete probabilistic localization method (I-DPLM) in Wireless Sensor Networks

    , Article INSS 2010 - 7th International Conference on Networked Sensing Systems, 15 June 2010 through 18 June 2010, Kassel ; 2010 , Pages 53-56 ; 9781424479108 (ISBN) Mamandipoor, B ; Shokri, H ; IEEE; IES; GFF; Institute of Nanostructure Technologies and Analytics (INA); HIMA ; Sharif University of Technology
    2010
    Abstract
    Localization of sensor nodes has become a fundamental requirement for many applications over Wireless Sensor Networks (WSNs). In this paper, we propose a range-free approach based on the Received Signal Strength (RSS) changes. A discrete and probabilistic localization method is offered to localize a moving beacon relative to sensor nodes. In this method we came to a more reliable and accurate result without increasing the number of sectors. We achieved a considerable improvement in localization reliability by defining the primary and secondary sectors and utilizing a Kalman approach for making decisions. The decision making process is based on the allocated probabilities given to each of... 

    Importance of KPI in BI system, case study: Iranian industries

    , Article ITNG2010 - 7th International Conference on Information Technology: New Generations, 12 April 2010 through 14 April 2010 ; April , 2010 , Pages 1245-1246 ; 9780769539843 (ISBN) Seify, M ; Premier Hall for Advancing Science and Engineering, Inc. (PHASE) ; Sharif University of Technology
    2010
    Abstract
    In today's competitive world, having an effective business intelligent (BI) system for monitoring and evaluation of industrial and product oriented organizations is vital. A perfect BI must help managers not only to speed up his decision making process; but also to increase quality of their decision. But how? One of the main specifications of an effective BI system is providing managers by correct format of information and at the correct time. Critical Success Factors (CSFs) are a kind of significant factors that must be considered in attaining an organization's goal; and key performance indicators (KPIs) are a type of quantitative and measurable CSF; and one character of an effective BI is... 

    Supplier selection using a clustering method based on a new distance for interval type-2 fuzzy sets: A case study

    , Article Applied Soft Computing Journal ; Volume 38 , 2016 , Pages 213-231 ; 15684946 (ISSN) Heidarzade, A ; Mahdavi, I ; Mahdavi Amiri, N ; Sharif University of Technology
    Elsevier Ltd  2016
    Abstract
    Supplier selection is a decision-making process to identify and evaluate suppliers for making contracts. Here, we use interval type-2 fuzzy values to show the decision makers' preferences and also introduce a new formula to compute the distance between two interval type-2 fuzzy sets. The performance of the proposed distance formula in comparison with the normalized Hamming, normalized Hamming based on the Hausdorff metric, normalized Euclidean and the signed distances is evaluated. The results show that the signed distance has the same trend as our method, but the other three methods are not appropriate for interval type-2 fuzzy sets. Using this approach, we propose a hierarchical...