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    Development of a novel solution to enable integration and interoperability for cloud manufacturing

    , Article 6th International Conference on Changeable, September 2016 through 6 September 2016 ; Volume 52 , 2016 , Pages 6-11 ; 22128271 (ISSN) Delaram, J ; Fatahi Valilai, Omid ; Sharif University of Technology
    Elsevier B. V  2016
    Abstract
    Nowadays, manufacturing enterprises have been faced with a globalized competitive environment. In this fierce condition, Cloud Manufacturing paradigm emerged as a promising concept for competition. It provides effective solutions and tools for manufacturing enterprises to collaborate in globalized market. The revolution that Cloud Manufacturing has created is based on the redefinition of the classic methods to those which are appropriate for todays' modern and globalized manufacturing environments. In parallel with cloud-based revolution, the expansion of internet-based technologies has been started. These technologies previously have been applied in many fields and resulted in... 

    A novel solution for manufacturing interoperability fulfillment using interoperability service providers

    , Article 50th CIRP Conference on Manufacturing Systems, CIRP CMS 2017, 3 May 2017 through 5 May 2017 ; Volume 63 , 2017 , Pages 774-779 ; 22128271 (ISSN) Delaram, J ; Fatahi Valilai, O ; Sharif University of Technology
    Elsevier B.V  2017
    Abstract
    The cloud manufacturing paradigm has been known as one of the best solutions for today's competitive manufacturing environments. This paradigm insists on using a manufacturing service oriented approach for fulfilling the manufacturing enterprise resource management by the access to global availability of manufacturing services. The proposed service oriented approach covers a wide area of manufacturing resource management from infrastructures to platforms and applications. However, due to wide global distributions of manufacturing clouds, the service oriented architectures which are designed in the clouds cannot communicate with each other. This is mainly due to concentration of cloud... 

    An architectural view to computer integrated manufacturing systems based onaxiomatic design theory

    , Article Computers in Industry ; Volume 100 , 2018 , Pages 96-114 ; 01663615 (ISSN) Delaram, J ; Fatahi Valilai, O ; Sharif University of Technology
    2018
    Abstract
    The emergence of the globalization paradigm in manufacturing industry has changed the markets’ circumstances, and accordingly manufacturing systems need to be compatibilized with these situations. There are many solutions to assist manufacturing systems for this purpose. Computerized systems and their related solutions were being the most attractive ones for manufacturing systems in recent decade. Developing such systems and exploiting from the advantages of such solutions requires a consistent foundation. Computer Integrated Manufacturing (CIM) emerged as a philosophy to provide such foundation, and to assist the computerized manufacturing solutions. Despite of the high potentials of the... 

    A Novel Framework for Virtual Computer Integrated Manufacturing Paradigm Using Axiomatic Design Theory

    , M.Sc. Thesis Sharif University of Technology Delaram, Jalal (Author) ; Fatahi Valilai, Omid (Supervisor)
    Abstract
    Nowadays, the manufacturing environments have been faced with the globalization paradigm. This paradigm urges the new necessities for manufacturing environments like concentration on customer demands, focus on increase of quality and its continuous improving trend and shortening the products’ lifecycle. These necessities have been considered by many researchers and have led to different ideas in the field of effective and efficient product development and after sales services. Computer Integrated Manufacturing (CIM) is known as the major research field for study, development and proposal of effective IT solutions to fulfill the aforementioned necessities. This research filed has resulted to... 

    A method for automatic tuning the memristance of memristive devices with the capacity of applying to memristive memories

    , Article 2012 International Conference on Computer Systems and Industrial Informatics, ICCSII 2012, 18 December 2012 through 20 December 2012 ; December , 2012 ; 9781467351577 (ISBN) Merrikh Bayat, F ; Merrikh Bayat, F ; Mirebrahimi, N ; Sharif University of Technology
    2012
    Abstract
    Memristor is the fourth fundamental passive circuit element which has potential applications in development of analog memristive memories, neuroscience, and brain simulation. In all of these applications the memristance of the device should be adjusted to the desired value, which is currently performed by trial and error. The aim of this paper is to propose a new method and develop a circuit for automatic adjustment of the memristance of memristive devices. The proposed method is based on the sliding mode control and numerical simulations show that it can be used for tuning the memristance of such devices with a high accuracy  

    EEG based Analysis and Classification of Children with Learning Disability Compared to Normal Children

    , M.Sc. Thesis Sharif University of Technology Mirmohammad Sadeghi, Delaram Alsadat (Author) ; Jahed, Mehran (Supervisor)
    Abstract
    Learning disability (LD) is a neurological condition that interferes with an individual’s ability to store, process, or produce information. There are different types of learning disabilities affecting reading, writing, speaking, spelling, etc. Based on a study conducted by National Center for Learning Disabilities, 2.4 million American public school students are diagnosed with learning disability. They attend school in order to learn and be successful while they do not know their learning process is different from their peers. LD diagnosis in children is especially important as such cases must be identified early enough in order to provide them with proper education.This project targets LD... 

    The neuro-fuzzy computing system with the capacity of implementation on a memristor crossbar and optimization-free hardware training

    , Article IEEE Transactions on Fuzzy Systems ; Vol. 22, Issue. 5 , 2014 , Pages 1272-1287 ; ISSN: 10636706 Merrikh-Bayat, F ; Merrikh-Bayat, F ; Shouraki, S. B ; Sharif University of Technology
    2014
    Abstract
    In this paper, first we present a new explanation for the relationship between logical circuits and artificial neural networks, logical circuits and fuzzy logic, and artificial neural networks and fuzzy inference systems. This shows us that neural networks are working in the same way as logical circuits when the connection between them is through the fuzzy logic. However, themain difference between them is that logical circuits can be constructed without using any kind of optimization-based learning methods. Based on these results, we propose a new neuro-fuzzy computing system. As verified by simulation results, it can effectively be implemented on the memristor crossbar structure and... 

    Memristive fuzzy edge detector

    , Article Journal of Real-Time Image Processing ; Vol. 9, issue. 3 , September , 2014 , pp. 479-489 ; Online ISSN: 1861-8219 Merrikh-Bayat, F ; Bagheri Shouraki, S ; Merrikh-Bayat, F ; Sharif University of Technology
    2014
    Abstract
    Fuzzy inference systems always suffer from the lack of efficient structures or platforms for their hardware implementation. In this paper, we tried to overcome this difficulty by proposing a new method for the implementation of the fuzzy rule-based inference systems. To achieve this goal, we have designed a multi-layer neuro-fuzzy computing system based on the memristor crossbar structure by introducing a new concept called the fuzzy minterm. Although many applications can be realized through the use of our proposed system, in this study we only show how the fuzzy XOR function can be constructed and how it can be used to extract edges from grayscale images. One main advantage of our... 

    Memristor crossbar-based hardware implementation of fuzzy membership functions

    , Article Proceedings - 2011 8th International Conference on Fuzzy Systems and Knowledge Discovery, FSKD 2011, 26 July 2011 through 28 July 2011 ; Volume 1 , July , 2011 , Pages 645-649 ; 9781612841816 (ISBN) Merrikh Bayat, F ; Shouraki, S. B ; Merrikh Bayat, F ; Sharif University of Technology
    2011
    Abstract
    In May 1, 2008, researchers at Hewlett Packard (HP) announced the first physical realization of a fundamental circuit element called memristor that attracted so much interest worldwide. This newly found element can easily be combined with crossbar interconnect technology which this new structure has opened a new field in designing configurable or programmable electronic systems. These systems in return can have applications in signal processing and artificial intelligence. In this paper, based on the simple memristor crossbar structure, we propose new and simple circuits for hardware implementation of fuzzy membership functions. In our proposed circuits, these fuzzy membership functions can... 

    A utility-based matching mechanism for stable and optimal resource allocation in cloud manufacturing platforms using deferred acceptance algorithm

    , Article Journal of Manufacturing Systems ; Volume 60 , 2021 , Pages 569-584 ; 02786125 (ISSN) Delaram, J ; Houshamand, M ; Ashtiani, F ; Fatahi Valilai, O ; Sharif University of Technology
    Elsevier B.V  2021
    Abstract
    Cloud Manufacturing (CM) as a successful manufacturing business model and a major driver of Industry 4.0 has attracted a lot of attention in recent years. CM idea aims to streamline the on-demand provisioning of manufacturing resources and capabilities as services, providing end-users with flexible and scalable services accessible through global networks. This idea created many opportunities and challenges. One of the critical challenges is resource allocation, which determines who interacts with whom and how in the CM platform. The type of the platform is a determining factor for the selection of the appropriate resource allocation. To analyze the impact of the allocation on the utilities,... 

    Stable allocation of services in public cloud manufacturing platforms: A game theory view

    , Article 30th International Conference on Flexible Automation and Intelligent Manufacturing, FAIM 2021, 7 September 2021 through 10 September 2021 ; Volume 55, Issue C , 2021 , Pages 306-311 ; 23519789 (ISSN) Delaram, J ; Houshamnd, M ; Ashtiani, F ; Fatahi Valilai, O ; Sharif University of Technology
    Elsevier B.V  2021
    Abstract
    With unbounding the manufacturing resources and capabilities from shopfloors and being available as on-demand services for everyone who needs, the service allocation problem becomes critical. Despite of private Cloud Manufacturing platforms in which the service allocation problem is an optimization matching problem, in public Cloud Manufacturing platforms the service allocation problem is a matching game between manufacturing providers and consumers. This is a complex form of games that has two sides, one side is the players that has manufacturing resources and capabilities and the other side is the players who want to receives such services. In this paper, we present a matching game model... 

    A matching mechanism for public cloud manufacturing platforms using intuitionistic Fuzzy VIKOR and deferred acceptance algorithm

    , Article International Journal of Management Science and Engineering Management ; Volume 16, Issue 2 , 2021 , Pages 107-122 ; 17509653 (ISSN) Delaram, J ; Fatahi Valilai, O ; Houshamand, M ; Ashtiani, F ; Sharif University of Technology
    Taylor and Francis Ltd  2021
    Abstract
    Online manufacturing platforms are spreading in the manufacturing industry in the shade of Cloud Manufacturing systems. The paper manipulates a matching mechanism for public Cloud Manufacturing platforms based on the Intuitionistic Fuzzy Sets Theory, VIKOR method, and Deferred Acceptance algorithm. The VIKOR method provides a rational, scientific, and systematic approach to enable providers and consumers to evaluate the attributes of each other and develop their preference lists. The method is augmented by the Intuitionistic Fuzzy Sets Theory to grasp the high level of vagueness and uncertainty in the process of preference list development. The utilization of Deferred Acceptance algorithm... 

    Development of public cloud manufacturing markets: a mechanism design approach

    , Article International Journal of Systems Science: Operations and Logistics ; 2022 ; 23302674 (ISSN) Delaram, J ; Houshamand, M ; Ashtiani, F ; Fatahi Valilai, O ; Sharif University of Technology
    Taylor and Francis Ltd  2022
    Abstract
    Online manufacturing markets are new emerging types of markets that are spreading in the shade of public Cloud Manufacturing. This paper introduces a public Cloud Manufacturing market and denotes its differences from a private one. Public Cloud Manufacturing enables service-oriented manufacturing models for everyone in society. The prosperity of such market is tied to appropriate matching between providers to consumers. This paper elaborates on a mechanism to prescribe an appropriate allocation between resources and demands in this public market. The mechanism exploits the VIKOR method to develop preference lists for providers and consumers, the method also is augmented by the Intuitionistic... 

    Multi-phase matching mechanism for stable and optimal resource allocation in cloud manufacturing platforms Using IF-VIKOR method and deferred acceptance algorithm

    , Article International Journal of Management Science and Engineering Management ; Volume 17, Issue 2 , 2022 , Pages 103-111 ; 17509653 (ISSN) Delaram, J ; Houshmand, M ; Ashtiani, F ; Fatahi Valilai, O ; Sharif University of Technology
    Taylor and Francis Ltd  2022
    Abstract
    Public platforms are one of the most important Cloud Manufacturing modes. Public platforms enable an environment for manufacturers and demanders to freely and directly connect with each other. Exploiting the high potentials of public platforms depends on final matching. This paper has developed a multi-phase matching mechanism for stable and optimal resource allocation in public platform. The proposed mechanism grades the demanders using an intuitionistic fuzzy VIKOR method using three measures of quality, time, and sustainability. Then, the mechanism clusters the demanders based on these three measures; and finally, allocates the clusters using the Deferred Acceptance (DA) algorithm to the... 

    Development of public cloud manufacturing markets: a mechanism design approach

    , Article International Journal of Systems Science: Operations and Logistics ; 2023 , Volume 10, Issue 1 ; 23302674 (ISSN) Delaram, J ; Houshamand, M ; Ashtiani, F ; Fatahi Valilai, O ; Sharif University of Technology
    Taylor and Francis Ltd  2023
    Abstract
    Online manufacturing markets are new emerging types of markets that are spreading in the shade of public Cloud Manufacturing. This paper introduces a public Cloud Manufacturing market and denotes its differences from a private one. Public Cloud Manufacturing enables service-oriented manufacturing models for everyone in society. The prosperity of such market is tied to appropriate matching between providers to consumers. This paper elaborates on a mechanism to prescribe an appropriate allocation between resources and demands in this public market. The mechanism exploits the VIKOR method to develop preference lists for providers and consumers, the method also is augmented by the Intuitionistic... 

    Investigation of the scavenging mechanism of tyrosyl radical by hydroxybenzohydroxamic acid derivatives: A DFT study

    , Article Computational and Theoretical Chemistry ; Volume 1018 , 2013 , Pages 35-44 ; 2210271X (ISSN) Bayat, A ; Fattahi, A ; Sharif University of Technology
    2013
    Abstract
    The free radical scavenging activity of a series of hydroxybenzohydroxamic acid derivatives have been studied in gas phase, water and benzene environments, using the density functional theory. Different mechanisms of reactions have been considered: single electron transfer (SET), hydrogen atom transfer (HAT). Rate constants were determined to know if the radical scavenging activity of these compounds proceeds via an H-atom or an electron-transfer mechanism. Calculations showed that the presence of the adjacent hydroxyl groups on phenyl ring increases the radical stability through intramolecular hydrogen bonds. The calculated bond dissociation enthalpy (BDE) values for hydroxyl groups on... 

    A quantum chemical study on the OH radical quenching by natural antioxidant fisetin

    , Article Journal of Physical Organic Chemistry ; Volume 30, Issue 11 , 2017 ; 08943230 (ISSN) Bayat, A ; Fattahi, A ; Sharif University of Technology
    2017
    Abstract
    In this work, the antioxidant ability of fisetin was explored toward hydroxyl (•OH) radical in aqueous and lipid solution using density functional level of theory. Different reaction mechanisms have been studied: hydrogen atom transfer, single electron transfer followed by proton transfer, and radical adduct formation, and sequential proton loss electron transfer. Rate constants for all possible reaction sites have been calculated using conventional transition state theory in conjunction with the Collins-Kimball theory. Branching ratios for the different channels of reaction are reported for the first time. Results show that the reactivity of fisetin toward hydroxyl (•OH) radical takes place... 

    Influence of remote intramolecular hydrogen bonding on the acidity of hydroxy-1,4-benzoquinonederivatives: A DFT study

    , Article Journal of Physical Organic Chemistry ; Volume 32, Issue 4 , 2019 ; 08943230 (ISSN) Bayat, A ; Fattahi, A ; Sharif University of Technology
    John Wiley and Sons Ltd  2019
    Abstract
    In this study, the effects of the remote intramolecular hydrogen bonding on the acidity of hydroxy-1,4-benzoquinone derivatives have been investigated ab initio by employing density functional theory (DFT) methods. The computational studies were performed for both gas and solution (H 2 O, DMSO, and MeCN solutions) phases. Our results indicated that remote hydrogen bonding could play an important role in increasing the acidity of hydroxy-1,4-benzoquinone. Noncovalent interaction reduced density gradient (NCI-RDG) methods were used to visualize the attractive and repulsive interactions in the studied acids and their conjugate bases. Natural bond orbital (NBO) analysis was performed to confirm... 

    An optimal hybrid nuclear norm regularization for matrix sensing with subspace prior information

    , Article IEEE Access ; Volume 8 , 2020 , Pages 130937-130946 Bayat, S ; Daei, S ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2020
    Abstract
    Matrix sensing refers to recovering a low-rank matrix from a few linear combinations of its entries. This problem naturally arises in many applications including recommendation systems, collaborative filtering, seismic data interpolation and wireless sensor networks. Recently, in these applications, it has been noted that exploiting additional subspace information might yield significant improvements in practical scenarios. This information is reflected by two subspaces forming angles with column and row spaces of the ground-truth matrix. Despite the importance of exploiting this information, there is limited theoretical guarantee for this feature. In this work, we aim to address this issue... 

    The free radical scavenging activity of lespedezacoumestan toward ˙OH radical: a quantum chemical and computational kinetics study

    , Article Journal of Physical Organic Chemistry ; Volume 31, Issue 2 , February , 2018 ; 08943230 (ISSN) Bayat, A ; Fattahi, A ; Sharif University of Technology
    John Wiley and Sons Ltd  2018
    Abstract
    The free radical activity of lespedezacoumestan was investigated toward hydroxyl (˙OH) radical in polar and nonpolar media using density functional theory. Four reaction mechanisms including radical adduct formation, hydrogen atom transfer, sequential single electron-proton transfer (SET-PT), and sequential proton loss electron transfer were considered. The rate constants and branching ratio for all possible sites of reaction were calculated and reported for the first time. According to the obtained results, lespedezacoumestan reacts faster with ˙OH radical in aqueous solution than in nonpolar media. Also, lespedezacoumestan is an excellent ˙OH radical scavenger regardless of the environment...