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    Public participation role in sustainable urban management by quantitative strategic planning matrix (QSPM)

    , Article International Journal of Environmental Research ; Vol. 8, issue. 4 , 2014 , p. 1309-1314 Shiehbeiki, S ; Abbaspour, M ; Monavari S.M ; Arjmandi R ; Lahijanian, A ; Sharif University of Technology
    Abstract
    Public participation is counted as one of the main indexes in sustainable urban management. Based on their nature, metropolitan cities has several and complex problems. For this purpose Tehran metropolitan area is selected. Quantitative Strategic Planning Matrix (QSPM) weighted through a made-byresearcher questionnaire. The reliability of the model was verified by Cronbach’s alpha coefficient. Evaluation matrix for internal and external factors was equal to 1.944 and 3.413, respectively. The strategies were classified and prioritize by quantitative matrix. Suitable strategies for Tehran city are as follows: developing a strategic plan in field of social control participatory management for... 

    Evolutionary learning methodology: A case study of R&D strategy development

    , Article Technological Forecasting and Social Change ; Volume 80, Issue 5 , 2013 , Pages 956-976 ; 00401625 (ISSN) Hooshangi, S ; Arasti, M. R ; Hounshell, D. A ; Sahebzamani, S ; Sharif University of Technology
    2013
    Abstract
    This article concerns the notion of methodology in strategic management of R&D/technology. Though development of new tools and methods has received much attention during the recent decades, attention to understanding methodologies has remained disproportionally low. In this study we distinguish two methodologies that are used in strategic management of R&D/technology: planning methodology and evolutionary learning methodology. We mainly focus on defining and describing the origins, nature, and characteristics of the latter. We propose a framework for methodology selection by investigating context, content, and process factors. Using this framework, we provide supportive evidence for... 

    Heuristic search by guided enforced hill climbing in fast forward automated planning

    , Article Journal of Scientific and Industrial Research ; Volume 68, Issue 4 , 2009 , Pages 278-284 ; 00224456 (ISSN) Akramifar, A ; Ghasem Sani, G ; Sharif University of Technology
    2009
    Abstract
    Enforced hill climbing (EHC), a heuristicaa search method, has been frequently used in a number of AI planning systems. This paper presents a new form of EHC, guided enforced hill climbing (GEHC), to enhance EHC efficiency. Main feature in GEHC is an adaptive ordering function. GEHC has shown a significant improvement in EHC efficiency, especially when applied to larger problems  

    Stochastic Location Based Method Workflow Planning in Construction Project

    , M.Sc. Thesis Sharif University of Technology Ghannad, Pedram (Author) ; Mortaheb, Mohammad Mehdi (Supervisor)
    Abstract
    Most construction projects contain activities repeated in project units or locations with definite consequence. These kinds of projects are called repetitive projects. One of the fundamental objectives of planning and scheduling of repetitive projects is using resources optimally and without interruption, a concept known as continuous workflow. Traditional planning and scheduling methods like Critical Path Method (CPM) are criticized for their disability to produce a reliable workflow. Ignoring the concept of workflow in project schedule causes time and cost overrun that arise from additional waiting times and also increase the risk of accessibility to resources on time. Therefore in this... 

    A multi-objective robust optimization model for logistics planning in the earthquake response phase

    , Article Transportation Research Part E: Logistics and Transportation Review ; Volume 49, Issue 1 , 2013 , Pages 217-249 ; 13665545 (ISSN) Najafi, M ; Eshghi, K ; Dullaert, W ; Sharif University of Technology
    2013
    Abstract
    Usually, resources are short in supply when earthquakes occur. In such emergency situations, disaster relief organizations must use these scarce resources efficiently to achieve the best possible emergency relief. This paper therefore proposes a multi-objective, multi-mode, multi-commodity, and multi-period stochastic model to manage the logistics of both commodities and injured people in the earthquake response. Also, a robust approach is developed and used to make sure that the distribution plan performs well under the various situations that can follow an earthquake. Afterwards, it proposes a solution methodology according to hierarchical objective functions and uses it to illustrate the... 

    Fair profit contract for a carrier collaboration framework in a green hub network under soft time-windows: Dual lexicographic max-min approach

    , Article Transportation Research Part E: Logistics and Transportation Review ; Volume 91 , 2016 , Pages 129-151 ; 13665545 (ISSN) Niknamfar, A. H ; AkhavanNiaki, S. T ; Sharif University of Technology
    Elsevier Ltd  2016
    Abstract
    This paper models a novel and practical bi-objective hub-location problem under a centralized carrier collaboration framework between one holding company and multiple carriers. The holding company first establishes a hub-and-spoke network in order to locate p hubs and to assign the center nodes to the located hubs. Then, it allocates the transportation routes of the hub network to the carriers. In contrast, the carriers should select an appropriate vehicle type to serve the transportation requests in a green hub network. The carriers are also able to meet the transportation requests within a certain time-window based on a soft time-window mechanism. Moreover, aiming to emphasize green... 

    Asteroid precision landing via Probabilistic Multiple-Horizon Multiple-Model Predictive Control

    , Article Acta Astronautica ; Volume 161 , 2019 , Pages 531-541 ; 00945765 (ISSN) AlandiHallaj, M ; Assadian, N ; Sharif University of Technology
    Elsevier Ltd  2019
    Abstract
    This paper seeks to provide a probabilistic control framework, named Probabilistic Multiple-Horizon Multiple-Model Predictive Control, for the soft and precise landing on an asteroid. The modified version of the Predictive Path Planning method is also introduced to generate a safe and smooth reference trajectory for landing. The Probabilistic Multiple-Horizon Multiple-Model Predictive Control is carried out in two phases; the offline phase to calculate the difference between models, and the online phase to use a probabilistic approach to track the reference trajectory. The difference of the dynamical models is utilized in the online control method to compensate the accuracy of the... 

    A new and efficient authentication scheme for vehicular ad hoc networks

    , Article Journal of Intelligent Transportation Systems: Technology, Planning, and Operations ; Volume 24, Issue 2 , 2020 , Pages 171-183 Bayat, M ; Barmshoory, M ; Pournaghi, S. M ; Rahimi, M ; Farjami, Y ; Aref, M. R ; Sharif University of Technology
    Taylor and Francis Inc  2020
    Abstract
    In the past decades, Vehicular Ad hoc Networks (VANETs) have been increasingly developed. Providing secure and efficient communication is essential in VANETs. One of most important challenges in the secure and efficient communications is proposing an appropriate authentication scheme. In this paper, we suggest an efficient and novel authentication scheme for VANETs. In the proposed scheme, vehicles authenticate each other without any limitation such as need for group of signers, online Road Side Units (RSUs), a set of pseudo identities and tamper-proof devices. Moreover, our simulation shows that the proposed scheme is well designed and efficient. © 2019, © 2019 Taylor & Francis Group, LLC  

    A strategic planning model for natural gas transmission networks

    , Article Energy Policy ; Volume 35, Issue 11 , 2007 , Pages 5656-5670 ; 03014215 (ISSN) Kabirian, A ; Hemmati, M. R ; Sharif University of Technology
    2007
    Abstract
    The design and development of natural gas transmission pipeline networks are multidisciplinary problems that require various engineering knowledge. In this problem, the type, location, and installation schedule of major physical components of a network including pipelines and compressor stations are decided upon over a planning horizon with least cost goal and subject to network constraints. Practically, this problem has been viewed as a conceptual design case and not as an optimization problem that tries to select the best design option among a set of possible solutions. Consequently, conceptual design approaches are usually suboptimal and work only for short-run development planning. We... 

    Heavy mobile crane lift path planning in congested modular industrial plants using a robotics approach

    , Article Automation in Construction ; Volume 122 , 2021 ; 09265805 (ISSN) Kayhani, N ; Taghaddos, H ; Mousaei, A ; Behzadipour, S ; Hermann, U ; Sharif University of Technology
    Elsevier B.V  2021
    Abstract
    Lift path planning is a significant subtask in constructability analysis, sequencing, and scheduling of congested industrial modular projects, impacting project cost, and safety. Although intuitive lift planning is still prevalent among the practitioners, this manual process might be tedious and error-prone for hundreds of lifts. This research presents an automated lift path planning method for heavy crawler cranes in no-walk scenarios employing a robotics approach. This method treats the lifted object as a three-degree-of-freedom convex mobile robot with discretized rotational and continuous translational motions. The proposed resolution-complete method models the crane capacity chart,... 

    A new motion planning method for discretely actuated hyper-redundant manipulators

    , Article Robotica ; February , 2015 ; 02635747 (ISSN) Motahari, A ; Zohoor, H ; Habibnejad Korayem, M ; Sharif University of Technology
    Cambridge University Press  2015
    Abstract
    A hyper-redundant manipulator is made by mounting the serial and/or parallel mechanisms on top of each other as modules. In discrete actuation, the actuation amounts are a limited number of certain values. It is not feasible to solve the kinematic analysis problems of discretely actuated hyper-redundant manipulators (DAHMs) by using the common methods, which are used for continuous actuated manipulators. In this paper, a new method is proposed to solve the trajectory tracking problem in a static prescribed obstacle field. To date, this problem has not been considered in the literature. The removing first collision (RFC) method, which is originally proposed for solving the inverse kinematic... 

    A new motion planning method for discretely actuated hyper-redundant manipulators

    , Article Robotica ; Volume 35, Issue 1 , 2017 , Pages 101-118 ; 02635747 (ISSN) Motahari, A ; Zohoor, H ; Habibnejad Korayem, M ; Sharif University of Technology
    Cambridge University Press  2017
    Abstract
    A hyper-redundant manipulator is made by mounting the serial and/or parallel mechanisms on top of each other as modules. In discrete actuation, the actuation amounts are a limited number of certain values. It is not feasible to solve the kinematic analysis problems of discretely actuated hyper-redundant manipulators (DAHMs) by using the common methods, which are used for continuous actuated manipulators. In this paper, a new method is proposed to solve the trajectory tracking problem in a static prescribed obstacle field. To date, this problem has not been considered in the literature. The removing first collision (RFC) method, which is originally proposed for solving the inverse kinematic... 

    A continuous RRT*-based path planning method for non-holonomic mobile robots using B-spline curves

    , Article Journal of Ambient Intelligence and Humanized Computing ; 2022 ; 18685137 (ISSN) Eshtehardian, S. A ; Khodaygan, S ; Sharif University of Technology
    Springer Science and Business Media Deutschland GmbH  2022
    Abstract
    Rapidly exploring random trees (RRT) are sampling-based approaches being widely applied for path planning of mobile robots. Since the output of these algorithms usually is a stream of discrete lines involving discontinuity at the linking points, kinematic constraints restrict the robot's movements. Consequently, robots may not pass discrete points in the path correctly. Hence, the using CAGD (Computer-Aided Geometry Design) curves can run simultaneously alongside those algorithms or may run after that to make a smooth path and that's the way in which non-holonomic constraints can be considered perfect and robots can be droved autonomously across them about the collision detection method... 

    A strategic management model for evaluation of health, safety and environmental performance

    , Article Environmental Monitoring and Assessment ; Volume 184, Issue 5 , 2012 , Pages 2981-2991 ; 01676369 (ISSN) Abbaspour, M ; Toutounchian, S ; Roayaei, E ; Nassiri, P ; Sharif University of Technology
    Abstract
    Strategic health, safety, and environmental management system (HSE-MS) involves systematic and cooperative planning in each phase of the lifecycle of a project to ensure that interaction among the industry group, client, contractor, stakeholder, and host community exists with the highest level of health, safety, and environmental standard performances. Therefore, it seems necessary to assess the HSE-MS performance of contractor(s) by a comparative strategic management model with the aim of continuous improvement. The present Strategic Management Model (SMM) has been illustrated by a case study and the results show that the model is a suitable management tool for decision making in a contract...