Sharif Digital Repository

Nowadays, both academic and industrial environment have come to the conclusion that recent manufacturing paradigms are probably no longer applicable to the ever-changing today’s business environments. That is why manufacturing is moving gradually from production-oriented to service-oriented approaches. Service-oriented manufacturing results in a variety of services through a product life cycle which create an abundance of high value-added markets promoting efficient collaboration and amazing innovation. Cloud Manufacturing as an intelligent newly developed service-oriented manufacturing paradigm provides platforms of shared and interconnected distributed manufacturing resources and... 

With the advent of Internet technology and globalization, the use of enterprise resource planning systems, through the Internet, is growing and indicates access to information and communication as part of a global business strategy.. With the extension of Internet penetration, cloud processing has attracted particular attention. According to this process, due to issues such as maintenance costs, reliability, and scalability, much attention has been paid to cloud enterprise resource planning systems. But major attention has been paid to ERP as a software service, and less has been given to providing cloud platform to develop and integrate enterprise resource planning systems in a supply... 

Regarding to emergence of the globalization concepts in manufacturing, technology and information technology has come to aid of the organizations to expand communication across the globe, in order that companies can overcome many of their deficiencies in this way. To achieve this goal, Cloud Manufacturing (CMfg) system have been investigated, while today the CMfg is a new manufacturing paradigm and is one of the dominant concepts in manufacturing industries. Regarding to the nature of the cloud, the resources used to meet the customer demands are not necessarily concentrated in a specific geographic location, or the demand of a customer may not be satisfied with a distinct service, as a... 

Reconfigurable Manufacturing system (RMS) is used to surge the speed of production and its flexibility of it which is restricted to limited extent. Its flexibility confined to at most that is essential to fabricate the members of a part family. This thesis proposes a novel model for RMS, that, that is a manufacturing framework that is cost-effectively and at the minimum time responses to changesto changes and can fulfill thefulfill marketthe demandmarket demands rapidly. In many researches the minimization of timeof time and cost is the main factors that is making anmake impressionan onimpression projecton the performance of the performanceproject. In the frame offrame theof... 

Staff assessment in a performance management system is the formal process for measuring and providing feedback to employees about the performance and the required actions to accomplish their responsibilities as well as understanding their abilities to plan and empower their future career path development. Enhancing the recovery of organizations creates a massive force that can drive growth and development programs and create organizational opportunities. For this reason, the hypothesis of this research is also given in this regard, which can be used to assess and evaluate the performance of social organizations by determining the criteria for evaluating performance and designing an... 

Today, robots have been widely used in various tasks. Swarm robots are the focus of many researchers because of their low cost and their flexibility. However, due to the nature of dynamics in water and locomotion systems in it, very few of them have been developed. Applications of Swarm Robotics at sea include: the formation of temporary sea bridges, the collection of marine litter, assistance to large ships for maneuvering in ports, and carrying of oceanographic sensors. Therefore, the purpose of this study is to design a system for self-control and autonomy of unmanned surface robots with the ability to connect and carry objects. First, the robot was modeled according to its hydrodynamic... 

The business model is very important, as many researchers in this field believe that the success or failure of a business is highly dependent on right design and application of this model. In most recent innovation studies, application of innovation in business models or developing an innovative business model itself is one of the main factors to enable an organization to have stable status in the competitive market. This is unlike the traditional believes, which technology and process were the main motivators behind organization to stand out in competitive market. Designing a proper business model requires a system thinking approach, which considers both internal interactions factors, and... 

In this thesis, we are going to study the consistency properties of one of the most well-known linear estimators – LASSO estimator. First, we bring up some necessary background for introducing this estimator. Then, we are able to introduce primary and secondary forms of LASSO estimator. After that, we prove that primary form of the LASSO estimator is weakly consistent under certain weak conditions. We, also, prove a much stronger statement about the secondary form. We prove that the secondary form is strongly consistent. What’s more, with extra assumptions, we specify the convergence rate of the estimator. Finally, we propose a method for determining free parameter of primary form of LASSO,... 

E-Work is defined as collaborative, communication-enabled and computer-supported productive activities in distributed organizations consist of humans with robots and autonomous systems. From the levels of nano and micro systems and devices all the way to the level of global enterprise networks, productive work is reshaped by e-Work. The current literature emphasizes on the role of Knowledge management as an enabler of E-Working paradigm. The four main circles of knowledge in e-Work related are: ‘‘e-Work”, ‘‘Integration Coordination and Collaboration”, ‘‘Distributed Decision Support” and ‘‘Active Middleware”. It has been generally recognized that computer and communication science and... 

Organizations adopts different strategies to manage their resources and equipment. This strategies can be categorized through two distinct group. The first group is outsourcing and the second one is in-house management. In some organizations due to the strategic aspects of the equipment, the competitive advantage or restrictive policies, there is a low tendency for outsourcing. Through this approach, the equipment and resources are idle due to partial need on organization. This causes a high amount of investment blockage which faces the organization with high cost of missing investment opportunities. Through the strategic insight, the capitals which have a high potential for making revenue... 

We consider a biased random walk Xn on a Galton-watson tree with leaves in the subballistic regime. We prove that there exists an explicit constant ϒ = ϒ(β) ε (0,1),such that |Xn| is of order n. If Δn be the hitting time of level n, we prove that Δn{n1{ is tight. More ever we show thatΔn{n1{ does not converge in law. We prove that along the sequences npkq Xk\ , Δn{n1{ converges to certain infinity divisible laws. Key tools for the proof are the classical Harris decomposition for Galton-Watson trees, a new variant of regeneration times and the careful analysis of triangular arrays of i.i.d. random variables  

With the advent of the globalization paradigm, the industrial interactions among manufacturing companies have become easier, and the possibility of sharing of the resources among them has been introduced. This issue, coupled with the increasing diversity of customer needs, has led to a change in business models of manufacturing industries and because of that, in the field of globalized manufacturing, a new paradigm called cloud manufacturing has been proposed in which service-orientation is one of the main features. Despite of the extensive studies on cloud manufacturing, the lack of a framework that, based on the service-orientation, determines the improving of manufacturing processes to... 

Nowadays, global competition has challenged old manufacturing concepts for surviving in today's highly competitive industrial market. Moreover, rapid development of Information Technology advantages and their application in manufacturing systems have led to the emergence of Advanced Manufacturing Systems (AMSs). Hence, using the AMSs, can help manufacturing enterprises to survive in the current competitive environment. Cloud manufacturing is one of the most advanced manufacturing system paradigms that has attracted a wide range of researchers and companies’ attention in recent years. Cloud Manufacturing aims to provide easy and on demand access to the shared pool of manufacturing resources... 

Cloud manufacturing is a new paradigm has been in focus for a great deal of research interest in recent years. One of the most important problems in cloud manufacturing is service composition. There is a major problem with service composition issues. Cloud manufacturing is interpreted as a platform in which everything as a service. If the objective function is defined in this platform with the preference of an element, it means that the cloud is private. Most previous studies have been based on private clouds. The problem defined in this study is the first model that has disrupted this rule thoroughly and is the first attempt emphasizing on a realization of public clouds, in which... 

Along with globalization of competition and economy, and development of Internet and Ethernet infrastructures, IoT, artificial intelligence, etc., to modify the impact of changes and volatility, active organizations and product chains have faced with an advanced service-oriented manufacturing model based on complicated networks of operation and logistics service providers. On the other hand, appearing of individualized and customized orders have leaded to more complicated manufacturing procedure and manufacturing industries have been more restricted to satisfy varied demands. In the context of physical products and cyberspace convergence, the novel generation of advanced manufacturing... 

Startups mostly originated from creating an idea and introduced themselves as a new plan for optimization and development in societies. Being exquisite foreclosed any prediction of their future for their owners. On the other hand, the destination of an idea to be a product needs a solution. If the solution matches the structural behavior of the society, it will survive. Simulation of the structural behavior of society through genetic science creates a suitable gadget for the investigation of genetic logic. It accumulated the response of stakeholders of society in that subject according to the standard index in the format of information and database completely and meticulously. It depicts the... 

In this research, we have used green tea polyphenols as green reductants for reduction of graphene oxide. Furthermore, for the first time, the presence of some metals such as iron, tungsten and copper in the efficiency of reduction is investigated. XPS spectra indicate that iron can be considered as one of the best choices for helping polyphenols in the reduction process. Hence, we used AFM, XPS, Raman spectroscopy and I-V diagram to characterize graphene oxide reduced by polyphenols and iron. In recent years, hydrazine has been recognized as one of the standard reducing agents for effective reduction of graphene oxide. In our analysis, it is found that the conductivity of our reduced... 

Nowadays risk is one the major concepts of personal and social work aspect. For researchers have been working to propose solutions for risk management in different level of projects. Project risk management has been known to be one of the major research areas conjugated with knowledge management solutions. However no proper solution for fulfilling a proper structure of risk management has been found. The main aim of this thesis is to find a well defined structure to enable the risk management concepts in project management. But the definition of such system is known to be so complicated due to vast area of related requirements which can be found for risk management. Moreover this solution... 

Civil structures are on the verge of changing which leads energy dissipation capacity to decline. Structural Health Monitoring (SHM) as a process in order to implement a damage detection strategy and assess the condition of structure plays a key role in structural reliability. Earthquake is a recognized factor in variation of structures condition, inasmuch as inelastic behavior of a building subjected to design level earthquakes is plausible. In this study Hilbert Hunag Transformation (HHT) is superseded by Ensemble Empirical Mode decomposition (EEMD) and Hilbert Transform (HT) together. Albeit this method is closely resemble HHT, EEMD brings more appropriate Intrinsic Mode Functions (IMFs).... 

Right now, the common standard for programming of CNC machines is ISO6983 which is also called G-code. This standard provides very low level information that only contains information about basic measurements and tool movements. Moreover, it splits the CAD/CAM/CNC chain and makes it difficult to gather feedback from shop floor. A global attempt led to development of a new data model for programming CNC machines. STEP-NC standard which is developing based on STEP is aimed to resolve shortages of G-code. The STEP-NC based controllers, can be categorized into three major groups in terms of programming: indirect, interpreted and adaptable. In this project, in order to develop the third category...