Micro manufacture is the production of products whose functional features or at least one dimension are in the order of mu m. The production of micro products differs from the production for conventional products in m...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
Micro manufacture is the production of products whose functional features or at least one dimension are in the order of mu m. The production of micro products differs from the production for conventional products in many ways, not only the size of the products, but also the issues concerning the material properties, tooling, equipment and handling. These differences drive the need for a new design methodology and associated design tools to aid designers to assess their micro product design. This paper describes the development of a Web-Based Collaborative Design Tool (WBCDT) for assessing product design for micro-manufacturing in Masmicro project. The WBCDT supports the knowledge intensive collaboration among the micro-product designers and the discrete organizations through Internet. In the WBCDT, a knowledge model with the classified assessment modules and knowledge representatives is cleated to implement the distributed design and manufacturing assessment. The modules address the assessment on the following issues: geometry features relating to manufacturability, manufacturing process, availability and selection of tool and machine, material and manufacturing cost. The Microsoft C# programming language, *** web technology and Microsoft Access database are used to develop the WBCDT. Users can access the User Interface (UI) of the WBCDT in a specified service server to assess and optimise their product design. Users can also access the knowledge base and Knowledge-Based Decision System (KBDS) which are integrated into the WBCDT. The WBCDT prototype system has been tested with assessment of the micro-products for micro-forming which shows increase of design efficiency in knowledge intensive, web-based collaborative design environment.
Even though it is an attractive strategy, Mass customization (MC) is not feasible in all environments, and when it is it presents many challenges to be dealt with. Although the literature presents many methods for imp...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
Even though it is an attractive strategy, Mass customization (MC) is not feasible in all environments, and when it is it presents many challenges to be dealt with. Although the literature presents many methods for implementing MC, none of these presented a structured way for implementing and evaluating such a strategy as a whole, each concentrated on one department or phase of the supply chain or value chain. Implementing MC as a strategy in a company is made in 3 main steps. The first one is deciding on the desired level of MC. The second is planning for the change induced in the whole enterprise by such a strategy, and finally the last by evaluating the implemented strategy and constantly improving it. We suggest in this paper the use of extended value chain modelling and simulation for the second and third steps of MC implementation.
A new heuristic is proposed as a modification to the clonal selection based algorithm called the CLONALG of Artificial Immune Systems. In the CLONALG algorithm, the objective function values of the antibodies are used...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
A new heuristic is proposed as a modification to the clonal selection based algorithm called the CLONALG of Artificial Immune Systems. In the CLONALG algorithm, the objective function values of the antibodies are used as an index for affinity, selection and mutation. It does not include a specified set of antigens to solve optimization problems. This mere use of objective function values hinders the utilization of the pattern recognition and adaptation ability of the Immune systems principles. Therefore, in the proposed heuristic, a Structural Similarity Index (SSI) is introduced as an additional criterion to facilitate the antibodies in exploiting the solution structures of antigens and clone accordingly. A hypothetical example problem from an automotive industry is solved to illustrate the application of the proposed heuristic and the results are compared with those obtained using the CLONALG algorithm. The comparison revealed that proposed solution methodology has a faster convergence pattern than the original CLONALG algorithm in solving the type of the underlying optimization problem.
The aim of this study was to develop an efficient and realistic numerical model in order to predict the dynamic response of the friction winder system. The absolute nodal coordinate formulation is an ideal approach fo...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
The aim of this study was to develop an efficient and realistic numerical model in order to predict the dynamic response of the friction winder system. The absolute nodal coordinate formulation is an ideal approach for the modelling of friction winder systems. In this study, the rope was modelled as a planar beam element based on an absolute nodal coordinate formulation. The rope element allows the user to control the axial and bending stiffness through the use of two parameters. In this study, the interaction between the rope and the rotating drum is modelled using an elastic approach in which the contact is accounted for by the inclusion of a set of external forces that depend on the penetration between the rope and rotating drum. This made it possible for us to accurately predict the contact forces, including the stick and slip zones between the rope and the drum. Finally, the applicability of the friction winder model was presented and discussed.
In this paper, we apply our novel approaches based on wavelet and multiwavelet transforms in Web information retrieval of Czech language [1, 2, 3]. The influence of wavelet and multiwavelet transforms on feature extra...
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ISBN:
(纸本)9783642106866
In this paper, we apply our novel approaches based on wavelet and multiwavelet transforms in Web information retrieval of Czech language [1, 2, 3]. The influence of wavelet and multiwavelet transforms on feature extraction and information retrieval ability of calibration model and solve problem of selecting optimum wavelet transform for sentence query entered of any language by Internet user was investigated. The empirical results show that performs accurate retrieval of the multiwavelet transform than scalar wavelet transform. The aptitude of multiwavelet transform to represent one language or domain of the multilingual world regardless of type, script, word order, direction of writing and difficult font problems of the language. This work is a step towards multilingual search engine.
Agent based computing is an innovative sub-field of artificial intelligence and computer science, which provides theories for understanding behaviour of distributed, multi-actor systems and provides methods and algori...
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This paper describes a methodology for the design and development of a knowledge management (KM) system for manufacturing enterprises based on enterprise architecture methodologies with real industrial case studies. E...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
This paper describes a methodology for the design and development of a knowledge management (KM) system for manufacturing enterprises based on enterprise architecture methodologies with real industrial case studies. Enterprise Architecture Frameworks (EAF) have been proposed and developed to help enterprises design their information systems based on corporate objectives and user requirements. However, these frameworks have not given sufficient consideration of how to manage enterprise knowledge with the strong needs for better managing knowledge in the new product development process. This project aims to extend the newly developed enterprise architecture frameworks so that not only information, but also enterprise knowledge can be managed. This project focuses on the new product development process, and thus the enterprise in this context is defined as the product development enterprise or organisation. This paper describes the proposed methodology with an industrial investigation including the collaborating company's business process, organizational structure and knowledge user requirements.
This paper presents an innovative gateway technology. A gateway is physically composed of smart objects (SOs) that are logically related to each other according to a shop-floor workflow configuration. Although smart o...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
This paper presents an innovative gateway technology. A gateway is physically composed of smart objects (SOs) that are logically related to each other according to a shop-floor workflow configuration. Although smart objects are equipped with heterogeneous RFID devices, they are converted into standard web services using the concept of agents. The resulted agent-based smart objects (ASOs) are then centrally managed through a specially purposed Universal Description, Discovery and Integration registry (soUDDI) where facilities such as register, publish, find, bind and invoke are provided for ASOs. Through these facilities, smart objects can be deployed at a gateway in a "plug and play" fashion. Real-time data are collected by smart objects from the shop floor and processed by the corresponding gateway for further application in enterprise information systems (EISs). The proposed framework is demonstrated through a smart forklift gateway around which smart objects are deployed.
Applications that operate in highly dynamic environments must deal with real-time changes of circumstances in order to be consistent and coherent. In this work, we propose an extended deliberation cycle for BDI-modell...
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ISBN:
(纸本)9783642123832
Applications that operate in highly dynamic environments must deal with real-time changes of circumstances in order to be consistent and coherent. In this work, we propose an extended deliberation cycle for BDI-modelled agents that takes advantage of environmental events to coordinate the deliberation process. Our argument is that is it possible to optimise the deliberation performance by exploiting features of windows of opportunity. The proposed model let us define precisely the expected application behaviour that promotes the balance between reactive and proactive applications, leading to solutions with improved computational performance.
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