Now showing items 25-44 of 108

    • Efficient Methods for Manufacturing System Analysis and Design 

      Gershwin, Stanley B.; Maggio, Nicola; Matta, Andrea; Tolio, Tullio; Werner, Loren M. (2002-01)
      The goal of the research described here is to develop tools to assist the rapid analysis and design of manufacturing systems. The methods we describe are based on mathematical models of production systems. We combine earlier ...
    • An Extension to the Tactical Planning Model for a Job Shop: Continuous-Time Control 

      Teo, Chee Chong; Bhatnagar, Rohit; Graves, Stephen C. (2005-01)
      We develop an extension to the tactical planning model (TPM) for a job shop by the third author. The TPM is a discrete-time model in which all transitions occur at the start of each time period. The time period must be ...
    • Facilitating Mechanical Design with Augmented Reality 

      Poh, Y. L.; Nee, Andrew Y. C.; Youcef-Toumi, Kamal; Ong, S. K. (2005-01)
      By enhancing a real scene with computer generated objects, Augmented Reality (AR), has proven itself as a valuable Human-Computer Interface (HCI) in numerous application areas such as medical, military, entertainment and ...
    • Factory Models for Manufacturing Systems Engineering 

      Gershwin, Stanley B. (2003-01)
      We review MIT research in manufacturing systems engineering, and we describe current and possible future research activities in this area. This includes advances in decomposition techniques, optimization, token-based control ...
    • Femtosecond laser processing of crystalline silicon 

      Tran, D. V.; Lam, Yee Cheong; Zheng, H. Y.; Murukeshan, V. M.; Chai, J.C.; e.a. (2005-01)
      This paper reports the surface morphologies and ablation of crystalline silicon wafers irradiated by infra-red 775 nm Ti:sapphire femtosecond laser. The effects of energy fluences (below and above single-pulse modification) ...
    • Femtosecond Pulsed Laser Direct Writing System for Photomask Fabrication 

      Ngoi, Kok Ann Bryan; Venkatakrishnan, K.; Stanley, P.; Lim, L.E.N. (2002-01)
      Photomasks are the backbone of microfabrication industries. Currently they are fabricated by lithographic process, which is very expensive and time consuming since it is a several step process. These issues can be addressed ...
    • Focused ion beam direct fabrication of micro-optical elements: features compared with laser beam and electron beam direct writing 

      Fu, Yongqi; Ngoi, Kok Ann Bryan (2004-01)
      Three types of focused ion beam machine: focused ion beam milling (FIB milling), focused ion beam lithography (FIB lithography), and focused ion beam direct deposition (FIB deposition), are described in detail to compare ...
    • A Framework of Implementation of Collaborative Product Service in Virtual Enterprise 

      Ming, X.G.; Lu, Wen Feng (2003-01)
      To satisfy new market requirements, manufacturing industry has shifted from mass production that takes advantage of the scale of production, to quality management that optimizes the internal enterprise functions, to ...
    • Framework to Manage Customer Enquiries for SMEs 

      Xiong, M.H.; Tor, Shu Beng; Bhatnagar, Rohit; Venkataramanaiah, S. (2003-01)
      For most Smaller Manufacturing Enterprises (SMEs), how to manage customer enquiries at the customer enquiry stage is of great importance to maintain the competitive advantage and secure future customer orders. A lack of ...
    • Fulfillment of Rush Customer Orders under Limited Capacity 

      Xiong, M.H.; Tor, Shu Beng; Khoo, L.P.; Bhatnagar, Rohit (2002-01)
      Customer demand fulfillment is the business process within a company that determines how the customer demand is fulfilled. A rush order is the last minute customer order after the production plan of a company has been ...
    • Functional design of mechanical products based on behavior-driven function-environment-structure modeling framework 

      Zhang, W.Y.; Tor, Shu Beng; Britton, G.A.; Deng, Y.M. (2002-01)
      The relative significance of upstream design activity to downstream design activity is widely recognized, due to its critical role in determining the final product’s functionality. Although there are now some general ...
    • Functional Modeling in Conceptual Die Design 

      Tor, Shu Beng; Britton, G.A.; Zhang, W.Y. (2003-01)
      The use of function has been recognized as an important part of the design process over last two decades, especially at the conceptual design stage, due to its critical role in determining the final product’s functionality. ...
    • Gaussian Distribution Approximation for Localized Effects of Input Parameters 

      Rzepniewski, Adam K.; Hardt, David E. (2003-01)
      In the application of cycle-to-cycle control to manufacturing processes, the model of the process reduces to a gain matrix and a pure delay. For a general multiple input – multiple output process, this matrix shows the ...
    • Generation of Dielectrophoretic Force under Uniform Electric Field 

      Kua, C.H.; Yang, C.; Goh, S.; Isabel, R.; Youcef-Toumi, Kamal; e.a. (2006-01)
      Effective dipole moment method has been widely accepted as the de facto technique in predicting the dielectrophoretic force due to the non-uniform electric field. In this method, a finite-particle is modeled as an equivalent ...
    • A Generic Mechanism for Repairing Job Shop Schedules 

      Raheja, Amritpal Singh; Reddy, K. Rama Bhupal; Subramaniam, Velusamy (2003-01)
      Reactive repair of a disrupted schedule is a better alternative to total rescheduling, as the latter is a time consuming process and also results in shop floor nervousness. The schedule repair heuristics reported in the ...
    • A Hybrid Intelligent System for Stamping Process Planning in Progressive Die Design 

      Zhang, W.Y.; Tor, Shu Beng; Britton, G.A. (2004-01)
      This paper presents an intelligent, hybrid system for stamping process planning in progressive die design. The system combines the flexibility of blackboard architecture with case-based reasoning. The hybrid system has the ...
    • Imaging at the Nano-scale: State of the Art and Advanced Techniques 

      Aumond, Bernardo D.; El Rifai, Osamah M.; Youcef-Toumi, Kamal (2003-01)
      Surface characteristics such as topography and critical dimensions serve as important indicators of product quality and manufacturing process performance especially at the micrometer and the nanometer scales. This paper ...
    • InGaAsN/GaAs Quantum-well Laser Diodes 

      Wang, S.Z.; Yoon, Soon Fatt (2004-01)
      GaAs-based InGaAsN/GaAs quantum well is found to be very sensitive to growth conditions and ex-situ annealing processes. Annealing could drastically increase the optical quality of GaAs-based InGaAsN/GaAs quantum well. As ...
    • Investigation of aspect ratio of hole drilling from micro to nanoscale via focused ion beam fine milling 

      Fu, Yongqi; Ngoi, Kok Ann Bryan (2005-01)
      Holes with different sizes from microscale to nanoscale were directly fabricated by focused ion beam (FIB) milling in this paper. Maximum aspect ratio of the fabricated holes can be 5:1 for the hole with large size with ...
    • A Lab Scale Polymer Micro-Embossing Machine for Process Control Research 

      Ganesan, Bala; Hardt, David E. (2004-01)
      Micro embossing is the process of fabricating micron-sized features by plastic deformation of a work piece by means of a shaped tool or die. In our work we are concerned with hot embossing of PMMA to produce features in ...