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Consistent Strain Energy Functions for Transversely Isotropic and Orthotropic Hyperelastic Materials

Fereidoonnezhad, Behrouz | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42505 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Naghdabadi, Reza; Sohrabpour, Saeed; Arghavani, Jamal
  7. Abstract:
  8. Process Variation is seen as statistical variations in leakage current and delay of transistors in nano-scale technologies. The amount of process variations increase as the size of transistors decrease by technology scaling such that those effects can be seen in frequency of MPSoC (Multi-Processor System-on-Chip) cores and their leakage power deviation. These variations cause the tasks duration and power consumption fluctuate in different processors in an MPSoC instance. Consequently, some chip instances of the same MPSoC may consume more time and power than their considered limitations. Hence considering the process variation is necessary and required for MPSoC optimization at different levels. A traditional approach to compensate for such variations is “worst-case” design, but these methods produce pessimistic results which lead to lower yield. The objective of this research is to improve the MPSoC power (energy) yield by task allocation and configuring each of MPSoC cores for a given task graph’s constraint on performance yield. The MPSoC architecture used in this project is a multi-processor system with the ability to configure each of the processors through a shared connection of the processors. Each configuration of the processor system is determined based on the application requirements and effects of process variation. Configuration selection in this work covers cache configuration and adaptive body bias voltage of each processor core in the MPSoC. We have conducted statistical analysis based on Logic-Based Benders Decomposition. Experimental results show that this method improves the energy yield by 18.62 percent on average compared to the traditional method, where the worst case execution time and power consumption of processor cores are considered.
  9. Keywords:
  10. Large Deformation ; Strain Energy Function ; Constitutive Relations ; Transversely Isotropic ; Orthotropic Materials ; Hyperelasticity

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