Essays in Honor of M. Hashem Pesaran: Prediction and Macro Modeling

The V-shaped electro-thermal MEMS actuator model, with the human error factor taken into account, is presented in this paper through the cascading ANSYS simulation model and the Fuzzy mathematics calculation model. The Fuzzy mathematics calculation model introduces the human error factor into the MEMS actuator model by using the BP neural network, which effectively reduces the error between ANSYS simulation results and experimental results to less than 1%. Meanwhile, the V-shaped electro-thermal MEMS actuator model, with the human error factor included, will become more accurate as the database of the V-shaped electro-thermal actuator model grows.

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Macro modeling and analysis of traffic flow with road width

Journal of Central South University ◽

10.1007/s11771-011-0899-8 ◽

2011 ◽

Vol 18 (5) ◽

pp. 1757-1764 ◽

Cited By ~ 15

Author(s):

Tie-qiao Tang ◽

Chuan-yao Li ◽

Hai-jun Huang ◽

Hua-yan Shang

Keyword(s):

Traffic Flow ◽

Modeling And Analysis ◽

Macro Modeling ◽

Road Width

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A Tunable Macro-Modeling Method for Signal Transition in mm-Wave Flip-Chip Technology

2021 IEEE 25th Workshop on Signal and Power Integrity (SPI) ◽

10.1109/spi52361.2021.9505233 ◽

2021 ◽

Author(s):

Pouya Namaki ◽

Nasser Masoumi ◽

Mohammad-Reza Nezhad-Ahmadi ◽

Safieddin Safavi-Naeini

Keyword(s):

Flip Chip ◽

Modeling Method ◽

Macro Modeling ◽

Chip Technology

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Macro Modeling of Reactive Infiltration Using Level Set Finite Element Formulations

10.1115/imece2000-1239 ◽

2000 ◽

Author(s):

Dinesh Balagangadhar ◽

Gopalaswamy Rajesh

Keyword(s):

Finite Element ◽

Porous Medium ◽

Level Set ◽

Transfer Problem ◽

Ceramic Matrix Composites ◽

Element Formulation ◽

Reactive Infiltration ◽

Macro Modeling ◽

Infiltration Front ◽

Finite Element Formulations

Abstract The process of reactive melt infiltration can be used to fabricate ceramics and ceramic matrix composites. This process involves a liquid metal being allowed to infiltrate a medium with which the liquid reacts to form a resultant ‘matrix’ along with the already present reinforcing fibers. The authors’ previous work on this area revealed that the transient porosity and permeability of a porous medium can be determined for certain geometries from the reaction kinetics and coupled heat and mass transfer problem occurring at the pore level. But the formulation at the macro level, which is essential to optimize the process, has been limited. Towards this end, this paper solves the macro reactive flow problem in a porous medium analytically as well as numerically. The focus of this article will be on the solutions for the advance (displacement) of the ‘infiltration front’ with progressive chemical reaction occurring between the medium and the infiltrant. A finite element formulation is used to solve the problem computationally; a level set formulation is used to track the infiltration front during the process. Excellent agreement is obtained between the analytical and computational solutions thereby validating the level set finite element formulations.

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