Micro/meso scale modification can bring big changes in macroscale *** addition of nanofillers makes materials strong,durable and multifunctional/*** paper aims at studying mechanical property,durability,electrical pro...
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Micro/meso scale modification can bring big changes in macroscale *** addition of nanofillers makes materials strong,durable and multifunctional/*** paper aims at studying mechanical property,durability,electrical property,electromagnetic property and piezoresistivity of concrete with nano silica(NS),carbon nanotube(CNT),botryoid hybrid carbon material(BHCBM),nano graphite
Selecting check index quantitatively is the core of the calibration of micro traffic simulation parameters at signal intersection. Five indexes in the node (intersection) module of VISSIM were selected as the check in...
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Selecting check index quantitatively is the core of the calibration of micro traffic simulation parameters at signal intersection. Five indexes in the node (intersection) module of VISSIM were selected as the check index set. Twelve simulation parameters in the core module were selected as the simulation parameters set. Optimal process of parameter calibration was proposed and model of the intersection of Huangcun west street and Xinghua street in Beijing was built in VISSIM to verify it. The sensitivity analysis between each check index and simulation parameter in their own set was conducted respectively. Sensitive parameter sets of different check indices were obtained and compared. The results show that different indexes have different size of set, and average vehicle delay’s is maximum, so it’s necessary to select index quantitatively. The results can provide references for scientific selection of the check indexes and improve the study efficiency of parameter calibration.
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