Confined platinum nanoparticle in carbon nanotube: structure and oxidation

2015 ◽  
Vol 17 (3) ◽  
pp. 2078-2087 ◽  
Author(s):  
Guang-Feng Wei ◽  
Cheng Shang ◽  
Zhi-Pan Liu
Keyword(s):  
Global Optimization ◽  
Carbon Nanotube ◽  
First Principles ◽  
Optimization Methods ◽  
Catalytic Performance ◽  
Metal Particles ◽  
Platinum Nanoparticle ◽  
Global Optimization Methods ◽  
Structural Versatility

Confined metal particles show unexpected structural versatility, leading to higher stability and better catalytic performance, as predicted from first-principles-based global optimization methods.

Identification of the Optimal Product Configuration and Parameters for Improving Manufacturability

1996 ◽  
Author(s):  
Deyi Xue
Keyword(s):  
Global Optimization ◽  
Optimization Methods ◽  
Product Configuration ◽  
Design System ◽  
Optimization Approach ◽  
Continuous Variables ◽  
Integer Variables ◽  
System A ◽  
Global Optimization Methods

Abstract A global optimization approach for identifying the optimal product configuration and parameters is proposed to improve manufacturability measures including feasibility, cost, and time of production. Different product configurations, including alternative design candidates and production processes, are represented by an AND/OR graph. Product parameters are described by variables including continuous variables, integer variables, Boolean variables, and discrete variables. Two global optimization methods, genetic algorithm and simulated annealing, are employed for identifying the optimal product configuration and parameters. The introduced approach serves as a key component in an integrated concurrent design system. A case study example is given to show how the proposed method is used for solving the engineering problems.

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