Design and optimization methods for scramjet inlets

1995 ◽  
Author(s):  
Isabelle Auneau ◽  
Pascal Garnero ◽  
Philippe Duveau
Keyword(s):  
Optimization Methods ◽  
Design And Optimization

FUZZY BASED DESIGN OPTIMIZATION TO REDUCE THE CROSSTALK IN MICROSTRIP LINES

2004 ◽  
Vol 13 (01) ◽  
pp. 121-136 ◽  
Author(s):  
T. AHMAD ◽  
M. A. HOSSAIN ◽  
A. K. RAY ◽  
Z. GHASSEMLOOY
Keyword(s):  
Fuzzy Logic ◽  
Design Optimization ◽  
High Speed ◽  
Printed Circuit Board ◽  
Optimization Methods ◽  
Circuit Board ◽  
Electrical Parameters ◽  
Design And Optimization ◽  
Printed Circuit ◽  
Microstrip Lines

This paper presents an investigation of the design optimization in microstrip lines to reduce the crosstalk level using Fuzzy Logic. In microstrip lines length and spacing, termination conditions of interconnection and output impedance of gates are the major components that cause crosstalk. In order to design high speed printed circuit board (PCB) with optimum interconnection configuration, it is essential to reduce the crosstalk to its minimum tolerance level. A design methodology is proposed to correlate electrical parameters and physical configuration of lines to the crosstalk phenomena. This design is subsequently optimized using Fuzzy Logic to reduce the level of crosstalk. A set of experiments is carried out to demonstrate the capabilities of the design and optimization methods. The effect of the geometrical configuration of the lines on crosstalk, particularly the spacing, is highlighted.

scholarly journals Current State of Development of Ship Structural Design and Optimization Methods

2020 ◽  
Vol 3 (3) ◽  
pp. 171-187
Author(s):  
Marin Palaversa ◽  
Pero Prebeg ◽  
Jerolin Andrić
Keyword(s):  
Sensitivity Analysis ◽  
Support System ◽  
Structural Design ◽  
State Of The Art ◽  
Optimization Methods ◽  
Offshore Structures ◽  
Engineering Practice ◽  
Design And Optimization ◽  
Current State ◽  
Design Support System

This paper presents state-of-the-art methodologies and methods used in the rationally-based structural design of ships and offshore structures, namely design support system, structural optimization, surrogate modelling and sensitivity analysis. It demonstrates their application in structural design of a platform support vessel. It ends with a list of benefits that a structural designer may expect when the presented methods/methodologies are used. It also shows the obstacles to their full implementation in the engineering practice.

scholarly journals Biomimetic molecular design tools that learn, evolve, and adapt

2017 ◽  
Vol 13 ◽  
pp. 1288-1302 ◽  
Author(s):  
David A Winkler
Keyword(s):  
Molecular Design ◽  
Optimization Methods ◽  
Synthetic Methods ◽  
Biological Processes ◽  
New Developments ◽  
Design And Optimization ◽  
Bioactive Natural Products ◽  
Unit Operations ◽  
S Curve ◽  
Pass Through

A dominant hallmark of living systems is their ability to adapt to changes in the environment by learning and evolving. Nature does this so superbly that intensive research efforts are now attempting to mimic biological processes. Initially this biomimicry involved developing synthetic methods to generate complex bioactive natural products. Recent work is attempting to understand how molecular machines operate so their principles can be copied, and learning how to employ biomimetic evolution and learning methods to solve complex problems in science, medicine and engineering. Automation, robotics, artificial intelligence, and evolutionary algorithms are now converging to generate what might broadly be called in silico-based adaptive evolution of materials. These methods are being applied to organic chemistry to systematize reactions, create synthesis robots to carry out unit operations, and to devise closed loop flow self-optimizing chemical synthesis systems. Most scientific innovations and technologies pass through the well-known “S curve”, with slow beginning, an almost exponential growth in capability, and a stable applications period. Adaptive, evolving, machine learning-based molecular design and optimization methods are approaching the period of very rapid growth and their impact is already being described as potentially disruptive. This paper describes new developments in biomimetic adaptive, evolving, learning computational molecular design methods and their potential impacts in chemistry, engineering, and medicine.

Design and Optimization of Injector Structure in Diesel Engine Based on ISIGHT Platform DOE Methods

2011 ◽  
Vol 335-336 ◽  
pp. 1376-1380
Author(s):  
Xin Ying Wu ◽  
Guang Yao Ouyang ◽  
Yu Xue Li
Keyword(s):  
Design Optimization ◽  
Multidisciplinary Design Optimization ◽  
Optimization Design ◽  
Design Method ◽  
Optimization Methods ◽  
Multidisciplinary Design ◽  
Design And Optimization ◽  
Traditional Design ◽  
Improved Performance

The traditional design method of injector structure cannot meet the demand of farther improved performance,the change of modern environment demand not only the optimization of one performance but also the optimization of various comprehensive performance.iSIGHT is a multidisciplinary design optimization platform that offer a integrated designenvironment and advanced design optimization methods. The optimization design of injector structure based on design of experiment of iSIGHT platform to improve the spray quality of injector is implemented.

Genetic Algorithm Based Product Innovation Design Methods and its Application in Bag Design

2010 ◽  
Vol 34-35 ◽  
pp. 691-695
Author(s):  
Xiao Dong He ◽  
Hai Ying Li ◽  
Jian Wu Wu ◽  
Xiao Jian Liu
Keyword(s):  
Genetic Algorithm ◽  
Product Innovation ◽  
Optimization Methods ◽  
Design And Optimization ◽  
Genetic Manipulations ◽  
System Integrity ◽  
Optimization Control ◽  
Individual Evaluation ◽  
Crossover And Mutation ◽  
Interactive Selection

Based on an interactive genetic algorithm implemented the bags innovation design and optimization, a structure that contains 10 operators system integrity algorithm is built, including individual programs, constraints structure, species maintenance, individual evaluation, selection, restructuring, variation, optimization control, decoding and interactive selection. The bags visualization species have been constructed, and the optimization methods can be realized through crossover and mutation genetic manipulations. The experimental results confirmed the effectiveness.

Research on Inverse Design and Optimization in Germany

1988 ◽  
Vol 41 (6) ◽  
pp. 239-246 ◽  
Author(s):  
Helmut Sobieczky
Keyword(s):  
Aerospace Industry ◽  
Theoretical Models ◽  
Optimization Methods ◽  
Inverse Design ◽  
Computational Tools ◽  
Design And Optimization ◽  
Knowledge Based ◽  
Industry Applications ◽  
Aircraft Aerodynamics ◽  
Operational Methods

This article tries to illustrate efforts to develop and apply design and optimization methods in German universities, research institutes and the aerospace industry. Applications are shown solely in turbomachinery and aircraft aerodynamics. With restriction to aerodynamic problems, it is shown that efforts to improve theoretical models to become knowledge-based computational tools overlap with operational methods based on the designer’s experience but resulting in hardware concepts for next generation aircraft components.

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