A double loop optimization method for gasoline online blending

2016 ◽  
Author(s):  
Weiheng Chen ◽  
Jun Yang
Keyword(s):  
Optimization Method ◽  
Double Loop ◽  
Loop Optimization

Braess paradox and double-loop optimization method to enhance power grid resilience

2021 ◽  
pp. 107913
Author(s):  
Xi Zhang ◽  
Haicheng Tu ◽  
Jianbo Guo ◽  
Shicong Ma ◽  
Zhen Li ◽  
...  
Keyword(s):  
Power Grid ◽  
Optimization Method ◽  
Double Loop ◽  
Braess Paradox ◽  
Loop Optimization

scholarly journals Gait-symmetry-based human-in-the-loop optimization for unilateral transtibial amputees with robotic prostheses

2020 ◽  
Author(s):  
Yanggan Feng ◽  
Chengqiang Mao ◽  
Qining Wang
Keyword(s):  
Metabolic Cost ◽  
Optimization Method ◽  
Metabolic Energy ◽  
Joint Degeneration ◽  
Joint Injury ◽  
Loop Optimization ◽  
Gait Symmetry ◽  
Human In The Loop ◽  
Risk Of Injury ◽  
Transtibial Amputees

AbstractGait asymmetry due to the loss of unilateral limb increases the risk of injury or progressive joint degeneration. The development of wearable robotic devices paves a way to improve gait symmetry of unilateral amputees. Moreover, the state-of-the-art studies on human-in-the-loop optimization strategies through decreasing the metabolic cost as the optimization task, have met several challenges, e.g. too long period of optimization and the optimization feasibility for unilateral amputees who have the deficit of gait symmetry. Here, in this paper, we proposed gait-symmetry-based human-in-the-loop optimization method to decrease the risk of injury or progressive joint degeneration for unilateral transtibial amputees. The experimental results (N = 3 unilateral transtibial subjects) demonstrate that only average 9.0±4.1min of convergence was taken. Compared to gait symmetry while wearing prosthetics, after optimization, the gait symmetry indicator value of the subjects wearing the robotic prostheses was improved by 21.0% and meanwhile the net metabolic energy consumption value was reduced by 9.2%. Also, this paper explores the rationality of gait indicators and what kind of gait indicators are the optimization target. These results suggest that gait-symmetry-based human-in-the-loop strategy could pave a practical way to improve gait symmetry by accompanying the reduction of metabolic cost, and thus to decrease the risk of joint injury for the unilateral amputees.

Reliability-based topology optimization of piezoelectric smart structures with voltage uncertainty

2022 ◽  
pp. 1045389X2110721
Author(s):  
Bo Yang ◽  
Changzheng Cheng ◽  
Xuan Wang ◽  
Zeng Meng ◽  
Abbas Homayouni-Amlashi
Keyword(s):  
Topology Optimization ◽  
Reliability Analysis ◽  
Optimization Method ◽  
Polarization Model ◽  
Loop Optimization ◽  
Design Variables ◽  
Index Approach ◽  
Piezoelectric Structure ◽  
Reliability Constraint ◽  
Piezoelectric Structures

Currently, most of the piezoelectric structures are designed under deterministic conditions, where the influence of uncertain factors on the output motion accuracy is ignored. In this work, a probabilistic reliability-based topology optimization method for piezoelectric structure is proposed to deal with the working voltage uncertainty. A nested double-loop optimization algorithm of minimizing the total volume while satisfying the reliability requirement of the displacement performance is established, where the PEMAP-P (piezoelectric material with penalization and polarization) model is used for parameterization of stiffness matrix, piezoelectric coupling matrix, and polarization direction. This strategy consists of an inner loop for reliability analysis and an outer loop for topology optimization. The reliability index approach based on most probable point (MPP) is used for realizing the evaluation of reliability constraint in reliability analysis. The sensitivities of reliability constraint with respect to the random variables and design variables are detailed using the adjoint variable method. Typical examples are performed to illustrate the effectiveness of the proposed RBTO method. A comparison of the optimization results for different reliability indexes, standard deviations of the voltage, spring stiffnesses, and displacement limits are conducted, as well as the deterministic topology optimization results.

A Pipelining Loop Optimization Method for Dataflow Architecture

2018 ◽  
Vol 33 (1) ◽  
pp. 116-130 ◽  
Author(s):  
Xu Tan ◽  
Xiao-Chun Ye ◽  
Xiao-Wei Shen ◽  
Yuan-Chao Xu ◽  
Da Wang ◽  
...  
Keyword(s):  
Optimization Method ◽  
Loop Optimization ◽  
Dataflow Architecture

scholarly journals Algorithmization of Reliability-Based Optimization

2014 ◽  
Vol 14 (1) ◽  
pp. 81-90 ◽  
Author(s):  
Ondřej Slowik ◽  
Drahomír Novák
Keyword(s):  
Optimization Method ◽  
Double Loop ◽  
Multilevel Sampling ◽  
Reliability Based Optimization ◽  
Different Levels

Abstract The paper presents newly developed university software FNPO designed for reliability-based optimization. The program works with a newly proposed optimization method called Aimed Multilevel Sampling (AMS) in the optimization cycle of reliability-based optimization. For simulation at different levels of the algorithm AMS and reliability calculations program uses cyclic calls of program FReET - so called double-loop approach. The developed software enables to optimize model of general complexity with consideration of deterministic and/or reliability constraints.

Enriched Serial-Loop Optimization Method for Efficient Reliability-Based Electromagnetic Designs

2016 ◽  
Vol 52 (3) ◽  
pp. 1-4 ◽  
Author(s):  
Dong-Wook Kim ◽  
Byungsu Kang ◽  
K. K. Choi ◽  
Dong-Hun Kim
Keyword(s):  
Optimization Method ◽  
Loop Optimization
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