scholarly journals Multi-level evolution strategies for high-resolution black-box control

2021 ◽  
Author(s):  
Ofer M. Shir ◽  
Xi. Xing ◽  
Herschel. Rabitz
Keyword(s):  
High Resolution ◽  
Black Box ◽  
Evolution Strategies ◽  
Multi Level

scholarly journals Mirrored Orthogonal Sampling for Covariance Matrix Adaptation Evolution Strategies

2019 ◽  
Vol 27 (4) ◽  
pp. 699-725 ◽  
Author(s):  
Hao Wang ◽  
Michael Emmerich ◽  
Thomas Bäck
Keyword(s):  
Convergence Rate ◽  
Covariance Matrix ◽  
Sampling Technique ◽  
Black Box ◽  
Evolution Strategies ◽  
High Dimensional ◽  
Major Purpose ◽  
Search Spaces ◽  
Covariance Matrix Adaptation ◽  
Adaptation Evolution

Generating more evenly distributed samples in high dimensional search spaces is the major purpose of the recently proposed mirrored sampling technique for evolution strategies. The diversity of the mutation samples is enlarged and the convergence rate is therefore improved by the mirrored sampling. Motivated by the mirrored sampling technique, this article introduces a new derandomized sampling technique called mirrored orthogonal sampling. The performance of this new technique is both theoretically analyzed and empirically studied on the sphere function. In particular, the mirrored orthogonal sampling technique is applied to the well-known Covariance Matrix Adaptation Evolution Strategy (CMA-ES). The resulting algorithm is experimentally tested on the well-known Black-Box Optimization Benchmark (BBOB). By comparing the results from the benchmark, mirrored orthogonal sampling is found to outperform both the standard CMA-ES and its variant using mirrored sampling.

scholarly journals Institutional Bridging for SME High-Distance Internationalisation to China: A Contextualised Explanation

2019 ◽  
Vol 15 (02) ◽  
pp. 307-340 ◽  
Author(s):  
Carole Couper
Keyword(s):  
Black Box ◽  
Institutional Distance ◽  
Limited Resources ◽  
Chinese Market ◽  
Multi Level ◽  
Institutional Boundaries

ABSTRACTThis article offers a contextualised explanation of the process of institutional bridging by Delta, a British SME, in order to internationalise to China across high institutional distance. The study uncovers three novel mechanisms of ‘Cross-institutional Dissonance Mitigation’, ‘Multi-level Strategic Embedding’, and ‘Cross-institutional Consonance Retuning’ to explain how and why a failing SME with limited resources and networks was able to bridge the institutional distance and internationalise to the challenging Chinese market. This article contributes to the literature on SME internationalisation across high institutional distance by opening the ‘black box’ of SME institutional bridging, hence demonstrating the benefits of contextualised explanations to extend research into internationalisation phenomena that span multiple institutional boundaries.

Digital Approaches to ISI-Mitigation in High-Resolution Oversampled Multi-Level D/A Converters

2011 ◽  
Vol 46 (12) ◽  
pp. 2892-2903 ◽  
Author(s):  
Lars Risbo ◽  
Rahmi Hezar ◽  
Burak Kelleci ◽  
Halil Kiper ◽  
Mounir Fares
Keyword(s):  
High Resolution ◽  
Multi Level
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