17 research outputs found
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EcoBlock: Grid Impacts, Scaling, and Resilience
Widespread deployment of EcoBlocks has the potential to transform today's electricity system into one that is more resilient, flexible, efficient and sustainable. In this vision, the system will consist of self- su cient, renewable-powered, block-scale entities that can deliberately adjust their net power exchange and can optimize performance, maintain stability, support each other, or disconnect entirely from the grid as needed. This report is intended as an independent analysis of the potential relationships, both constructive and adverse, between EcoBlocks and the grid
Junta Distance Approximation with Sub-Exponential Queries
Leveraging tools of De, Mossel, and Neeman [FOCS, 2019], we show two
different results pertaining to the \emph{tolerant testing} of juntas. Given
black-box access to a Boolean function , we give a
query algorithm that distinguishes between
functions that are -close to -juntas and -far
from -juntas, where .
In the non-relaxed setting, we extend our ideas to give a
(adaptive) query algorithm that
distinguishes between functions that are -close to -juntas and
-far from -juntas. To the best of our knowledge, this
is the first subexponential-in- query algorithm for approximating the
distance of to being a -junta (previous results of Blais, Canonne, Eden,
Levi, and Ron [SODA, 2018] and De, Mossel, and Neeman [FOCS, 2019] required
exponentially many queries in ).
Our techniques are Fourier analytical and make use of the notion of
"normalized influences" that was introduced by Talagrand [AoP, 1994].Comment: To appear in CCC 202
Kirigami-inspired, highly stretchable micro-supercapacitor patches fabricated by laser conversion and cutting.
The recent developments in material sciences and rational structural designs have advanced the field of compliant and deformable electronics systems. However, many of these systems are limited in either overall stretchability or areal coverage of functional components. Here, we design a construct inspired by Kirigami for highly deformable micro-supercapacitor patches with high areal coverages of electrode and electrolyte materials. These patches can be fabricated in simple and efficient steps by laser-assisted graphitic conversion and cutting. Because the Kirigami cuts significantly increase structural compliance, segments in the patches can buckle, rotate, bend and twist to accommodate large overall deformations with only a small strain (<3%) in active electrode areas. Electrochemical testing results have proved that electrical and electrochemical performances are preserved under large deformation, with less than 2% change in capacitance when the patch is elongated to 382.5% of its initial length. The high design flexibility can enable various types of electrical connections among an array of supercapacitors residing in one patch, by using different Kirigami designs
Recommended from our members
EcoBlock: Grid Impacts, Scaling, and Resilience
Widespread deployment of EcoBlocks has the potential to transform today's electricity system into one that is more resilient, flexible, efficient and sustainable. In this vision, the system will consist of self- su cient, renewable-powered, block-scale entities that can deliberately adjust their net power exchange and can optimize performance, maintain stability, support each other, or disconnect entirely from the grid as needed. This report is intended as an independent analysis of the potential relationships, both constructive and adverse, between EcoBlocks and the grid
Recommended from our members
Kirigami-inspired, highly stretchable micro-supercapacitor patches fabricated by laser conversion and cutting.
The recent developments in material sciences and rational structural designs have advanced the field of compliant and deformable electronics systems. However, many of these systems are limited in either overall stretchability or areal coverage of functional components. Here, we design a construct inspired by Kirigami for highly deformable micro-supercapacitor patches with high areal coverages of electrode and electrolyte materials. These patches can be fabricated in simple and efficient steps by laser-assisted graphitic conversion and cutting. Because the Kirigami cuts significantly increase structural compliance, segments in the patches can buckle, rotate, bend and twist to accommodate large overall deformations with only a small strain (<3%) in active electrode areas. Electrochemical testing results have proved that electrical and electrochemical performances are preserved under large deformation, with less than 2% change in capacitance when the patch is elongated to 382.5% of its initial length. The high design flexibility can enable various types of electrical connections among an array of supercapacitors residing in one patch, by using different Kirigami designs