DEEVO evolves better LLM prompts by debating outputs and selecting survivors with Elo ratings, without requiring labeled data or a hand-written fitness function.
High-temperature stability of ambient-cured one-part alkali-activated materials incorporating graphene for thermal energy storage
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abstract
In this research, the ambient cured one part alkali activated material (AAM) containing graphene nanoplatelets (GNPs), fly ash, slag and silica fume has been investigated after high temperature exposure to 200 to 800oC. Their compressive strength, thermal properties, microstructure, pore structure were characterised through visual observation, isothermal calorimetry, TGA, XRD, SEM-EDS and X-ray CT. The research findings indicated high strength characteristics of the developed AAM (80 MPa) at ambient condition, which could further reach to approx. 100 MPa after being heated up to 400oC. GNPs provided nucleation effects for promoting geopolymerisation and crystallisation. As observed from X-ray CT, a high extent of severe cracks initiated from the core and propagated towards the surface. From SEM-EDS analysis, high Na-Al and Na-Si ratios or low Si-Al and Ca-Si ratios highly correlated to thermal stability. Overall, the research outcomes implied the promising use of the nano-engineered AAMs for thermal energy storage (TES) at 400 to 600oC.
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Tournament of Prompts: Evolving LLM Instructions Through Structured Debates and Elo Ratings
DEEVO evolves better LLM prompts by debating outputs and selecting survivors with Elo ratings, without requiring labeled data or a hand-written fitness function.