Efficient Construction of Canonical Polyadic Approximations of Tensor Networks
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Chemistry↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Accurate and Numerically Efficient r 2 SCAN Meta-Generalized Gradient Approximation
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
Quasicrystals and Their Approximants in a Crystalline?Amorphous Diblock Copolymer
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Mueller, Andreas J.↗
Unifying Weak and Strong Charge Correlations within the Random Phase Approximation: Polyampholytes of Various Sequences
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Rumyantsev, Artem M.↗
Influence of the crystal packing in singlet fission: one step beyond the gas phase approximation
Singlet fission (SF), a multiexciton generation process, has been proposed as an alternative to enhance the performance of solar cells.
36 MATERIALS SCIENCE↗
Machine learning to tame divergent density functional approximations: a new path to consensus materials design principles
Machine learning (ML)-based feature analysis reveals universal design rules regardless of density functional choices. Using the consensus among multiple functionals, we identify robust lead complexes in ML-accelerated chemical discovery.
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
Lyapunov stability of smart inverters using linearized distflow approximation
Fast-acting smart inverters that utilize preset operating conditions to determine real and reactive power injection/consumption can create voltage instabilities (over-voltage, voltage oscillations and more) in an electrical distribution network if set-points are not properly configured. In this work, linear distribution power flow equations and droop-based Volt–Var and Volt–Watt control curves are used to analytically derive a stability criterion using Lyapunov analysis that includes the network operating condition. The methodology is generally applicable for control curves that can be represented as Lipschitz functions. The derived Lipschitz constants account for smart inverter hardware limitations for reactive power generation. A local policy is derived from the stability criterion that allows inverters to adapt their control curves by monitoring only local voltage, thus avoiding centralized control or information sharing with other inverters. The criterion is independent of the internal time-delays of smart inverters. Simulation results for inverters with and without the proposed stabilization technique demonstrate how smart inverters can mitigate voltage oscillations locally and mitigate real and reactive power flow disturbances at the substation under multiple scenarios. The study concludes with illustrations of how the control policy can dampen oscillations caused by solar intermittency and cyberattacks.
42 ENGINEERING↗