Uchicago Argonne, LLC

Subramanian Sankaranarayanan

Mathew J Cherukara

Henry Chan

Badri Narayanan

Troy David Loeffler

Stephen K Gray

Anirudha V Sumant

Diana Berman

Xiao-Min Lin

Liaohai Chen

Kun Wu

Srilok Srinivasan

John T Bahns

A method for active learning using sparse training data can include training a machine learning model using less than ten first training data points to generate a candidate machine learning model. The method can include performing a Monte Carlo process to sample one or more first outputs of the candidate machine learning model. The method can include testing the one or more first outputs to determine if each of the one or more first outputs satisfy a respective convergence condition. The method can include, responsive to at least one first output not satisfying the respective convergence condition, training the candidate machine learning model using at least one second training data point corresponding to the at least one first output. The method can include, responsive to the one or more first outputs each satisfying the respective convergence condition, outputting the candidate machine learning model.

Systems and methods for active learning from sparse training data

A method for optimizing objective functions can include selecting an objective function based at least on a hierarchy, applying parameters to the objective function to generate an output, responsive to the output not satisfying a tolerance condition, assigning a penalty to the set of parameters and evaluating a convergence condition using the set of parameters and the penalty, responsive to the output satisfying the tolerance condition, evaluating an additional objective function using the parameters in an order corresponding to the hierarchy or evaluating the convergence condition responsive to the selected objective function being a final objective function, modifying the set of parameters using a genetic algorithm responsive to the set of parameters not satisfying the convergence condition, and outputting the set of parameters responsive to the set of parameters satisfying the convergence condition.

Systems and methods for hierarchical multi-objective optimization

A system can include one or more processors configured to access at least one parameter of a material, generate a plurality of structures of the material using the at least one parameter, determine a state of each structure of the plurality of structures using the at least one parameter, determine a difference between the state of each structure of the plurality of structures and a ground state value, evaluate a convergence condition responsive to determining the difference between the state of each structure of the plurality of structures and the ground state value, and output at least one structure of the plurality of structures responsive to the convergence condition being satisfied.

Systems and methods for generating phase diagrams for metastable material states

A method for designing new materials for superlubricity comprises developing, on a computational system, a computational supercell comprising x unit cells of a base material, each unit cell comprising y atoms of the base material. The computational system replaces randomly chosen z atoms of the base material with an impurity atom of an impurity material to form a candidate material. The computational system determines volumetric strain of the candidate material. In response to the volumetric strain exceeding a predetermined threshold, the computational system determines that the candidate material has superlubricity. The computational system displays the candidate material to a user if the candidate material has superlubricity.

Systems and methods for designing new materials for superlubricity

A membrane for filtering one or more hydrophobic organic contaminants can include a porous nanostructure that includes one or more of a metal, a metal oxide, and a metal alloy nanostructure component functionalized with one or more amphiphilic ligands.

Nanoscale membrane for removing trace organic contaminants in a fluid and methods of making and using the same

A method of identifying grains in polycrystalline materials, the method including (a) identifying local crystal structure of the polycrystalline material based on neighbor coordination or pattern recognition machine learning, the local crystal structure including grains and grain boundaries, (b) pre-processing the grains and the grain boundaries using image processing techniques, (c) conducting grain identification using unsupervised machine learning; and (d) refining a resolution of the grain boundaries.

Machine learning technique to identify grains in polycrystalline materials samples

The invention provides a simple and inexpensive method to assemble nanomaterials into millimeter lengths. The method can be used to generate optical, sensing, electronic, magnetic and or catalytic materials. Also provided is a substrate comprised of fused nanoparticles. The invention also provides a diode comprised of assembled nanoparticles.

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Naperville, IL, United States of America

Subramanian Sankaranarayanan