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The game algorithm that could improve materials design

The game algorithm that could improve materials design
PR-Inside.com: 2017-08-23 14:20:09
Tsukuba, Japan, Aug 23, 2017 - (ACN Newswire) - Designing advanced materials is a complex process, with many potential combinations for precisely placing atoms within a structure. But now, scientists have developed a new tool that helps determine the ideal placements - thanks to an algorithm that identifies the best moves to win computer games, according to a study recently published in the journal Science and Technology of Advanced Materials.


Scientists who design advanced materials, which have applications in silicon microchips or optical fibers, for example, often struggle to determine how to position atoms within a crystal structure to achieve a targeted function. To improve this process, researchers in Japan developed a new method called Materials Design using Tree Search (MDTS). It identifies the best atomic positions using an algorithm called the Monte Carlo tree search, which has been successfully employed by computer games to determine moves that bring the best possible outcomes.

The team used their method to identify the best way to design silicon-germanium alloy structures, which have either a minimal or maximal ability to conduct heat. Materials with minimal 'thermal conductance' can recover waste heat from industrial processes for use as an energy source. Materials with maximum thermal conductance can draw heat away from computer processing units.

The alloy has a certain number of atomic spaces that can be filled with silicon or germanium. The MDTS algorithm goes through an iterative learning process that computes which of all possible positions is best for placing silicon or germanium in order to achieve the desired degree of thermal conductance.

The team compared their method with another commonly used algorithm for this purpose and found that MDTS was comparable or better in terms of total computational time. Their method also has a "substantial" ability to learn from data.

"MDTS is a practical tool that material scientists can easily deploy in their own problems and has the potential to become a standard choice," the researchers conclude.

Article information:

Thaer Dieb, Shenghong Ju, Kazuki Yoshizoe, Zhufeng Hou, Junichiro Shiomi and Koji Tsuda

"MDTS: automatic complex materials design using Monte Carlo tree search"

Science and Technology of Advanced Materials, 2017; 18:1, 504-527.

dx.doi.org/10.1080/14686996.2017.1344083

For further information please contact:

Koji Tsuda, Graduate School of Frontier Sciences, University of Japan, tsuda@k.u-tokyo.ac.jp

Journal information

Science and Technology of Advanced Materials (STAM), www.tandfonline.com/stam is an international open access journal in materials science. The journal covers a broad spectrum of topics, including synthesis, processing, theoretical analysis and experimental characterization of materials. Emphasis is placed on the interdisciplinary nature of materials science and on issues at the forefront of the field, such as energy and environmental issues, as well as medical and bioengineering applications.

For more information about STAM please contact:

Mikiko Tanifuji, Publishing Director, Science and Technology of Advanced Materials, Tanifuji.Mikiko@nims.go.jp

Press release distributed by ResearchSEA for Science and Technology of Advanced Materials.

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