Classification and Inverse Design of Metasurface Absorber in Visible Band

The convergence of artificial intelligence and machine learning with material science holds significant promise to rapidly accelerate development timelines of new high-performance polymeric materials. Within this context, we report an inverse design strategy for polycarbonate and polyester discovery based on a recommendation system that proposes polymerization experiments that are likely to produce materials with targeted properties. Following recommendations of the system driven by the historical ring-opening polymerization results, we carried out experiments targeting specific ranges of monomer conversion and dispersity of the polymers obtained from cyclic lactones and carbonates. The results of the experiments were in close agreement with the recommendation targets with few false negatives or positives obtained for each class.<br>

Download Full-text

Choice of Optimum Operational Regime for Total Stations upon Making Geodetic Surveys under Heavy Aerosol Atmosphere Pollution

Geodesy and Cartography ◽

10.22389/0016-7126-2018-938-8-12-19 ◽

2018 ◽

Vol 938 (8) ◽

pp. 12-19

Author(s):

S. B. Verdiyev

Keyword(s):

Rational Choice ◽

Theoretical Modelling ◽

Total Station ◽

Visible Band ◽

Multi Wavelength ◽

Atmosphere Pollution ◽

Experimental Researches ◽

Practical Recommendations

The possibility to use multi-wavelength regime of total stations operation for making surveys under heavy aerosol atmosphere pollution is researched. The actuality of single- and multi-wavelength regimes rational choice under heavy aerosol atmosphere pollution is grounded. The task on researching the matter of operational regime choice for total stations is formulated. The method for solution of the formulated task is suggested. The theoretical modelling and experimental researches are held to formulate the criterion for choice of single- or multi-wavelength regimes. The practical recommendations for such a choice are formulated. The practical recommendations are formulated for choice of measurements regime. According to formulated recommendations if a single-wavelength total station operates in the field of longer wavelengths (R) of visible band and a three-wavelengths one operates with bias to shorter (B, G, R) wavelengths, the single-wavelength total station should be preferred. But if the single-wavelength total station operates in the field of shorter wavelengths (B) and the three-wavelengths one operates with bias to longer wavelengths (B, G, R) then the multi-wavelengths total station should be preferred. The recommendation described in this article are relevant for both the regimes of measurements with- and without reflector and can be useful for users of total stations.

Download Full-text

Inverse design of 3D curved ducts using a 3D-upgraded ball-spine algorithm

Inverse Problems in Science and Engineering ◽

10.1080/17415977.2021.1894143 ◽

2021 ◽

pp. 1-35

Author(s):

Atefeh Kariminia ◽

Mahdi Nili-Ahmadabadi ◽

Kyung Chun Kim

Keyword(s):

Inverse Design ◽

Curved Ducts

Download Full-text

Aerodynamic Inverse Design of Transonic Compressor Cascades with Stabilizing Elastic Surface Algorithm

Applied Sciences ◽

10.3390/app11114845 ◽

2021 ◽

Vol 11 (11) ◽

pp. 4845

Author(s):

Mohammad Hossein Noorsalehi ◽

Mahdi Nili-Ahmadabadi ◽

Seyed Hossein Nasrazadani ◽

Kyung Chun Kim

Keyword(s):

Design Method ◽

Inverse Design ◽

Normal Shock ◽

Compressor Cascade ◽

Elastic Surface ◽

Transonic Compressor ◽

Pressure Distributions ◽

The Difference ◽

Inverse Design Method ◽

Transonic Cascade

The upgraded elastic surface algorithm (UESA) is a physical inverse design method that was recently developed for a compressor cascade with double-circular-arc blades. In this method, the blade walls are modeled as elastic Timoshenko beams that smoothly deform because of the difference between the target and current pressure distributions. Nevertheless, the UESA is completely unstable for a compressor cascade with an intense normal shock, which causes a divergence due to the high pressure difference near the shock and the displacement of shock during the geometry corrections. In this study, the UESA was stabilized for the inverse design of a compressor cascade with normal shock, with no geometrical filtration. In the new version of this method, a distribution for the elastic modulus along the Timoshenko beam was chosen to increase its stiffness near the normal shock and to control the high deformations and oscillations in this region. Furthermore, to prevent surface oscillations, nodes need to be constrained to move perpendicularly to the chord line. With these modifications, the instability and oscillation were removed through the shape modification process. Two design cases were examined to evaluate the method for a transonic cascade with normal shock. The method was also capable of finding a physical pressure distribution that was nearest to the target one.

Download Full-text