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Journal articles on the topic 'Estimation des microstructures'

Author: Grafiati

Published: 1 June 2024

Last updated: 31 July 2025

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1

Amnuaykijvanit, O., S. Anantawaraskul, and T. Rakthanmanon. "Estimation of ethylene/1-butene copolymerization conditions using the autoencoder model." Journal of Physics: Conference Series 2175, no. 1 (2022): 012028. http://dx.doi.org/10.1088/1742-6596/2175/1/012028.

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Abstract Chain microstructures of ethylene/1-butene copolymers produced at specific polymerization conditions can be calculated using the copolymerization kinetic model. However, this kinetic model cannot be solved inversely to estimate polymerization conditions from desired microstructures. In this work, the autoencoder (AE) model, the machine learning techniques based on artificial neural network (ANN) concept, was developed to help estimate polymerization conditions to produce polymers with desired microstructures (e.g., molecular weight distribution (MWD), chemical composition distribution

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Palevicius, Arvydas, and Giedrius Janusas. "Analysis of Periodical Microstructures Using Optical Methods." Advanced Materials Research 433-440 (January 2012): 2021–28. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.2021.

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In this work we present an optical laser based method for characterization of periodical microstructure. It allows indirect evaluation of geometrical and optical parameters of periodical microstructures. Proposed method is applicable for optimization and control of technological processes in the cases when traditional measurement techniques are not suitable. The main experimental results are compared with the computer simulations where the standard programs PCGrate-SX6.0 and and GSolver V4.20b were employed. Error of estimation of geometrical parameters of periodical microstructures by compari

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Blanc, Rémi, Pierre Baylou, Christian Germain, and Jean-Pierre Da Costa. "Confidence Bounds for the Estimation of the Volume Phase Fraction from a Single Image in a Nickel Base Superalloy." Microscopy and Microanalysis 16, no. 3 (2010): 273–81. http://dx.doi.org/10.1017/s1431927610000139.

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AbstractWe propose an image-based framework to evaluate the uncertainty in the estimation of the volume fraction of specific microstructures based on the observation of a single section. These microstructures consist of cubes organized on a cubic mesh, such as monocrystalline nickel base superalloys. The framework is twofold: a model-based stereological analysis allows relating two-dimensional image observations to three-dimensional microstructure features, and a spatial statistical analysis allows computing approximate confidence bounds while assessing the representativeness of the image. The

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Liu, Zaobao, Jianfu Shao, Weiya Xu, and Chong Shi. "Estimation of Elasticity of Porous Rock Based on Mineral Composition and Microstructure." Advances in Materials Science and Engineering 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/512727.

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Estimation of elastic parameters of porous rock like the compressibility of sandstone is scientifically important and yet an open issue. This study illustrates the estimation of the elastic compressibility of sandstone (ECS) based on the assumption that the ECS is determined closely by the mineral composition and microstructures. In this study, 37 samples are collected to evaluate the estimations of the ECS obtained by different methods. The regression analysis is first implemented using the 37 samples. The results show that ECS exhibits linear relations with the rock minerals, pores, and appl

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Ben Ahmed, Amal, Ahmad Bahloul, Mohamed Iben Houria, Anouar Nasr, and Raouf Fathallah. "Multiaxial fatigue life estimation of defective aluminum alloy considering the microstructural heterogeneities effect." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 233, no. 9 (2018): 1830–42. http://dx.doi.org/10.1177/1464420718792024.

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The Al–Si–Mg high-cycle fatigue behavior is mainly affected by the microstructural heterogeneities and the presence of casting defects. This attempt aims to develop an analytical approach based on the evaluation of the highly stressed volume caused by local porosities and defined as the affected area methodology. The proposed approach is able to predict the aluminum alloy fatigue response by considering the effect of microstructure described by the secondary dendrite arm spacing and its correlation with the defect size effect. A representative elementary volume model is implemented to evaluate

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McNelley, Terry R., Keiichiro Oh-ishi, and Alexandre P. Zhilyaev. "Microstructure Evolution and Microstructure-Property Relationships in Friction Stir Processing of NiAl Bronze." Materials Science Forum 539-543 (March 2007): 3745–50. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.3745.

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Friction stir processing (FSP) has been employed for localized modification and control of microstructures in NiAl bronze materials, which are widely utilized for marine components. The thermomechanical cycle of FSP results in homogenization and refinement and the conversion of microstructures from a cast to a wrought condition within stir zones in the material. However, the direct measurement of stir zone temperatures, strains, strain rates and cooling rates is difficult due to steep gradients and transients in these quantities, and this is an impediment in the assessment of FSP-induced micro

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Liu, Lishuai, Peng Wu, Yanxun Xiang, and Fu-Zhen Xuan. "Autonomous characterization of grain size distribution using nonlinear Lamb waves based on deep learning." Journal of the Acoustical Society of America 152, no. 3 (2022): 1913–21. http://dx.doi.org/10.1121/10.0014289.

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Characterization of grain microstructures of metallic materials is crucial to materials science and engineering applications. Unfortunately, the universal electron microscopic methodologies can only capture two-dimensional local observations of the microstructures in a time-consuming destructive way. In this regard, the nonlinear ultrasonic technique shows the potential for efficient and nondestructive microstructure characterization due to its high sensitivity to microstructural features of materials, but is hindered by the ill-posed inverse problem for multiparameter estimation induced by th

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Kawa, Marek. "Failure Criterion for Brick Masonry: A Micro-Mechanics Approach." Studia Geotechnica et Mechanica 36, no. 3 (2015): 37–48. http://dx.doi.org/10.2478/sgem-2014-0025.

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Abstract The paper deals with the formulation of failure criterion for an in-plane loaded masonry. Using micro-mechanics approach the strength estimation for masonry microstructure with constituents obeying the Drucker-Prager criterion is determined numerically. The procedure invokes lower bound analysis: for assumed stress fields constructed within masonry periodic cell critical load is obtained as a solution of constrained optimization problem. The analysis is carried out for many different loading conditions at different orientations of bed joints. The performance of the approach is verifie

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Schouwenaars, Rafael, Víctor H. Jacobo, Sara M. Cerrud, and Armando Ortiz. "Finite Element Simulation of Microstresses in a Traditional FGM: The Case of Soft Tribo-Alloys." Materials Science Forum 492-493 (August 2005): 421–28. http://dx.doi.org/10.4028/www.scientific.net/msf.492-493.421.

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Journal bearings are graded systems with a metal-metal composite as the functional layer. Estimation of the microscale stress distributions is used to analyse the interaction between microstructure, material properties and damage mechanisms during wear. The analysis is executed by means of simple plane-strain finite element models mimicking experimentally observed microstructures. It is found that under realistic macrosstress conditions no tensile microstresses are induced in the triboalloy and that plastic flow is inhibited by the graded structure.

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Yuan, Jianhui, Yu Pan, and Xin Zhang. "Ultrahigh Frequency Data Liquidity Duration Estimation: A Case Study of Chinese A Shares." Mathematical Problems in Engineering 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/371272.

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Liquidity has always been a hot spot for researchers of financial market microstructures. Analysis of liquidity is of great significance for investors and market regulators. Ultrahigh frequency data records the whole dynamic change of the trading process, so it has advantages in depicting the market microstructure. This study analyzes Asian emerging market equities liquidity using ultrahigh frequency data. We used various forms of WACD models and let trading duration be indicators of liquidity. Through the residual test, we were able to select the best model to describe the overall liquidity.

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Do, Huy Quang, Shashank Bishnoi, and Karen Louise Scrivener. "Microstructural modelling of autogenous shrinkage in Portland cement paste at early age." Engineering Computations 37, no. 9 (2020): 3171–86. http://dx.doi.org/10.1108/ec-08-2019-0353.

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Purpose This paper aims to develop a numerical, micromechanical model to predict the evolution of autogenous shrinkage of hydrating cement paste at early age (up to 7 days). Autogeneous shrinkage can be important in high-performance concrete characterized by low water to cement (w/c) ratios. The occurrence of this phenomenon during the first few days of hardening may result in early-age cracking in concrete structures. A good prediction of autogeneous shrinkage is necessary to achieve better understanding of the mechanisms and the deployment of effective measures to prevent early-age cracking.

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Farhangdoost, Khalil, and S. Rahnama. "Developed Random Tessellation for Modeling of Microstructure." Key Engineering Materials 488-489 (September 2011): 529–32. http://dx.doi.org/10.4028/www.scientific.net/kem.488-489.529.

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The concept of random tessellation is extensively used in wide area of natural sciences, especially material sciences. In this paper a simple but complete explanation of the random tessellation and mathematical tools requirements is presented. Then introducing the algorithm and the program for display random tessellation diagram was written. This program, with high speed and simple algorithm for random tessellation has the ability to change the level of statistical parameters such as number, mean, variance of the area of the grain. The ability to model microstructures of metals and grains for

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Tu, Wei-Hsiang, Wen-Chang Chu, Chih-Kung Lee, Pei-Zen Chang, and Yuh-Chung Hu. "Effects of etching holes on complementary metal oxide semiconductor–microelectromechanical systems capacitive structure." Journal of Intelligent Material Systems and Structures 24, no. 3 (2012): 310–17. http://dx.doi.org/10.1177/1045389x12449917.

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Etching the large area of sacrificial layer under the microstructure to be released is a common method used in microelectromechanical systems technology. In order to completely release the microstructures, many etching holes are often required on the microstructure to enable the etchant to completely etch the sacrificial layer. However, the etching holes often alter the electromechanical properties of the micro devices, especially capacitive devices, because the fringe fields induced by the etching holes can significantly alter the electrical properties. This article is aimed at evaluating the

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Mikami, Yoshiki, Masahito Mochizuki, Terumi Nakamura, Kazuo Hiraoka, and Masao Toyoda. "Application of Numerical Simulation Considering the Effect of Phase Transformation to the Estimation of Hardness Distribution in Welds." Materials Science Forum 512 (April 2006): 379–82. http://dx.doi.org/10.4028/www.scientific.net/msf.512.379.

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This study investigated a method for estimating hardness distribution in welds, considering the effect of phase transformation and weld thermal cycles. Hardness distribution in welds was estimated from fractions and hardness of each microstructure by using rule of mixture. Finite element heat conduction analysis was performed to calculate weld thermal cycles. Microstructures formed corresponding to the thermal cycle were also calculated based on the continuous cooling transformation (CCT) diagram. The method mentioned above was applied to welds of Ultra-Narrow Gap welding process, which was de

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Shimansky, Ruslan V., Dmitrij A. Belousov, Victor P. Korolkov, and Roman I. Kuts. "Diffractive Sensor Elements for Registration of Long-Term Instability at Writing of Computer-Generated Holograms." Sensors 21, no. 19 (2021): 6635. http://dx.doi.org/10.3390/s21196635.

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The research and development of methods using of the specialized diffractive microstructure sensors embedded in the pattern of computer-generated holograms (CGH) manufactured on circular and X-Y laser writing systems is discussed. These microstructures consist of two parts: one of which is written before the CGH in the field of future hologram and the second one is written during the long-term writing of the CGH. The shift between the first and second part of the microstructure is the trace of the writing errors and allows one to determine and calculate the error of CGH fabrication along both

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16

Mrzygłód, B., P. Matusiewicz, A. Tchórz, and I. Olejarczyk-Wożeńska. "Quantitative Analysis of Ductile Iron Microstructure – A Comparison of Selected Methods for Assessment." Archives of Foundry Engineering 13, no. 3 (2013): 59–63. http://dx.doi.org/10.2478/afe-2013-0060.

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Abstract Stereological description of dispersed microstructure is not an easy task and remains the subject of continuous research. In its practical aspect, a correct stereological description of this type of structure is essential for the analysis of processes of coagulation and spheroidisation, or for studies of relationships between structure and properties. One of the most frequently used methods for an estimation of the density Nv and size distribution of particles is the Scheil - Schwartz - Saltykov method. In this article, the authors present selected methods for quantitative assessment

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TERAKI, Junichi, Tohru HIRANO, and Kenji WAKASHIMA. "The Estimation of Microstructures in Multiphase Composites by Inverse Analysis." Transactions of the Japan Society of Mechanical Engineers Series A 57, no. 537 (1991): 1222–27. http://dx.doi.org/10.1299/kikaia.57.1222.

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18

JIN, YI, CHENG WANG, SHUNXI LIU, WEIZHE QUAN, and XIAOKUN LIU. "SYSTEMATIC DEFINITION OF COMPLEXITY ASSEMBLY IN FRACTAL POROUS MEDIA." Fractals 28, no. 05 (2020): 2050079. http://dx.doi.org/10.1142/s0218348x20500796.

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Microstructures dominate the physical properties of fractal porous media, which means the clarification of complexity types and their assembly are of fundamental importance for static or dynamic purposes. In this work, we identified fractal porous media to dual-complexity systems composed of stationary and scale-invariant complexities as per fractal topography theory, and proposed an open mathematical framework to characterize complexity assembly in microstructures, realized the original complexity, such as random, multi-phase, and multi-type features by the quartet structure generation set (Q

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19

Heo, Jun-Mu, Seo-Eun Cho, and Seung-Gul Kang. "The Difference in Spectral Power Density in Sleep Electroencephalography According to the Estimation of Total Sleep Time." Chronobiology in Medicine 5, no. 2 (2023): 58–63. http://dx.doi.org/10.33069/cim.2023.0010.

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Objective: The discrepancy between self-reported subjective sleep time and objective sleep time varies from person to person, and the mechanism that can explain this discrepancy is unclear. This study aimed to investigate the difference in the spectral power of sleep electroencephalography (EEG) according to the estimation of total sleep time (TST).Methods: Of the 4,080 participants in the Sleep Heart Health Study, 2,363 participants with complete data from polysomnography, morning sleep survey, and spectral power of sleep EEG were included in the analysis. The participants were classified as

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20

Graziani, Riccardo, Kyle P. Larson, Richard D. Law, Marc-Antoine Vanier, and James R. Thigpen. "A refined approach for quantitative kinematic vorticity number estimation using microstructures." Journal of Structural Geology 153 (December 2021): 104459. http://dx.doi.org/10.1016/j.jsg.2021.104459.

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21

Garcia-Mateo, C., F. G. Caballero, C. Capdevila, and C. Garcia de Andres. "Estimation of dislocation density in bainitic microstructures using high-resolution dilatometry." Scripta Materialia 61, no. 9 (2009): 855–58. http://dx.doi.org/10.1016/j.scriptamat.2009.07.013.

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22

Sobczyk, K. "Morphological complexity of material microstructures: From stochastic models to fracture estimation." Probabilistic Engineering Mechanics 23, no. 4 (2008): 444–55. http://dx.doi.org/10.1016/j.probengmech.2007.10.013.

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23

Kar, Arkamitra, Indrajit Ray, Udaya B. Halabe, Avinash Unnikrishnan, and Ben Dawson-Andoh. "Characterizations and Quantitative Estimation of Alkali-Activated Binder Paste from Microstructures." International Journal of Concrete Structures and Materials 8, no. 3 (2014): 213–28. http://dx.doi.org/10.1007/s40069-014-0069-0.

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Tulubayev, Ye Yu, Yu V. Ponkratov, Yu N. Gordienko, V. S. Bochkov, O. S. Bukina, and K. K. Samarkhanov. "ESTIMATION OF HELIUM AND TRITIUM RELEASE FROM THE Li15.7Pb LEAD-LITHIUM EUTECTIC IN THE SOLID PHASE STATE UNDER IRRADIATION AT THE IVG.1M REACTOR." NNC RK Bulletin, no. 1 (March 30, 2020): 46–52. http://dx.doi.org/10.52676/1729-7885-2020-1-46-52.

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The studies described in this paper are devoted to the study of helium and tritium release formation in the solid phase state of new Li15.7Pb lithium-lead eutectic under irradiation. The paper describes the main properties of the new material and its microstructure. The comparison of microstructures of eutectic Li15.7Pb and Pb17Li is given. Helium and tritium free path length in the near-surface layer of the lead lithium eutectic sample were calculated. The rate of helium and tritium formation in this material during its irradiation at the IVG.1M reactor has been determined. Estimation of heli

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Lu, Guoyang, Zijian He, Pengfei Liu, et al. "Estimation of Hydraulic Properties in Permeable Pavement Subjected to Clogging Simulation." Advances in Civil Engineering 2022 (January 21, 2022): 1–13. http://dx.doi.org/10.1155/2022/5091895.

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Permeable pavements are often affected by pore clogging, which leads to their functional failure and reduced service life. However, the clogging mechanism and its impact on the permeability and complex pore microstructures in pervious pavement remain unclear. The aim of current study is to quantify the clogging behavior in pervious pavement materials and carry out investigations on the development of pore characteristics and permeability. Novel polyurethane-bound pervious mixture (PUPM) was adopted for comparative study in present research with conventional Porous Asphalt (PA). The Aachen Poli

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Wejrzanowski, Tomasz, Wojciech Spychalski, Krzysztof Różniatowski, and Krzysztof Kurzydłowski. "Image Based Analysis of Complex Microstructures of Engineering Materials." International Journal of Applied Mathematics and Computer Science 18, no. 1 (2008): 33–39. http://dx.doi.org/10.2478/v10006-008-0003-1.

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Image Based Analysis of Complex Microstructures of Engineering MaterialsThe paper presents various methods for quantitative description of material structures. The main focus is on direct methods of description based on image analysis. In particular, techniques for the estimation of the size, shape and spatial distribution of structural elements observed by different microscopic techniques are described. The application of these methods for the characterization of the structures of engineering materials is demonstrated on a stainless steel used in petrochemical installations. It is shown that

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Desai, Meghna, and Thilo Rehren. "Estimating carbon content in crucible steel using image analysis." Historical Metallurgy 54, no. 2 (2023): 1–11. http://dx.doi.org/10.54841/hm.664.

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Pre-industrial crucible steel ingots, produced in both Central and South Asia, are an important class of iron-carbon alloys. Their microstructure reflects their formation from a liquid alloy at a carbon content of 1.0–2.5wt%, which is higher than most mild steels but lower than most cast irons. This article introduces a tool to quantify the carbon content of such alloys based on an operator-supervised image analysis which determines the relative proportions of austenite/pearlite and cementite, respectively, from high-contrast back-scatter electron images of unetched samples. Using examples fro

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Acharya, Srijan, Praveen Gupta, Kaushik Chatterjee, and Satyam Suwas. "Microstructure, Texture and Mechanical Properties after Cold Working and Annealing in a Biomedical Ti-Nb-Ta Alloy." Materials Science Forum 941 (December 2018): 2465–70. http://dx.doi.org/10.4028/www.scientific.net/msf.941.2465.

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β titanium alloys, comprising alloying elements such as Nb, Ta, Zr, are considered promising materials for use in orthopedic applications, as the lower elastic modulus of these alloys, reduces the chance of implant failure caused by stress shielding. The mechanical behavior of these alloys depend on the composition as well as the stability of the phases. In the present study, the effect of cold rolling and subsequent annealing on the microstructure, texture and mechanical behavior of a Ti-Nb-Ta-O alloy has been investigated. Structural characterization was done using x-ray diffraction (XRD) an

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Shen, Yiou, Yan Li, and Feng Lv. "Estimation of the Elastic Modulus and Moisture Absorption of Sisal Fibre." Advanced Materials Research 750-752 (August 2013): 204–9. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.204.

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Microstructures of sisal fibres were revealed optically. Statistics on dimensional parameters for sisal fibres were used to establish a geometrical model in order to estimate the elastic modulus and moisture absorption capability of sisal fibres. The single fibre tensile test was conducted on the sisal. The predicted longitudinal modulus and water absorption was in good agreement with experimental results. It was found that the lumen ratio is a significant factor in determine the mechanical properties of the natural fibre.

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Jeulin, Dominique. "Multi Scale Random Models of Complex Microstructures." Materials Science Forum 638-642 (January 2010): 81–86. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.81.

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Many nanocomposite materials are obtained by dispersing a charge in a matrix. Due to the conditions of mixing, the arrangement of the charge usually presents some heterogeneity at different scales. In order to predict the effective properties of such composites (like the dielectric permittivity or the elastic moduli), it is necessary to know the properties of the two components (charge and matrix), and their spatial distribution. To fulfil this project, we developed a general methodology in several steps: the morphology is summarized by multi-scale random models accounting for the heterogeneou

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Koyama, Toshiyuki, and Toru Miyazaki. "An Estimation of the Free Energy of the Microstructures in Aged Alloys." Journal of the Japan Institute of Metals 53, no. 7 (1989): 643–50. http://dx.doi.org/10.2320/jinstmet1952.53.7_643.

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Cao, Furong, Huizhen Guo, Nanpan Guo, Shuting Kong, and Jinrui Liang. "Room-Temperature Strengthening, Portevin-Le Chatelier Effect, High-Temperature Tensile Deformation Behavior, and Constitutive Modeling in a Lightweight Mg-Gd-Al-Zn Alloy." Materials 16, no. 4 (2023): 1639. http://dx.doi.org/10.3390/ma16041639.

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To explore room-temperature strengthening and high-temperature ductility, a lightweight novel Mg-1.85Gd-0.64Al-0.62Zn alloy was fabricated by innovative multidirectional forging and a hot-rolling technique. Microstructures and mechanical properties were studied at room and elevated temperatures with an optical microscope, an X-ray diffractometer, and a tensile tester. An ultimate tensile strength of 260 MPa, yield strength of 171 MPa, and elongation of 20.4% were demonstrated at room temperature. The room-temperature strengthening mechanisms were identified by strengthening the model estimatio

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Макаренко, Константин, Konstantin Makarenko, Дмитрий Илюшкин, and Dmitriy Ilyushkin. "FRACTAL ANALYSIS OF MICROSTRUCTURES IN GRAPHITIZED CAST IRON." Bulletin of Bryansk state technical university 2016, no. 1 (2016): 34–43. http://dx.doi.org/10.12737/18185.

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The dimensionaltopological parameters of a structure such as size, shape, quantity and distribution characterizing a graphite phase in cast iron exert a significant influence upon material properties. But, the definition of these parameters according to the system presented in SARS 3443-87, to the considerable extent, depends upon human factor. The use of results of such an analysis does not allow creating adequate simulators for the estimation of correlation of structure and properties. The widespread introduction of computer analysis methods for the control of material structures dictates ne

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Velilla-Díaz, Wilmer, Luis Ricardo, Argemiro Palencia, and Habib R. Zambrano. "Fracture Toughness Estimation of Single-Crystal Aluminum at Nanoscale." Nanomaterials 11, no. 3 (2021): 680. http://dx.doi.org/10.3390/nano11030680.

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In this publication, molecular dynamics simulations are used to investigate the fracture behavior of single-crystal aluminum. The stress intensity factor is estimated by means of four different methods, the accuracy is assessed for each approach and the fracture toughness is estimated. The proposed methodology is also applied to estimate the fracture toughness for graphene and diamond using published data from other scientific articles. The obtained fracture toughness for the single-crystal aluminum is compared with other nanomaterials that have similar microstructures. Dislocation emission du

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Yoda, Mitsuhiro, and Satoshi Konishi. "Estimation of an open-loop compact adaptive passive noise control system with microstructures." Journal of the Acoustical Society of America 110, no. 1 (2001): 638–41. http://dx.doi.org/10.1121/1.1379077.

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Lee, Young Jung, Byung-Hoon Lee, Gil-Su Kim, Dae-Gun Kim, Deok-Soo Kim, and Young Do Kim. "Evaluation of conductivity in W–Cu composites through the estimation of topological microstructures." Materials Letters 60, no. 16 (2006): 2000–2003. http://dx.doi.org/10.1016/j.matlet.2005.12.113.

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Kim, Se-Yun, Ji-Su Kim, Jae Hun Lee, Jong Hak Kim, and Tong-Seok Han. "Phase Stiffness Estimation of Two-phase Pebax/PBE Membranes Using Reconstructed 3D Microstructures." Multiscale Science and Engineering 2, no. 2-3 (2020): 143–52. http://dx.doi.org/10.1007/s42493-020-00041-6.

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Ohser, Joachim, Claudio Ferrero, Oliver Wirjadi, Alina Kuznetsova, Jochen Düll, and Alexander Rack. "Estimation of the probability of finite percolation in porous microstructures from tomographic images." International Journal of Materials Research 103, no. 2 (2012): 184–91. http://dx.doi.org/10.3139/146.110669.

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Tewari, A., and A. M. Gokhale. "Efficient estimation of number density in opaque material microstructures: the large-area disector." Journal of Microscopy 200, no. 3 (2000): 277–83. http://dx.doi.org/10.1046/j.1365-2818.2000.00759.x.

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Guo, Zixin, Yongfeng Song, Weixin Wang, Xiongbing Li, and Jie Zhang. "Ultrasonic measurement of interface location between two polycrystalline microstructures using maximum-likelihood estimation." NDT & E International 153 (July 2025): 103347. https://doi.org/10.1016/j.ndteint.2025.103347.

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Liu, Wei, Guxin Xu, Wei Fan, Muyun Lyu, and Zhaowang Xia. "Machine-Learning-Based Characterization and Inverse Design of Metamaterials." Materials 17, no. 14 (2024): 3512. http://dx.doi.org/10.3390/ma17143512.

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Metamaterials, characterized by unique structures, exhibit exceptional properties applicable across various domains. Traditional methods like experiments and finite-element methods (FEM) have been extensively utilized to characterize these properties. However, exploring an extensive range of structures using these methods for designing desired structures with excellent properties can be time-intensive. This paper formulates a machine-learning-based approach to expedite predicting effective metamaterial properties, leading to the discovery of microstructures with diverse and outstanding charact

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Gonchar, A. V., M. S. Anosov, and D. A. Ryabov. "Estimation of Structural Degradation of the Heat Affected Zone of the Welded Joint Under Fatigue." Russian Journal of Nondestructive Testing 58, no. 9 (2022): 790–99. http://dx.doi.org/10.1134/s1061830922090066.

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Abstract We consider the features of using modern nondestructive methods for assessing structural degradation in the process of elastic-plastic cyclic loading of normalizing (average grain size 10 μm) and overheating (average grain size 45 μm) zones of the heat affected zone of St3 steel. In this case, the approaches of digital image processing of microstructures, fractal analysis, and ultrasonic and magnetic testing were used. The features of the stages of degradation of the structure under fatigue and the corresponding behavior of the numerical microstructure parameters such as fractal dimen

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Han, Myounghee, Yongjoo Kim, Jang Ryul Park, Benjamin J. Vakoc, Wang-Yuhl Oh, and Sukyoung Ryu. "Retinal Blood Vessel Caliber Estimation for Optical Coherence Tomography Angiography Images Based on 3D Superellipsoid Modeling." International Journal of Image and Graphics 19, no. 02 (2019): 1950011. http://dx.doi.org/10.1142/s0219467819500116.

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Changes of retinal blood vessel calibers may reflect various retinal diseases and even several non-retinal diseases. We propose a new method to estimate retinal vessel calibers from 3D optical coherence tomography angiography (OCTA) images based on 3D modeling using superellipsoids. Taking advantage of 3D visualization of the retinal tissue microstructures in vivo provided by OCTA, our method can detect retinal blood vessels precisely, estimate their calibers reliably, and show the relative flow speed visually.

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Masmoudi, Mohamed, Wahid Kaddouri, Kaouther Bourih, Abdellah Bourih, and Salah Madani. "A Multi-Scale Homogenization Procedure for the Estimation of Young’s Modulus of Porous Materials by a Multi-Void Shape Model." Revue des composites et des matériaux avancés 32, no. 4 (2022): 165–72. http://dx.doi.org/10.18280/rcma.320401.

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Transversal cross-section pores of lotus-type porous materials are generally considered circular; however, they exhibit various pore geometries, which affect their effective properties. The main objective of this work is to develop a generalized model which allows estimating the effective Young’s modulus of multi-void shape porous microstructures by exploiting a relationship developed to evaluate the effective Young’s modulus of porous materials with single-void shape. A procedure based on free software is then proposed to allow the application of the proposed generalized model on real lotus-t

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Chen, Hongsheng, Chongsheng Long, Hongxing Xiao, Tianguo Wei, and Guan Le. "Estimation of the chemical compositions and corresponding microstructures of AgInCd absorber under irradiation condition." Nuclear Engineering and Technology 52, no. 2 (2020): 344–51. http://dx.doi.org/10.1016/j.net.2019.07.021.

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Velichko, A., A. Wiegmann, and F. Mücklich. "Estimation of the effective conductivities of complex cast iron microstructures using FIB-tomographic analysis." Acta Materialia 57, no. 17 (2009): 5023–35. http://dx.doi.org/10.1016/j.actamat.2009.07.004.

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van der Jagt, Thomas, Martina Vittorietti, Karo Sedighiani, Cornelis Bos, and Geurt Jongbloed. "Estimation of 3D grain size distributions from 2D sections in real and simulated microstructures." Computational Materials Science 256 (June 2025): 113949. https://doi.org/10.1016/j.commatsci.2025.113949.

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Ogierman, Witold, and Grzegorz Kokot. "Analysis of Strain Field Heterogeneity at the Microstructure Level and Inverse Identification of Composite Constituents by Means of Digital Image Correlation." Materials 13, no. 2 (2020): 287. http://dx.doi.org/10.3390/ma13020287.

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The present paper is devoted to the theoretical study on the estimation of the full-field strain at the microstructural level of composite materials by means of Digital Image Correlation (DIC). The main aim of the paper is to investigate the influence of speckle size on the accuracy of the strain field measurement at the microscale. The DIC analysis was conducted based on artificial speckle patterns generated numerically and the deformation behavior of the composites was simulated by using the finite element method (FEM). This approach gives the opportunity to compare the results of the DIC in

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Ohser, Joachim, Claudia Redenbach, and Katja Schladitz. "MESH FREE ESTIMATION OF THE STRUCTURE MODEL INDEX." Image Analysis & Stereology 28, no. 3 (2011): 179. http://dx.doi.org/10.5566/ias.v28.p179-185.

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The structure model index (SMI) is a means of subsuming the topology of a homogeneous random closed set under just one number, similar to the isoperimetric shape factors used for compact sets. Originally, the SMI is defined as a function of volume fraction, specific surface area and first derivative of the specific surface area, where the derivative is defined and computed using a surface meshing. The generalised Steiner formula yields however a derivative of the specific surface area that is – up to a constant – the density of the integral of mean curvature. Consequently, an SMI can be define

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Tanaka, M., Y. Kimura, A. Kayama, L. Chouanine, Reiko Kato, and J. Taguchi. "Image Reconstruction and Analysis of Three-Dimensional Fracture Surfaces Based on the Stereo Matching Method." Key Engineering Materials 261-263 (April 2004): 1593–98. http://dx.doi.org/10.4028/www.scientific.net/kem.261-263.1593.

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A computer program of the fractal analysis by the box-counting method was developed for the estimation of the fractal dimension of the three-dimensional fracture surface reconstructed by the stereo matching method. The image reconstruction and fractal analysis were then made on the fracture surfaces of materials created by different mechanisms. There was a correlation between the fractal dimension of the three-dimensional fracture surface and the fractal dimensions evaluated by other methods on ceramics and metals. The effects of microstructures on the fractal dimension were also experimentall

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