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Journal articles on the topic 'Material inhomogenity detection'

Author: Grafiati

Published: 6 September 2023

Last updated: 31 July 2025

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1

Kopchak, Andrii, Anna Romanova, and Oleksandr Mykhailenko. "Detection of Titanium Particles in Soft Tissues Adjacent to the Fixators in Patients with Facial Fractures and Bone Defects." Journal of Diagnostics and Treatment of Oral and Maxillofacial Pathology 2, no. 1 (2018): 25–42. http://dx.doi.org/10.23999/j.dtomp.2018.1.9.

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Background: Open reposition and rigid internal fixation are the main methods of treatment for traumatic injuries of the facial skull and an important stage of bone-plastic, reconstructive, and orthognathic surgery. In contemporary maxillofacial surgery, fixators, implants, and endoprostheses made of titanium or its alloys are widely used due to the high corrosion resistance and biocompatibility. However, recent studies have shown that none of the metal implants used in maxillofacial surgery, orthopedics or traumatology is completely inert. Moreover, they always interact with the surrounding bi

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Alonso Ruiz, Patricia, and Evgeny Spodarev. "Entropy-based Inhomogeneity Detection in Fiber Materials." Methodology and Computing in Applied Probability 20, no. 4 (2017): 1223–39. http://dx.doi.org/10.1007/s11009-017-9603-2.

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3

Xin, Hang, Jingyun Zhang, Cuihong Yang, and Yunyun Chen. "Direct Detection of Inhomogeneity in CVD-Grown 2D TMD Materials via K-Means Clustering Raman Analysis." Nanomaterials 12, no. 3 (2022): 414. http://dx.doi.org/10.3390/nano12030414.

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It is known that complex growth environments often induce inhomogeneity in two-dimensional (2D) materials and significantly restrict their applications. In this paper, we proposed an efficient method to analyze the inhomogeneity of 2D materials by combination of Raman spectroscopy and unsupervised k-means clustering analysis. Taking advantage of k-means analysis, it can provide not only the characteristic Raman spectrum for each cluster but also the cluster spatial maps. It has been demonstrated that inhomogeneities and their spatial distributions are simultaneously revealed in all CVD-grown M

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Netzelmann, U., J. Pelzl, D. Fournier, and A. C. Boccara. "Nondestructive evaluation of magnetic materials by ferromagnetic-resonance photothermal-deflection spectroscopy." Canadian Journal of Physics 64, no. 9 (1986): 1307–10. http://dx.doi.org/10.1139/p86-228.

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Detection of ferromagnetic resonance (FMR) by photothermal beam deflection has been used to study the spatial inhomogeneity of magnetic properties. The technique has been applied to measure the depth dependence of FMR in layered recorder tapes and to determine the lateral variation of the demagnetizing field in metal–glass ribbons.

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Xia, Yuxiu, Yifeng Zhang, Feng Xue, Jiansheng Jiang, and Jiaqi Gao. "Research on Phased Array Ultrasonic Imaging Method Based on Time Reversal Theory." Journal of Physics: Conference Series 2822, no. 1 (2024): 012093. http://dx.doi.org/10.1088/1742-6596/2822/1/012093.

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Abstract With the wide application of additive manufacturing components and composite materials, it is of great significance to detect defects with non-destructive testing methods in the material manufacturing process and in service. Due to the strong attenuation and inhomogeneity characteristics, it is inefficient and poor imaging results to detect its internal defects by conventional ultrasonic testing methods. To improve the detection accuracy, this paper proposes an improved imaging algorithm with time reversal-total focusing method (TR-TFM) imaging technology to improve the defects detect

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Chady, Tomasz, and Ryszard Łukaszuk. "Examining Ferromagnetic Materials Subjected to a Static Stress Load Using the Magnetic Method." Materials 14, no. 13 (2021): 3455. http://dx.doi.org/10.3390/ma14133455.

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This paper discusses the experimental examination of anisotropic steel-made samples subjected to a static stress load. A nondestructive testing (NDT) measurement system with a transducer, which enables observation of local hysteresis loops and detection of samples’ inhomogeneity, is proposed. Local hysteresis loops are measured on two perpendicular axes, including one parallel to the rolling direction of the samples. The results confirm that the selected features of the local hysteresis loops provide important information about the conditions of ferromagnetic materials. Furthermore, it is show

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Zhukovsky, V., A. Gokhman, M. Zavoloka, and I. Grynyova. "THERMAL DEFORMATION WAVES IN HETEROGENEOUS MATERIALS." Journal of Engineering Science XXV (4) (December 25, 2018): 35–38. https://doi.org/10.5281/zenodo.2576733.

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In the paper, a stress-strain detection method is used by correlation point interferometry, in which the resolution of the recording surface changes has been significantly (ten times) improved. This result was obtained by applying a different image-processing algorithm, which allows the recording of 3D surface changes in on-line mode. The deformation wave that occurs during heating propagates through the entire sample and interacts with the interfaces. The inhomogeneity and residual deformations of a material lead to a distortion of the front. The speckle electron interferometry (ESI) method a

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Xiao, Ling, Zhuguan Liang, Yawen Li, et al. "In SEM a New Method of Internal Micrographic Visualization of Semiconductor Materials and IC by Crossing the Surface." Microscopy and Microanalysis 7, S2 (2001): 484–85. http://dx.doi.org/10.1017/s143192760002849x.

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In the paper, we firstly publish a new method of internal micrographic visualization of semiconductor and IC. The quality and reliability of the semiconductor materials (SM) and the integrated circuits (IC) have always been concerned Having a high resolution, high reliable and nondestructive detection method is the key element for their improvements.Silicon oxide layers are used to provide the electrical insulation in the multi-structured ICs. The IC device surfaces are often protected by silicon oxide and silicon nitride layers. Therefore, these insulation layers also cover any inhomogeneity

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Rolland, J. P., and H. H. Barrett. "Effect of random background inhomogeneity on observer detection performance." Journal of the Optical Society of America A 9, no. 5 (1992): 649. http://dx.doi.org/10.1364/josaa.9.000649.

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10

Chandra, Vedant, Hsiang-Chih Hwang, Nadia L. Zakamska, et al. "The SN Ia runaway LP 398-9: detection of circumstellar material and surface rotation." Monthly Notices of the Royal Astronomical Society 512, no. 4 (2022): 6122–33. http://dx.doi.org/10.1093/mnras/stac883.

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ABSTRACT A promising progenitor scenario for Type Ia supernovae (SNeIa) is the thermonuclear detonation of a white dwarf in a close binary system with another white dwarf. After the primary star explodes, the surviving donor can be spontaneously released as a hypervelocity runaway. One such runaway donor candidate is LP 398-9, whose orbital trajectory traces back ≈105 yr to a known supernova remnant. Here, we report the discovery of carbon-rich circumstellar material around LP 398-9, revealed by a strong infrared excess and analysed with follow-up spectroscopy. The circumstellar material is mo

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Garshelis, Ivan J., and Guillaume Crevecoeur. "Nondestructive Detection of Inhomogeneity in the Magnetic Properties of Materials With a Moving Magnet Hysteresis Comparator." IEEE Transactions on Magnetics 48, no. 11 (2012): 4409–12. http://dx.doi.org/10.1109/tmag.2012.2201458.

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12

Chen, Kai, Libing Bai, Yifan Chen, Yuhua Cheng, Shulin Tian, and Peipei Zhu. "Defect Automatic Identification of Eddy Current Pulsed Thermography." Journal of Sensors 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/326316.

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Eddy current pulsed thermography (ECPT) is an effective nondestructive testing and evaluation (NDT&E) technique, and has been applied for a wide range of conductive materials. Manual selected frames have been used for defects detection and quantification. Defects are indicated by high/low temperature in the frames. However, the variation of surface emissivity sometimes introduces illusory temperature inhomogeneity and results in false alarm. To improve the probability of detection, this paper proposes a two-heat balance states-based method which can restrain the influence of the emissivity

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Demirli, Ramazan, Moeness G. Amin, Xizhong Shen, and Yimin D. Zhang. "Ultrasonic Flaw Detection and Imaging through Reverberant Layers via Subspace Analysis and Projection." Advances in Acoustics and Vibration 2012 (July 18, 2012): 1–10. http://dx.doi.org/10.1155/2012/957379.

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Ultrasonic flaw detection and imaging through reverberant layers are challenging problems owing to the layer-induced reverberations and front surface reflections. These undesired signals present a strong clutter and mask the flaw echoes. In this paper, a subspace-based approach is developed for removing, or significantly reducing, the unwanted reverberations, enabling proper flaw detection and imaging. The technique utilizes a set of independent clutter-only reference measurements of the material through the layer. If these measurements are not available, array measurements of the material wit

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Da, Wei, Peng-wei Wang, Yi-fu Wang, Ming-fei Li, and Liang Yang. "Inhomogeneity of Free Volumes in Metallic Glasses under Tension." Materials 12, no. 1 (2018): 98. http://dx.doi.org/10.3390/ma12010098.

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In this work, the deformation of Zr2Cu metallic glass (MG) under uniaxial tensile stress was investigated at the atomic level using a series of synchrotron radiation techniques combined with molecular dynamics simulation. A new approach to the quantitative detection of free volumes in MGs was designed and it was found that free volumes increase in the elastic stage, slowly expand in the yield stage, and finally reach saturation in the plastic stage. In addition, in different regions of the MG model, free volumes exhibited inhomogeneity under stress, in terms of size, density, and distribution.

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Richter, D., R. Pintaske, K. Dornich, and M. Krbetscheck. "novel beta source design for uniform irradiation in dosimetric applications." Ancient TL 30, no. 2 (2012): 57–64. https://doi.org/10.26034/la.atl.2012.464.

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A novel beta radiation source, specifically developed for the lexsyg luminescence system, was studied by radiochromic film. A circular arrangement of miniaturized sources creates a homogeneous radiation field, with a variation of 2% of radiation dose across the central 8 mm diameter of the target irradiated. While this arrangement is very efficient to achieve homogeneous irradiation, it also allows the simultaneous luminescence detection of radiofluorescence through the hole in the source body. The geometry of the irradiation set-up, in particular the material, the size and the shape of the su

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Ying-Heng Yeo and Kin-Sam Yen. "Impurities Detection in Intensity Inhomogeneous Edible Bird’s Nest (EBN) Using a U-Net Deep Learning Model." International Journal of Engineering and Technology Innovation 11, no. 2 (2021): 135–45. http://dx.doi.org/10.46604/ijeti.2021.6891.

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As an important export, cleanliness control on edible bird’s nest (EBN) is paramount. Automatic impurities detection is in urgent need to replace manual practices. However, effective impurities detection algorithm is yet to be developed due to the unresolved inhomogeneous optical properties of EBN. The objective of this work is to develop a novel U-net based algorithm for accurate impurities detection. The algorithm leveraged the convolution mechanisms of U-net for precise and localized features extraction. Output probability tensors were then generated from the deconvolution layers for impuri

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Prager, Jens, Christian Höhne, and Mehbub Ur Rahman. "Synthetic Aperture Focusing Technique for Detecting Transverse Cracks in Austenitic and Dissimilar Welds." Key Engineering Materials 569-570 (July 2013): 1036–43. http://dx.doi.org/10.4028/www.scientific.net/kem.569-570.1036.

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The inspection of austenitic and dissimilar welds using ultrasound demands for sophisticated testing techniques. The application of reconstruction methods like the Synthetic Aperture Focusing Technique (SAFT) on the measurement results provides an appropriate approach for defect characterization and sizing. Nevertheless, the reconstruction algorithm has to consider the aniso-tropic wave propagation inside the inhomogeneous weld material. In recent years the detection of transverse cracks has become increasingly important for ensuring the structural integrity of pipes in the primary circuit of

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Zhao, Yan, Franz B. Spingler, Yatish Patel, Gregory J. Offer, and Andreas Jossen. "Localized Swelling Inhomogeneity Detection in Lithium Ion Cells Using Multi-Dimensional Laser Scanning." Journal of The Electrochemical Society 166, no. 2 (2019): A27—A34. http://dx.doi.org/10.1149/2.0011902jes.

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19

Tan, Ryan, Jessica Charest, Bogdan Dryzhakov, et al. "Characterization of solution grown 3D polycrystalline methylammonium lead tribromide for x-ray detection." Journal of Applied Physics 132, no. 20 (2022): 204503. http://dx.doi.org/10.1063/5.0100362.

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Solution grown metal halide perovskites (MHPs) are a class of low-cost, direct conversion semiconducting materials with the potential to meet the need for large areas, high stopping power, and high sensitivity x-ray detectors. While polycrystalline MHP thin films have shown significant potential for meeting this need, their efficiencies for detecting x rays are limited by their thickness. This article presents an MHP variant, methylammonium lead tribromide (MAPB) in the form of 3D polycrystalline mosaic wafers with relatively high hole transport properties that demonstrated stable sensitivity

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Yang, Gongpeng, Zhenggan Zhou, Yang Li, and Wenbin Zhou. "Phase coherence factor-based ultrasonic annular array testing method for coarse-grained materials." Journal of Physics: Conference Series 2770, no. 1 (2024): 012007. http://dx.doi.org/10.1088/1742-6596/2770/1/012007.

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Abstract Metal materials with coarse-grained structures have the characteristics of coarse grain, acoustic anisotropy, and structural inhomogeneity. When the ultrasonic wave propagates in its interior, the above characteristics will cause strong waveform distortion, acoustic energy attenuation, and structural-acoustic scattering, resulting in a poor signal-to-noise ratio of the ultrasonic echo signal. The annular array ultrasonic transducer has a three-dimensional axisymmetric acoustic field, which is less affected by the grain structure than the linear array ultrasonic transducer. It can real

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Teti, Roberto, Tiziana Segreto, Alessandra Caggiano, and Luigi Nele. "Smart Multi-Sensor Monitoring in Drilling of CFRP/CFRP Composite Material Stacks for Aerospace Assembly Applications." Applied Sciences 10, no. 3 (2020): 758. http://dx.doi.org/10.3390/app10030758.

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Composite material parts are typically laid out in near-net-shape, i.e., very close to the finished product configuration. However, further machining processes are often required to meet dimensional and tolerance requirements. Drilling, edge trimming and slotting are the main cutting processes employed for carbon fiber-reinforced plastic (CFRP) composite materials. In particular, drilling stands out as the most widespread machining process of CFRP composite parts, chiefly in the aerospace industrial sector, due to the extensive use of mechanical joints, such as rivets, rather than welded or bo

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Zheng, Jia, Chuan Tang, Yuanxi Sun, Mingchi Feng, and Congzhe Wang. "An Enhanced U-Net Approach for Segmentation of Aeroengine Hollow Turbine Blade." Mathematics 10, no. 22 (2022): 4230. http://dx.doi.org/10.3390/math10224230.

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The hollow turbine blade plays an important role in the propulsion of the aeroengine. However, due to its complex hollow structure and nickel-based superalloys material property, only industrial computed tomography (ICT) could realize its nondestructive detection with sufficient intuitiveness. The ICT detection precision mainly depends on the segmentation accuracy of target ICT images. However, because the hollow turbine blade is made of special superalloys and contains many small unique structures such as film cooling holes, exhaust edges, etc., the ICT image quality of the hollow turbine bla

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Kopnov, Gregory, Sudhansu Sekhar Das, and Alexander Gerber. "Effect of Fractal Topology on the Resistivity Response of Thin Film Sensors." Sensors 23, no. 5 (2023): 2409. http://dx.doi.org/10.3390/s23052409.

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We discuss the effect of topological inhomogeneity of very thin metallic conductometric sensors on their response to external stimuli, such as pressure, intercalation, or gas absorption, that modify the material’s bulk conductivity. The classical percolation model was extended to the case in which several independent scattering mechanisms contribute to resistivity. The magnitude of each scattering term was predicted to grow with the total resistivity and diverge at the percolation threshold. We tested the model experimentally using thin films of hydrogenated palladium and CoPd alloys where abs

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Chen, Yulei, Tongtong Li, Guoqiang Chai, et al. "Enhancing Spin-Based Sensor Sensitivity by Avoiding Microwave Field Inhomogeneity of NV Defect Ensemble." Nanomaterials 12, no. 22 (2022): 3938. http://dx.doi.org/10.3390/nano12223938.

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The behavior of the magnetic field sensitivity of nitrogen-vacancy (NV) centers as a function of microwave power and the inhomogeneous distribution of MW fields was systematically studied. An optimal structure for exciting spin structures by MW signals was designed using two parallel loop antennas. The volume of the homogeneous regions was approximately 42 mm3, and the associated diameter of the diamond reached up to 5.2 mm with 1016 NV sensors. Based on this structure, the detection contrast and voltage fluctuation of an optically detected magnetic resonance (ODMR) signal were optimized, and

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Grasso, Marco. "In Situ Monitoring of Powder Bed Fusion Homogeneity in Electron Beam Melting." Materials 14, no. 22 (2021): 7015. http://dx.doi.org/10.3390/ma14227015.

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Increasing attention has been devoted in recent years to in situ sensing and monitoring of the electron beam melting process, ranging from seminal methods based on infrared imaging to novel methods based on backscattered electron detection. However, the range of available in situ monitoring capabilities and solutions is still quite limited compared to the wide number of studies and industrial toolkits in laser-based additive manufacturing processes. Some methods that are already industrially available in laser powder bed fusion systems, such as in situ detection of recoating errors, have not y

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Li, Ruihua, Hao Li, and Bo Hu. "Damage Identification of Large Generator Stator Insulation Based on PZT Sensor Systems and Hybrid Features of Lamb Waves." Sensors 18, no. 9 (2018): 2745. http://dx.doi.org/10.3390/s18092745.

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Large generators are the principal pieces of equipment in power systems, and their operation reliability critically depends on the stator insulation. Damages in stator insulation will gradually lead to the failure and breakdown of generator. Due to the advantages of Lamb waves in Structural health monitoring (SHM), in this study, a distributed piezoelectric (PZT) sensor system and hybrid features of the Lamb waves are introduced to identify stator insulation damage of large generator. A hierarchical probability damage-imaging (PDI) algorithm is proposed to tackle the material inhomogeneity and

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Vértesy, Gábor, Antal Gasparics, and Ildikó Szenthe. "Investigation of Potential Material Inhomogeneity in the Magnetically Detected Neutron-Irradiation-Generated Structural Degradation of Nuclear Reactor Pressure Vessel Steel." Applied Sciences 12, no. 22 (2022): 11640. http://dx.doi.org/10.3390/app122211640.

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A novel nondestructive method called magnetic adaptive testing has been previously applied to detect the neutron-irradiation-generated structural changes in reactor pressure vessel steel material. This method has been found to be a useful tool for this purpose, and good correlation—as a tendency—has been found between the estimated ductile-to-brittle transition temperature and magnetic parameters. However, a significant scattering of measured points was also observed for the investigated set of Charpy specimens. The main result of the work was that by magnetic selection of samples, the scatter

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Ley, Sebastian, Jürgen Sachs, Bernd Faenger, Ingrid Hilger, and Marko Helbig. "MNP-Enhanced Microwave Medical Imaging by Means of Pseudo-Noise Sensing." Sensors 21, no. 19 (2021): 6613. http://dx.doi.org/10.3390/s21196613.

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Magnetic nanoparticles have been investigated for microwave imaging over the last decade. The use of functionalized magnetic nanoparticles, which are able to accumulate selectively within tumorous tissue, can increase the diagnostic reliability. This paper deals with the detecting and imaging of magnetic nanoparticles by means of ultra-wideband microwave sensing via pseudo-noise technology. The investigations were based on phantom measurements. In the first experiment, we analyzed the detectability of magnetic nanoparticles depending on the magnetic field intensity of the polarizing magnetic f

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Steinbild, P. J., N. Wieja, J. Condé-Wolter, et al. "Changes in electric resistance of cracked copper-coated, pitch-based carbon fibres for structural health monitoring in a glider wing." Journal of Physics: Conference Series 2526, no. 1 (2023): 012066. http://dx.doi.org/10.1088/1742-6596/2526/1/012066.

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Abstract Structural health monitoring based on detecting strain enables further exploitation of the lightweight potential of aircraft structures. Since carbon fibres (CF) can be easily integrated into aircraft structures made of fibre-reinforced plastics (FRP), their use in sensor applications has become subject of research. One of many novel approaches is the use of cracked CF for strain detection. During loading and unloading, the fibre cracks are opening and closing respectively, resulting in substantial changes in the electric resistance of the CF. The high dependence of the electric resis

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Yang, Lei, Dexu Mu, Zhen Xu, and Kaiyu Huang. "Apple Surface Defect Detection Based on Gray Level Co-Occurrence Matrix and Retinex Image Enhancement." Applied Sciences 13, no. 22 (2023): 12481. http://dx.doi.org/10.3390/app132212481.

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Aiming at the problems of uneven light reflectivity on the spherical surface and high similarity between the stems/calyxes and scars that exist in the detection of surface defects in apples, this paper proposed a defect detection method based on image segmentation and stem/calyx recognition to realize the detection and recognition of surface defects in apples. Preliminary defect segmentation results were obtained by eliminating the interference of light reflection inhomogeneity through adaptive bilateral filtering-based single-scale Retinex (SSR) luminance correction and using adaptive gamma c

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Kim, Jun Sung, Sang-Kyu Park, and Haeshin Lee. "Sniffer worm, C. elegans, as a toxicity evaluation model organism with sensing and locomotion abilities." PLOS ONE 18, no. 8 (2023): e0289493. http://dx.doi.org/10.1371/journal.pone.0289493.

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Additive manufacturing, or 3D printing, has revolutionized the way we create objects. However, its layer-by-layer process may lead to an increased incidence of local defects compared to traditional casting-based methods. Factors such as light intensity, depth of light penetration, component inhomogeneity, and fluctuations in nozzle temperature all contribute to defect formations. These defective regions can become sources of toxic component leakage, but pinpointing their locations in 3D printed materials remains a challenge. Traditional toxicological assessments rely on the extraction and subs

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Li, Jun, Hongfei Gao, Yunjing Li, et al. "The Development of a Series of Genomic DNA Reference Materials with Specific Copy Number Ratios for The Detection of Genetically Modified Maize DBN9936." Foods 13, no. 5 (2024): 747. http://dx.doi.org/10.3390/foods13050747.

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The genetically modified (GM) maize DBN9936 with a biosafety certificate will soon undergo commercial application. To monitor the safety of DBN9936 maize, three genomic DNA (gDNA) reference materials (RMs) (DBN9936a, DBN9936b, and DBN9936c) were prepared with nominal copy number ratios of 100%, 3%, and 1% for the DBN9936 event, respectively. DBN9936a was prepared from the leaf tissue gDNA of DBN9936 homozygotes, while DBN9936b and DBN9936c were prepared by the quantitative mixing of gDNA from the leaf tissues of DBN9936 homozygotes and non-GM counterparts. Validated DBN9936/zSSIIb duplex dropl

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Xie, Huiyu, Chenxi Ou, Xinhui Chen, and Gang Yang. "Numerical Analysis of the Temperature Rise at Fast Filling of Hydrogen Storage Cylinder Based on Fluid-Thermal-Solid Coupling." Journal of Physics: Conference Series 2610, no. 1 (2023): 012025. http://dx.doi.org/10.1088/1742-6596/2610/1/012025.

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Abstract Taking the type III hydrogen storage cylinder of a hydrogen energy detection institution as the research object, the fluid-thermal-solid coupling calculation and analysis were carried out on ANSYS Workbench, fully considering the differences among different material layers and the inhomogeneity of temperature load distribution. The results showed that the maximum temperature of the cylinder and the maximum stress on the carbon fiber winding layer both appeared at the connection between the end head and the cylinder when the filling was finished. The thermal stress caused by temperatur

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Mikuła, Edyta, and Kamila Malecka-Baturo. "An Overview of the Latest Developments in the Electrochemical Aptasensing of Neurodegenerative Diseases." Coatings 13, no. 2 (2023): 235. http://dx.doi.org/10.3390/coatings13020235.

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Neurodegenerative diseases (NDs) are becoming a major global health problem. They constitute an incurable diverse group of disorders characterized by the progressive degeneration of the structure and function of the central or peripheral nervous system. There is an enormous unmet demand worldwide for methods for the early detection of ND biomarkers. The complexity of the molecular mechanisms underlying neuronal degeneration as well as the inhomogeneity of the patient population pose a great challenge for the development of early diagnostic tools. Various analytical technologies have been devel

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Bosse, Stefan, Dennis Weiss, and Daniel Schmidt. "Supervised Distributed Multi-Instance and Unsupervised Single-Instance Autoencoder Machine Learning for Damage Diagnostics with High-Dimensional Data—A Hybrid Approach and Comparison Study." Computers 10, no. 3 (2021): 34. http://dx.doi.org/10.3390/computers10030034.

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Structural health monitoring (SHM) is a promising technique for in-service inspection of technical structures in a broad field of applications in order to reduce maintenance efforts as well as the overall structural weight. SHM is basically an inverse problem deriving physical properties such as damages or material inhomogeneity (target features) from sensor data. Often models defining the relationship between predictable features and sensors are required but not available. The main objective of this work is the investigation of model-free distributed machine learning (DML) for damage diagnost

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Bache, Martin R., Christopher D. Newton, John Paul Jones, et al. "Advances in Damage Monitoring Techniques for the Detection of Failure in SiCf/SiC Ceramic Matrix Composites." Ceramics 2, no. 2 (2019): 347–71. http://dx.doi.org/10.3390/ceramics2020028.

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From a disruptive perspective, silicon carbide (SiC)-based ceramic matrix composites (CMCs) provide a considerable temperature and weight advantage over existing material systems and are increasingly finding application in aerospace, power generation and high-end automotive industries. The complex structural architecture and inherent processing artefacts within CMCs combine to induce inhomogeneous deformation and damage prior to ultimate failure. Sophisticated mechanical characterisation is vital in support of a fundamental understanding of deformation in CMCs. On the component scale, “damage

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Rabbi, MS, and K. Teramoto. "A0-Mode Lamb Wave Based Detection of Corrosion under Coating Film in Plate-Like Metallic Structures: Analytical, Finite Element and Experimental Studies." GUB Journal of Science and Engineering 5, no. 1 (2018): 37–44. http://dx.doi.org/10.3329/gubjse.v5i1.47899.

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The fundamental order antisymmetric mode (A0-mode) Lamb wave based a quantitative acoustical imaging technique is proposed in this paper to classify the corroded region under coating film within the metallic structure. This method estimates versatility qualities of the zone of intrigue to some degree inhomogeneity differentiated to the encompassed materials. However, a converging region consisting of incident wave field and scattered wave field difficult to demonstrate from the observed signals. The proposed method focuses on reconstructing the image of the defect by calculating the shear stra

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Zumr, David, Václav David, Josef Krása, and Jiří Nedvěd. "Geophysical Evaluation of the Inner Structure of a Historical Earth-Filled Dam." Proceedings 2, no. 11 (2018): 664. http://dx.doi.org/10.3390/proceedings2110664.

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Small earth dams usually lack the detailed seepage monitoring system that would provide high resolution data on changes in seepage flow. Alternative solution is monitoring of the temperature and electrical resistivity in the body of the dams. Geophysical methods are useful techniques for a non-destructive exploration of the subsurface. We have utilized the combination of electrical resistivity tomography (ERT), ground penetrating radar (GPR) and multi-depth electromagnetical conductivity meter (CMD) techniques to observe the inner structure, especially internal failures, of the historical eart

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Apostolopoulos, G., C. Pavlaki, V. Perleros, and G. Amolochitis. "Geophysical investigation and its geological interpretation in the frame of an intergrated survey prior to a dam construction in Plati River Valley, Rethymno, Greece." Bulletin of the Geological Society of Greece 47, no. 3 (2016): 1052. http://dx.doi.org/10.12681/bgsg.10948.

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A geophysical survey using electrical resistivity tomography (ERT) method(25 ERT profiles of 240m total length and 2 ERT profiles of 1000m total length) in the area of Plati River valley gave valuable information regarding the stratigraphy, related to loose sediments, various faces of flysch and limestone, the tectonic status and the detection of areas of thick and extensive sheared siltstone, that geoelectrically is similar to clay,material useful for the core of the future dam. Both branches of river and valley and in greater detail the area near the position of the dam have detected showing

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Castel, Vincent, Jamal Ben Youssef та Christian Brosseau. "Broadband Ferromagnetic Resonance Measurements in Ni/ZnO and Niγ-Fe2O3Nanocomposites". Journal of Nanomaterials 2007 (2007): 1–16. http://dx.doi.org/10.1155/2007/27437.

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A comparative study at the ambient temperature of the ferromagnetic resonance (FMR) spectra of Ni/ZnO andNi/γ-Fe2O3nanocomposites (NCs) is reported. A microstrip transmission line technique was used to measure the FMR profiles and linewidths in the 8–24 GHz frequency range. The samples were placed at the center of a microstrip line where the derivative of the absorbed power was measured using a standard ac field modulation technique (10 Oe amplitude) and lock-in detection. The analysis of the FMR spectra can be interpreted as arising from aggregates of magnetic nanoparticles, each of which res

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Молодід, О. C., В. О. Поколенко, О. О. Молодід, Р. О. Плохута, and І. В. Мусіяка. "DIAGNOSIS OF USEFUL USEFULNESS OF BUILDING STRUCTURES AS A PREREQUISITE FOR CONTINUING THEIR LIFE CYCLE." Building production, no. 71 (May 22, 2023): 21. http://dx.doi.org/10.36750/2524-2555.71.21-27.

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Normative documents regulate the periodic inspection of buildings and structures or their parts in order to establish their technical condition at the time of the inspection to ensure further reliable and safe operation. The result of the inspection is a technical report with conclusions and recommendations on methods of eliminating the identified defects or structure damages.Usually, during the preliminary visual inspection of the building structures the presence of damage defects is established and the need for additional special inspections with the use of special equipment.To detect struct

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He, Jingang, Hang Yuan, Zhong Su, Bin Zhao, Zhe Kuang, and Pengfei Song. "Analysis of Information Transmission Characteristics Based on Adaptive Ground Electrode Current Field." Applied Sciences 13, no. 7 (2023): 4297. http://dx.doi.org/10.3390/app13074297.

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The information transmission mechanism of the ground electrode current field uses a very low-frequency electrical signal, which is applied to the two electrodes driven into the soil layer or the collapsed body of the tunnel to form a current field in the rock layer or soil layer. Signal detection is created via the strong penetration of wireless information transmission. This research focuses on various electromagnetic effects, such as polarization, magnetization, and the transmission of electromagnetic waves under the influence of different media, such as rock, sand, reinforced concrete, and

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Ahern, Adam T., Ramachandran Subramanian, Georges Saliba, Eric M. Lipsky, Neil M. Donahue, and Ryan C. Sullivan. "Effect of secondary organic aerosol coating thickness on the real-time detection and characterization of biomass-burning soot by two particle mass spectrometers." Atmospheric Measurement Techniques 9, no. 12 (2016): 6117–37. http://dx.doi.org/10.5194/amt-9-6117-2016.

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Abstract. Biomass burning is a large source of light-absorbing refractory black carbon (rBC) particles with a wide range of morphologies and sizes. The net radiative forcing from these particles is strongly dependent on the amount and composition of non-light-absorbing material internally mixed with the rBC and on the morphology of the mixed particles. Understanding how the mixing state and morphology of biomass-burning aerosol evolves in the atmosphere is critical for constraining the influence of these particles on radiative forcing and climate. We investigated the response of two commercial

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Batrakov, D. O., M. S. Antyufeyeva, А. G. Batrakova, and S. N. Urdzik. "Overview of modern methods of processing georadar signals in tasks of defectoscopy." Visnyk of V.N. Karazin Kharkiv National University, series “Radio Physics and Electronics”, no. 37 (December 30, 2022): 7–19. https://doi.org/10.26565/2311-0872-2022-37-01.

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Relevance. The relevance of research is due to the need to implement strategic tasks to extend the residual resource of engineering structures and ensure their reliability. Implementation of this direction is associated with methods of subsurface sounding, means of obtaining information and its processing. Despite significant progress in the development of modern GPR signal processing methods, the task of choosing the most effective method for the purpose of GPR sounding has not yet been solved. The solution of the given task should be based on the analysis of modern methods of processing GPR

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Aruna Kumar, S. V., Ehsan Yaghoubi, and Hugo Proença. "A Fuzzy Consensus Clustering Algorithm for MRI Brain Tissue Segmentation." Applied Sciences 12, no. 15 (2022): 7385. http://dx.doi.org/10.3390/app12157385.

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Brain tissue segmentation is an important component of the clinical diagnosis of brain diseases using multi-modal magnetic resonance imaging (MR). Brain tissue segmentation has been developed by many unsupervised methods in the literature. The most commonly used unsupervised methods are K-Means, Expectation-Maximization, and Fuzzy Clustering. Fuzzy clustering methods offer considerable benefits compared with the aforementioned methods as they are capable of handling brain images that are complex, largely uncertain, and imprecise. However, this approach suffers from the intrinsic noise and inte

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Mori, Yuki, Chiyuri Komori, and Gen Inoue. "(Digital Presentation) Prediction of an in-Plane Anomalous Current Using Numerical Simulation and Machine Learning." ECS Meeting Abstracts MA2022-02, no. 6 (2022): 604. http://dx.doi.org/10.1149/ma2022-026604mtgabs.

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Even normally shipped batteries may contain disturbing factors such as very small amounts of foreign matter or structural inhomogeneity, which can cause serious accidents such as thermal runaway or explosions. Since dismantling and identifying the cause is time-consuming and costly, nondestructive techniques for identifying the cause are required. A method for detecting abnormal current distribution by magnetic field inverse analysis has been proposed as one such method, but it is difficult to directly elucidate the factors that cause the abnormal current distribution itself. In this study, we

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Yamane, Yuji, Isao Ando, Fredric L. Buchholz, Alan R. Reinhardt, and Shulamith Schlick. "Detection of Spatial Inhomogeneity in Poly(acrylic acid) Gels by Measuring Time-Dependent Diffusion Coefficients of a Probe in NMR Experiments: Effect of the Degree of Cross-Linking and Degree of Swelling." Macromolecules 37, no. 26 (2004): 9841–49. http://dx.doi.org/10.1021/ma048343v.

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Michaud, Laurent Gaëtan, Frank Fournel, Christophe Morales, et al. "Inline Bondwave Monitoring for Direct Bonding, Process Optimization and Impact on Post-Bond Distortion." ECS Meeting Abstracts MA2023-02, no. 33 (2023): 1587. http://dx.doi.org/10.1149/ma2023-02331587mtgabs.

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Direct wafer bonding, named also fusion wafer bonding, is based on the formation of molecular bonds between the two surfaces placed in contact. By the initiation of the contact between the two surfaces the bond is self-propagating: at the initiation point a bondwave is generated, which propagates free until the entire surfaces are in contact (bonded). The dynamic of the bondwave propagation is depending on various material (substrates) and process parameters. As shown by Rieutord et al. (1), and experimentally confirmed (2), for a given material and geometry, the speed is function of adhesion

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Winchester, Andrew, and Sujitra Pookpanratana. "(Invited) Advanced Electronic Characterization of Wide Band Gap Semiconductor Defects at the Nanoscale." ECS Meeting Abstracts MA2024-01, no. 32 (2024): 1578. http://dx.doi.org/10.1149/ma2024-01321578mtgabs.

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Wide bandgap materials such as gallium nitride (GaN) and gallium oxide (Ga2O3) are currently under development for realizing next-generation high power electronic devices beyond silicon. Vertical structures produced through homoepitaxial growth are preferred for scaling high-voltage devices, which places strict demands on the quality of bulk substrates. In particular, extended defects can propagate during epitaxial growth into the active areas of devices. Therefore, there is a need for identifying defects and determining their electronic properties at relevant nano- to micro- scale dimensions

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KAMBOLOV, Dzambolat, Tatiana GERASIMENKO, Oleg GABARAEV, and Valerij KHETAGUROV. "Modeling of minerals contact interactions dynamics in flotation system." Sustainable Development of Mountain Territories 15, no. 3 (2023): 539–57. http://dx.doi.org/10.21177/1998-4502-2023-15-3-539-557.

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Introduction.The work is aimed at studying the dynamics of contact interactions of minerals under conditions modeling the process of froth agitation flotation. The study of the regularities of contact interactions is an urgent task not only because they are used to determine the fundamental macroscopic and microscopic properties of flotation systems, but also because the forces in the contacts between minerals are the most important factor in carrying out a variety of technological processes of mineral separation in ore dressing by flotation. Materials and methods. The main method of research

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