PubAg

Main content area

You searched for: Subject "digital images" Remove constraint Subject: "digital images"
Start Over

Search

1,992  Search Results

« Previous | 1 - 20 of 1,992 |
Number of results to display per page

Search Results

1. Strain measurement of particle-reinforced composites at the microscale: An approach towards concurrent characterization of strain and microstructure

Author:
Zhang, Fengguo; Chen, Zhe; Zhong, Shengyi; Chen, Han; Liu, Jun; Yang, Qing; Wang, Haowei
Source:
Micron 2019 v.121 pp. 33-42
ISSN:
0968-4328
Subject:
digital images,   etc   ; mechanical properties; microstructure;     Show all 3 Subjects
Abstract:
... The mechanical behavior of particle-reinforced composites is largely determined by the interaction between the reinforcing particles and matrix. Although conventional digital image correlation (DIC) allows accurate measurements of strain at microscale, it usually requires preparation of synthetic pattern on the sample surface, which would affect the observation of reinforcing particles. An approac ...
DOI:
10.1016/j.micron.2019.02.012

2. A fluorescent fingerprint recording strategy for complex chemical solution

Author:
Duan, Qiannan; Lee, Jianchao; Zheng, Chaoqun; Zheng, Yunyun; Chen, Han
Source:
Analytical methods 2019 v.11 no.7 pp. 897-900
ISSN:
1759-9679
Subject:
digital images,   etc   ; analytical methods; fluorescence; image analysis;     Show all 4 Subjects
Abstract:
... A fluorescent fingerprint recording strategy for complex chemical solution (CCS) analysis was proposed. Using ink-jet printing technology, the feature information of the CCS was expressed by fluorescence imaging method. Obtained fluorescent fingerprint images (named PEL-image) might provide some possible interlinks among different samples by the digital image analysis. ...
DOI:
10.1039/c8ay02702a

3. Comparisons of bearing properties for various oriented glulam using digital image correlation

Author:
Jeong, Gi Young; Kong, Jin Hyuk; Lee, Sang Joon; Pang, Sung-Jun
Source:
Journal of wood science 2018 v.64 no.3 pp. 237-245
ISSN:
1435-0211
Subject:
digital images,   etc   ; deformation; glulam;     Show all 3 Subjects
Abstract:
... The goal of this study was to analyze the bearing properties of the differently oriented glulam using digital image correlation (DIC). Six differently oriented specimens associated with three anatomical directions including longitudinal (L), radial (R), and tangential (T), and 12-mm drift pins were used to analyze the bearing properties, including yield load and bearing strength. The highest beari ...
DOI:
10.1007/s10086-018-1700-5

4. Measurement of the energy release rate of compressive failure in composites by combining infrared thermography and digital image correlation

Author:
Yuan, Yanan; Wang, Shen
Source:
Composites 2019 v.122 pp. 59-66
ISSN:
1359-835X
Subject:
digital images,   etc   ; composite materials; energy; temperature; thermal stability; thermography;     Show all 6 Subjects
Abstract:
... The compressive behavior of composites after low velocity impact is one of the most important characteristics that should be taken into consideration when evaluating the damage tolerance of composite structures. In this paper, a novel experimental method combining infrared thermography and digital image correlation has been proposed to measure the energy release rate of composites under the compre ...
DOI:
10.1016/j.compositesa.2019.04.022

5. A simple and robust approach for visual overload indication - UD thin-ply hybrid composite sensors

Author:
Rev, Tamas; Jalalvand, Meisam; Fuller, Jonathan; Wisnom, Michael R.; Czél, Gergely
Source:
Composites 2019 v.121 pp. 376-385
ISSN:
1359-835X
Subject:
digital images,   etc   ; acoustics; civil engineering; composite materials; mechanical testing; monitoring;     Show all 6 Subjects
Abstract:
... A novel, purpose-designed, thin interlayer glass/carbon-epoxy hybrid composite sensor concept is presented here that can be used for structural health monitoring (SHM), offering potential for safer operation in service. The hybrid composite sensors indicate the overload of a structure by exhibiting a change in their appearance when loaded in tension over a predefined strain value. The sensors can ...
DOI:
10.1016/j.compositesa.2019.03.005

6. Constitutive properties and plastic instabilities in the heat-affected zones of advanced high-strength steel spot welds

Author:
Rezayat, H.; Ghassemi-Armaki, H.; Bhat, S. P.; Sriram, S.; Babu, S. S.
Source:
Journal of materials science 2019 v.54 no.7 pp. 5825-5843
ISSN:
0022-2461
Subject:
digital images,   etc   ; chemical composition; microstructure; steel; temperature; tempering; tensile strength;     Show all 7 Subjects
Abstract:
... Recent publications have shown that the load-bearing capability of advanced high-strength steel (AHSS) spot welds do not scale linearly with the tensile strength of the base metal. Although this unexpected degradation of welds has been linked to the tempering of the martensite phase in the heat-affected zone (HAZ), the detailed elastic–plastic stress–strain behavior in different regions of the HAZ ...
DOI:
10.1007/s10853-018-03276-9

7. Direct Visualization of Cross-Sectional Strain Distribution in Flexible Devices

Author:
Lee, Tae-Ik; Jo, Woosung; Kim, Wansun; Kim, Ji-Hye; Paik, Kyung-Wook; Kim, Taek-Soo
Source:
ACS applied materials & interfaces 2019 v.11 no.14 pp. 13416-13422
ISSN:
1944-8252
Subject:
digital images,   etc   ; deformation; finite element analysis; microparticles; polymers;     Show all 5 Subjects
Abstract:
... For flexible devices that inevitably undergo repetitive deformations, it is important to evaluate and control the mechanical strain imposed on the flexible systems for enhancing the reliability. In this paper, a novel experimental method to directly visualize cross-sectional strain distribution in the thin flexible devices is proposed. Digital image correlation (DIC) is effectively adapted by usin ...
DOI:
10.1021/acsami.9b01480

8. Elevated temperature characteristics of steel reinforcement incorporating threaded mechanical couplers

Author:
Bompa, D.V.; Elghazouli, A.Y.
Source:
Fire safety journal 2019 v.104 pp. 8-21
ISSN:
0379-7112
Subject:
digital images,   etc   ; geometry; instrumentation; mechanical properties; steel; temperature;     Show all 6 Subjects
Abstract:
... This paper presents an experimental study into the influence of elevated temperatures on the mechanical properties of hot-rolled steel reinforcement which is spliced using two alternative types of threaded couplers. The investigation includes tests performed under steady-state and transient elevated temperature conditions for reinforcement bars of 16 mm and 20 mm diameter. For comparison purposes, ...
DOI:
10.1016/j.firesaf.2018.12.006

9. Progressive failure behaviors and crack evolution of rocks under triaxial compression by 3D digital image correlation

Author:
Tang, Yang; Okubo, Seisuke; Xu, Jiang; Peng, Shoujian
Source:
Engineering geology 2019 v.249 pp. 172-185
ISSN:
0013-7952
Subject:
digital images,   etc   ; andesite; cameras; compression strength; cracking; energy; soil weathering;     Show all 7 Subjects
Abstract:
... In the study, a series of monotonic triaxial compression tests were carried out on Emochi andesite to evaluate the effects of confining pressure on progressive failure behaviors. The three-dimensional digital image correlation (3D-DIC) system consisting of six cameras was used to capture the images based on the transparent pressure cell. The effects of confining pressures on stress thresholds, ene ...
DOI:
10.1016/j.enggeo.2018.12.026

10. Bilinear approach to tensile properties of flax composites in finite element analyses

Author:
Strohrmann, Katharina; Hajek, Manfred
Source:
Journal of materials science 2019 v.54 no.2 pp. 1409-1421
ISSN:
0022-2461
Subject:
digital images,   etc   ; finite element analysis; flax; models; tensile strength; thermodynamics;     Show all 6 Subjects
Abstract:
... Flax fibers show potential in bio-efficiency compared to conventional composite fibers with good mechanical properties. The tensile behavior of flax fibers shows a nonlinear stress–strain relation. Within this work, a bilinear elastic–plastic approach is described, which is based on the generalized Hill potential theory and easily applicable in ANSYS. The method was used to model the nonlinear str ...
DOI:
10.1007/s10853-018-2912-1

11. Theoretical and experimental considerations on the neutral axis of wood beams with a hole in different locations

Author:
Wen, Yuxin; Yang, Ping; Zhao, Jian; Zhao, Dong
Source:
Holzforschung 2018 v.72 no.9 pp. 769-777
ISSN:
1437-434X
Subject:
digital images,   etc   ; wood; wood beams;     Show all 3 Subjects
Abstract:
... Holes contribute to the non-homogeneous nature of solid wood and shift the neutral axis of wood beams away from the centroid. Based on the plane-section assumption and idealized trapezoidal distribution, new calculating formulas will be presented in terms of the location of neutral axis for clear beams and wood beams with a hole at the center, compression zone and tension zone. To verify the resul ...
DOI:
10.1515/hf-2017-0174

12. A method for automated soil horizon delineation using digital images

Author:
Zhang, Yakun; Hartemink, Alfred E.
Source:
Geoderma 2019 v.343 pp. 97-115
ISSN:
0016-7061
Subject:
digital images,   etc   ; A horizons; automation; cameras; color; models; plowing; soil color; soil profiles; texture; topography;     Show all 11 Subjects
Abstract:
... Here we present a novel way to assess soil horizons, their boundaries, and purity. Soil profile images in JPEG format were taken from 17 morphologically different soil profiles using a digital camera. Soil color models and image texture features were extracted from the soil profile images, and k-means clustering was used to segment the soil profile. Four models with different input variables were ...
DOI:
10.1016/j.geoderma.2019.02.002

13. Driving digital rock towards machine learning: Predicting permeability with gradient boosting and deep neural networks

Author:
Sudakov, Oleg; Burnaev, Evgeny; Koroteev, Dmitry
Source:
Computers & geosciences 2019 v.127 pp. 91-98
ISSN:
0098-3004
Subject:
digital images,   etc   ; artificial intelligence; computers; micro-computed tomography; neural networks; permeability; prediction; sandstone;     Show all 8 Subjects
Abstract:
... We present a research study aimed at testing of applicability of machine learn-ing techniques for permeability prediction. We prepare a training set containing. 3D scans of Berea sandstone subsamples imaged with X-ray microtomography and corresponding permeability values simulated with Pore Network approach. We also use Minkowski functionals and Deep Learning-based descriptors of 3D images and 2D ...
DOI:
10.1016/j.cageo.2019.02.002

14. Evaluation of GreenCrop Tracker for the Estimation of Leaf Area Index in Wheat Using Digital Photography

Author:
Sandhu, S. S.; Kaur, Prabhjyot; Singh, Jagdish; Nigam, R.; Gill, K. K.
Source:
Proceedings of the National Academy of Sciences, India, Section B: biological sciences 2019 v.89 no.2 pp. 615-621
ISSN:
0369-8211
Subject:
digital images,   etc   ; canopy; crop yield; labor; leaf area index; simulation models; sowing; wheat;     Show all 8 Subjects
Abstract:
... The information on leaf area index (LAI) is important to agricultural scientists for in-season crop yield estimation using different crop growth simulation models. The determination of LAI using currently available instruments is costly/destructive and time consuming. A technique of LAI estimation using GreenCrop Tracker model is available, but it needs to be validated. Therefore, an investigation ...
DOI:
10.1007/s40011-018-0974-0

15. Synthesis and characterization of one-part geopolymers for extrusion based 3D concrete printing

Author:
Panda, Biranchi; Singh, GVP Bhagath; Unluer, Cise; Tan, Ming Jen
Source:
Journal of cleaner production 2019 v.220 pp. 610-619
ISSN:
0959-6526
Subject:
digital images,   etc   ; aluminum; anisotropy; environmental impact; extrusion; gels; ions; mechanical properties; polymers; viscosity;     Show all 10 Subjects
Abstract:
... Interest in innovative construction processes such as 3D concrete printing (i.e. digital construction), is growing rapidly both in academia and industry. Processing conventional geopolymer mixes, in which alkaline solutions are used for activation, could be troublesome in concrete printing due to the high viscosity of the alkaline solution. One-part geopolymers offer one possible solution to this ...
DOI:
10.1016/j.jclepro.2019.02.185

16. Inter-observer agreement between two observers for bovine digital dermatitis identification in New Zealand using digital photographs

Author:
Yang, DA; Laven, RA
Source:
New Zealand veterinary journal 2019 v.67 no.3 pp. 143-147
ISSN:
1176-0710
Subject:
digital images,   etc   ; color; cows; dermatitis; milking parlors; photographs; probability; New Zealand;     Show all 8 Subjects
Abstract:
... Aims: To assess the inter-observer agreement for detecting bovine digital dermatitis (BDD) lesions in digital colour photographs of the hind feet of cows, which had been taken while the animals were standing to be milked, between two trained observers. Methods: Thirty-six photographs were selected from a total of 184 photographs held by the first author (R1), who had classified them as negative (n ...
DOI:
10.1080/00480169.2019.1582369

17. Enhancing the X-ray contrast of polymeric biochromatography particles for three-dimensional imaging

Author:
Martinez, A.; Kuhn, M.; Briesen, H.; Hekmat, D.
Source:
Journal of chromatography 2019 v.1590 pp. 65-72
ISSN:
0021-9673
Subject:
digital images,   etc   ; X-radiation; absorption; chromatography; computed tomography; hydrophilicity; hydrophobicity; image analysis; liquids; porosity;     Show all 10 Subjects
Abstract:
... A major limitation of the three-dimensional imaging of polymeric biochromatography particle packings using X-ray computed tomography is that the particles have a low density and a high porosity, making them almost undistinguishable from the surrounding liquid phase. Additionally, the employed media are typically composed of materials with low atomic numbers, which exhibit low X-ray absorption. We ...
DOI:
10.1016/j.chroma.2018.12.065

18. Constructing an automatic object-recognition algorithm using labeling information for efficient recycling of WEEE

Author:
Hayashi, Naohito; Koyanaka, Shigeki; Oki, Tatsuya
Source:
Waste management 2019 v.88 pp. 337-346
ISSN:
0956-053X
Subject:
digital images,   etc   ; algorithms; automation; cameras; electronic wastes; labeling techniques; models; photography; recycling; Japan;     Show all 10 Subjects
Abstract:
... In an attempt to select an efficient recycling process for waste electrical and electronic equipment based on the value of individual products, we are engaged in the development of an automatic object-recognition system for discarded equipment. As part of this initiative, we developed a new object-recognition algorithm that uses the information from the labels on the bottoms of digital cameras dis ...
DOI:
10.1016/j.wasman.2019.03.065

19. DEM modelling of sequential fragmentation of zeolite granules under oedometric compression based on XCT observations

Author:
Wang, Pei; Karatza, Zeynep; Arson, Chloé
Source:
Powder technology 2019 v.347 pp. 66-75
ISSN:
0032-5910
Subject:
digital images,   etc   ; X-radiation; computed tomography; granules; mechanical properties; microstructure; models; powders; zeolites;     Show all 9 Subjects
Abstract:
... The objective of our research is to define a new Discrete Element Method (DEM) that can describe the processes involved in particle breakage and the resulting macroscopic behaviour of the particulate assembly, by directly observing and characterizing breakage mechanisms. To this aim, an oedometer compression test is performed on a dry granular assembly of zeolite, while acquiring 3D images of the ...
DOI:
10.1016/j.powtec.2019.02.050

20. Application of digital images and multivariate calibration for the quantification of anthocyanin and antioxidant activity in grape juice

Author:
Beltrame, K.K.; Gonçalves, T.R.; Março, P.H.; Gomes, S.T.M.; Matsushita, M.; Valderrama, P.
Source:
Australian journal of grape and wine research 2019 v.25 no.2 pp. 156-160
ISSN:
1322-7130
Subject:
digital images,   etc   ; algorithms; analytical methods; anthocyanins; antioxidant activity; grape juice; least squares; models; prediction; scanners;     Show all 10 Subjects
Abstract:
... BACKGROUND AND AIMS: The current methods for measuring the anthocyanin concentration (AC) and antioxidant activity (AA) of grape juice have limitations. The objective of this work was therefore to evaluate the application of digital imaging as a simple, fast and low‐cost method for determining AC and AA in juice. METHODS AND RESULTS: The AC and AA of 75 grape juice samples were measured using refe ...
DOI:
10.1111/ajgw.12387