Accueil
Détail de l'auteur
Auteur Yang Wang |
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la recherche
Colour-patterned fabric-defect detection using unsupervised and memorial defect-free features / Hongwei Zhang in COLORATION TECHNOLOGY, Vol. 138, N° 6 (12/2022)
[article]
Titre : Colour-patterned fabric-defect detection using unsupervised and memorial defect-free features Type de document : texte imprimé Auteurs : Hongwei Zhang, Auteur ; Weiwei Zhang, Auteur ; Yang Wang, Auteur ; Shuai Lu, Auteur ; Le Yao, Auteur ; Xia Chen, Auteur Année de publication : 2022 Article en page(s) : p. 602-620 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automatisation
Détection de défauts (Ingénierie)
Teinture -- Fibres textiles
Textiles et tissus -- Défauts
Textiles et tissus imprimésIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Automatic colour-patterned fabric-defect detection is essential and challenging in controlling manufacturing quality. Because of the scarcity of defective colour-patterned fabric samples and the imbalance of defect types, an auto-encoder trained with defect-free samples is used. However, the auto-encoder sometimes has weak generalisation ability, leading to mis- or over-detection of defects. An unsupervised and memorising defect-free method is proposed for colour-patterned fabric defects. The method designs a memory-guided quantisation variational auto-encoder-2 model and improves the residual post-processing operation. Specifically, it has three significant characteristics. First, it avoids time-consuming and laborious manually labelled samples and only needs defect-free samples in the training phase. Second, we expect the reconstruction image to be a defect-free image. Thus, memory modules are introduced to encourage the model to memorise the features of defect-free samples, which help to remove the image defect areas at the testing stage. Third, to further improve the detection accuracy, the closing operation is used to deal with the residual image that is calculated between the tested and the corresponding reconstructed image. Extensive experiments on various representative fabric samples demonstrated the effectiveness and superiority of the proposed method. Note de contenu : - RELATED WORK : Fabric-defect detection - Memory networks
- METHOD: Network structure - Model training - Model testing
- EXPERIMENTAL RESULTS AND ANALYSIS : Experimental platform - Experimental dataset - Evaluation indexes - Implementation details - Qualitative and quantitative analysis
- Table 1 : The numbers of defective and non-defective samples in the YDFID-1 dataset
- Table 2 : Comparison of detection performance of different threshold parameters and different mathematical morphology processing methods
- Table 3 : PSNR and SSIM values of reconstruction results of seven models
- Table 4 : Quantitative analysis and comparison of test results of seven models under four evaluation indexesDOI : https://doi.org/10.1111/cote.12624 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12624 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38375
in COLORATION TECHNOLOGY > Vol. 138, N° 6 (12/2022) . - p. 602-620[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 23716 - Périodique Bibliothèque principale Documentaires Disponible Polydopamine functional reduced graphene oxide for enhanced mechanical and electrical properties of waterborne polyurethane nanocomposites / Shengwen Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 6 (11/2018)
[article]
Titre : Polydopamine functional reduced graphene oxide for enhanced mechanical and electrical properties of waterborne polyurethane nanocomposites Type de document : texte imprimé Auteurs : Shengwen Zhang, Auteur ; Dandan Zhang, Auteur ; Zhen Li ; Yifan Yang ; Meng Sun ; Ziwen Kong ; Yang Wang ; Huiyu Bai ; Weifu Dong Année de publication : 2018 Article en page(s) : p. 1333-1341 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Conduction électrique
Matériaux hybrides
Nanoparticules
Nanoparticules -- Synthèse
Oxyde de graphène
Polydopamine
Polymères en émulsion
Polyuréthanes
Revêtements -- Propriétés mécaniques
Revêtements en phase aqueuse -- Additifs
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Waterborne polyurethane/polydopamine (PDA) functional reduced graphene oxide (WPU/PDRGO) nanocomposites were prepared by in situ emulsification method. The presence of a PDA layer and the partial reduction of GO by PDA were confirmed by FTIR, XRD, Raman spectra, and TGA. It was found that the interfacial PDA layers facilitated the dispersion of the PDRGO sheets in the WPU matrix and enhanced mechanical properties of the WPU matrix. The resulting WPU/PDRGO nanocomposite coatings show excellent electrical conductivity (9.9 × 10−6–1.1 × 10−4 S cm−1) corresponding to a PDRGO content of 1–16 wt%. The obtained waterborne polyurethane/graphene nanocomposite dispersions are promising for anticorrosion, antistatic, conductive, and electromagnetic interference shielding coatings. Note de contenu : - EXPERIMENTAL : Materials - Dopamine functinalized and reduction of graphene oxide - Preparation of WPU/PDRGO nanocomposites - Characterization
- RESULTS AND DISCUSSION : Functionalization and reduction of GO by dopamine - WPU/PDRGO nanocomposites synthesis and characterization - Mechanical properties of WPU/PDRGO nanocomposite films - Electrical conductivity of the WPU/PDRGO nanocomposite coating - Thermal stability of the WPU/PDRGO nanocomposite filmsDOI : 10.1007/s11998-018-0082-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0082-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31347
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 6 (11/2018) . - p. 1333-1341[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 20388 - Périodique Bibliothèque principale Documentaires Disponible
[article]
Titre : Polysilazanes : Binders that make a difference to surfaces Type de document : texte imprimé Auteurs : Yang Wang, Auteur ; Ralf Grottenmuller, Auteur ; Theresa Lorenz, Auteur Année de publication : 2019 Article en page(s) : p. 38-45 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Essais accélérés (technologie)
Liants
Polysilazanes
Résistance au rayonnement ultraviolet
Résistance aux conditions climatiques
Revêtements -- Additifs:Peinture -- Additifs
Revêtements anti-graffitis
Revêtements organiques
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Polysilazanes are pre-ceramic polymers with a silicon-nitrogen backbone. In recent years they have developed as a high-performance binder in protective coatings for transportation vehicles, commercial and residential buildings, and industrial plants. This article reviews their structure-property relationship and highlights their performance in high-temperature, surface hardness, weathering and corrosion protection, and anti-graffiti applications. Note de contenu : - Synthesis and process
- Heat stability
- Surface Hardness
- Weather and corrosion resistance
- Anti-graffiti properties
- Coating uniformity
- Fig. 1 : Polymer structures for PHPS and OPSZ, where R is H, CH3, CH=CH2, other alkyl, or aryl groups
- Fig. 2 : Polymer structures for PHPS and OPSZ, where R is H, CH3, CH=CH2, other alkyl, or aryl groups
- Fig. 3 : The two curing routes for OPSZ, where R1 and R2 are H, CH3, CH=CH2, other alkyl or aryl groups
- Fig. 4 : Thermal stability evaluation of polysilazanes. Panel A shows the results of TGA for polysilazanes and two commercial silicone resins. All materials were dried at 120°C for four hours before TGA to simulate the thermal stability of their coatings. Panel B shows a stainless-steel exhaust pipe coated with both PHPS and OPSZ-based TBC. Panel C compares the visual appearance of a coated and uncoated exhaust pipe after pyrolysis at 1000°C for one hour in air. Panels B and C were obtained from the Royal Society of Chemistry and Motz et al. at the University of Bayreuth with permission
- Fig. 5 : Characteristics of surface hardness for PHPS and OPSZ coatings. Panel A displays data of surface hardness for PHPS coatings on silicon substrates cured at different temperatures. These coatings have a film thickness of 1–1.2 μm. The hardness was measured via pencil hardness (in blue bars), Martens hardness (orange dots), and indentation resistance (black dots). The dots lines are guides for the eyes. Panel B shows a reference scale of pencil hardness, Martens hardness, and indentation resistance by using a bare glass and PMMA substrate. Panel C shows the anti-scratching property for a ∼3 μm thick OPSZ coating in clearcoat applications, and Panel D shows a similar performance for pigmented coatings. Both pigmented coatings have 17 wt% of pigment loading, a film thickness of 10–12 μm, and the right panel has 40 wt% polysilazane as a binder. Crockmeter test was performed by using an Atlas AATCC Crockmeter with 3M Wet-or-Dry 281Q rubbing cloth
- Fig. 6 : Panel A shows two steel substrates after a 10-day water condensation test at a constant humidity of 50%. They have an electrochemically deposited white basecoat with a film thickness of 15–20 μm that partially covers the substrates. The substrate on the left has a 3–4 μm thick polysilazane-based clearcoat, while the one on the right does not. Panel B shows a similar comparison of coated and uncoated areas on a steel substrate after three days of HCl vapor exposure at room temperature [a beaker of HCl solution (37 vol%) was placed in the test chamber]. The coating thickness is about 2 μm
- Fig. 7 : Panel A is a comparison of contact angle and surface energy for polysilazanes and three common binder materials, including nitrocellulose lacquer, acrylates, and polyurethanes. Also shown in Panel A is the value of the polar and dispersive component of surface energy, and surface energy is a sum of the polar and dispersive component. Panel B shows water drop shapes and contact angle measurements on a neat polysilazane coating and on a formulated polysilazane coating with other surface additives
- Fig. 8 : Panel A is a marker test to demonstrate the ink repellency and easy-to-clean properties for a polysilazane based clearcoat. The inset shows the results after cleaning with a dry towel. Panel B is the result of an anti-graffiti test performed on a similar coating according to ASTM D6578, where level 1—dry cloth, level 2—mild detergent solution, level 3— limonene-based cleaner, level 4—isopropanol, and level 5—methyl ethyl ketone, n.c.—not cleanable
- Fig. 9 : Three-dimensional surface morphology scans for a bare steel substrate (A), an OPSZ-based clearcoat on a steel panel (B), and a similar coating on a glass substrate (C). The polysilazane coating thickness is about 15 μm and 10 μm on the steel and the glass substrate, respectively
- Table 1 : DIN/EN/ISO tests that OPSZ-based coatingsz have successfully passed
- Table 2 : OPSZ coating performance before and after artificial weathering and UV stability testEn ligne : https://drive.google.com/file/d/1KuEizt3Csd6O2NpcxCtM9uj10C1GeiwC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32737
in COATINGS TECH > Vol. 16, N° 6 (06/2019) . - p. 38-45[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 21023 - Périodique Bibliothèque principale Documentaires Disponible Structural and functional age-related changes in some facial signs of Chinese men: A pilot study / Chengda Ye in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 44, N° 5 (10/2022)
[article]
Titre : Structural and functional age-related changes in some facial signs of Chinese men: A pilot study Type de document : document électronique Auteurs : Chengda Ye, Auteur ; Frédéric Flament, Auteur ; Yang Wang, Auteur ; Hua Sun, Auteur ; Guancheng Yang, Auteur ; Yanwen Jiang, Auteur ; Caroline Delaunay, Auteur ; Didier Saint-Léger, Auteur Année de publication : 2022 Article en page(s) : p. 530-541 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biomécanique
Chinois(e)s
Mesure -- Instruments
Signes du visage
Statistiques
Vieillissement cutanéIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : The objective of the study was to associate, on the same Chinese male subjects, changes in facial ageing signs with some biomechanical skin properties.
- Methods : The severities of 20 facial ageing signs of 219 differently aged Chinese men (20–65 years) were graded in blind by trained experts through standardized photographs, using a referential skin Atlas dedicated to Asian men. On each subject, the mechanical properties were assessed on the cheek area (left or right at random) by the validated suction technique Cutometer®. Finally, the skin colour parameters were assessed on images from VISIA-CR device.
- Results : Clinically speaking, the severity of almost all facial ageing signs increases from 30 to 65 years, in a linear-like progression, whereas the 20–30 years shows weak increases. Skin colour shows slight but progressive decreases in Luminance and ITA, whereas the yellow and red components slightly increased between 40 and 65 years. At the exception of skin firmness, the skin mechanical properties show a clear decline during the 30–50 years period and plateau beyond.
- Conclusion : The present study suggests that the 20–30 years period, albeit more clinically ‘silent’ than the other periods of age, seems to be an age range during which early alterations of some dermal elements' onset. Deeper in vivo investigating techniques (Echography, Multiphotonic microscopy) are needed to confirm such hypothesis.Note de contenu : - MATERIALS AND METHODS : Subjects - Clinical grading - Instrumental measurements - Statistics
- RESULTS : Facial clinical signs and age - Instrumental measurements and age
- Table 1 : Distribution of the 219 Chinese male subjects by age groups and their sample sizes
- Table 2 : Summary of the 20 facial signs in Asian men that can be graded by the experts, re-grouped into 5 major clustersDOI : https://doi.org/10.1111/ics.12802 En ligne : https://drive.google.com/file/d/14fwdiRgb67UpQpU9Xw5mjeBfdzGteaA_/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38151
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 44, N° 5 (10/2022) . - p. 530-541[article]
[article]
Titre : The best defence : Polysilazanes as multi-functional binders for surface protection Type de document : texte imprimé Auteurs : Yang Wang, Auteur ; Ceaso Hawkins, Auteur ; Ralf Grottenmuller, Auteur ; Theresa Lorenz, Auteur Année de publication : 2021 Article en page(s) : p. 46-50 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs
Anticorrosion
Liants
Polysilazanes
Résistance à l'abrasion
Résistance aux conditions climatiques
Revêtements anti-graffitis
Revêtements organiques
Revêtements protecteurs
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Polysilazanes present a high-performance binder for use in protective coatings for transportation, commercial and residential buildings, and industrial plants. This article details a systematic study of the structure-performance relatioship of polysilazanes, and compares their surface hardness, anti-graffiti properties and weathering and corrosion protection against materials such as siloxanes and fluoropolymers. Note de contenu : - Versatile curing chemistry
- High gloss as desired by final applications
- High scratch resistance and good anti-graffiti properties
- Novel bider produces durable coating
- Polysilazane outperforms siloxane benchmark in thermal stability
- Multi-functional binder for numerous applicationsEn ligne : https://drive.google.com/file/d/1jszTNUbyZQPqiI0ZeXPAGkLsrgE_p-Vr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36050
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 7-8 (07-08/2021) . - p. 46-50[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 22830 - Périodique Bibliothèque principale Documentaires Disponible