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Research on experimental exploration and identification positioning algorithm for the optimal stretching point of leather in the toggling process / Huan Yuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 5 (09-10/2023)
[article]
Titre : Research on experimental exploration and identification positioning algorithm for the optimal stretching point of leather in the toggling process Type de document : texte imprimé Auteurs : Huan Yuan, Auteur ; Ren Gonchang, Auteur ; Su Xiangyu, Auteur ; Jin Guang, Auteur ; Yang Yiming, Auteur ; Zhang Heng, Auteur Année de publication : 2023 Article en page(s) : p. 175-182 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Algorithmes
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de moutons
Etirement (mécanique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The objective of this research is to address the issue of automated selection of the optimal stretching position for leather during the leather toggling process. By analysing a substantial number of leather profiles and the actions involved in manual stretching and leather stretching, it has been determined that selecting appropriate stretching positions and intervals is the pivotal factor in enhancing leather yield. Through orthogonal experimentation, it has been deduced that the ideal distances between the stretching points on both sides of the head and tail, as well as on both sides of the body parallel to the midrib line, are 12cm and 9cm respectively. Building upon this, the study proposes an algorithm for identifying and locating the most suitable stretching positions based on the simplified skeleton method and the intersection method of drawn circles. The algorithm employs machine vision to obtain the initial image of the leather source, followed by preprocessing to eliminate image defects and accentuated contours. Subsequently, the thinning algorithm extracts the image skeleton, and the convolution operation filters out the ridges and limbs of the leather, resulting in the simplest skeleton that determines the requisite stretching points. Building upon the determination of the necessary stretching points, the remaining contour regions of the leather are established using the circle intersection method, thus obtaining the remaining stretching points. The identified algorithm for identifying the optimal stretching points in this study holds significant importance in the research and development of automated equipment for the leather stretching plate drying process, and serves as a valuable reference for enhancing leather yield and optimising the process. Note de contenu : - The method and principle of selecting stretching points
- Exploration experiment of optimal stretching points
- Design of the optimal stretch point identification algorithm : Image preprocessing - Selection of indispensable stretching points - Selection of other stretching ponts - ALgorithm verification and result analysis
- Table 1 : Table of horizontal parameters of various factors
- Table 2 : Orthogonal experiment scheme and result record table
- Table 3 : Range analysis of the experimental resultsEn ligne : https://drive.google.com/file/d/1rir9LlaHepJ3AlnIpukUQ58D3AOk_wiA/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39956
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 5 (09-10/2023) . - p. 175-182[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24238 - Périodique Bibliothèque principale Documentaires Disponible Scalp care efficacy of a multi-herb extract / Yina Lu in GLOBAL PERSONAL CARE, Vol. 22, N° 6 (06/2021)
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Titre : Scalp care efficacy of a multi-herb extract Type de document : texte imprimé Auteurs : Yina Lu, Auteur ; Zhang Heng, Auteur ; Jun Tian, Auteur Année de publication : 2021 Article en page(s) : p. 33-36 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anti-inflammatoires
Cosmétiques
Cuir chevelu -- Soins et hygiène
Extraits de plantes:Extraits (pharmacie)
Malassezia
Produits capillaires
StatistiqueIndex. décimale : 668.5 Parfums et cosmétiques Résumé : Malassezia furfur is a lipophilic and dermatological pathogenic yeast, which normally exists on human skin, and causes tinea versicolor, seborrhoeic dermatitis, and atopic dermatitis, especially on human scalp. The multi-herb extraction, VGP, which consists of Vitex trifolia fruit, Gentiana scabra, and Polygonum multiflorum root extract was used to study its effect of anti-inflammation, controlling sebum and dandruff on scalp care. Results showed that on the model of NHEK and THP1 cell inflammation induced by Malassezia furfur, VGP can inhibit the expression of interleukin 6 (IL-6), prostaglandin E2 (PGE-2), monocyte chemoattractant protein 1 (MCP-1) and interleukin 1β (IL-1β) in a dose-dependent manner under 0.01% to 0.125% concentration. On the inflammatory model of 3D reconstructed skin induced by H2O2, VGP significantly improved the cell viability and skin structure, and reduced the production of interleukin 8 (IL-8), PGE-2, and leukotriene B4 (LTB4). During 4 week’s treatment with test shampoo containing 0.5% VGP thrice a week on 16 subjects met with different symptoms, VGP reduced the sebum content and TEWL, improved the redness, itching and dandruff on human scalp skin. Therefore, as a natural active ingredient VGP can play a role in scalp care and skin care by targeting inflammation. Note de contenu : - MATERIALS AND METHODS : VGP preparation - Maintenance of cels - Anti-inflammatory experiments on cells - Anti-inflammatory experiments on 3D reconstructed skin - Scalp care test in vivo - Statistical analysis
- RESULTS : Anti-inflammatory efficacy of VGP against M. furfur on cells - VGP inhibited the inflammation and cell damage on reconstructed skin - VGP reduced the itching and redness of human scalp skin
- Table 1 : Effect of VGP on the viability of two cells
- Table 2 : The effect of VGP on scalp redness, dandruff and itchingEn ligne : https://drive.google.com/file/d/1nlf8RoLehtbFeYtKSvSnZ-81El45gOIT/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36118
in GLOBAL PERSONAL CARE > Vol. 22, N° 6 (06/2021) . - p. 33-36[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22720 - Périodique Bibliothèque principale Documentaires Disponible The study of a palmitoyl oligopeptide complex : a 3D anti-aging theory / Lu Yi-Na in SOFW JOURNAL, Vol. 147, N° 6 (06/2021)
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Titre : The study of a palmitoyl oligopeptide complex : a 3D anti-aging theory Type de document : texte imprimé Auteurs : Lu Yi-Na, Auteur ; Zhou Chun-Xia, Auteur ; Yang Ya-Di, Auteur ; Zhang Heng, Auteur ; Tian Jun, Auteur Année de publication : 2021 Article en page(s) : p. 32-36 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antiâge
Antiâge:Antirides
Cosmétiques
Dermo-cosmétologie
Peau -- Soins et hygiène
Peptides
StatistiqueIndex. décimale : 668.5 Parfums et cosmétiques Résumé : Skin is a multifunctional organ but, alongside every other organ system, is subject to both intrinsic and extrinsic aging. Whilst both ageing processes are associated with phenotypic changes in cutaneous cells, the major functional manifestations of ageing occur as a consequence of structural and compositional remodeling of normally long-lived dermal extracellular matrix proteins, flattened dermal-epidermal junction (DEJ), and weaker epidermal function. Many researchers revealed that dermal fibroblast which mainly synthesis the collagen and elastin in dermis, while the epidermal keratinocyte and DEJ are lesser described, especially for peptides. A new palmitoyl oligopeptide complex PTC, which consists of hydrolyzed collagen and oligopeptide, was identified in both keratinocyte and fibroblast, and finally verified in human skin. All data suggest PTC had a 3D theory against skin aging: from epidermal keratinocyte to dermal fibroblast, especially containing the structural proteins of DEJ. Note de contenu : - METHODOLOGY : PTC preparation - Maintenance of cells - Cell proliferation experiments - DEJ proteins ELISA detection - Dermal proteins detection - TGF-β1 ELISA detection - Skin wrinkles evaluation - Statistical analysis
- RESULTS AND DISCUSSION : PTC improves the proliferation of NHEK and HDF-a - PTC improves the expression of DEJ proteins - PTC induced the synthesis of collagens and ECM proteins - PTC upregulated TGF-β1 expression - PTC reduced the wrinkles and roughness of human skinEn ligne : https://drive.google.com/file/d/1y2i5niHSEdMEDs95I0fBe-Wjgmfrv45m/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35973
in SOFW JOURNAL > Vol. 147, N° 6 (06/2021) . - p. 32-36[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22787 - Périodique Bibliothèque principale Documentaires Disponible