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The Impact and Importance of Fabric Image Preprocessing for the New Method of Individual Inter-Thread Pores Detection

Owczarek Magdalena

Autex Research Journal

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2020

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Vol. 20, no. 3

250--262

EN

The paper describes the impact and importance of preprocessing methods of fabric image for detection of inter-thread pores (ITP), which is a new method of individual ITP identification. The aim of this experiment is to identify precisely every individual ITP of fabric structure by using optimal preprocessing algorithm for further quantitative, morphometric structural analysis of specialized fabrics (barriers, industrial filters, composites, others) in context of air permeability, flow resistance, UV radiation, viruses penetration, thermal comfort by estimation fabric porosity, especially macroporosity parameters and cover factor. The correct identification of individual ITP depends on the acquisition method and the preprocessing algorithm. It was conducted by analyzing the adaptation of digital image preprocessing methods for two structures of plain weave fabric in two magnification zooms, 1.25 and 0.8. Preprocessing operations were performed in the area of spatial operations of the image. The optimal preprocessing algorithm includes low-pass filtering, histogram equalization, nonlinear filtering, thresholding, and morphological operation. This algorithm was selected based on the factors developed by the author (ITP detection, RID factor—a difference between the real and model ITP areas) which rely on the ITP size, shape, and location. The graphic view of the ITP contour position on the fabric image is a verification element in the optimal preprocessing algorithm. The presented results of the air permeability of two different plain weave structures confirm the need to optimize the algorithm of pre-image processing methods to precisely detect each individual ITP in the fabric image.

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Czy anizotropia elektryczna może być wywołana zmianami nasycenia wodą i gazem w mikro- i makroporach skał miocenu?

Bała M.

Przegląd Geologiczny

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2013

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Vol. 61, nr 9

523--531

EN

The paper presents the problem of evaluation of variation in the electrical anisotropy coefficient for sandstone-shaly Miocene deposits depending on water and gas saturation of the pore space. A rock model built of alternating layers with varying micro- and macroporosity is discussed. This may correspond to a rock formation composed ofparallel thin layers of sandstones or mudstones and claystones, which are dominated by macro- and micropores, and are characterized by different grain size or grain sorting. The anisotropy coefficient is then affected by changes in electrical resistivity in individual layers that are a result of changes in saturation.

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Synthesis of spherical macroporous epoxy-tetraethylenepentamine chelating resin for preconcentration and separation of trace noble metal ions

Yang D., Chang X.-J., Wang S., Liu Y. W.

Chemia Analityczna

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2005

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Vol. 50, No. 4

685-694

EN

A new spherical macroporous epoxy-tetraethylenepentamine chelating resin was synthesized from epoxy resin simply and rapidly. Its adsorption-desorption properties were studied in detail. Au(I[l), Pt(IV) and Pd(IV) was quantitatively adsorbed on the resin from aqueous solutions of pH = 2.0-4.0. Adsorption capacities of the resin towards Au(III), Pt(IV) and Pd(IV) were 8.9 x 10-4, 7.6 x 10-4, and 9.6 x 10-4 mol per gram of the epoxytetraethylenepentamine chelating resin, respectively. The adsorbed metal ions were nextdesorbed at 50-60°C using 3% thiourea solution in 2 mol L-1 HCI. Other metal ions caused little interference during preconcentration and simultaneous determination ofAu(IIl). Pt(IV) and Pd(IV) by ICP-AES. Au(III), Pt(IV) and Pd(IV) could be determined at the co

PL

Opisano prostą i szybką metodę syntezy z żywicy epoksydowej kulistego, makroporowatego jonitu chelatującego epoksy-tetraetylenopentaarninowego. Zbadano szczegółowo jego własności adsorpcyjno-desorpcyjne. Au(III), Pt(IV) i Pd(IV) były ilościowo zatrzymywane na jonicie z roztworów wodnych o pH = 2.0r4.0. Pojemności adsorpcyjne jonitu w stosunku do Au(III), Pt(IV) i Pd(IV) wynosiły odpowiednio: 8.9 x l 0-4, 7.6 x l 0-4 i 9.6 5 10-4 mol na gram jonitu. Zatrzymane jony desorbowano w temp. 50-60°C za pomocą 3% roztworu tiomocznika w 2 mol L-4 HCI. Inne jony miały mały wpływ na przebieg zatężania i jednoczesnego oznaczania Au(III), Pt(IV) i Pd(IV) za pomocą ICP-AES. Możliwe było oznaczenie Au(III), Pt(IV) i Pd(IV) nawet na poziomie stężeń l ng mL-1 przy stopniu zatężenia równym 300.