Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "surface degradation" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 29
Tytuł:
Tribological Wear Behaviour of Electrical Contacts Made from AgNi10 Composite
Autorzy:
Richert, M. W.
Boczkal, G.
Hotloś, A.
Pałka, P.
Karpiński, M.
Powiązania:
https://bibliotekanauki.pl/articles/355681.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wear behaviour
composite
electrical contact
surface degradation
Opis:
The effect of tribological wear of contacts made from an AgNi10 alloy on microstructure and electrical properties was investigated. The contacts were tested in duty cycles loaded with alternating current of 10A intensity. With this value of the current, intensive arcing of contacts occurred. The contacts were tested in the range of 125 to 500 thousand cycles. The contacting surfaces were reported to suffer a high degree of wear, but electrical resistance of the contact system remained stable.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 4; 2007-2013
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Weathering performance of a wood surface coated with acrylic resin containing UV absorber
Autorzy:
Ozgenc, O.
Powiązania:
https://bibliotekanauki.pl/articles/52672.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
weathering
coating
wood surface
impregnation
heat treatment
surface degradation
acrylic resin
ultraviolet absorption
colour change
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2017, 60, 200
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of layers deposited on 10CrMo9-10 steel after co-combustion of coal and biomass
Analiza osadów powstałych na stali 10CrMo9-10 w wyniku współspalania węgla i biomasy
Autorzy:
Opydo, M.
Dudek, A.
Golański, G.
Urbańczyk, P.
Powiązania:
https://bibliotekanauki.pl/articles/328620.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
energy sector
biomass
co-combustion
surface degradation
steam superheater
energetyka
biomasa
współspalanie
degradacja powierzchni
przegrzewacz pary
Opis:
Energy market is the sector of the economy which has been given a lot of attention in the last decades. This results not only from a global increase in demand for energy but also from the needs for environmental protection. It should be also noted that modernization of the energy sector is capital-intensive. Therefore, the directions of development in this sector should be driven not only by ecological reasons but also by reasonable economic calculus based on in-depth analysis of operational costs in the next decades. For this reason, an important position in the structure of energy generation is taken by co-combustion of various fuels, with particular focus on coal and biomass. Co-combustion of fuel mixtures, with each fuel having varied properties, often accelerates degradation of the structural components of a boiler.
Energetyka w ostatnich dziesięcioleciach jest jedną z tych gałęzi gospodarki, której poświęca się bardzo dużo uwagi. Wynika to nie tylko z globalnego wzrostu zapotrzebowania na energię, ale także z potrzeby ochrony środowiska naturalnego. Jednocześnie należy pamiętać, że modernizacja energetyki jest bardzo kapitałochłonna, dlatego też o kierunkach rozwoju branży muszą decydować nie tylko względy ekologiczne, ale także przemyślany rachunek ekonomiczny oparty na dogłębnej analizie kosztów eksploatacyjnych elektrowni w następnych dekadach. Z tego powodu znaczącą pozycję w strukturze produkcji energii zajmuje współspalanie różnych paliw, głównie węgla i biomasy. Spalanie mieszaniny paliw, z których każde odznacza się zróżnicowanymi właściwościami, często skutkuje przyspieszoną degradacją elementów konstrukcyjnych kotła.
Źródło:
Diagnostyka; 2015, 16, 4; 31-36
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Nano-Copper – Substituted Lead Zirconate as Surface Catalyst for Oxidative Degradation of Organic Dye
Autorzy:
Elsabawy, Khaled M.
Bediwya, Marwa M.
Powiązania:
https://bibliotekanauki.pl/articles/1193007.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Cu-doped-PLZ
Fuchsine dye
Kinetics
SE-microscopy
X-ray Diffraction
oxidative Degradation
Opis:
The oxidative decomposition reactions of fuchsine dye on the surface of nano-catalyst Cu0.5Pb0.5ZrO3 were studied carefully in an aqueous solution in the presence of H2O2 under condition of pseudo-first order reaction. The catalyst was prepared by solid state route using pure nominal composition of metal oxides. The structural and micro-structural properties of the catalyst were characterized well by XRD, SEM and AFM respectively. Many of the kinetic parameters were investigated in this article, results obtained indicated that, the rate of oxidative degradation of acid fuchsine dye was found to be pH-dependent. The mechanism was proposed and the activation parameters were calculated.
Źródło:
World Scientific News; 2016, 31; 111-124
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ability of Response Surface Methodology to Optimize Photocatalytic Degradation of Amoxicillin from Aqueous Solutions Using Immobilized TiO2/Sand
Autorzy:
Sulaiman, Fadia A.
Alwared, Abeer I.
Powiązania:
https://bibliotekanauki.pl/articles/2086434.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
amoxicillin
solar photocatalyst
immobilized TiO2
sand
RSM
response surface methodology
kinetics
Opis:
The response surface method was applied to optimize operational factors in the solar photocatalytic process on the removal of Amoxicillin (AMOX) residues from aqueous solution using TiO2 immobilized on the sand as a catalyst. The results reveal that the degradation percentage of AMOX is 93.12%, when optimal conditions of pH=5, 75 mg/l of TiO2, 400 mg/l of H2O2, and 10 mg/l of AMOX concentration at 150 min irradiation time were used. Furthermore, the model’s expected response results have reasonable similarity with the actual data (R2 = 93.58%), demonstrating the efficiency of this method in making an accurate prediction. A second-order polynomial multiple regression model was used to evaluate the responses, which confirms that was a satisfactory adjustment with the achieved data through analysis of variance (R2 = 93.58%, R2adj = 91.48% and R2pred =89.68%). In addition, it is observed that the removal of undesirable compounds follows a pseudo-2nd order kinetic model with R2 = 0.9862. In conclusion, with the ease of usage of immobilized TiO2 and good photocatalytic efficiency, the findings showed the potential application to the antibiotics from an aqueous solution.
Źródło:
Journal of Ecological Engineering; 2022, 23, 5; 293--304
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the thermal degradation process within the steam power plants heat exchangers
Autorzy:
Hajduk, T.
Powiązania:
https://bibliotekanauki.pl/articles/244895.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
steam power plants
fouling of heat transfer surface
thermal degradation determinants
Opis:
The consequence of the deposits presence on the heat transfer surface of the following heat exchangers: shell-and-tube condensers, the regenerative feed water exchangers, are commonly the loss of heat exchanger capacity, owing to the high value of heat conductive resistance of fouling. The process is more often defined as the thermal (heat) degradation of a given heat transfer device. The symptoms of heat degradation are usually defined as the difference between the values of thermal-flow parameters for the current and the reference state. Moreover, this process always entails an increase in the cost of energy conversion, leading to increasing the emission output of greenhouse gases consequently increasing the environmental degradation. It is worth mentioning that deposits settled on the waterside of heat transfer surface could also initiate the process of tubes obliteration. This phenomenon is characteristic for condensers cooled by seawater in particular. Reducing internal diameter of any single heat exchanger pipe by the deposits cause the rise in flow resistance and also reduce the condenser cooling water pump capacity. Ultimately, it leads to the reduction in water flow rate, resulting in an additional increase in the resistance of heat transfer. Furthermore, reducing the flow rate of cooling water causes the enhancement of the fouling settling rate. The paper describes the above-mentioned phenomena and presents the quantitative determinants of the thermal degradation description for heat exchangers based on the results of the author’s own experimental research.
Źródło:
Journal of KONES; 2016, 23, 4; 127-133
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of three techniques to assess surface heterogeneity of solids in soils
Autorzy:
Polubesova, T.A.
Pachepsky, Y.A.
Hajnos, M.
Jozefaciuk, G.
Sokolowska, Z.
Powiązania:
https://bibliotekanauki.pl/articles/25170.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
soil degradation
surface adsorption
surface heterogeneity
energy distribution
heterogeneity
Źródło:
International Agrophysics; 1997, 11, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Algorithm for the extraction of selected rail track ballast degradation using machine vision
Autorzy:
Lesiak, Piotr
Bojarczak, Piotr
Sokołowski, Aleksander
Powiązania:
https://bibliotekanauki.pl/articles/27314062.pdf
Data publikacji:
2023
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
railway track
ballast degradation
image extraction algorithm
surface descriptors
tor kolejowy
Opis:
A number of physical methods are used to survey railway track ballast to assess its degradation as a function of deposition. Simulation tests on track models are also conducted. These testing methods, which are generally labour-intensive and expensive, provide an accurate understanding of the extent of ballast degradation. However, the impact of inadequate maintenance can be observed, even on the surface. Therefore, it seems natural in this case to use image registration. State-of-the-art machine vision systems of track geometry cars provide the means to do this. Obtained ballast images provide a baseline for evaluating its level in relation to sleepers. However, no information is available on other signs of track degradation, such as overgrown vegetation (weeds) or the so-called local muddy areas, which are generally a consequence of poor drainage and a lack of subgrade insulation. These degradations are observed to generate distinctive colour images that are superimposed on the overall image of the ballast surface. They differ in colour and shape. Hence, the authors used this phenomenon to develop an algorithm for the extraction of ballast degradation images based on RGB imaging. Surface descriptors have also been offered to assess these degradations. Extensive measurement material from the railway lines was used to conduct survey experiments based on the examples. The results clearly demonstrate the high success rate of the applied method.
Źródło:
Transport Problems; 2023, 18, 1; 129--141
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The proposal of evaluation of selected thermal-degradation and environmental characteristics of wood modified treatment. Part 1: Determination of selected thermal-degradation characteristics
Propozycja oceny degradacji termicznej i oceny środowiskowej. Część 1. Ocena charakterystyki degradacji termicznej
Autorzy:
Ruzinska, E.
Mitterova, I.
Jablonski, M
Powiązania:
https://bibliotekanauki.pl/articles/8721.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
environment degradation
thermal degradation
wood
surface
treatment
risk substance
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2014, 87
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental aspects of soil surface sealing and compaction
Autorzy:
Debicki, R
Lipiec, J.
Powiązania:
https://bibliotekanauki.pl/articles/802969.pdf
Data publikacji:
1993
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
root system
soil erosion process
erosion
wind erosion
compaction
soil surface
environmental aspect
plant growth
physical degradation
irrigation water
Opis:
The paper presents some environmental impacts caused by two important factors of physical degradation of the soil, i.e., soil surface sealing/crusting phenomena and soil compaction. It can be concluded that despite numerous literature on the subject as well as the Authors' own data collected in model laboratory and field experiments, it is still difficult to judge to what extent the effects of those two processes are negative for both the soil environment and the plant growth.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1993, 400
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The proposal of evaluation of selected thermal-degradation and environmental characteristics of wood modified treatment. Part 2: Determination of selected environmental characteristics
Propozycja oceny degradacji termicznej i oceny środowiskowej. Część 2. Wyznaczanie wybranych charakterystyk środowiskowych
Autorzy:
Ruzinska, E.
Jablonski, M.
Powiązania:
https://bibliotekanauki.pl/articles/7765.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
thermal degradation
environment degradation
environmental characteristics
wood
treatment
determination
risk substance
surface
wood product
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2014, 87
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface Morphology of a Microplastic as an Indicator of Its Microscale Degradation
Autorzy:
Majewski, Kamil A.
Myszograj, Sylwia
Płuciennik-Koropczuk, Ewelina
Powiązania:
https://bibliotekanauki.pl/articles/2051554.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
plastic packaging
one-use packaging
microplastic
degradation
polypropylene
analytical methods
opakowanie plastikowe
opakowania jednorazowego użytku
mikroplastik
degradacja
polipropylen
metody analityczne
Opis:
Most of the plastic produced, being one-use plastic packaging, is finally disposed of into the environment. Several agents such as solar radiation, mechanical forces, and microbial action may enable the degradation of these plastics. The purpose of this article is to present a method for studying the properties of a surface of a microplastic particle affected by erosion at the microscale level, which occurred with the help of destructive forces associated with the impact of the sea. The results of analysis of the morphology of the tested sample of microplastic (consisting of poly(propylene)) allowed observing how it was degraded. Examining the surface of a microplastic, one can analyze a number of factors as well as determine the possible path the material has traveled until it was collected as a sample. By determining the scale of the patterns, it is possible to estimate how long the sample and other microplastics present in marine environments have been there. The use of an Atomic Force Microscope not only allows the surface of the sample to be imaged in a non-destructive manner but also enables the degree of degradation to be calculated mathematically, provided a baseline is established from which erosion can be assumed to have originated.
Źródło:
Civil and Environmental Engineering Reports; 2021, 31, 4; 196-213
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Au-RE-TiO2 nanocomposites. surface characteristics and photoactivity
Autorzy:
Krukowska, A.
Reszczynska, J.
Zaleska, A.
Powiązania:
https://bibliotekanauki.pl/articles/109645.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
photocatalysis
modified TiO2
rare earth metal
Au nanoparticles
toluene degradation
Opis:
Photocatalysts based on TiO2 co-doped with rare earth metal (RE) and gold nanoparticles have been prepared using a sol-gel method and followed by gold reduction. Specific surface areas of the modified photocatalysts were calculated by the Brunauer-Emmett-Teller method (BET). Diffuse reflectance spectra of the obtained photocatalysts were recorded with a UV-Vis spectrophotometer (DRS UV-Vis). The influence of the type of rare earth metal on photoactivity of Au-RE-TiO2 nanocomposites in model reaction manifested by toluene photodegradation in a gas phase was investigated. The obtained results showed that photodegradation of toluene in the gas phase is possible over Au-RE-TiO2 irradiated by UV or Vis light. The Au-RE-TiO2 photocatalysts relative to undoped TiO2, did not caused an increase of toluene degradation in the air under visible light. The samples doped with Er3+ or Pr3+ presented the highest activity in solar light among of Au-RE-TiO2. It was observed that both metal dopants affected the surface area of TiO2. The Au-RE-TiO2 photocatalysts relative to undoped TiO2 exhibited the absorption properties under Vis light.
Źródło:
Physicochemical Problems of Mineral Processing; 2014, 50, 2; 551-561
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of the water composition on the degradation kinetics of natural organic matter in photocatalytic membrane reactors
Autorzy:
Rajca, M
Powiązania:
https://bibliotekanauki.pl/articles/208135.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
water hardness
biological materials
bioreactors
degradation
deionized water
kinetics
membranes
rate constants
surface water
first order reactions
natural organic matters
photocatalytic process
twardość wody
materiały biologiczne
bioreaktory
degradacja
woda dejonizowana
kinetyka
membrany
stałe szybkości
wody powierzchniowe
reakcje pierwszego rzędu
naturalne substancje organiczne
proces fotokatalityczny
surface waters
Opis:
Decomposition kinetics of natural organic substances during the photocatalytic process with a semi-conductor TiO2 has been investigated. In the study, a laboratory reactor Heraeus and in a photocatalytic membrane reactor were used. Simulated solutions of deionized water, surface water and fulvic acids, differing in composition, were tested in the experiment. In order to determine reaction rate constants, the Langmuir–Hinshelwood kinetic model based on the first order reaction was applied. It was found that photocatalytic process enabled effective degradation of natural organic substances although its run was affected by inorganic ions, mainly those producing water hardness, present in water.
Źródło:
Environment Protection Engineering; 2015, 41, 1; 29-39
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of Rock Joints Interface Under Cyclic Loading
Autorzy:
Maciejewski, Jan
Bąk, Sebastian
Ciężkowski, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/178821.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
cyclic shear test
asperity degradation
elliptic yield surface
material interface response
rock joint interface
Opis:
The problem of numerical simulation of the material interface response under monotonic and cyclic loading is of fundamental scientific and engineering importance. In fact, such interfaces occur in most engineering and geotechnical structures. The present work is devoted to the deformational response analysis of contact interfaces under monotonic and cyclic loads. The class of materials includes rock and structural joints, soil structure interfaces, masonry and cementitious joints, localized shear bands and so on. The aim of the proposed model is to simulate the cyclic shear test under constant normal load. The associated dilatancy effect is associated with the configurational effects of asperity interaction or dilatancy of wear debris layer. The large primary asperities are assumed as responsible for interfacial dilation and small size asperities as governing frictional sliding and hysteresis response. The elliptic loading yield function is assumed to translate and rotate during progressive or reverse loading events. The model formulation is discussed and confronted with experimental data.
Źródło:
Studia Geotechnica et Mechanica; 2020, 42, 1; 36-47
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 29

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies