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Tytuł:
Extraction, Chemical Composition and Antidiabetic Potential of Crude Polysaccharides from Centella asiatica (L.) Urban
Autorzy:
Li, Meng
Shahid, Muhammad
Zhang, Xiaobin
Law, Douglas
Mackeen, Mukram M.
Teh, Arnida H.
Najm, Ahmad A.
Fazry, Shazrul
Othman, Babul A.
Powiązania:
https://bibliotekanauki.pl/articles/31341117.pdf
Data publikacji:
2024-05-24
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
alcohol insoluble residue
antidiabetic
mineral elements
monosaccharide composition
response surface methodology
Opis:
The global prevalence of diabetes mellitus (DM) is escalating, posing a significant challenge to human healthcare systems. In the present study, mineral and monosaccharide compositions, and antidiabetic potential of polysaccharide fractions separated from Centella asiatica (L.) leaves (CAL) were assessed. Initial single-factor experiments identified key extraction parameters, further optimized through response surface methodology (RSM) with optimal conditions determined as a liquid-to-solid ratio of 24.43:1 (mL/g), extraction time of 60.76 min, and a temperature of 83.31℃. Alcohol insoluble residue (AIR) extraction yielded three crude polysaccharide fractions (P50, P70, and P90). P50 was obtained with the highest yield (14.31%) and exhibited the highest content of total sugars and uronic acids (68.01 and 24.28 g/100 g, respectively). Calcium, magnesium, and manganese were dominant minerals in P50 and P70. Monosaccharide composition analysis via high-performance liquid chromatography (HPLC) demonstrated enrichment of galacturonic acid, galactose, and arabinose in P50 and P70. Furthermore, both fractions (P50 and P70) exhibited dose-dependent inhibitory effects on α-amylase and α-glucosidase. At 5 mg/mL, P50 caused 68.3% α-amylase inhibition and 62.3% α-glucosidase inhibition, while P70 triggered 46.8% and 34.1% inhibition, respectively. In conclusion, this study is the first to provide valuable insights into optimizing CAL extraction conditions. Potential utilization of polysaccharide fractions obtained from CAL as components for formulating functional foods can be explored in the future.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2024, 74, 2; 177-187
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A regional comparison of children’s blood cadmium, lead, and mercury in rural, urban and industrial areas of six European countries, and China, Ecuador, and Morocco
Autorzy:
Hrubá, Františka
Černá, Milena
Chen, Chunying
Harari, Florencia
Horvat, Milena
Koppová, Kvetoslava
Krsková, Andrea
Laamech, Jawhar
Li, Yu-Feng
Löfmark, Lina
Lundh, Thomas
Lyoussi, Badiaa
Mazej, Darja
Osredkar, Joško
Pawlas, Krystyna
Pawlas, Natalia
Prokopowicz, Adam
Rentschler, Gerda
Snoj Tratnik, Janja
Sommar, Johan
Spěváčková, Věra
Špirić, Zdravko
Skerfving, Staffan
Bergdahl, Ingvar A.
Powiązania:
https://bibliotekanauki.pl/articles/21375677.pdf
Data publikacji:
2023-09-07
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
biological monitoring
child
mercury
lead
environmental pollutants
cadmium
Opis:
Objectives The authors aimed to evaluate whether blood cadmium (B-Cd), lead (B-Pb) and mercury (B-Hg) in children differ regionally in 9 countries, and to identify factors correlating with exposure. Material and Methods The authors performed a cross-sectional study of children aged 7–14 years, living in 2007–2008 in urban, rural, or potentially polluted (“hot spot”) areas (ca. 50 children from each area, in total 1363 children) in 6 European and 3 non-European countries. The authors analysed Cd, Pb, and total Hg in blood and collected information on potential determinants of exposure through questionnaires. Regional differences in exposure levels were assessed within each country. Results Children living near industrial “hot-spots” had B-Cd 1.6 (95% CI: 1.4–1.9) times higher in the Czech Republic and 2.1 (95% CI:1.6–2.8) times higher in Poland, as compared to urban children in the same countries (geometric means [GM]: 0.13 μg/l and 0.15 μg/l, respectively). Correspondingly, B-Pb in the “hot spot” areas was 1.8 (95% CI: 1.6–2.1) times higher than in urban areas in Slovakia and 2.3 (95% CI: 1.9–2.7) times higher in Poland (urban GM: 19.4 μg/l and 16.3 μg/l, respectively). In China and Morocco, rural children had significantly lower B-Pb than urban ones (urban GM: 64 μg/l and 71 μg/l, respectively), suggesting urban exposure from leaded petrol, water pipes and/or coal-burning. Hg “hot spot” areas in China had B-Hg 3.1 (95% CI: 2.7–3.5) times higher, and Ecuador 1.5 (95% CI: 1.2–1.9) times higher, as compared to urban areas (urban GM: 2.45 μg/l and 3.23 μg/l, respectively). Besides industrial exposure, traffic correlated with B-Cd; male sex, environmental tobacco smoke, and offal consumption with B-Pb; and fish consumption and amalgam fillings with B-Hg. However, these correlations could only marginally explain regional differences. Conclusions These mainly European results indicate that some children experience about doubled exposures to toxic elements just because of where they live. These exposures are unsafe, identifiable, and preventable and therefore call for preventive actions.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2023, 36, 3; 349-364
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of TaqMan-based real-time PCR assay based on the E1 genefor the quantitative detection of the Getah virus
Autorzy:
Lin, A.
Hu, X.
Cui, S.
Yang, T.
Zhang, Z.
Li, P.
Guo, M.
Lu, Y.
Powiązania:
https://bibliotekanauki.pl/articles/16647453.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Getah virus
real-time PCR
TaqMan
detection
Opis:
To develop a sensitive, specific, and rapid approach for the detection Getah virus (GETV), a set of primers targeting the conserved region of the E1 gene was created. The TaqMan-based real-time PCR method for GETV detection was developed by optimizing the reaction conditions. The method demonstrated excellent specificity, and amplification did not occur with the causative agents of all prevalent swine viral infections (CSFV, PRRSV, PRV, PEDV, PTV, and JEV), except GETV. Additionally, upon assessing the sensitivity of the method, the minimum detection limit for GETV was found to be 5.94 copies/μL, which is 10 times higher than that of the traditional PCR approach. Further, the intra- and inter-assay variation coefficients were less than 1%, demonstrating good repeatability. Moreover, GETV was found in 10 of the 20 field serum samples using real-time PCR but only in three of the samples using traditional PCR. Consequently, the first GETV TaqMan-based real-time PCR approach based on the E1 gene was developed for GETV pathogenic diagnoses, and this exhibited high specificity, sensitivity, and repeatability. This assay is practical for the pathogenic diagnosis and epidemiology of GETV.
Źródło:
Polish Journal of Veterinary Sciences; 2023, 26, 1; 21-28
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finite Element Analysis on Structural Behaviour of Geopolymer Reinforced Concrete Beam using Johnson-Cook Damage in ABAQUS
Autorzy:
Mortar, Nurul Aida Mohd
Al Bakri Abdullah, Mohd Mustafa
Hussin, Kamarudin
Razak, Rafiza Abdul
Hamat, Sanusi
Hilmi, Ahmad Humaizi
Shahedan, Noorfifi Natasha
Li, Long Yuan
Aziz, Ikmal Hakem A.
Powiązania:
https://bibliotekanauki.pl/articles/2174588.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fly ash geopolymer
geopolymer concrete
finite element analysis
Johnson Cook Damage
ABAQUS software
Opis:
This paper details a finite element analysis of the behaviour of Si-Al geopolymer concrete beam reinforced steel bar under an impulsive load and hyper velocity speed up to 1 km/s created by an air blast explosion. The initial torsion stiffness and ultimate torsion strength of the beam increased with increasing compressive strength and decreasing stirrup ratio. The study involves building a finite element model to detail the stress distribution and compute the level of damage, displacement, and cracks development on the geopolymer concrete reinforcement beam. This was done in ABAQUS, where a computational model of the finite element was used to determine the elasticity, plasticity, concrete tension damages, concrete damage plasticity, and the viability of the Johnson-Cook Damage method on the Si-Al geopolymer concrete. The results from the numerical simulation show that an increase in the load magnitude at the midspan of the beam leads to a percentage increase in the ultimate damage of the reinforced geopolymer beams failing in shear plastic deformation. The correlation between the numerical and experimental blasting results confirmed that the damage pattern accurately predicts the response of the steel reinforcement Si-Al geopolymer concrete beams, concluded that decreasing the scaled distance from 0.298 kg/m3 to 0.149 kg/m3 increased the deformation percentage.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 4; 1349--1354
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simplified analyses of stress induced anisotropy in remolded soft clay under undrained conditions
Autorzy:
Lin, P.
Li, Z.-x.
Garg, A.
Yadav, J. S.
Powiązania:
https://bibliotekanauki.pl/articles/1818489.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
stress induced anisotropy
Shantou soft clay
true triaxial experiment
anizotropia wywołana naprężeniem
miękka glinka Shantou
prawdziwy eksperyment trójosiowy
Opis:
Purpose: The soil’s anisotropy induced by stress (i.e. stress induced anisotropy) has an important effect on the behavior of soil. This paper focuses on analyzing the anisotropy of remolded Shantou soft clay under compression stress path. Design/methodology/approach: Experiments were executed by using three axle experimental instruments. The data obtained from the plain strain tests were analyzed and the relationship between stress and strain was calculated by using the modified Duncan- Chang and Lade-Duncan models. The models were modified under the condition of plain strain and cohesion. Findings: It was concluded that in complex stress path conditions, the conventional triaxial tests may not fully reflect the actual stress of soil and its response in the Duncan-Chang and Lade-Duncan models. Research limitations/implications: The formulation of Mohr-Coulomb failure criterion in the plasticity framework is quite diffcult. As a result, dilatancy cannot be described. The properties of soil in unload or drained conditions remain to be part of further investigated. Practical implications: Based upon the two stiffness parameters, the modified Duncan- Chang model has captured the soil behaviour in a very conformable way and is recommened for practical modeling. These constitutive models of soil are widely used in the numerical analyses of soil structure such as embankments. Originality/value: Duncan-Chang and Lade-Duncan models widely used in engineering practices are modes based on conventional triaxial cases. Both models have have some inherent limitations to represent the stress-strain characteristics of soils, such as shear-induced dilatancy and stress path dependency and required corrections. In this investigation, the tests are carried out in undrained conditions. It is related to the properties of soil in load conditions.
Źródło:
Archives of Materials Science and Engineering; 2020, 105, 2; 56--64
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Solvent-free synthesis of 1-amidoalkyl-2-naphthol and 3-amino-1-phenyl-1H benzo[f]chromene-2-carbonitrile derivatives by Fe3O4@enamine-B(OSO3H)2 as an efficient and novel heterogeneous magnetic nanostructure catalyst
Autorzy:
Li, Fangping
Zhang, Jun
Wang, Longjiang
Liu, Weijian
Yousif, Qahtan A.
Powiązania:
https://bibliotekanauki.pl/articles/778863.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
1-amidoalkyl-2-naphthol
3-amino-1-phenyl-1H benzo[f]chromene-2-carbonitrile
solvent-free conditions
magnetic
catalyst
Opis:
A green procedure for the one-pot three-component synthesis of 1-amidoalkyl-2-naphthol and 3-amino-1-phenyl-1H benzo[f]chromene-2-carbonitrile derivatives from the reaction of 2-naphtol, aldehydes, and malononitrile/acetamide in the presence of a catalytic amount of Fe3O4@enamine-B(OSO3H)2 as an efficient and novel heterogeneous magnetic nanostructure catalyst is described. The catalyst was characterized using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), vibrating sample magnetometry (VSM), energy dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). These strategies possess some merits such as simple work-up method, easy preparation of the catalyst, short reaction times, good-to-high yields, and non-use of hazardous solvents during all steps of the reactions. Moreover, due to the magnetic nature of the catalyst, it was readily recovered by magnetic decantation and can be recycled at least six runs with no considerable decrease in catalytic activity.
Źródło:
Polish Journal of Chemical Technology; 2020, 22, 2; 9-19
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interaction between turbidity currents and a contour current – a rare example from the Ordovician of Shaanxi province, China
Autorzy:
Li, Hua
van Loon, A. J. (Tom)
He, Youbin
Powiązania:
https://bibliotekanauki.pl/articles/950462.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
contourites
turbidites
reworking
Ordos basin
Pingliang formation
kontury
turbidyty
przeróbka
zlewnia
Ordos
Pingliang
Opis:
The silty top parts of graded turbidites of the Late Ordovician Pingliang Formation, which accumulated along the southern margin of the Ordos Basin (central China), have been reworked by contour currents. The reworking of the turbidites can be proven on the basis of paleocurrent directions in individual layers: the ripple-cross-bedded sandy divisions of some turbidites show transport directions consistently into the downslope direction (consistent with the direction of other gravity flows), but in the upper, silty fine-grained division they show another direction, viz. alongslope (consistent with the direction that a contour current must have taken at the same time). Both directions are roughly perpendicular to each other. Moreover, the sediment of the reworked turbidites is better sorted and has better rounded grains than the non-reworked turbidites. Although such type of reworking is well known from modern deep-sea environments, this has rarely been found before in ancient deep-sea deposits. The reworking could take place because the upper divisions of the turbidites involved are silty and consequently relatively easily erodible, while the contour current had locally a relatively high velocity – and consequently a relatively large erosional capability – because of confinement within a relatively narrow trough.
Źródło:
Geologos; 2019, 25, 1; 15-30
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Active fault tolerance control of a wind turbine system using an unknown input observer with an actuator fault
Autorzy:
Li, S.
Wang, H.
Aitouche, A.
Tian, Y.
Christov, N.
Powiązania:
https://bibliotekanauki.pl/articles/329822.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
wind turbine system
linear parameter varying system
fault tolerant control
unknown input observer
elektrownia wiatrowa
sterowanie tolerujące uszkodzenia
obserwator wejściowy
Opis:
This paper proposes a fault tolerant control scheme based on an unknown input observer for a wind turbine system subject to an actuator fault and disturbance. Firstly, an unknown input observer for state estimation and fault detection using a linear parameter varying model is developed. By solving linear matrix inequalities (LMIs) and linear matrix equalities (LMEs), the gains of the unknown input observer are obtained. The convergence of the unknown input observer is also analysed with Lyapunov theory. Secondly, using fault estimation, an active fault tolerant controller is applied to a wind turbine system. Finally, a simulation of a wind turbine benchmark with an actuator fault is tested for the proposed method. The simulation results indicate that the proposed FTC scheme is efficient.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2018, 28, 1; 69-81
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extraction of rubidium and cesium from brine solutions using a room temperature ionic liquid system containing 18-crown-6
Autorzy:
Huang, D.
Zheng, H.
Liu, Z.
Bao, A.
Li, B.
Powiązania:
https://bibliotekanauki.pl/articles/779994.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Rubidium
Cesium
Ionic liquid
18-crown-6
Solvent extraction
Opis:
Application of 1-butyl-3-metyhlimidazaolium hexafl uorophosphate ([C4mim][PF6 ]), in the extraction of rubidium and cesium from brine solutions using 1,4,7,10,13,16-hexaoxacyclooctadecane (18C6) as extractant was investigated. Parameters that affect the extraction including pH of aqueous phase, equilibration time, dosage of the ionic liquid, phase ratio, concentration of 18C6 were studied. Under the optimal conditions, the single extraction effi ciency of rubidium ions and cesium ions were up 84.11% and 94.99%, respectively. The stripping of alkali metal ions from the loaded organic phase with different stripping agents and concentrations were also investigated. The initial value of the K/Cs and K/Rb ratios were 93.0 and 104.3, respectively, which have dropped 91.21% and 88.01%, respectively, after the extraction and stripping experiments. It was taken a big step in the separation and enrichment of cesium (rubidium) ion and potassium ion. The extraction mechanism was revealed most likely to be a cation exchange mode in this system.
Źródło:
Polish Journal of Chemical Technology; 2018, 20, 2; 40-46
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Rib Structure and Elastic Yarn Type Variations on Textile Piezoresistive Strain Sensor Characteristics
Wpływ struktury dzianiny i rodzaju przędzy elastycznej na charakterystykę piezorezystywnego czujnika tekstylnego
Autorzy:
Raji, R. K.
Miao, X.
Zhang, S.
Li, Y.
Wan, A.
Powiązania:
https://bibliotekanauki.pl/articles/233476.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
strain sensor
sensitivity
piezoresistance
elastic yarn
weft knitting
czujnik odkształcenia
czułość
odporność na piezorezystancję
elastyczna przędza
dzianie wątku
Opis:
Production parameters have been established to play a fundamental role in dictating the physical characteristics and sensing properties of knitted sensors. This research studied the influence of elastic yarn type and rib fabric structure variation on the physical, tensile and conductive properties and sensitivity performance of knitted underwear strain sensors to be used for breathing mensuration. Four different structures in 1×1, 1×2, 1×3 and 2×2 mock ribs were knitted using covered elastic (CY) and bare strand elastic yarn (BS) combinations. These two parameters proffered unique physical, conductive and tensile characteristics to the samples. Wear and machine tests were conducted to ascertain the sensor’s piezoresistive responses. The machine test showed a higher piezoresistive response, with an average peak value (APV) from 1.70 Ω to 0.24 Ω, while those for the wear test recorded were around 0.0110 Ω to 1.867 Ω for all sample categories. However, sensors knitted with covered elastic yarns produced the best breathing test results (APV of 1.089 Ω – 1.86 Ω) compared to bare strand elastic yarns (APV 0.0027 Ω – 0.0790 Ω) when used in a wearable environment. Fabric structure variation had influences on both conductive and tensile characteristics; however, the effects on the piezoresistive response were negligible. The influences of the unique characteristics provided by these core parameters on sensor resistance values, piezoresistance, aging, ease of deformation and dimensional stability have also been discussed.
W pracy badano wpływ struktury dzianiny i rodzaju przędzy na właściwości fizyczne, rozciągające i przewodzące oraz czułość dzianinowych czujników umieszczonych w wyrobach bieliźnianych. Czujniki mają znaleźć zastosowanie w pomiarach napięcia oddechowego. Badaniom poddano cztery różne dzianiny: 1 × 1, 1 × 2, 1 × 3 i 2 × 2, w procesie dziania wykorzystano kombinacje przędz elastycznych powlekanych (CY) i niepowlekanych (BS). Dało to unikalne właściwości fizyczne, przewodzące i rozciągające próbki. W celu ustalenia reakcji piezorezystywnych czujnika przeprowadzono dwa rodzaje testów. Test maszynowy wykazał wyższą reakcję piezorezystywną, ze średnią wartością szczytową (APV) od 1,70 Ω do 0,24 Ω, podczas gdy dla testu zużycia zarejestrowano około 0,0110 Ω do 1,867 Ω dla wszystkich kategorii próbek. Jednakże, czujniki dzianinowe z powleczonymi przędzami elastycznymi dały najlepsze wyniki testu oddychania (APV o wartości 1.089 Ω – 1.86 Ω) w porównaniu do niepowleczonych przędz elastycznych (APV 0,0027 Ω – 0,0790 Ω), podczas stosowania ich w środowisku noszenia. Zmiana struktury dzianiny miała wpływ na właściwości przewodzące i rozciągające, jednak wpływ na reakcję piezorezystywną był znikomy. Omówiono również wpływ unikalnych cech tych podstawowych parametrów na wartości rezystancji czujnika, odporność na piezorezystencję, starzenie, łatwość deformacji i stabilność wymiarową.
Źródło:
Fibres & Textiles in Eastern Europe; 2018, 5 (131); 24-31
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphology of Three Aloricate Choreotrich ciliates, Including Description of a New Species Parastrombidinopsis costalis sp. n. (Ciliophora, Choreotrichia), and phylogeny of the genus Parastrombidinopsis
Autorzy:
Song, Wen
Li, Jiamei
Huang, Yaoyao
Hu, Xiaozhong
Liu, Weiwei
Al-Rasheid, Khaled A. S.
Miao, Miao
Powiązania:
https://bibliotekanauki.pl/articles/52258906.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
choreotrich ciliates
ciliature
new combination
Strombidinopsidae
SSU rRNA gene
taxonomy
Opis:
As a follow-up part of our studies of the tropical ciliate fauna carried out in the last decade, we investigated the morphology and phylogeny of three choreotrich ciliates, viz, Parastrombidinopsis costalis sp. n., P. pelagica (Fauré-Fremiet, 1924) comb. n. and P. minima Tsai et al., 2008. The new species is characterized by its unique asymmetrical cell shape, 19–21 collar membranelles, one buccal membrane, and eight unevenly distributed somatic kineties. An improved diagnosis of P. pelagica(Fauré-Fremiet, 1924) comb. n.is given based on the original and current studies, the species is characterized by a large cell size, an elongate obconical cell shape, 31–36 collar membranelles and 13–15 somatic kineties. The species P. minimais redescribed based on a new population with some new features supplemented. SSU rRNA genes of both the new species and P. minima were sequenced and a phylogenetic review of related taxa obtained has been performed in order to reveal their systematic relationships. The monophyly of the genus Parastrombidinopsis is highly supported in our phylogenetic analyses.
Źródło:
Acta Protozoologica; 2018, 57, 3; 153-167
0065-1583
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On-the-fly diagnosability analysis of bounded and unbounded labeled Petri nets using verifier nets
Autorzy:
Li, B.
Khlif-Bouassida, M.
Toguéyni, A.
Powiązania:
https://bibliotekanauki.pl/articles/330272.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fault diagnosis
discrete event system
labeled Petri nets
on-the-fly diagnosability analysis
verifier nets
diagnostyka błędu
układ zdarzeń dyskretnych
sieci Petriego
Opis:
This paper considers the problem of diagnosability analysis of discrete event systems modeled by labeled Petri nets (LPNs). We assume that the LPN can be bounded or unbounded with no deadlock after firing any fault transition. Our approach is novel and presents the on-the-fly diagnosability analysis using verifier nets. For a given LPN model, the verifier net and its reachability graph (for a bounded LPN) or coverability graph (for an unbounded LPN) are built on-the-fly and in parallel for diagnosability analysis. As soon as a diagnosability decision is established, the construction is stopped. This approach achieves a compromise between computation limitations due to efficiency and combinatorial explosion and it is useful to implement an engineering approach to the diagnosability analysis of complex systems.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2018, 28, 2; 269-281
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Graphics Processing Unit for In-Line Electron Holography
Autorzy:
Morawiec, K.
Dłużewski, P.
Kret, S.
Szczepańska, A.
Li, T.
Sloan, J.
Powiązania:
https://bibliotekanauki.pl/articles/1033020.pdf
Data publikacji:
2017-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.37.Lp
68.37.Og
68.55.Nq
42.30.Rx
61.05.jp
07.05.Pj
42.30.-d
42.30.Wb
Opis:
In the present work, software for exit electron wave reconstruction based on the iterative approach was implemented and a new method for drift-correction of the focal series was proposed.
Źródło:
Acta Physica Polonica A; 2017, 131, 5; 1353-1356
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of epitaxial LSMO films grown on STO substrates
Autorzy:
Španková, M.
Štrbík, V.
Chromik, Š.
Zheng, D.
Li, J.
Machajdík, D.
Kobzev, A.
Plecenik, T.
Sojková, M.
Powiązania:
https://bibliotekanauki.pl/articles/1054697.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.37.Ps
75.47.Lx
75.70.Ak
81.15.Fg
Opis:
Epitaxial manganite La_{0.67}Sr_{0.33}MnO₃ (LSMO) layers, with a thickness of 20-50 nm, are prepared on single crystal (001) SrTiO₃ (STO) substrates by pulsed laser deposition technique. Structural characterization (composition analysis, surface morphology), investigated by the Rutherford backscattering spectroscopy and atomic force microscopy, reveals the growth of stoichiometric LSMO films with a smooth surface (root-mean-square value of 0.21-1.6 nm). The prepared LSMO films possess high Curie temperature ( ≈ 412 K), low room temperature resistivity (1-2 mΩ cm) and maximum of temperature coefficient of resistivity TCR = 2.7% K¯¹ at 321 K.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 848-850
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of Rascheltronic Vamp Fabric with Double-Colour Pitting Effect
Projektowanie dzianin dwukolorowych z efektem pittingu
Autorzy:
Li, X.
Zhang, A.
Jiang, G.
Powiązania:
https://bibliotekanauki.pl/articles/232311.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
warp knitting
rascheltronic
vamp fabric
double-colour pitting effect
CAD
projektowanie dzianin dwukolorowych
wspomaganie komputerowe
dzianina
Opis:
Applications of Piezo jacquard and CAD technology in warp-knitting have provided traditional jacquard fabrics with the possibility of innovating the structure design. Research on innovative design and fabrication is conducted aiming at knitting jacquard vamp fabric with the double-colour pitting effect on a technical back. By utilising Piezoelectric jacquard’s performance of displacing both underlapping and overlapping, new structures are formed, such as mesh stitches, koper stitches and float structures. Based on threading with yarns in two colors, jacquard bars in split execution create a pattern with a double-colour effect. To realize a highly efficient design, the paper proposes a computer-aided jacquard design method covering technical parameters and jacquard pattern design modules. Additionally, to pursue convenience and efficiency, mathematic models are built in terms of an automatic borderline design, loop stitching inspection and structure database. The method of jacquard vamp fabric design with a double-color pitting effect has been proven practically by illustrating a vamp design example which meets the requirement of fashion and performance well.
Projektowanie dzianin dwukolorowych z efektem pittingu jest możliwe przy użyciu komputerowego systemu projektowania opartego na specjalnej metodzie dziewiarskiej. Dzięki macierzy i modelowi matematycznemu system obejmuje wszystkie podstawowe parametry techniczne modułów projektowego i kontrolnego oraz modułu bazy danych struktur, które współpracują w celu sprawnego projektowania dzianiny. Na podstawie otrzymanych wyników badań stwierdzono, że wspomagana komputerowo metoda projektowania może być z powodzeniem stosowana w projektowaniu dzianin dwukolorowych z efektem pittingu.
Źródło:
Fibres & Textiles in Eastern Europe; 2017, 3 (123); 92-97
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 73

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