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Wyświetlanie 1-15 z 61
Tytuł:
Theoretical analytical solution of deformation and stress distribution of underground gas storage cavern in bedded salt rock
Autorzy:
Xie, P.
Wen, H. J.
Wang, G. J.
Hu, J.
Powiązania:
https://bibliotekanauki.pl/articles/230968.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
złoża soli kamiennej
analiza teoretyczna
funkcja wypierania Love'a
zasada zgodności sprężysto-lepkosprężystej
różnica skończona trójwymiarowa wyraźna
bedded salt rock
theoretical analysis
Love displacement function
elastic-viscoelastic correspondence principle
three-dimensional explicit finite-difference
Opis:
The main purpose of the study is to investigate the mechanical properties around an underground gas storage cavern in bedded salt rock. Firstly, considering the characteristics of the salt rock formation in China, the mechanical model was simplified into a hollow cylinder, which containing non-salt interlayer. In terms of elastic theory, Love displacement function was developed, and the elastic general solution of stress and deformation components were obtained after determining the undetermined coefficients. Under the same condition, numerical simulation was carried out. The validity of the elastic general solution is verified by comparing to numerical simulation results. Furthermore, Based on the feasible general elastic solution, viscoelastic solution was obtained through Laplace transformation and inverse Laplace transform, which could provide reference for the study on the stability and tightness of underground gas storage carven during operation to some extent.
Źródło:
Archives of Civil Engineering; 2018, 64, 4/I; 37-53
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new strategy: high level expression and immunogenicity analysis of triplicate repeated multigenes in Mycoplasma hyopneumoniae
Autorzy:
Li, J.
Wang, G.
Powiązania:
https://bibliotekanauki.pl/articles/16647587.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
multi-epitope fusion protein
Mycoplasma hyopneumoniae
new generation vaccines
Opis:
Highly immunogenic nucleotide fragments from 3 genes of Mycoplasma hyopneumoniae strain 232 were selected using information software technology. After repeating each fragment three times, a total of 9 nucleotide fragments were joined together to form a new nucleotide sequence called Mhp2321092bp. Mhp2321092bp was directly synthesized and cloned into a pET100 vector and expressed in Escherichia coli. After purification, the proteins were successfully validated by SDS-PAGE and Western blotting using mouse His-tag antibody and pig anti-Mhp serum. BALB/c mice were intraperitoneally injected with purified proteins in the high-dose (100 µg), medium-dose group (50 µg) and low-dose (10 µg) groups. Mice in each group were injected on day 1, day 8 and day 15 of feeding, respectively. Serum samples were collected from all mice on the day before immunization and on day 22 after immunization. The antibody level in the mouse serum was detected using western blotting using purified expressed proteins as antigens. IL-2, TNF-α and IFN-γ were simultaneously detected in the mouse serum by ELISA. The results showed that the 60 kDa protein was successfully expressed and reacted specifically with the specific serum Mhp His-Tag mouse monoclonal antibody and pig anti-Mhp serum. From day 0 to day 22 of immunization, IFN-γ increased from 269.52 to 467.74 pg/mL, IL-2 increased from 14.03 to 145.16 pg/mL, and TNF-α increased from 6.86 to 12.37 pg/mL. The IgG antibody in mice increased significantly from 0 day to day 22 after immunization. This study suggests that the expressed recombinant protein may serve as one of the novel vaccine candidates for Mhp.
Źródło:
Polish Journal of Veterinary Sciences; 2023, 26, 2; 275-283
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of soil settlement prediction and its application in large-scale marine reclamation artificial island project
Autorzy:
Zhao, J.
Bao, L.
Wang, G.
Powiązania:
https://bibliotekanauki.pl/articles/259183.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
microstructure
consolidation
creep
artificial island
settlement
Opis:
In an artificial island construction project based on the large-scale marine reclamation land, the soil settlement is a key to affect the late safe operation of the whole field. To analyze the factors of the soil settlement in a marine reclamation project, the SEM method in the soil micro-structural analysis method is used to test and study six soil samples such as the representative silt, mucky silty clay, silty clay and clay in the area. The structural characteristics that affect the soil settlement are obtained by observing the SEM charts at different depths. By combining numerical calculation method of Terzaghi’s one-dimensional and Biot’s two-dimensional consolidation theory, the one-dimensional and two-dimensional creep models are established and the numerical calculation results of two consolidation theories are compared in order to predict the maximum settlement of the soils 100 years after completion. The analysis results indicate that the micro-structural characteristics are the essential factor to affect the settlement in this area. Based on numerical analysis of one-dimensional and two-dimensional settlement, the settlement law and trend obtained by two numerical analysis method is similar. The analysis of this paper can provide reference and guidance to the project related to the marine reclamation land.
Źródło:
Polish Maritime Research; 2017, S 3; 4-11
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of consolidation settlement and creep deformation of artificial island revetment structure in a large-scale marine reclamation land project
Autorzy:
Zhao, J.
Zhou, T.
Wang, G.
Powiązania:
https://bibliotekanauki.pl/articles/258848.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
marine reclamation land
Soft-Soil-Creep model
consolidation settlement
pore pressure
micro-structure
numerical analysis
Opis:
In order to analyze the influential factors of soft foundation settlement in a marine reclamation land project, the consolidation settlement and pore pressure dissipation of the entire area are numerically simulated using Soft-SoilCreep Model, in which the PLAXIS finite element software for professional geotechnical engineering is applied and empirical data of Japanese Kansai’s airport project are used. Moreover, the figures of settlement and pore pressure results in the different basic period are drawn, and the corresponding analysis conclusions are obtained based on the comparison among the results from the computational parameters of depth. In addition,, the influence rules of various parameters on settlement results is concluded through running the parameter sensitivity analysis in Soft-Soil-Creep Model, and the experience and conclusions can be for reference in the design and con-struction of similar large-scale marine reclamation land project. Also the empirical value method of the creep index has not been applied widely. Further research needs to be done.
Źródło:
Polish Maritime Research; 2015, S 1; 35-42
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of vinasse and silica mud on the performance of thermophilic fermentation of brewery sludge from brewery waste substrates
Autorzy:
Xin, Y.
Shen, J.
Wang, B.
Zhu, X.
Wang, Y.
Wang, G.
Chen, Q.
Powiązania:
https://bibliotekanauki.pl/articles/950042.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
brewery waste
anaerobic digestion
thermophilic fermentation
odpady browarnicze
fermentacja beztlenowa
fermentacja termofilna
Opis:
The anaerobic digestion of mixing brewery sludge with vinasse and silica mud at various ratios under thermophilic conditions was explored. Vinasse, silica mud and beer sludge (the sludge from the treatment of beer wastewater) are the main solid wastes of the beer production. Uncontrolled decom-position of these wastes could cause large-scale contamination of soil, water, and air. The results of the investigation showed that the optimal ratio of beer sludge and vinasse was 1:1 under total solids of 10%, producing the highest amount of gas of 1.34 cm3/g within 24 h and 4.06 cm3/g in 10 days. The silica mud weakened the fermentation process and reduced the gas production, and the concentration of total organic carbon, total nitrogen and volatile solids decreased during the digestion. For the mixture of brewery sludge and vinasse, the content of the total organic matter in the biogas manure was more than 60% and the value of pH was 6.5 after the anaerobic digestion, indicating that the manure can be used as an organic fertilizer.
Źródło:
Environment Protection Engineering; 2017, 43, 2; 119-127
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphology and developmental traits of the trilobite Changaspis elongata from the Cambrian Series 2 of Guizhou, South China
Autorzy:
Du, G.-Y.
Peng, J.
Wang, D.-Z.
Wang, Q.-J.
Wang, Y.-F.
Zhang, H.
Powiązania:
https://bibliotekanauki.pl/articles/22906.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
The morphology and ontogeny of the trilobite Changaspis elongata based on 216 specimens collected from the Lazizhai section of the Balang Formation (Stage 4, Series 2 of the Cambrian) in Guizhou Province, South China are described. The relatively continuous ontogenetic series reveals morphological changes, and shows that the species has seventeen thoracic segments in the holaspid period, instead of the sixteen as previously suggested. The development of the pygidial segments shows that their number gradually decreases during ontogeny. A new dataset of well-preserved specimens offers a unique opportunity to investigate developmental traits after segment addition is completed. The ontogenetic size progressions for the lengths of cephalon and trunk show overall compliance with Dyar’s rule. As a result of different average growth rates for the lengths of cephalon, trunk and pygidium, the length of the thorax relative to the body shows a gradually increasing trend; however, the cephalon and pygidium follow the opposite trend. Morphometric analysis across fourteen post-embryonic stages reveals growth gradients with increasing values for each thoracic segment from anterior to posterior. The reconstruction of the development traits shows visualization of the changes in relative growth and segmentation for the different body parts. The new dataset and growth gradient of the trunk suggest that the thoracic segment growth dynamics of early Cambrian to Silurian trilobites follow the same general continuous, steady-state growth gradient decreasing from posterior to anterior.
Źródło:
Acta Palaeontologica Polonica; 2019, 64, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Health index synthetization and remaining useful life estimation for turbofan engines based on run-to-failure datasets
Synteza wskaźników stanu technicznego oraz ocena pozostałego okresu użytkowania silników turbowentylatorowych z wykorzystaniem zbiorów danych o pracy do czasu uszkodzenia
Autorzy:
Shi, J.
Li, Y.
Wang, G.
Li, X.
Powiązania:
https://bibliotekanauki.pl/articles/301447.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
hierarchical clustering
relevance vector machine
run-to-failure
remaining useful life
health indices
prognostics
grupowanie hierarchiczne
maszyna wektorów istotnych
praca do czasu uszkodzenia
pozostały okres użytkowania
wskaźnik stanu technicznego
prognostyka
Opis:
Turbofan engines will gradually degrade until failure occurs or life ends if without maintenance. Reliable degradation assessment and remaining useful life (RUL) estimation make sense on both aviation safety and rational maintenance decisions. This paper proposes a data-driven prognostic method on the premise of run-to-failure (RtF) data which are multivariate sensory data collected from the engines operating from normal to failure. After necessary pre-processing to the data, clustering analysis is executed to generate the clusters which represent the multi-states of the degradation process. The failure state cluster is extracted, and then the distance between the pre-processed data and the cluster is calculated. Therefore, one-dimensional time series are generated and defined as the health indices. Afterwards the degradation models are built based on the health indices. Finally, the RUL of a testing unit can be estimated by similarity analysis with the models. Hierarchical clustering (HC) and relevance vector machine (RVM) are the main algorithms employed in this paper. To validate the proposition, a case study is performed on turbofan engines data from Prognostics Center of Excellence (PCoE) at NASA Ames Research Center, and sufficient comparisons were given.
Silniki turbowentylatorowe niepoddane konserwacji ulegają stopniowej degradacji aż do czasu wystąpienia uszkodzenia lub zakończenia cyklu życia. Rzetelna ocena degradacji oraz pozostałego okresu użytkowania (RUL) mają wpływ zarówno na bezpieczeństwo maszyn lotniczych jak i racjonalne podejmowanie decyzji dotyczących utrzymania ruchu. W artykule zaproponowano sterowaną danymi metodę prognostyczną opartą na danych o pracy do czasu uszkodzenia (run-to failure, RTF), które są wielowymiarowymi danymi sensorycznymi zbieranymi podczas normalnej pracy silnika aż do jego uszkodzenia. Po niezbędnej wstępnej obróbce danych, przeprowadzono analizę skupień w celu wygenerowania skupień reprezentujących multi-stany procesu degradacji. Wyodrębniono klaster stanów uszkodzenia, a następnie obliczono odległość między wstępnie przetworzonymi danymi a wyodrębnionym klastrem. Następnie wygenerowano jednowymiarowe szeregi czasowe, które zdefiniowano jako wskaźniki stanu technicznego. Na podstawie tych wskaźników zbudowano modele degradacji. Wreszcie, w oparciu o analizę podobieństwa do opracowanych modeli oceniono RUL jednostki testowej. Główne algorytmy zastosowane w niniejszym opracowaniu to algorytmy grupowania hierarchicznego (HC) oraz maszyny wektorów istotnych (RVM). Aby zweryfikować zaproponowaną w pracy metodę, przeprowadzono studium przypadku z wykorzystaniem danych dot. silników turbowentylatorowych pochodzące z Prognostic Center of Excellence (PCoE) przy NASA Ames Research Center oraz przedstawiono odpowiednie porównania.
Źródło:
Eksploatacja i Niezawodność; 2016, 18, 4; 621-631
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel lectin with antiproliferative activity from the medicinal mushroom Pholiota adiposa
Autorzy:
Zhang, G.
Sun, J.
Wang, H.
Ng, T.
Powiązania:
https://bibliotekanauki.pl/articles/1040531.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Pholiota adiposa
lectin
mushroom
purification
antiproliferative
Opis:
Little was known about biological activities of compounds from the medicinal mushroom of the genus Pholiota. A lectin from the Pholiota adiposa has now been isolated and its properties tested. The isolation procedure included ion exchange chromatography on DEAE-cellulose and CM-cellulose, and fast protein liquid chromatography-gel filtration (FPLC) on Superdex 75. The lectin was composed of two identical subunits, each with a molecular mass of 16 kDa. Its N-terminal amino-acid sequence showed little similarity to sequences of other Agaricales lectins. The hemagglutinating activity of the lectin was stable at temperatures up to 50°C, and in NaOH and HCl solutions with concentrations less than 25 mM. It was inhibited by inulin (12.5-200 mM), but enhanced by Cu2+ (6.25-25 mM), Fe2+ (12.5-25 mM), and Al3+ (6.25-25 mM) ions. The lectin showed antiproliferative activity toward hepatoma Hep G2 cells and breast cancer MCF7 cells with an IC50 of 2.1 µM and approximately 3.2 µM, respectively. It exhibited HIV-1 reverse transcriptase inhibitory activity with an IC50 of 1.9 µM. When compared with P. aurivella lectin, the only Pholiota lectin published to date, P. adiposa lectin differs in chromatographic behavior, molecular mass, N-terminal sequence, and effect of cations on hemagglutinating activity. In the case of the lectin from P. aurivella, its antifungal, antiproliferative, and HIV-1 reverse transcriptase inhibitory activities have not been determined.
Źródło:
Acta Biochimica Polonica; 2009, 56, 3; 415-421
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on Fluorescence Characteristic of a Complex Probe οf CdSe Quantum Dots Coupling with Thiazole Orange
Autorzy:
Fei, X.
Jia, G.
Wang, J.
Gu, Y.
Powiązania:
https://bibliotekanauki.pl/articles/1537765.pdf
Data publikacji:
2010-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.63.Kv
78.55.-m
78.67.-n
Opis:
CdSe quantum dots were synthesized using thioglycolic acid as stabilizer in aqueous solution under $N_{2}$. The UV-vis spectrometry and fluorescence spectra indicate that the bimodal quantum dots were formed and the optical band gaps are about 650 nm and 750 nm, respectively. The quantum dots coated with TO were prepared in room temperature, and the fluorescence characteristic was studied. The result showed that the peak shift of quantum dots fluorescence spectra can mainly be due to the change of the capping layer, resulting in the confinement energy change. This is vital for the investigating on of the forming process and mechanisms of the combination of thiazole orange dye and quantum dots.
Źródło:
Acta Physica Polonica A; 2010, 117, 6; 949-952
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New bird remains from the Middle Eocene of Guangdong, China
Autorzy:
Wang, M.
Mayr, G.
Zhang, J.
Zhou, Z.
Powiązania:
https://bibliotekanauki.pl/articles/21279.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
new taxon
bird
remains
Middle Eocene
Guangdong Province
China
Aves
Ciconiiformes
Threskiornithidae
Eocene
fossil record
fossil bird
paleontology
Sanshuiornis zhangi
Huayong Formation
Opis:
We describe a new avian taxon (Sanshuiornis zhangi gen. et sp. nov.) from Middle Eocene black oil shales in the Huayong Formation of Guangdong Province, south China. The specimen consists of a distal tibiotarsus and a complete foot with tarsometatarsus and pedal digits in articulation. A preliminary phylogenetic analysis does not resolve the affinities of the fossil, but the bones show resemblances to some “ciconiiform” birds. The peculiar hypotarsus morphology, which is block−like and exhibits four cristae, resembles that of the early Eocene Rhynchaeites, which is a stem group representative of the Threskiornithidae. The new Chinese fossil has, however, proportionally longer legs than Rhynchaeites and its phylogenetic affinities probably cannot be resolved without further material.
Źródło:
Acta Palaeontologica Polonica; 2012, 57, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Convergence Analysis of Multilayer Feedforward Networks Trained with Penalty Terms: A review
Autorzy:
Wang, J.
Yang, G.
Liu, S.
Zurada, J. M.
Powiązania:
https://bibliotekanauki.pl/articles/108639.pdf
Data publikacji:
2015
Wydawca:
Społeczna Akademia Nauk w Łodzi
Tematy:
Gradient
feedforward neural networks
generalization
penalty
convergence
pruning algorithms
Opis:
Gradient descent method is one of the popular methods to train feedforward neural networks. Batch and incremental modes are the two most common methods to practically implement the gradient-based training for such networks. Furthermore, since generalization is an important property and quality criterion of a trained network, pruning algorithms with the addition of regularization terms have been widely used as an efficient way to achieve good generalization. In this paper, we review the convergence property and other performance aspects of recently researched training approaches based on different penalization terms. In addition, we show the smoothing approximation tricks when the penalty term is non-differentiable at origin.
Źródło:
Journal of Applied Computer Science Methods; 2015, 7 No. 2; 89-103
1689-9636
Pojawia się w:
Journal of Applied Computer Science Methods
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Expression and immunogenicity study of a novel mhp183 gene fragment of Mycoplasma hyopneumoniae
Autorzy:
Xu, M.
Zheng, J.
Hu, S.
Wang, G.
Powiązania:
https://bibliotekanauki.pl/articles/2087132.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Mycoplasma hyopneumoniae
Mhp183 gene
new generation vaccines
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 4; 553-561
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical Prosperities of Ag-ZnO Composition Nanofilm Synthesized by Chemical Bath Deposition
Autorzy:
Wang, Y.
Yao, J.
Jia, G.
Lei, H.
Powiązania:
https://bibliotekanauki.pl/articles/1505423.pdf
Data publikacji:
2011-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.15.Lm
78.66.Hf
78.55.Et
68.37.Hk
Opis:
Ag-ZnO composite thin films were prepared on glass substrates by chemical bath deposition at lower temperature. The samples were characterized by X-ray diffraction, scanning electron microscopy, photoluminescence and the optical transmission spectra. The morphology analysis showed that Ag nanoparticles were not deposited on the ZnO nanorods surface but on the glass substrate. The influence of the reaction time on the size and density of Ag nanoparticles was studied, the results showed that the reaction time played an important role in determining of the optical characteristics. There were two obvious photoluminescence peaks located at about 395 nm and 471 nm, respectively. The blue emission centered at 471 nm can be ascribed to the electron transition from $Zn_{i}$ to $V_{Zn}$.
Źródło:
Acta Physica Polonica A; 2011, 119, 3; 451-454
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The least eigenvalue of the graphs whose complements are connected and have pendent paths
Autorzy:
Wang, C.
Yu, G.
Sun, W.
Cao, J.
Powiązania:
https://bibliotekanauki.pl/articles/91753.pdf
Data publikacji:
2018
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
graph
complement
pendent path
adjacency matrix
least eigenvalue
Opis:
The adjacency matrix of a graph is a matrix which represents adjacent relation between the vertices of the graph. Its minimum eigenvalue is defined as the least eigenvalue of the graph. Let Gn be the set of the graphs of order n, whose complements are connected and have pendent paths. This paper investigates the least eigenvalue of the graphs and characterizes the unique graph which has the minimum least eigenvalue in Gn.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2018, 8, 4; 303-308
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical Analysis of the TE Mode Cerenkov Type Second Harmonic Generation in Ion-Implanted X-Cut Lithium Niobate Planar Waveguides
Autorzy:
Du, G.
Li, G.
Zhao, S.
Qiao, W.
Yang, K.
An, J.
Li, M.
Wang, J.
Wang, W.
Powiązania:
https://bibliotekanauki.pl/articles/1808109.pdf
Data publikacji:
2009-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.72.Dd
42.82.Et
Opis:
We present a study of the Cerenkov configuration second harmonic generation in X-cut ion-implanted lithium niobate waveguides. An approximate solution of conversion efficiency is given and plotted which shows that it is very sensitive to the waveguide depth and pump wavelength. The results can be used in the design of waveguides for the efficient second harmonic generation in the Cerenkov configuration.
Źródło:
Acta Physica Polonica A; 2009, 115, 3; 685-689
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
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