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Wyświetlanie 1-15 z 113
Tytuł:
A Spectral Characterization of the S-Clique Extension of the Triangular Graphs
Autorzy:
Tan, Ying-Ying
Koolen, Jack H.
Xia, Zheng-Jiang
Powiązania:
https://bibliotekanauki.pl/articles/31564711.pdf
Data publikacji:
2020-05-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
co-edge-regular graph
triangular graph
s-clique extension
Opis:
A regular graph is co-edge regular if there exists a constant µ such that any two distinct and non-adjacent vertices have exactly µ common neighbors. In this paper, we show that for integers s ≥ 2 and n large enough, any co-edge-regular graph which is cospectral with the s-clique extension of the triangular graph T (n) is exactly the s-clique extension of the triangular graph T (n).
Źródło:
Discussiones Mathematicae Graph Theory; 2020, 40, 2; 663-676
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Purification and Characterization of a Low Molecular Weight Neutral Non-Starch Polysaccharide from Panax ginseng by Enzymatic Hydrolysis
Autorzy:
Ying, Ying
Ma, Chao
Zhang, Yajie
Li, Xiaoping
Wu, Hongxin
Powiązania:
https://bibliotekanauki.pl/articles/16538536.pdf
Data publikacji:
2023-02-21
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
ginseng polysaccharide
chromatographic separation
monosaccharide composition
structure analysis
Opis:
In this study, a novel neutral non-starch polysaccharide (GP1A) was extracted using hot water from ginseng roots. Chemical characteristics, monosaccharide compositions and structure of GP1A were investigated using scanning electron microscopy, gel permeation chromatography, X-ray diffraction, Fourier transform infrared spectroscopy, gas chromatography with mass spectrometer, one-dimensional and two-dimensional nuclear magnetic resonance. The results indicated that the lyophilized GP1A was a homogeneous polysaccharide with a low molecular weight of 1.03 kDa. The dominating monosaccharides of GP1A were D-glucose, D-galactose, D-mannose, D-xylose and D-arabinose. The structure analysis indicated the main chain residues sequence of GP1A was α-D-Glcp-(6→3)-α-D-Galp-(1→1)-α-D-Glcp-(3→4)-β-D-Manp-(2→2)-β-D-Arap with branch chains of α-D-Glcp substituted at α-D-Galp and β-D-Xylp substituted at β-D-Manp.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2023, 73, 1; 70-79
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maximizing Spectral Radii of Uniform Hypergraphs with Few Edges
Autorzy:
Fan, Yi-Zheng
Tan, Ying-Ying
Peng, Xi-Xi
Liu, An-Hong
Powiązania:
https://bibliotekanauki.pl/articles/31340758.pdf
Data publikacji:
2016-11-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
tensor
spectral radius
unicyclic hypergraph
bicyclic hypergraph
girth
Opis:
In this paper we investigate the hypergraphs whose spectral radii attain the maximum among all uniform hypergraphs with given number of edges. In particular we characterize the hypergraph(s) with maximum spectral radius over all unicyclic hypergraphs, linear or power unicyclic hypergraphs with given girth, linear or power bicyclic hypergraphs, respectively.
Źródło:
Discussiones Mathematicae Graph Theory; 2016, 36, 4; 845-856
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reviewing Studies on Villager Self-government in China: The XiangTu School as an Example
Autorzy:
Xing, Ying
Powiązania:
https://bibliotekanauki.pl/articles/1929566.pdf
Data publikacji:
2009-09-29
Wydawca:
Polskie Towarzystwo Socjologiczne
Tematy:
Villager self-government system
the XiangTu school
governance
sociological imagination
Opis:
The article draws the outline of the studies of villager self-government system in China, then emphatically analyses a typical example, the XiangTu school, most scholars of which are teaching in the Center of China. The article analyses the change of study direction of the XiangTu school. The author points that the theoretical feature of the school is connecting villagers’ autonomy with governance of villages. However, the author criticizes the school for its flaws on the methodology.
Źródło:
Polish Sociological Review; 2009, 167, 3; 427-438
1231-1413
2657-4276
Pojawia się w:
Polish Sociological Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CANADIAN SCENES CD-ROM
Autorzy:
Ying, Fang
Powiązania:
https://bibliotekanauki.pl/articles/569075.pdf
Data publikacji:
2001
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej w Lublinie. IATEFL Poland Computer Special Interest Group
Źródło:
Teaching English with Technology; 2001, 1, 4; 22-26
1642-1027
Pojawia się w:
Teaching English with Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PROMOTING LEARNER AUTONOMY THROUGH CALL PROJECTS IN CHINA’S EFL CONTEXT
Autorzy:
Ying, Fang
Powiązania:
https://bibliotekanauki.pl/articles/569744.pdf
Data publikacji:
2002
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej w Lublinie. IATEFL Poland Computer Special Interest Group
Opis:
"Learner-centered approach" and "Self-directed learning" have been a recent research focus in SLA, but few studies have touched upon how to develop learner autonomy, particularly in a computer-assisted learning environment. The paper first illustrates the importance of promoting learner autonomy in China's EFL context and elaborates the three main factors contributing to its development. Then it focuses on how the CALL research project promotes autonomous learning through a small-scale study in Suzhou University. Both quantitative and qualitative methods have been employed to examine whether in the CALL project learners exercise control over their own learning and evaluate its outcome . The final results indicate that due to a flexible syllabus, highly motivating research topics and the network-assisted environment, learners do take responsibility for most aspects of learning and thus the CALL project proves to be a promising approach for autonomous training.
Źródło:
Teaching English with Technology; 2002, 2, 5; 3-25
1642-1027
Pojawia się w:
Teaching English with Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The inertia of unicyclic graphs and bicyclic graphs
Autorzy:
Liu, Ying
Powiązania:
https://bibliotekanauki.pl/articles/728942.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
matching number
inertia
nullity
unicyclic graph
bicyclic graph
Opis:
Let G be a graph with n vertices and ν(G) be the matching number of G. The inertia of a graph G, In(G) = (n₊,n₋,n₀) is an integer triple specifying the numbers of positive, negative and zero eigenvalues of the adjacency matrix A(G), respectively. Let η(G) = n₀ denote the nullity of G (the multiplicity of the eigenvalue zero of G). It is well known that if G is a tree, then η(G) = n - 2ν(G). Guo et al. [Ji-Ming Guo, Weigen Yan and Yeong-Nan Yeh. On the nullity and the matching number of unicyclic graphs, Linear Algebra and its Applications, 431 (2009), 1293-1301.] proved if G is a unicyclic graph, then η(G) equals n - 2ν(G) - 1, n-2ν(G) or n - 2ν(G) + 2. Barrett et al. determined the inertia sets for trees and graphs with cut vertices. In this paper, we give the nullity of bicyclic graphs ₙ⁺⁺. Furthermore, we determine the inertia set in unicyclic graphs and ₙ⁺⁺, respectively.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2013, 33, 1; 109-115
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Forecasting Yield Curves in an Adaptive Framework
Autorzy:
Chen, Ying
Li, Bo
Powiązania:
https://bibliotekanauki.pl/articles/483285.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
interest rates
functional principal component analysis
local parametric model
Nelson-Siegel model
Opis:
Forecasting yield curves with regime switches is important in academia and financial industry. As the number of interest rate maturities increases, it poses difficulties in estimating parameters due to the curse of dimensionality. To deal with such a feature, factor models have been developed. However, the existing approaches are restrictive and largely based on the stationarity assumption of the factors. This inaccuracy creates non-ignorable financial risks, especially when the market is volatile. In this paper, a new methodology is proposed to adaptively forecast yield curves. Specifically, functional principal component analysis (FPCA) is used to extract factors capable of representing the features of yield curves. The local AR(1) model with time-dependent parameters is used to forecast each factor. Simulation and empirical studies reveal the superiority of this method over its natural competitor, the dynamic Nelson-Siegel (DNS) model. For the yield curves of the U.S. and China, the adaptive method provides more accurate 6- and 12-month ahead forecasts.
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2011, 3, 4; 237-259
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of meso-2,3-dimercaptosuccinic acid, potassium iodide and chlorophyll on lead accumulation in male mice
Autorzy:
Xie, Ying
Zhou, Guifeng
Powiązania:
https://bibliotekanauki.pl/articles/2161936.pdf
Data publikacji:
2017-02-21
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
potassium iodide
lead accumulation
meso-2,3-dimercaptosuccinic acid
chlorophyll
food additives
mice
Opis:
Objectives Lead (Pb) pollution is a serious public health problem all over the world, it especially plays severe damage role in children’s health. Apart from reducing lead-induced damages, the decrease of lead accumulation is also critical. This study has been the first attempt to investigate effects of meso-2,3-dimercaptosuccinic acid (DMSA), potassium iodide (KI) and chlorophyll (Chl) on lead accumulation in male mice. Material and Methods Eighty healthy Kunming male mice were selected and divided randomly into 8 groups. They were treated with lead acetate (PbAc) intraperitoneally, individually and in combination with the DMSA, KI or Chl once daily for 5 days. Meanwhile, the control group was treated with normal saline during the whole exposure period. On 30th day, mice were sacrificed and lead concentrations were detected in the whole blood, livers, kidneys, and testicles of mice by means of the graphite furnace atomic absorption spectrometry. Results In comparison with the control group, lead concentrations increased in mice treated with the PbAc and DMSA, KI and Chl diminished lead accumulation in the whole blood, livers, and kidneys. Chl had specifically the same effects on lead concentrations in the testicles of male mice. Conclusions Potassium iodide and Chl, as food additives, had the same effects as the DMSA to reduce lead accumulation in male mice effectively. Our results provided experimental evidence in vivo for the preventive measures of lead poisoning. Int J Occup Med Environ Health 2017;30(1):87–93
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2017, 30, 1; 87-93
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the proximate composition, amino acid composition and growth-related muscle gene expression in diploid and triploid rainbow trout (Oncorhynchus mykiss) muscles
Autorzy:
Wang, Xuewei
Han, Ying
Powiązania:
https://bibliotekanauki.pl/articles/962627.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
The aim of the present study was to identify differences in the proximate composition, amino acid composition and expression of the muscle growth-related genes myogenic determining factor (MyoD) and myostatin (MSTN) in muscle between diploid and triploid female rainbow trout (Oncorhynchus mykiss) that were reared under the same conditions. The research included two different ages (12- and 16-month) of diploid and triploid rainbow trout. The lipid and protein contents of the triploid fish were significantly higher while their moisture content was significantly lower than those of the diploid fish. The amino acid compositions of the proteins of both diploid and triploid rainbow trout were well balanced. The percentages of total amino acids (WTAA), essential amino acids (WEAA), non-essential amino acids (WNEAA) and delicious amino acids were similar between the triploid and diploid fish. The WEAA to WTAA and WEAA to WNEAA indices were comparable to the reference values of nearly 40% and above 60%, respectively, recommended by the FAO/WHO. According to the amino acid scores, phenylalanine can be described as the first limiting amino acid, and the sum of methionine and cysteine represented the highest protein score in both diploid and triploid rainbow trout. MyoD1 mRNA expression was higher in triploid fish, while MSTN2 mRNA expression was higher in diploid fish. The growth potential was greater in triploid fish than in diploid fish. This study shows that both diploid and triploid rainbow trout are good protein sources; triploid rainbow trout is under further investigation due to presenting higher, balanced nutritional quality and better growth than the diploid fish.
Źródło:
Journal of Elementology; 2017, 22, 4
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of uniform test design in optimizing the flotation reagents of iron anionic reverse flotation circuit
Autorzy:
Hou, Ying
Sobhy, Ahmed
Powiązania:
https://bibliotekanauki.pl/articles/2146945.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
iron oxide
quartz
uniform test design
reverse flotation
optimization
flotation reagents
Opis:
Most iron reserves are low in grade with quartz as the main gangue mineral, and anionic reverse flotation has become the most crucial separation method in the processing plants of iron ore. Thus, a flotation feed sample that is a mixture of low-intensity and high-gradient magnetic separators concentrates was acquired from a processing plant. The sample characterizations with X-ray diffraction (XRD), X-ray fluorescence (XRF), laser particle size analyzer, and mineral liberation analysis (MLA) confirmed that the sample consists of iron oxide as a valuable mineral and quartz as a gangue mineral with adequate liberation degree. In the anionic reverse flotation, the interaction of the flotation reagents with the constituents of the feed makes the flotation a complex system. Thus, the selection and optimization of regent dosages were performed using a uniform experimental design to estimate the optimum separation efficiency. The optimum reagent system was 1.6 kg/Mg starch depressant, 1.0 kg/Mg calcium oxide (lime) activator, and 0.8 kg/Mg TD-II anionic collector. At the optimum, 68.90% iron grade with 92.62% recovery was produced.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 1; 37--49
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Period verification device for ventilation rate standard rods based on a digital thermal flowmeter
Autorzy:
Hu, Jiacheng
Sha, Ying
Cai, Jinhui
Liu, Ying
Liu, Suijun
Powiązania:
https://bibliotekanauki.pl/articles/2052108.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ventilation rate standard rod
period verification
numerical simulation
digital thermal flowmeter
micro-pressure difference adjustment
Opis:
Ventilation rate is a physical index that is strictly controlled during cigarette manufacturing because an abnormal ventilation rate can affect the release of mainstream smoke, tar, and other components harmful to human health. Therefore, the standard rod is used for measuring the ventilation rate, which necessitates accurate and effective periodic inspections. In this study, we designed and built a set of special tobacco ventilation rate standard rods to assess the standard device during its verification period and used a digital thermal flowmeter as the flow standard.We determined the micro-pressure adjustment interval through fluid simulation, and conducted an experimental verification based on the simulation results. At the adjustment point where the differential pressure value was 0 Pa, the period verification device was tested under the standard values of 27.38%, 58.83%, and 71.95%. The results show that the measurement errors of the device are -0.42%, 0.55%, and -0.13% respectively, which all meet the verification regulation requirements and indicate that the device is applicable in practical situations.
Źródło:
Metrology and Measurement Systems; 2022, 29, 1; 231-244
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Międzynarodowy Ranking Uniwersytetów (Academic Ranking of World Universities)- metodologia i problemy
Academic Ranking of World Universities - Methodology and Problems
Autorzy:
Liu, Nian Gai
Cheng, Ying
Powiązania:
https://bibliotekanauki.pl/articles/1365288.pdf
Data publikacji:
2016-02-11
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Opis:
Instytut Szkolnictwa Wyższego (Institute of Higher Education), działający w ramach Shanghai Jiao Tong University, opublikował w Internecie międzynarodowy ranking uniwersytetów (Academic Ranking of World Universities), który odbił się szerokim echem na całym świecie. W rankingu tym szkoły wyższe szereguje się według wyników działalności dydaktycznej i badawczej. Wśród wskaźników stosowanych w rankingu znajdują się m.in. liczba absolwentów oraz pracowników zdobywających prestiżowe nagrody międzynarodowe, często cytowanych badaczy w ważniejszych dziedzinach badań, liczba artykułów publikowanych w wybranych, przodujących czasopismach oraz artykułów uwzględnianych w najważniejszych indeksach cytowań, a także efektywność działania ujęta w przeliczeniu na jedną osobę {performance per capita). Problemy metodologiczne omawiane w niniejszym artykule to m.in. ocena ilościowa i jakościowa, ocena działalności badawczej uczelni oraz oferowanego przez nie kształcenia, różnorodność instytucji szkolnictwa wyższego, język publikacji, kryteria wyboru nagród oraz doświadczenia edukacyjne i zawodowe osób uhonorowanych nagrodami. W artykule omówiono także zagadnienia natury technicznej, takie jak definicja szkoły wyższej, sposób formułowania nazw poszczególnych szkół, kwestia ich fuzji i podziałów, poszukiwanie oraz przypisywanie publikacji do autorów (instytucji).
The Institute of Higher Education at Shanghai Jiao Tong University has published the Academic Ranking of World Universities on the Internet. The ranking has drawn wide attention worldwide. Within the ranking institutions are ranked according to their academic or research performance. Ranking indicators include the alumni and staff winning major International awards, highly cited researchers in major research fields, articles published in selected top journals and articles indexed by major citation indexes, as well as performance per capita. Methodological problems discussed in the article include quantitative versus qualitative evaluation, evaluation of research versus education, variety of institutions, language of publications, selection of awards and studying and working experience of award winners. The article also discusses technical problems such as definition of institutions, name expression of institutions, merging and splitting of institutions, searching and attribution of publications.
Źródło:
Nauka i Szkolnictwo Wyższe; 2005, 2, 26; 7-18
1231-0298
Pojawia się w:
Nauka i Szkolnictwo Wyższe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flotation separation of cassiterite and chlorite using carboxymethyl cellulose as a depressant
Autorzy:
Hu, Yang
Ying, Luo Hong
Zhang, Ying
Wei, Lu Kuan
Hao, Guan Zhen
Powiązania:
https://bibliotekanauki.pl/articles/2175422.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
cassiterite
chlorite
sodium oleate
carboxymethyl cellulose
selective inhibition
Opis:
The nature and mechanism of interaction between carboxymethyl cellulose (CMC) with cassiterite (and chlorite surfaces) and their effects on the flotation separation process of cassiterite (from chlorite) were investigated by micro-flotation tests, surface adsorption experiments, zeta potential measurements, solution chemical calculation, infrared spectroscopy, and X-ray photo-electron spectroscopy (XPS). The results from single mineral tests revealed that CMC exhibited good selective inhibition effects with cassiterites and chlorites. When the dosage was 12.5 mg/L at pH 8, cassiterite and chlorite recovery was 92.2% and 6.3%, respectively. The artificial mixed ore test revealed that the flotation separation effect was the best when the dosage of CMC was 6.5 mg/L. Cassiterite used during the studies was 75.1% pure. The recovery was 82.8%. The interaction between CMC and the cassiterite surface led to a shift in the zeta potential toward the negative direction. CMC was weakly adsorbed on the cassiterite surface. There was no significant impact on the subsequent collection of sodium oleate. The concentration of C atom increased post interaction, and the potential shifted toward the negative direction. Characteristic CMC peaks were observed at this point. Hydrogen bonds and weak chemisorption interactions between CMC and chlorite affected the interaction between sodium oleate and the chlorite surface. It also affected the flotation results. The cassiterite and chlorite were separated effectively.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 6; art. no. 155141
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 113

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