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Tytuł:
The Rule for Evolution of Cooperation in Quantum Games
Autorzy:
Sun, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1807768.pdf
Data publikacji:
2009-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
02.50.Le
03.67.-a
87.23.-n
Opis:
Cooperation is essential to biological organizations and human society. In this paper, the conditions of dilemmas resolving by quantum strategies in the three games, Prisoners' Dilemma, Chicken Game and Stag Hunt, are presented. The rule for the evolution of cooperation in general quantum games, b/c > $coth^{2}γ$, is put forward. The formation of the rule is similar to those of the five rules in the classical game theory summarized by Nowak. b/c is still the benefit-to-cost ratio of the altruistic act, while γ is a measure for the game's entanglement. The rule is the prerequisite for the realization of cooperation in quantum games.
Źródło:
Acta Physica Polonica A; 2009, 116, 2; 135-140
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and performance of the converging-diverging vortex flowmeter
Autorzy:
Sun, Z.
Powiązania:
https://bibliotekanauki.pl/articles/221011.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
vortex flowmeter
converging-diverging structure
lower limit of measurement
Strouhal number
drag coefficient
Opis:
The converging-diverging structure is introduced to extend the lower limit of measurement of vortex flowmeters. As a compact device, the converging-diverging vortex flowmeter is proposed and designed, and its performance is studied experimentally. It is found that, first of all, an up to 51% extension of the lower measurement limit can be realized through the converging-diverging structure, compared with conventional vortex flowmeters; second, the converging-diverging vortex flowmeter with a trapezoidal bluff body has a larger Strouhal number and smaller pressure loss. The results suggest that the converging-diverging vortex flowmeter provides an alternative device especially suitable for the measurement of low-velocity fluids.
Źródło:
Metrology and Measurement Systems; 2011, 18, 1; 129-136
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On Board Condition Monitoring of Feed Axes by Signal Decomposition for Machines with Ball Screw Drives
Autorzy:
Maier, D.
Sun, Z.
Powiązania:
https://bibliotekanauki.pl/articles/971168.pdf
Data publikacji:
2009
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
signal analysis
feed drive
wear
Opis:
In order to establish a condition monitoring system to detect wear of the mechanical components of feed drives with ball screws a measuring and data evaluation method has been established. In order to keep the costs down, boundary condition is to use the machines own functionalities only (On Board Diagnosis). At present, most of wear detecting methods use vibration analysis. Here, a signal analysis method is presented that may well complement established methods of vibration analysis. The publication presents a method to exploit positioning data to detect wear of a ball screw drive exemplarily that is run under real conditions. The presented method is partially derived from wear detection methods of roller bearings and may also be adapted for other parts such as linear guides.
Źródło:
Journal of Machine Engineering; 2009, 9, 3; 42-63
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of surface plasmon wave interference on near-field imaging on metal nanostructures with apertured probe
Autorzy:
Yang, Y.
Sun, Z.
Powiązania:
https://bibliotekanauki.pl/articles/173847.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
near-field
surface plasmon
metal
nanostructure
Opis:
We numerically studied artifact issues on near-field imaging of field intensity on metal nanostruc-tures (isolated ridges and slits in a continuous film) with an apertured probe. It is shown for the latter case that the interaction between neighboring slits via propagating surface plasmon waves (e.g., surface plasmon wave interferences) makes the probe-imaged field intensity highly condi-tional in reflection of the unperturbed field. As surface plasmon behaviors and probe imaging processes are polarization-sensitive and the field components are correlated, a model analysis of the partial field components elucidates their relations, which can help to derive the unperturbed near-field image from the probed one.
Źródło:
Optica Applicata; 2013, 43, 3; 615-626
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy of intrinsic mode function for gas-liquid flow pattern identification
Autorzy:
Sun, Z.
Gong, H.
Powiązania:
https://bibliotekanauki.pl/articles/221137.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
gas-liquid flow pattern
flow-pattern map
pressure fluctuation
bluff body
signal energy
intrinsic mode function
empirical mode decomposition
Opis:
Gas-liquid flows abound in a great variety of industrial processes. Correct recognition of the regimes of a gas-liquid flow is one of the most formidable challenges in multiphase flow measurement. Here we put forward a novel approach to the classification of gas-liquid flow patterns. In this method a flow-pattern map is constructed based on the average energy of intrinsic mode function and the volumetric void fraction of gas-liquid mixture. The intrinsic mode function is extracted from the pressure fluctuation across a bluff body using the empirical mode decomposition technique. Experiments adopting air and water as the working fluids are conducted in the bubble, plug, slug, and annular flow patterns at ambient temperature and atmospheric pressure. Verification tests indicate that the identification rate of the flow-pattern map developed exceeds 90%. This approach is appropriate for the gas-liquid flow pattern identification in practical applications.
Źródło:
Metrology and Measurement Systems; 2012, 19, 4; 759-766
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of water flows on ship traffic in narrow water channels based on cellular automata
Autorzy:
Hu, H.
Chen, X.
Sun, Z.
Powiązania:
https://bibliotekanauki.pl/articles/260068.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
narrow channel
cellular automata
simulation
ship interaction
Opis:
In narrow water channels, ship traffic may be affected by water flows and ship interactions. Studying their effects can help maritime authorities to establish appropriate management strategies. In this study, a two-lane cellular automation model is proposed. Further, the behavior of ship traffic is analyzed by setting different water flow velocities and considering ship interactions. Numerical experiment results show that the ship traffic density-flux relation is significantly different from the results obtained by classical models. Furthermore, due to ship interactions, the ship lane-change rate is influenced by the water flow to a certain degree.
Źródło:
Polish Maritime Research; 2017, S 3; 130-135
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new middle Cambrian trilobite with a specialized cephalon from Shandong Province, North China
Autorzy:
Sun, Z.
Zeng, H.
Zhao, F.
Powiązania:
https://bibliotekanauki.pl/articles/2082242.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Trilobita
Ptychopariida
ontogeny
specialization
Miaolingian
Paleozoic
Longgang
Asia
Opis:
Trilobites achieved their maximum generic diversity in the Cambrian, but the peak of morphological disparity of their cranidia occurred in the Middle to Late Ordovician. Early to middle Cambrian trilobites with a specialized cephalon are rare, especially among the ptychoparioids, a group of libristomates featuring the so-called “generalized” bauplan. Here we describe an unusual ptychopariid trilobite Phantaspis auritus gen. et sp. nov. from the middle Cambrian (Miaolingian, Wuliuan) Mantou Formation in the Shandong Province, North China. This new taxon is characterized by a cephalon with an extended anterior area of double-lobate shape resembling a pair of rabbit ears in later ontogenetic stages; a unique type of cephalic specialization that has not been reported from other trilobites. Such a peculiar cephalon as in Phantaspis provides new insights into the variations of cephalic morphology in middle Cambrian trilobites, and may represent a heuristic example of ecological specialization to predation or an improved discoidal enrollment.
Źródło:
Acta Palaeontologica Polonica; 2020, 65, 4; 709-718
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hemodynamic impacts of left coronary stenosis : a patient-specific analysis
Autorzy:
Chaichana, T.
Sun, Z.
Jewkes, J.
Powiązania:
https://bibliotekanauki.pl/articles/306747.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
coronary artery disease
computational fluid dynamics (CFD)
wall shear stress
tętnica wieńcowa
dynamika cieczy
naprężenie
Opis:
This study analyses the hemodynamic variations surrounding stenoses located at the left coronary bifurcation, and their influence on the wall shear stress (WSS) in realistic coronary geometries. Four patients with suspected coronary artery disease were chosen, and coronary models were reconstructed based on high-resolution CT data. The coronary stenoses were observed at the left circumflex and left anterior descending branches, resulting in a lumen narrowing of >50%. Flow analysis was performed using computational fluid dynamics, to simulate the cardiac flow conditions of the realistic individual patient geometry. Blood flow and WSS changes in the left coronary artery were calculated throughout the entire cardiac phases. Our results revealed that the recirculation regions were found at the poststenotic locations. WSS was found to increase at the stenotic positions in all four patients. There is a strong correlation between coronary stenosis and the hemodynamic changes, which are reflected in blood flow pattern and WSS, based on the realistic left coronary geometries.
Źródło:
Acta of Bioengineering and Biomechanics; 2013, 15, 3; 107-111
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical purification of diatomite based on laminar-flow centrifugal separation
Autorzy:
Yang, X.
Sun, Z.
Zheng, S.
Powiązania:
https://bibliotekanauki.pl/articles/109881.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
diatomite
physical purification
laminar-flow centrifugal separation
response surface experiment
Opis:
Natural diatomaceous earth or diatomite of good quality becomes rare and a demand for it increases every year. In this paper, we develop a novel method based on laminar-flow centrifugal separation to purify mid- and low-grade diatomite for industrial production purposes. Effects of the drum cone angle, drum speed, feeding concentration, feeding flow rate and feeding time on separation were investigated experimentally. The interdependency of these variables was studied using a response surface experiment. Operating conditions of a laminar-flow centrifugal separator were further optimized. Results showed that the feeding flow rate had a great influence on a silicon dioxide content of diatomaceous in concentrate and tailing. The optimal separation results were achieved as 87.5 wt.%, of SiO2 content of diatomaceous in concentrate and 6.98 wt.% in tailing. The optimal operating conditions included the drum cone angle of 0.0087 rad, the drum speed of 89.62 rad/s, the feeding concentration of 24.66 wt.%, the feeding flow rate of 2.33×10–4 m3/s, and the feeding time of 90 s. A scanning electron microscopy (SEM) clearly indicated that the pore blockage on the surface of diatoms was cleared out. The variation about the breakage rate of diatom shells was lower than 5% through the pilot purification production line. The characterization of original diatomite and derived products after purification were determined by X-ray diffraction (XRD). The results indicated that the impurity content of purified diatomite was improved significantly.
Źródło:
Physicochemical Problems of Mineral Processing; 2014, 50, 2; 705-718
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Silicified Anisian [Middle Triassic] spiriferinid brachiopods from Guizhou, South China
Autorzy:
Sun, Z
Hao, W.
Sun, Y.
Jiang, D.
Powiązania:
https://bibliotekanauki.pl/articles/20730.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Triassic
brachiopod
paleontology
China
Anisian
Middle Triassic
Spiriferinida
Brachiopoda
Guanling Formation
spiriferinid brachiopod
Opis:
A newly discovered silicified brachiopod interval from the Upper Member of the Guanling Formation (Late Anisian, Middle Triassic) in Guizhou Province (South China) is described for the first time. The most remarkable feature of this brachiopod assemblage, besides the very good preservation, is the very low taxonomic evenness and diversity. This impoverished, low diversity/high density assemblage is represented by more than 700 recovered specimens belonging to three species within two spiriferinid genera (Pseudospiriferina multicostata, P. pinguis, and Punctospirella fragilis). It is characterized by the overwhelming abundance of an endemic spiriferinid species, P. multicostata, which contributes to more than 90% of the community. Silicified valves of P. multicostata and Punctospirella fragilis allow detailed descriptions of the internal morphology based on direct observation. Brachiopod paleoecology, assessed by considering host−rock lithology, shell disarticulation, and shell size suggests that this endemic brachiopod fauna represents a favourable niche for development of dense brachiopod−dominated communities, i.e., high energy, hard substrate, nutrient rich environment.
Źródło:
Acta Palaeontologica Polonica; 2009, 54, 1; 61-68
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on Mechanism Analysis and Elimination Method for the Tufted Carpet Stop Mark
Badanie mechanizmu i metody eliminacji śladów zatrzymania maszyny wytwarzającej dywany wiązane
Autorzy:
Xu, Y.
Sun, Z.
Meng, Z
Sun, Y.
Powiązania:
https://bibliotekanauki.pl/articles/232304.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
creep property
stop mark
tufted carpet
yarn path
yarn tension
dywany wiązane
zatrzymanie pracy maszyny
pełzanie przędzy
maszyna wiążąca
Opis:
The tufted carpet stop mark is an important factor affecting carpet final quality. It is closely related to the change in yarn tension caused by the tufting machine being improperly stopped and the yarn creep properties. The purpose of this paper is to develop a reasonable approach to eliminate the tufted carpet stop mark. Focusing on a typical tufting machine, the tufting equipment system and basic working principle of tufted carpet are briefly described. A yarn path flexing model which integrates yarn feeding parts, yarn guiders and the tufting needle for a typical tufting process is constructed. The yarn tension change is analysed along with the change in the yarn path. A Polypropylene yarn four-component model is used for analysing the relationship between tension and yarn creep properties. The creep property of polypropylene yarn under a certain tension is verified by experiments. According to the yarn tension change in different running positions of the tufting needle, a reasonable method of eliminating the stop mark which stops and restarts the machine in the highest position is put forward. Finally the experimental results prove that the method is effective and feasible.
Ślady zatrzymania pracy maszyn wiążących dywany są ważnym czynnikiem wpływającym na jakość produktu końcowego. Jest to ściśle związane ze zmianą w naprężeniu przędzy spowodowanym przez maszynę wiążącą nieodpowiednio zatrzymaną oraz właściwości pełzania przędzy. Celem pracy było opracowanie metody pozwalającej wyeliminowanie tego zjawiska. W pracy rozważono typową maszynę wiążącą, system wiązania i zasady wiązania dywanów. Opracowano model drogi włókna integrujący elementy prowadzące oraz igły wiążące dla przedstawienia typowego procesu wiązania. Analizowano zmiany naprężenia przędzy wzdłuż jej drogi. Dla przędzy polipropylenowej zastosowano czteroskładnikowy model pozwalający na analizę zależności pomiędzy naprężeniem i pełzaniem przędzy. Właściwości pełzania przędzy polipropylenowej pod określonym naprężeniem zostały zweryfikowane eksperymentalnie. W efekcie opracowano metodę eliminacji śladów zatrzymania, która pozwoliła na efektywną realizację i została sprawdzona doświadczalnie.
Źródło:
Fibres & Textiles in Eastern Europe; 2014, 3 (105); 66-72
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic Characteristic Analysis of the Needle Multi-linkage Mechanism in a Carpet Tufting Machine’s Driving System
Analiza charakterystyki dynamicznej mechanizmu napędzającego system igłowy w maszynie do produkcji dywanów
Autorzy:
Xu, Y.
Sun, Z.
Huang, S.
Sheng, X.
Chi, X.
Powiązania:
https://bibliotekanauki.pl/articles/232022.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
carpet tufting machine
needle multi-linkage mechanism
kinematic characteristics
dynamic characteristics
dywan
maszyna igłowa
mechanizm napędzający igły
analiza wektorowa
Opis:
In a typical carpet tufting machine, kinematic and dynamic characteristics of the needle multi-linkage mechanism are the important factors affecting the quality of the tufting carpet. For providing a rational basis for mechanism design and vibration characteristic analysis, a mathematical model of the needle multi-linkage mechanism is constructed using the complex vector analysis method. On the basis of the model, kinematic characteristic curves and dynamic characteristic curves of the needle multi-linkage mechanism are analyzed by simulation methods. Finally experimental validation of the alternating load dynamic characteristics is performed on the needle multi-linkage mechanism in a typical carpet tufting machine. The results prove the theoretical analysis validity of the needle multi-linkage mechanism.
W typowej maszynie wiążącej dywany charakterystyki kinematyczne i dynamiczne mechanizmu napędzającego układ igieł są bardzo ważnym czynnikiem określającym jakość wytwarzanych dywanów. Dla otrzymania racjonalnej podstawy dla projektowania mechanizmu i analizy charakterystyk wibracyjnych opracowano matematyczny model mechanizmu napędzającego igły. Przy opracowaniu modelu zastosowano metodę kompleksowej analizy wektorowej. Posłużyło to do otrzymania kinematycznych i dynamicznych krzywych przebiegu. Przebiegi te analizowano za pomocą metod symulacji. Następnie oceniono wyniki eksperymentalnie stosując typową maszynę do wytwarzania dywanów. Wyniki potwierdziły prawidłowość przyjętych teoretycznie zależności.
Źródło:
Fibres & Textiles in Eastern Europe; 2016, 3 (117); 103-109
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New information on sexual dimorphism and allometric growth in Keichousaurus hui, a pachypleurosaur from the Middle Triassic of Guizhou, South China
Autorzy:
Xue, Y.
Jiang, D.
Motani, R.
Rieppel, O.
Sun, Y.
Sun, Z.
Ji, C.
Yang, P.
Powiązania:
https://bibliotekanauki.pl/articles/19926.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
Keichousaurus hui is a small pachypleurosaur (Reptilia: Sauropterygia) from the Triassic of China. Many specimens of various growth stages are known, making them ideal for ontogenetic research. We report 22 new specimens from the Middle Triassic of Xingyi (Guizhou, south China), and combined their skeletal measurements with those from 85 published specimens to analyze the ontogenetic trajectory of sexual dimorphism. An Exploratory Factor Analysis suggests that the largest factors behind morphological disparity within the species are body size followed by gender. Sexual dimorphism is most clearly reflected in selected skeletal ratios that are more pronounced in males than in females. We found that the relative length of femur to body size was useful in gender identification, in addition to three ratios that are traditionally used, namely a distal expansion of the humerus relative to its shaft, humerus length relative to body size, and humerus length relative to femur length. Two distinctive patterns exist in allometric changes of these four ratios. The distal expansion of the humerus is exceptional in that it is equally pronounced in juvenile and adult males and therefore must have been fully established during embryonic growth. The other three features are not pronounced at birth size and subsequently become pronounced during postembryonic growth. However, males and females already show different growth trajectories at birth size even in these three. Therefore, the fate of sexually dimorphic features seems to have already been set during embryonic growth in K. hui.
Źródło:
Acta Palaeontologica Polonica; 2015, 60, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Combustion Characteristics and Mechanism of Boron-based, Fuel-rich Propellants with Agglomerated Boron Powder
Autorzy:
Xu, H. -X.
Pang, W.-Q.
Guo, H.-W.
Zhao, F.-Q.
Wang, Y.
Sun, Z.-H.
Powiązania:
https://bibliotekanauki.pl/articles/358733.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
analytical chemistry
boron-based fuel-rich solid propellants
agglomerated boron powder
combustion performance
combustion mechanism
Opis:
In order to extend the burning rate of boron-based, fuel-rich solid propellants with agglomerated boron powder, the effects of the boron content, the AP content, and of the magnesium powder content, on the burning rate and pressure exponent have been studied systematically. It has been shown that when the AP content is constant, the burning rate of the propellants increases with an increase in the agglomerated boron content. Furthermore, the burning rate and pressure exponent increase with increasing the contents of AP and magnesium powder. By means of single colour frame amplification photography and combustion wave tests, the combustion mechanism of these propellants has been investigated. It has been shown that the flame of the propellants becomes brighter by increasing the AP content, the dT/dxcp and dT/dxgp of the propellant FR-5 being around 6815 and 5789 °C/mm respectively, higher than those of FR-4, resulting in greater burning rates. The Ts of these propellants is above 683 °C, which is higher than the decomposition peak temperatures of agglomerated boron powder and of propellants (about 649 °C), which indicates that agglomerated boron powder is partially oxidized on the combustion surface, and the heat released from it may be beneficial to the combustion of the propellants.
Źródło:
Central European Journal of Energetic Materials; 2014, 11, 4; 575-587
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production of intergeneric allotetraploid between autotetraploid non-heading Chinese cabbage (Brassica campestris ssp. chinensis Makino) and autotetraploid radish (Raphanus sativus L.)
Autorzy:
Sun, C.-Z.
Li, Y.
Zhang, S.-N.
Zheng, J.-S.
Powiązania:
https://bibliotekanauki.pl/articles/56661.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
intergeneric allotetraploid
autotetraploid
non-heading cabbage
Chinese cabbage
Brassica campestris ssp.chinensis
radish
Raphanus sativus
embryo culture
simple sequence repeat
Opis:
Intergeneric hybrids between non-heading Chinese cabbage (Brassica campestris ssp. chinensis Makino; 2n = 4x = 40) and radish (Raphanus sativus L.; 2n = 4x = 36) were obtained through ovary culture and embryo rescue. Some hybrid embryos (0.11 per ovary) were produced, but only 4 of them germinated. As most hybrid embryos failed to develop into plantlets directly, plants were regenerated by inducing shoots on the cultured cotyledon and inducing roots on the root induction medium. All hybrid plants were morphologically uniform. They resembled the non-heading Chinese cabbage in the long-lived habit, the plant status, the vernalization requirement and the petiole color, while the petiole shape, leaf venation pattern and flowers were more similar to those of radish. Upon examination of the flowers, these were found to have normal pistil, but rudimentary anthers with non-functional pollen grains. The somatic chromosome number of F1 plants was 38. Analysis of SSR banding patterns provided additional confirmation of hybridity.
Źródło:
Acta Societatis Botanicorum Poloniae; 2014, 83, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification, evaluation, and application of the genomic-SSR loci in ramie
Autorzy:
Luan, M.-B.
Yang, Z.-M.
Zhu, J.-J.
Deng, X.
Liu, C.-C.
Wang, X.-F.
Xu, Y.
Sun, Z.-M.
Chen, J.-H.
Powiązania:
https://bibliotekanauki.pl/articles/57981.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Botaniczne
Opis:
To provide a theoretical and practical foundation for ramie genetic analysis, simple sequence repeats (SSRs) were identified in the ramie genome and employed in this study. From the 115 369 sequences of a specific-locus amplified fragment library, a type of reduced representation library obtained by high-throughput sequencing, we identified 4774 sequences containing 5064 SSR motifs. SSRs of ramie included repeat motifs with lengths of 1 to 6 nucleotides, and the abundance of each motif type varied greatly. We found that mononucleotide, dinucleotide, and trinucleotide repeat motifs were the most prevalent (95.91%). A total of 98 distinct motif types were detected in the genomic-SSRs of ramie. Of them, The A/T mononucleotide motif was the most abundant, accounting for 41.45% of motifs, followed by AT/TA, accounting for 20.30%. The number of alleles per locus in 31 polymorphic microsatellite loci ranged from 2 to 7, and observed and expected heterozygosities ranged from 0.04 to 1.00 and 0.04 to 0.83, respectively. Furthermore, molecular identity cards (IDs) of the germplasms were constructed employing the ID Analysis 3.0 software. In the current study, the 26 germplasms of ramie can be distinguished by a combination of five SSR primers including Ibg5-5, Ibg3-210, Ibg1-11, Ibg6-468, and Ibg6-481. The allele polymorphisms produced by all SSR primers were used to analyze genetic relationships among the germplasms. The similarity coefficients ranged from 0.41 to 0.88. We found that these 26 germplasms were clustered into five categories using UPGMA, with poor correlation between germplasm and geographical distribution. Our study is the first large-scale SSR identification from ramie genomic sequences. We have further studied the SSR distribution pattern in the ramie genome, and proposed that it is possible to develop SSR loci from genomic data for population genetics studies, linkage mapping, quantitative trait locus mapping, cultivar fingerprinting, and as genetic diversity studies.
Źródło:
Acta Societatis Botanicorum Poloniae; 2016, 85, 3
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrogen sulfide modulates gastric acid secretion in rats via involvement of substance P and nuclear factor-kappaB signaling
Autorzy:
Sun, H.-Z.
Gong, X.-Y.
Wu, L.
Wang, X.-X.
Nie, Y.-N.
Shang, R.
Wang, H.
Li, Y.-C.
Sun, Q.-F.
Gao, P.-F.
Bi, J.-X.
Powiązania:
https://bibliotekanauki.pl/articles/69523.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
hydrogen sulphide
gastric acid secretion
rat
nuclear factor-kappaB
substance P
transient receptor potential vanilloid type 1
neurokinin-1
Źródło:
Journal of Physiology and Pharmacology; 2018, 69, 3
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lifetime Distribution and Associated Inference of Systems with Multiple Degradation Measurements Based on Gamma Processes
Wyznaczanie rozkładu czasów życia oraz wnioskowanie dla systemów wymagających pomiarów współistniejących degradacji w oparciu o procesy gamma
Autorzy:
Pan, Z.
Feng, J.
Sun, Q.
Powiązania:
https://bibliotekanauki.pl/articles/302179.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
multiple degradation
lifetime distribution
gamma process
Birnbaum-Saunders distribution
MCMC method
degradacja współistniejąca
rozkład czasów życia
proces gamma
rozkład Birnbauma-Saundersa
metoda MCMC
Opis:
With development of science and technology, many engineering systems take on high reliable characteristic and usually have complex structure and failure mechanisms, with their reliability being evaluated by multiple degradation measurements. In certain physical situations, the degradation of these performance characteristics would be always positive and strictly increasing. Therefore, the gamma process is usually considered as a degradation process due to its independent and non-negative increments properties. In this paper, we suppose that a system has multiple dependent performance characteristics and that their degradation can be modeled by gamma processes. For such a multivariate degradation involving three or more performance characteristics, we propose to use a multivariate Birnbaum-Saunders distribution and its marginal distributions to approximate the reliability function and give the corresponding lifetime distribution. And then, the inferential method for the model parameters is developed. Finally, for an illustration of the proposed model and method, a simulated example is discussed and some computational results are presented.
Wraz z rozwojem nauki i techniki, powstaje coraz więcej systemów inżynieryjnych o wysokich parametrach niezawodnościowych, które zwykle charakteryzują się złożoną strukturą i złożonymi mechanizmami uszkodzeń. Ocena niezawodności w przypadku takich systemów wymaga pomiarów współwystępujących procesów degradacji . W pewnych sytuacjach fizycznych, degradacja właściwości użytkowych systemu będzie zawsze dodatnia oraz ściśle rosnąca. Proces degradacji jest zwykle procesem gamma, który charakteryzują niezależne i nieujemne przyrosty. W niniejszej pracy, założono, że system ma wiele zależnych charakterystyk pracy oraz że ich degradację można modelować procesem gamma. W przypadkach takiej wielowymiarowej degradacji obejmującej trzy lub więcej charakterystyk pracy zaproponowano zastosowanie rozkładu Birnbauma-Saundersa (uwzględniającego wiele zmiennych) oraz jego rozkładów brzegowych do aproksymacji funkcji niezawodności oraz określania odpowiadającego jej rozkładu czasu pracy. Opracowano metodę wnioskowania dla parametrów modelu. Wreszcie, dla zilustrowania proponowanego modelu oraz metody, omówiono przykład symulacyjny oraz przedstawiono niektóre wyniki obliczeniowe.
Źródło:
Eksploatacja i Niezawodność; 2016, 18, 2; 307-313
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of the Thermal Treatment on the Microstructure and Magnetic Property of $Fe_{68}Zr_{20}B_{12}$ Alloy Prepared by Mechanical Alloying
Autorzy:
Sun, Y.
Yu, W.
Hua, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1505353.pdf
Data publikacji:
2011-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.37.Lp
61.05.Qr
Opis:
$Fe_{68}Zr_{20}B_{12}$ amorphous alloy prepared by mechanical alloying technique of 60 h of duration was annealed at different temperatures (420-720°C) during 1 h. Microstructure and magnetic property of as-milled and annealed alloy were investigated by X-ray diffraction, transmission electron microscopy, the Mössbauer spectroscopy and vibrating sample magnetometer techniques. $Fe_{68}Zr_{20}B_{12}$ powders milled during 60 h exhibit amorphous character. After annealing at 420°C, α-Fe phase precipitates from amorphous matrix. Transmission electron microscopy analysis shows the nucleation and growth of α-Fe grains. The Mössbauer results of the annealed alloy at 670°C show that the $Fe_3B$ phase precipitates already and there is still remaining amorphous phase. Coercivity increases with increasing annealing temperature, which is closely related to the microstructures after annealing.
Źródło:
Acta Physica Polonica A; 2011, 119, 3; 374-377
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scale-dependent environmental control of mesozooplankton community structure in three aquaculture subtropical bays of China
Autorzy:
Sun, D.
Liu, Z.
Wang, C.
Powiązania:
https://bibliotekanauki.pl/articles/48224.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
zooplankton
aquaculture
pollution effect
multivariate analysis
subtropical bay
China
Źródło:
Oceanologia; 2016, 58, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of ship rolling motion on take-off aerodynamic characteristics of aircraft
Autorzy:
He, Z.
Sun, X.
Gu, X.
Powiązania:
https://bibliotekanauki.pl/articles/259257.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship rolling motion
ski-jump take-off
Meshless method
WALE turbulence model
aerodynamic characteristics
Opis:
Ship motion is an important factor affecting on the safety of ski-jump take-off. The simplified frigate ship SFS1 was numerically simulated, and the results were compared with the experimental data, the feasibility of the calculation method was verified; Meshless method and WALE turbulence model were used to simulate the process of aircraft skijump take-off, aerodynamic characteristics under different rolling conditions during the aircraft ski-jump take-off process were presented. The results showed that: the influence of ship rolling motion on lift coefficient, drag coefficient and pitching moment was small, side force and rolling moment were greatly affected by rolling motion; the region of downwash with the maximum speed was about 10 m from the bow; the safety of ski-jump take-off was greatly affected when aircraft was close to the bow within 20 m.
Źródło:
Polish Maritime Research; 2018, S 2; 23-29
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Provenance-specific climate sensitivity of Pinus massoniana – a multi-environmental trial in subtropical China
Autorzy:
Zhang, Z.
Jin, G.
Feng, Z.
Sun, L.
Zhou, Z.
Powiązania:
https://bibliotekanauki.pl/articles/2078265.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Pinus massoniana
provenance
climate change
wood density
radial growth
Opis:
Climate change is causing changes in tree species performance and distribution, impacting breeding programme effectiveness. Our aim was to analyse the effects of provenance and climatic factors on the annual ring density of Masson pine (Pinus massoniana Lamb.) at different experimental sites and potential breeding strategies that may be developed in response to future climate change. The study trees represented provenances originating from the western, east-central, northern, and southern regions of P. massoniana distribution in China. The wood density differed significantly among provenances. A multisite variance analysis test showed that the type B correlation coefficients for ring density at the two sites stud- ied were less than 0.8, indicating an interaction effect of genotype by environment (G×E) on tree ring density. Climatic factors directly affected the wood density properties. At Chun’an (CA), the maximum latewood density (MXD) and minimum earlywood density (MND) were positively correlated with absolute maximum temperatures in August and May of the current growing season, respectively. At Taizi Mountain (TZS), MXD was significantly positively correlated with absolute maximum temperature in September of the current year and significantly negatively correlated with precipitation in June. MND was significantly positively correlated with absolute maximum temperature in May of the current year and significantly negatively correlated with precipitation in April. The climatic effects on P. massoniana wood density differed among seed-source origins. This study showed that ring density characteristics differed significantly among provenances, and provenance selection could promote wood density. MXD and MND exhibited significant genotype-by-environment interaction effects, and significant correlations were found between ring density and temperature and precipitation conditions. These findings suggest that climatic factors and site condi- tions in addition to genetics could be strong drivers of wood density variation, and/or that wood density is a highly plastic trait.
Źródło:
Dendrobiology; 2021, 85; 3-18
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
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