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Wyświetlanie 1-10 z 86
Tytuł:
Heating control of heated twin radiosonde humidity sensor based on DMC
Autorzy:
Sun, N.
Zhang, Y.
Zhang, W
Cheng, E.
Liu, Y.
Tematy:
DMC
twin heated humidity sensor
expanded responsible curve
heating control
Pokaż więcej
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:
https://bibliotekanauki.pl/articles/260018.pdf  Link otwiera się w nowym oknie
Opis:
In order to effectively solve condensation and icing problems of radiosonde in low-temperature environment at high altitude, humidity sensor heated automatic alternately to remove pollution and improve the measurement accuracy. Heat experiments obtained the curve of rising temperature and responsible time on heated twin humidity sensor in normal temperature and pressure, by expanded responsible curve to obtain heated model of twin heated humidity sensor and by the analysis of heating model, use DMC and PID control for heating respectively. Simulation results show that the DMC control meets the practical requirements of measure at high altitude.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Network resource reallocation strategy based on an improved capacity-load model
Strategia realokacji zasobów sieciowych oparta o udoskonalony model przepustowości-obciążenia
Autorzy:
Zhou, J.
Huang, N.
Sun, X.
Xing, L.
Zhang, S.
Tematy:
network reliability
maintenance
resource reallocation
cascading failures
capacity-load relationship
niezawodność sieci
utrzymanie ruchu
realokacja zasobów
awarie kaskadowe
zależność przepustowość
obciążenie
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Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Powiązania:
https://bibliotekanauki.pl/articles/300643.pdf  Link otwiera się w nowym oknie
Opis:
Network resource reallocation is a common way to help restore performance of network systems subject to cascading failures. Majority of current network resource allocation strategies either give little regard to or make impractical assumptions about the relationship between capacity and load of network nodes, despite this relationship is closely related to the propagation of network failures. In this work we present and verify an improved nonlinear network capacity-load model based on the actual relation between network capacity and load. According to the verified model and realistic dynamic characteristics of network loads, we propose a new network resource reallocation strategy for networks under attacks from the perspective of maintenance. The strategy aims to effectively reallocate new capacity to network nodes after cascading failures occur. Both theoretical analysis and empirical studies are performed on three typical types of complex networks. Results show that the proposed network resource reallocation strategy is more efficient in mitigating devastating impact of cascading failures on network performance, in comparison to other three existing network resource reallocation strategies.
Realokacja zasobów sieci jest powszechnym sposobem, stosowanym w celu przywrócenia działania systemów sieciowych objętych awariami kaskadowymi. Większość współczesnych strategii alokacji zasobów sieciowych kładzie mały nacisk lub czyni niepraktyczne założenia dotyczące zależności między przepustowością i obciążeniem węzłów sieci, choć zależność ta jest ściśle związana z rozchodzeniem się awarii sieci. W niniejszej pracy przedstawiono i zweryfikowano udoskonalony nieliniowy model przepustowości-obciążenia sieci na podstawie rzeczywistej relacji między przepustowością sieci i jej obciążeniem. Na podstawie zweryfikowanych modelu i realistycznych cech dynamicznych obciążeń sieciowych, proponujemy nową strategię realokacji zasobów dla sieci poddawanych atakom z perspektywy utrzymania ruchu. Celem strategii jest skuteczna realokacja nowej przepustowości węzłom sieci po wystąpieniu kaskadowych awarii. Przeprowadzono zarówno teoretyczne analizy, jak i badania empiryczne na trzech typowych rodzajach sieci złożonych. Wyniki pokazują, że proponowana strategia realokacji zasobów sieci jest bardziej skuteczna w zwalczaniu niszczącego wpływu kaskadowych awarii na przepustowość sieci w porównaniu do pozostałych trzech wykorzystywanych strategii realokacji zasobów sieciowych.
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.
Tematy:
intergeneric allotetraploid
autotetraploid
non-heading cabbage
Chinese cabbage
Brassica campestris ssp.chinensis
radish
Raphanus sativus
embryo culture
simple sequence repeat
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Wydawca:
Polskie Towarzystwo Botaniczne
Powiązania:
https://bibliotekanauki.pl/articles/56661.pdf  Link otwiera się w nowym oknie
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.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ABA alleviated soybean seedling stress exposed to UV-C radiation
Autorzy:
Yang, L.
Gao, N.
Yang, Y.
Zhang, Y.
Gao, J.
Sun, Y.
Tematy:
ultraviolet-C
ABA
active oxygen metabolism
flavonoids
soybean
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Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/2082655.pdf  Link otwiera się w nowym oknie
Opis:
In order to understand the roles of abscisis acid in soybean exposed to UV-C radiation, soybean seedlings were exposed to UV-C radiation and ABA was applied. The chlorophyll content, active oxygen metabolism and flavonoids content of soybean seedlings were investigated. The present study revealed that UV-C radiation significantly attenuated the chlorophyll content and suppressed PSII activity. It was observed that the contents of H2O2, malondialdehyde and O2 - were markedly increased, and the activities of antioxidant enzymes such as superoxide dismutase, peroxidase and catalase were enhanced, so were the flavonoids content, whereas the seedling height and biomass were significantly reduced. ABA application improved the activities of superoxide dismutase, peroxidase, catalase and the contents of flavonoids, decreased the contents of H2O2, MDA and O2 -, and also increased the chlorophyll content and enhanced PSII performance, thus enhancing biomass accumulation. The results suggested that ABA alleviated UV-C damage to soybean seedlings by reducing ROS generation and enhancing antioxidase activity. The isoflavones daidzin and genistein were significantly responsive to UV-C.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pre-concentration of graphite and LiCoO2 in spent lithium-ion batteries using enhanced gravity concentrator
Autorzy:
Zhu, X,-N.
Tao, Y.-J.
He, Y.-Q.
Zhang, Y.
Sun, Q.-X.
Tematy:
spent lithium-ion batteries
electrode material
resource utilization
pre-concentration
enhanced gravity concentrator
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Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:
https://bibliotekanauki.pl/articles/109609.pdf  Link otwiera się w nowym oknie
Opis:
The pre-concentration of electrode material of spent lithium-ion battery has great significance on the resource utilization and environmental protection. The feasibility of separation of graphite and LiCoO2 based on density difference using the enhanced gravity concentrator was verified in this paper. Combustion characteristics of LiCoO2 and graphite were used to propose a simple evaluation index of separation efficiency. Separation tests were carried out to specify the influence of operating parameters on the separation efficiency. Moreover, the effect of particle size on the separation performance was studied. Combustion characteristics results showed that mass loss of graphite was much greater than that of LiCoO2. Thus, mass loss were used to evaluate the purity of product. Effective separation of graphite and LiCoO2 was achieved by the enhanced centrifugal separator. Separation results showed that increasing centrifugal force decreased the overflow yield and increased the graphite content of the overflow stream. In addition, yield of overflow grew an increase in fluidization water pressure, while the purity of graphite in overflow decreased. The effect of particle size on the separation efficiency was also significant, the separation efficiency decreased with the decreasing of particle size.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Abundance and community structure of ammonia oxidizing archaea and bacteria in response to peanut growth under controlled condition in Shandong, China
Autorzy:
Huang, C.
Xu, N.
Fu, Z.
Sun, B.
You, S.
Ma, D.
Yu, J.
Tematy:
China
plant cultivation
peanut
Arachis hypogaea
plant growth
community structure
microorganism abundance
ammonia-oxidizing bacteria
ammonia-oxidizing archaea
field experiment
three-year field experiment
controlled condition
Pokaż więcej
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Powiązania:
https://bibliotekanauki.pl/articles/12689395.pdf  Link otwiera się w nowym oknie
Opis:
Based on a three-year field experiment under controlled condition in Ji’nan, China, the effects of peanut growth on the variation in the abundance and community structure of ammonia oxidizing bacteria (AOB) and archaea (AOA) before and after peanut growth were investigated through quantitative PCR and cluster analysis of terminal-restriction fragment length polymorphism. Our results show that the community composition of AOA and AOB was greatly affected by the peanut growth leading to the decreased abundance of AOA and increased abundance of AOB. Furthermore, AOA and AOB community structures varied before and after peanut growth. Phylogenetic analysis indicated that all AOA and AOB community sequences were clustered into the uncultured group. Altogether, the results suggested that the abundance of AOA and AOB in soil and their community compositions can be greatly affected by the peanut growth.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nano-silica reinforced hybrid light-diffusing films with enhanced mechanical and thermal properties
Autorzy:
Sun, X
Li, N.
Hang, J
Jin, L.
Shi, L
Cheng, Z.
Shang, D
Tematy:
optical materials and properties
nanocomposites
light-diffusing films
sol-gel preparation
nanoparticles
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Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:
https://bibliotekanauki.pl/articles/175043.pdf  Link otwiera się w nowym oknie
Opis:
Ultraviolet-curable hybrid light-diffusing films with good optical, mechanical and thermal properties were prepared by involving vinyl-silane-modified nano-silica into light-diffusing films. The light-diffusing films were two-phase materials consisting of UV-curable matrix and light-diffusing agent. The effect of three different light-diffusing agents, viz. inorganic layered particle (CaCO3), spherical acrylic resin (MR-7HG) and organosilicone resin (KMP-590) and their contents, on the optical properties of light-diffusing films was studied. The results showed the light-diffusing film exhibited good optical properties (the transmittance was 90.7% and the haze was 95.5%) when KMP-590 was a light-diffusing agent and its content was 25%. It was because that KMP-590 showed good transparency, good dispersion in the UV-curable matrix and the greater difference in refractive index with UV-curable matrix and polycarbonate substrate. Furthermore, the effect of nano-silica on the optical, mechanical and thermal properties of the hybrid light-diffusing films was investigated. Compared to that of the light-diffusing films without nano-silica, the haze of the hybrid light-diffusing films containing nano-silica was lightly enhanced to above 98%, while their transmittance basically remained unchanged at a high value (above 89%). Additionally, scratch and abrasion resistance of the hybrid films were obviously improved by nano-silica especially with the particle size of 10–15 nm. Furthermore, the mechanical property and thermal stability of the hybrid films were improved as the content of nano-silica with the particle size of 10–15 nm increased. The enhanced mechanical property and thermal stability of the films could be attributed to the dense structure induced by the increase in network density with the addition of vinyl-silane-modified nano-silica.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reduced stress and fluctuation for the integrated α-Si TFT gate driver on the LCD
Autorzy:
Huang, N. X.
Shiau, M. S.
Wu, H.-C.
Sun, R. C.
Liu, D.-G.
Tematy:
sterownik bramy
fluktuacja hałasu
wpływ naprężenia
system w panelu
gate driver
fluctuation noise
stress effect
system on panel (SoP)
Pokaż więcej
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Powiązania:
https://bibliotekanauki.pl/articles/397883.pdf  Link otwiera się w nowym oknie
Opis:
In this paper, an integrated TFT gate driver was designed on the glass substrate not only to decrease the fluctuation at the output, but also to reduce the stress effect on the pull-down branches. The fluctuation in the voltage at the output transistor was attributed to the coupled clocks through the parasitic capacitors in the TFTs. In this study, the voltage gating the pull-down braches was reduced for longer operational lifetime. This scheme was investigated by simulation by Smart-SPICE with an α-Si TFT model from Wintek Inc. at level 35.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 86

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