Autor: Chen, D. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Research of Particle Transport with External Driving Force and Entropy Barrier
Autorzy:: Li, S.
Zhang, Z.
Chen, D.
Tematy:: 05.40.Jc
05.40.-a
05.10.Gg
05.60.Cd; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1398914.pdf Link otwiera się w nowym oknie
Opis:: Transport of Brownian particle moving along a three-dimensional throat-like channel is investigated in the presence of an external constant force. The solution of the Fick-Jacobs equation in the situation is solved, and the probability current density and particle current describing the motion of particle are obtained. It is found that entropy barrier and external force can reverse the direction of particle current. The motion of Brownian particle can be tuned by the entropy barrier and the external force.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A theorem of Cesari on mulitple Fourier series
Autorzy:: Chen, Jau-D.
Wydawca:: Polska Akademia Nauk. Instytut Matematyczny PAN
Powiązania:: https://bibliotekanauki.pl/articles/1386029.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Stability criteria for large-scale time-delay systems; the LMI approach and the Genetic Algorithms
Autorzy:: Chen, J.- D.
Tematy:: algorytm genetyczny
delay-dependent criterion
large-scale systems
linear matrix inequality
genetic algorithms; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Powiązania:: https://bibliotekanauki.pl/articles/969948.pdf Link otwiera się w nowym oknie
Opis:: This paper addresses the asymptotic stability analysis problem for a class of linear large-scale systems with time delay in the state of each subsystem as well as in the interconnections. Based on the Lyapunov stability theory, a delay-dependent criterion for stability analysis of the systems is derived in terms of a linear matrix inequality (LMI). Finally, a numerical example is given to demonstrate the validity of the proposed result.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Optical generation of ultra-wideband signals with a reconfigurable spectral notch-band
Autorzy:: Xiang, P.
Chen, Y.
Chen, D.
Zhao, J.
Tematy:: ultra-wideband (UWB)
ultra-wideband over fiber
notch-band
interference avoidance; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/174353.pdf Link otwiera się w nowym oknie
Opis:: A novel method for optical generation of ultra-wideband signals with a reconfigurable spectral notch-band is proposed. In the proposed system, ultra-wideband signals are generated in the optical domain and an optical tunable delay line is deployed to introduce a notch-band to the spectral profile of the generated ultra-wideband signals, which can effectively avoid the signal interference between ultra-wideband signals and pre-planned narrowband wireless signals used in wireless local area networks (WLAN). A theoretical model describing the proposed system is derived; the optical generation and fiber transmission of ultra-wideband signals with a reconfigurable notch-band are demonstrated via computer simulations.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Preparation of CaCO3-SiO2 composite with core-shell structure and its application in silicone rubber
Autorzy:: Cui, Ch.
Ding, H.
Cao, L.
Chen, D.
Tematy:: calcium carbonate
silica
silicone rubber
mechnao-chemistry; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/778525.pdf Link otwiera się w nowym oknie
Opis:: A new CaCO_{3_{-SiO_{2_{composite with core-shell structure was successfully prepared by mechano-chemistry method (MCM). SEM and FTIR indicated that SiO_{2_{particles were homogeneously immobilized on the surface of CaCO_{3_{. The well dispersion of this CaCO_{3_{-SiO_{2_{composite into silicone rubber can not only reduce the usage amount of SiO_{2_{, but also improve the mechanical properties of silicone rubber. By the calculation, the theoretical numbers of the SiO2 particles is about 10 times as large as that of CaCO_{3_{particles in the CaCO_{3_{-SiO_{2_{composite. Mixing CaCO_{3_{-SiO_{2_{composite in silicone rubber can enhance the breaking strength of the silicone rubber about 18% as high as that when mixing the pure SiO_{2_{. And the elongation at break is about 14% less than that of adding the pure SiO_{2_sample.}}}}}}}}}}}}}}}}}}}}}}}}}}}
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Dylematy miejskiej zabudowy
Autorzy:: Chen, Donald D. T.
Współwytwórcy:: Kunkel, Robert M. Tłumaczenie
Tematy:: Strefa podmiejska Stany Zjednoczone
Urbanizacja Stany Zjednoczone; Pokaż więcej
Cytata wydawnicza:: Świat Nauki 2001, nr 8, s. 68-75
Dostawca treści:: Bibliografia

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Skocz do pozycji: 7.

Tytuł:: Comparison and Analysis of Magnetic-Geared Permanent Magnet Electrical Machine at No-Load
Autorzy:: Liu, X.
Chen, D.
Yi, L.
Zhang, Ch.
Wang, M.
Tematy:: magnetic gear
MGPM electrical machine
quantitative comparison
finite element analysis
no load; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/140663.pdf Link otwiera się w nowym oknie
Opis:: Magnetic-geared permanent magnet (MGPM) electrical machine is a new type of machine by incorporating magnetic gear into PM electrical machine, and it may be in operation with low-speed, high-torque and direct-driven. In this paper, three types of MGPM machines are present, and a quantitative comparison among them is performed by finite element analysis (FEA). The magnetic field distribution, stable torque and back EMF are obtained at no-load. The results show that three types of MGPM machine are suitable for different application fields respectively according to their own advantages, such as high torque and back EMF, which form an important foundation for MGPM electrical machine research.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: A novel approach to photonic generation of periodic triangular radio frequency waveforms
Autorzy:: Xiang, P.
Guo, H.
Chen, D.
Zhu, H.
Wu, C.
Tematy:: microwave photonics
triangular waveform
polarization modulator (PolM)
microwave photonic filter (MPF)
radio frequency (RF) waveform generation; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/174643.pdf Link otwiera się w nowym oknie
Opis:: A novel approach to photonic generation of triangular radio frequency waveforms with a tunable repetition rate is proposed and analyzed. In the proposed system, a continuous-wave light is modulated by a reference microwave signal through a polarization modulator, and then its output optical sidebands are manipulated by a microwave photonic filter with a negative tap. By properly adjusting the system parameters, full-duty-cycle triangular radio frequency waveforms can be generated after optical-to-electrical conversion, and its repetition rate (frequency) can be tuned in a wide range. A model describing the proposed system is derived, which is verified via computer simulations.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Catalytic decomposition of toluene over La1-xSr xMnO3/palygorskite synthesized catalysts
Autorzy:: Song, L.
Chen, T.
Chen, D.
Chen, Y.
Xie, J.
Liu, H.
Tematy:: catalysts
manganese
manganese oxide
toluene
transmission electron microscopy
X ray diffraction
Palygorskite
katalizatory
mangan
tlenek manganu
toluen
transmisyjna mikroskopia elektronowa
dyfrakcja promieniowania rentgenowskiego; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/207996.pdf Link otwiera się w nowym oknie
Opis:: Palygorskite (PG) supported La1-xSrxMnO3 catalysts were fabricated by copreripitation. The catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), specific surface area (SSA) and H2 temperature programmed reduction (H 2-TPR). Catalytic activity for VOCs was examined by using toluene as a model compound. The results show that the surface area as well as mechanical strength of catalysts increase substantially after catalysts loaded in PG. XRD patterns show that after calcination at 700 0C, PG as a support in 9% LaMn03/PG and 9% La0.7Sr0.3MnO3/PG was transformed into amorphous phase and the morphology was not destroyed. It was well established that the main reductive components are factually Mn(III) or Mn(IV) oxides in catalysts based on the results of TPR. It was also found that Mn(IV) increases while Mn(III) reduces responding with the increasing amount of Sr. Toluene conversion rate of as-preparedμ% La1-xSr xMnO3/PG increases with the increasing values of x and μ when x=0-0.3 and μ = 3-9%. Toluene can be converted completely at 285 0C by 9% La0.7Sr0.3MnO3/PG catalyst while no significant change was observed after addition on the doping and loading amount of Sr. During a 100 h stability experiment of 9% La 0.7Sr0.3MnO3/PG catalyst, toluene removal was found to be above 95%.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Antioxidant activity and mechanism in flower of Hylocereus undatus (Haw.) Britt. et Rose
Autorzy:: Li, X.
Gao, Y.
Han, W.
Lin, J.
Hu, Q.
Chen, D.
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/19838.pdf Link otwiera się w nowym oknie
Opis:: Hylocereus undatus flower is commonly used as food or for medicinal purposes in south China. To study its antioxidant activity and mechanism we used antioxidant and chemical assays to compare two commercial samples from different locations (Shenjing, Qixing). The difference in antioxidant levels corresponded with differences in chemical content (including total phenolics, total flavonoids, kaempferol and quercetin) between Shenjing and Qixing. The antioxidant ability of H. undatus flower seems attributable to total phenolics (mainly total flavonoids). Kaempferol is one of the main bioactive components. H. undatus flower exerts its antioxidant effects through metal chelation and radical scavenging via hydrogen atom (H•) and electron (e) donation.
Dostawca treści:: Biblioteka Nauki

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