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71.
Naoyuki Onodera Takayuki Aoki Hiromichi Kobayashi 《Journal of computational physics》2011,230(14):5787-5805
The resolution of a numerical scheme in both physical and Fourier spaces is one of the most important requirements to calculate turbulent flows. A conservative form of the interpolated differential operator (IDO-CF) scheme is a multi-moment Eulerian scheme in which point values and integrated average values are separately defined in one cell. Since the IDO-CF scheme using high-order interpolation functions is constructed with compact stencils, the boundary conditions are able to be treated as easy as the 2nd-order finite difference method (FDM). It is unique that the first-order spatial derivative of the point value is derived from the interpolation function with 4th-order accuracy and the volume averaged value is based on the exact finite volume formulation, so that the IDO-CF scheme has higher spectral resolution than conventional FDMs with 4th-order accuracy. The computational cost to calculate the first-order spatial derivative with non-uniform grid spacing is one-third of the 4th-order FDM. For a large-eddy simulation (LES), we use the coherent structure model (CSM) in which the model coefficient is locally obtained from a turbulent structure extracted from a second invariant of the velocity gradient tensor, and the model coefficient correctly satisfies asymptotic behaviors to walls. 相似文献
72.
Ryuju Suzuki Tsunenobu Onodera Hitoshi Kasai Hidetoshi Oikawa 《Molecular Crystals and Liquid Crystals》2015,621(1):150-155
We have successfully fabricated insoluble copper(I) complex [Cu(μ-I)dppet]2 nanocrystals by developing the heterogeneous reaction process between rod-like nanocrystals of dppet ligand prepared in advance and added acetonitrile solution of copper(I) halide. During this reaction process, the shape of dppet ligand nanocrystals was dramatically changed from rod-like to spherical. Probably, the complexation reaction and subsequent nanocrystallization would proceed on or near swollen surface of dppet nanocrystals in acetonitrile droplet as restricted reaction field. 相似文献
73.
Morita Kentato Motoyama Keiichi Kuramoto Ayako Onodera Risako Higashi Taishi 《Journal of inclusion phenomena and macrocyclic chemistry》2021,100(3-4):169-175
Journal of Inclusion Phenomena and Macrocyclic Chemistry - In recent years, functional materials using cyclodextrin (CD)-based polyrotaxanes have attracted considerable attention, and... 相似文献
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76.
A lower sputtering gas pressure during the sputtering process tends to result in the deposition of denser Co-Cr films, but also increases compressive internal stresses when a mixture of Ar and Kr is used as the sputtering gas. The internal stresses have been reduced with an increase in the ratio of Kr in the gas mixture. 相似文献
77.
Co-Cr/Al multilayers exhibit excellent magneto-optical characteristics due to the well-defined interfaces between Co-Cr and Al layers. Consequently, these multilayers may be useful in media for perpendicular magnetic/magneto-optical two-way magnetic recording systems. 相似文献
78.
Yoshito Wakui Anna E Persulessy Takuji Ikeda Takeo Ebina Yoshio Onodera Toshishige M Suzuki 《Analytical sciences》2005,21(4):433-435
The adsorption of arsenic(V) was investigated using macroporous resin beads containing magnetite crystals. Arsenic(V) was favorably adsorbed at pH 2-9, where the distribution coefficients were larger than 10(3). The maximum capacity was 0.050 mmol/g. Metal cations including Ca(II), Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and La(III) did not give serious interference at 10(-4) M level. Diluted arsenic(V) was collected with a packed column, and the retained arsenic(V) was quantitatively eluted out with 1 M NaOH. 相似文献
79.
Ultrafast multi-wavelength routing by an active birefringent fiber loop filter/interleaver is proposed and demonstrated. In
the proposed active filter, the loop part consists of a birefringent optical fiber and a traveling-wave-type phase modulator.
Numerical simulation using Jones matrix analysis shows that the periodic transmission/reflection bands of the filter can be
switched by changing a phase difference between clockwise and counter clockwise components passing through the birefringent
fiber loop. Experimentally, we realize fast switching by controlling the applied voltage to the phase modulator, and 8-GHz
wavelength routing operation is achieved. 相似文献
80.
K. Iguchi K.T. Esaka C.G. Lee J. Inagawa F. Esaka T. Onodera H. Fukuyama D. Suzuki S. Sakurai K. Watanabe S. Usuda 《Radiation measurements》2005,40(2-6):363-366
The fission track technique was applied to the particle analysis for safeguards environmental samples to obtain information about the isotope ratio of nuclear materials in individual particles. To detect the particles containing nuclear material with high detection efficiency and less particle loss, the influence of uranium enrichments on etching conditions of a fission track detector made of polycarbonate was investigated. It was shown that the increase in uranium enrichment shortened the suitable etching time both for particle detection and for less particle loss. From the results obtained, it was suggested that the screening of the uranium particles according to the enrichment is possible by controlling the etching time of the detector. 相似文献