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Characteristics of a Magnetically Levitated Vehicle using a Small Number of Dry Cell Batteries
Kakinoki, Toshio,Yamaguchi, Hitoshi,Mukai, Eiichi Journal of International Conference on Electrical 2014 Journal of international Conference on Electrical Vol.3 No.2
This paper describes magnetically levitated vehicle with hybrid magnets, which have been studied by the authors in place of streetcars or conveyance system. An experimental vehicle of 20kg was magnetically levitated by using a small number of dry-cell batteries, which consisted of 10 Ni-MH cells of 1900mAh in series. The magnets were activated sequentially, because the internal resistance of the batteries suppressed the maximum current. The vehicle was kept levitating for about 2 hours and was stable against disturbance due to instantaneous external force. In this paper, dynamic characteristics of the magnetically levitated vehicle using a small number of dry cell batteries are presented.
A Turnout without Movable Parts for Magnetically Levitated Vehicles with Hybrid Magnets
Kakinoki, Toshio,Yamaguchi, Hitoshi,Yoshinaga, Naoya,Mukai, Eiichi,Nishi, Hiroyuki Journal of International Conference on Electrical 2014 Journal of international Conference on Electrical Vol.3 No.3
This paper describes a turnout without movable parts for magnetically levitated vehicles with hybrid magnets, which have been studied by the authors in place of streetcars. Their low construction cost and low maintenance is key to their practical use. Magnetic levitation systems using forces of attraction can generate guidance force automatically, but the damping force against lateral motion is negligible. However, the lateral damping characteristic was improved by using divided iron type magnets and rails. Using this turnout without movable parts will facilitate smooth direction switching.
Change in type of heavy metal compounds after oxygen exposure of fly ash
( Naoto Kakinoki ),( Shinya Suzuki ),( Ayako Tachifuji ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 한국폐기물자원순환학회 심포지움 Vol.2019 No.1
Under the revision of the Waste Management and Public Cleansing Law in 1991, it was regulated that the fly ash must be landfilled after chelate treatment or cement solidification for preventing from the heavy metal leaching. However, it was reported that Pb eluted again from such treated fly ash if it was left for a certain period under the wet and oxidative condition. Therefore, the O<sub>2</sub> exposure experiment was conducted to clarify the re-elution mechanism under such condition. As the results, the Pb concentration in the elution of leaching test increased after O<sub>2</sub> exposure (Fig. 2). It suggests that the chelate bond is cleaved or the insoluble Pb compounds (PbO<sub>2</sub>) change to the water soluble compounds (PbO, PbCl<sub>2</sub>) by H<sub>2</sub> generated by the alkali hydration reaction with Al. Whereas the concentration of soluble Zn, which is amphoteric metal same as Pb, was decreased. From these results, it was considered that Zn was related to such chemical change of Pb. In this study, the change in the Zn compounds of fly ash after O<sub>2</sub> exposure was investigated to clarify the influence of O<sub>2</sub> on the change of insoluble metal compounds to soluble one. In all three experiments, the content of soluble Zn compounds and Zn oxide decreased as that of organic Zn and Zn sulfide increased (Fig. 2). It means that the soluble Zn reacted with hydrogen sulfur produced by H<sub>2</sub> and formed the insoluble ZnS under alkaline conditions. Such mechanism is also expected from the slight decrease in the concentration of the SO<sub>4</sub> <sup>2- </sup>after the O<sub>2</sub> exposure. From these results, it is estimated that O<sub>2</sub> contribute to the change in the charge of metal compounds and consequently is increased the soluble metal compounds.
Mukai, Eiichi,Kakinoki, Toshio,Yamaguchi, Hitoshi,Kimura, Yoshimasa,Fukai, Sumio Journal of International Conference on Electrical 2013 Journal of international Conference on Electrical Vol.2 No.3
We examined the generation of harmonic voltage by a synchronous machine adding d-axis and q-axis harmonic field windings in order to reduce the harmonics in a power line. We derived the expressions of the armature voltage in the case of supplying the currents with the frequency nf to the d-axis and q-axis harmonic field windings. We constructed the synchronous machine adding the harmonic windings. In this paper, the expressions and the experimental results on the generation of harmonic voltages by the synchronous machine are presented.
Mukai, Eiichi,Fukai, Sumio,Kakinoki, Toshio,Yamaguchi, Hitoshi,Kimura, Yoshimasa Journal of International Conference on Electrical 2014 Journal of international Conference on Electrical Vol.3 No.2
We investigated the harmonic voltages generated by a synchronous machine adding d-axis and q-axis harmonic field windings to reduce the harmonics in a power line. First, electronic circuits such as a frequency multiplier, band-pass filter, and phase shifter were newly designed and made to carry out the experiment. Next, an experimental circuit, for which an AC voltage of frequency 6f synchronized to the power line voltage of frequency f could be obtained, was constructed to examine the generation of harmonic voltage in more detail. Finally, an experiment involving the generation of harmonic voltage was performed using an experimental synchronous generator with harmonic windings in the d-axis and q-axis. In this paper, the power spectrum and the waveforms of the harmonic voltages in the armature winding are presented. Moreover, the values calculated from theoretical expressions of harmonic voltages in armature winding are compared with the values obtained by the experiment.
PREPARATION OF SILICON OXIDE FILMS WITH HIGH WATER REPELLENCY BY RF PLASMA-ENHANCED CVD
Hinzumi, Atsushi,Sekoguchi, Hiroki,Kakinoki, Nobuyuki,Takai, Osamu 한국재료학회 1995 Fabrication and Characterization of Advanced Mater Vol.2 No.e3
Silicon oxide films contained fluoro-alkyl functions(FAFs ; $CF_3$, $CF_2$ and CF functions) were prepared on the polycarbonate(PC), glass and Si substrates by rf plasma-enhanced CVD(PECVD). The fluoro-alkyl silanes(FASs ; $CF_3(CF_2)nCH_2CH_2Si(OCH_3)_3, \;n=0, 5, 7)$ were used as raw materials. The substrate temperature during deposition was around $50^{\circ}C$. The obtained films had good water repellency. The maximum contact angle for a water drop was 107 degrees. The transmittance of the PC substrate was improved by the coating form 87% to 90%. These films also have a function as an antireflective coating.
Efficient polarized blue electroluminescent device using oriented p-sexiphenyl thin film
Yasuyuki Gotou,Izumi Kakinoki,Mitsuharu Noto,Masanao Era 한국물리학회 2005 Current Applied Physics Vol.5 No.1
Highly oriented p-sexiphenyl (6P) lm was successfully prepared by epitaxial-growth on rubbed 6P lm on hole-transportingpoly(9,90-dioctyluorene) (POF). Using the epitaxial-growth lm of 6P, we prepared tri-layered device, ITO/POF/epitaxial-growthlm of 6P/electron-transporting ozadiazole derivative (OXD7)/LiF/A1. The device with the epitaxial-growth lm of 6P as emissivelayer exhibited highly polarized and ecient blue electroluminescence (EL). EL peaking around 430 nm corresponded well tophotoluminescence of 6P lm. The maximum value of polarization ratioIp=Is of the blue EL was 37, whereIp and Is are EL intensityparallel and perpendicular to the orientation direction, respectively. The values of maximum luminanceLmax and maximum currenteciencygmax of the tri-layered device were enhanced comparing to those of a double-layered device ITO/6P/OXD7/LiF/Al;Lmax ¼ 146 cdm. 2 and gmax ¼ 0:41 cdA. 1 for the tri-layered device whereasLmax ¼ 32 cdm. 2 and gmax ¼ 0:07 cdA. 1 for thedouble-layered device