排序方式: 共有25条查询结果,搜索用时 15 毫秒
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Eguchi K Enomoto S Furuno K Goldman J Hanada H Ikeda H Ikeda K Inoue K Ishihara K Itoh W Iwamoto T Kawaguchi T Kawashima T Kinoshita H Kishimoto Y Koga M Koseki Y Maeda T Mitsui T Motoki M Nakajima K Nakajima M Nakajima T Ogawa H Owada K Sakabe T Shimizu I Shirai J Suekane F Suzuki A Tada K Tajima O Takayama T Tamae K Watanabe H Busenitz J Djurcic Z McKinny K Mei DM Piepke A Yakushev E Berger BE Chan YD Decowski MP Dwyer DA Freedman SJ Fu Y Fujikawa BK Heeger KM Lesko KT Luk KB Murayama H 《Physical review letters》2003,90(2):021802
KamLAND has measured the flux of nu;(e)'s from distant nuclear reactors. We find fewer nu;(e) events than expected from standard assumptions about nu;(e) propagation at the 99.95% C.L. In a 162 ton.yr exposure the ratio of the observed inverse beta-decay events to the expected number without nu;(e) disappearance is 0.611+/-0.085(stat)+/-0.041(syst) for nu;(e) energies >3.4 MeV. In the context of two-flavor neutrino oscillations with CPT invariance, all solutions to the solar neutrino problem except for the "large mixing angle" region are excluded. 相似文献
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Migaku Takahashi T. Shimatsu M. Suekane M. Miyamura K. Yamaguchi H. Yamasaki 《Journal of magnetism and magnetic materials》1993,120(1-3):229-231
Magnetic torque analysis has been carried out for CoNiPt, CoCrTa/Cr and CoCrPt/Cr thin-film media. The magnetic field Hgraink, where the rotational hysteresis loss vanishes, remained almost constant in each material, independent of the coercive force Hc. Only in the CoCrTa media no clear correlation between the rotational hysteresis integral and Hc was observed. 相似文献
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Water imbibition during the waterflooding process of oil production only sweeps part of the oil present. After water disrupts
the oil continuity, most oil blobs are trapped in porous rock by capillary forces. Developing an efficient waterflooding scheme
is a difficult task; therefore, an understanding of the oil trapping mechanism in porous rock is necessary from a microscopic
viewpoint. The development of microfocused X-ray CT scanner technology enables the three-dimensional visualization of multiphase
phenomena in a pore-scale. We scanned packed glass beads filled with a nonwetting phase (NWP) and injected wetting phase (WP)
in upward and downward injections to determine the microscopic mechanism of immiscible displacement in porous media and the
effects of buoyancy forces. We observed the imbibition phenomena for small capillary numbers to understand the spontaneous
imbibition mechanism in oil recovery. This study is one of the first attempts to use a microfocused X-ray CT scanner for observing
the imbibition and trapping mechanisms. The trapping mechanism in spontaneous imbibition is determined by the pore configuration
causing imbibition speed differences in each channel; these differences can disrupt the oil continuity. Gravity plays an important
role in spontaneous imbibition. In upward injection, the WP flows evenly and oil is trapped in single or small clusters of
pores. In downward injection, the fingering phenomena determine the amount of trapped oil, which is usually in a network scale.
Water breakthrough causes dramatic decrease in the oil extraction rate, resulting in lower oil production efficiency. 相似文献
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Suekane T. Yoshikawa K. Kabashima S. 《IEEE transactions on plasma science. IEEE Nuclear and Plasma Sciences Society》1995,23(1):97-102
Two dimensional calculations were carried out to clarify the behavior of boundary layer and its effects on performance of closed cycle MHD (CCMHD) generator and to investigate the relation between enthalpy extraction ratio and adiabatic efficiency. Calculation results suggest that the large Lorentz force causes propagation and separation of boundary layer where reverse current flows, because of small electromotive force. For large load resistance boundary layer becomes very thick and the eddy current arises in broad region. The push work of working gas against Lorentz force is effectively converted into electric energy under the condition at which the Lorentz force decelerates the working gas to Mach number in the range between 1.0 and 1.5 in this case of the generator. Stagnation pressure loss increases with load resistance until enthalpy extraction ratio takes maximum value. The entropy production due to Joule heating and viscosity increases with load resistance. The difference between the load resistances for which the enthalpy extraction ratio and the adiabatic efficiency take maximum value can be explained with the entropy production of Joule heating and viscosity 相似文献
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Murakami T. Suekane T. Okuno Y. Kabashima S. 《IEEE transactions on plasma science. IEEE Nuclear and Plasma Sciences Society》1997,25(1):7-14
Nonequilibrium plasmas with cesium metal vapor ionization in helium and argon gases at moderate pressures are excited with microwave power. The structures and behaviour of the seeded plasmas are experimentally examined, particularly under the condition of Full seed (cesium atoms) ionization. By cesium seeding, the minimum power sustaining the plasma is reduced markedly, and both a broad plasma observed in pure helium and unsteady filament-like plasmas in pure argon change to the steady and broad plasma locating close to the inner surface of a discharge tube, it is revealed from the electron temperature measurements that the plasma can be in the regime of full seed ionization for suitable microwave powers, where the electron density is kept almost constant. The thickness of the fully ionized seed (FIS) plasma decreases with increasing the mole fraction of cesium vapor, and is almost independent of noble gas pressure. The thickness almost coincides with the skin depth determined from the electrical conductivity almost uniform in the FIS plasma. These facts suggest that the FIS plasma will be easily produced and maintained as long as the microwave power is consumed to the electron heating 相似文献
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Abe K Amako K Arai Y Asano Y Chiba M Chiba Y Daigo M Emura T Endo I Fukawa M Fukui T Fukushima Y Haba J Haidt D Hayashibara I Hemmi Y Higuchi M Hirose T Hojyo Y Homma Y Hoshi Y Ikegami Y Ishihara N Kamitani T Kanematsu N Kanzaki J Kikuchi R Kondo T Koseki T Kubo K Kurashige H Matsui T Minami M Miyake K Mori S Nagashima Y Nakamura T Nakano I Odaka S Ogawa K Ohama T Ohsugi T Ono A Osabe H Saito H Sakae H Sakamoto H Sakamoto S Sakano M Sakuda M Sasao N Sato M Shioden M Shirai J Suekane F 《Physical review letters》1988,61(8):915-918
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F. Suekane 《Progress in Particle and Nuclear Physics》2010,64(2):178-180
Since the energy of a reactor neutrino is a few MeV, all , and oscillations are accessible by reactor neutrino experiments. KamLAND observed the oscillation and currently Double Chooz, RENO and Dayabay experiments are under construction aiming to detect oscillation. There are still good prospects for future reactor neutrino experiments after them. For example, there is room to further improve sin22θ13 accuracy at a baseline of ∼1.5 km, a very precise sin22θ12 measurement and the determination of mass hierarchy may be possible at a baseline ∼50 km, and if KamLAND is enlarged to the SuperKamiokande size, better measurement of and sin22θ12 will be anticipated. It is important to take into account such possibilities when planning future neutrino program after θ13 is measured by current experiments. 相似文献