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排序方式: 共有147条查询结果,搜索用时 15 毫秒
1.
Watanabe Masahito Sato Fumiya Abe Raiki Ueda Kyosuke Matsuwaka Daisuke Kudo Fumiaki Narushima Takayuki 《Metallurgical and Materials Transactions B》2019,50(4):1553-1558
Metallurgical and Materials Transactions B - A two-step plasma arc melting process, comprising a first step under Ar-30 pct H2 gas flow and the second step under Ar gas flow, has been... 相似文献
2.
Jianglong Pu Fumiaki Ikegami Katsuki Nishikado Eika W. Qian 《International Journal of Hydrogen Energy》2017,42(31):19733-19743
NiRu bimetallic catalysts with different amount of CeO2 loaded on the γ-Al2O3 support were prepared. The properties of catalysts were characterized by means of N2 adsorption-desorption, XRD, H2-TPR and XPS techniques. Catalytic activities for the steam reforming of acetic acid over these catalysts were investigated at the temperature range from 650 °C to 750 °C. The addition of CeO2 dramatically improved the activity and stability of the catalyst. Among these catalysts, the NiRu/10CeAl catalyst showed the highest catalytic activity as well as a good stability owing to the abundant Ce3+ on the surface of catalyst. The existence of Ce3+ promoted the formation of CO2 from CO because of the mobilizable oxygen, which was favorable for the formation of hydrogen. The coke amount and species deposited on the catalysts after the activity tests were analyzed by DTG. As expected, the NiRu/10CeAl catalyst showed the best resistance to carbon formation. The temperature stepwise steam decoking experiment of the spent catalysts was conducted to elucidate the relationship between the existence of Ce3+ and the decoking abilities of various catalysts. It was verified that the existence of Ce3+ significantly promoted the decoking abilities of the catalysts. 相似文献
3.
Youngkook Kim Fumiaki MitsugiIkegami Tomoaki Kazuyuki HokamotoShigeru Itoh 《Journal of the European Ceramic Society》2011,31(6):1033-1039
Titanium dioxide (TiO2) bulk with pure anatase phases was fabricated by an explosive compaction technique using an underwater shockwave. Dynamic shock pressure of 6 GPa was used to consolidate anatase TiO2 powders. Its microstructural, crystalline structural and photocatalytic characteristics were observed and measured by various techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM) and photocatalytic activity measurement system. It was confirmed that the relative density of anatase TiO2 compact is about 96% (3.73 g/cm3) of the theoretical density (3.89 g/cm3) and a strong surface bonding between particles is formed by a shock energy. In X-ray diffraction analysis, high purity anatase phases, broadened peaks due to lattice defects and decreased crystallite size were found. For the photocatalytic activities, the anatase TiO2 compact was quite excellent compared to the commercial sintered TiO2 bulk. 相似文献
4.
Takayuki Kobayashi Akihiko Isayama Koichi Hasegawa Sadaaki Suzuki Shinichi Hiranai Fumiaki Sato Kenji Wada Kenji Yokokura Mitsugu Shimono Masayuki Sawahata Masayuki Terakado Jun Hinata Koji Takahashi Ken Kajiwara Yasuhisa Oda Keishi Sakamoto Katsumichi Hoshino Shinichi Moriyama 《Fusion Engineering and Design》2011,86(6-8):763-767
Structural, mechanical and optical design work on antennas/launchers for the electron cyclotron range of frequency heating and current drive system in JT-60 Super Advanced (JT-60SA) have been advanced based on a linear motion antenna concept. A CAD model of the launcher was built with realistic component sizes. A mock-up of the steering structure consisting of two different bellows sections for poloidal and toroidal beam scanning was fabricated to test movement of the bellows. The poloidal (?40° to +20°) and toroidal (?15° to +15°) injection angle ranges required in JT-60SA were shown to be realized by this steering structure and mirrors. 相似文献
5.
Abstract We studied the effects of the hydroxylation patterns and the degrees of polymerization of condensed tannins on their metal-chelating capacity. These effects were evaluated by the relative stability of aluminium complexes with proanthocyanidin. The relative stability of aluminium complexes was determined qualitatively in methanol solution by the competition with the metallochromic reagent (chrome azurol S). A comparison of these capacities indicates the following results: 1) phenolic hydroxy groups in tannins are essential sites for the chelation with metal. 2) the sites of tannins interacting with metal ions are mainly o-dihydroxyphenyl groups in B-ring. 3) increasing degrees of polymerization of tannins tends to increase the relative stability of condensed tannin-aluminium chelate. 相似文献
6.
Fumiaki Mitsugi Yoshihiro Umeda Norihiro Sakai Tomoaki Ikegami 《Thin solid films》2010,518(22):6334-1307
Recently, transparent conducting oxide thin films have attracted attention for the application to transparent conducting electrodes. In this work, we evaluated the uniformity of electrical, optical and structural properties for gallium doped zinc oxide thin films prepared on the 10 × 10 cm2 silica glass substrate by pulsed laser deposition. The resistivity, carrier concentration, mobility, bonding state and atomic composition of the film were uniform along in-plane and depth direction over the 10 × 10 cm2 area of the substrate. The film showed the average transmittance of 81-87%, resistivity of 1.4 × 10− 3 Ω cm, carrier concentration of 9.7 × 1020/cm3 and mobility of 5 cm2/Vs in spite of the amorphous X-ray diffraction pattern. The gradual thickness distribution was found, however, the potential for large-area and low temperature deposition of transparent conducting oxide thin film using pulsed laser deposition method was confirmed. 相似文献
7.
Steady-state fluorescence anisotropy of diphenylhexatriene and n-(9-anthroyloxy)stearic acids (n=2,12) in rat liver microsomes
showed a marked increase in the early stages of enzymatically or non-enzymatically induced lipid peroxidation. The changes
in fluorescence anisotropy occurred in parallel with the formation of thiobarbituric acid-reactive substances (TBA-RS). Parallel
to these changes, the fluorescence emitted from peroxidized microsomes increased markedly in the early stages of lipid peroxidation.
In contrast to the changes in the fluorescence anisotropy and in the formation of TBA-RS, the fluorescence showed a continuing
increase over the three hr period of lipid peroxidation. Glucose-6-phosphatase was inactivated in the early stages of lipid
peroxidation, whereas NADH-cytochrome b5 reductase underwent a slow deactivation over three hr. The apparently slow deactivation of the peripheral protein may be
explained by the formation of fluorescent substances. 相似文献
8.
Takafumi Kawaguchi Hiroyuki Nishimura Fumiaki Miwa Kazuhiro Abe Takashi Kuriyama Ikuo Narisawa 《Polymer Engineering and Science》1999,39(2):268-273
The environmental stress cracking (ESC) of acrylonitrile-butadiene-styrene (ABS) copolymer caused by a non-ionic surfactant (poly-oxyethylene alkylether) was studied by constant-load tensile creep tests and edge crack tension (ECT) tests. The fracture surfaces were investigated by a scanning electron microscope (SEM) and the morphology of the crack tip was investigated by a transmission electron microscope (TEM). It was found that the results of the creep tests performed in the non-ionic surfactant were very different from those performed in air. SEM images of the fracture surfaces showed that there were three different mechanisms of fracture and that specimens had a tendency to rupture by ESC when the stress was small. The results of the ECT tests and the TEM images showed that the change in the mechanism of the fracture was attributable to the change of morphology at the crack tip. 相似文献
9.
To unlock the full potential of evolution in digital media, a Tierra-like system using network-type assembly-like language
has been constructed. In the system, like Avida, digital creatures, self-replicating programs, live in a discrete 2D torus
space and an interaction between creatures is restricted locally. Bearing a genetic network in mind, network structure is
introduced. In the previous works, it is shown that the possibility that the network-type model has more potential of evolution
than a linear-type model like Avida in a simple environment. In this paper, to study the potential of evolution more precisely,
we model the effects of environment other than creatures. As one of the simplest models of such environment, the cost of execution,
i.e. executing time, is introduced. The difficult environment to live in costs high to execute instructions, the easy environment
does low. In computer experiments, we have investigated the influence of change in environment by analyzing the process of
evolution and diversity of the system. Experimental results show that the network-type system keeps more stable diversity
than the linear-type system does, even when the environment changes drastically. This indicates the possibility that the network-type
system has more potential of evolution than the linear-type system has.
This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January
31–February 2, 2008 相似文献
10.
Fumiaki Shiraishi 《程序员》2006,(9):34-39
对于如何提供补丁下载,单机PC游戏开发人员已经是轻车熟路了,这些补丁包里通常包含玩家需要手动更新的数据和二进制文件.但基本上.他们很少会为了补丁下载而创建一个“更新系统”。 相似文献