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991.
Satoshi Ihara Taiki Hirohata Yuichi Kominato Chobei Yamabe Hideaki Ike Kazunori Hakiai Kazuya Hirabayashi Masaaki Tamagawa 《Electrical Engineering in Japan》2014,186(4):1-10
A new method of wastewater treatment using electric discharge in the water cavitation field formed by a large number of micro bubbles generated by high‐speed water flow is proposed in this paper. Indigo carmine solution, which is a type of dye, with a concentration of 9 mg/liter was used as the specimen solution for demonstration of water treatment. The total volume of solution and the average speed of solution in the cavitation field were 20 liters and about 7.4 m/s, respectively. An absorbance decrease rate of 96% was obtained in 50 min of treatment time at the electrode distance of 2 mm and discharge power of 16 W. It was also found that the efficiency of decolorization was improved by changing the electrode location. © 2013 Wiley Periodicals, Inc. Electr Eng Jpn, 186(4): 1–10, 2014; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.22483 相似文献
992.
Tatsuya Kawada Tomohisa Masumitsu Yuta Kimura Satoshi Watanabe Shin-ichi Hashimoto Keiji Yashiro Koji Amezawa 《Journal of Electroceramics》2014,32(1):78-85
Effect of mechanical stress on defect equilibrium was studied with an oxygen nonstoichiometric compound, La0.6Sr0.4Co0.2Fe0.8O3-δ . In general, formation of oxygen vacancy in an oxide causes lattice expansion, which leads to stabilization of oxygen vacancy in the material under a tensile stress, and vice versa. Oxygen vacancy concentration is thus expected to increase under a tensile stress and decrease under a compressive stress. However, the change in defect concentration would not proceed spontaneously so that the material just after the application of stress would stay out of equilibrium. On this assumption, attempts were made to detect the shift of oxygen potential under stress using a potentiometric method. A ball-shaped yttria stabilized zirconia (YSZ) of 9.5 mm in diameter was utilized as an oxygen potential sensor as well as a pushing rod which was pressed onto the sample surface. In the measurements at 873 K to 1073 K, a clear shift of emf to the negative direction was observed depending on the magnitude of load and loading speed. It was followed by a relaxation to the initial value under the stress. On unloading operation, the shift of emf to the positive direction was observed. Those behaviors were well explained by the assumption that the oxygen vacancy concentration varies under mechanical stress. 相似文献
993.
Satoshi Kitaoka Makoto Tanaka Naoki Kawashima Taishi Ito Daisaku Yokoe Takeharu Kato Takafumi Ogawa Naoki Yamazaki Nagisa Hosoya Takeshi Nakamura 《Journal of the American Ceramic Society》2023,106(8):4863-4876
The degradation of ytterbium aluminum garnet (YbAG) exposed to molten Ca–Mg–Fe–Al–Si–O (CMAS) at 1673 K was investigated for two kinds of dense polycrystalline YbAG with compositions deviating slightly from stoichiometry, referred to as Al- and Yb-rich. The mitigation of the CMAS attack for Yb-rich YbAG was markedly superior to that for the Al-rich one. For both types of YbAG, corrosion progressed due to the preferential penetration of the CMAS melt along grain boundaries in the thickness direction and the simultaneous dissolution of crystal grains into the melt. The lower of the corroded region consisted of YbAG crystals with a core/shell-I/shell-II structure. Shell-I contained alkaline earth, silicon, and iron cations, whereas these cations were hardly detected in shell-II. Growth of the shell-I region was considered to progress by dissolution and reprecipitation through the melt existing around it, and finally, the melt disappeared, resulting in the formation of a thin shell-II region containing little of these ions. The formation and growth of the shell-I region were found to be promoted by making the YbAG Yb-rich, resulting in enhancement of the resistance to CMAS. 相似文献
994.
Takayuki Nakane Satoshi Ishii Tetsuo Uchikoshi Takashi Naka 《Journal of the American Ceramic Society》2023,106(4):2317-2325
We report a systematic evaluation of the magnetic properties of FeAl2O4 focusing on the relationship between the fabrication conditions and its structural characteristics, in order to improve ceramics processing in applications of this material. For this purpose, the most important factor to control is the inversion parameter, expressed as y in the (Fe1−yAly)(Al1−y/2Fey/2)2O4 composition, which is relatively high for the spinel aluminate of a transition metal. The magnetic properties of these samples all show the spin glass phenomenon at low temperatures, and the cusp temperature depends systematically on this y value. This means that the evaluation of these magnetic properties will be an effective way to predict some characteristics of product FeAl2O4. Additionally, this study found an anomaly in the structural and magnetic characteristics of FeAl2O4 fabricated at a low temperature. This is thought to originate in a tiny and a small amount of impurity. It will be key for discussing the quality of chemically synthesized FeAl2O4, which is typically produced at low temperatures. 相似文献
995.
Masaya Fujioka Melbert Jeem Kento Sato Masashi Tanaka Kazuki Morita Taizo Shibuya Kiyonori Takahashi Suguru Iwasaki Akira Miura Masanori Nagao Satoshi Demura Hideaki Sakata Madoka Ono Hideo Kaiju Junji Nishii 《Advanced functional materials》2023,33(10):2208702
Intercalation into 1D transition metal trichalcogenides (TMTs) in which fibers are bonded by a weak van der Waals force can be expected to create various intercalation compounds and develop unique physical properties according to the combination of the host materials and guest ions. However, structural changes via intercalation into 1D TMTs are not as simple as those in 2D transition metal dichalcogenides (TMDs) and are still not understood comprehensively. ZrTe3: a typical compound with a 1D trigonal prismatic structure, belongs to TMTs. Herein, through the Ag introduction to ZrTe3 via solid-state intercalation, a novel crystal phase with a 1D octahedral structure and a quasi-amorphous (QA) phase during the structural transition are discovered; the QA phase is a novel state of matter in which long-range order is lost while retaining 1D order. Based on the Ag concentration, the transport properties are flexibly modulated from superconductivity to semiconductivity. Density functional theory calculations indicate the attraction between Ag ions and the pair diffusion due to their attraction. Furthermore, judging the attraction or repulsion between guest ions predicts whether to induce a QA phase or simple lattice expansion like the intercalation into 2D TMDs. 相似文献
996.
997.
Yao Cui Mir Majaid Manzoor Hongtao Liu Satoshi Yamada 《The Structural Design of Tall and Special Buildings》2023,32(4):e1999
Roof joint connects the upper roof structure to the lower RC columns in large-span structures. However, during several earthquakes, concrete edge failure of roof joint observed in several previous earthquakes shows potential collapse damage of the large-span structures. This paper presents an experimental and numerical study on the performance of roof joints under quasi-static cyclic loading. The effects of concrete edge distance of anchor rods and using horizontally slotted holes in the base plate were investigated and discussed by means of ultimate shear resistances, failure modes, hysteretic responses, anchor strains, and stirrup strains. It was found that concrete edge failure was prone to occur if the edge distance was taken as per current design practice. However, with the use of slotted holes in the base plate, the concrete edge failure could be suppressed due to the sliding between the base plate and the mortar layer. A refined theoretical model was proposed to evaluate the ultimate shear resistance and predict the failure mode. Finite Element Models (FEMs) were also developed to verify the proposed theoretical model in terms of the ultimate shear resistance and the failure mode under both monotonic and cyclic loading. 相似文献
998.
Satoshi Ishii Min-Wen Yu Kuo-Ping Chen Tadaaki Nagao 《Advanced Materials Interfaces》2023,10(1):2201751
A plasmonic nanostructure forming a metal-semiconductor interface generates electric potential by optical illumination. Grounded plasmonic nanostructures can also generate electric potentials based on the recently demonstrated plasmoelectric effect that allows all metallic photoelectric devices to be fabricated and is capable of generating negative and positive potentials at off-resonance by merely tuning the illumination wavelength. However, to date, the plasmoelectric effect has been observed only with gold and silver. In this study, the generation of plasmoelectric effect by zirconium nitride (ZrN) is experimentally demonstrated, which is a nonmetallic plasmonic material. The Kelvin probe force microscope measurements demonstrate that ZrN nanodisk arrays fabricated through e-beam lithography and dry etching exhibit characteristic potential sign changes of the plasmoelectric potential. The features of the wavelength-dependent potential shifts in the experiments agree with the numerical calculations. It is anticipated that the plasmoelectric effect can be observed in other non-metallic plasmonic materials and these studies may lead to robust photoelectric devices working at off-resonances. 相似文献
999.
Kaneko Ryutaro Nakamura Yuji Morita Ryosuke Ito Satoshi 《Artificial Life and Robotics》2023,28(2):314-322
Artificial Life and Robotics - When using an autonomous mobile robot, an environmental map should be created in advance. In this study, we propose a method for creating a point cloud data (PCD) map... 相似文献
1000.
Load balancing strategies for a parallel ray-tracing system based on constant subdivision 总被引：1，自引：1，他引：0
Hiroaki Kobayashi Satoshi Nishimura Hideyuki Kubota Tadao Nakamura Yoshiharu Shigei 《The Visual computer》1988,4(4):197-209
Static and dynamic load balancing strategies for a multiprocessor system for a ray tracing algorithm based on constant subdivision are presented. An object space is divided into regular cubes (subspaces), whose boundary planes are perpendicular to the coordinate axes, and these are allocated to the processors in the system. Here, load balancing among the processors is the most important problem. Firstly, in a category of static load balancing, strategies for mapping the subspaces into the processors are evaluated by simulation. Moreover, we propose a hierarchical multiprocessor system in order to realize dynamic load balancing with the static one. Its architecture can overcome the limitation of the static load balancing in a large scale multiprocessor system. 相似文献