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71.
72.
Tsutomu Nagata Yoichi Nagata Hirokazu Koshimitsu 《Computers & Industrial Engineering》1993,24(4):561-569
The position of a production management system in a computer-integrated manufacturing (CIM) system is to serve as the nucleus of the plant CIM system that connects the plant production to other departments such as marketing, research and development, and distribution departments. A production management system that integrates the flow of goods with information in a plant, and thus manages production in it, was developed as the first step toward application of CIM to a powder plant. The method of building a distributed system is one way to build a CIM system. This method creates a system in the required function units, which are connected by a network to expand the system function. It offers advantages in extensibility, flexibility, and rapid implementation. 相似文献
73.
Daisuke Hiramatsu Kaoru Koyanagi Kaiichirou Hirayama Yoichi Uemura Mikio Kakiuchi Toshiyuki Satoh Akahiro Ara 《Electrical Engineering in Japan》2005,153(3):31-40
This paper describes the effect of mutual leakage reactance in the rotor circuit on the analysis of generator transient characteristics. The authors derive a detailed equivalent circuit model for a 48P‐15,750‐kVA generator, analyze sudden short circuits and asynchronization phenomena of the generator by simulations with an electromagnetic transients program (ATP‐EMTP), and compare the results with experimental data. © 2005 Wiley Periodicals, Inc. Electr Eng Jpn, 153(3): 31–40, 2005; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20147 相似文献
74.
A Wells turbine for wave power conversion has hysteretic characteristics in a reciprocating flow. The hysteretic loop is opposite to the well-known dynamic stall of an airfoil. In this paper, the mechanism of the hysteretic behavior was elucidated by an unsteady 3-dimensional Navier-Stokes numerical simulation. It was found that the hysteretic behavior was associated with a streamwise vortical flow appearing near the blade suction surface. The effects of hub-to-tip ratio and tip clearance on the hysteretic characteristics of the Wells turbine have also been discussed in this paper. 相似文献
75.
Yuichi Tamura Ikuya Sato Hisao Kubota Hisayoshi Ohta Yoichi Hori 《Electrical Engineering in Japan》2003,145(4):78-87
The objective of this investigation is to stabilize a sensorless vector control system of induction motors by means of an adaptive observer in regenerating mode at very low speed. The adaptive observer gain is designed by means of the Routh–Hurwitz criterion. It is verified by simulation and experiment that the proposed system is stable. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 145(4): 78–87, 2003; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10202 相似文献
76.
Yoichi Tominaga 《Electrochimica acta》2005,50(19):3949-3954
We have synthesized mesoporous silica (MPSi) as a novel type of inorganic filler for polyether-based electrolytes and have characterized the effect of addition on ionic conduction. Both poly(ethylene oxide) (PEO) and PMEO composites filled with MPSi showed higher ionic conductivity than the original and the composites filled with particle silica (pSiO2). It was considered that the increase is caused by the difference in the surface area between MPSi and pSiO2. In the PEO composites, the addition of MPSi gave rise to the reduction of crystal PEO and crystalline complex domains. The glass transition temperature of the PMEO composites increased with the addition of the MPSi, in spite that the conductivity increased with increasing the filler contents. It has been suggested that the Lewis acid-base interactions between ions, ether chains and filler surface strongly affect on the ionic conduction in the composite electrolytes. 相似文献
77.
Kentaro Shinoda Atsushi Yamada Makoto Kambara Yoichi Kojima Toyonobu Yoshida 《Journal of Thermal Spray Technology》2007,16(2):300-305
The deformation of plasma-sprayed alumina droplets of 35-55 μm diameter d with an impact velocity of around 90 m/s has been investigated over various micro-patterned substrates with an arithmetic
mean roughness of 0.5 μm. On a line-and-space pattern, droplets exhibited elliptical splats extending in the direction perpendicular
to the line, when the normalized pattern spacing λ (= x/d) was 0.1-0.3, where x is the pattern spacing. The fingering of the splats was also caused by a concave pattern as well as by a convex pattern and
the number of fingers significantly increased at λ = 0.2. In addition, holes suggesting air entrapment were observed off center
in the bottom side of each splat by approximately 1.5 times the radius of the droplets, regardless of the pattern. These results
suggest the importance of the surface design of substrate on the micrometer scale in plasma spraying. 相似文献
78.
79.
Cyclic voltammograms of hexaamminecobalt complex have been measured in high pH solutions. The spectroscopic result suggested that hydroamminecobalt complex adsorbed on the electrode surface during cathodic polarization, and this species grew to form cobalt hydroxide after a long time of electrolysis. In the anodic process, the reaction orders for pH and NH3 were both |1|. Based on these results, the reaction mechanism has been discussed.The effect of light on the electrode process has been studied by irradiating with ultraviolet light of the 254 nm mercury resonance line. It has been indicated that the hydroxoammine complex is decomposed to cobalt hydroxide and free ligand under light. 相似文献
80.
Taher Sharshar Kotoyuki Okano Yoichi Kawase 《Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms》1992,70(1-4):259-264
The basic characteristics of a N2-jet system coupled with a surface-ionization type ion source have been investigated at KUR-ISOL. The yields of transported activities and ionized ions have been measured under various conditions for both the He- and N2-jets. The effects of N2 gas upon the ionization and skimmer efficiency have been investigated. It was found that N2 gas has almost no effect upon the ionization efficiency, but causes poorer skimmer efficiency than He gas owing to the large opening angle of aerosol particles at the outlet of a capillary. A mixture of He and N2 gases was also tested. 相似文献