Search Results - "Oyama, Akira"

Multiobjective Evolutionary Topology Optimization Algorithm Using Quadtree Encoding by Nimura, Naruhiko, Oyama, Akira

“…A multiobjective high-degree-of-freedom design optimization algorithm that enables topological changes in design is proposed for multiobjective aerodynamic…”
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Benchmarking Multi- and Many-Objective Evolutionary Algorithms Under Two Optimization Scenarios by Tanabe, Ryoji, Ishibuchi, Hisao, Oyama, Akira

“…Recently, a large number of multi-objective evolutionary algorithms (MOEAs) for many-objective optimization problems have been proposed in the evolutionary…”
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Special issue on new developments in the field of design and systems engineering 2020 by Akira OYAMA

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Dominant parameters for maximum velocity induced by body-force models for plasma actuators by Kawai, Shigetaka, Bouwhuis, Thijs, Abe, Yoshiaki, Yakeno, Aiko, Nonomura, Taku, Aono, Hikaru, Oyama, Akira, Hoeijmakers, Harry W. M., Fujii, Kozo

“…This study investigates the relationship between body-force fields and maximum velocity induced in quiescent air for development of a simple body-force model…”
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Simultaneous structure design optimization of multiple car models using multiobjective evolutionary algorithm and FEM structure analysis by Akira OYAMA, Takehisa KOHIRA, Tomoaki TATSUKAWA, Takeshi WATANABE, Hiromasa KEMMOTSU

“…A design system for simultaneous structure design optimization of multiple car models is developed and applied to a simultaneous design optimization of MAZDA…”
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Aerodynamic performance of control surfaces on Mars airplane balloon experiment two by Masahiro KANAZAKI, Kai TOMISAWA, Koji FUJITA, Akira OYAMA, Hiroki NAGAI

“…We redesigned the Mars Airplane Balloon Experiment Two (MABE-2) based on MABE-1 to improve the vehicle’s stability and controllability. Following the redesign,…”
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Control surface effectiveness of low Reynolds number flight vehicles by Masayuki ANYOJI, Masato OKAMOTO, Hidenori HIDAKA, Katsutoshi KONDO, Akira OYAMA, Hiroki NAGAI, Kozo FUJII

“…Low-speed wind tunnel tests are carried out to investigate the control surface effectiveness at low Reynolds numbers (Re = 20,000-80,000). A thick airfoil,…”
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Gegenbauer reconstruction method with edge detection for multi-dimensional uncertainty propagation by Kawai, Shigetaka, Yamazaki, Wataru, Oyama, Akira

“…This paper proposes an edge-detection-based method for discontinuous functions in multi-dimensional uncertainty propagation problems. We develop the Gegenbauer…”
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An Effective Three-Dimensional Layout of Actuation Body Force for Separation Control by Kaneda, Ittetsu, Sekimoto, Satoshi, Nonomura, Taku, Asada, Kengo, Oyama, Akira, Fujii, Kozo

“…We conducted large eddy simulations of the control of separated flow over an airfoil using body forces and discuss the role of a three-dimensional vortex…”
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Crosstalk of Prolyl Isomerases, Pin1/Ess1, and Cyclophilin A by Fujimori, Fumihiro, Gunji, Wataru, Kikuchi, Junko, Mogi, Tomoko, Ohashi, Yoko, Makino, Tohru, Oyama, Akira, Okuhara, Koji, Uchida, Takafumi, Murakami, Yasufumi

“…Previous studies have indicated that Ess1/Pin1, a gene in the parvulin family of peptidyl-prolyl isomerases (PPIases), plays an important role in regulating…”
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Quantitative evaluation of the acoustic waves generated by a supersonic impinging jet by Kato, Daisuke, Nonomura, Taku, Oyama, Akira

“…Strong acoustic waves are generated when rocket launch. The accurate prediction of these acoustic waves are important for the design of the rocket launch site…”
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Computational Study on Effect of Synthetic Jet Design Parameters by Okada, Koichi, Oyama, Akira, Fujii, Kozo, Miyaji, Koji

“…Effects of amplitude and frequency of synthetic jet on the characteristics of induced jet are investigated. To estimate effects of the parameters, flow inside…”
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Role of the deep parasitic bipolar device in mitigating the single event transient phenomenon by Mikami, N., Nakauchi, T., Oyama, A., Kobayashi, H., Usui, H.

“…It was found that the single event transient (SET) phenomenon in logic circuits strongly depends on doping concentrations. We think that two parasitic bipolar…”
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Exophora Resolution of Linguistic Instructions with a Demonstrative based on Real-World Multimodal Information by Oyama, Akira, Hasegawa, Shoichi, Nakagawa, Hikaru, Taniguchi, Akira, Hagiwara, Yoshinobu, Taniguchi, Tadahiro

“…To enable a robot to provide support in a home environment through human-robot interaction, exophora resolution is crucial for accurately identifying the…”
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Control of dynamic flowfield around a pitching NACA633−618 airfoil by a DBD plasma actuator by Fukumoto, Hiroaki, Aono, Hikaru, Watanabe, Takeshi, Tanaka, Motofumi, Matsuda, Hisashi, Osako, Toshiki, Nonomura, Taku, Oyama, Akira, Fujii, Kozo

“…•The flow around a pitching NACA633-618 airfoil is controlled by a plasma actuator.•Impacts of a plasma actuator on the aerodynamic performances are studied.•A…”
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A Dual-Polarization X -Band Traveling-Wave Antenna Panel for Small-Satellite Synthetic Aperture Radar by Ravindra, Vinay, Akbar, Prilando Rizki, Miao Zhang, Hirokawa, Jiro, Saito, Hirobumi, Oyama, Akira

“…This paper investigated the possibility of using an X-band traveling-wave antenna for application in synthetic aperture radar (SAR) on a small-satellite…”
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Analysis of nozzle geometry effect on supersonic jet noise using Schlieren by Ozawa, Yuta, Oyama, Akira, Anyoji, Masayuki, Mamori, Hiroya, Fukushima, Naoya, Yamamoto, Makoto, Fujii, Kozo

“…Strong acoustic waves emitted from rocket plume might damage to rocket payloads because rocket payloads consist of fragile structure. Therefore, it is…”
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Computational analysis of aeroacoustic noise generated from a rotating tire with a longitudinal groove by Kato, Daisuke, Lee, Gonghwi, Abe, Yoshiaki, Nonomura, Taku, Oyama, Akira, Fujii, Kozo, Ikeda, Toshiyuki, Koishi, Masataka

“…It is known that acoustic waves which is higher than 1000 Hz are generated from a rotating tire, and one possibility of their generation mechanism is…”
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Large eddy simulations of acoustic waves generated from hot and cold supersonic jets at Mach 2.0 by Nakano, Hiroaki, Nonomura, Taku, Oyama, Akira, Mamori, Hiroya, Fukushima, Naoya, Yamamoto, Makoto

“…Strong acoustic waves are generated from the rocket plumes in the supersonic jet condition. The acoustic waves are significantly affected by temperature of…”
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Progress in design optimization using evolutionary algorithms for aerodynamic problems by Lian, Yongsheng, Oyama, Akira, Liou, Meng-Sing

“…Evolutionary algorithms (EAs) are useful tools in design optimization. Due to their simplicity, ease of use, and suitability for multi-objective design…”
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