著者

Sadahiro Taizo Kuriyama Ken

出版者

山口大学工学部

雑誌

山口大学工学部研究報告 (ISSN:03727661)

巻号頁・発行日

vol.49, no.1, pp.165-167, 1998

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確率オートマトンの問題の中で現れるある組み合わせ的な性質をもつ集合を有限環Z/rZ上の加群として構成できることを示す。

著者

和泉 晴夫 三上 真人 小嶋 直哉

出版者

山口大学工学部

雑誌

山口大学工学部研究報告 (ISSN:03727661)

巻号頁・発行日

vol.49, no.1, pp.1-6, 1998-10

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気流を伴う消音器内で発生する気流音の特性は,流速や消音器構造に複雑に依存しており,共鳴音を含め音響学的解明は不十分である。本研究は,気流音の発生メカニズムを従来の研究よりさらに深く洞察するために,実験的に空胴部共鳴周波数と尾管部共鳴周波数の間に移行現象があることを認めたので,理論的考察の一方法として四端子定数で厳密計算し,周波数移行現象の予測と実験との対応を行い,発生機構の整理を行った。

著者

日高 照晃 石田 武 張 佑林 専徳 博文 笹原 政勝 谷岡 良弘

出版者

山口大学工学部

雑誌

山口大学工学部研究報告 (ISSN:03727661)

巻号頁・発行日

vol.39, no.1, pp.p93-100, 1988-10

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A strain wave gearing (commonly known as harmonic drive gearing) has been widely used as the reduction gear drive in industrial robots. Assembling an industrial robot system with an input motor, a strain wave gearing and an output arm, the amplitude of vibration in the robot system had been measured previously. Translating the robot system into an equivalent vibration model, the vibration occurred in the robot system was analyzed theoretically to compare the theoretical value with the experimental one and to determine the cause of the vibration with following result : The amplitude of the vibration occurred in the robot system was influenced by the variation of the spring stiffness and by the composite error in meshing, due to the machining and assembly errors of elements.

著者

小林 啓二 小嶋 直哉 福田 基一

出版者

山口大学工学部

雑誌

山口大学工学部研究報告 (ISSN:03727661)

巻号頁・発行日

vol.34, no.2, pp.p225-231, 1984-03

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An anechoic room for engine noise test was constructed. In constructing it, the sound absorbing wall with its supporting structures was carefully designed because their strong influence on the performance of the anechoic room. The back ground noise, the inverse square law and the mean absorption coefficient of this room were examined in detail. From these experimental results, it was confirmed that this anechoic room showed the sufficient characteristics for the experimental researches on noise generation from running engines.

著者

上本 健治 甲斐 博文 金岡 泰保 富田 真吾 岡田 敏彦

出版者

山口大学工学部

雑誌

山口大学工学部研究報告 (ISSN:03727661)

巻号頁・発行日

vol.32, no.2, pp.p315-317, 1982-03

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In syntactic pattern recognition, the grammatical inference is the process that characterizes a pattern class by a grammar. So establishment of grammatical inference procedure is very important. In this paper, for the purpose of the recognition of hand-written Katakana characters, we suggest a grammatical inference algorithm for context free grammar. Our inference is developed by selecting sample patterns from original set of sample patterns according to a criterion, and classifying the production rules previously.

著者

渡部 哲夫 石原 好宏

出版者

山口大学

雑誌

山口大学工学部研究報告 (ISSN:03727661)

巻号頁・発行日

vol.30, no.1, pp.131-142, 1979-10

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This paper describes supporting software which permits the facile utilization of the M345 colored-character display unit which is connected to the MELCOM 9100/30F in our department. The basic software which the computer maker has provided us enables us to utilize M345 only when programs are written in assembly language. Programming in this language is rather troublesome job. Thus we designed and built supporting software which enables us to write programs in FORTRAN utilizing M345 directly and to command it in job control language. This supporting software aims primarily at facilitating conversational operation utilizing the M345. Secondary aim is the simplification of operations such as input and output of data, file editing, and console operation through the M345.

著者

中園 眞人 山本 幸子 大内 裕子

出版者

山口大学工学部

雑誌

山口大学工学部研究報告

巻号頁・発行日

vol.54, no.1, pp.49-57, 2003-10

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There are many vacant houses in rural districts, but these housing stocks are not used effectively. Then, it has the fear that the housing system for vacant houses isn't functioned efficiently. The purpose of this research is to clear the present role of the system. The investigation of the improvement of these houses and living style of the dwellers was done. The main systems can be sorted in three types and the difference of the contents of improvement and living style is analyzed.

出版者

山口大学工学部

雑誌

山口大学工学部研究報告

巻号頁・発行日

vol.60, no.2, pp.57-61, 2010-02

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As facilities maintained in the urban renewal business, the city in Japan is seen from the aspect "Third Place" that sociologist Ray Oldenburg of the United States advocated, it overemphasizes to the house and the office, and third Place is extremely few. "Present age cafe" that has developed in the Japanese original culture scattered in the inside and the city of such a situation has the possibility of functioning as third Place. Therefore, it is assumed to be a purpose to do the research that pays attention to "Present age cafe", and to clarify whether it is effective as third Place by this study.

著者

角田 哲也 望月 信介 大坂 英雄

出版者

山口大学

雑誌

山口大学工学部研究報告 (ISSN:03727661)

巻号頁・発行日

vol.40, no.2, pp.331-337, 1990-03

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The effect of the separating shear layer characteristics on the structure of the flow downstream of the reattachment region of a backward-facing step is examined using wall pressure distribution and mean velocity data at a unit Reynolds number of 9.92×(10)^5m^<-1>. The reattachment length X_R/h is 6.78 in this study. Log plots of the mean velocity profiles downstream of reattachment show that the disturbance in the boundary layer is primarily in the outer part of the log region. The inner part of the profile relaxed rather quickly.

著者

福田 基一 和泉 晴夫

出版者

山口大学

雑誌

山口大学工学部研究報告 (ISSN:03727661)

巻号頁・発行日

vol.16, no.1, pp.71-76, 1965-11

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To examine the effects of length of an exhaust pipe and engine speed in a small four-stroke cycle engine, the authors have measured the output of the engine and analysed some pressure diagrams for the exhaust pipe. Some conclusions obtained in such experiments are summarized as follow : 1) The maximum output occurs on account of the innertia effect of the exhaust system. 2) The maching conditions are expressed approximately by the following equation Q=cθ/12kNl where c : mean sonic velocity in exhaust system θ : period of exhaust port opening k : maching factor N : engine speed, r.p.m.l : length of exhaust pipe+correction value of open end. The maximum output occurs in case of Q≒1.

著者

森竹 一之 高浪 五男 井上 克司 谷口 弘

出版者

山口大学

雑誌

山口大学工学部研究報告 (ISSN:03727661)

巻号頁・発行日

vol.31, no.1, pp.89-97, 1980-10

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A tablet input device (BID PAD) manufactured by Summagraphics Corp. is connected with a popular personal computer APPLE II which has high resolution graphic function. The system can input pictures from the tablet and display them on color TV screen. As software, drawing, painting, squaring, line drawing, and shaping routines are developed. The total program list is given.

著者

呉 景龍 佐々木 英人 川村 貞夫

出版者

山口大学

雑誌

山口大学工学部研究報告 (ISSN:03727661)

巻号頁・発行日

vol.49, no.1, pp.21-27, 1998-10

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一般に,触覚形状情報を呈示することは困難である。一方,心理学の研究より人間の視触覚は錯覚・融合特性が存在している。つまり,人間は正確な触覚情報を呈示されていなくとも視触覚を通じて実物体の曲面を認識している。そこで,人間の視触覚の錯覚・融合特性を利用して触覚ディスプレイの簡略化を図ることができる。このような目的から人間の視触覚融合領域を調べ,定量的に解析した。この結果に基づいて,4種類の曲率パターンをもった触覚ユニットが作られている。本研究では,親指,人差し指および中指を用いて物体を掴む場合を想定している。これらの指の軌道を測定し,軌道モデルを設計した。さらに,軌道モデル上を移動する機構や回転する機構をもつ3個の触覚ユニットをもった触覚形状呈示装置を試作した。