Hiroshima Institute of Technology Academic Repository
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DVD-RAMの再生誤りのモデル化
Get PDFapplication/pdfCDやDVDなどの家庭用光ディスクストレージはその取り扱い過程で発生する指紋、ゴミ、傷などによるデータ信頼性の劣化が危惧され、データの信頼性確保のための技術的課題の明確化と対応が必要である。今回は、懸案事項の一つ、誤り発生状況の把握をおこない、誤りのモデル化を検討した。DVD-RAMの指紋誤りにおける誤り状態をビット単位で計測し、ギルバートモデルへの適応評価をおこなった。単純モデルは誤り(light)では良く一致するが、誤り(hard)ではモデル計算値と実測値との誤差が大きくなり、変形モデルを適用することにより良い近似結果を得ることできた。conference pape
Study on restoring force characteristics of T-shaped beam-to-column connection jointed by new joint system
Get PDFapplication/pdfIn this paper, an experimental study on beam-to-column connections subjected to cyclic loadings was carried out. Three types of T-shaped specimens were employed for the loading tests. The following conclusions were drawn from the experimental results. 1) A connection with non-compression knee braces shows bi-linear restoring force characteristics. 2) A connection using normal-strength bolts with a wedge device possesses self-centering capability. 3) A self-centering connection with non-compression knee-braces is applicable to a sustainable structure having all elastic members except the knee-braces and bolts.departmental bulletin pape
Traffic awareness investigation by questionary survey -Misuzu a hill housing complex as a case study-
Get PDFapplication/pdfPeople have to drive their own cars in the suburban area of a regional hub city，because the service level of the public transportation is lower than that of the central area of the city. However all people can not drive their private cars freely there. And the traffic service for private cars，is not satisfactory in transportation to children，students，senior citizens，handicapped persons and people who do not have their private cars or driver's license. The aim of this paper is to evaluate the service level of public transportation in Itsukaichi district of Hiroshima City，which is commuter town. We evaluated the service level of public transportation in Itsukaichi district the sight and quantitatively by using Arc View GIS and the model of an existing research，by the over all index that contains fare，time，frequency，transfer resistance and punctuality，in consideration of the performance of total as “Movement” including not only traffic performance but also on foot.departmental bulletin pape
人との協調にもとづく昆虫の行動制御法（第二報）-昆虫の脳内機構モデルに基づく行動発現モデル-
Get PDFapplication/pdf昆虫は優れた感覚器官と運動機能を持っている。本研究は人からの制御意図を昆虫に伝え、それによる、人との協調関係により昆虫の能力を有効利用する方法を考察した。本研究は脳神経に電気信号を与えて強制的に生物を制御、あるいは機能部分だけを取り出して利用する一方的な方法でなく、生物の行動も認めながら人の行動意図と融合した、協調による行動の実現を目指している。 本報告では、実験結果と脳内機構モデルに基づき、脳内のCPG間をFuzzy関係で記述することで、刺激に対する行動発現のモデル構築を試みた。conference pape
The Relationship between Earthquake-Bearing Wall Area lndex，Micro-Tremor Property and Earthquake Damage of Conventional Wooden-Framed Houses
Get PDFapplication/pdfAt Kure City and Kumano-cho，Aki-gun in Hiroshima Prefecture，the seismic intensity rose to the highest level，6 or less，in the 2001 Geiyo earthquake. This research aims to investigate the relationship of wall area index of conventional wooden-framed houses for earthquake-proof and micro-tremor property to the roof-tile damage. The micro-tremor property measurements are commonly taken to survey the earthquake damage of the wooden houses and the site ground condition. However，their close relations to earthquake damage，wall area index，the micro-tremor property are not so clear. The observed results shows that as the construction year of the house is newer，the natural frequencies becomes higher and the tile-roof damage due to the Geiyo earthquake is smaller. Concerning the relatively old houses，natural frequencies decrease as wall area index decreases，especially in the short-span direction of the house.departmental bulletin pape
A study on the distribution access to the tram stop.
Get PDFapplication/pdfThe tram is operated to Hiroshima City. In addition, there is a plan to introduce public traffic into another and Hiroshima City. The tram is newly established, and a traffic kind that becomes an object is an existing improvement of the tram, and new establishment of the subway and the new traffic system. The evaluation element that had been valued when newly public transportation was maintained is thought to be a cost transportation power speed of the cost of construction management expense. In that case, the thing with excellent ability of public transportation that becomes an object might not necessarily become a thing that convenience is high for the user. The purpose of this research evaluates the public traffic seen from user’s aspect. Not only the performance of public traffic but also it shows and the performance is verified about the total as “Movement” including on foot. As for the result, if transportation to the center of a city where Hiroshima City will not be crossed in a short time and a lot of employment exists is assumed to be the first purpose, the condition of a current stop is thought to be effective in the project plan that increases the rating speed of the train as it is.departmental bulletin pape
プラスティック光ファイバー周波数特性測定における検出器の影響
Get PDFapplication/pdfプラスティック光ファイバー（POF）の周波数特性測定においてPOF出射光を検出するアバランシェフォトダイオード（APD）の使用法が特性に及ぼす影響について検討したので報告する。周波数特性はAPDがPOF出射光をすべて受光してはじめて正確に測定できるのであるが、使用したPOFと現在入手可能なAPDの組合せでは全量受光の条件が満たされないことが予測された。conference pape
電源制限を考慮した過渡安定度付き最適潮流計算法によるTTC計算
Get PDFapplication/pdf近年の電力事業における規制緩和・自由化によりTTC(Total Transfer Capability)を常に把握しておく必要がある。そこで我々は慣性中心に対する位相角の大きさを制約条件に加えることにより過渡安定度を考慮した最適潮流計算法(TSCOPF)を用いてTTC計算を行ってきた。本研究では、系統故障時に一部の発電機を高速遮断する電源制限を考慮した場合のTTCを求め、発電機の位相安定度制約のラグランジュ乗数とTTC増加量の関係を確認する。conference pape
Some Problems Encountered in the Measurement of Impulse Response Waveform and Frequency Transfer Function of Plastic Optical Fiber
Get PDFapplication/pdfVarious attempts to measure precisely impulse response waveforms and frequency transfer functions of a plastic optical fiber (POF) of 1mm in diameter and 0.5 in N.A. are reported in this paper. The waveforms showed a remarkable difference when the POF end surface was placed at the glass window position of the hermetic container of the photodiode (PD) on one hand, and in contact with the semiconductor surface after breaking the glass on the other. An optical oscilloscope (OOS) was tested. Output waveforms measured with the OOS showed insignificant differences from those measured with the PD with the POF end surface placed at the glass window position. The waveforms measured with the PD changed their profiles as the POF length was varied: The peak of the pulse moved from the pulse rear to the front with increasing length. Waveforms theoretically calculated by using measured far-field patterns (FFPs) and non-scattering approximation could clearly explain the features of the measured waveforms. Measurements of frequency transfer functions were carried out by using a newly designed 1:1 relay lens placed in front of the PD. The measured transfer function was characterized by well-known large attenuation at the frequency equal to the reciprocal of the waveform width. The frequency transfer function measured with and without the relay lens especially showed a difference at the frequency mentioned above.departmental bulletin pape