1578 research outputs found
Sort by
Stability analysis of speed and current control for PMSM considered position sensorless control
Get PDFFor the control of permanent magnet synchronous motors, speed control, current control, sensorless control exist, and control gain design is required. In general, the control gain needs to be designed in consideration of stability and responsibility, and various researches have been conducted on this. In this paper, the influence of the control band of the three types of control on the stability is analyzed by combining the analysis of the pole placement of the closed-loop transfer function and stability judgment considering the axial error which is the difference between the actual position and the estimated position, the relationship between each control band that can secure the results is discussed.departmental bulletin pape
Phylogenetic Analysis of Mountain Leech Based on Mitochondrial DNA Sequences
Get PDFThe land leech, Haemadipsa, is a terrestrial bloodsucking leech. Haemadipsa leeches are segmented worms belonging to the phylum, Annelida. In Japan, Haemadipsa leeches are found in the forest region between Akita and Okinawa, which is known to be very humid. Haemadipsa leeches are also found in the tropical and subtropical regions of Taiwan, Vietnam, Thailand, and Malaysia. Deer, monkey, and birds serve as host animals for Haemadipsa leeches. These leeches inhabit a wide range of regions owing to the movement of the host animals and due to global warming. Despite the high global abundance of land leeches, their diversity and expansion routes are poorly understood. The distinct morphological differences in Haemadipsa leeches have not been discovered. In this study, mitochondrial DNA (mtDNA) sequences were analyzed to determine the species identity and to evaluate the genetic relationship among Haemadipsa leeches. First the complete mtDNA sequences of several Japanese land leeches were determined. The results revealed 70% sequence similarity—at the amino acid level—with the reference sequences of Megascolecidae and Hirudo nipponia. The tRNA or rRNA sequences of Haemadipsa leeches are unique compared to those of other leeches belonging to the phylum, Annelida. Next, the mitochondrial cytochrome c oxidase subunit 1 (COX1) gene from 10 Haemadipsa leeches in Japan was analyzed and compared with that of land leeches from around the world. Phylogenic analyses for COX1 gene were performed using the neighborjoining method. These results suggest that Haemadipsa leeches have evolved independently and by different mechanisms compared to other leeches.departmental bulletin pape
Monopoly Price Experimentation
Get PDF本稿では，新製品がどの程度消費者に受け入れられるかの適合度（マッチ）について企業も消費者も不確実な状況において，独占企業が動学的に価格を設定することによって学習していく過程について考察する。企業は第1期における消費者全体の反応を見て，新製品と消費者の選好との適合の度合いを予測する。第1期の消費量が多いほど予測の精度は向上するとする。この設定のもとで，独占企業は需要に関する情報を収集するために，情報収集がない場合と比べて第1期により低い価格を設定する。価格の平均値は期間とともに上昇する。特に新製品が既存の製品と補完財の関係にある場合，及び情報収集の精度が高い場合は価格引下げが大きい。他方，新製品の適合度に関する初期信念が低いほど，独占企業は第1期の価格を大きく値引きしそうなものだが，予想に反して初期信念が中程度の場合に値引き率が大きいという結果を得た。departmental bulletin pape
Fixing the “Original” in the Dead Men's House : Thinking Security in The House of the Seven Gables through Daguerreotype
Get PDFdepartmental bulletin pape
Inter-organizational Cooperation and Controls within the Public Sector : Future Directions for Control Research on Extended Networks
Get PDF少子高齢化のため多様化する公的サービスへのニーズに対応するには，政府，自治体，NPO/NGO，民間組織などの連携が重要である。公的部門のマネジメント・コントロール研究では，組織間連携を対象とするコントロール（組織間コントロール）が議論されている。しかし，これまで論者によって様々な視点で議論されており，当該領域全体での現状と課題は明らかでない。本稿では，公的部門の組織間コントロールについて文献調査を行う。そのうえで，近年注目されている公的サービスの提供者と利用者による拡張的ネットワークについて，ネットワークのガバナンスにかんする議論を手がかりにマネジメント・コントロール研究で取り組む課題を明らかにする。departmental bulletin pape