- 著者
- 佐藤 和久
- 出版者
- 農山漁村文化協会
- 雑誌
- 現代農業 (ISSN:02893517)
- 巻号頁・発行日
- vol.84, no.9, pp.240-243, 2005-09
2 0 0 0 確定論と確率論に基づく地方供給系統構成の多目的評価
- 著者
- 林 泰弘 松木 純也 佐藤 和久 得能 裕子
- 出版者
- The Institute of Electrical Engineers of Japan
- 雑誌
- 電気学会論文誌. B, 電力・エネルギー部門誌 = The transactions of the Institute of Electrical Engineers of Japan. B, A publication of Power and Energy Society (ISSN:03854213)
- 巻号頁・発行日
- vol.123, no.10, pp.1172-1179, 2003-10-01
- 被引用文献数
- 1
Local power systems (66kV) are served from the 275kV or 154kV substations. In order to maintain power supply reliability, the transmission lines are connected to several substations, and the operational configuration is radial. Since practical local power system has a number of transmission lines, many configuration candidates occur. It is expected to effectively evaluate these configuration candidates from various viewpoints such as reliability of power supply, transmission loss and so on. In this paper, the authors propose a multi objective evaluation method by using deterministic and probabilistic approaches for local power system configuration. In the proposed multi objective evaluation method, after selecting system configuration candidates which satisfy N-1 security by using an optimization method based on Boolean function, these candidates are evaluated from viewpoints of expected outage time, transmission loss and facility operation rate. In order to check the validity of the proposed method, numerical results are shown for a practical local system model with about 39 × 10<SUP>27</SUP> configuration
1 0 0 0 OA クリスタリット
1 0 0 0 OA 骨の力学機能に立脚した脊椎固定用異方性材料デザイン
- 著者
- 新家 光雄 仲井 正昭 劉 恢弘 稗田 純子 趙 研 東 健司 上杉 徳照 石本 卓也 今野 豊彦 佐藤 和久 赤堀 俊和
- 出版者
- 名城大学
- 雑誌
- 基盤研究(A)
- 巻号頁・発行日
- 2012-04-01
β型低弾性率Ti-29Nb-13Ta-4.6Zr合金(TNTZ)およびTi-Cr系合金につき、特にユビキタス元素である酸素(O)に注目し、従来では脆化をもたらすと考えられてきた高O濃度としたり、CrおよびO量を制御することにより、ω相、α”マルテンサイトあるいは双晶を適切に誘起すること、さらには超塑性歪加工、微粒子衝突やキャビテーションピーニングを施すことにより、両合金の高強度・高延性化、高疲労強度化、自己ヤング率調整機能の付与を達成した。TNTZでは、単結晶を用いて変形挙動を解析し、同合金単結晶が塑性的には異方性を示す、弾性的には等方性を示すことを見出した。
- 著者
- 伊東 淳一 佐藤 以久也 大口 英樹 佐藤 和久 小高 章弘 江口 直也
- 出版者
- The Institute of Electrical Engineers of Japan
- 雑誌
- 電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society (ISSN:09136339)
- 巻号頁・発行日
- vol.124, no.5, pp.457-463, 2004-05-01
- 被引用文献数
- 62 73
This paper proposes a novel control method based on the virtual AC/DC/AC conversion for the matrix converter. The virtual AC/DC/AC conversion method is a very simple strategy to control the input current and the output voltage for the matrix converter. There are two new topics proposed in this paper. Firstly, this paper proposes the minimum switching loss modulation on the virtual rectifier. In case of the proposed modulation, only two arms switching in the virtual rectifier using dc link current control by the virtual inverter can obtain clean sinusoidal input current. Secondly, a novel lean controlled carrier modulation on the virtual inverter is proposed. The leans of the triangle carrier are controlled by the duty ratio of the rectifier side pulse. The lean controlled carrier reduces harmonic distortion of the input current by avoiding interference between the rectifier control and the inverter control. These new proposals are confirmed by simulation and experimental results.