著者
吉澤 大樹 橋本 周司
出版者
一般社団法人 人工知能学会
雑誌
人工知能学会論文誌 (ISSN:13460714)
巻号頁・発行日
vol.16, no.3, pp.309-315, 2001 (Released:2002-02-28)
参考文献数
12
被引用文献数
1 3

This paper shows statistical analyses of the search-space landscape of travelling salesman problems in due consideration of stochastic optimization. It is known from existing works that travelling salesman problems have landscape called “a rugged landscape” and “big valley structure”. This work reveals more detailed structure of the landscape. We deal with the 1000 travelling salesman problems of 6 to 9 cities where the cities are arranged randomly and a travelling salesman problem of 100 cities. It is assumed that the rugged landscape is a combination of the global valleylike structure and the local noiselike structure. Each of them is characterized by the statistical properties of the search-space landscape, that is, the global valleylike structure has linearity with the distance (in this case, the bond distance) from the optimum, and the variance of the local noiselike structure increase monotonously with the distance from the optimum. On the other side correlation of the tours with the costs close upon the optimum cost is low. For this reason to combine the genetic search with the local search is supported. Even if the number of cities and the definition of the intercity cost value are changed, the structure of the landscape has the same feature. Although the number of the cities of the examined travelling salesman problems is not large, obtained results seem to be universal. It is forecasted that not only travelling salesman problems but also many practical problems have the structure which is characterized with the same measure. These results are useful to compose more effective optimization methods without trial and error.
著者
多湖 輝興 河瀬 元明 政木 義則 橋本 健治
出版者
公益社団法人 化学工学会
雑誌
化学工学論文集 (ISSN:0386216X)
巻号頁・発行日
vol.24, no.1, pp.81-85, 1998-01-10 (Released:2009-11-12)
参考文献数
11
被引用文献数
4 6

本研究では, アルミニウムトリイソプロポキシド (ATI) を原料に用い, アルミナ薄膜を製造し, 反応速度解析を行った. CVD 反応には, 主に2つの反応経路がある.一つは, 原料が気相中で熱分解し, 生成した中間体が膜表面に拡散により移動し成膜する経路である.もう一つは, 原料が膜表面に拡散により移動し, 膜表面上に吸着した原料が熱分解し成膜する経路である. ATI からのアルミナ成膜反応について, どちらの反応経路が支配的であるかを調べるため, 管径の異なる細管型熱 CVD 反応器を用い, 反応器の体積と基板の表面積との比 V/S を変えて実験を行った.その結果, ATI からのアルミナ薄膜生成反応は, 原料である ATI 濃度に比例する1次反応であり, 気相での熱分解が主要な反応経路であることがわかり, また薄膜生成反応速度定数を定式化することができ, 活性化エネルギーは 179kJ/mol と求まった.
著者
髙橋 新吾 中村 哲夫 有馬 祐杜 橋本 秀紀 中村 壮亮
出版者
一般社団法人 日本機械学会
雑誌
日本機械学会論文集 (ISSN:21879761)
巻号頁・発行日
vol.83, no.853, pp.17-00035-17-00035, 2017 (Released:2017-09-25)
参考文献数
9

This paper proposes an electrocardiogram (ECG) measuring system which simultaneously enables the reduction of input impedance and low-frequency cutoff through virtual amplification of the coupling capacitance formed by body capacitance and ECG electrode. This virtual amplification of the coupling capacitance is realized by the additional circuit which controls the inflow of external current to create the situation as if the time constant of the capacitance has increased. Moreover, not only this additional function but the amplification circuits commonly used in ECG measuring system has also been perfectly tuned-up. Here, instead of using the MOS-FET which shows bad noise characteristics, the combinations of J-FET differential amplifier and current feedback circuit have been used for stable amplification. In addition, coupling capacitors of the system are removed due to the DC-Coupling enabled by using single operational amplifiers instead of instrumentation operational amplifiers.
著者
川添 裕三 橋本 英樹 森上 修 村瀬 英一 古川 純一
出版者
一般社団法人 日本機械学会
雑誌
日本機械学会論文集 (ISSN:21879761)
巻号頁・発行日
vol.83, no.853, pp.17-00159-17-00159, 2017 (Released:2017-09-25)
参考文献数
8
被引用文献数
1

To explore the behavior of near-extinction flamelets in turbulent premixed flames, emission intensities of OH, CH and C2 radicals of hydrocarbon-air premixed flames have been examined using the newly developed emission spectroscopy system. It has been shown in our previous study that the emission intensity ratio of 515.5 nm/470.5 nm bands of C2 radical uniquely depends on the temperature of unstrained methane/air and propane/air flames. In the present study, to establish the technique that estimates the temperature of the near-extinction flamelet of turbulent premixed flames, the relation between the temperature and the emission intensity ratio of 515.5 nm/470.5 nm bands of C2 radical of strained flames has been sought by using a counter-flow burner. The unique relation between the flame temperature and the emission intensity ratio of 515.5 nm/470.5 nm bands of C2 radical has been found to exist for the Propane-air and the Butane-air strained flames. Therefore, it can be concluded that the temperature of flamelets of the Propane-air and the Butane-air turbulent premixed flames can be estimated by using the relation between the temperature of the strained flame and the emission intensity ratio of 515.5 nm/470.5 nm bands of C2 radical obtained in the present study.
著者
中村 岳史 野尻 幸宏 大槻 晃 橋本 伸哉
出版者
日本地球化学会
雑誌
地球化学 (ISSN:03864073)
巻号頁・発行日
vol.28, no.1, pp.47-57, 1994-03-24 (Released:2016-12-13)
被引用文献数
3

Seasonal changes in the methane concentration of seawater were measured in highly eutrophic, Tokyo Bay. Methane concentrations varied from 27.8 to 1850nM during May 1991 to December 1992 and were always supersaturated with the atmospheric methane. During the spring and summer seasons, when bottom water became anoxic, dissolved methane was observed to accumulate (maximum 929nM). There were inverse correlations between dissolved oxygen and dissolved methane in bottom water, when dissolved oxygen concentrations in the bottom water fluctuated. Throughout the experimental period, fluctuations of methane concentrations at mid-depth were relatively small. Particularly during summer, methane concentrations in surface water frequently increased to the same levels, or became higher than concentrations in bottom water. The source of methane in these surface waters were attributed to lateral transport from the near shore zone. From fall throughout winter, methane concentrations decreased and resulted in uniform distribution through the water column. Methane oxidation activities measured in June and August, 1991 in surface and bottom water were extremely low. The calculated diffusive flux from the bay surface to the atmosphere were 1.5-11mgCH4/m2/d.
著者
橋本 雄太
雑誌
じんもんこん2016論文集
巻号頁・発行日
vol.2016, pp.153-158, 2016-12-02

近年,機械処理の適用が困難な大量のデータに対して,不特定多数のボランティアの協力をインターネット上で募り,分類やタギング等のタスクを実施するクラウドソーシングの手法が人文学分野でも一般的になりつつある.一方で,日本語の歴史資料の翻刻に同手法を適用するためには,①現代人には解読困難なくずし字と,②多数のボランティアを長期的に従事させる適切な動機付けの設計の2点が課題となる.本研究では,人文学コンテンツの学習サービスと,クラウドソーシングシステムを統合することによって,ボランティアの学習意欲を動機づけに利用するとともに,タスク実施スキルの向上を図る手法を提案する.また実際に,くずし字の学習サービスと前近代災害資料の翻刻システムを統合したWebシステムを構築し,その有用性を評価する.
著者
島 裕也 中村 龍哉 松井 裕樹 山田 義博 宮内 啓成 橋本 聡司 阿部 一雄
出版者
Japan Society of Powder and Powder Metallurgy
雑誌
粉体および粉末冶金 (ISSN:05328799)
巻号頁・発行日
vol.57, no.11, pp.729-733, 2010-11-15
参考文献数
13
被引用文献数
1

LiFePO<SUB>4</SUB>/C composite particles were prepared by gas-solid phase reaction. The reaction temperature had a detrimental effect on the purity of the composite particles. The suitable temperature was around 650°C, above and below which ferromagnetic impurities were found. The retention time influenced only the carbon deposition amount, but the excess amount of carbon caused the degradation of the electrochemical performance. The specimen prepared at the optimum conditions exhibited superior performances in both rate capability and cycle stability as well as less impedance growth during the cycling.
著者
大森 正子 橋本 令子 加藤 雪枝
出版者
日本色彩学会
雑誌
日本色彩学会誌 (ISSN:03899357)
巻号頁・発行日
vol.26, no.2, pp.50-63, 2002
参考文献数
27
被引用文献数
14

本研究では、色彩刺激が、心理と生理に及ぼす効果について明らかにすることを目的とした。色相・明度・彩度と面積の違う合計60試料を作成し、光色刺激による、自律・中枢神経活動を評価するための指標として、心拍変動と脳波の測定行った。心理評価として、SD法による因子分析を行った。実験の結果、以下のような知見が得られた。・開眼状態であっても、α波含有量が後頭部位において顕著に喚起されていた。・小さい面積条件では、光色刺激のCuv^★が、高値になるほど、心理評価の「活動性因子」を高め、α波含有量を抑制することが示喚された。・大きい面積条件では、光色刺激のHuv°が、高値になると後頭部位において、α波含有量を喚起することが示喚された。・感情や情操に関わりのある、前頭部位において、純色、低彩度の光色刺激で、色相のG-P系で、α波成分に1/fゆらぎがみられた。副交感神経活動側に傾いていて、1/fゆらぎを示している光色刺激は、大きい面積条件では、純色赤(5R5/14)・青紫(5PB4/12)、小さい面積条件では、純色黄赤(5YR7/14)・高明度青(5B8/5)であった。生体が安静状態であり、快適に感じているということが、示喚される。・交感神経活動側に傾いていて、1/fゆらぎを示している光色刺激は、生体がよい意味で興奮状態であり、快適に感じているということが示喚された。
著者
橋本 翔 小俣 弘樹 松永 久生
出版者
一般社団法人 日本機械学会
雑誌
日本機械学会論文集 (ISSN:21879761)
巻号頁・発行日
vol.83, no.852, pp.16-00584-16-00584, 2017 (Released:2017-08-25)
参考文献数
19

It has been shown that rolling contact fatigue (RCF) test using specimen having a small drilled hole is a useful method for evaluating the effect of small defect on flaking strength of steels. In this study, RCF tests of rolling bearings having a small drilled hole were carried out. The flaking failure was considered as a problem of shear-mode fatigue crack emanating from the small defect. As a first step to quantify the crack-growth threshold on the basis of fracture mechanics, mode II stress intensity factor range, ΔKII, of a ring-shaped crack emanated around the edge of a drilled hole under the passing of a rolling element was analyzed by using finite element method. And then, the obtained values were correlated with the ΔKII values of penny-shaped cracks in an infinite body under uniform shear through the intermediary of a correlation factor, fdrill. The stress intensity factor of the ring-shaped crack was uniformly correlated with that of the penny-shaped crack by the single factor fdrill irrespective of hole diameter, d, depth of hole edge, h’, and maximum contact pressure, qmax, within the ranges: d = 0.05 ~ 0.2 mm, h’ = 0.05 ~ 0.345 mm and qmax = 2.0 ~ 3.0 GPa. The obtained results will be applied for the quantification of RCF test results shown in the subsequent paper.
著者
桃田 茉子 浅野 良輔 永谷 文代 宮川 広実 中西 真理子 安田 由華 柴田 真理子 橋本 亮太 毛利 育子 谷池 雅子
出版者
公益社団法人 日本心理学会
雑誌
心理学研究 (ISSN:00215236)
巻号頁・発行日
pp.88.16215, (Released:2017-09-30)
参考文献数
39
被引用文献数
3

This study sought to examine the reliability and validity of the Japanese version of the Behavior Rating Inventory of Executive Function (J-BRIEF). In this study, BRIEF was administered to evaluate executive function in everyday life in 91 subjects with autism spectrum disorder (ASD; ages 12–15; 72 boys) and 2,230 community samples (CS; ages 12–15; 1,083 boys). For this purpose, we applied categorical confirmatory factor analysis, which revealed that the scale was composed of two factors and eight subscales of the high test-retest stability. Reliability was confirmed using an external criterion (ADHD-Rating scale: ADHD-RS). Receiver operating characteristic analysis revealed an optimal cut-off of 118.5 (sensitivity = 0.811, specificity = 0.828). This study confirmed the reliability and the validity of J-BRIEF.