著者
安藤 繁
雑誌
情報処理学会論文誌 (ISSN:18827764)
巻号頁・発行日
vol.23, no.1, pp.72-80, 1982-01-15

画像強調の目的は不要な情報を除き画像の本来の性質を明瞭にさせることと考えられる.確率分布の鮮鋭化(sharpening)を通してこの目的を実現する確率密度関数勾配法と呼ぶ新しい画像強調法を提案することが本論文の目的である.二の方法は 1)画像の特徴を表す成分を定め 2)この特徴成分の確率密度関数を推定し 3)これに照らして確率密度が増加するような画像修正操作をすべての特徴成分に対して行う 4)以上の演算を反復して近似的な最大事後確率推定に収束させる というものである.本論文では最大事後確率推定との対応のもとに 方法の定式化と具体的算法の導出を行う.さらに二つの応用例を示して原理の検証と評価を行い 他の方法では得られない効果的な画像強調が行われることを確認する.
著者
大喜多 紀明
出版者
北海道言語研究会
雑誌
北海道言語文化研究 (ISSN:18826296)
巻号頁・発行日
vol.11, pp.99-112, 2013-03-30

本稿では、アイヌ民族であり、かつ、アイヌ語日本語二重話者である知里幸惠の筆記資料に確認される交差対句を紹介している。これらの日本語文章に表出された交差対句は、アイヌの民俗的な修辞表現法による影響である。したがって、知里の日本語筆記資料は、アイヌの民俗性によって文章構造が修辞論的に変異した日本語の実例であると判断できる。
著者
東 浩紀
出版者
国立研究開発法人 科学技術振興機構
雑誌
情報管理 (ISSN:00217298)
巻号頁・発行日
vol.59, no.9, pp.624-628, 2016

<p>インターネットの利便性をこれまでになく享受し,ネット上に拡散する情報の力が革新的な発想を後押しすることも多い21世紀初頭は,同時に情報漏えいや権利侵害,依存といった弊害や危うさを露呈し始めた時代でもある。不可視だが確実に存在する脅威,ネットにつながっているゆえの不自由さをも見極める必要がある。現代の環境を冷静に認識し,今起きていることに対してどうふるまうべきか。現代思想・法曹・警察行政・迎撃技術・情報工学・サイバーインテリジェンス等のスペシャリストが,6回に分けて考える。</p><p>第1回は,サイバースペース(情報空間)やインターネットが浮き彫りにした「人間の本質」と「未来」について,哲学者・東浩紀氏が語る。</p>
著者
伊藤 直輝 中村 弘毅 山崎 徹
出版者
一般社団法人日本機械学会
雑誌
機械力学・計測制御講演論文集 (ISSN:13480235)
巻号頁・発行日
vol.2015, pp."528-1"-"528-10", 2015-08-25

An electric guitar is composed of a wooden body, a wooden neck, 6 steal strings and other electric parts including an electromagnetic pickup. An electric guitar convert string vibration into electric signal through a pickup, and the sound is emitted with an amplifier, or a speaker. Usually, high density and high stiffness wood is used for body material to sustain string vibration longer and the sound remains. Also, it is reported that the material of a body influences the quality of the sound. Nonetheless, there are few studies focused on detail of vibration propagation between string vibration and sound. Authors have studied on the structure of traditional instruments to clarify the vibration characteristics especially from the aspect of vibration energy propagation model in recent years. Specifically, the vibration propagation characteristics of several instruments have been evaluated using SEA: the bridge structure and the sound post of violin, and soundboard of a piano. It is expected that SEA may also help understanding sound emitting process of a guitar. In this study, vibration energy propagation of two test guitars composed of different body material are observed with experimental SEA, to evaluate the influence of body material on the guitar sound. As a result, it has represented the difference between the guitar in the vibration propagation characteristics between the neck and body. The guitar which the Young's modulus of body materials has a big has a big sound pressure level. There is a strong correlation in the frequency characteristic of input power and sound pressure level.

1 0 0 0 OA 五燈會元20卷

著者
宋釋普濟撰
出版者
中村宗遵活字印
巻号頁・発行日
vol.[15], 1635
著者
Ryohei Nakano Hidemi Akimoto Fumio Fukuda Takashi Kawai Koichiro Ushijima Yosuke Fukamatsu Yasutaka Kubo Yuichiro Fujii Ken Hirano Kunihisa Morinaga Naoki Sakurai
出版者
一般社団法人 園芸学会
雑誌
The Horticulture Journal (ISSN:21890102)
巻号頁・発行日
pp.OKD-094, (Released:2017-10-12)
被引用文献数
15

Split-pit in peach fruit is a problematic disorder. Split-pit fruit cannot be detected based on external appearance, and contamination of fruit by split-pit reduces its reliability in the marketplace. Here, we demonstrate that split-pit fruit can be identified by a nondestructive acoustic vibration method and a unique approach based on the ratio of the third (f3) to the second (f2) resonant frequency. The response-resonant frequency spectra showed that the peaks of f2 frequencies in split-pit fruit were shifted to much lower values than those in normal fruit, whereas those of f3 frequencies showed only small shifts. The calculated f3/f2 ratios in most normal fruit were in the range of 1.35–1.4, whereas those in split-pit fruit were 1.45–2.0. Analysis of more than 300 fruit samples revealed that by setting the f3/f2 cut-off value at >1.45, 95% of split-pit fruit in the fruit samples were detected, whereas only 1.5% of normal fruit were missorted as split-pit fruit. A model for simulating the vibration properties of peach fruit was developed by using the finite element method. The simulated vibration patterns showed that f3/f2 values were increased by the insertion of split pit, indicating that, at least partially, the observed high f3/f2 values in split-pit fruit directly reflected split-pit occurrence. These results clearly demonstrate that the use of f3/f2 ratios obtained using an acoustic vibration method can effectively detect fruit with split-pit. The possibility of installing acoustic vibration devices in peach sorting lines and the application of portable devices to unpicked fruit on the tree are discussed.
著者
Hiroki Ueno Takeshi Maeda Naoki Katsuyama Yu Katou Satoshi Matsuo Kanako Yano Akira Ando Kaori Nagasuga Mizuki Yamada Shunsuke Imanishi
出版者
一般社団法人 園芸学会
雑誌
The Horticulture Journal (ISSN:21890102)
巻号頁・発行日
pp.OKD-101, (Released:2017-10-11)
被引用文献数
11

Several Japanese tomato cultivars develop a physiological disorder called leaf marginal necrosis, which occurs in relatively young compound leaves. Although the positions of the observed symptoms differ from those caused by inadequate potassium (K+) supplementation, previous studies have reported a relationship between the reduction of K+ content and the occurrence of this disorder. However, the mechanism of the relationship between K+ deficiency and leaf marginal necrosis remains unstudied. In the present study, the relationship between K+ deficiency in leaflets and leaf marginal necrosis was investigated by cation measurement and gene expression analysis to understand the possible mechanism responsible for the induction of leaf marginal necrosis. First, cation measurement of the two cultivars differing in their symptom intensities showed a trend of K+ reduction in the ‘CF Momotaro J’ cultivar developing leaf marginal necrosis at the tip leaflets positioned under the flowering fruit truss. Next, a comparison between the basal and tip region of the leaflet from four cultivars differing in their symptom intensities revealed that the K+ concentration in tip leaflets was significantly lower in the tip regions compared to the basal region, especially in the two cultivars ‘CF Momotaro J’ and ‘Momotaro grande’, leading to leaf marginal necrosis. The gene expression analysis of the basal and tip regions identified that the expression patterns of jasmonate-related genes were upregulated in the tomato leaflets with low K+ concentration. The gene expression of a leaf senescence marker gene, a homologue of the SAG12 gene of Arabidopsis thaliana, was detected only in the leaf tip region samples with the lowest K+ concentration. Furthermore, ‘CF Momotaro J’ plants cultivated with K+-supplemented medium showed an increase in the K+ concentration, a decrease in the occurrence of leaf marginal necrosis, and down-regulation of the expression of jasmonate-related genes in tip leaflets. These results indicate that tomato leaf marginal necrosis occurs because of K+ starvation in the tip region of leaflets, leading to the activation of jasmonate-induced signal for necrosis.

1 0 0 0 OA 松屋外集

著者
小山田与清
出版者
巻号頁・発行日
vol.初編6巻,