著者

堀田 創 野澤 貴 萩原 将文

出版者

一般社団法人情報処理学会

雑誌

情報処理学会論文誌 (ISSN:18827764)

巻号頁・発行日

vol.48, no.3, pp.1491-1501, 2007-03-15

被引用文献数

2

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本論文では感性ルールベースを用いた日本語フォント自動作成システムを提案する.提案手法は様々なデザインのフォントを自動生成することを目的としている.フォントは,各文字の骨格情報に,太さなどのパラメータによる肉付けが行われることで生成される仕組みとなっている.また,ユーザの入力には感性語を用いる.感性語とフォントデザインの対応は,各フォントに対する印象がファジィルールとして保存されている.これらはアンケートによって得られた感性情報を解析することで構築される.感性の反映には,遺伝的アルゴリズムを用いている.これにより,フォントは世代が進むにつれてユーザの入力した感性語に合った形状となり,ユーザは要求したイメージに近いフォントを手軽に作成することが可能となっている.本システムは従来のシステムを大幅に改良したものである.まず使用可能な漢字の文字数が72 文字から6 355 文字へ拡張されている.また感性の反映に感性ルールベースが適用され,ユーザの入力に対してより適切なフォントが出力されるようになった.ユーザインタフェースは従来のようなスタンドアローンアプリケーションからWEB アプリケーションへと移行され,通常のブラウザから使用可能となっている.被験者による評価実験により,提案システムと従来システムとの,出力されたフォントに対する感性反映度および多様性の比較を行った.その結果,提案システムの有効性が確認されている.In this paper, we propose a Japanese font designing system using fuzzy-logic-based Kansei rule base. With this system, a user can easily create favorite fonts by inputting some words. A main idea of the proposed font design method is the addition of various effects to basic font skeleton data. In order to determine the design effects, the proposed system employs fuzzylogic- based Kansei database and it derives the desired design effects from the input impression words. The following three points is the improvement from the conventional system. First, the number of Kanji characters is increased from 72 to 6,355. Second, a Kansei database is prepared using the automatic rule creating method for Kansei data. Third, a user interface is improved. According to the experimental results, we confirmed that the new system excels the conventional one in respect of reflection of desired impression and the variety of the created fonts.

著者

堀田 創 野澤 貴 萩原 将文

雑誌

情報処理学会論文誌 (ISSN:18827764)

巻号頁・発行日

vol.48, no.3, pp.1491-1501, 2007-03-15

---

本論文では感性ルールベースを用いた日本語フォント自動作成システムを提案する.提案手法は様々なデザインのフォントを自動生成することを目的としている.フォントは,各文字の骨格情報に,太さなどのパラメータによる肉付けが行われることで生成される仕組みとなっている.また,ユーザの入力には感性語を用いる.感性語とフォントデザインの対応は,各フォントに対する印象がファジィルールとして保存されている.これらはアンケートによって得られた感性情報を解析することで構築される.感性の反映には,遺伝的アルゴリズムを用いている.これにより,フォントは世代が進むにつれてユーザの入力した感性語に合った形状となり,ユーザは要求したイメージに近いフォントを手軽に作成することが可能となっている.本システムは従来のシステムを大幅に改良したものである.まず使用可能な漢字の文字数が72 文字から6 355 文字へ拡張されている.また感性の反映に感性ルールベースが適用され,ユーザの入力に対してより適切なフォントが出力されるようになった.ユーザインタフェースは従来のようなスタンドアローンアプリケーションからWEB アプリケーションへと移行され,通常のブラウザから使用可能となっている.被験者による評価実験により,提案システムと従来システムとの,出力されたフォントに対する感性反映度および多様性の比較を行った.その結果,提案システムの有効性が確認されている.

著者

武村 雅之 池浦 友則 野澤 貴

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.52, no.4, pp.425-444, 2000-03-25 (Released:2010-03-11)

参考文献数

55

被引用文献数

1

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Magnitudes for the 1923 Kanto earthquake and its major aftershocks were determined in JMA (Japan Meteorological Agency) scale. The original definition of the JMA magnitude is a magnitude that is calculated by the Tsuboi's formula from the maximum amplitudes in horizontal components of seismograms obtained by the regional observation network of JMA. The used seismograms were recorded by standard seismographs, which were the displacement type with the natural period of about 5s and damping ratio of about 8. However, the seismometers had not been yet standardized before 1925 and various types had been used whose instrumental responses were quite different from those of the standard seismographs. The purpose of the present study was that the JMA magnitudes of the 1923 Kanto earthquake and its major 3 aftershocks were determined in consideration of the difference of the instrumental responses. Fortunately, unsaturated seismograms by the Imamura's type strong motion seismographs (displacement type) have been preserved at 7 stations of JMA. The natural period and damping ratio of each seismograph have been evaluated from the free oscillation records preserved at each station. The records for the main shock and aftershocks were digitized and corrected in the instrumental responses to calculate the seismograms with the instrumental response of the standard seismograph of JMA. After that, the maximum amplitudes were measured on the corrected records and the magnitude was determined for each earthquake following the definition of the JMA magnitude. The determined JMA magnitude was 8.1±0.2 for the main shock. All the results were consistent within the difference of 0.2 with the customary results, which were determined from the uncorrected amplitude and seismic intensity data. The standard deviations were smaller than 0.2 for all the events, which shows higher reliability of the present results, comparing with the past ones.

著者

堀田 創 野澤 貴 萩原 将文

出版者

日本知能情報ファジィ学会

雑誌

知能と情報 : 日本知能情報ファジィ学会誌 : journal of Japan Society for Fuzzy Theory and Intelligent Informatics (ISSN:13477986)

巻号頁・発行日

vol.20, no.3, pp.347-356, 2008-06-15

被引用文献数

1 1

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本論文では,位置情報に基づく新しいインターネット広告システムを提案する.インターネット上の広告システムは,一般的に効果の高いと考えられるユーザに対して広告を配信するものが望ましい.本研究では,広告効果向上の方法の一つとして,位置情報を根拠とする方式を提案している.位置情報に基づくインターネット広告配信は,ターゲットとしたい地域から近い位置に居るユーザに広告を配信することで実現される.しかしながら広告の効果的な範囲は地域ごとの特性および広告の質によってそれぞれ異なり,それらを詳細に広告主が指定するのは極めて困難である.その結果,産業界における実現可能性が非常に低くなるという問題がある.提案システムは,ニューラルネットワークにより自動的に広告の効果的な範囲を推定し,それを配信アルゴリズムに組み込むことで広告主に負担をかけない広告配信を可能としている.このシステムは携帯電話用の広告配信として利用され,現在も実際に運用されている.検証実験の結果,広告の効果的な範囲の自動推定および,位置情報に基づく広告が有効であることが確認されている.

著者

大畑 充 庄司 博人 清水 万真 谷川 博康 加藤 太一朗 野澤 貴史

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.89, no.926, pp.23-00168, 2023 (Released:2023-10-25)

参考文献数

18

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This study aims to develop a numerical simulation-based method for predicting ductile crack growth resistance curve (R-curve) for pre-strained components for rational assessment of ductile crack growth controlling fracture for pre-strained structural component with any plastic constraint. Experiments on R-curve of 3-point bend specimen with a shallow crack for steel pre-strained by 6% over uniform elongation provides that the pre-strain does not significantly reduce ductile crack initiation and growth resistance, even though the pre-strain induces disappearance of uniform elongation and work hardening together with drastic reduction in elongation. Observations of damage evolution in terms of micro-void formation indicate that ductile crack growth behaviors in both virgin and pre-strained steels are based on a micro-void nucleation-controlled ductile fracture mechanism. These experimental results demonstrate that the ductile damage model that we have already proposed for predicting R-curve for virgin steel that exhibits micro-void nucleation-controlled ductile fracture behaviors can be applicable for these virgin and pre-strained steels used. Thus, based on the previously proposed ductile damage model, a simulation-based method to predict the R-curve of pre-strained specimens only from the properties of virgin steel is proposed taking material degradation (change in strength and damage properties) due to pre-strain into account. The applicability of the proposed method is verified by showing the predicted R-curve for pre-strained steel are in good agreement with experimental results.

著者

武村 雅之 野澤 貴 池浦 友則

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.52, no.2, pp.317-333, 1999-10-20 (Released:2010-03-11)

参考文献数

30

被引用文献数

2

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Nozawa et al. (1995) proposed a source model with two big subevents of the same seismic moment for the 1923 Kanto earthquake (M=7.9), through the simulation of the records by the Imamura-type strong motion seismograph (displacementmeter) at Gifu observatory. This model was named Model I in the present study. The first subevent of Model I is located under the Odawara city, having a fault plane with the strike of N290°E and the rake angle of 162°. This fault has much strike slip component, which is consistent with the focal mechanism solution by KANAMORI (1971). However, the direction of the strike is not compatible with the trench axis of the Sagami trough. The second subevent occurring 12s after the first subevent is located under the Miura Peninsula. The fault of the second subevent, having much dip slip component, well explains the geodetic data. Recently, the seismograms by the Imamura-type strong motion seismographs at Sendai (Mukaiyama) observatory and Yamagata observatory were examined and the instrumental responses of the seismographs were revealed. Crustal structure from source to stations was estimated in the present study so as to explain the observed Love and Rayleigh waves at Sendai (JMA) and Yamagata observatories from the recent events occurring near the focal region of the 1923 Kanto earthquake. However, Model I failed to explain the records of the 1923 Kanto earthquake at Sendai (Mukaiyama) and Yamagata observatories, using the obtained crustal structure. Then, we revised Model I to explain these records, in consideration of the newly determined focal mechanism solution by Lallemant et al.. (1996) and iso-depth contour of the upper boundary of the Philippine Sea plate by Ishida (1992). The first subevent of the revised model (Model R) has a fault plane with the strike of N321°E and the rake angle of 128°, and the twice of seismic moment of the second subevent. The direction of the fault strike of the first subevent is parallel to the trench axis of the Sagami trough, while the fault plane of the second subevent is the same as Model I. Model R succeeded in explaining not only the records at Sendai (Mukaiyama) and Yamagata observatories but also those at Gifu observatory in the period range from 2 to 20s. This shows the fault model, being in agreement with the geometry of subduction zone along the Sagami trough, is better to explain the seismic records observed in Japan.

著者

野澤 貴 武村 雅之 池浦 友則 山中 浩明

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.48, no.3, pp.331-340, 1995-11-25 (Released:2010-03-11)

参考文献数

30

被引用文献数

1

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Records observed at Gifu observatory by an Imamura's type strong motion seismograph are one of the most useful records in Japan to investigate a source process of the 1923 Kanto earthquake (M=7.9). It is because amplitudes of the records are not saturated in EW and UD components, instrumental response of the seismograph has been clarified, and many records due to recent events occurred near the focal region of the Kanto earthquake have been obtained by more accurate seismographs at the same site. In the present study, a source process of the 1923 Kanto earthquake is elucidated through a simulation of the records using the normal mode theory in the period range from 2 to 20s. First, a crustal structure from the source to the station is estimated so as to explain dispersive characteristics of Love waves observed at Gifu observatory for the recent events, and their records are simulated to confirm a validity of the estimated crustal structure. Secondly, the records from the Kanto earthquake are simulated using the obtained crustal structure to deduce the source process of this event. According to KANAMORI (1971), a macroscopic faulting is a reverse right-lateral fault on a plane dipping 34° towards N20°E, whose slip has much strike component. If two big subevents with the same focal mechanism obtained by KANAMORI (1971) and with a time interval of about 12s are assumed on the fault plane, the observed records can be well explained. The first subevent is located under the Odawara city and the second one under the Miura Peninsula. The focal depth of the second event is 15 to 35km being deeper than that of the first event, which is 5 to 25km in depth. The seismic moments and the rise time are assumed 2.5×1027 dyne-cm and 5s for both the events respectively. On the other hand, if the focal mechanism of the second event is dip slip type, the observed records can be also explained well, even though the focal depth of the second subevent is the same as that of the first one. This model is consistent with a slip distribution on the fault plane obtained from geodetic data.

著者

武村 雅之 野澤 貴

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.49, no.3, pp.375-387, 1996-11-23 (Released:2010-03-11)

参考文献数

13

被引用文献数

3

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Seismograms from the 1923 Kanto earthquake (M=7.9) and its aftershocks at the Yamagata observatory of JMA (The Japan Meteorological Agency) in Tohoku district, Japan, are examined. They were recorded by the Imamura-type strong motion seismograph. Horizontal-component records from the main shock and the 1924 Tanzawa earthquake (M=7.3), one of the largest aftershocks, are digitized and the instrumental characteristics of the seismographs are examined. Natural period To and damping ratio v of the instrument are evaluated to be 4.5s and 1.5 for both the NS and EW components from the free oscillation records and documents for the results of testing the instrumental response. The maximum displacement in EW component of 11.2cm is obtained for the main shock in the period range from 2 to 20s, after the instrument correction.On the other hand, uncertainties of the instrumental characteristics remain for the seismograms from the 1923 Kanto earthquake observed at the Mukaiyama observatory of the Tohoku Imperial University in Sendai, [TAKEMURA et al. (1995)]. The Sendai city is located about 40km east from the Yamagata city. The epicentral distance and azimuth of the Mukaiyama observatory is not so different from those of the Yamagata observatory for the 1923 Kanto earthquake. It is found that the displacement records at Sendai and Yamagata have mostly the same amplitude for the recent moderately large earthquakes with almost the same location of epicenter as the 1923 Kanto earthquake. All the records were observed by the strong motion displacement seismographs of To=6s and v=8 both at the Yamagata observatory and at the Sendai district meteorological observatory of JMA. This fact indicates that the displacement at the Mukaiyama observatory in Sendai ought to show almost the same amplitude as one at the Yamagata observatory during the 1923 Kanto earthquake. Then, we redetermined To of the instrument at Mukaiyama observatory so that the amplitude of the displacement after the instrument correction is the same as that at the Yamagata observatory. Redetermined To is 5s in EW component, being meaningfully longer than the results estimated by TAKEMURA et al. (1995).

著者

野澤 貴 武村 雅之

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.50, no.1, pp.11-20, 1997-05-28 (Released:2010-03-11)

参考文献数

12

被引用文献数

1

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Records observed at the Takada observatory by an Imamura's type strong motion seismograph are useful in Japan to investigate a source process of the 1923 Kanto earthquake (M=7.9). Ground motion in the vertical component is completely recorded to the end. Those in horizontal components are also recorded to the end, though the amplitudes of them are saturated in the midst of the records. The instrumental response of the seismograph has been already clarified by TAKEMURA and NOZAWA (1996), and many records from the recent earthquakes occurring near the focal region of the Kanto earthquake are also obtained at the same site with modern instruments. First, a crustal structure model from the source to the station is established so as to explain the dispersion characteristics of Love-waves observed for the recent earthquakes, and their records are simulated by the normal mode theory using the obtained structure to confirm its validity. Secondly, the records from the Kanto earthquake are reproduced using the same structure model. NOZAWA et al. (1995) proposed the two possible source models for the Kanto earthquake through the simulation of the records at the Gifu observatory. Two big subevents with a time interval of about 12s are assumed on the fault plane in both the models, while the focal mechanism and the focal depth of the second subevent are different between these models. It is found that these models similarly explain the records at the Takada observatory from the Kanto earthquake. The maximum displacements of the reproduced horizontal ground motions are estimated about 20cm in NS component. and about 10cm in EW component. These results are consistent with the fact that the amplitudes of the records in NS component are strongly saturated compared with those in EW component.

著者

山中 浩明 古屋 伸二 野澤 貴 佐々木 透 高井 剛

出版者

日本建築学会

雑誌

日本建築学会構造系論文集 (ISSN:13404202)

巻号頁・発行日

vol.60, no.478, pp.99-105, 1995

被引用文献数

7 2

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Array measurements of vertical microtremors were done at Koto-ku, Tokyo in the Kanto plain, Japan, to deduce an S-wave velocity profile down to the top of seismic bedrock. The array consists of 13 sites with spacings of 0.2 to 4 km. Rayleigh wave phase velocities at periods from 0.8 to 5 sec were determined from a frequency-wave numeber spectrum analysis of the records. The observed phase velocities were inverted to an S-wave velocity profile by an inversion based on genetic algorithms assuming a four-layer model. The inverted profile has a sediment thickness that is thinner than those deduced by seismic refraction survey and a deep borehole near the array. We included Love wave phase velocity data determined from an earthquake array observation into the inversion of the phase velocity data from microtremor measurements. The resultant new structure is in a better agreement with deep borehole data than that inverted only from microtremor data.