研究者詳細 - 土川　覚

論文 - 土川　覚

分割表示 537 件中 401 - 420 件目／全件表示 >>

Application of time-of-flight near infrared spectroscopy for detecting sugar content and acidity in apples 招待有り

"Tsuchikawa, S.; Hamada, T."

NIR news 14 巻頁： 6-8 2003年1月

Discriminant Analysis of Wood Based Materials with Weathering Damage by Near Infrared Spectroscopy 査読有り

"Tsuchikawa, S.; Yamato, K."

Journal of Near Infrared Spectroscopy 11 巻頁： 391-399 2003年1月

Near-Infrared Spectroscopic Comparison of Antique and Modern Wood 査読有り

Yonenobu, H, Tsuchikawa, S

Applied Spectroscopy 57 巻 ( 11 ) 頁： 1451-1453 2003年1月

Application of time-of-flight near-infrared spectroscopy for detection of sugar content and acid degrees in Satsuma Mandarin 査読有り

Tsuchikawa, S, Sakai, E, Inoue, K, Miyamoto, K

Journal of American Society of Horticultural Science 128 巻頁： 391-396 2003年1月

Application of time-of-flight near infrared spectroscopy for detecting sugar content and acidity in apples 招待有り査読有り

Tsuchikawa, S, Hamada, T

NIR news 14 巻頁： 6-8 2003年1月

Application of Near Infrared Spectroscopy to Light-Irradiated Wood 査読有り

Mitsui, K, Tsuchikawa, S

Holz als Roh- und Werkstoff 61 巻頁： 159-160 2003年1月

Near-infrared Spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part II: Hardwood 査読有り

Tsuchikawa, S., Siesler, H.

Applied Spectroscopy 57 巻 ( 6 ) 頁： 675-681 - 681 2003年1月

Spectroscopic Monitoring of Biomass Modification by Light-Irradiation with Heat Treatment 査読有り

"Tsuchikawa, S.; Murata, A.; Kohara, M.; Mitsui K."

Journal of Near Infrared Spectroscopy 11 巻頁： 401-405 2003年

光照射-熱処理による木材の強度変化

小原光博, 三井勝也, 村田明宏, 土川覚

岐阜大学教育学部研究報告自然科学 28 巻 ( 1 ) 頁： 61 - 63 2003年

光照射-熱処理による木材表面への画像転写

小原光博, 三井勝也, 村田明宏, 土川覚

岐阜大学教育学部研究報告自然科学 28 巻 ( 1 ) 頁： 57 - 60 2003年

Discriminant analysis of wood-based materials using near-infrared spectroscopy

Tsuchikawa S, Yamato K, Inoue K

JOURNAL OF WOOD SCIENCE 49 巻 ( 3 ) 頁： 275 - 280 2003年

Discriminant analysis of wood-based materials with weathering damage by near infrared spectroscopy

Tsuchikawa S, Yamato K

JOURNAL OF NEAR INFRARED SPECTROSCOPY 11 巻 ( 5 ) 頁： 391 - 399 2003年

Non-destructive near infrared spectroscopic measurement of antique washi calligraphic scrolls

Yonenobu H, Tsuchikawa S, Oda H

JOURNAL OF NEAR INFRARED SPECTROSCOPY 11 巻 ( 5 ) 頁： 407 - 411 2003年

近赤外分光法による木質系廃棄物の判別分析

土川覚, 山登香織

木材保存 29 巻 ( 6 ) 頁： 259 - 262 2003年

Discriminant analysis of wood-based materials with weathering damage by near infrared spectroscopy 査読有り

S Tsuchikawa, K Yamato

JOURNAL OF NEAR INFRARED SPECTROSCOPY 11 巻 ( 5 ) 頁： 391 - 399 2003年

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：N I R PUBLICATIONS

This research was aimed at finding a suitable discriminate technique for wood-based materials which had suffered from weathering damage, as an analogue of waste wood condition, by means of near infrared (NIR) spectroscopy and several kinds of chemometrics. The feasibility of Mahalanobis generalised distance, K nearest neighbours (KNN) or soft independent modelling of class analogy (SIMCA) as the classification method of wooden materials was examined in detail. The differences in the accuracy of classification with the spectrophotometer (for example, laboratory use and field use), pre-treatment of NIR spectra or the wavelength range as the explanatory variables were also taken into account. Five categories of wood-based materials (solid wood, laminated wood, particle or fibreboard, impregnated wood and overlaid wood) were exposed to outdoor sunlight for up to six months. It was difficult to apply Mahalanobis generalised distance to the classification of five material types where the NIR spectra varied greatly with the sample categories. Both of KNN and SIMCA presented the highest correct classification of over 93%, independent of the spectrophotometer. These results support the applicability of NIR spectroscopy to the classification of waste wood at the actual factory and job site.

Web of Science

Application of near-infrared spectroscopy to wood discrimination 査読有り

S Tsuchikawa, K Inoue, J Noma, K Hayashi

JOURNAL OF WOOD SCIENCE 49 巻 ( 1 ) 頁： 29 - 35 2003年

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER-VERLAG TOKYO

This study deals with a new nondestructive discriminant analysis by which wood can be classified on the basis of a combination of near-infrared (NIR) spectroscopy and Mahaianobis' generalized distance. Its accuracy and reasonability were examined for wood samples with various moisture contents ranging from oven-dried to a fully saturated free water state. In a discriminant analysis employing second derivative spectra, each wood group was well distinguished. Mahalanobis' generalized distances between softwoods are relatively independent of analytical pattern, whereas the distances between hardwoods are large for easy classification. There may be two reasons for selecting a wavelength: (1) when the chemical component of wood substance relates to the discriminant analysis; and (2) when the difference in moisture content with wood species relates to them. When we correctly construct the database of NIR spectra, confirming the purpose of the analysis, suitable wood discrimination should be possible.

Web of Science

Discriminant analysis of wood-based materials using near-infrared spectroscopy 査読有り

S Tsuchikawa, K Yamato, K Inoue

JOURNAL OF WOOD SCIENCE 49 巻 ( 3 ) 頁： 275 - 280 2003年

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER-VERLAG TOKYO

This study deals with the suitable discriminant techniques of wood-based materials by means of near-infrared spectroscopy (NIRS) and several chemometric analyses. The concept of Mahalanobis' generalized distance. K nearest neighbors (KNN), and soft independent modeling of class analogy (SIMCA) were evaluated to determine the best analytical procedure. The difference in the accuracy of classification with the spectrophotometer. the wavelength range as the explanatory variables, and the light-exposure condition of the sample were examined in detail. It was difficult to apply Mahalanobis' generalized distances to the classification of wood-based materials where NIR spectra varied widely within the sample category. The performance of KNN in the NIR region (800-2500nm). for which the device used in the laboratory was employed, exhibited a high rate of correct answers of validation (>98%) independent of the light-exposure conditions of the sample. When employing the device used in the field. both KNN and SIMCA revealed correct answers of validation (>88%) at wavelengths of 550-1010nm. These results suggest the applicability of NIRS to a reasonable classification of used wood at the factory and at job sites.

Web of Science

光照射-熱処理による木材表面への画像転写査読有り

小原光博, 三井勝也, 村田明宏, 土川覚

岐阜大学教育学部研究報告自然科学 28 巻 ( 1 ) 頁： 57 - 60 2003年

光照射-熱処理による木材の強度変化査読有り

小原光博, 三井勝也, 村田明宏, 土川覚

岐阜大学教育学部研究報告自然科学 28 巻 ( 1 ) 頁： 61 - 63 2003年

Application of near-infrared spectroscopy to wood discrimination 査読有り

Tsuchikawa S, Inoue K, Noma J, Hayashi K

JOURNAL OF WOOD SCIENCE 49 巻 ( 1 ) 頁： 29 - 35 2003年

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