研究者詳細 - 土川　覚

論文 - 土川　覚

分割表示 537 件中 501 - 520 件目／全件表示 >>

近赤外分光法による木材の非破壊計測 (第4報) 含有水分に関する検量線査読有り

TSUCHIKAWA Satoru, TORII Misato, TSUTSUMI Shigeaki

Journal of the Japan Wood Researh Society 42 巻 ( 8 ) 頁： 743 - 754 1996年8月

近赤外分光法による木材の非破壊計測(第2報)近赤外照射光の仮道管群における挙動と拡散反射・透過指向特性

土川覚, 堤成晃

木材学会誌 42 巻 ( 4 ) 頁： 343 - 353 1996年4月

近赤外分光法による木材の非破壊計測(第2報)近赤外照射光の仮道管群における挙動と拡散反射・透過指向特性査読有り

土川覚, 堤成晃

木材学会誌 42 巻 ( 4 ) 頁： 343 - 353 1996年4月

Noestructive Measurement of the Subsurface Structure of Biological Material Having Cellular Structure by Using Near-Infrared Spectroscopy. 査読有り

"Tsuchikawa, S., Hayashi, K., and Tsutsumi, S.,"

Applied Spectroscopy 50 巻頁： 1117-1124 1996年1月

近赤外分光法による木材の非破壊計測(第2報)-近赤外照射光の仮道管群における挙動と拡散反射・透過指向特性査読有り

"土川覚, 堤成晃,"

木材学会誌 42 巻頁： 343-353 1996年1月

近赤外分光法による木材の非破壊計測(第4報)-含有水分に関する検量線査読有り

"土川覚, 鳥居美里, 堤成晃,"

木材学会誌 42 巻頁： 743-754 1996年1月

近赤外分光法による木材の非破壊計測(第3報)-平行入射光に関する反射光および透過光の挙動査読有り

"土川覚, 堤成晃,"

木材学会誌 42 巻頁： 733-742 1996年1月

Noestructive Measurement of the Subsurface Structure of Biological Material Having Cellular Structure by Using Near-Infrared Spectroscopy. 査読有り

Tsuchikawa, S, Hayashi, K, Tsutsumi, S

Applied Spectroscopy 50 巻頁： 1117-1124 1996年1月

近赤外分光法による木材の非破壊計測(第4報)-含有水分に関する検量線査読有り

土川覚, 鳥居美里, 堤成晃

木材学会誌 42 巻頁： 743-754 1996年1月

近赤外分光法による木材の非破壊計測(第3報)-平行入射光に関する反射光および透過光の挙動査読有り

土川覚, 堤成晃

木材学会誌 42 巻頁： 733-742 1996年1月

近赤外分光法による木材の非破壊計測(第2報)-近赤外照射光の仮道管群における挙動と拡散反射・透過指向特性査読有り

土川覚, 堤成晃

木材学会誌 42 巻頁： 343-353 1996年1月

Application of near infrared spectrophotometry to wood .2. Behavior of irradiated light in an aggregate of tracheids and directional characteristics of diffuse reflected and transmitted light 査読有り

Tsuchikawa, S; Tsutsumi, S

MOKUZAI GAKKAISHI 42 巻 ( 4 ) 頁： 343 - 353 1996年

Application of near infrared spectrophotometry to wood .4. Calibration equations for moisture content 査読有り

Tsuchikawa, S; Torii, M; Tsutsumi, S

MOKUZAI GAKKAISHI 42 巻 ( 8 ) 頁： 743 - 754 1996年

Application of near infrared spectrophotometry to wood .3. Behavior of reflected and transmitted light for parallel beam of incident light 査読有り

Tsuchikawa, S; Tsutsumi, S

MOKUZAI GAKKAISHI 42 巻 ( 8 ) 頁： 733 - 742 1996年

Tsuchikawa S, Tsutsumi S

MOKUZAI GAKKAISHI 42 巻 ( 4 ) 頁： 343 - 353 1996年

Application of near infrared spectrophotometry to wood .4. Calibration equations for moisture content 査読有り

Tsuchikawa S, Torii M, Tsutsumi S

MOKUZAI GAKKAISHI 42 巻 ( 8 ) 頁： 743 - 754 1996年

Application of near infrared spectrophotometry to wood .3. Behavior of reflected and transmitted light for parallel beam of incident light 査読有り

Tsuchikawa S, Tsutsumi S

MOKUZAI GAKKAISHI 42 巻 ( 8 ) 頁： 733 - 742 1996年

Application of near infrared spectrophotometry to wood .4. Calibration equations for moisture content 査読有り

Tsuchikawa S, Torii M, Tsutsumi S

MOKUZAI GAKKAISHI 42 巻 ( 8 ) 頁： 743 - 754 1996年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Mokuzai Gakkaishi/Journal of the Japan Wood Research Society

This paper is aimed at the nondestructive quantitative assessment of the moisture condition in bulky wood by using near infrared spectrophotometry (NIRS). In the first stage of a series of experiments, the effect of moisture condition on the minimum sample thickness in which light was diffuse-reflected sufficiently, d0, was investigated. Secondly, the calibration equations for moisture conditions of some species having homogeneous water distributions; moisture contents in percents (MC), and per unit volumes (MV), were determined by multiple linear regression analysis based on the NIR reflectance spectra. Furthermore, the prediction error of moisture content for a sample having an inhomogeneous water distribution was found by which the scope of the application for actual moisture conditions in wood was investigated. Similar experiments also were made for the model samples which represented the condition of inhomogeneous water distribution to grasp the effect of water distribution in wood on the prediction error of the calibration equations. The results are summerlized as follows. (1) d0 changes in general with the moisture conditions, and the trend of do with moisture conditions varies with the wavelengths, whereas they arise from the same compounds of water. (2) When the explanatory variables and the number of them are selected suitably for the calibration equations, they perform sufficiently in predicting the moisture conditions independently of the wood species. Especially, in the case of the explanatory variables selected from the 2nd derivative spectra, the prediction error is less than that from the original spectra in both the criterion variables of MC and MV. This is noticeable in the case of the calibration equation for MC. (3) For a sample having an inhomogeneous water distribution, it is important to select the wavelengths suitably as the explanatory variables in consideration of the minimum sample thickness in which light is sufficiently diffuse-reflected. (4) A model experiment was made in which the stepwise distribution of moisture content was given to the test pieces. The thickness of the surface-side part in a sample and the difference of moisture contents between the surface-side part and the back-side part in a sample govern the predicted values of the moisture contents and the features of which are made clear.

回転丸のこの振動特性(第5報)歯数およびスリットの振動振幅、放射音への影響査読有り

木材学会誌 40 巻 ( 12 ) 頁： 148 1994年

回転丸のこの振動特性(第5報)歯数およびスリットの振動振幅、放射音への影響査読有り

木材学会誌 40 巻 ( 2 ) 頁： 148 - 157 1994年

　前のページ - 次のページ　

<土川 覚>

論文 - 土川 覚

<土川　覚>

論文 - 土川　覚