Journal of the Society of Agricultural Structures, Japan最新文献_第4页

Production of Biodegradable Composite Material from PLA and Finely-Milled Bagasse 以聚乳酸和细磨甘蔗渣为原料制备可生物降解复合材料

Journal of the Society of Agricultural Structures, Japan Pub Date : 2008-03-25 DOI: 10.11449/SASJ1971.38.285

Jun Li, K. Intabon, Y. Ishikawa, Y. Kitamura, H. Hasimoto, T. Satake

引用次数: 0

Reinforcement for Pipe-Framed Greenhouse under Snow Load and Design Optimization Considering Steel Mass 雪荷载下管架温室的加固及考虑钢质量的优化设计

Journal of the Society of Agricultural Structures, Japan Pub Date : 2008-03-25 DOI: 10.11449/SASJ1971.38.263

Hideki Moriyama, D. R. Mears, S. Sase, A. Ikeguchi, Tomoharu Yamaguchi

{"title":"Reinforcement for Pipe-Framed Greenhouse under Snow Load and Design Optimization Considering Steel Mass","authors":"Hideki Moriyama, D. R. Mears, S. Sase, A. Ikeguchi, Tomoharu Yamaguchi","doi":"10.11449/SASJ1971.38.263","DOIUrl":"https://doi.org/10.11449/SASJ1971.38.263","url":null,"abstract":"To investigate the low-cost reasonable design of a pipe-framed greenhouse (pipe house) under snow load, seven numerical finite element models of simple pipe houses were analyzed by stress analysis and buckling analysis. These determined the optimum position of bracing for pipe houses. The influence of the width and ridge height of the structure and the section modulus of the arch pipes on the upper limit of the allowable snow load was also obtained. Moreover, the relationship between a reasonable pipe house design and the arch pipe used for the structure was investigated. For the structures modified by the addition of two tension braces at points between 63% to 70% of the ridge height, the allowable snow load was significantly increased. The influence of addition of braces was remarkable for wider spans. There was little influence from the difference of the ridge height of the pipe house on the maximum allowable snow load for the heights considered using stress analysis. However, the maximum allowable snow load obtained by the buckling analysis decreased 54% as the ridge height increased so a buckling analysis is important. Considering the change of the support condition due to softening of the ground, increasing the size of the pipe section increases the allowable pipe spacing and reduces the total steel mass and shading of the structure. For a typical size pipe house, by replacing arch pipes of 19.1 mm diameter with 1.1 mm thickness by pipes of 42.7 mm diameter with 2.0 mm thickness, steel mass and shading rate decreased by 58% and 77% respectively.","PeriodicalId":218229,"journal":{"name":"Journal of the Society of Agricultural Structures, Japan","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131771153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

A Multi-pronged Technology for Evaluating Tastes in Rice (Part 2) 多管齐下的大米口感评价技术(下)

Journal of the Society of Agricultural Structures, Japan Pub Date : 2007-12-25 DOI: 10.11449/SASJ1971.38.183

Naoko Motohashi, T. Sugiyama, S. Tojo, Kengo Watanabe

引用次数: 0

A Multi-pronged Technology for Evaluating Tastes in Rice (Part 1) 多管齐下的大米口感评价技术(上)

Journal of the Society of Agricultural Structures, Japan Pub Date : 2007-12-25 DOI: 10.11449/SASJ1971.38.175

Naoko Motohashi, T. Sugiyama, S. Tojo, Kengo Watanabe

引用次数: 0

Feasibility Study of Commercial Bio-ethanol Production in the Tokachi Region, Hokkaido 北海道德胜地区商业化生产生物乙醇的可行性研究

Journal of the Society of Agricultural Structures, Japan Pub Date : 2007-12-25 DOI: 10.11449/SASJ1971.38.199

S. Kikuchi, Takeshi Kobayashi, Y. Inoue, Y. Takeuchi, K. Nishizaki, K. Umetsu

引用次数: 0

Evaluation of Tomato Quality on Tree and after Harvesting using Portable NIR Spectroscopy 便携式近红外光谱法评价番茄树下及采后品质

Journal of the Society of Agricultural Structures, Japan Pub Date : 2007-09-25 DOI: 10.11449/SASJ1971.38.117

Kusumiyati, T. Akinaga, S. Yonemori, S. Kawasaki, T. Tanabe

{"title":"Evaluation of Tomato Quality on Tree and after Harvesting using Portable NIR Spectroscopy","authors":"Kusumiyati, T. Akinaga, S. Yonemori, S. Kawasaki, T. Tanabe","doi":"10.11449/SASJ1971.38.117","DOIUrl":"https://doi.org/10.11449/SASJ1971.38.117","url":null,"abstract":"The use of a portable near infrared instrument was evaluated to determine the soluble solids content, moisture content, and hue color value of tomatoes on tree and after harvesting. Calibration models were constructed using data from the winter season and summer season in order to make the model as robust as possible. The 247 samples data were randomly split into 122 samples for calibration and 125 samples for prediction. The results of the correlation coefficient (R) and standard error of calibration (SEC) values for the calibration model, which were obtained using the PLS regressions of the soluble solids content, moisture content and hue color value of the tomatoes after harvesting are 0.95 (0.26), 0.81 (1.85), and 0.94 (3.32), respectively. The positive and similar trend linear correlation of the calibration and prediction of the soluble solids content, moisture content, and hue color value from the winter season and summer season data is shown for the tomatoes on the tree and after harvesting, but have relatively differences in coefficient correlation. Based on the NIR measurement on the tree technique, the farmers can determine the harvesting time until the desired quality for example soluble solids content and reduce the sorting lose.","PeriodicalId":218229,"journal":{"name":"Journal of the Society of Agricultural Structures, Japan","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116112535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Evaluation of Uncertainty of the Grain Moisture as Measured by the Drying Method 干燥法测定谷物水分的不确定度评定

Journal of the Society of Agricultural Structures, Japan Pub Date : 2007-09-25 DOI: 10.11449/SASJ1971.38.127

Hideyuki Tanaka, M. Yabe, Toshimichi Watanabe

引用次数: 0

Production of Biodegradable Films from PLA and Bagasse 用聚乳酸和甘蔗渣制备可生物降解薄膜

Journal of the Society of Agricultural Structures, Japan Pub Date : 2007-09-25 DOI: 10.11449/SASJ1971.38.141

Jun Li, K. Intabon, T. Maekawa

引用次数: 0

Effects of Vibration Frequency and Direction on Damage of Strawberries 振动频率和方向对草莓损伤的影响

Journal of the Society of Agricultural Structures, Japan Pub Date : 2007-09-25 DOI: 10.11449/SASJ1971.38.101

N. Nakamura, H. Umehara, H. Okadome, K. Nakano, S. Maezawa, T. Shiina

引用次数: 8

Electrochemical Treatment of Methane Fermentation Effluent using Ti/Pt-IrO2 and Iron Electrodes Ti/Pt-IrO2和铁电极电化学处理甲烷发酵出水

Journal of the Society of Agricultural Structures, Japan Pub Date : 2007-09-25 DOI: 10.11449/SASJ1971.38.109

M. Abe, Xiaohui Lei, T. Maekawa, T. Satake

引用次数: 0