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Description of sand–metal friction behavior based on subloadingfriction model

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Friction 2022年第10期10卷 1660-1675页

作者： Toshiyuki OZAKI Yuki YAMAKAWA masami ueno Koichi HASHIGUCHI Kyushu Electric Engineering Consultants Inc. Fukuoka 810-0005Japan Department of Civil and Environmental Engineering Tohoku UniversitySendai 980-8579Japan University of the Ryukyus Okinawa 903-0213Japan MSC Software Ltd. Tokyo 101-0054Japan Kyushu University Fukuoka 819-0395Japan

A subloading-friction model is formulated to describe the smooth transient variation from static friction to kinetic friction,the recovery to static friction after the sliding velocity decreases,and the accumulation of sliding displacement under the cyclic loading of contact *** the past relevant studies,however,the model formulation used for simulations is limited to the hypoelastic-based plasticity framework,and the validation of the model is limited to simulations of the test data for metal-to-metal *** this study,the formulation of the subloading-friction model based on a hyperelastic-based plasticity framework is *** the fields of civil,geotechnical,agricultural engineering,and terramechanics,the interaction between soils and metals is critical,as reflected in construction and agricultural machinery,foundation piles,and retaining *** validity of the model for describing the friction between various sands and metals is verified by simulations of the experimental data under monotonic and cyclic loadings.

关键词： subloading-friction model sand-metal friction monotonic/cyclic sliding static/kinetic friction

Daytime-nighttime variations in the concentration of PM_(0.1) carbonaceous particles during a biomass fire episode in Chiang Mai,Thailand

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Particuology 2024年第4期87卷 316-324页

作者： Worradorn Phairuang Thaneeya Chetiyanukornkul Phuchiwan Suriyawong Sotasing Ho Phakphum Paluang masami Furuuchi Muhammand Amin Mitsuhiko Hata Faculty of Gesciences and CivilEngineering Institute of Science and Enginering Kanazawa UniverityKanazawaIshkawa92192Japan Department of Geography Faculty of Social SciencesChiang Mai UniversityMuangChiang Mai 50200Thailand Department of Biology Faculty of ScienceChiang Mai UniversityMuangChiang Mai50200Thailand Research Unit for Eergyonomics and Eological Management Multidisciplinary Research Insttute Chiang Mai UniversityChiang Mai50200Thailand Management and Development Training Program Office National Institute of ScienceTechnology and Innovation120601Cambodia Faculty of Engineering Maritim University of Raja Ali HajTanjung PinangKepulauan Riau29115Indonesia

Carbonaceous aerosols affect air quality adversely,affect global warming,and human ***,our understanding of the impact of ultrafine(PM_(0.1))carbonaceous particulate matter is incomplete,particularly the effects during haze *** study monitored diurnal variations in PM_(0.1) in Chiang Mai,Thailand,from March to April *** investigated carbonaceous PM_(0.1) collected by an ambient nano-sampler and evaluated their effect by using a carbon analyzer(IMPROVE_TOR).The results showed that burning large open areas in the dry season was crucial for increasing the particle mass concentration because of the large open burnings that occurred in this *** majority of biomass fires near the sampling site occurred during the night,which would allow more particles to be released thus resulting in higher concentrations of PM_(0.1).Hence,the release of PM_(0.1) during the night would obviously result in higher concentrations than that during the *** the eight carbon profiles,organic carbon 3(OC3)was predicted to be a marker of biomass *** carbon indices displayed that PM_(0.1) was influenced by biomass burning both daytime and *** findings reported herein should be of great impor-tance in terms of establishing biomass burning control policies for mitigating heavy haze pollution in Thailand and elsewhere.

关键词： Biomass burning Carbon Forest fires Nanoparticles Ultrafine particles

不同栽培法和收割期对甘蔗单产及含糖量影响的分析

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中国生态农业学报 2009年第5期17卷 992-996页

作者：孙丽娅上野正实永田雅辉苏州市职业大学苏州215104 日本琉球大学农学院日本冲绳9010213 日本宫崎大学农学院日本宫崎8892192

本研究利用1975～2008年33年间日本南大东岛甘蔗生产数据,分析了甘蔗栽培方法[新苗种植(包括夏植和春植)、宿根]和收割时期对其产量、品质和经济性的影响。结果表明,不同栽培法甘蔗多年平均产量依次为夏植>宿根>春植;新植甘蔗的种植期... 详细信息

本研究利用1975～2008年33年间日本南大东岛甘蔗生产数据,分析了甘蔗栽培方法[新苗种植(包括夏植和春植)、宿根]和收割时期对其产量、品质和经济性的影响。结果表明,不同栽培法甘蔗多年平均产量依次为夏植>宿根>春植;新植甘蔗的种植期越早产量越高;宿根甘蔗产量与前茬甘蔗的收割期呈二次函数曲线关系,前茬甘蔗收割过早或过迟均对宿根甘蔗生长不利;宿根甘蔗产量随宿根次数增加呈下降趋势;宿根甘蔗含糖量通常高于新植甘蔗,且不同栽培法下3月下旬前收获的甘蔗含糖量随收割期后延而逐渐增加。在此基础上,建立了依据栽培方法、收割时期预测甘蔗单产和含糖量的数学模型,模型对我国甘蔗种植业具有理论和实际的参考价值。

关键词：甘蔗栽培法新植甘蔗宿根甘蔗收割时期产量含糖量数学预测模型

基于遗传算法(GA)解甘蔗收割顺序最优化问题的研究

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中国生态农业学报 2009年第6期17卷 1273-1277页

作者：孙丽娅上野正实大岭政朗苏州市职业大学苏州215104 日本琉球大学日本冲绳9010213 日本农林水产省九州冲绳农业试验中心日本宫崎8850091

本研究以已建立的栽培方法、收割时期预测甘蔗单产和含糖量的数学模型为基础,提出将寻求最佳收割顺序、收割期归结为最优化组合问题,并探讨了遗传算法(GA)的解题适用性,同时进行了几种基本设定的栽培方法推移、栽培方法构成项量、行列... 详细信息

本研究以已建立的栽培方法、收割时期预测甘蔗单产和含糖量的数学模型为基础,提出将寻求最佳收割顺序、收割期归结为最优化组合问题,并探讨了遗传算法(GA)的解题适用性,同时进行了几种基本设定的栽培方法推移、栽培方法构成项量、行列式特性的定性分析,为求最佳的甘蔗收割顺序、收割期、不同栽培方法的面积等提供解析方法。为不使栽培方法的构成比例发生变化,与通常GA算法采用交叉在不同个体间互相交替进行不同,开发了适用本研究的GA的自己交叉具体解析法。将收割第1年期作为过渡状态,第2年期为安定状态,将两期目的函数的合并作为一个适应度进行评价。

关键词：甘蔗收割顺序收割期遗传算法(GA) 自己交叉最优化

Size-fractionated carbonaceous particles and climate effects in the eastern region of Myanmar

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Particuology 2024年第7期90卷 31-40页

作者： Mai Kai Suan Tial Nwe Nwe Kyi Muhammad Amin Mitsuhiko Hata masami Furuuchi Rahmi Mulia Putri Phakphum Paluang Phuchiwan Suriyawong Worradorn Phairuang Department of Electrical Power Engineering Yangon Technological UniversityYangon11011Myanmar Faculty of Geosciences and Civil Engineering Institute of Science and EngineeringKanazawa UniversityKanazawaIshikawa920-1192Japan Faculty of Engineering Maritim University of Raja Ali HajiTanjung PinangKepulauan Riau 29115Indonesia Graduate School of Natural Science and Technology Kanazawa UniversityKanazawaIshikawa920-1192Japan Department of Geography Faculty of Social SciencesChiang Mai UniversityMuangChiang Mai50200Thailand Research Unit for Energy Economics and Ecological Management Multidisciplinary Research InstituteChiang Mai UniversityMuangChiang Mai50200Thailand

This study reports on an investigation of fine and coarse carbonaceous particulate matters(PM)in Tachileik,eastern Myanmar,during the dry and wet seasons of *** carbon compositions,including organic carbon(OC)and elemental carbon(EC),in each size(PM10-2.5,PM2.5-1.0,and PM1.0-0.5)were determined by a carbon *** average total mass concentration of the three fractions of particle samples during the dry season was higher(51.23±23.86μg/m3)than that of the wet season(14.00±5.26μg/m3).The results indicate that OC and EC levels were highest for PM1.0-0.5 during the dry season and the sizes were similar for both *** OC/EC ratios varied in different seasons,from 1.93 to 4.40 and 4.13 to 5.25 in the dry and wet seasons,*** was sub-divided into char-EC and soot-EC;the char-EC/soot-EC in the dry season was higher than in the wet season,signifying that biomass burning is the main particle source during the dry ***,vehicle emissions dominated during the wet *** effective carbon ratio(ECR)suggested that finer particles contributed more to global *** information is important in terms of air quality control and mitigation in Myanmar and elsewhere.

关键词： Air quality Biomass burning Carbon Coarse particles Fine particles Myanmar

基于NIR和GIS的甘蔗含糖量与种植条件关系研究

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中国生态农业学报 2010年第6期18卷 1335-1339页

作者：杜建红孙丽娅张永康上野正实川满芳信苏州市职业大学苏州215104 日本琉球大学农学院日本冲绳9010213

为监测较大区域内甘蔗产量及含糖量的时间、空间变化情况,了解地区、环境及土壤成分与甘蔗含糖量的关系,为甘蔗栽培提供指导,以日本琉球群岛南大东岛甘蔗栽培区为对象,用NIR方法测定甘蔗含糖量及其他成分含量,采用GIS技术建立地块位置... 详细信息

为监测较大区域内甘蔗产量及含糖量的时间、空间变化情况,了解地区、环境及土壤成分与甘蔗含糖量的关系,为甘蔗栽培提供指导,以日本琉球群岛南大东岛甘蔗栽培区为对象,用NIR方法测定甘蔗含糖量及其他成分含量,采用GIS技术建立地块位置、甘蔗产量、含糖量及P、K含量和土壤K含量数据库。在此基础上,建立3个栽培年度甘蔗含糖量、单产与甘蔗汁P、K含量的空间分布图,发现甘蔗含糖量与降水量及种植区水环境密切相关。对甘蔗含糖量及P、K含量和土壤K含量的相关分析表明,甘蔗含糖量与甘蔗汁P含量呈正相关,而与甘蔗汁和土壤K含量均呈负相关。

关键词： NIR GIS 甘蔗含糖量产量 P K

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三段式炭化装置及炭化工艺参数研究

机械设计与制造 2010年第12期 186-188页

作者：杜建红孙丽娅张永康上野正实川满芳信苏州市职业大学苏州215104 日本琉球大学农学院冲绳9010213

应用新型三段式碳化装置进行甘蔗渣炭化,对原材料含水量、炉内温度、能耗、设定温度等因子对炭化效果的影响进行了研究,优化了炭化装置的工艺参数,为农业生产废弃物的循环利用提供技术支撑。结果表明:下段炭化炉设定温度为600℃、甘蔗... 详细信息

应用新型三段式碳化装置进行甘蔗渣炭化,对原材料含水量、炉内温度、能耗、设定温度等因子对炭化效果的影响进行了研究,优化了炭化装置的工艺参数,为农业生产废弃物的循环利用提供技术支撑。结果表明:下段炭化炉设定温度为600℃、甘蔗渣含水量低于20%时,不能稳定工作;甘蔗渣含水量大于20%时,炉内温度接近设定温度并能保持稳定工作状态;甘蔗渣含水量为40%左右时,炭化分解生成的可燃气体能满足自燃的炭化要求,能耗较低;炭化炉温度700℃时,甘蔗渣碳素率较高,炭化收成率为20%左右。

关键词：三段式炭化炉碳化装置化工艺参数研究 technological parameters 甘蔗渣设定温度含水量大稳定工作状态炉内温度循环利用农业生产能耗技术支撑工艺参数原材料可燃气化效果废弃物

Prophylactic Pattern Scanning Laser Retinal Photocoagulation for Diabetic Retinopathy in Spontaneously Diabetic Torii Fatty Rats: Preliminary Experimental Results

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Journal of Diabetes Mellitus 2024年第3期14卷 153-165页

作者： Rina Takagi Yoshiaki Tanaka Tetsuya Hasegawa masami Shinohara Yasushi Kageyama Tomohiko Sasase Machiko Shimmura-Tomita Akihiro Kakehashi Toshikatsu Kaburaki Department of Ophthalmology Saitama Medical Center Jichi Medical University Saitama-shi Saitama-ken Japan Tokyo Animal & Diet Department CLEA Japan Inc. Tokyo Japan Biological/Pharmacological Research Laboratories Central Pharmaceutical Research Institute Japan Tobacco Inc. Takatsuki Osaka Japan

Research Background and Purpose: The number of diabetic patients is rapidly increasing, making it crucial to find methods to prevent diabetic retinopathy (DR), a leading cause of blindness. We investigated the effects of prophylactic pattern scanning laser retinal photocoagulation on DR development in Spontaneously Diabetic Torii (SDT) fatty rats as a new prevention approach. Methods: Photocoagulation was applied to the right eyes of 8-week-old Spontaneously Diabetic Torii (SDT) fatty rats, with the left eyes serving as untreated controls. Electroretinography at 9 and 39 weeks of age and pathological examinations, including immunohistochemistry for vascular endothelial growth factor and glial fibrillary acidic protein at 24 and 40 weeks of age, were performed on both eyes. Results: There were no significant differences in amplitude and prolongation of the OP waves between the right and left eyes in SDT fatty rats at 39 weeks of age. Similarly, no significant differences in pathology and immunohistochemistry were observed between the right and left eyes in SDT fatty rats at 24 and 40 weeks of age. Conclusion: Prophylactic pattern scanning retinal laser photocoagulation did not affect the development of diabetic retinopathy in SDT fatty rats.

关键词： Diabetes Pattern Scanning Laser Diabetic Retinopathy Spontaneously Diabetic Torii Fatty Rats Electroretinography

Design Method of Guide Vane for Wells Turbine

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Journal of Thermal Science 2006年第2期15卷 126-131页

作者： masami SUZUKI Department of Mechanical Engineering Graduate School of Engineering The University of Tokyo

Guide vanes are installed in the Wells turbine in order to improve its efficiency, self-rotating characteristics and off design performance with stall. This work attempts to explain the role of these guide vanes on the basis of momentum theory. It is shown that the upstream vanes are more effective in enhancing efficiency than the downstream ones. A design method for guide vanes is suggested based on experimental data and potential theory. Experimental studies carried out by the author confirm the theory proposed.

关键词： wells turbine guide vane cascade potential flow wave energy converter ocean engineering