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Experimental and numerical study of water sprayed turbulent combustion: Proposal of a neural network modeling for five-dimensional flamelet approach

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能源与人工智能(英文) 2021年第3期5卷 316-324页

作者： Takafumi Honzawa Reo Kai kotaro hori Makoto Seino Takayuki Nishiie Ryoichi Kurose Department of Mechanical Engineering and Science Graduate School of EngineeringKyoto UniversityKyoto daigaku-KatsuraNishikyo-kuKyoto 615-8540Japan Tokyo Gas Co. Ltd.1-7-7 Suehiro-choTsurumi-kuYokohamaKanagawa 230-0045Japan Numerical Flow Designing Co. Ltd.1-10-10Higashi-GotandaShinagawa-kuTokyo 141-0022Japan

Owing to the increasing worldwide demand for natural gas,the development of a large submerged combustion vaporizer is *** burner is equipped with a water spray nozzle to reduce nitrogen oxides,and a practi-cal simulation method is required for the optimal *** non-adiabatic flamelet approach can predict the combustion emissions and is useful for reducing simulation ***,as the number of control variables increases,the database requires larger memory and cannot be dealt with by general *** this study,an artificial neural network(ANN)model based on a five-dimensional flamelet database,which includes the effects of heat loss and vapor concentration by sprayed water evaporation,is ***,large eddy sim-ulations(LESs)for turbulent combustion fields with and without water spray are conducted employing flamelet generated manifold(FGM)approach with this ANN model,and the validity is *** comparison,a lab-scale burner equipped with a water spray nozzle is manufactured,and combustion experiments with and without water spray are *** results show that CO,NO,temperature,and reaction rate of progress variable predicted by the present ANN model are in good agreement with those of a five-dimensional flamelet *** the condition without water spray,the flame behavior predicted by the LES employing the FGM/ANN ap-proach is in good agreement with that employing the conventional FGM approach,while indicating much lower memory,although there appeared some quantitative discrepancies in the temperature against the experiment probably partially because of the insufficiency of the FGM approach for the present complex flame *** the condition with water spray,the LES employing the FGM/ANN approach is able to capture the effect of the water spray on the flame behavior in the experiment,such that the water spray decreases the temperature,which causes the decrease in NO but increase in CO.

关键词： Neural network modeling Five-dimensional flamelet approach Water spray Large eddy simulation

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The Association between Activity of Daily Living and the Combination of Alzheimer’s Disease and Cataract in Elderly Requiring Nursing Care

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Health 2016年第10期8卷 994-1003页

作者： Toshio Hamagishi Toshimitsu Inagawa Yasuhiro Kambayashi Hiromasa Tsujiguchi Masami Kitaoka Junko Mitoma Hiroki Asakura Fumihiko Suzuki Daisuke hori Enoch Olando Anyenda Nguyen Thi Thu Thao Yuri Hibino Koichi Hayashi Aki Shibata Takiko Sagara Jiro Okochi Kiyoshi Takamoku kotaro Hatta Tadashi Konoshita Hiroyuki Nakamura Department of Environmental and Preventive Medicine Graduate School of Medical Science Kanazawa University Ishikawa Japan Department of Food Sciences and Nutrition School of Human Environmental Sciences Mukogawa Women’s University Hyogo Japan Department of Lifestyle Studies Kobe Shoin Women’s University Hyogo Japan Department of Nutritional Sciences for Well-Being Kansai University of Welfare Sciences Osaka Japan Japan Association of Geriatric Health Service Facilities Tokyo Japan Department of Psychiatry Juntendo University Nerima Hospital Tokyo Japan Third Department of Internal Medicine Fukui University School of Medicine Fukui Japan

Some clinical and epidemiological studies have suggested that Alzheimer’s Disease (AD) and cataract, may share common pathogenetic mechanisms, subsequently a positive association between the prevalence of AD and cataract, although other studies found no significant relationship between dementia and visual impairment including cataract in the elderly. Little is known about the association between Activity of Daily Living (ADL) and the combination of AD and cataract. To examine the association between ADL and the combination of AD and cataract, we performed a national survey in nursing care institutions in Japan, examining the decreased ADL in elderly with and without AD and cataract for 453 elderly aged 85.0 ± 8.13 years. The proportion, 43.5% of AD in subjects without cataract was significantly higher than that, 23.5% with cataract. Almost all ADL in AD with cataract was significantly lower than that without cataract, although all ADL in cataract patients receiving surgery in AD was significantly (all p < 0.002) higher than that in cataract patients without surgery in AD, as was confirmed by the multiple regression analysis incorporating into the relevant factors as independent variables. These results showed that ADL scores including cognitive functions decreased by cataract were increased by the surgery in the patients with AD. A significantly negative association between AD and cataract seen in our data, which was inconsistent with the previous result, might lead to the necessities of the clinical diagnosis for slight severity of cataract for patients with AD.

关键词： Alzheimer’s Disease Cataract Elderly Activity of Daily Living Cognitive Function

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