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A comparative study on demineralization of coals by acid-washing and solvent-extraction methods for low temperature catalytic coal gasification application

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Carbon Resources Conversion 2019年第3期2卷 175-181页

作者： Atul Sharma Akimitsu matsumura Research Institute of Energy Frontier Non-conventional Carbon Resources GroupNational Institute of Advanced Industrial Science&Technology16-1OnogawaTsukubaJapan

Catalytic coal gasification is an efficient way to achieve high conversion rates at low *** loss due to the reaction between the inherent mineral matter in the coal and the catalyst is a major hurdle for its practical *** problem may be overcome by removing the mineral matter from the coal before *** demineralizing approaches,acid-washing and solvent-extraction methods are investigated for demineralizing the *** analysis,XRD analysis,NMR analysis,and N_(2)adsorption analysis were made to compare the demineralization efficiency,crystallographic carbon microstructure,chemical structure,and micro-porosity,***-extraction method was found be more efficient for *** was observed in the chemical structure and micro-porosity while crystallographic carbon-microstructure was found to be ***-catalytic and catalytic gasification reactivity of the chars obtained by the two methods was *** composition and gas evolution profiles were also obtained and found to be influenced by the degree of demineralization.

关键词： Coal Demineralization Acid washing Solvent extraction Catalytic gasification

A general extension theorem for cohomology classes on non reduced analytic subspaces

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Science China Mathematics 2017年第6期60卷 949-962页

作者： CAO JunYan DEMAILLY Jean-Pierre matsumura Shin-ichi Institut de Mathématiques de Jussieu UniversitéPierre et Marie CurieParis 75252France Institut Fourier UniversitéGrenoble AlpesGlares 38610France Mathematical Institute Tohoku UniversitySendal 980-8578Japan

The main purpose of this paper is to generalize the celebrated L^2 extension theorem of Ohsawa and Takegoshi in several directions: The holomorphic sections to extend are taken in a possibly singular hermitian line bundle, the subvariety from which the extension is performed may be non reduced, the ambient manifold is K¨ahler and holomorphically convex, but not necessarily compact.

关键词： compact Kahler manifold singular hermitian metric coherent sheaf cohomology Dolbeault coho- mology plurisubharmonic function L2 estimates Ohsawa-Takegoshi extension theorem multiplier ideal sheaf

Development of a GIS-based Decision Support System for Assessing Land Use Status

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Geo-Spatial Information Science 2004年第1期7卷 72-78页

作者： Ryosuke Shibasaki Kanichiro matsumura CENTER FOR SPATIAL INFORMATION SCIENCE THE UNIVERSITY OF TOKYO

The objectives of this study are to assess land s ui tability and to predict the spatial and temporal changes in land use types (LUTs ) by using GIS-based land use management decision support system. A GIS databas e with data on climate, topography, soil characteristic, irrigation condition, f ertilizer application, and special socioeconomic activities has been developed a nd used for the evaluation of land productivity for different crops by integrati ng with a crop growth model-the erosion productivity impact calculator (EPIC). International food policy simulation model (IFPSIM) is also embedded into GIS fo r the predictions of how crop demands and crop market prices will change under a lternative policy scenarios. An inference engine (IE) including land use choice model is developed to illustrate land use choice behavior based on logit models , which allows to analyze how diversified factors ranging from climate changes, crop price changes to land management changes can affect the distribution of agr icultural land use. A test for integrated simulation is taken in each 0.1° by 0.1° grid cell to predict the change of agricultural land use types at globa l level. Global land use changes are simulated from 1992 to 2050.

关键词： EPIC land use decision support system international trade model logitmodel

Interaction Dynamics in AEC Global Teamwork

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Tsinghua Science and Technology 2008年第S1期13卷 145-150页

作者： Renate Fruchter Shubashri Swaminathan Naohiro matsumura Yukio Ohsawa Department of Civil and Environmental Engineering Stanford University Graduate School of Economics Osaka University Faculty of Engineering The University of Tokyo

Architecture, engineering, and construction (AEC) global project teamwork is communication intensive and relies heavily on synchronous and asynchronous information and collaboration technologies (ICT). We explore in this paper how an asynchronous ICT, called ThinkTank, reshaped the work practice of design-construction global teams, and how the interaction with this ICT reshaped the purpose and benefits of its use. ThinkTank is a web-based asynchronous collaboration and discussion forum. We introduce the influence diffusion model (IDM) that formalizes the process of identifying the influence of people, messages, and terms mathematically. Discovering who the influence leaders in project teams are can be beneficial and critical from a corporate management perspective, since they can guide or motivate the team towards successful actions and outcomes. We present the ThinkTank-IDM integrated system and its validation with a testbed of 53 AEC global team project archived in ThinkTank over 8 years.

关键词： global teamwork asynchronous collaboration technology interaction dynamics influence leader influence topic

Load Sharing Behavior of Star Gearing Reducer for Geared Turbofan Engine

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Chinese Journal of Mechanical Engineering 2017年第4期30卷 796-803页

作者： Shuai MO Yidu ZHANG Qiong WU Feiming WANG Shigeki matsumura Haruo HOUJOH State Key Laboratory of Virtual Reality Technology and Systems Beihang University Beijing 100191 China School of Mechanical Engineering & Automation Beihang University Beijing 100191 China AVIC Shenyang Engine Design & Research Institute Shenyang 100015 China Precision and Intelligence Laboratory Tokyo Institute of Technology Yokohama 226-8503 Japan

Load sharing behavior is very important for power-split gearing system, star gearing reducer as a new type and special transmission system can be used in many industry fields. However, there is few literature regarding the key multiple-split load sharing issue in main gearbox used in new type geared turbofan engine. Further mechanism anal- ysis are made on load sharing behavior among star gears of star gearing reducer for geared turbofan engine. Compre- hensive meshing error analysis are conducted on eccentricity error, gear thickness error, base pitch error, assembly error, and bearing error of star gearing reducer respectively. Floating meshing error resulting from meshing clearance variation caused by the simultaneous floating of sun gear and annular gear are taken into account. A refined mathematical model for load sharing coefficient calculation is established in consideration of different meshing stiffness and support- ing stiffness for components. The regular curves of load sharing coefficient under the influence of interactions, single action and single variation of various component errors are obtained. The accurate sensitivity of load sharing coefficienttoward different errors is mastered. The load sharing coef- ficient of star gearing reducer is 1.033 and the maximum meshing force in gear tooth is about 3010 N. This paper provides scientific theory evidences for optimal parameter design and proper tolerance distribution in advanced devel- opment and manufacturing process, so as to achieve optimal effects in economy and technology.

关键词： Geared turbofan engine GTF engineAero-turbofan engine Star gearing reducer Load sharing behavior

Diabetic neuropathy research: from mouse models to targets for treatment

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Neural Regeneration Research 2019年第11期14卷 1870-1879页

作者： Vuong M. Pham Shinji matsumura Tayo Katano Nobuo Funatsu Seiji Ito Department of Medical Chemistry Kansai Medical UniversityHirakataOsakaJapan Singapore Institute for Neurotechnology (SINAPSE) National University of SingaporeSingapore Department of Anesthesiology Osaka Medical CollegeTakatsukiOsakaJapan

Diabetic neuropathy is one of the most serious complications of diabetes, and its increase shows no sign of stopping. Furthermore, current clinical treatments do not yet approach the best effectiveness. Thus, the development of better strategies for treating diabetic neuropathy is an urgent matter. In this review, we first discuss the advantages and disadvantages of some major mouse models of diabetic neuropathy and then address the targets for mechanism-based treatment that have been studied. We also introduce our studies on each part. Using stem cells as a source of neurotrophic factors to target extrinsic factors of diabetic neuropathy, we found that they present a promising treatment.

关键词： brain derived neurotrophic factor diabetes extrinsic factors nerve growth factor nerve regeneration neurotrophic factors non-obese type 2 diabetes phosphatase and tensin homolog stem cell streptozotocin

Detailed analysis of PCBs and PCDD/Fs impurities in a dielectric oil sample （ASKAREL Nr 1740） from an imported transformer in China

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Frontiers of Environmental Science & Engineering 2014年第2期8卷 195-204页

作者： Jun HUANG Yamei HUI Toru matsumura Gang YU Shubo DENG Makoto YAMAUCHI Changmin WU Norimasa YAMAZAKI School of Environment POPs Research Center Tsinghua University Beijing 100084 China IDEA Consultants Inc. Shizuoka 421-0212 Japan CSD IDEA (Beijing) Institute of Environmental Innovation Co. Lt~ Beijing 100084 China

Homolog and congener profiles of polychlori- nated biphenyls （PCBs）, polychlorinated dibenzo-p- dioxins （PCDDs） and polychlorinated dibenzofurans （PCDFs） in commercial PCBs formulations are useful information for the source appointment of PCBs contam- ination as well as the risk assessment caused by potential exposure. Dielectric oil （ASKAREL Nr 1740） in an imported transformer found in China was sampled and analyzed by isotope dilution technology using high resolution gas chromatography-high resolution mass spectrometry （HRGC/HRMS）. The detailed homolog and congener profiles of PCBs obtained were compared with those of known Aroclor formulations. High similarity in the homolog profile between the oil sample and Aroclor 1260was found, with the hexachlorinated and hepta- chlorinated biphenyls accounting for more than 80.2% of the total PCBs concentration. Severn indicator PCBs contribute about 30%, while 12 PCB congeners （i.e., # 153, #143, #168, #180, #149, #165, #138, #170, #190, #187, #174, #181） account for more than 50% of the total PCB concentrations. Total concentration ofPCDDs, PCDFs and dioxin-like PCBs （DL-PCBs） was found to be 740 ng TEQ/g, of which 620 ng TEQ/g came from DL-PCBs. The contribution of PCDDs to the total TEQ was neglectable. The concentration of PCDFs homologs follows the order of OCDF 〉 HxCDFs 〉 HpCDFs 〉 PeCDFs 〉 TeCDFs, which is in consistence with the previous study on Aroclor 1260. Three DL-PCBs congeners （i.e., #118, #156, #157） accounted for 77% of the total concentration of DL-PCBs, also they contribute 72% in the TEQ caused by DL-PCBs.

关键词： profiles of polychlorinated biphenyls (PCBs),polychlorinated dibenzo-p-dioxins (PCDDs) polychlori-nated dibenzofurans (PCDFs) Askarel transformer insulat-ing fluid

Bacterial Cells as Model Factories

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American Journal of Operations Research 2013年第1期3卷 81-86页

作者： Ichiro matsumura Department of Biochemistry Center for Fundamental and Applied Molecular Evolution Emory University Atlanta USA

Bacteria, like industrial engineers, must manage processes that convert low value inputs into high value outputs. Bacteria are not intelligent, so they utilize self-organizing production systems to accelerate life-sustaining chemical processes. Here I explore two questions. First, can businesses apply the principles of self-organization? Second, can operations researchers contribute to our understanding of biological systems? I explain biochemical concepts in plain terms, illustrated with a few informative laboratory evolution experiments, and describe the organizing principles that underlie complex biological systems. I describe the new disciplines of synthetic biology and metabolic engineering, which offer opportunities for interdisciplinary collaboration between life scientists and operations researchers.

关键词： Complex Systems Control Theory Synthetic Biology Metabolic Engineering

Comparison of corneal biomechanical properties in normal tension glaucoma patients with different visual field progression speed

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International Journal of Ophthalmology(English edition) 2016年第7期9卷 973-978页

作者： Ying Hong Nobuyuki Shoji Tetsuya Morita Kazunori Hirasawa Kazuhiro matsumura Masayuki Kasahara Kimiya Shimizu Department of Ophthalmology Peking University Third Hospital Key Laboratory of Vision Loss and RestorationMinistry of Education Beijing 100191 China Department of Rehabilitation Orthoptics and Visual Science Course Kitasato University School of Allied Health Sciences Sagamihara City 252-0373 Japan Department of Ophthalmology Kitasato University Hospital Sagamihara City 252-0373 Japan Kitasato University Sagamihara City 252-0373 Japan

AIM：To compare the corneal biomechanical properties difference by ocular response analyzer（ORA） in normal tension glaucoma（NTG） patients with different visual field（VF） progression speed. METHODS：NTG patients with well-controlled Goldmann applanation tonometer（GAT） who routinely consulted Kitasato University Hospital Glaucoma Department between January 2010 and February 2014 were *** and ORA parameters including corneal compensated intraocular pressure（lOPcc）,Goldmann estimated intraocular pressure（lOPg）,corneal hysteresis（CH）,corneal resistance factor（CRF） were *** was tested by Swedish interactive threshold algorithm（SITA）-standard 30-2 *** patients underwent VF measurement regularly and GAT did not exceed 15 mm Hg at any time during the 3y follow *** were divided into four groups according to VF change over 3y,and ORA findings were compared between the upper 25th percentile group（slow progression group） and the lower 25th percentile group（rapid progression group）.RESULTS：Eighty-two eyes of 56 patients were *** were 21 eyes（21 patients） each in rapid and slow progression groups ***,lOPcc,lOPg,CH,CRF were 12.1＋1.4 mm Hg,15.8±1.8 mm Hg,12.8±2.0 mm Hg,8.4±1.1 mm Hg,7.9±1.3 mm Hg respectively in rapid progression group and 11.5±1.3 mm Hg,13.5±2.1 mm Hg,11.2±1.6 mm Hg,9.3±1.1 mm Hg,8.2±0.9 mm Hg respectively in slow progression group（P=0.214,〈0.001,0.007,0.017,0.413,respectively）.In bivariate correlation analysis,lOPcc,lOPcc-GAT and CH were significant correlated with m△MD（r =-0.292,-0.312,0.228 respectively,P =0.008,0.004,0.039 respectively）.CONCLUSION：Relatively rapid VF progression occurred in NTG patients whose lOPcc are rather high,CH are rather low and the difference between lOPcc and GAT are relatively *** lOPcc and lower CH are associated with VF progression in NTG *** study suggests that GAT measures might underestimate the IOP in such patients.

关键词： ocular response analyzer intraocular pressure corneal biochemical properties visual field normal tension glaucoma