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Influences of Casting Pressure Conditions on the Quality and Properties of a Magnesium Cylinder Head Cover Die Casting

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Journal of Materials Science & Technology 2005年第2期21卷 170-174页

作者： WenhuiLIU YangaiLIU ShoumeiXIONG BaichengLIU Y.matsumoto M.Murakami DepartmentofMechanicalEngineering TsinghuaUniversityBeijing100084China ToyoMachinery&MetalCo. Ltd.Japan

Casting pressure conditions have great influences on the casting defects, such as gas porosity, shrinkage porosity and gas holes. A Mg cylinder head cover die casting was used to experimentally study the influences of casting pressure, the loading time and the piston position of pressure intensification on the variation of pressure and the quality of casting. The results show that casting pressure, the loading time and the piston position of pressure intensification have great influences on the pressure variations in the mold, the quality and performance of casting. The external quality, the density and the tensile strength of casting were improved with the increase of casting pressure and the piston position of pressure intensification and the decrease of the loading time of pressure intensification.

关键词： Magnesium alloy Pressure Die casting Quality Properties

Pouchitis and pre-pouch ileitis developed after restorative proctocolectomy for ulcerative colitis:A case report

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World Journal of Gastroenterology 2007年第4期13卷 643-646页

作者： Takashi Iwata Takayuki Yamamoto Satoru Umegae Koichi matsumoto Inflammatory Bowel Disease Center and Department of Surgery Yokkaichi Social Insurance Hospital 10-8 Hazuyamacho Yokkaichi Mie 510-0016 Japan

We report a case of pouchitis and pre-pouch ileitis, and inflammation in the neo-terminal ileum proximal to the pouch, developed after restorative proctocolectomy for ulcerative colitis. A 35-year old female presented with fever and abdominal pain five weeks after ileostomy closure following proctocolectomy. Computed tomography showed collection of feces in the pouch and proximal ileum. A drainage tube was placed in the pouch perianally, and purulent feces were discharged. With antibiotic treatment, her symptoms disappeared, but two weeks later, she repeatedly developed fever and abdominal pain along with anal bleeding. Pouchscopy showed mucosal inflammation in both the pouch and the pre-pouch ileum. The mucosal cytokine production was elevated in the pouch and pre-pouch ileum. With antibiotic and corticosteroid therapy, her symptoms were improved along with improvement of endoscopic inflammation and decrease of mucosal cytokine production. The fecal stasis with bacterial overgrowth is the major pathogenesis of pouchitis and pre-pouch ileitis in our case.

关键词： Mucosal cytokines Pouchitis Pre-pouchileitis Restorative proctocolectomy Ulcerative colitis

Design and Development of Oblique-Incident Interferometer for Form Measurement of Hand-Scraped Surfaces

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Nanomanufacturing and Metrology 2021年第2期4卷 69-76页

作者： So Ito Daiki Kameoka Kimihisa matsumoto Kazuhide Kamiya Department of Intelligent Robotics Faculty of EngineeringToyama Prefectural University5180KurokawaImizuToyama939-0398Japan

Precision flat surfaces finished by hand-scraping are extensively used in the sliding parts of precision positioning systems or the surface plates of precision measuring *** hand-scraped surfaces are employed to improve the flatness of the machined surfaces and the motion accuracy of the *** numerous depressions of micrometer-scale depth on a scraped surface are thought to prevent wringing and improve the lubrication properties by forming oil *** measurement of the micrometer-scale features of a hand-scraped surface is one of the reasonable methods for investigating its effect on the motion accuracy of the positioning systems or the lubrication properties of the sliding *** a hand-scraped surface is a rough surface composed of micrometric complex features,it is difficult to conduct precision measurement of the three-dimensional surface form using conventional measurement instruments,such as vertical-incident interferometers or stylus-type *** this study,an oblique-incident interferometer based on Abramson interferometry is introduced to measure the form of a rough surface produced by *** this technique can detect high-intensity reflected light on a rough surface,it allows the measurement of the form of the hand-scraped surface in noncontact *** order to shorten the measurement time,the form calculation based on a five-step phase shifting method was introduced.

关键词： Oblique-incident interferometer Abramson interferometry Hand-scraped surface Rough surface Surface form measurement

Structural Analysis of Layered Polymer Crystals and Application to Photofunctional Materials Using Organic Intercalation

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复旦学报(自然科学版) 2005年第5期 303-304页

作者： Shinya Oshita,Akikazu matsumoto Department of Applied Chemistry Graduate School of Engineering Osaka City University Sugimoto Sumiyoshi-ku Osaka 558-8585 Japan Department of Applied Chemistry Graduate School of Engineering Osaka City University Sugimoto Sumiyoshi-ku Osaka 558-8585 Japan

Structural Analysis of Layered Polymer Crystals and Application to Photofunctional Materials Using Organic Intercalation

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复旦学报（自然科学版） 2005年第5期44卷 913-914页

作者： Shinya Oshita Akikazu matsumoto Department of Applied Chemistry Graduate School of Engineering Osaka City University Sugimoto Sumiyoshi-ku Osaka 558-8585 JapanDepartment of Applied Chemistry Graduate School of Engineering Osaka City University Sugimoto Sumiyoshi-ku Osaka 558-8585 Japan

We reported that layered polymer crystals are obtained by the topochemical polymerization of 1,3-diene monomers and provided as host material for organic intercalation[1]. For intercalation using various long-alkyl amines as the guest species, its reaction behavior, mechanism, characteristics, and potential to application have been clarified[2]. We also succeeded in the synthesis of several host layered polymer crystals with different tacticities and layer structures[3]. We describe here intercalation using various stereoregular poly(muconic acid)s (PMA) and n-alkylamines as the host and guest compounds, respectively. The reaction behavior and the layered structure of the obtained ammonium polymers are discussed from the viewpoint of stereochemical structure of the host polymers.

关键词：分层聚合物结构分析晶体光化学插层反应

Population structures and spatial patterns of two unpalatable Arisaema species(Araceae) with and without clonal reproduction in a riparian forest intensively grazed by Sika deer

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Journal of Forestry Research 2020年第1期31卷 155-162页

作者： Tetsuya K.matsumoto Muneto Hirob Yasuaki Akaji Yuko Miyazaki Graduate School of Environmental and Life Science Okayama UniversityTsushima-Naka 1-1-1Kita-kuOkayama 700-8530Japan Present Address:Center for Environmental Biology and Ecosystem Studies National Institute for Environmental StudiesOnogawa 16-2Tsukuba 305-8506Japan

General decline of understory cover can result from increased abundance of and foraging pressure by *** population size and degree of aggregation can increase for unpalatable understory plants that escape foraging *** reproduction can enable unpalatable plant species to increase their population sizes while trending toward spatially aggregated ***,the details of the relationship between clonal reproduction in unpalatable plants and their dynamics under intensive deer herbivory are not *** compared the population structures and spatial patterns of two coexisting unpalatable plant species,Arisaema ovale(with clonal reproduction)and ***(without clonal reproduction)in a riparian forest intensively grazed by Sika deer,and examined the null hypothesis that the extent of spatial aggregation and local population size would not differ between the clonal and non-clonal Arisaema *** a 0.36-ha plot,*** had a larger population size(1087 individuals)with a higher abundance ratio of small plants(p<0.01)than ***(84 individuals).Analyses of spatial point processes showed that both populations were spatially aggregated(p<0.05).The spatial aggregation of ***,however,became weaker than that of ***,when we excluded one dense patch originating from irregular seed *** results,excluding the aggregated distribution observed in ***,suggested a substantial contribution of clonal reproduction to the expansion of the local *** population following intensive grazing by Sika deer.

关键词： Arisaema ovale Arisaema peninsulae Deer herbivory Spatial pattern Unpalatable plant

Optimum Position of Polarizer-Based Compensator for Enhanced Tolerance to Polarization Mode Dispersion

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光学学报 2003年第S1期23卷 583-584页

作者： Daniele Alzetta Masayuki matsumoto Department of Communications Engineering Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 JapanDepartment of Communications Engineering Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan

We show through numerical simulation that the performance of two types of polarization-mode dispersion polarizer-based compensation techniques may be improved by optimizing the position of the compensator along the tr... 详细信息

关键词： for as it PMDC of line that

Preconcentration of trace elements by adsorption onto a niobium wire for electrothermal atomization atomic absorption spectrometry with a tungsten tube atomizer

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Frontiers of Chemical Science and Engineering 2012年第4期6卷 432-435页

作者： Satoshi KANECO Hiroaki KITANAGA hideyuki KATSUMAT Tohru SUZUKIt Department of Chemistry for Materials Graduate School of Engineering Mie University Mie 514-8507 Japan Environmental Preservation Center Mie University Mie 514-8507 Japan

In the present method of trace elements wire has been developed work, a new preconcentration by adsorption onto a niobium for electrothermal atomization atomic absorption spectrometry （ETAAS） with a tungsten tube atomizer. Detection limits （pg. mL-1） by this method combined with ETAAS were 45 for bismuth, 7.0 for cadmium, 20 for copper, 1.3 for gold, 36 for lead, 65 for manganese, 9.5 for rhodium and 19 for silver.

关键词： preconcentration adsorption onto niobiumwire electrothermal atomization atomic absorption spectro-metry tungsten tube atomizer trace elements

Development of a roll-to-roll high-speed laser micro processing machine for preparing through-holed anodes and cathodes of lithium-ion batteries

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International Journal of Extreme Manufacturing 2023年第3期5卷 534-546页

作者： Mitsuru Yamada Naohiko Soma Masaya Tsuta Susumu Nakamura Nobuo Ando Futoshi matsumoto Department of Materials and Life Chemistry Kanagawa University3-27-1RokkakubashiKanagawa-kuYokohamaKanagawa221-8686Japan Wired Co. Ltd2-4-15kitashinboSanjoNiigata955-0861Japan Department of Electrical and Electronic Systems Engineering National Institute of TechnologyNagaoka College888NishikatakaiNagaokaNiigata940-8532Japan Research Institute for Engineering Kanagawa University3-27-1RokkakubashiKanagawa-kuYokohamaKanagawa221-8686Japan

Aiming to improve the battery performance of lithium-ion batteries(LIBs),modification of the cathodes and anodes of LIBs using laser beams to prepare through-holes,non-through-holes or ditches arranged in grid and line patterns has been proposed by many researchers and *** this study,a laser processing system attached to rollers,which realizes this modification without large changes in the present mass-production system,was *** laser system apparatus comprises roll-to-roll equipment and laser *** roll-to-roll equipment mainly consists of a hollow cylinder with openings on its circumferential *** and anode electrodes for LIBs are wound around the cylinder in the longitudinal direction of the electrodes.A pulsed beam reflected from the central axis of the cylinder can continuously open a large number of through-holes in the thin ***-holes were formed at a rate of 100000 holes per second on lithium iron phosphate cathodes and graphite anodes with this *** through-holed cathodes and anodes prepared with this system exhibited higher C-rate performance than nontreated cathodes and anodes.

关键词： lithium-ionbatteries laser processingsystem roll-to-roll system through-holing structure high-rate performance