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GAUSSIAN BRACKETS METHODS

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光电子·激光 1989年第2期 74-76页

作者： kazuo TANAKA RD Headquaners CANON Inc.

It is reviewed the use of Gaussian brackets in the analysis on Gaussian beam transformation by an optical system.4 The definition of the Gaussian brackets are given together with generalized Gaussian *** of Gaussian b... 详细信息

关键词： GAUSSIAN BRACKETS METHODS

Examining the properties and therapeutic potential of glial restricted precursors in spinal cord injury

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Neural Regeneration Research 2016年第4期11卷 529-533页

作者： kazuo Hayakawa Christopher Haas Itzhak Fischer Department of Neurobiology and Anatomy Drexel University College of Medicine Department of Orthopaedic Surgery Graduate School of Medical SciencesNagoya City University

In the aftermath of spinal cord injury,glial restricted precursors（GRPs） and immature astrocytes offer the potential to modulate the inflammatory environment of the injured spinal cord and promote host axon *** clinical application of cellular therapy for the repair of spinal cord injury requires strict quality-assured protocols for large-scale production and preservation that necessitates long-term in vitro ***,such processes have the potential to alter the phenotypic and functional properties and thus therapeutic potential of these ***,clinical use of cellular therapies may be limited by the inflammatory microenvironment of the injured spinal cord,altering the phenotypic and functional properties of grafted *** report simulates the process of large-scale GRP production and demonstrates the permissive properties of GRP following long-term in vitro ***,we defined the phenotypic and functional properties of GRP in the presence of inflammatory factors,and call attention to the importance of the microenvironment of grafted cells,underscoring the importance of modulating the environment of the injured spinal cord.

关键词： glial restricted precursor spinal cord injury astrocytes axon regeneration inflammatory factors long-term culture

A unified model with a generalized gauge symmetry and its cosmological implications

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Chinese Physics C 2015年第10期39卷 68-76页

作者： Jong-Ping Hsu kazuo O.Cottrell Department of Physics University of Massachusetts Dartmouth

A unified model is based on a generalized gauge symmetry with groups [Sg3c]color×（SU2×U1）X[U1b×U11]. It implies that all interactions should preserve conservation laws of baryon number, lepton number, and electric charge, etc. The baryonie U1b, leptonie U11 and color SU3o gauge transformations are generalized to involve nonintegrable phase factors. One has gauge invariant fourth-order equations for massless gauge fields, which leads to linear potentials in the [U1b × U11] and color [SUao] sectors. We discuss possible cosmological implications of the new baryonie gauge field. It can produce a very small constant repulsive force between two baryon galaxies （or between two anti-baryon galaxies）, where the baryon force can overcome the gravitational force at very large distances and leads to an accelerated cosmic expansion. Based on conservation laws in the unified model, we discuss a simple rotating dumbbell universe with equal amounts of matter and anti-matter, which may be pictured as two gigantic rotating clusters of galaxies. Within the gigantic baryonie cluster, a galaxy will have an approximately linearly accelerated expansion due to the effective force of constant density of all baryonie matter. The same expansion happens in the gigantic anti-baryonic cluster. Physical implications of the generalized gauge symmetry on charmonium confining potentials due to new SUac field equations, frequency shift of distant supernovae Ia and their experimental tests are discussed.

关键词： unified model nonintegrable phase factors conservation laws cosmology accelerated expansion

Thermal Properties of Al-50%Si Alloys

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材料热处理学报 2004年第5期25卷 180-182页

作者： Akio Nishimoto Katsuya Akamatsu Kazuyoshi Nakao kazuo Ichii Department of Materials Science and Engineering Kansai University Osaka JapanDepartment of Materials Science and Engineering Kansai University Osaka JapanDepartment of Materials Science and Engineering Kansai University Osaka JapanDepartment of Materials Science and Engineering Kansai University Osaka Japan

In order to prepare a hypereutectic Al-Si alloy with low coefficients of thermal expansion (CTE), Al-50%Si alloy was produced by powder metallurgy (P/M) and ingot metallurgy (I/M). P/M specimen was prepared by mechanical alloying (MA) and pulsed electric-current sintering (PECS). The microstructures of specimens were characterized by optical microscopy and scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS). Vickers microhardness and CTE measurements were performed. The grains in the P/M specimen were refined with increasing MA time. Primary Si and eutectic Si in the I/M specimen were remarkably refined by adding minute amounts of Sr. The CTE of P/M and I/M specimens were estimated as ***"6 and 10.7xlO"6, respectively. These values were as same as a CTE of AlaOs ceramics.

关键词： Al-Si合金热膨胀系数焙烧浇铸锶增加

Unsupervised WSD by Finding the Predominant Sense Using Context as a Dynamic Thesaurus

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Journal of Computer Science & Technology 2010年第5期25卷 1030-1039页

作者： Javier Tejada-Carcamo Hiram Calvo Alexander Gelbukh kazuo Hara San Pablo Catholic University ArequipaPeru Center for Computing Research National Polytechnic InstituteMexico City07738Mexico Nara Institute of Science and Technology TakayamaIkomaNara 630-0192Japan

We present and analyze an unsupervised method for Word Sense Disambiguation（WSD）.Our work is based on the method presented by McCarthy et *** 2004 for finding the predominant sense of each word in the entire *** maximization algorithm allows weighted terms（similar words） from a distributional thesaurus to accumulate a score for each ambiguous word sense,i.e.,the sense with the highest score is chosen based on votes from a weighted list of terms related to the ambiguous *** list is obtained using the distributional similarity method proposed by Lin Dekang to obtain a *** the method of McCarthy et al.,every occurrence of the ambiguous word uses the same thesaurus,regardless of the context where the ambiguous word *** method accounts for the context of a word when determining the sense of an ambiguous word by building the list of distributed similar words based on the syntactic context of the ambiguous *** obtain a top precision of 77.54%of accuracy versus 67.10%of the original method tested on *** also analyze the effect of the number of weighted terms in the tasks of finding the Most Precuent Sense（MFS） and WSD,and experiment with several corpora for building the Word Space Model.

关键词： word sense disambiguation word space model semantic similarity text corpus thesaurus

Intraregional Agricultural Characteristics Critical in Explaining Farmland Abandonment:Evidence from Chugoku and Shikoku Region of Japan

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Chinese Geographical Science 2020年第6期30卷 1111-1128页

作者： SU Guandong TOMOZAWA kazuo OKAHASHI Hidenori CHEN Lin Department of Geography Graduate School of LettersHiroshima UniversityHigashihiroshima 7398522Japan Department of Geography Faculty of LettersNara UniversityNara 6318502Japan School of Geography South China Normal UniversityGuangzhou 510631China

Since the 1980 s,Japan has witnessed an unprecedented decline in agriculture chiefly due to farmers’aging,depopulation,and unfavorable socio-economic *** development has resulted in an increase of farmland abandonment(FLA)across the ***,it remains unclear as to how and to what extent FLA is influenced by intraregional agricultural *** such,this article discusses the issue of FLA by taking a closer look at the Chugoku and Shikoku region,as it has experienced the highest FLA rates in Japan in recent *** this analysis,a total of 25 indicators retrieved from the census of agriculture and forestry at the former municipalities scale were selected to describe intraregional agricultural *** employed principal component analysis(PCA)to evaluate agricultural characteristics,while multiple linear regressions(MLR)was applied to explore their correlations with FLA and spatial ***,there are strong intraregional differences in the agricultural characteristics across the Chugoku and Shikoku region,with eight different principle components(PCs)describing their ***,variables measuring agricultural characteristics explain nearly 52.8%of the variation in FLA in our *** sales orientation and scale of agriculture have the strongest negative correlation to FLA in the region,while the status of agricultural succession displays the strongest positive correlation to ***,in areas where agriculture is more stable and easier to maintain,FLA is more strongly influenced by changes in agricultural characteristics than by geographical *** argue that localized approaches and policies for future management need to take intraregional differences in agricultural characteristics and FLA into *** findings help to explain spatial variations in agricultural characteristics and FLA in regional contexts,suggesting the need for better-informed farmland use policies to mitigate further aba

关键词： intraregional agricultural characteristics farmland abandonment(FLA) Chugoku and Shikoku region,Japan

Natural Cone Formation for Fast Ignition of Laser Fusion

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Chinese Physics Letters 2008年第6期25卷 2151-2153页

作者：杨晓青雷安乐余玮 TANAKA kazuo Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 Institute of Laser Engineering and Graduate School of Engineering Osaka University Osaka 565-0871 dapan

We propose to utilize the leading pulse of a petawatt class laser to create a conic plasma channel in the dense plasmas. This plasma channel could serve as a natural cone to guide the main pulse to the cone tip, as behaves similarly to the physical Au cone. We estimate that the leading pulse of a petawatt laser could create a natural cone with cone tip only about 100 μm away from the edge of compressed core plasma. The natural cone formation should be compatible for a good uniform compression and efficient fast heating of the imploded fuel.

关键词： supernova explosion proto-neutron star shock wave

Large Scale Finite Element Modeling,Simulation and Visualization for Wind Flows in Urban Area Using Virtual Reality

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Tsinghua Science and Technology 2008年第S1期13卷 84-89页

作者： kazuo Kashiyama Tomosato Takada Hideo Miyachi Department of Civil Engineering Chuo University Visualization Development Division KGT Inc.

A large-scale finite element modeling, simulation and visualization for wind flows are presented. The modeling method using GIS/CAD data is employed. The stabilized parallel finite element method based on SUPG/PSPG method is employed for the analysis of wind flows. The present method is applied to the simulation of wind flow and contaminant spread in urban area. The visualization based on virtual reality is employed to evaluate the mesh quality and computational results. The computed results are qualitatively in agreement with the experimental results and actual phenomena. The present method is shown to be a useful tool to simulate the wind flows in urban area.

关键词： virtual reality CAD/GIS urban area wind flows

Atomic force microscopy imaging of dialyzed single-walled carbon nanotubes dispersed with sodium dodecyl sulfate

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International Journal of Smart and Nano Materials 2013年第2期4卷 119-127页

作者： Shigeyuki Hirayama Takuya Hayashida kazuo Umemura Biophysics Section Department of PhysicsFaculty of ScienceTokyo University of Science1-3 KagurazakaShinjukuTokyo 1628601Japan

The existence of excess sodium dodecyl sulfate(SDS)molecules in a single-walled carbon nanotube(SWNT)solution dispersed by hybridization with SDS leads to unstable atomic force microscopy(AFM)*** this study,we demonstrate sequential dialysis against pure water in order to remove excess SDS molecules from an SDS-SWNT hybrid dispersion.A 1:102 volume ratio of SDS-SWNT dispersion to water in the dialysis was found to be effective in realizing stable AFM observations of the SDS-SWNT hybrids despite imperfect filtering of SDS via *** the other hand,the SDS-SWNT hybrids were stable even when this volume ratio was 1:***,the SDS-SWNT hybrids were present in the solution even when the dialyzed samples were stored for 14 *** results reveal that dialysis under optimal conditions enables improved handling of SDS-SWNT hybrids,particularly for stable AFM observations.

关键词： carbon nanotube atomic force microscopy sodium dodecyl sulfate dialysis