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Journal of Thermal Science 2017年第2期26卷 107-112页

作者： Kaname Tsukamoto mizuki Okada Yuzo Inokuchi Nobuhiko Yamasaki Akihiro Yamagata Kyushu University Motooka 744819-0395FukuokaJapan IHI Corporation Shin-Nakahara 1235-8501YokohamaJapan

For centrifugal compressors used in automotive turbochargers, the extension of the surge margin is demanded because of lower engine speed. In order to estimate the surge line exactly, it is required to acquire the compressor characteristics at small or negative flow rate. In this paper, measurement and numerical simulation of the characteristics at small or negative flow rate are carried out. In the measurement, an experimental facility with a valve immediately downstream of the compressor is used to suppress the surge. In the numerical work, a new boundary condition that specifies mass flow rate at the outlet boundary is used to simulate the characteristics around the zero flow rate region. Furthermore, flow field analyses at small or negative flow rate are performed with the numerical results. The separated and re-circulated flow fields are investigated by visualization to identify the origin of losses.

关键词： centrifugal compressor turbocharger measurement CFD RANS surge small flow negative flow

Magnetic Behavior of Some Rare-Earth Transition-Metal Perovskite Oxide Systems

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Journal of Rare Earths 2004年第6期22卷 733-738页

作者： Kenji Yoshii Akio Nakamura Masaichiro Mizumaki Naoshi Ikeda Jun'ichiro mizuki Japan Atomic Energy Research Institute Mikazuki Hyogo 679-5148 JapanJapan Atomic Energy Research Institute Tokai-mura Ibaraki 305-1195 JapanJapan Synchrotron Radiation Research Institute Mikazuki Hyogo 679-5198 JapanJapan Synchrotron Radiation Research Institute Mikazuki Hyogo 679-5198 JapanJapan Atomic Energy Research Institute Mikazuki Hyogo 679-5148 Japan

Magnetic properties were investigated for the rare-earth 3d-transition metal oxides with the perovskite structure. Intriguing magnetic phenomena were reviewed for a few systems:magnetization peak effect in the titanates, magnetization reversal in the chromites and metallic ferromagnetism in the cobaltites. The results suggest an important role of the rare-earth ions for the magnetic properties of such complex oxides.

关键词： perovskite oxide magnetic properties rare earth transition metal

Microarray and Proteomic Analysis of Brassinosteroid-and Gibberellin-Regulated Gene and Protein Expression in Rice

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Genomics, Proteomics & Bioinformatics 2004年第2期2卷 77-83页

作者： Setsuko komatsu Department of Molecular Genetics National Institute of Agrobiological Sciences Tsukuba 305-8602 Japan.

Brassinosteroid (BR) and gibberellin (GA) are two groups of plant growthregulators essential for normal plant growth and development. To gain insight into the molecularmechanism by which BR and GA regulate the growth and development of plants, especially the monocotplant rice, it is necessary to identify and analyze more genes and proteins that are regulated bythem. With the availability of draft sequences of two major types, japonica and indica rice, it hasbecome possible to analyze expression changes of genes and proteins at genome scale. In this review,we summarize rice functional genomic research by using microarray and proteomic approaches and ourrecent research results focusing on the comparison of cDNA microarray and proteomic analyses of BR-and GA-regulated gene and protein expression in rice. We believe our findings have importantimplications for understanding the mechanism by which BR and GA regulate the growth and developmentof rice.

关键词： brassinosteroid gibberellin microarray proteome rice

Numerical Simulation of Residual Circulation due to Bottom Roughness Variability Under Tidal Flows in A Semi-Enclosed Bay

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China Ocean Engineering 2005年第4期19卷 601-612页

作者：槐文信 T.komatsu 曾小辉 State Key Laboratory of Water Resources and Hydropower EngineeringScience Wuhan University Wuhan430072 China Department of Urban and Environmental Engineering Kyushu University Fukuoka812-8581 Japan

Nowadays there are some chronic serious environmental problems, such as eutrophication, blue tide and so on, in a complicated coastal zone or a semi-enclosed bay, because the water exchanges between an inner bay and an outer sea is weak compared with the supply of contaminant. Under this situation, a method to improve the water quality by 3-dimensional small unsymmetrical structures has been proposed by komatsu et al. In this paper, several numerical simulations of the tidal current and concentration for various arrangements of bottom roughness in a semi-enclosed model bay are carfled out with a depth-averaged 2-D numerical model. The model is solved by the hybrid finite analytic method with nonstaggered grid. And the SIMPLES algorithm with Rhie and Chow＇ s momentum interpolation technique is used for the simulation. The effect of komatsu＇ s method for water purification is examined by numerical simulation. The result of numerical experiment indicates that it is possible to generate a new tidal residual current and to activate a tidal exchange by bottom roughness arrangement only.

关键词： semi-enclosed bay bottom roughness hybrid finite analytic method water purification depth-averaged 2 D model

Synthesis of Nitrogen-doped Titania by Solvothermal Reactions in Alcohols

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过程工程学报 2006年第3期6卷 472-476页

作者： Tsugio Sato Yohei Aida Masakazu komatsu 殷澍 Institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendai 980-8577Japan

Nitrogen-doped titania nanoparticles were obtained by the homogeneous precipitation in hexamethylenetetraminetitanium trichloride-alcohol aqueous solutions at 90 ℃ followed by heating at 190 ℃. Anatase, rutile and brookite were obtained, where the crystallite size, specific surface area and color greatly changed as 5～50 nm, 20～200 m2/g and light gray to yellow, depending on the solvent and pH. The products after calcination were yellow, indicating doping with nitrogen ion. All colored titania showed photocatalytic activity under visible light irradiation for the oxidative decomposition of nitrogen monoxide in air. Especially, the nanoparticles of anatase type nitrogen-doped titania obtained using methanol aqueous solution showed excellent photocatalytic activity.

关键词： nitrogen-doped titania solvothermal synthesis alcohol photocatalysis nitrogen monoxide decomposition

HYBRID FINITE ANALYTIC SOLUTION FOR THREE-DIMENSIONAL TIDAL FLOW WITH SIGMA COORDINATE SYSTEM

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Journal of Hydrodynamics 2000年第2期12卷 54-61页

作者： Huai, Wenxin Toshimitsu, komatsu Li, Wei Wuhan Univ of Hydraulic and Electric Engineering Wuhan China

A three-dimensional numerical model was developed to predict the behavior of tidal flow by using the σ-coordinate transformation. Conservation equations were solved by hybrid finite analytical techniques. The hydrodynamic model was verified with the analytical solutions for the tidal forcing in an open channel. The simulation results are in good agreement with the analytical solutions.

关键词： Computer simulation Hydrodynamics Mathematical transformations Models Numerical methods Three dimensional

Potato Responds to Salt Stress by Increased Activity of Antioxidant Enzymes

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Journal of Integrative Plant Biology 2009年第12期51卷 1095-1103页

作者： Keyvan Aghaei Ali Akber Ehsanpour Setsuko komatsu National Institute of Crop Science Tsukuba 305-8518 Japan Department of Biology Faculty of Sciences University of Isfahan Isfahan *** Iran

To understand the response of potato to salt stress, antioxidant enzyme activities and ion content were analyzed for a sensitive and a tolerant cultivar. Nodal cuttings of the tolerant cultivar, Kennebec, and the sensitive cultivar, Concord, were exposed to media without or with 30, 60, 90 or 120 mmol/L NaCI for 4 weeks. On exposure to NaCI, the length and fresh and dry weight of both shoots and roots of Concord showed greater decrease than those of Kennebec. The decrease in shoot growth was more severe than that of the root for both cultivars. The K^＋ content of shoots and roots of both cultivars was reduced in a dose-dependent manner by exposure to NaCl; the Na^＋ content increased. Activities of ascorbate peroxidase, catalase and glutathione reductase were increased in NaCl-exposed shoots of Kennebec; the corresponding activities in NaCI-exposed shoots of Concord were decreased. Roots of both cultivars showed similar changes in the activities of these enzymes on exposure to NaCI. These studies established that enzyme activities in Concord shoots are inversely related to the NaCI concentration, whereas those in Kennebec do not show a dose dependency, which is also the case for the roots of both cultivars. Our findings suggest that an increase in activity of antioxidant enzymes, such as ascorbate peroxidase, catalase and glutathione reductase, can contribute to salt tolerance in Kennebec, a salt resistant cultivar of potato.

关键词： antioxidant enzyme ion content potato salt resistant cultivar salt stress.

Functional Characterization of Gibberellin-Regulated Genes in Rice Using Microarray System

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Genomics, Proteomics & Bioinformatics 2006年第3期4卷 137-144页

作者： Asad Jan Setsuko komatsu National Institute of Agrobiological Sciences Tsukuba 305-8602 Japan National Institute of Agrobiological Sciences Tsukuba 305-8602 Japan National Institute of Crop Science Tsukuba 305-8518 Japan.

Gibberellin （GA） is collectively referred to a group of diterpenoid acids, some of which act as plant hormones and are essential for normal plant growth and development. DNA microarray technology has become the standard tool for the parallel quantification of large numbers of messenger RNA transcripts. The power of this approach has been demonstrated in dissecting plant physiology and development, and in unraveling the underlying cellular signaling pathways. To understand the molecular mechanism by which GA regulates the growth and development of plants, with reference to the monocot model plant-rice, it is essential to identify and analyze more genes and their products at the transcription and translation levels that are regulated by GA. With the availability of draft sequences of two major rice types, indica and japonica rice, it has become possible to analyze global expression profiles of genes on a genome scale. In this review, the progress made in finding new genes in rice leaf sheath using microarray system and their characterization is discussed. It is believed that the findings made in this regard have important implications for understanding the mechanism by which GA regulates the growth and development of rice.

关键词： gibberellin gene expression microarray rice

AN EXPERIMENTAL METHOD OF MEASURING THE CRYSTALLIZATION FRONT TEMPERATURE

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Chinese Physics Letters 1984年第2期1卷 53-56页

作者： JIN Wei-qing Hiroshi komatsu Shanghai Institute of Ceramics Academia Sinica The Research Institute for Iron Steel and Other MetalsTohoku UniversityJapan

By measuring the temperature of the crystallization front of salol by means of in situ observations on a thermally regulating stage, we have obtained the linear form of (TS/L-TM.B),i.e., the difference between the tem... 详细信息

关键词： crystallization interface solidified

P-Frobenius问题与p-对称数值半群

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浙江理工大学学报（自然科学版） 2024年第2期51卷 265-270页

作者：应皓天小松尚夫浙江理工大学理学院杭州310018

针对p-Frobenius问题中出现的非对称性问题,利用数值半群理论以及Apery集等工具研究了p-Frobenius问题对应的p-对称数值半群。首先利用数值半群和Apery集等工具对p-Frobenius问题进行预处理,得到了对应数值半群和Apery集的各个变量;并... 详细信息

针对p-Frobenius问题中出现的非对称性问题,利用数值半群理论以及Apery集等工具研究了p-Frobenius问题对应的p-对称数值半群。首先利用数值半群和Apery集等工具对p-Frobenius问题进行预处理,得到了对应数值半群和Apery集的各个变量;并将这些变量与对称数值半群和Frobenius问题进行对比,由此定义了p-对称数值半群,并给出了p-对称性的刻画。在此基础上,首先给出了两大类p-对称数值半群,其次研究了对称数值半群与p-对称数值半群的p化关联性。这两类p-对称数值半群给出了大量具体实例,而p化关联性则可用于处理p-Frobenius问题中出现的非对称问题。

关键词：数值半群线性丢番图方程 Apery集对称性 Frobenius问题