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中国腐蚀与防护学报 2009年第4期29卷 319-320页

作者： t.maruyama K.AKIBA M.H.BIN ANI M.UEDA K.KAWAMURA Department of Metallurgy and Ceramics Sciences Graduate School of Science ande Engineering Tokyo Institute of Technology S8-112-12-1 O-okayamaMeguro-kuTokyo 152-8552 Japan

there are two kinetic regimes in high temperature oxidation of metals and *** is the parabolic kinetics in which the ionic diffusion through oxide scales is the rate-determining *** other is the linear kinetics in which rate determining process is the supply of oxidant through the gaseous boundary *** oxygen chemical potential is almost the same as that in the atmosphere in the former case,but in the later case,the oxygen chemical potential is much lower than that in the *** oxygen chemical potential at the surface of scale is a good measure of the protective character of the scale.

关键词：金属腐蚀氧化防护

稻田灌溉的特点和效率——论日本灌溉系统的发展与灌溉效率递减

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灌溉排水 1990年第1期9卷 54-57,53页

作者： t.Watanabe t.maruyama A.Yomota 赵育民

稻田灌溉和旱地灌溉相比较具有很多用水特点,本文结合日本的具体情况对这些特点和不同的效率进行讨论。很明显,从稻田渗透和地表排水方面来看,如按I.C.I.D.标准计算,稻田灌溉的效率是很低的,不能和旱地相比。在日本注意到一种有趣的趋势... 详细信息

稻田灌溉和旱地灌溉相比较具有很多用水特点,本文结合日本的具体情况对这些特点和不同的效率进行讨论。很明显,从稻田渗透和地表排水方面来看,如按I.C.I.D.标准计算,稻田灌溉的效率是很低的,不能和旱地相比。在日本注意到一种有趣的趋势,即灌溉的发展和农田的联并引起了灌溉效率的降低。

关键词：日本稻田灌溉系统灌溉效率

Oscillation frequency stabilization of a diode laser for the laser interferometer in a satellite-to-satellite tracking system

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Oscillation frequency stabilization of a diode laser for the...

从重油生产烯烃——用焦炭流化床法使重石油馏分热裂解以生产乙烯和丙烯

Photonics Asia 2004;Optics and Lasers

作者： S.Maehara H.Kobayashi t.Sato M.Ohkawa t.maruyama t.Yoshino H.Kunimori M.Hosokowa H.Ito Y.Li S.Nagano S.Kawamura C/O Sato Lab. Graduate School of Science and technology Niigata University Ikarashi 2-no-cho Niigata 950-2181 JAPAN C/O Sato Lab. Graduate School of Science and technology Niigata University Ikarashi 2-no-cho Niigata 950-2181 JAPAN Faculty of Engineering Niigata University Ikarashi 2-no-cho Niigata 950-2181 JAPAN Faculty of Engineering Niigata University Ikarashi 2-no-cho Niigata 950-2181 JAPAN Faculty of Engineering Niigata University Ikarashi 2-no-cho Niigata 950-2181 JAPAN National Institute of Information and Communications technology 4-2-1 Nukui-Kitamachi Koganei tokyo 184-8795 Japan National Institute of Information and Communications technology 4-2-1 Nukui-Kitamachi Koganei tokyo 184-8795 Japan National Institute of Information and Communications technology 4-2-1 Nukui-Kitamachi Koganei tokyo 184-8795 Japan National Institute of Information and Communications technology 4-2-1 Nukui-Kitamachi Koganei tokyo 184-8795 Japan National Institute of Information and Communications technology 4-2-1 Nukui-Kitamachi Koganei tokyo 184-8795 Japan National Institute of Information and Communications technology 4-2-1 Nukui-Kitamachi Koganei tokyo 184-8795 Japan National Astronomical Observatory 2-21-1 Osawa Mitaka tokyo 181-8588 Japan

Currently in the initial stages of development, the endeavor aims to use satellite-to-satellite tracking laser interferometer-based optical technique, to document fluctuations in earth’s gravitationa

关键词： Earth’s gravitational field, satellite, interferometer, diode laser, frequency stability, femtosecond optical comb generator, rubidium absorption line, optical feedback

来源： cnki会议评论

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化学工业与工程 1985年第3期 38-48页

作者： N.Fujita Y.Kumagai Y.Shoji H.Kubo t.maruyama 李长芮郭雨东重油生产石化产品研究开发协会北京师范学院化学系天津石油化工公司日本、东京

大约30年以来,乙烷、丙烷、丁烷和石脑油等轻烃一直是石油化学工业的重要原料,而且这种趋势还将继续存在。从长远来看,轻烃的需要将不断增长,而重油则会充斥市场。这将导致经济增长的下降和加重环境保护的负担以及能源的多样化经营。轻... 详细信息

大约30年以来,乙烷、丙烷、丁烷和石脑油等轻烃一直是石油化学工业的重要原料,而且这种趋势还将继续存在。从长远来看,轻烃的需要将不断增长,而重油则会充斥市场。这将导致经济增长的下降和加重环境保护的负担以及能源的多样化经营。轻烃的高价及其在供求方面不断扩大的差距,已引起人们对轻烃在生产石油化工产品的可用性,表示焦虑。因此,已考虑其它原料如原油或它的比较重的馏分作为烯烃生产的有前途的资源。利用比较重的油作为石油化学工业的原料生

关键词：重油残油石油燃料焦炭粒子石油馏分裂化反应器流化床法烯烃脂肪族不饱和烃热裂解

Relationship between Primary Crystal temperature and Carbon Equivalent in Cast Iron

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Journal of Materials Science & technology 2008年第3期24卷 325-326页

作者： t.Kanno t.Kikuchi K.Hayashi Y.maruyama Kimura Chuzosho Co.Ltd. 1157 Nagasawa Shimizu-choShizuoka-ken

CE （=%C＋（1/3）x（%Si）） does not suit experiment results in many cases. In this work, the effect of alloy elements on primary crystal temperature was measured and the relationship between primary crystal temperature （tc） and carbon equivalent （CEL） was investigated. the results show that tc （Celsius degree） = 1650-110 × （%C） -25 × （%Si）＋3 × （%Mn） -35 × （%P） -71 × （%5）-2 × （%Ni） -7 × （%Cr）; CEL=%C ＋ 0.23×（%Si）-0.03× （%Mn）＋0.32×（%P）＋0.64×（%S）＋0.02×（%Ni）＋0.06×（%Cr）. that is, in hypo eutectic composition, carbon equivalent should be calculated with CEL=%C＋ 0.23×（%Si）, not with CE=%C＋（1/3） x（%Si）.

关键词： Carbon equivalent Cast iron Primary crystal temperature Hypo eutectic composition

Hadean Earth and primordial continents:the cradle of prebiotic life

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Geoscience Frontiers 2017年第2期8卷 309-327页

作者： M.Santosh t.Arai S.maruyama School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China Department of Earth Sciences School of Physical SciencesUniversity of AdelaideSA 5005Australia Faculty of Science Kochi UniversityKochi 780-8520Japan Earth-Life Science Institute Tokyo Institute of TechnologyTokyo 152-8551Japan Okayama University MisasaJapan

the Hadean history of Earth is shrouded in mystery and it is considered that the planet was born dry with no water or *** Earth-Moon system had many features in common during the birth *** of the dry magma ocean at 4.53 Ga generated primordial continents with *** speculate that the upper crust was composed of fractionated gabbros and the middle felsic crust by anorthosite at ca.21 km depth boundary,underlain by meta-anorthosite（grossular ＋ kyanite 4 quartz）down to 50-60 km in *** thickness of the mafic KREEP basalt in the lower crust,separating it from the underlying upper mantle is not well-constrained and might have been up to ca.100-200 km depending on the degree of fractionation and gravitational stability versus surrounding mantle *** primordial continents must have been composed of the final residue of dry magma ocean and enriched in several critical elements including Ca,Mg,Fe,Mn,P,K,and Cl which were exposed on the surface of the dry *** 190 million years after the solidification of the magma ocean, ＂ABEL bombardment＂ delivered volatiles including H_2O,CO_2,N_2 as well as silicate components through the addition of icy *** event continued for 200 Myr with subordinate bombardments until 3.9 Ga,preparing the Earth for the prebiotic chemical evolution and as the cradle of first *** to vigorous convection arising from high mantle potential temperatures,the primordial continents disintegrated and were dragged down to the deep mantle,marking the onset of Hadean plate tectonics.

关键词： Earth-Moon system Primordial continents ABEL bombardment tectonic erosion Hadean plate tectonics

StUDY ON tHE tEXtURE OF A FRICtION StIR WELDED Mg-Al-Ca ALLOY

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Acta Metallurgica Sinica(English Letters) 2006年第5期19卷 335-340页

作者： D. t. Zhang M. Suzuki K. maruyama Graduate School of Environmental Studies Tohoku University 6-6-02 Aoba-yamaAoba-ku Sendai 980-8579 Japan College of Mechanical Engineering South China University of TechnologyGuangzhou 510640 China

Macro-texture of an Mg-Al-Ca alloy prepared by friction stir welding （FSW） was investigated through pole figure measurement and X-ray diffraction （XRD） pattern analysis. It was found that at the top and bottom surfaces of friction stir zone （FSZ）, （0002） basal planes of magnesium tend to be arranged parallel to the plate surface. In the cross section of FSZ, no obvious texture had evolved and （0002） basal planes showed a random distribution.

关键词： friction stir welding (FSW) Mg-Al-Ca alloy texture microstructure

the naked planet Earth:Most essential pre-requisite for the origin and evolution of life

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Geoscience Frontiers 2013年第2期4卷 141-165页

作者： S.maruyama M.Ikoma H.Genda K.Hirose t.Yokoyama M.Santosh Department of Earth and Planetary Sciences Tokyo Institute of Technology2-12-1 OokayamaMeguro-kuTokyo 152-8551Japan Department of Earth and Planetary Science.the University of tokyo 7-3-1 HongoBunkyo-kuTokyo 113-0033.Japan Department of Earth and Planetary Sciences.tokyo Institute of technology 2-12-1 OokayamaMeguro-ku.Tokyo 152-8551Japan School of Earth Sciences and Resources China University of Geosciences(Beijing) Faculty of Science Kochi UniversityKochi 780-8520Japan

Our blue planet Earth has long been regarded to carry full of nutrients for hosting life since the birth of the *** we speculate the processes that led to the birth of early life on Earth and its aftermath, finally leading to the evolution of *** evaluate：（1） the source of nutrients,（2） the chemistry of primordial ocean,（3） the initial mass of ocean,and（4） the size of *** the life-building nutrients,phosphorus and potassium play a key *** three types of rocks can serve as an adequate source of nutrients：（a） continent-forming ttG（granite）,enabling the evolution of primitive life to metazoans;（b） primordial continents carrying anorthosite with KREEP（Potassium,Rare Earth Elements, and Phosphorus） basalts,which is a key to bear life;（c） carbonatite magma,enriched in radiogenic elements such as U and th,which can cause mutation to speed up evolution and promote the birth of new species in continental rift *** second important factor is ocean *** primordial ocean was extremely acidic（pH = 1-2） and enriched in halogens（CI,F and others）,S,N and metallic elements（Cd,Cu,Zn,and others）,inhibiting the birth of *** tectonics cleaned up these elements which interfered with *** ocean finally appeared in the Phanerozoic with pH = 7 through extensive interaction with surface continental crust by weathering,erosion and transportation into *** initial ocean mass was also *** birth of life and aftermath of evolution was possible in the habitable zone with 3-5 km deep ocean which was able to supply sufficient nutrients. Without a huge landmass,nutrients cannot be supplied into the ocean only by ridge-hydrothermal circulation in the ***,the size of the planet plays a crucial *** of massive planets is less efficient than smaller ones,so that return-flow of seawater into mantle does not occur until central stars finish their main *** to the suitable size of Earth,the dawn of Phaneroz

关键词： Earth Life Habitable planet Initial ocean mass Metazoan Nutrients

the second continent:Existence of granitic continental materials around the bottom of the mantle transition zone

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Geoscience Frontiers 2013年第1期4卷 1-6页

作者： Kenji Kawai Shinji Yamamoto taku tsuchiya Shigenori maruyama Department of Earth Science University of CaliforniaSanta BarbaraCA 93106USA Department of Earth and Planetary Sciences Tokyo Institute of TechnologyOokayama 2-12-1MeguroTokyo 152-8551Japan Department of Earth and Planetary Sciences Tokyo Institute of TechnologyOokayama 2-12-1MeguroTokyo 152-8551.Japan Department of Earth Science and Astronomy Graduate School of Arts and SciencesThe University of TokyoKomaba 3-8-1MeguroTokyo 153-8902Japan Geodynamics Research Center Ehime University.Bunkyo-cho 2-5MatsuyamaEhime 790-8577Japan

It has been thought that granitic crust, having been formed on the surface, must have survived through the Earth＇s evolution because of its buoyancy. At subduction zones continental crust is predominantly created by arc magmatism and is returned to the mantle via sediment subduction, subduction erosion, and continental subduction. Granitic rocks, the major constituent of the continental crust, are lighter than the mantle at depths shallower than 270 km, but we show here, based on first principles calcu- lations, that beneath 270 km they have negative buoyancy compared to the surrounding material in the upper mantle and transition zone, and thus can be subducted in the depth range of 270-660 km. this suggests that there can be two reservoirs of granitic material in the Earth, one on the surface and the other at the base of the mantle transition zone （MtZ）. the accumulated volume of subducted granitic material at the base of the MtZ might amount to about six times the present volume of the continental crust. Our calculations also show that the seismic velocities of granitic material in the depth range from 270 to 660 km are faster than those of the surrounding mantle. this could explain the anomalous seismic-wave velocities observed around 660 km depth. the observed seismic scatterers and reported splitting of the 660 km discontinuity could be due to jadeite dissociation, chemical discontinuities between granitic material and the surrounding mantle, or a combination thereof.

关键词： Continental growthGraniteFirst principlesMantle transition zonetectonicsGeodynamics

More efficient induction of genotoxicity by high-LEt Fe-particle radiation than low-LEt X-ray radiation at low doses

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Radiation Medicine and Protection 2023年第1期4卷 11-18页

作者： Bing Wang takanori Katsube Kaoru tanaka Yasuharu Ninomiya Hirokazu Hirakawa Cuihua Liu Kouichi maruyama Masahiro Murakami tetsuo Nakajima Akira Fujimori Mitsuru Nenoi National Institutes for Quantum Science and technology Chiba263-8555Japan

Objective:to understand differential effects on induction of genotoxicity and genomic instability(GI)by high-LEt particle radiation and low-LEt photon radiation,based on ground-based experiments using total body irradiation(tBI)of mice with Fe-particle radiation and X-ray ***:tBI was delivered to C57BL/6J Jms strain female mice of 8 weeks old at a dose ranging from 0.1 to 3.0 Gy of Fe-particle radiation or at a dose ranging from 0.1 to 5.0 Gy of X-ray *** of genotoxicity and GI by tBI was determined respectively at 1 and 2 months after exposure using frequency of micronuclei in bone marrow erythrocytes as the *** of bone marrow cell proliferation by tBI was measured as reduced *** conditions were also ***:tBI,regardless of the type of radiation,caused statistically significant increase in genotoxicity at 1 month after exposure,but did not induce GI at 2 months after exposure even at higher doses(>1.0 Gy).the doseresponse curve for the frequency of micronucleated polychromatic erythrocytes induced by Fe-particle radiation and X-ray radiation was y=0.7798 t 1.7889x–0.5978x^(2)(R^(2)=0.8109)and y=0.7421 t 1.3792x–0.2588 x^(2)(R^(2)=0.8081),*** dose-response curve for the frequency of micronucleated normochromatic erythrocytes induced by Fe-particle radiation and X-ray radiation was y=0.7191 t 1.4545x–0.4978x^(2)(R^(2)=0.7047)and y=0.658 t 1.344x–0.2531x^(2)(R^(2)=0.7853),*** general,high-LEt Fe-particle radiation was more efficient in inducing genotoxicity than low-LEt X-ray radiation at lower doses(these results further confirm that exposure to tBI,even at higher doses and regardless the type of radiation,does not induce GI in C57BL/6J strain mice measured as increased micronuclei in bone marrow *** findings indicate that radiation-induced GI is mouse strain dependent and suggest that more comprehensive studies should be

关键词： Fe-particle radiation Genotoxicity Genomic instability Micronucleated erythrocyte C57BL/6J mice