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New Species of Meconopsis(Papaveraceae) from Laojun Shan and Yao Shan,Northern Yunnan,China

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植物分类与资源学报 2012年第2期34卷 145-149页

作者： yoshida Toshio BOUFFORD David e Hoshiya 330-6 Oamishirasato-machiSambu-gunChiba 299-3222Japan Harvard University Herbaria 22 Divinity AvenueCambridgeMA 02138-2020U.S.A.

Two new species,Meconopsis muscicola and ***(Papaveraceae),are described and *** separating them from similar species are discussed and photos showing their diagnostic features are provided.

关键词： Meconopsis M.muscicola M.yaoshanensis New species Yunnan Laojun Shan Yao Shan

New Species of Meconopsis (Papaveraceae) from Mianning,Southwestern Sichuan,China

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云南植物研究 2010年第6期32卷 503-507页

作者： yoshida Toshio SUN Hang BOUFFORD David e. Hoshiya 330-6 Oamishirasato-machiSambu-gunChiba 299-3222Japan Key Laboratory of Biodiversity and Biogeography Kunming Institute of BotanyChinese Academy of SciencesKunming 650204China Harvard University Herbaria 22 Divinity AvenueCambridgeMA 02138-2020U.S.A.

Two new species of Meconopsis,*** and *** are described and characterized. Differences with similar species are discussed and photos showing the diagnostic features are provided.

关键词： Meconopsis M.pulchella M.heterandra New species Sichuan

Meconopsis wilsonii *** (Papaveraceae) Rediscovered

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云南植物研究 2007年第3期29卷 286-288页

作者： Toshio yoshida Hang SUN David e. BOUFFORD Hoshiya 330-6 Oamishirasato-machi Sambu-gun Chiba 299-3222 Japan Laboratory of Biodiversity and Biogeography Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China Harvard University Herbaria 22 DivinityAvenue Cambridge MA 02138-2020 U.S.A.

Field studies in the Lamagetou Nature Reserve, Mianning Xian, Sichuan Province, in the summer of 2005 revealed a particularly rich and diverse flora. One particularly noteworthy plant growing in openings in the forest, at woodland margins and on exposed slopes, was the recently described Meconopsis wilsonii Grey-Wilson *** (Papaveraceae), a species previously known only from the type collection and last collected in 1908, nearly 100 years ago.

关键词：罂粟科新记录四川植物种属检索表

Plate and plume tectonics:Numerical simulation and seismic tomography

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Geoscience Frontiers 2015年第1期6卷 1-2页

作者： Masaki yoshida Department of Deep earth Structure and Dynamics Research Jaan Agency for Marine-Earth Science and Technology(JAMSTEC)

About three decades after the establishment of the plate tec- tonics theory in the late 1960s, Maruyama （1994） proposed the ＂plume tectonics＂ theory based on whole-mantle seismic tomogra- phy image （Fukao, 1992; Fukao et al., 1994）. According to this the- ory, the earth＇s interior is divided into three regimes： the earth＇s surface region governed by lateral motions of tectonic plates, the mantle governed by vertical motions of ＂superplumes＂（i.e., large- scale mantle upwelling/downwelling plumes）, and the core, whose convection style is probably controlled by superplumes in the mantle. With the rapid progress in earth science after the birth of the plume tectonics theory, it is now widely accepted that various geological phenomena observed in the earth＇s surface are closely linked to the fluid motion in the deep mantle （e.g., Davies, 2011）.

关键词： Plate and plume tectonics UHT deep LVL

TeSTING k-eDGe-CONNeCTIVITY OF DIGRAPHS

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Journal of Systems Science & Complexity 2010年第1期23卷 91-101页

作者： Yuichi yoshida.HiroI TO School of Informatics Kyoto University

This paper presents an algorithm that tests whether a given degree-bounded digraph is k-edge-connected or e-far from k-edge-connectivity. This is the first testing algorithm for k-edge- connectivity of digraphs whose running time is independent of the number of vertices and edges. A digraph of n vertices with degree bound d is ε-far from k-edge-connectivity if at least εdn edges have to be added or deleted to make the digraph k-edge-connected, preserving the degree bound. Given a constant error parameter ε and a degree bound d, our algorithm always accepts all k-edge-connected digraphs and reiects all digraphs that is ε-far from k-edge-connectivity with orobabilitv at least 2/*** runs in O（d（εd^-c）^k logεd^-1O）（c〉1 is a constant）time when input digraphs are restricted to be （k-1）-edge connected and runs in O（d（εd^-ck）^klogεd^-kO）（c〉1 is a constant）time for general digraphs.

关键词： Digraph graph k-edge-connectivity property testing.

Mantle convection modeling of the supercontinent cycle: Introversion,extroversion, or a combination?

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Geoscience Frontiers 2014年第1期5卷 77-81页

作者： Masaki yoshida M.Santosh Institute for Research on earth evolution (IFRee) Japan Agency for MarineeEarth Science and Technology (JAMSTEC) 2-15 Natsushima-choYokosukaKanagawa 237-0061 Japan Division of Interdisciplinary Science Faculty of Science Kochi UniversityAkebono-cho 2-5-1Kochi 780-8520 Japan School of earth Sciences and Resources China University of Geosciences (Beijing)

The periodic assembly and dispersal of continental fragments, referred to as the supercontinent cycle, bear close relation to the evolution of mantle convection and plate tectonics. Supercontinent formation involves complex processes of ＂introversion＂（closure of interior oceans）, ＂extroversion＂（closure of exterior oceans）, or a combination of these processes in uniting dispersed continental fragments, Recent developments in numerical modeling and advancements in computation techniques enable us to simulate earth＇s mantle convection with drifting continents under realistic convection vigor and rheology in earth-like geometry （i.e., 3D spherical-shell）. We report a numerical simulation of 3D mantle convection, incorporating drifting deformable continents, to evaluate supercontinent processes in a realistic mantle convection regime. Our results show that supercontinents are assembled by a combi- nation of introversion and extroversion processes. Small-scale thermal heterogeneity dominates deep mantle convection during the supercontinent cycle, although large-scale upwelling plumes intermit- tently originate under the drifting continents and/or the supercontinent.

关键词： Mantle convection Numerical simulation Tectonics Supercontinent cycle Introversion extroversion

energetics of the Solid earth:An integrated perspective

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energy Geoscience 2020年第1期1卷 28-35页

作者： Masaki yoshida M.Santosh Geophysical Research Group Research Center for Volcanoes and Earth’s InteriorJapan Agency for Marine-Earth Science and Technology(JAMSTEC)2-15 Natsushima-choYokosuka237-0061Japan School of earth Sciences and Resources China University of GeosciencesBeijing100083China Department of earth Sciences School of Physical SciencesUniversity of AdelaideSA5005Australia

The internal energy of the Solid earth is mainly transferred through thermal convection of the ***,we discuss the 10^(20)-J-scale energy relating to the dynamics of the Solid earth’s *** energy released from the interior of the present-day earth to outer space per year is estimated as e_(earth)=1.4×10^(21) J yr^(-1) based on the recent dataset of globally observed crustal heat flow,which is a factor of two or three times larger than the annual energy consumption of the total population of the world,5.7×10^(20) J yr^(-1).Of the energy from global crustal heat flow,the energy released by all of the major hotspot plumes in volcanic vents per year is estimated as e_(plume)=7.2×10^(19) J yr^(-1),which is approximately only 6%of the *** propose that a large number of mantle plumes have not emerged as hotspots on the earth’s surface,with the possibility that eplume is larger than expected if the energy released from small seamounts of the earth is *** the heat(energy)budget of the earth,the heat production by the decay of radioactive isotopes in the mantle and crust is nearly comparable to the heat released by the secular cooling of the *** eearth,the annual energy released by the secular cooling of the earth is estimated as 6.6×10_(20) J yr^(-1).This energy is closely related to the geothermal energy from our planet.

关键词： Solid earth energy Hot spots earthquakes Volcanic eruptions

Improvement of die life in high speed injection die casting

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China Foundry 2008年第4期5卷 280-285页

作者： Yasuhiro Arisuda Akihito Hasuno Junji yoshida Kazunari Tanii RYOBI Limited Nippon Kosyuha Steel Co. Ltd.

High-speed injection die casting is an efficient manufacturing technology for upgrading aluminum die-cast ***,deficiencies(such as die damage in early period)due to larger load on the molding die compared with conventional technology have brought new *** this study,the cause of damage generated in super high-speed injection was investigated by the combination of experimental observation of the dies and CAe simulation(*** temperature analysis,flow analysis and thermal stress analysis).The potential countermeasures to solve the above problems were also proposed.

关键词： CAe simulation die casting heat check thermal stress

Changes of forest land use and ecosystem service values along Lao-Chinese border:A case study of Luang Namtha Province,Lao PDR

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Forestry Studies in China 2009年第2期11卷 85-92页

作者： Hemmavanh CHANHDA WU Ci-fang yoshida AYUMI Department of Land Resource Management Zhejiang University Hangzhou 310029 P. R. China Zhejiang University Tea Research Institute Hangzhou 310029 P. R. China

Forest cover and land use change directly impact biological diversity worldwide, contribute to climate change and affect the ability of biological systems to support human needs by altering ecosystem services. Given the forest land use characteristics and ecosystem types in Luang Namtha Province, Lao PDR, the forest cover and land cover category of Luang Namtha Province were divided into six classes, i.e., current forest （CF）, potential forest （PF）, other wooded areas （OW）, permanent agricultural land （PA）, other non-forest areas （NF） and water （W）. In first instance, earlier geographic information data （GIS data） of forest cover and land use during 1992 and 2002 was obtained from the Ministry of Agriculture and Forestry （MAF）, Lao PDR. Two steps of forest land use change assessment were conducted by the MAF, i.e., plot sampling on satellite image maps （SIMs） to detect the changes of forest cover and land use during 1992 and 2002 for the entire Luang Namtha Province and field verification in order to identify causes of the changes. Secondly, dynamic information of the forest land cover changes during this ten-year period was calculated by means of map algebra in ArcGIS 9.2. Thirdly, based on the theory of ecosystem service functions and the service function values of different global ecosystems, the value of the six forest cover and land use categories in the province was obtained. Finally, ecological environmental effects, produced by the regional land cover changes over the study period, were calculated.

关键词： ecosystem services forest land use Luang Namtha Lao PDR