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Performance Evaluation and Social Optimization of an Energy-Saving Virtual Machine Allocation Scheme Within a Cloud Environment

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Journal of the Operations Research Society of China 2020年第4期8卷 561-580页

作者： Xiushuang Wang Jing Zhu Shunfu Jin Wuyi Yue yutaka takahashi School of Information Science and Engineering Yanshan UniversityQinhuangdao 066004ShandongChina Department of Intelligence and Informatics Konan UniversityKobe 658-8501Japan Graduate School of Informatics Kyoto UniversityKyoto 606-8225Japan

Achieving greener cloud computing is non-negligible for the open-source cloud *** this paper,we propose a novel virtual machine allocation scheme with a sleep-delay and establish a corresponding mathematical *** into account the number of tasks and the state of the physical machine,we construct a two-dimensional Markov chain and derive the average latency of tasks and the energy-saving degree of the system in the steady ***,we provide numerical experiments to show the effectiveness of the proposed ***,we study the Nash equilibrium behavior and the socially optimal behavior of tasks and carry out an improved adaptive genetic algorithm to obtain the socially optimal arrival rate of ***,we present a pricing policy for tasks to maximize the social profit when managing the network resource within the cloud environment.

关键词： Cloud computing Resource allocation scheme Mathematical analysis Markov chain Socially optimization Genetic algorithm

Zircon U–Pb geochronology and Hf isotope geochemistry of magmatic and metamorphic rocks from the Hida Belt, southwest Japan

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Geoscience Frontiers 2021年第4期12卷 185-201页

作者： Deung-Lyong Cho Tae-Ho Lee yutaka takahashi Takenori Kato Keewook Yi Shinae Lee Albert Chang-sik Cheong Korea Institute of Geoscience and Mineral Resources Daejeon 34132Republic of Korea Geological Survey of Japan Tsukuba 305-8567Japan Institute for Space-Earth Environmental Research Nagoya UniversityNagoya 464-8601Japan Korea Basic Science Institute Ochang Center Cheongju 28119Republic of Korea

Zircon U–Pb and Hf isotope data integrated in this study for magmatic and metamorphic rocks fromthe Hida Belt,southwest Japan,lead to a new understanding of the evolution of the Cordilleran arc system along the ancestral margins of present-day Northeast *** microprobe data for magmatic zircon domains from eight mafic tointermediate orthogneisses in the Tateyama and Tsunogawa areas yielded weighted mean 206Pb/238U ages spanning the entire Permian period(302–254 Ma).Under cathodoluminescence,primary magmatic growth zones in the zircon crystals were observed to be partially or completely replaced by inward-penetrating,irregularly curved featureless or weakly zoned secondary domains that mostly yielded U–Pb ages of 250–240 Ma and relatively high Th/U ratios(>0.2).These secondary domains are considered to have been formed by solid-state recrystallization during thermal overprints associated with intrusions of Hida *** whole-rock geochemical and Sr–Nd isotope data as well as zircon age spectra corroborate that the Hida Belt comprises the Paleozoic–Mesozoic Cordilleran arc system built upon the margin of the North China Craton,together with the YeongnamMassif in southern *** arcmagmatismalong this systemwas commenced in the Carboniferous and culminated in the Permian–Triassic transition *** positiveεHf(t)values(>+12)of late Carboniferous to early Permian detrital zircons in the Hida paragneisses indicate that there was significant input from the depleted asthenospheric mantle and/or its crustal derivatives in the early stage of arc *** the other hand,near-chondriticεHf(t)values(+5 to−2)of magmatic zircons from late Permian Hida orthogneisses suggest a lithospheric mantle *** isotopic differences between magmatic zircon cores and the secondary rims observed in some orthogneiss samples clearly indicate that the zircons were chemically open to fluids or melts during thermal *** highly positive zirconεHf(t)val

关键词： Hida Belt Zircon U–Pb age Hf isotope Cordilleran arc Yeongnam Massif

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华南中生代岩浆活动研究：现状和前景

地质学报 2013年第S1期 137-138页

作者：毛建仁叶海敏厉子龙赵希林刘凯李寄嵎 yutaka takahashi Weon-Seo KEE 南京地质矿产研究所浙江大学地质系地球科学系台湾大学地质科学系日本产业技术研究院地质和地质情报研究所大韩民国韩国地质资源研究院

1研究现状1.1华南地质构造的复杂性华南地质构造的复杂性在于华南陆块周边存在印支陆块、华北陆块、太平洋板块和印度陆块的围限。华南是由扬子、华夏三大陆块于不同时期碰撞拼合而成,最近的研究发现华夏陆块由5-6个元古代块体拼合而成...

1研究现状1.1华南地质构造的复杂性华南地质构造的复杂性在于华南陆块周边存在印支陆块、华北陆块、太平洋板块和印度陆块的围限。华南是由扬子、华夏三大陆块于不同时期碰撞拼合而成,最近的研究发现华夏陆块由5-6个元古代块体拼合而成(许效松等,2012)。控制亚洲显生宙构造演化的三大动力体系(古亚洲洋体系,

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Correction to: Performance Evaluation and Social Optimization of an Energy-Saving Virtual Machine Allocation Scheme within a Cloud Environment

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Journal of the Operations Research Society of China 2023年第4期11卷 981-981页

作者： Wang, Xiushuang Zhu, Jing Jin, Shunfu Yue, Wuyi takahashi, yutaka School of Information Science and Engineering Yanshan University Qinhuangdao China Department of Intelligence and Informatics Konan University Kobe Japan Graduate School of Informatics Kyoto University Kyoto Japan

The authors would like to correct the style of their names in the original publication. The correct style of author names is provided in this correction.

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中国东南沿海与西南日本白垩纪-古近纪火山-侵入岩带的地球动力学特征

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资源调查与环境 2014年第3期35卷 157-168页

作者：毛建仁叶海敏 yutaka takahashi 厉子龙 Weon-Seo KEE 赵希林刘凯中国地质调查局南京地质调查中心日本产业技术研究院地质和地质情报研究所浙江大学地质系地球科学系大韩民国韩国地质资源研究院

本文讨论了中国东南沿海和西南日本两条白垩纪-古近纪火山-侵入岩带的地球动力学特征。两条火山-侵入岩带的下火山岩系岩石经受了左旋走滑的韧性剪切变形而形成片理或片麻理构造。中国东南沿海火山-侵入活动的起始时间、动力变形和结束... 详细信息

本文讨论了中国东南沿海和西南日本两条白垩纪-古近纪火山-侵入岩带的地球动力学特征。两条火山-侵入岩带的下火山岩系岩石经受了左旋走滑的韧性剪切变形而形成片理或片麻理构造。中国东南沿海火山-侵入活动的起始时间、动力变形和结束时间都早于日本约30Ma。西南日本高镁安山岩和埃达克岩（120～105Ma）是在大面积白垩纪岩浆作用的起始阶段由大洋俯冲板片在高温条件下部分熔融形成的。火山-侵入活动的结束标志中国东南沿海岩浆岩带是板内环境的晶洞A型花岗岩和以流纹岩为主的双峰式火山岩；在西南日本岩浆岩带是年轻地壳挤压重熔的S型过铝质石榴石/白云母细粒花岗岩和流纹岩，不存在类似华南的壳源S型花岗岩，中国东南沿海没有代表洋壳俯冲的弧岩浆岩。两条火山-侵入岩带的源区都以幔源为主并有前寒武纪再旋回地壳物质加入，它们的Sr-Nd同位素组成表明：随时间推移，中国东南沿海火山-侵入岩中幔源组分增加，而西南日本则相反。华南中生代大规模岩浆活动的开始（170＆#177;5Ma）是在古太平洋板块斜向俯冲背景下，大陆岩石圈减薄，陆内深断裂再活化的结果。东亚大陆边缘在晚中生代（120Ma）进入古太平洋板块正向俯冲构造体系，但不同地段的表现不同。

关键词：韧性剪切带变形岩浆活动白垩纪-古近纪火山-侵入岩带中国东南沿海岩浆岩带西南日本岩浆岩带古太平洋板块俯冲

中国东南部与日本中—新生代构造-岩浆作用对比研究

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地质通报 2009年第7期28卷 844-856页

作者：毛建仁高桥浩厉子龙中岛隆叶海敏赵希林周洁胡青曾庆涛中国地质调查局南京地质矿产研究所江苏南京210016 日本产业技术研究院地质和地质情报研究所日本筑波3058567 浙江大学地球科学系浙江杭州310027 南京大学地球科学系江苏南京210093

重点讨论了中国东南部和日本中、新生代火成岩的时空分布及其构造环境,总结了两者的异同性。印支期和燕山早期(190～170Ma)中国东南部和日本具有不同的岩浆活动演化史。在165～150Ma期间,中国东南部广泛分布有过铝和弱过铝的S型花岗岩,... 详细信息

重点讨论了中国东南部和日本中、新生代火成岩的时空分布及其构造环境,总结了两者的异同性。印支期和燕山早期(190～170Ma)中国东南部和日本具有不同的岩浆活动演化史。在165～150Ma期间,中国东南部广泛分布有过铝和弱过铝的S型花岗岩,而170～130Ma则为日本岩浆活动沉寂期。燕山晚期,中国东南部和日本都发生大规模的火山-侵入活动,同是库拉-太平洋板块向欧亚大陆俯冲-碰撞及其后伸展-裂解的产物,日本开始时代晚(130Ma),并一直持续到始新世(45Ma)。进入喜马拉雅期,在日本海打开之前(>15Ma),中国东南部和日本同处于大陆伸展构造环境,在日本海打开之后(<15Ma),中国东南部和日本进入完全不同的构造演化阶段。

关键词：时空分布岩浆作用中新生代中国东南部和日本

Unsteady Behavior of Surge and Rotating Stall in an Axial Flow Compressor

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Journal of Thermal Science 2012年第4期21卷 302-310页

作者： yutaka OHTA yutaka FUJITA Daisuke MORITA Department of Applied Mechanics and Aerospace Engineering Waseda University 3-4-1 Okubo Shinjuku Graduate Student Graduate School of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku

Unsteady behaviors as well as unsteady cascade flow fields of a single-stage axial flow compressor were experi- mentally investigated by detail measurements of unsteady performance characteristics and casing wall pressure and internal flow velocity fluctuations. The main feature of the test compressor is a capacity tank connected di- rectly to the compressor outlet in series through slits and a concentric duplex pipe, and also jet nozzles in order to inject compressed air toward the rotor tip region. Research attention is focused on the post-stall characteristics of surge and rotating stall which occur simultaneously. When the compressor was connected to the capacity tank, surge was generated with rotating stall in accordance with the capacitance increment of whole compressor system The surge behavior changed irregularly with throttling valve installed behind the compressor, and several types of surge cycles were observed. In addition, the surge cycle changed by jet injection to the rotor tip region. The re- suits suggested that the blockages of the cascade flow which were generated by a stall cell play an important role in deciding the surge behaviors.

关键词： Axial flow compressor Surge Rotating stall Stall cell Jet injection

THE M/PH/1 QUEUE WITH WORKING VACATIONS AND VACATION INTERRUPTION

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Journal of Systems Science and Systems Engineering 2010年第4期19卷 496-503页

作者： yutaka BABA Faculty of Education and Human Sciences Yokohama National University

We study an M/PH/1 queue with phase type working vacation and vacation interruption where the vacation time follows a phase type distribution. The server serves the customers at a lower rate in a vacation period. The server comes back to the regular busy period at a service completion without completing the vacation. Such policy is called vacation interruption. In terms of quasi birth and death process and matrix-geometric solution method, we obtain the stationary queue length distribution. Moreover we obtain the conditional stochastic decomposition structures of queue length and waiting time when the service time distribution in the regular busy period is exponential.

关键词： Working vacation vacation interruption phase type distribution quasi birth and death process matrix-geometric solution stochastic decomposition

Is a nasogastric tube necessary after transumbilical laparoscopic-assisted appendectomy in children with perforated appendicitis?

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World Journal of Pediatrics 2019年第6期15卷 615-619页

作者： Akinori Sekioka Koji Fukumoto Toshiaki takahashi Hiromu Miyake Kengo Nakaya Akiyoshi Nomura yutaka Yamada Naoto Urushihara Department of Pediatric Surgery Shizuoka Children's Hospital860 UrushiyamaAoi-kuShizuoka 420-8660Japan

Background This study assessed the necessity of postoperative nasogastric tube(NGT)use in acute pediatric cases of per-forated *** All cases of acute pediatric perforated appendicitis managed with transumbilical laparoscopic-assisted appendec-tomy at our hospital from 2011 to 2017 were retrospectively ***-two cases were selected and divided into two groups based on NGT *** There were no significant differences between the two groups in most parameters of patient demographics,or surgi-cal ***,the mean time to first oral intake and to regular diet was significantly shorter in no-NGT group(1 day vs 3 days,P<0.0001;and 4 days vs 7 days,P=0.003,respectively).Postoperative length of stay was significantly shorter in no-NGT group(7 days vs 9 days,P<0.0001).Conclusion Considering the results of our analysis,we believe that routine NGT placement is not always necessary in these situations.

关键词： Children Perforated appendicitis Postoperative care