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Observation of Edge Plasma Fluctuations with a Fast Camera in Heliotron J

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Plasma Science and Technology 2013年第3期15卷 213-216页

作者：臧临阁 M.TAKEUCHI N.NISHINO T.MIZUUCHI S.OHSHIMA K.KASAJIMA M.SHA K.MUKAI H.y.LEE K.NAGASAKI H.OKADA T.MINAMI S.KOBAyASHI S.yAMAMOTO K.HANATANI y.nakamura S.KONOSHIMA F.SANO Graduate School of Energy Science Kyoto University Naka Fusion Institute Japanese Atomic Energy Agency Graduate School of Engineering Hiroshima University Institute of Advanced Energy Kyoto University

A fast video camera is verified to be a powerful t0ol for observation of filaments/blobs near the last closed flux surface （LCFS）. In order to extract the fluctuation component from the raw data of the fast camera, a pre-processing technique, sliding time window averaging subtraction （STWAS） has been developed to remove the background of slowly varying emission from the bulk plasma. By using this pre-processing technique, the fast camera data are analyzed. A method to identify the filaments in the pre-processed image is also discussed.

关键词： edge plasma fluctuation fast camera Heliotron J

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三菱长行程S6U2型柴油机的开发

国外内燃机车 1993年第7期 7-15页

作者： y.nakamura 于长贵

三菱重工有限公司新开发的S6U26缸直列式柴油机是缸径为240mm的SU系列发动机中的长行程变型机。该机的行程为300mm,而现有SU系列发动机的行程为260mm。本文介绍目前已经投入正常生产的S6U2型发动机的结构特点以及在开发阶段中所作的研... 详细信息

三菱重工有限公司新开发的S6U26缸直列式柴油机是缸径为240mm的SU系列发动机中的长行程变型机。该机的行程为300mm,而现有SU系列发动机的行程为260mm。本文介绍目前已经投入正常生产的S6U2型发动机的结构特点以及在开发阶段中所作的研究。在性能方面,文章着重说明了通过优化进、排气门定时和改善涡轮增压器性能降低燃油消耗以及通过改进燃油喷射系统减少NO_x排放。在可靠性方面,文章介绍了对曲轴采用三维有限元模型进行的计算和在实际运行工况下进行的应力测量,同时还简述了对机体进行应力测量所得的结果。

关键词：柴油机设计燃油消耗率内燃机车

Low-Energy Spin Excitations in Detwinned FeSe

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Chinese Physics Letters 2024年第6期41卷 112-118页

作者：刘瑞鲜 Mitsutaka nakamura Kazuya Kamazawa 鲁兴业 Center for Advanced Quantum Studies School of Physics and AstronomyBeijing Normal UniversityBeijing 100875China J-PARC Center Japan Atomic Energy Agency(JAEA)TokaiIbaraki 319-1195Japan Research Center for Neutron Science and Technology Comprehensive Research Organization for Science and SocietyTokaiIbaraki 319-1106Japan

Antiferromagnetic spin fluctuation is regarded as the leading driving force for electron pairing in high-Tc *** iron-based superconductors,spin excitations at low energy range,especially the spin-resonance mode at ER~5kBTc,are important for understanding the ***,we use inelastic neutron scattering(INS)to investigate the symmetry and in-plane wave-vector dependence of low-energy spin excitations in uniaxial-strain detwinned Fe *** low-energy spin excitations(Ey at Q=(±1,0)in the superconducting state(T9K)and the nematic state(T90 K),confirming the constant C_(2) rotational symmetry and ruling out the C_(4) mode at E≈3 meV reported in a prior INS ***,our results reveal an isotropic spin resonance in the superconducting state,which is consistent with the s±wave pairing *** slightly higher energy,low-energy spin excitations become highly *** full width at half maximum of spin excitations is elongated along the transverse *** Q-space isotropic spin resonance and highly anisotropic low-energy spin excitations could arise from dyz intra-orbital selective Fermi surface nesting between the hole pocket aroundΓpoint and the electron pockets centered at MX point.

关键词： excitation symmetry slightly

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结构的抗风动力稳定性

国外桥梁 1987年第4期 1-14页

作者： M.Ito y.nakamura 陈守容

本文对柔性结构由风引起的动力失稳,按照跳振,扭转颤振,耦合颤振和涡流激振以及低风速颤振的分类进行了述评。也叙述了对付这些现象的设计实践。最后提到了风洞实验技术。

关键词：颤振流线形经典型准定常气动力结构振动跳跃振动结构杆件气动力矩涡流激振空气动力失稳临界风速气动弹性空气动力弹性动力稳定性抗风

Plasma Confinement Characteristics in Heliotron J——Spontaneous Change of Plasma Confinement State

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Plasma Science and Technology 2004年第4期6卷 2371-2376页

作者： T.Mizuuchi H.Okada K.Nagasaki S.Kobayashi S.yamamoto F.Sano K.Kondo K.Hanatani M.Nakasuga y.nakamura y.Suzuki y.Manabe H.Shidara H.Kawazome M.Kaneko y.Nishioka y.Ohno T.Takamiya H.yukimoto y.Fukagawa y.Morita S.Nakazawa S.Nishio K.Takahashi S.Tuboi M.yamada K.Ohashi y.Ijiri T.Senju K.yaguchi K.Sakamoto K.Tohshi M.Shibano T.Obiki Institute of Advanced Energy Kyoto UniversityUji 611-0011Japan Graduate School of Energy Science Kyoto UniversityUji 611-0011Japan

Spontaneous transition of the plasma confinement mode was observed in thehelical-axis heliotron device 'Heliotron J' for three different plasma heating schemes, ***-only, NBI-only and the combination of ECH and NBI. The transition seems to occur above a certaincritical density. In addition to the confinement transition, a spontaneous shift of the hittingposition of the divertor plasma flux on the wall was observed. This shift could be related with thechange of the edge field topology caused by non-inductive toroidal currents.

关键词： heliotron J plasma confinement transition phenomena

Regenerative medicine strategies for chronic complete spinal cord injury

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Neural Regeneration Research 2024年第4期19卷 818-824页

作者： Shogo Hashimoto Narihito Nagoshi Masaya nakamura Hideyuki Okano Department of Orthopedic Surgery Keio University School of Medicine Department of Physiology Keio University School of Medicine

Spinal cord injury is a condition in which the parenchyma of the spinal cord is damaged by trauma or various *** rapid progress has been made in regenerative medicine for spinal cord injury that was previously untreatable,most research in this field has focused on the early phase of incomplete ***,the majority of patients have chronic severe injuries;therefore,treatments for these situations are of fundamental *** reason why the treatment of complete spinal cord injury has not been studied is that,unlike in the early stage of incomplete spinal cord injury,there are various inhibitors of neural ***,we assumed that it is difficult to address all conditions with a single treatment in chronic complete spinal cord injury and that a combination of several treatments is essential to target severe ***,we established a combination therapy of cell transplantation and drug-releasing scaffolds,which contributes to functional recovery after chronic complete transection spinal cord injury,but we found that functional recovery was limited and still needs further ***,for the further development of the treatment of chronic complete spinal cord injury,we review the necessary approaches to the different pathologies based on our findings and the many studies that have been accumulated to date and discuss,with reference to the literature,which combination of treatments is most effective in achieving functional recovery.

关键词： cell transplantation chronic phase complete transection regenerative medicine spinal cord injury

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高频振型的CQC振型组合规则

世界地震工程 1994年第2期10卷 68-76,62页

作者： A.D.Kiureghian y.nakamura 纪万斌

一、前言结构地震分析的CQC振型组合规则,即完全二次振型组合规则得到了研究和专业技术人员的广泛重视,它已经在许多标准计算机程序中实现,并为SEAOC,API和其它规范推荐用于具有密集空间振型的结构反应计算。这个组合规则的成功在于它... 详细信息

一、前言结构地震分析的CQC振型组合规则,即完全二次振型组合规则得到了研究和专业技术人员的广泛重视,它已经在许多标准计算机程序中实现,并为SEAOC,API和其它规范推荐用于具有密集空间振型的结构反应计算。这个组合规则的成功在于它计算精确,简单、实用,它是在明确的假设和近似条件下,从随机振动的基本原理导得的。在推导原来的CQC规则中,一个重要的假定是输入激励必须具有宽频带。

关键词：建筑高频振型振型组合规则抗震

Non-Kramers doublet ground state in a quaternary cubic compound PrRu_(2)In_(2)Zn_(18) investigated by ultrasonic measurements

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Chinese Physics B 2024年第6期33卷 405-411页

作者：张化远 Kazuhei Wakiya Mitsuteru nakamura Masahito yoshizawa yoshiki Nakanish Graduate School of Science and Engineering Iwate UniversityMorioka 020-8551Japan

We performed ultrasonic measurements on a quaternary cubic compound PrRu_(2)In_(2)Zn_(18) to explore the ground state properties derived from non-Kramers Γ_(3) doublet of Pr^(3+).PrRu_(2)In_(2)Zn_(18) is a quaternary derivative of the ternary compound PrRu_(2)Zn_(20) that exhibits a structural phase transition at T_S=138 *** PrRu_(2)In_(2)Zn_(18),the Zn atoms at the 16c site in PrRu_(2)Zn_(20) are selectively replaced by In atoms.A monotonic increase was observed in the temperature dependence of elastic constants C_L=(C_(11)+2C_(12)+4C_(44))/3 and C_(T)=(C_(11)-C_(12)+C_(44))/3 in the temperature range around T_(S) to which an elastic softening was observed in(C_(11)-C_(12))/2 for PrRu_(2)Zn_(20).The disappearance of the softening indicates that the structural transition in PrRu_(2)Zn_(20) is suppressed by the substitution of Zn ions by In ones with a larger ionic ***,the C_(T) of PrRu_(2)In_(2)Zn_(18) exhibits a precursor Curie-type elastic softening toward low temperatures being responsible for the non-Kramers Γ_(3) ground *** discuss the ground state and the evolution of the elastic properties of the different single-crystal samples of PrRu_(2)In_(2)Zn_(18) grown under different conditions.

关键词： ultrasonic measurements non-Kramers doublet structural phase transition crystalline electric field effect

Mission of the National Cancer Center Hospital in Japan to promote clinical trials for precision medicine

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Cancer Biology & Medicine 2024年第1期21卷 1-3页

作者： Kazuaki Shimada Kenichi nakamura Noboru yamamoto Department of Hepatobiliary and Pancreatic Surgery National Cancer Center HospitalTokyo 104-0045Japan Clinical Research Support Offce National Cancer Center HospitalTokyo 104-0045Japan Department of Experimental Therapeutics National Cancer Center HospitalTokyo 104-0045Japan

Precision medicine is a growing field *** its potential benefit to many patients,several major obstacles must be overcome before precision medicine can be more widely used in clinical *** main obstacles are associated... 详细信息

关键词： clinical Cancer overcome