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Neural Regeneration Research 2022年第2期17卷 311-312页

作者： ken-ichiro Tanaka Mikako Shimoda Masahiro Kawahara Department of Bio-Analytical Chemistry Faculty of PharmacyMusashino UniversityShinmachiNishitokyoTokyoJapan

In many tissues, trace metals such as iron(Fe), zinc(Zn), and copper(Cu) are important for various physiological functions such as immune function, cell division, and enzyme function. However, it has been shown in humans and experimental animal models that excessive amounts of these trace metals in the body can induce various diseases in the central nervous system, liver.

关键词： metals potential copper

A geospatial search engine for discovering multi-format geospatial data across the web

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International Journal of Digital Earth 2016年第1期9卷 47-62页

作者： Christopher Bone Alan Ager ken Bunzel Lauren Tierney Department of Geography University of OregonEugeneORUSA USDA Forest Service Western Wildland Environmental Threat CenterPrinevilleORUSA Kingbird Software MoscowIDUSA

The volume of publically available geospatial data on the web is rapidly increasing due to advances in server-based technologies and the ease at which data can now be ***,challenges remain with connecting individuals searching for geospatial data with servers and websites where such data *** objective of this paper is to present a publically available Geospatial Search Engine(GSE)that utilizes a web crawler built on top of the Google search engine in order to search the web for geospatial *** crawler seeding mechanism combines search terms entered by users with predefined keywords that identify geospatial data services.A procedure runs daily to update map server layers and metadata,and to eliminate servers that go *** GSE supports Web Map Services,ArcGIS services,and websites that have geospatial data for *** applied the GSE to search for all available geospatial services under these formats and provide search results including the spatial distribution of all obtained *** enhancements to our GSE and to web crawler technology in general lie ahead,our work represents an important step toward realizing the potential of a publically accessible tool for discovering the global availability of geospatial data.

关键词： geospatial data web crawler search engine Web Map Service data access

A hybrid multi-objective optimization method considering optimization problems in power distribution systems

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Journal of Modern Power Systems and Clean Energy 2015年第1期3卷 41-50页

作者： ken KURODA Hideki MAGORI Tomiyasu ICHIMURA Ryuichi YOKOYAMA Waseda University Shinjuku-kuTokyo 91107Japan Fujitsu Limited Ohta-kuTokyo 144-8588Japan

Various kinds of new engineering technologies have been studied to realize the low-carbon and sustainable power supply systems all over the *** actual implementation of these technologies,mostly,there are multiple objectives with trade off relationships among each other,and also various constraints in the achievement of these ***,it should be essential to solve multiobjective optimization problems effectively in the applications of these new technologies in power *** paper proposes an improved method to realize multiobjective optimization for critical challenges in advanced power *** realize that,in an optimal dispersed generation installation problem,that is,one of effective measures for low-carbon power systems,various optimization methods and their combination methods are evaluated and a hybrid method for evolutionary algorithms was *** method can provide improved results compared with other state-of-the-art multi-objective optimization methods.

关键词： Dispersed generation Distribution system Evolutional strategy Multi-objective optimization Optimal power flow

Large eddy simulation of free-surface flows

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Journal of Hydrodynamics 2017年第1期29卷 1-12页

作者： Richard J.McSherry ken V.Chua Thorsten Stoesser School of Engineering Cardiff UniversityCardiffCF24 3AAUK

This paper introduces and discusses numerical methods for flee-surface flow simulations and applies a large eddy simula- tion （LES） based flee-surface-resolved CFD method to a couple of flows of hydraulic engineering interest. The advantages, dis- advantages and limitations of the various methods are discussed. The review prioritises interface capturing methods over interface tracking methods, as these have shown themselves to be more generally applicable to viscous flows of practical engineering interest, particularly when complex and rapidly changing surface topologies are encountered. Then, a LES solver that employs the level set method to capture flee-surface deformation in 3-D flows is presented, as are results from two example calculations that concern com- plex low submergence turbulent flows over idealised roughness elements and bluff bodies. The results show that the method is capable of predicting very complex flows that are characterised by strong interactions between the bulk flow and the free-surface, and permits the identification of turbulent events and structures that would be very difficult to measure experimentally.

关键词： Large eddy simulation free-surface level set method volume of fluid

Gait Definition and Successive Gait-transition Method Based on Energy Consumption for a Quadruped

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Chinese Journal of Mechanical Engineering 2012年第1期25卷 29-37页

作者： ZHAO Danpu XU Jing WU Dan CHEN ken LI Chengrong Institute of Automation Chinese Academy of SciencesBeijing 100190China Department of Precision Instruments and Mechanology Tsinghua UniversityBeijing 100084China

In nature, to realize the smooth motion for different speeds, the continuous gait transition is usually required for the quadrupeds. Thus, the gait simulation of quadrupeds is a requisite step to obtain the stable and energy-efficient gait for the walking machines. In this paper, the definitions of the two gait parameters, phasic difference and duty factor are presented, which can determine the gait of the quadrupeds. Then, several typical gaits of the quadrupeds are analyzed such that the seven standard gaits and corresponding parameters are summarized. Additionally, the variance law of the two parameters, which determine the relationship of gait transition, is analyzed. Furthermore, the quadruped gait derivative spectrum (QGDS) is proposed and the gait definition of the quadrupeds is presented. To minimize the power consumption, the choice criterion of gait, the optimal gait in terms of the motion speed, duty factory, and power consumption for the walking machines, is developed. Last, the continuous variance of the gait is implemented by the simulation of the gait transition from walk to trot, which evaluate the choice criterion and transition of gait.

关键词： gait definition standard gaits quadruped gait-transition

Synthesis and luminescent properties of low oxygen contained Eu^(2+)-doped Ca-α-SiAlON phosphor from calcium cyanamide reduction

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Journal of Rare Earths 2008年第2期26卷 198-202页

作者： PIAO Xianqing ken-ichi Machida Takashi Horikawa Hiromasa Hanzawa Center for Advanced Science and Innovation Osaka University 2-1 Yamadaoka Suita

A new convenient calcium cyanamide （CaCN2） reduction route was developed to synthesize the Eu^2＋ activated Ca-α-SiAION phosphors containing low oxygen content. The luminescence properties of the obtained products were investigated for white LEDs application. The critical Eu^2＋ concentration in various hosts and its effect on the photoluminescence properties were studied. The optimized sample （10at.% Eu^2＋ vs. Ca^2＋） could be efficiently excited by the current GaN/InGaN blue LED chips and provided emission intensity competitive with that of YAG：Ce^3＋（P46-Y3） standard, revealing that this phosphor was a potential candidate for phosphor-converted white LEDs.

关键词： nitride phosphor white LEDs SiAION Eu^2+ CaCN2 rare earths

Closing the gap between atomic-scale lattice deformations and continuum elasticity

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npj Computational Materials 2019年第1期5卷 737-745页

作者： Marco Salvalaglio Axel Voigt ken R.Elder Institute of Scientific Computing Technische Universität Dresden01062 DresdenGermany Dresden Center for Computational Materials Science(DCMS) TU Dresden01062 DresdenGermany Department of Physics Oakland UniversityRochesterMI 48309USA

Crystal lattice deformations can be described microscopically by explicitly accounting for the position of atoms or macroscopically by continuum *** this work,we report on the description of continuous elastic fields derived from an atomistic representation of crystalline structures that also include features typical of the microscopic *** expressions for strain components are obtained from the complex amplitudes of the Fourier modes representing periodic lattice positions,which can be generally provided by atomistic modeling or *** magnitude and phase of these amplitudes,together with the continuous description of strains,are able to characterize crystal rotations,lattice deformations,and ***,combined with the so-called amplitude expansion of the phase-field crystal model,they provide a suitable tool for bridging microscopic to macroscopic *** study enables the in-depth analysis of elasticity effects for macroscale and mesoscale systems taking microscopic details into account.

关键词： lattice elasticity macroscopic

Recycle for Sludge Scrap of Nd-Fe-B Sintered Magnet as Isotropic Bonded Magnet

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Journal of Rare Earths 2004年第1期22卷 168-171页

作者： Masahiro Itoh Masahiro Masuda Shunji Suzuki ken-ichi Machida Collaborative Research Center for Advanced Science and Technology Collaborative Research Center for Advanced Science and TechnologyCollaborative Research Center for Advanced Science and TechnologyCollaborative Research Center for Advanced Science and Technology Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Osaka University 2-1 Yamadaoka Suita Osaka 565-0871

The reduction diffusion method was performed for the sludge scrap of Nd-Fe-B sintered magnets with adding Ca metal to recover the oxidized Nd-Fe-B phase. After washing the resultant powders to remove Ca metal component, the powders obtained were recycled as an isotropic magnetic powder by the melt spinning method. The magnetic properties of powders as recycled were inferior, especially for the coercivity value, due to the deletion of rare earth metals during the washing process. The adjustment of metal composition, i.e., the addition of Nd metal, at the melt spinning process improved the magnetic properties to be B r=～0.75 T, H cj=～0.93 mA·m -1, and (BH) max=～91 kJ·m -3. The magnetic properties of the bonded magnets prepared from the composition-adjusted powders were B r=～0.66 T, H cj=～0.92 mA·m -1, and (BH) max=～70 kJ·m -3, which are approximately comparable to the commercially available MQPB boned one (B r=～0.73 T, H cj=～0.79 mA·m -1, and (BH) max=～86 kJ·m -3).

关键词： Nd-Fe-B sintered magnet recycling isotropic Nd-Fe-B bonded magnet melt-spinning method sludge scrap rare earths

Mass Distribution of Black Holes with Effects of Convective Carbon Shell Burning on Pair-instability Pulsation and Fe Core Collapse

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Research in Astronomy and Astrophysics 2023年第1期23卷 153-160页

作者： Wenyu Xin ken’ichi Nomoto Gang Zhao Xianfei Zhang CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Kavli Institute for the Physics and Mathematics of the Universe(WPI) The University of Tokyo Institutes for Advanced StudyThe University of TokyoKashiwaChiba 277-8583Japan Department of Astronomy Beijing Normal UniversityBeijing 100875China

Motivated by the determination of black hole masses with gravitational-wave observations,we calculate the evolution of massive stars through presupernova stages and obtain the mass distribution of black *** the first part,we calculate the evolution of He stars with masses of 30-120 M_(⊙).We study in detail how convective carbon shell burning controls pair-instability pulsations before and during oxygen burning and determine their final *** the second part,we calculate the evolution of H-rich stars with initial masses of 13-80 M_(⊙) until Fe core collapse and obtain the possible black hole mass range by applying the criterion of the compactness *** these models,we predict the mass distribution of black holes for stars that undergo Fe core collapse and pair-instability *** predicted masses for black holes range from 4.2 to 46 M_(⊙),which are consistent with the gravitational-wave observations.

关键词： gravitational waves-stars black holes-stars evolution-stars massive-(stars:)supernovae general

Characteristics structure analysis on debris cloud in the hypervelocity impact of disk projectile on thin plate

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Defence Technology（防务技术） 2020年第2期16卷 299-307页

作者： Chun-bo Zhang De-ning Di Xiao-wei Chen ken Wen State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China Institute of Systems Engineering China Academy of Engineering PhysicsMianyangSichuan621999China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing100081China

In this paper,the gauge points setting is introduced in the SPH simulation to analyze the debris cloud structure generated by the hypervelocity impact of disk projectile on thin *** with the experiments,more detailed information of the debris cloud structure can be classified from the numerical ***,due to the solitary dispersion and overlap display of the particles in the SPH simulation,accurate comparison between numerical and experimental results is difficult to be *** track the velocity and spatial distribution of the particles in the debris cloud induced from disk and plate,gauge points are locally set in the single-layer profile in the SPH *** analyzing the gauge points’spatial coordinate and velocity,the location and velocity of characteristic points in the debris cloud are *** boundary of debris cloud is achieved,as well as the fragments distribution outside the main structure of debris cloud.

关键词： Hypervelocity impact Debris cloud SPH method Particle gauge points Motion characteristics