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Journal of Applied Mathematics and Physics 2021年第5期9卷 1171-1179页

作者： Satoshi Iwakami Masahiko Tamega Masahide Sanada michiaki mohri Yoshitaka Iwakami Naoki Okamoto Ryousuke Asou Shuji Jimbo Masaji Watanabe Earth Rise Company Inc. Okayama Japan Visiting Researcher Okayama University Okayama Japan Specially Appointed Professor Okayama University Okayama Japan

This study focuses on change of topography in a water area. Output data from a GPS unit and an echo sounder data were incorporated into analysis for construction of underwater topography. Comparison of two data sets ... 详细信息

关键词： Underwater Topography RTK-GPS Echo Sounder

Study on Change of Topography in Water Area with Field Measurement

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Study on Change of Topography in Water Area with Field Measu...

Mathematical Modeling and Computational Analysis of Underwater Topography with Global Positioning and Echo Sounder Data

作者： Satoshi Iwakami Masahiko Tamega Masahide Sanada michiaki mohri Yoshitaka Iwakami Naoki Okamoto Shuji Jimbo Masaji Watanabe Earth Rise Company Inc. Okayama University

Disastrous flood events in recent years include 2018 Japan floods（July 2018）,Typhoon 19（Hagibis, October 2019） and the following heavy rain event, and July 2020 heavy rain disaster. Such disastrous flood events are expected to occur more frequently as the climate change progresses, and it is indispensable to update information regarding water areas such as rivers, reservoirs, and coastal waters. This study demonstrates practical techniques to analyze underwater topography. Longitude and latitude components of ellipsoidal data recorded by a GPS receiver are projected to a rectangular coordinate system,and results are combined with vertical components including data recorded by an echo sounder unit so that tracks on an underwater floor are obtained. A mapping on a finite dimensional space of continuous functions over a triangular mesh is formulated, and its fixed point gives rise to an underwater floor that fits the tracks. Our techniques are illustrated with data obtained in measurement conducted in a reservoir called Kojima Lake located in Okayama Prefecture, Japan.

关键词： Underwater Topography RTK-GPS Echo Sounder Triangular Mesh Fixed Point Iteration

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Mathematical Modeling and Computational Analysis of Underwat...

朱熹的“知”与阳明的“知”──心性论脉络的“格物致知”诠释

作者： Satoshi Iwakami Masahiko Tamega Masahide Sanada michiaki mohri Yoshitaka Iwakami Naoki Okamoto Ryousuke Asou Shuji Jimbo Masaji Watanabe Earth Rise Company Inc. Visiting Researcher Okayama University Specially Appointed Professor Okayama University

关键词： Underwater Topography RTK-GPS Echo Sounder

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中山大学学报（社会科学版） 2024年第2期64卷 186-197页

作者： [日]藤井伦明日本九州大学人文科学研究院

历来学界对朱熹“格物致知”论的理解并不一致。有“认识论”脉络的诠释,也有“心性论”脉络的诠释。在朱熹“格物致知”论中,“格物”的第一阶段是以外在事物为对象而究明“所当然之则”的工夫,所以确实可以从“认识论”脉络解读它;但... 详细信息

历来学界对朱熹“格物致知”论的理解并不一致。有“认识论”脉络的诠释,也有“心性论”脉络的诠释。在朱熹“格物致知”论中,“格物”的第一阶段是以外在事物为对象而究明“所当然之则”的工夫,所以确实可以从“认识论”脉络解读它;但到了究明“所以然之故”的第二阶段,外物之理与内心之理相通,“格物”成为“知性”,因此无法单纯地将它规定为现代认识论脉络的“求知”活动。关于“致知”,其工夫的对象、舞台不是外在物理,而是内在心理,因此无法从认识论脉络解读它。朱熹所理解的“知”是人心先天具有的本体之性(理)展现为作用之情的灵妙机能,换言之,即“明德”或“良知”。因此,关于“知”的基本意涵以及“知至”的境界,可以说朱熹与阳明的理解是一致的。吾人不能轻易地将朱熹脉络的“格物致知”与阳明脉络的“致良知”视为完全对立、矛盾的工夫。

关键词：朱熹王阳明格物致知认识论知识心性论理

Deviation of congruent composition in Fe-Pd system

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Rare Metals 2006年第5期25卷 393-398页

作者： Tetsuo mohri Daisuke Hamajima Ying Chen Division of Materials Science and Engineering Graduate School of Engineering Hokkaido University Kita-13 Nishi-8 Kita-ku Sapporo 060-8628Japan Department of Quantum Engineering and System Science Graduate School of Engineering University of Tokyo Hongo 7-3-1 Bunkyo-ku Tokyo113-8656 Japan

The first-principles calculation of the disordered Ll0 phase boundary for the Fe-Pd system is attempted by combining the FLAPW electronic structure total energy calculations and the cluster variation method via the cluster expansion method. The lattice vibration effects are taken into account based on the Debye-Gruneisen model within quasi-harmonic approximation. The transition temperature is reproduced with very high accuracy. However, the experimental congruent composition of disordered L10 phase that significantly deviates from 1.＂ 1 stoichiometry is not reproduced. Fulther calculations are attempted based on the phenomenological Lennard-Jones type pair potential, which is capable of introducing both tetragonality of the Ll0 ordered phase and additional configurational freedom because of the magnetic spins. The prelimi- nary calculations indicate that the tetragonality enhances the stability of the L10 ordered phase and the magnetic contributions also change the transition temperature. Despite these findings, the shift of the congruent composition still remains as a subject that needs further research. The electronic origin of the shifting of the congruent composition is briefly discussed.

关键词： Fe-Pd alloy system order-disorder phenomena phase diagrams ab initio calculation

First-principles calculation of phase equilibria and phase separation of the Fe-Ni alloy system

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Rare Metals 2006年第5期25卷 437-440页

作者： Ying Chen Shuichi Iwata Tetsuo mohri Department of Quantum Engineering and System Science School of Engineering The University of Tokyo Hongo 7-3-1 Bunkyo-ku Tokyo113-8656 Japan Graduate School of Frontier Sciences The University of Tokyo Hongo 7-3-1 Bunkyo-ku Tokyo 113-8656 Japan Division of Materials Science and Engineering Graduate School of Engineering Hokkaido University Kita-13 Nishi-8 Kita-ku Sapporo060-8628 Japan

Theoretical investigation of the phase equilibria of the Fe-Ni alloy has been performed by combining the FLAPW total energy calculations and the Cluster Variation Method through the Cluster Expansion Method. The calculations have proved the stabilization of the LIE phase at 1：3 stoichiometry, which is in agreement with the experimental result, and predicted the existence of L1 0 as a stable phase below 550 K; this L1 0 phase has been missing in the conventional phase diagram. The calculations are extended to the Fe-rich region that is characterized by a wide range phase separation and has drawn considerable attention because of the intriguing Invar property associated with a Fe concentration of 65%. To reveal the origin of the phase separation, a P-V curve in an entire concentration range is derived by the second derivative of free energy functional of the disordered phase with respect to the volume. The calculation confirmed that the phase separation is caused by the breakdown of the mechanical-stability criterion. The newly calculated phase separation line combined with the L1 0 and L12Eorder-disordered phase boundaries provides phase equilibria in the wider concentration range of the system. Furthermore, a coefficient of thermal expansion （CTE） is attempted by incorporating the thermal vibration effect through harmonic approximation of the Debye-Gruneisen model. The Invar behavior has been reproduced, and the origin of this anomalous volume change has been discussed.

关键词： Fe-Ni alloy system order-disorder separation magnetism first-principles calculations cluster variation method cluster expansion method Debye-Gruneisen model

Inherited multimodal microstructure evolution of high-fracture-toughness Mg-Zn-Y-Al alloys during extrusion for the consolidation of rapidly solidified ribbons

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Journal of Magnesium and Alloys 2022年第9期10卷 2433-2445页

作者： Soya Nishimoto michiaki Yamasaki Yoshihito Kawamura Department of Materials Science Graduate School of Science and TechnologyKumamoto University2-39-1 KurokamiChuo-kuKumamoto 860-8555Japan Magnesium Research Center Kumamoto University2-39-1 KurokamiChuo-kuKumamoto 860-8555Japan

The mechanisms of multimodal microstructure evolution and the effects of microstructural factors on mechanical properties must be elucidated to design new alloys with superior *** this study,high-fracture-toughness and ductile Mg_(96.75)Zn_(0.85)Y_(2.05)Al_(0.35) alloys were developed using rapidly solidified(RS)ribbon-consolidation technique,and the inherited multimodal microstructure evolution during plastic flow consolidation of the RS ribbons was *** use of extrusion for plastic flow consolidation of the heat-treated RS ribbons produced a multimodal microstructure consisting of the worked grains with high Kernel average misorientation(KAM)angles(Group1),the ultrafine dynamically recrystallized(DRXed)grains with intermediate KAM angles(Group 2),and the fine DRXed grains with low KAM angles(Group 3).Groups 1 and 2 contribute to the alloy strengthening,while Group 3 contributes to improving ductility with strainhardening,resulting in enhancement of the fracture *** form the multimodal microstructure,it was necessary to apply plastic flow with equivalent strains of>2.3 to the heat-treated RS ribbons possessing duplex microstructures with different dispersions of the long-period stacking ordered phase.

关键词： Magnesium alloy Long-period stacking ordered phase Multimodal microstructure Rapid solidification Extrusion Dynamic recrystallization

Three-dimensional machining of insulating ceramics materials with electrical discharge machining

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中国有色金属学会会刊：英文版 2009年第B9期19卷 150-156页

作者： Yasushi FUKUZAWA Naotake mohri Hiromitsu GOTOH Takayuki TANI Department of Mechanical Engineering Nagaoka University of Technology Department of Precision Engineering The University of Tokyo Department of Industrial Information Tsuku ba University of Technology

The insulating ceramics were processed with sinking and wire cut electrical discharge machining(EDM). The new technology was named as the assisting electrode method. In the machining, the electrical conductive material was adhered on the surface of insulating workpiece as the starting point of electrical discharge. As the processing operated in oil, the electrical conductive product composed of decomposition carbon element from working oil adhered on the workpiece during discharge. The discharges generated continuously with the formation of the electrical conductive layer. So, the insulating ceramics turn to the machinable material by EDM. We introduced the mechanism and the application of the machining of insulating ceramics such as Si3N4 and ZrO2.

关键词：绝缘陶瓷放电加工三维加工陶瓷材料工件表面导电材料机械加工分解过程

Endoscopic enucleation of gastrointestinal stromal tumors of the stomach: Report of five cases

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World Journal of Gastroenterology 2008年第16期14卷 2609-2611页

作者： Toshio Katoh Yoshiyuki Itoh Tomomi mohri Hiroshi Suzuki Division of Surgery Toyama Hospital

Gastrointestinal stromal tumor (GIST) of the stomach was treated by endoscopic enucleation in five patients. They were three men and two woman, aged 36-56 years. Tumors located in the cardia were completely enucleated endoscopically without any serious complication. The largest diameter of removed tumors ranged from 1.2 to 2.5 cm. Histopathological diagnosis was GIST with low risk of malignancy (mitotic index < 5/50 high power field) in all cases. The patients were disease-free for 10.5-42.2 mo after endoscopic enucleation.

关键词： Gastrointestinal stromal tumor Endoscopicenucleation Stomach

Blockchain-based cross-domain authorization system for user-centric resource sharing

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Blockchain(Research and Applications) 2023年第2期4卷 67-81页

作者： Yuki Ezawa Shohei Kakei Yoshiaki Shiraishi Masami mohri Masakatu Morii Department of Electrical and Electronic Engineering Kobe UniversityKobeHyogo657-8501Japan Department of Computer Science Nagoya Institute of TechnologyNagoyaAichi466-8555Japan Faculty of Informatics Kindai UniversityHigashi-OsakaOsaka577-8502Japan

User-centric data sharing is essential to encourage citizens'active participation in the digital *** key to smart cities,a form of the digital economy,is the promotion of public use of citizen ***,it is not easy to utilize data without citizens’*** this study,we took a technological approach to these *** access(UMA)is a well-known framework for delegating resource access rights to others on the *** UMA,authorization mechanisms are designed to be centralized so that resource owners can centrally manage access rights for various resources stored in different ***,the lack of transparency in the authorization mechanism is a barrier to its implementation in large-scale systems such as smart *** this study,we developed a blockchain-based cross-domain authorization architecture that enables a resource-sharing ecosystem in which organizations that wish to utilize data can freely trade with each *** proposed architecture solves the transparency problem that conventional authorization systems have had by designing the authorization mechanism on blockchain *** implemented the proposed architecture as smart contracts and evaluated its processing *** resultant time required for delegating access rights and accessing resources was less than 500 ***,we found that the fluctuation in the processing time overhead was *** on these results,we concluded that performance degradation with the proposed architecture is minor.

关键词： Access control Authorization Blockchain Hyperledger fabric User-managed access