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Synthesis of brookite-typed titania from titanium chloride solution

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Science China(Technological Sciences) 2009年第1期52卷 190-192页

作者： satoshi OKANO Saeki YAMAMURO Toshiro TANAKA Ehime University Matsuyama Ehime

The brookite-phase TiO{in2} was prepared by a hydrothermal synthesis of titanium chloride solution. The thermolysis time and the pH value of the solution were controlled during the synthesis. X-ray diffraction experiments showed that TiO{in2} powders partially containing the brookite-phase were successfully obtained. A great amount of OH{su\t-} in the reaction solution was found to be important to obtain the brookite phase because the intermediate complex leading to the brookite phase consumes more OH{su\t-} than other phases like the rutile.

关键词： brookite phase titanium chloride solution hydrothermal synthesis

Buckling Analysis of TF Coil Inner Leg for Central Solenoidless Tokamak

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Plasma Science and Technology 2006年第4期8卷 468-472页

作者：宋云涛杨庆喜 satoshi NISHIO Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China Department of Fusion Plasma Research Japan Atomic Energy Research InstituteNaka-machiNaka-gunIbaraki-ken 311-0193Japan

The central post is one of the critical components for the low aspect ratio tokamak, which endures not only a tremendous ohmic heating because it carries a rather high current, but also a large neutron heating and irradiation owing to the plasma operation. The DS copper alloy Glidcop AL-25[8] was chosen as the conductor material for its adequate mechanical properties and physics properties. The central post has a cylindrical structure with lots of cooling channels. The length of the central post for the next generation of nuclear fusion spherical tokamaks will be more than 10 m or 20 m. The structural stability is very crucial. When the applied load is larger than the structure critical buckling load, the device will lose its stability and collapse. In order to calculate the critical buckling load, a 1/6-segment finite element model was used and the force acting on the central post was simulated. The results showed that the vertical compressive stresses mainly affect the stability of the central post. The linear buckling analysis results with finite element method based on small deformation theory were given in this paper. The relation curves and functions for buckling factor, depending on the different lengths and the radius of the central post, the diameter of cooling channel and the maximum allowable current density, were also shown.

关键词： low aspect ratio tokamak toroidal field coil central post buckling analysis

Significant Deviations in the Configurations of Homologous Tandem Repeats in Prokaryotic Genomes

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Genomics, Proteomics & Bioinformatics 2009年第4期7卷 163-174页

作者： Shintaro Hirayama satoshi Mizuta Graduate School of Science and Technology Hirosaki University

We explored the possibilities of whole-genome duplication （WGD） in prokaryotic species, where we performed statistical analyses of the configurations of the central angles between homologous tandem repeats （TRs） on the circular chromosomes. At first, we detected TRs on their chromosomes and identified equivalent tandem repeat pairs （ETRPs）; here, an ETRP is defined as a pair of tandem repeats sequentially similar to each other. Then we carried out statistical analyses of the central angle distributions of the detected ETRPs on each circular chromosome by way of comparisons between the detected distributions and those generated by null models. In the analyses, we estimated a P value by a simulation using the Kullback-Leibler divergence as a distance measure between two distributions. As a result, the central angle distributions for 8 out of the 203 prokaryotic species showed statistically significant deviations （P〈0.05）. In particular, we found out the characteristic feature of one round of WGD in Photorhabdus luminescens genome and that of two rounds of WGD in Escherichia coli K12.

关键词： whole-genome duplication statistical analysis tandem repeat Kullback-Leibler divergence prokaryote

Up-grading of natural ilmenite ore by combining oxidation and acid leaching

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International Journal of Minerals,Metallurgy and Materials 2018年第7期25卷 729-736页

作者： Takehito Hiraki Yuichi Maruyama Yuta Suzuki satoshi Iloh Tetsuya Nagasaka Department of Metallurgy Graduate School of EngineeringTohoku UniversitySendai 980-8579Japan Toho Titanium Co. Ltd.Kanagawa 253-8510Japan Fanuc Co. Ltd.Oshino-muraYamanashi 401-0511Japan Before retirement:Graduate School of Environmental Studies Tohoku UniversitySendai 980-8579Japan

Rutile （TiO2） is heavily used in pigments mid colormlts, mid the most abundmlt source of rutile is ilmeinte. Upon oxidation of ilmeinte, mtile cml be formed wiffl modest energy consumption; furfflermore, after leaching, only a few byproducts are formed. Unfortunate- ly, one drawback is file necessarily long oxidative process of typically used mefflods. In fflis study, we show fflat a fluidized bed reactor cml be used to oxidize ilmeinte ore to rapidly form ruffle mid pseudobrookite （Fe2TiOs） phases. Ilmeinte was oxidized wiffl 5vo1% 02 in Ar at temperatures of 1173 K or 1223 K mid subsequently leached using a diluted H2SO4 solution to dissolve file pseudobrookite phase. The effects of acid concentration, temperature, mid cooling rate after oxidation were investigated. We show fflat file ilmeinte was rapidly oxidized to form rutile mid pseudobrookite phases at 1173 mid 1223 K in a 5vo1% O2/95vo1% Ar environment wifflin 40 min. The fmal maximum mtile yield was 84.2mo1% after leaching in （1 ＋ 1） H2SO4 solution at 393 K for 12 h.

关键词： ilmenite oxidation fluidized bed reactor acid leaching rutile pseudobrookite

Numerical Modelling and Simulation of Chemical Reactions in a Nano-Pulse Discharged Bubble for Water Treatment

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Plasma Science and Technology 2016年第9期18卷 924-932页

作者：何雨辰 satoshi UEHARA Hidemasa TAKANA Hideya NISHIYAMA Graduate school of Engineering Tohoku University Institute of Fluid Science Tohoku University

A zero-dimensional model to simulate a nano-pulse-discharged bubble in water was developed. The model consists of gas and liquid phases corresponding to the inside and outside of the bubble, respectively. The diffusions of chemical species from the gas to the liquid phase through the bubble interface was also investigated. The initial gas is Ar, but includes a little H20 and 02 in the bubble. The time evolution of the OH concentration in the liquid phase was mainly investigated as an important species for water treatment. It was shown that OH was generated in the bubble and then diffused into the liquid. With the application of a continuous nano-pulse discharge, more OH radicals were generated as the frequency increased at a low voltage for a given power consumption.

关键词： chemical reaction model water purification bubble discharge diffusion

Controllable multi-domain semantic artwork synthesis

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Computational Visual Media 2024年第2期10卷 355-373页

作者： Yuantian Huang satoshi Iizuka Edgar Simo-Serra Kazuhiro Fukui Department of Computer Science University of TsukubaTsukuba 305-8577Japan Department of Computer Science and Engineering Waseda UniversityTokyo 169-8050Japan

We present a novel framework for the multidomain synthesis of artworks from semantic *** of the main limitations of this challenging task is the lack of publicly available segmentation datasets for art *** address this problem,we propose a dataset called ArtSem that contains 40,000 images of artwork from four different domains,with their corresponding semantic label *** first extracted semantic maps from landscape photography and used a conditional generative adversarial network(GAN)-based approach for generating high-quality artwork from semantic maps without requiring paired training ***,we propose an artwork-synthesis model using domain-dependent variational encoders for high-quality multi-domain ***,the model was improved and complemented with a simple but effective normalization method based on jointly normalizing semantics and style,which we call spatially style-adaptive normalization(SSTAN).Compared to the previous methods,which only take semantic layout as the input,our model jointly learns style and semantic information representation,improving the generation quality of artistic *** results indicate that our model learned to separate the domains in the latent ***,we can perform fine-grained control of the synthesized artwork by identifying hyperplanes that separate the different ***,by combining the proposed dataset and approach,we generated user-controllable artworks of higher quality than that of existing approaches,as corroborated by quantitative metrics and a user study.

关键词： semantic artwork synthesis generative adversarial network(GAN) datasets non-photorealistic rendering

Osteoblast compatibility of 3D printed Co-Cr-Mo alloys with different building direction

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Biosurface and Biotribology 2019年第2期5卷 67-70页

作者： satoshi Migita Kosuke Sakashita Suyalatu Graduate School of Science and Engineering Yamagata University4-3-16 JonanYonezawaYamagataJapan NTT Data Engineering Systems Corporation AM Design Lab 2-6-58 SenbahigashiMinooOsakaJapan

Three-dimensional(3D)metal printing is an attractive technique for fabricating biomedical *** microstructures and mechanical properties of the fabricated 3D metal printed products show anisotropy because the grains grow along the z-axis ***,the effects of different printing directions on the cytocompatibility of the products are *** the present study,cobalt-chromium-molybdenum(Co-Cr-Mo)alloy cylinders were fabricated along the z-axis(vertical)and x-axis(horizontal),respectively,and the effect of build direction on the cytocompatibility was *** build direction of 3D printed Co-Cr-Mo alloy changed grain anisotropy;however,there was no statistical difference in grain *** wettability,protein adsorption,cell attachment,and cell proliferation on the disks of vertical and horizontal products were similar to those on cast alloy;they were significantly lower than those of commercially pure titanium and tissue culture *** build direction of 3D printed Co-Cr-Mo alloy does not affect osteoblast compatibility.

关键词： alloy grain alloys

Influence of automated driving on driver’s own localization:a driving simulator study

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Journal of Intelligent and Connected Vehicles 2018年第3期1卷 99-106页

作者： Ryuichi Umeno Makoto Itoh satoshi Kitazaki University of Tsukuba IbarakiJapan National Institute of Advanced Industrial Science and Technology Tsukuba CenterTsukuba CentralIbarakiJapan

Purpose–Level 3 automated driving,which has been defined by the Society of Automotive Engineers,may cause driver drowsiness or lack of situation awareness,which can make it difficult for the driver to recognize where he/she ***,the purpose of this study was to conduct an experimental study with a driving simulator to investigate whether automated driving affects the driver’s own localization compared to manual ***/methodology/approach–Seventeen drivers were divided into the automated operation group and manual operation *** in each group were instructed to travel along the expressway and proceed to the specified *** automated operation group was forced to select a course after receiving a Request to Intervene(RtI)from an automated driving ***–A driver who used the automated operation system tended to not take over the driving operation correctly when a lane change is immediately required after the ***/value–This is a fundamental research that examined how the automated driving operation affects the driver's own *** experimental results suggest that it is not enough to simply issue an RtI,and it is necessary to tell the driver what kind of circumstances he/she is in and what they should do next through the *** conclusion can be taken into consideration for engineers who design automatic driving vehicles.

关键词： Automated vehicles Autonomous driving Advanced driver assistant systems Driver behaviors and assistance Human-machine interfaces Request to intervene

Image of Ne Trap by a Microwave Cavity

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Chinese Physics Letters 1997年第2期14卷 93-95页

作者： XU Lei satoshi Oishi Kazuko Shimizu Hiroshi Takuma Fujio Shimizu Department of Physics Fudan UniversityShanghai 200433 Institute for Laser Science The University of Electro-communicationsChofugaokaChofushiTokyo 182Japan Department of Applied Physics University of TokyoBunkyo-kuTokyo 113Japan

The focusing of Ne metastable atoms trapped in magnetic-optical trap by a microwave cavity was *** cavity was operated at TM010 *** a microwave power of 14W,the Ne trap was imaged to a spot of about 0.25mm(full width ... 详细信息

关键词： microwave Microwave cavity