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CT-TDLAS测量燃烧火焰二维温度分布

光子学报 2019年第12期48卷 47-55页

作者：周王峥王珍珍严俊杰张丹辻本一真神本崇博出口祥啓西安交通大学多相流国家重点实验室西安710049 德岛大学大学院社会产业理工学研究部日本德岛770-8506

结合可调谐半导体激光吸收光谱技术与计算机断层扫描技术,通过获得与实验值最适应的拟合光谱,重构本生灯燃烧火焰二维温度分布.以零均值归一化互相关和误差平方和作为指标,分析了32路测量组件的二维重构精度.结果表明,零均值归一化互相... 详细信息

结合可调谐半导体激光吸收光谱技术与计算机断层扫描技术,通过获得与实验值最适应的拟合光谱,重构本生灯燃烧火焰二维温度分布.以零均值归一化互相关和误差平方和作为指标,分析了32路测量组件的二维重构精度.结果表明,零均值归一化互相关达到0.994,误差平方和达到0.00086.采用32路测量系统实现了本生灯火焰二维温度的测量,并与热电偶测量结果进行对比.结果表明,两者之间的温度分布趋势相同,可调谐半导体激光吸收光谱测量具有更高的精度和分辨率,验证了可调谐半导体激光吸收光谱技术结合计算机断层扫描技术在测量二维火焰温度分布的可行性与精确性.

关键词：光谱学可调谐半导体激光吸收光谱计算机断层诊断术燃烧火焰二维温度分布

带压燃烧场2D温度分布的激光吸收光谱测量初步研究

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推进技术 2021年第9期42卷 2129-2137页

作者：周王峥王珍珍严俊杰种道彤辻本一真神本崇博出口祥啓西安交通大学能源与动力工程学院多相流国家重点实验室陕西西安710049 德岛大学大学院社会产业理工学研究部德岛县德岛770-8506

以实现冲压发动机等场合的高压燃烧流场诊断为目标,采用可调谐半导体激光吸收光谱(TDLAS)技术对带压燃烧流场的温度诊断进行初步研究。使用一种光谱耦合的CT重构方法,以误差平方和与零均值归一化互相关作为评价指标分析CT-TDLAS的重构... 详细信息

以实现冲压发动机等场合的高压燃烧流场诊断为目标,采用可调谐半导体激光吸收光谱(TDLAS)技术对带压燃烧流场的温度诊断进行初步研究。使用一种光谱耦合的CT重构方法,以误差平方和与零均值归一化互相关作为评价指标分析CT-TDLAS的重构精度。搭建带压燃烧腔温度分布测量的实验系统,使用压力传感器和CCD相机记录带压点火燃烧过程变化;使用调谐范围为1335~1375nm宽波段输出的半导体激光,对燃烧腔内带压点火燃烧过程进行了时间分辨的二维温度分布重建。实验结果表明:CT-TDLAS具有较高的重构精度;燃烧过程的压力变化趋势、火焰变化趋势及时间分辨二维温度分布变化趋势,三者保持一致;在带压条件下,CT-TDLAS可以实现高分辨率的时间分辨温度测量,反应定量的温度分布变化信息,为带压及进一步的高温高压燃烧流场的诊断提供帮助。

关键词：带压燃烧场可调谐半导体激光吸收光谱计算机断层扫描二维温度分布时间分辨

The 5αcondensate state in 20Ne

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Nuclear Science and Techniques 2024年第2期35卷 3-5页

作者： takahiro Kawabata Department of Physics Osaka UniversityToyonakaOsaka 560-0043Japan

Theclustering phenomenon,in which nucleons are arranged intoparticles(4 He nuclei)within a nuclear system,is one of the most intriguing aspects of nuclear *** has been observed in various light nuclei,such as^(8)Be,^(12)C,^(16)O,and^(20)Ne,and is responsible for many exotic and fascinating phenomena,such as the Hoyle state in^(12)C,which plays an essential role in stellar nucleosynthesis[1-6]as well as in heavy-ion collisions[7-9].

关键词： structure state

Simple and robust 3D MINFLUX excitation with a variable phase plate

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Light(Science & Applications) 2024年第7期13卷 1354-1363页

作者： takahiro Deguchi Jonas Ries European Molecular Biology Laboratory Cell Biology and BiophysicsHeidelbergGermany. Max Perutz Labs Vienna Biocenter Campus(VBC)ViennaAustria. University of Vienna Center for Molecular BiologyDepartment of Structural and Computational BiologyViennaAustria. University of Vienna Faculty of PhysicsViennaAustria

MINFLUX has achieved extraordinary resolution in superresolution imaging and single fluorophore *** is based on localizing single fluorophores by rapid probing with a patterned beam that features a local intensity *** implementations,however,are complex and expensive and are limited in speed and ***,we show that a combination of an electro-optical modulator with a segmented birefringent element such as a spatial light modulator produces a variable phase plate for which the phase can be scanned on the MHz *** or top-hat phase patterns generate high-contrast compact excitation point-spread functions for MINFLUX localization in the x,y,and z-direction,respectively,which can be scanned across a fluorophore within a microsecond,switched within 60 microseconds and alternated among different excitation *** discuss how to compensate for non-optimal performance of the components and present a robust 3D and multi-color MINFLUX excitation module,which we envision as an integral component of a high-performance and cost-effective open-source MINFLUX.

关键词： excitation phase switched

K-theory of Continuous Deformations of C＊-algebras

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Acta Mathematica Sinica,English Series 2007年第7期23卷 1337-1340页

作者： takahiro SUDO Department of Mathematical Sciences Faculty of ScienceUniversity of the RyukyusNishiharaOkinawa 903-0213Japan

We study K-theory of continuous deformations of C＊-algebras to obtain that their K-theory is the same as that of the fiber at zero. We also consider continuous or discontinuous deformations of Cuntz and Toeplitz alge... 详细信息

关键词： C*-algebra continuous field K-theory deformation

A converse of Hormander's L^(2)-estimate and new positivity notions for vector bundles

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Science China Mathematics 2021年第8期64卷 1745-1756页

作者： Genki Hosono takahiro Inayama Mathematical Institute Tohoku UniversitySendai 980-8578Japan Graduate School of Mathematical Sciences The University of TokyoTokyo 153-8914Japan

We study conditions of Hormander's L^(2)-estimate and the Ohsawa-Takegoshi extension *** a twisted version of the Hormander-type condition,we show a converse of Hormander's L^(2)-estimate under some regularity assumptions on an n-dimensional *** result is a partial generalization of the one-dimensional result obtained by Berndtsson(1998).We also define new positivity notions for vector bundles with singular Hermitian metrics by using these *** investigate these positivity notions and compare them with classical positivity notions.

关键词： L^(2)-estimate singular Hermitian metrics Ohsawa-Takegoshi L^(2)-extension theorems

POLYMER COLLOIDS FORMED BY POLYELECTROLYTE COMPLEXATION OF VINYL POLYMERS AND POLYSACCHARIDES IN AQUEOUS SOLUTION

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Chinese Journal of Polymer Science 2013年第1期31卷 39-49页

作者： Hui-dan Liu takahiro Sato Department of Macromolecular Science Osaka University

The polyelectrolyte complex formed from the polyanion and polycation was studied by turbidimetry, static and electrophoretic light scattering, and elementary analysis. Sodium salts of polyacrylate （PA） and heparin （Hep） were chosen as the polyanion, and hydrochloric salts of poly（vinyl amine）（PVA） and chitosan （Chts） as the polycation. Although these vinyl polymers and polysaccharides have remarkably different backbone chemical structures and linear charge densities, all the four combinations PA-PVA, PA-Chts, Hep-PVA, and Hep-Chts provide almost stoichiometric polyelectrolyte complexes which are slightly charged owing to the adsorption of the excess polyelectrolyte component onto the neutral complex. The charges stabilize the complex colloids in aqueous solution of a non-stoichiometric mixture, and the aggregation number of the complex colloids increases with approaching to the stoichiometric mixing ratio. The mixing ratio dependence of the aggregation number for the four complexes is explained by the model proposed in the previous study.

关键词： Polyelectrolyte complex Colloidal dispersion Polyacrylate Poly(vinyl amine) Heparin Chitosan Lightscattering.

Study on dynamic response of embedded long span corrugated steel culverts using scaled model shaking table tests and numerical analyses

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第3期7卷 430-435页

作者：车爱兰 IWATATE takahiro 葛修润 School of Naval Architecture Ocean and Civil Engineering Shanghai Jiao Tong University Shanghai 200030 China Civil and Environmental Engineering Tokyo Metropolitan University Tokyo 192-0397 Japan

A series of scaled-model shaking table tests and its simulation analyses using dynamic finite element method were performed to clarify the dynamic behaviors and the seismic stability of embedded corrugated steel culverts due to strong earth-quakes like the 1995 Hyogoken-nanbu earthquake. The dynamic strains of the embedded culvert models and the seismic soil pressure acting on the models due to sinusoidal and random strong motions were investigated. This study verified that the cor-rugated culvert model was subjected to dynamic horizontal forces (lateral seismic soil pressure) from the surrounding ground, which caused the large bending strains on the structure; and that the structures do not exceed the allowable plastic deformation and do not collapse completely during strong earthquake like Hyogoken-nanbu earthquake. The results obtained are useful for design and construction of embedded long span corrugated steel culverts in seismic regions.

关键词： Embedded corrugated steel culverts Shaking table tests Hyogoken-nanbu earthquake Dynamic analyses

Activity coefficients of NiO and CoO in CaO–Al_2O_3–SiO_2 slag and their application to the recycling of Ni–Co–Fe-based end-of-life superalloys via remelting

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International Journal of Minerals,Metallurgy and Materials 2017年第1期24卷 25-36页

作者： Xin Lu takahiro Miki Tetsuya Nagasaka Graduate School of Engineering Tohoku University

To design optimal pyrometallurgical processes for nickel and cobalt recycling, and more particularly for the end-of-life process of Ni-Co-Fe-based end-of-life（EoL） superalloys, knowledge of their activity coefficients in slags is essential. In this study, the activity coefficients of NiO and CoO in CaO-Al_2O_3-SiO_2 slag, a candidate slag used for the EoL superalloy remelting process, were measured using gas/slag/metal equilibrium experiments. These activity coefficients were then used to consider the recycling efficiency of nickel and cobalt by remelting EoL superalloys using CaO-Al_2O_3-SiO_2 slag. The activity coefficients of NiO and CoO in CaO-Al_2O_3-SiO_2 slag both show a positive deviation from Raoult＇s law, with values that vary from 1 to 5 depending on the change in basicity. The activity coefficients of NiO and CoO peak in the slag with a composition near B =（%CaO）/（%SiO_2） = 1, where B is the basicity. We observed that controlling the slag composition at approximately B = 1 effectively reduces the cobalt and nickel oxidation losses and promotes the oxidation removal of iron during the remelting process of EoL superalloys.

关键词： recycling nickel cobalt end-of-life superalloys activity coefficients remelting slag