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A Proposal of a Spline Filter that Achieves Both Robustness and Lower Compatibility

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Nanomanufacturing and Metrology 2021年第2期4卷 77-85页

作者： yuki Kondo Munetoshi Numada Keiya takahashi Ichiro Yoshida Hiroyasu Koshimizu HOSEI University 3-7-2 Kajino-choKoganei-shiTokyo184-8584Japan Chukyo University 101-2 Yagotohonmati Showa-kuNagoyaAichi466-8666Japan YYC Solution 3-102-3F Kamiyashiro Meito-kuNagoyaAichi465-0025Japan

A spline filter is used to extract roughness profiles for the measurement of surface texture and is useful when sufficient sections before and after a primary profile could not be *** is because a spline filter could prevent the end effect,which is the fluctuation of output data that occurs around both ends of the primary profile and depends on the width of the weighting function of a *** spline filter is based on the calculation of an inverse matrix instead of the convolution of the weighting function of the *** input data include outliers,the output of a spline filter greatly *** solve this problem,we propose a robust spline ***,output of the robust spline is not in agreement with that of the spline filter when input data do not include ***,the robust spline filter has no lower *** this paper,the"Fast M-estimation Spline Filter(FMSF)"is *** uses the fast M-estimation *** performs robust to input data including outliers,and gives the same output as that of general spline filters to input data without *** value estimated by this method is in agreement with that estimated by the least squares method if no outlier *** order to apply the fast M-estimation method to the spline filter,convolution of weight function is used instead of the inverse *** the input geometry with shear and point-symmetric extensions is pre-processed to prevent the end effect.

关键词： Surface roughness Spline filter Robustness Lower compatibility End effect M-estimation method

Study of the Effect of Acetic Acid and Phosphate on Copper Corrosion by Immersion Tests

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Materials Sciences and Applications 2024年第1期15卷 15-23页

作者： Yuna Yamaguchi Kaho Sugiura Toyohiro Arima Fuka takahashi Itaru Ikeda Yutaka Yamada Osamu Sakurada Department of Chemistry and Biomolecular Science Faculty of Engineering Gifu University Gifu Japan Dai-Dan Co. Ltd. Saitama Japan Daiwa Techno Co. Ltd. Gifu Japan

It was reported that hemispheric corrosion occurred in copper tubes in an acetic acid environment. When hemispheric corrosion occurred, corrosion could easily progress if water then flowed into the copper pipe, and countermeasures were needed. Therefore, we studied the copper corrosion caused by acetic acid. The present work investigated the relationship between the corrosion form of copper and acetic acid concentration using phosphorous-deoxidized copper, and reported that hemispherical corrosion was observed at acetic acid concentrations of 0.01 to 1 vol.% (0.002 to 0.2 mol·L-1) in the immersion test. In this study, the effects of acetic acid and phosphate on copper corrosion were examined using oxygen-free copper in immersion tests. The results suggested that different concentrations of phosphate in acetic acid solutions and the presence or absence of acetic acid and phosphate affected the corrosion of copper, resulting in different corrosion forms and corrosion progress.

关键词： Acetic Acid Phosphate Oxygen-Free Copper Hemispherical Corrosion Ant-Nest Corrosion

Round Robin Study on the Thermal Conductivity/Diffusivity of a Gold Wire with a Diameter of 30μm Tested via Five Measurement Methods

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Journal of Thermal Science 2022年第4期31卷 1037-1051页

作者： ABE Ryo SEKIMOTO yuki SAINI Shirkant MIYAZAKI Koji LI Qin-Yi LI Dawei takahashi Koji YAGI Takashi NAKAMURA Masakazu division of materials science nara institute of science and technologyikoma 630-0192japan department of mechanical and control engineering kyushu institute of technologykitakyushu 804-8550japan department ofaeronautics and astronautics kyushu universityfukuoka819-0395japan international institute for carbon-neutral energy research(wpi-i2cner) kyushu universityfukuoka 819-0395japan national metrology institute of japan national institute of advanced industrial science and technology tsukuba 305-8565japan

Since first establishing thermal measurement techniques for micrometer-scale wires,various methods have been devised and improved ***,the uncertainty of different measurements on the same sample has not yet been *** this work,a round robin test was performed to compare the thermal conductivity and thermal diffusivity measurement methods for a fine metal *** tested material was a pure gold wire,with a diameter of 30μ*** wire was cut into certain lengths and distributed to four institutions using five different measurement methods:the direct current(DC)self-heating method,the DC heating T-type method,the 3ωmethod for thermal conductivity,the scanning laser heating alternating current(AC)method,and the spot periodic heating radiation thermometry method for thermal *** completing the measurements,the reported thermal conductivity and thermal diffusivity at room temperature,i.e.,317 W·m^(-1)·K^(-1)and 128×10^(-6)m^(2)·s^(-1),respectively,were adopted as references for comparison with the measurement *** advantages and disadvantages of each method are described in terms of the effect of electrical and thermal junctions fabricated on a wire,such as an electrode,a thermocouple,and a heat *** knowledge obtained from the tested methods will be useful for selecting and designing a measurement technique for various wire-like materials.

关键词： thermal conductivity thermal diffusivity round robin test microscale wire

Phosphorus Transfer in the Ash through Acid or AlkaliExtraction Processes

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材料科学与工程（中英文A版） 2020年第1期10卷 24-29页

作者： Masaaki takahashi yukimasa Takemoto Eiji yuki Yokkaichi University Research Laboratory on Environmental TechnologyKayo-cho 1200YokkaichiMieJapan Mie Chuo Kaihatsu Co. LtdHachiya 4713YonoIgaMie 518-1152Japan

In order to find the best method of the phosphorus recovery, some kinds of the phosphorus recovery methods were applied using the same raw material. The acid treatment shows the highest recovery performance, on the contrary, the alkali treatment indicates the lowest recovery rate. The recovery rate was improved by the application of the heat treatment or hydrothermal method. In the acid treatment, the recovered phosphorus is mainly composed of aluminum phosphate, conversely, in alkali treatment, recovered phosphorus was mainly composed of sodium phosphate containing a small amount of aluminum. But the aluminum content in the phosphorus decreased by introduction of the heat treatment or hydrothermal method.

关键词： Phosphorus recovery rate sewage sludge extraction method.

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发射市场的客户为何离不开SpaceX

商业周刊（中文版） 2024年第1期 16-17页

作者： Bruce Einhorn Shinhye Kang Heejin Kim Nicholas takahashi 融汐(译) 不详

海伦·休比(Helene Huby)想在欧洲太空历史上留下一笔。作为可重复使用太空舱开发商Exploration Co.的首席执行官,她帮助自己的初创公司在2022年赢得了阿丽亚娜6号(Ariane6)上的一个便宜位置。阿丽亚娜6号是欧洲打算匹敌马斯克旗下Space... 详细信息

海伦·休比(Helene Huby)想在欧洲太空历史上留下一笔。作为可重复使用太空舱开发商Exploration Co.的首席执行官,她帮助自己的初创公司在2022年赢得了阿丽亚娜6号(Ariane6)上的一个便宜位置。阿丽亚娜6号是欧洲打算匹敌马斯克旗下SpaceX公司系列火箭的产品。

关键词：初创公司阿丽亚娜首席执行官 Hub 开发商

Collapse Behavior of Pipe-Framed Greenhouses with and without Reinforcement under Snow Loading:A 3-D Finite Element Analysis

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Journal of Civil Engineering and Architecture 2024年第2期18卷 51-59页

作者： Yasushi Uematsu Kazuya takahashi New Industry Creation Hatchery Center Tohoku UniversitySendai 980-8579Japan Engineering Headquarters Shimizu CorporationChuo-kuTokyo 104-8370Japan

The present paper first investigates the collapse behavior of a conventional pipe-framed greenhouse under snow loading based on a 3-D finite element analysis,in which both geometrical and material non-linearities are *** snow load distribution patterns related to the wind-driven snow particle movement are used in the *** is found that snow load distribution affects the deformation and collapse behavior of the pipe-framed greenhouse *** results obtained in this study are consistent with the actual damage ***,discussion is made of the effects of reinforcements by adding members to the basic frame on the strength of the whole structure,in which seven kinds of reinforcement methods are examined.A buckling analysis is also carried *** results indicate that the most effective reinforcement method depends on the snow load distribution pattern.

关键词： Pipe-framed greenhouse snow loading collapse buckling finite element analysis

Ultrasonic echo signal fetures of dissimilar material bonding joints

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中国有色金属学会会刊：英文版 2004年第6期14卷 1050-1054页

作者：刚铁 Yasuo takahashi State Key Lab of Advanced Welding Production Technology Harbin Institute of Technology Harbin 150001 China JWRI Osaka University Japan

An ultrasonic evaluation method of echo feature of diffusion bond joint between two dissimilar materials is presented. The echo signal was acquired by an automatic ultrasonic C-scan test system. It is found that the intensity of echo and its phase can be used to evaluate the joint quality, and interface products of dissimilar materials bonding can be evaluated by ultrasonic method.

关键词：超声波测试异金属扩散结合非破坏性演化

Prognosis of ulcerative colitis differs between patients with complete and partial mucosal healing, which can be predicted from the platelet count

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World Journal of Gastroenterology 2014年第48期20卷 18367-18374页

作者： Asuka Nakarai Jun Kato Sakiko Hiraoka Toshihiro Inokuchi Daisuke Takei yuki Moritou Mitsuhiro Akita Sakuma takahashi Keisuke Hori Keita Harada Hiroyuki Okada Kazuhide Yamamoto Department of Gastroenterology and Hepatology Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences Okayama 700-8558 Japan Second Department of Internal Medicine Wakayama Medical University Wakayama 641-0012 Japan Department of Endoscopy Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences Okayama 700-8558 Japan

AIM: To determine the difference in clinical outcome between ulcerative colitis (UC) patients with Mayo endoscopic subscore (MES) 0 and those with MES 1.

关键词： Ulcerative colitis Mucosal healing Platelet count Mayo endoscopic subscore Platelet count

Creep and creep-fatigue behavior of high chromium steel weldment

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Acta Metallurgica Sinica(English Letters) 2011年第3期24卷 175-182页

作者： yukio takahashi Masaaki TABUCHI Materials Science Laboratory Central Research Institute of Electric Power Industry National Institute of Material Sciences

Strength of welded joints of high chromium steels is one of the important concerns for fabricators and operators of ultra supercritical thermal power plants. A number of creep as well as creep-fatigue tests with tensile hold have been carried out on the welded joints of two types of high chromium steels widely used in Japan, i.e. Grade 91 and 122 steels. It was found that failure occurred in fine grain heat-affected zone in all the creep-fatigue tests, even at a relatively low temperature and fairly short time where failure occurred in plain base metal region in simple creep testing. Four procedures were used to predict failure lives and their results were compared with the test results. A newly proposed energy-based approach gave the best estimation of failure life, without respect of the material and temperature.

关键词： Creep Creep-fatigue High chromium steel Life prediction Welded joint