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Combination of adsorption and biodegradation processes for textile effluent treatment using a granular activated carbon-biofilm configured packed column system

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Journal of Environmental Sciences 2008年第8期20卷 952-956页

作者： ONG SoonAn TOORISAKA eiichi HIRATA Makoto HANO Tadashi Department of Applied Chemistry Oita UniversityOita 870-1192Japan.School of Environmental EngineeringUniversity Malaysia PerilsPerlis 02700Malaysia Department of Applied Chemistry Oita UniversityOita 870-1192Japan

The objective of this study was to investigate the feasibility of using a granular activated carbon-biofilm configured packed column system in the deeolodzation of azo dye Acid Orange 7-containing *** Acid Orange 7-degrading microbial from anaerobic sequencing batch reactor which treating the azo dye-containing wastewater for more than 200 d was immobilized on spent granular activated carbon(GAC)through *** GAC-biofilm configured packed column system showed the ability to decolorize 10...

关键词： granular activated carbon(GAC) color removal Acid Orange 7 azo dye immobilization

Wind-Tunnel Investigation of the Aerodynamic Performance of Surface-Modification Cables

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Engineering 2017年第6期3卷 817-822页

作者： Hiroshi Katsuchi Hitoshi Yamada Ippei Sakaki eiichi Okado Yokohama National University Yokohama 240-8501 Japan Shinko Wire Company Ltd. Amagasaki 660-0091 Japan

The wind-induced vibration of stay cables of cable-stayed bridges, which includes rain-wind-induced vibration （RWIV） and dry galloping （DG）, has been studied for a considerable amount of time. In general, mechanical dampers or surface modification are applied to suppress the vibration. In particular, several types of surface-modification cable, including indentation, longitudinally parallel protuberance, helical fillet, and U-shaped grooving, have been developed. Recently, a new type of aerodynamically stable cable with spiral protuberances was developed. It was confirmed that the cable has a low drag force coefficient, like an indented cable, and that it prevented the formation of water rivulets on the cable surface. In this study, the stability for RWIV of this cable was investigated with various flow angles and protuberance dimensions in a wind-tunnel test. It was found that the spiral protuberance cable is aerodynamically stable against both RWIV and DG for all test wind angles. The effects of the protuberance dimensions were also clarified.

关键词： Rain-wind-induced vibration Dry galloping Stay cable Wind-tunnel test

Influence of Setting Condition on Characteristics of Savonius Hydraulic Turbine with a Shield Plate

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Journal of Thermal Science 2011年第3期20卷 224-228页

作者： Shouichiro Iio Yusuke Katayama Fuminori Uchiyama eiichi Sato Toshihiko Ikeda Faculity of Eng. Shinshu University4-17-1 WakasatoNaganoJAPAN380-8553 Student of Shinshu University 4-17-1 WakasatoNaganoJAPAN380-8553 Flowserve Niigata Worthington Co. Ltd.1-32 ShinbashiKashiwazakiNiigataJAPAN945-0056 Faculty of Eng. Niigata Institute of Technology1719 FujihashiKashiwazakiNiigataJAPAN945-1195

The aim of this investigation was to improve power performance of Savonius hydraulic turbine utilizing small stream for electric *** attempt was made to increase the power coefficient of runner by the use of flat shield plate placed upstream of the *** difference of the power coefficient is discussed in relation to clearance between the runner and the bottom wall and the rotation direction of the *** flow field around the runner was also examined visually to clarify influences of setting conditions on the power *** this study it was found that the power coefficient is achieved for 0.47 by only using a flat shield plate,the increase is up to 80% over the runner without the ***,it is the proper condition that clearance ratio is 0.73 in this study.

关键词： Nano-hydraulic turbine Savonius runner Shield plate Performance

Moisture Detection of SF_6 Gas Instruments by Solid Electrolyte

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稀有金属材料与工程 2006年第A3期35卷 353-356页

作者： eiichi Nagao Tadao Minagawa Chieko Nishida Mitsuhito Kamei Mitsubishi Electric Corporation 8-1-1Tsukaguchi-HonmachiAmagasakiHyogo661-8661Japan

Humidity measurement in a very low moisture atmosphere was studied by using solid electrolyte film coated with porous electrodes,considering its application to the moisture monitoring of SF_6 gas-insulated high voltage instruments such as gas-insulated switchgear (GIS) and gas circuit breakers (GCBs).Compared to the AC impedance values measured in an ambient atmosphere where the moisture atmosphere is far higher than that in these instruments,considerably large impedance values were obtained in a very low moisture *** impedance was systematically measured in accordance with the conditions of these instruments whose moisture contents were less than 1 000×10^(-6).A good correlation was obtained between the impedance values and the moisture *** frequency characteristics of the impedance were analyzed based on a conventional equivalent circuit where a number of CR circuits were connected in *** the dielectric relaxation of each circuit,it was found that the frequency characteristics of the impedance can be explained by the equivalent circuit. Two semicircles were clearly obtained in the Cole-Cole impedance plot which are thought to reflect the impedance characteristics of the film and the *** AC impedance can be a good indicator of the moisture content of SF_6 gas-insulated high voltage instruments.

关键词： humidity moisture solid electrolyte impedance ion conductivity

Characteristics of Tantalum Surface Treated by 6-Triethoxysilylpropylamino-1,3,5-Triazine-2,4-Dithiol Using XPS

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稀有金属材料与工程 2012年第S1期41卷 33-37页

作者： Hirahara Hidetoshi Aisawa Sumio Narita eiichi Mori Katuhito Graduate School of Engineering Iwate UniversityMoriokaIwate 0208551Japan

The characteristic of material surfaces has a vital status in its application,for instance,surface properties of materials play a decisive role in adhesion technology between different materials.A method called molecule adhesion technology which can successfully adhere different materials such as polymers,rubbers,metals and exhibit strong adhesion strength without any adhesive *** this work,the rare metal of tantalum surface treated by corona and a molecular adhesive(6-triethoxysilylpropylamino1,3,5-triazine-2,4-dithiols,TES)has been investigated to clarify the reaction mechanism between tantalum and *** structures of surfaces treated by corona and TES were also *** contains two functional groups:one is alkoxysilyl group which can react with the OH group linked tantalum formed by the corona discharge treatment;the other is dithiol triazinyl group reacted with many other *** tantalum,corona treated and TES treated surfaces situation were analyzed by X-ray photoelectron spectroscopy(XPS).The result shows that the functional structure of OH groups was formed after corona discharge process and TES can be successfully reacted on the tantalum *** research can be as a preparation work to achieve the tantalum and other materials adhesion by using molecule adhesion technology in the MEMS and NEMS electronic device fields.

关键词： tantalum surface functional structure XPS adhesion

Growth mechanism of a preferentially oriented mordenite membrane

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2005年第5期6卷 369-372页

作者：厉刚林瑞森 KIKUCHI eiichi MATSUKATA Masahiko Department of Chemistry Zhejiang University Hangzhou 310027 China Department of Applied Chemistry Waseda University 3-4-1 Okubo Shinjuku-ku Tokyo 169-8555 Japan

A preferentially oriented mordenite membrane was successfully prepared on a seeded porous α-alumina support. Characterization results of XRD (X-ray diffractometer) and FE-SEM (field emission scanning electron microscope) revealed that evolutionary selection might predominantly contribute to the formation of the sharply oriented mordenite membrane. The nec- essary conditions under which evolutionary selection occurs are: (a) the number density of nuclei on the support surface should be high enough at the early stage; (b) the crystals should grow fastest along one direction; and (c) the zeolite layer should proceed via the successive growth of the crystals nucleated on the support surface instead of the accumulation of the crystals formed in the bulk solution.

关键词： Mordenite Zeolite membrane Orientation Evolutionary selection

Fatigue and fracture behavior of nickel-based superalloy Inconel 718 up to the very high cycle regime

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第10期11卷 727-737页

作者： Xian-feng MA Zheng DUAN Hui-ji SHI Ryosuke MURAI eiichi YANAGISAWA Applied Mechanics Laboratory Department of Engineering Mechanics School of Aerospace Tsinghua University Beijing 100084 China Mitsubishi Heavy Industries Ltd. Tokyo Japan

The fatigue and fracture behavior of nickel-based superalloy Inconel 718 was investigated up to the very high cycle regime under rotary bending tests at room temperature. It was found that this superalloy can still fracture after exceeding 107 cycles. Fractographic analysis revealed that there was a transition from fatigue crack initiation at multi-sites to single initiation with decreasing stress levels. The fracture surface can be divided into four areas according to the appearance, associated with fracture mechanics analysis of the corresponding stress intensity factors. The fracture mechanism dominant in each area was disclosed by scanning electron microscope examination and analyzed in comparison with those obtained from the crack growth tests. Subsequently, life prediction modeling was proposed by estimating the crack initiation and propagation stage respectively. It was found that Chan (2003)'s model for initiation life and the Paris law for growth life can provide comparable predictions against the experimental life.

关键词： Nickel-based superalloy High cycle fatigue (HCF) Fatigue crack initiation Crack growth Life prediction

Gigacycle fatigue behaviors of two SNCM439 steels with different tensile strengthes

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Acta Mechanica Sinica 2011年第5期27卷 778-784页

作者： Zheng Duan Xian-Feng Ma Hui-Ji Shi Ryosuke Murai eiichi Yanagisawa AML DepartmentofEngineeringMechanicsSchoolofAerospaceTsinghuaUniversity100084BeijingChinaAML Department of Engineering MechanicsSchool of Aerospace Tsinghua University100084 Beijing China Mitsubishi Heavy Industries Ltd. Tokyo Japan

Gigacycle fatigue behaviors of two SNCM439 steels with different tensile strengthes were experimentally studied by rotating bending tests,to investigate the effects of the tensile strength obtained by different heat treatment processes on very high cycle fatigue failure *** material with higher tensile strength of 1 710 MPa exhibited typical gigacycle fatigue failure characteristics,whereas one with lower tensile strength of 1 010 MPa showed only traditional fatigue limit during the tests and no gigacycle failure could be found even when the specimen ran up to more than 10 8 *** and fractographic analysis were carried out by an optical microscope （OM） and scanning electron microscope （SEM）.It showed two different crack initiation mechanisms that for the specimen with lower tensile strength the crack prefers surface initiation and for that with higher strength the crack initiates from subsurface inclusions revealed by a fish-eye like microstructure.

关键词： Gigacycle fatigue · S-N curves · Crack initiation · Fractography

Prediction of Acoustic Absorption Performance of a Perforated Plate with Air Jets

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Journal of Thermal Science 2017年第4期26卷 378-384页

作者： Hiromitsu Hamakawa Masanori Miyazaki Yuta Asai Eru Kurihara eiichi Nishida Hidechito Hayashi Department of Mechanical Engineering Oita University700 DannoharuOita 870-1192Japan Graduate Student Oita University700 DannoharuOita 870-1192Japan Department of Mechanical Systems Engineering Shonan Institute of Technology1-1-25 Tsujido-NishikaiganFuji-sawaKanagawa 251-8511Japan Department of Mechanical Engineering Nagasaki University1-14 Bunkyo machiNagasaki852-8521Japan

The present study focuses on the prediction of acoustic absorption performance of a perforated plate with air jets by theoretical calculations. In addition, we experimentally measured the flow rate, internal pressure, acoustic pressure, and transfer function using an acoustic impedance tube. The normal incidence absorption coefficient was calculated from the measured transfer function using transfer function methods. We investigated the influences of background air space, flow velocity, thickness, aperture rate, and aperture diameter of a perforated plate on the acoustic absorption characteristics. The frequency characteristics of the acoustic absorption coefficient showed a maximum value at a local frequency. As the background air space increased, the peak frequency of acoustic absorption characteristics decreased. As the flow velocity passing through the apertures increased, the peak level of the acoustic absorption coefficient also increased. The theoretical results agreed well with the experimental ones qualitatively.

关键词： acoustic absorption perforated plate theoretical prediction acoustic impedance tube air jets