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Chinese Journal of Chemical Engineering 2020年第12期28卷 2993-3001页

作者： Tomohito Kameda Kazuya Horikoshi Shogo Kumagai Yuko Saito toshiaki yoshioka Graduate School of Environmental Studies Tohoku University6-6-07 AobaAramakiAoba-kuSendai 980-8579Japan

In this paper,we propose that the urinary toxins from the wastewater be adsorbed on an adsorbent such as spherical activated carbon and the latter be regenerated by subjecting it to high temperatures to recycle activated carbon and also to recycle the water used in *** studied the adsorption of artificial waste dialysate,which is a mixed solution of urea,creatinine,and uric acid,and the separate solutions for each of these and found that their extents of adsorption onto the spherical activated carbon material were nearly *** amount of adsorption was approximately 1.4 mg·g^−1 for urea,18 mg·g^−1 for creatinine,and 20 mg·g^−1 for uric *** urea,creatinine,and uric acid adsorbed onto the spherical activated carbon decomposed on heat treatment at 500℃,and the adsorption capacity of the spherical activated carbon was *** study successfully demonstrated that the spherical activated carbon can be recycled in the waste dialysate treatment process.

关键词： Adsorption Dialysate Spherical activated carbon Recycling

Desorption of Cl^(-) from Mg-Al layered double hydroxide intercalated with Cl^(-) using CO_(2) gas and water

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Chinese Journal of Chemical Engineering 2021年第1期34卷 131-134页

作者： Tomohito Kameda Hiroki Uchida Shogo Kumagai Yuko Saito Keiichi Mizushina Ichirou Itou Tianye Han toshiaki yoshioka Graduate School of Environmental Studies Tohoku University6-6-07 AobaAramakiAoba-kuSendai 980-8579Japan Kurita Water Industries Ltd. Nakano Central Park East4-10-1 NakanoNakano-kuTokyo 164-0001Japan

Mg-Al layered double hydroxide intercalated with CO_(3)^(2-)(CO_(3)·Mg-Al LDH) is effective for treating HCl exhaust *** reacts with CO_(3)^(2-) in CO_(3)·Mg-Al LDH, resulting in the formation of Cl·Mg-Al *** propose that CO_(2) can be used for the desorption of Cl^(-)from Cl·Mg-Al LDH to regenerate CO_(3)·Mg-Al ***,we studied the desorption of a from CI-Mg-Al LDH by adding water to Cl·Mg-Al LDH and blowing CO_(2) into *** also analyzed the effects of temperature and water addition speed on the desorption of CI^(-)from Cl·Mg-Al *** results show that the added water adhered to CI·Mg-Al LDH and that CO_(2) in the gaseous phase was dissolved in this adhered water,thus generating CO_(3)^(2-).Therefore,anion exchange occurred between CO_(3)^(2-) and Cl^(-)in the Cl·Mg-Al LDH,thus desorbing Cl^(-).

关键词： Mg-Al layered double hydroxide CO_(2)gas Cl^(-)desorption Semi-dry method

Effects of slab geometry and obliquity on the interplate thermal regime associated with the subduction of three-dimensionally curved oceanic plates

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Geoscience Frontiers 2015年第1期6卷 61-78页

作者： Yingfeng Ji Shoichi yoshioka Research Center for Urban Safety and Security Kobe University Department of Earth and Planetary Science Graduate School of ScienceKobe University

We investigated the relationships among slab geometry, obliquity, and the thermal regime associated with the subduction of oceanic plates using a three-dimensional （3D） parallelepiped thermal convection model. Various models with convex and concave slab shapes were constructed in the numerical simu- lation, and the temperature and mantle flow distributions were calculated. The results revealed that when the slab dip angle increases, or the obliquity of subduction becomes steeper, the interplate tem- perature decreases remarkably. Cooler （warmer） zones on the plate interface were identified from the modeling where there was a larger （smaller） subduction angle. Consequently, the interplate temperature distribution is partly controlled by the true subduction angle （TSA）, which is a function of the slab dip angle and the obliquity of subduction. The rate of change of the interface temperature for the TSA was 10-50 ℃ （10°〈 TSA 〈 20°） at depths ranging from （TSA 10） × 5 km to 60 ＋（TSA 10） × 5 km for a fiat slab after a subduction history of 7 Myrs. The along-arc slab curvature affects the variation in TSA. The slab radius also appeared to influence the radius of induced mantle flow.

关键词： Temperature Mantle flow Heat flow Numerical simulation Slab geometry Obliquity

Kostka functions associated to complex reflection groups and a conjecture of Finkelberg-Ionov

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Science China Mathematics 2018年第2期61卷 353-384页

作者： toshiaki Shoji Department of Mathematics Tongji University

Kostka functions K_(λ,μ)~±(t), indexed by r-partitions λ and μ of n, are a generalization of Kostka polynomials K_(λ,μ)(t) indexed by partitions λ,μ of n. It is known that Kostka polynomials have an interpretation in terms of Lusztig's partition function. Finkelberg and Ionov(2016) defined alternate functions K_(λ,μ)(t) by using an analogue of Lusztig's partition function, and showed that K_(λ,μ)(t) ∈Z≥0[t] for generic μ by making use of a coherent realization. They conjectured that K_(λ,μ)(t) coincide with K_(λ,μ)^-(t). In this paper, we show that their conjecture holds. We also discuss the multi-variable version, namely, r-variable Kostka functions K_(λ,μ)~±(t_1,…,t_r).

关键词： Kostka functions complex reflection groups conjecture of Finkelberg-Ionov

Performance and Internal Flow of a Counter-rotating Type Tidal Stream Turbine

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Journal of Thermal Science 2015年第5期24卷 410-416页

作者： Bin Huang toshiaki Kanemoto Faculty of Engineering Kyushu Institute of Technology

In the past decade, the tidal energies have caused worldwide concern as it can provide regular and predictable re- newable energy resource for power generation. The majority of technologies for exploiting the tidal stream energy are based on the concept of the horizontal axis propellers, which can be derived from the design and operation of wind turbines. However, there are some peculiar features such as the propeller working in the seawater with free surface and the possible occurrence of cavitation as compared with wind turbines. Especially, for a coun- ter-rotating type tidal stream power turbine, it is difficult to accurately predict the interaction between the front and rear blades at the design stage by blade element momentum theory. As a result, CFD shows its advantage to predict the performance of counter-rotating type propellers of the tidal stream turbi^le. In order to improve the accuracy of CFD predictions, the predicted results must be verified with experimental values. In this paper, a CFD model using block-structured grid was set up and experimental test was performed in a water tunnel for a tidal stream turbine with counter-rotating type propellers. The comparison between CFD predictions and experimental data shows quite good agreement on the power coefficients, which provides an evidence of validation of the CFD model. Such results offer the necessary confidence in the accuracy of the set up CFD model for the coun- ter-rotating type tidal stream turbine.

关键词： Counter-rotating tidal stream turbine internal flow CFD experimental validation

Counter-Rotating Type Pump-Turbine Unit Cooperating with Wind Power Unit

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Journal of Thermal Science 2013年第1期22卷 7-12页

作者： Tengen Murakami toshiaki Kanemoto Faculty of Engineering Kyushu Institute of Technology

This serial research proposes the hybrid power system combined the wind power unit with the counter-rotating type pump-turbine unit,to provide the constant output for the grid system,even at the suddenly fluctuating/turbulent *** this paper,the tandem impellers of the counter-rotating type pumping unit was operated at the turbine mode,and the performances and the flow conditions were investigated numerically and *** 3-D turbulent flows in the runners were simulated at the steady state condition by using the commercial CFD code of ANSYS-CFX ver.12 with the SST turbulence *** providing the pump unit for the turbine mode,the maximum hydraulic efficiency is close to one of the counter-rotating type hydroelectric unit designed exclu-sively for the turbine ***,the runner/impeller of the unit works evidently so as to coincide the angularmomentum change through the front runners/impellers with that through the rear runners/impellers,namely to take the axial flow at not only the inlet but also the outlet without the guide *** results show that this type of unit is effective to work at not only the pumping but also the turbine modes.

关键词： pump-turbine pumping mode turbine mode power supply counter-rotation

A Wire-Driven Series Elastic Mechanism Based on Ultrasonic Motor for Walking Assistive System

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Chinese Journal of Mechanical Engineering 2023年第3期36卷 179-190页

作者： Weihao Ren Hiroki yoshioka Lin Yang Takeshi Morita State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China Graduate School of Frontier Sciences The University of TokyoKashiwa 2778563Japan

In order to improve the elderly people's quality of life,supporting their walking behaviors is a promising ***,based on one ultrasonic motor,a wire-driven series elastic mechanism for walking assistive system is proposed and investigated in this *** contrast to tradition,it innovatively utilizes an ultrasonic motor and a wire-driven series elastic mechanism to achieve superior system performances in aspects of simple structure,high torque/weight ratio,quiet operation,quick response,favorable electromagnetic compatibility,strong shock resistance,better safety,and accurately stable force *** proposed device is mainly composed of an ultrasonic motor,a linear spring,a steel wire,four pulleys and one rotating *** overcome the ultrasonic motor's insufficient output torque,a steel wire and pulleys are smartly combined to directly magnify the torque instead of using a conventional gear *** the pulleys,there is one tailored pulley playing an important role to keep the reduction ratio as 4.5 ***,the prototype is manufactured and its actual performance is verified by experimental *** a one-second operating cycle,it only takes 86 ms for this mechanism to output an assistive torque of 1.6 N·*** this torque,the ultrasonic motor's speed is around 4.1 rad/***,experiments with different operation periods have been conducted for different application *** study provides a useful idea for the application of ultrasonic motor in walking assistance system.

关键词： Ultrasonic motor Wire-driven Series elastic mechanism Walking assistive system Pulley Reduction ratio

ADCP application for long-term monitoring of coastal water

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Acta Oceanologica Sinica 2005年第1期24卷 95-100页

作者： yoshioka Hiroshi TAKAYAMA Tomotsuka SERIZAWA Shigeatsu Faculty of Information Science and Technology Aichi Prefectural University Aichi 480-1198 JapanDisaster Prevention Research Institute Kyoto-University Kyoto 611-0011 JapanDisaster Prevention Research Institute Kyoto-University Kyoto 611-0011 Japan

Three kind of application of ADCP is reported for long-term monitoring in coastal sea.(1)The routine monitoring of water qualities. The water quality and ADCP echo data (600 kHz) observed in the long-term are analgzed at MT (Marine Tower) Station of Kansai International Airport in the Osaka Bay, Japan. The correlation between the turbidity and echo intensity in the surface layer is not good because air bubbles generated by breaking wave are not detected by the turbidity meter, but detected well by ADCP. When estimating the turbidity consists of plankton population from echo intensity, the effect of bubbles have to be eliminated. (2) Monitoring stirring up of bottom sediment. The special observation was carried out by using following two ADCP in the Osaka Bay, One ADCP was installed upward on the sea. The other ADCP was hanged downward at the gate type stand about 3 m above from the bottom. At the spring tide, high echo intensities indicating the stirring up of bottom sediment were observed. (3) The monitoring for the boundary condition of water mixing at an estuary. In summer season, the ADCP was set at the mouth of Tanabe Bay in Wakayama Prefecture, Japan. During the observation, water temperature near the bottom showed remarkable falls with interval of about 5-7 d. When the bottom temperature fell, the inflow current with low echo intensity water appears at the bottom layer in the ADCP record. It is concluded that when occasional weak northeast wind makes weak coastal upwelling at the mouth of the bay, the combination of upwelling with internal tidal flow causes remarkable water exchange and dispels the red tide.

关键词： ADCP echo intensity monitoring coastal water red tide stirring up

Crystallization Conditions and Petrogenesis of the Paleoproterozoic Basement Rocks in Bangladesh:An Evaluation of Biotite and Coexisting Amphibole Mineral Chemistry

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Journal of Earth Science 2014年第1期25卷 87-97页

作者： Ismail Hossain toshiaki Tsunogae Department of Geology and Mining University of Rajshahi Faculty of Life and Environmental Sciences (Earth Evolution Sciences) University of Tsukuba Department of Geology University of JohannesburgAuckland Park 2006

The Paleoproterozoic （-1.73 Ga） basement rocks from Maddhapara, Bangladesh show a large range of chemical variations including diorite, quartz diorite, monzodiorite, quartz monzonite and granite. These are composed of varying proportions of quartz＋plagioclase＋K-feldspar＋biotite＋ hornblende±epidote＋titanite＋magnetite＋apatite and zircon. Amphibole and biotite, dominant ferro- magnesian minerals, have been analyzed with an electron microprobe. The biotite, Mg-dominant trioc- tahedral micas, is classified as phlogopitic nature. Relatively high Mg （1.33-1.53 pfu）, Mg^# （0.52-0.59） and low AIw （0.13-0.25 pfu） contents in the biotite reflect slightly fractionated magma, which might be a relative indicator for the origin of the parental magma. Biotite is also a very good sensor of oxidation state of the parental magma. Oxygen fugacity of the studied biotites estimate within the QFM and HM buffers and equilibrate at about -12.35 and -12.46, which exhibit the source materials were relatively higher oxidation state during crystallization and related to arc magmatism. Whereas, calcic amphi- boles, a parental member of arc-related igneous suite, display consistent oxygen fugacity values （-11.7 to -12.3）, low Al^# （0.16-0.21） with H2Omelt （5.6 wt.%-9.5 wt.%） suggest their reliability with the typical values of calc-alkaline magma crystallization. The oxygen fugacity of magma is related to its source material, which in turn depends on tectonic setting. Discrimination diagrams and chemical indices of both biotite and amphibole of dioritic rocks reveal calc-alkaline orogenic complexes; mostly I-type suite formed within subduction-related environments. Moreover, igneous micas are used as metal- logenic indicator. The biotites with coexisting amphibole compositions show an apparent calc-alkaline trend of differentiation. The study suggests that the trend of oxidized magmas is commonly associated with compressive tectonic and convergent plate boundaries.

关键词： oxygen fugacity biotite Paleoproterozoic basement rock Columbia supercontinent Bangladesh.

Inhibitory effect and mechanism of acarbose combined with gymnemic acid on maltose absorption in rat intestine

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World Journal of Gastroenterology 2001年第1期7卷 9-15页

作者： toshiaki Imoto Yasutake Hiji Departments of Physiology Faculty of Medicine Tottori University Yonago 683-0826 Japan

AIM: To compare the combinative and individual effect of acarbose and gymnemic acid (GA) on maltose absorption and hydrolysis in small intestine to determine whether nutrient control in diabetic care can be improved by combination of them. METHODS: The absorption and hydrolysis of maltose were studied by cyclic perfusion of intestinal loops in situ and motility of the intestine was recorded with the intestinal ring in vitro using Wistar rats. RESULTS: The total inhibitory rate of maltose absorption was improved by the combination of GA (0.1g/L-1.0 g/L) and acarbose (0.1 mmol/L-2.0 mmol/L) throughout their effective duration (P <0.05, U test of Mann-Whitney), although the improvement only could be seen at a low dosage during the first hour. With the combination, inhibitory duration of acarbose on maltose absorption was prolonged to 3h and the inhibitory effect onset of GA was fastened to 15 min. GA suppressed the intestinal mobility with a good correlation (r = 0.98) to the inhibitory effect of GA on maltose absorption and the inhibitory effect of 2 mmol/L (high dose) acarbose on maltose hydrolysis was dual modulated by 1g/L GA in vivo indicating that the combined effects involved the functional alteration of intestinal barriers. CONCLUSION: There are augmented effects of acarbose and GA,which involve pre-cellular and paracellular barriers. Diabetic care can be improved by employing the combination.

关键词： Acarbose Animal Nutrition Animals Diabetes Mellitus, Type 2 Dose-Response Relationship, Drug Drug Interactions Gastrointestinal Motility Hypoglycemic Agents In Vitro Intestinal Absorption Intestine, Small Male Maltose Rats Rats, Wistar Research Support, Non-U.S. Gov't Saponins Triterpenes