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International Journal of Otolaryngology and Head & Neck Surgery 2012年第2期1卷 28-33页

作者： Motohiro Sawatsubashi toshiro umezaki Takemoto Shin Shizuo Komune Department of Otolaryngology-Head and Neck Surgery Graduate School of Medical Sciences Kyushu University Fukuoka Japan Saga Medical School Saga Japan

The aims of this study were to evaluate the results of CO2 laser surgery alone and CO2 laser surgery combined with radiotherapy in patients with T2N0M0 glottic carcinoma. A retrospective analysis was conducted of 35 cases of T2N0M0 glottic carcinoma. Fourteen patients with normal vocal cord mobility were treated with endoscopic CO2 laser surgery alone. The remaining 21 patients were treated with CO2 laser surgery followed by radiotherapy (44 - 70 Gy, including low-dose carboplatin chemoradiotherapy). Main outcome measures were local control, organ preservation, recurrence, 5-year survival, and successful salvage in cases of recurrence. We evaluated the patient’s voice with the psychoacoustics GRBAS scale, maximum phonation time (MPT), and airflow rate (AFR) obtained by aerodynamic tests. Mean follow-up period was 5 years. Among the 35 T2N0M0 patients, 5-year survival and 5-year voice preservation rates were 97% and 89%, respectively. Local recurrence occurred in 7 of these patients (20%);4 of 7 local recurrences were successfully re-treated by laser surgery. Total laryngectomy was necessary for salvage treatment in the remaining 3 patients. The post-treatment voice qualities were judged to be the same or improved over pretreatment qualities. There was little change in MPT and AFR after treatment in non-recurrence patients. CO2 laser microsurgery is an excellent tool for treating selected cases of T2N0M0

关键词： T2 Glottic Carcinoma Laryngeal Cancer Endoscopic Laser Surgery Chemoradiotherapy

A topology optimization for finite 1D phononic structures with objective function involving tangential derivative quantities using TDBIE

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Acta Mechanica Sinica 2024年第7期40卷 122-136页

作者： Haifeng Gao Jianguo Liang Jianglin Liu Yinhui Li Haojie Lian toshiro Matsumoto College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030000China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030000China College of Electronic Information and Optical Engineering Taiyuan University of TechnologyTaiyuan 030000China Key Laboratory of In-situ Property-improving Mining of Ministry of Education Taiyuan University of TechnologyTaiyuan 030000China Department of Mechanical System Nagoya UniversityNagoya 464-8604Japan

The paper proposes a topology optimization method for 1D phononic structures to minimize the tangential component of particle velocity at the objective *** tangential derivative of the boundary integral equation(TDBIE)is employed for the evaluation of the objective function involves the tangential derivative *** topological derivative is derived through the adjoint method and the Neumann boundary condition of the adjoint field is obtained using the *** average topological derivative which is obtained by calculating the average value of the topological derivative in each layer of design domains,is employed for the updating of the level set *** implementations demonstrate the proposed method is effective for the design of the 1D phononic crystals with the objective function involving tangential derivative quantities.

关键词： Boundary element method Topology optimization Phononic structures Tangential derivative

Effects of bottom bracings on torsional dynamic characteristics of horizontally curved twin I-girder bridges with different curvatures

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Earthquake Engineering and Engineering Vibration 2012年第2期11卷 149-162页

作者： Robiul Awall toshiro Hayashikawa Takashi Matsumoto Graduate School of Engineering Hokkaido University Faculty of Engineering Hokkaido University

Curved twin I-girder bridges (CTIGBs) have low torsional stiffness that makes them vulnerable to dynamic loads. This study investigates the effects of bottom bracings on the torsional dynamic characteristics of CTIGBs. Five types of bottom bracings are designed to investigate their effects on the dynamic characteristics of CTIGBs with different curvatures under free and forced vibrations. To perform numerical investigations, three-dimensional (3-D) finite element (FE) bridge and vehicle models are established using commercial ANSYS code, and then a vehicle-bridge interaction analysis approach is proposed. Road roughness profiles generated from power spectral density and cross spectral functions are also taken into account in the analyses. The numerical results show that torsional frequencies increase significantly after providing bottom bracings, and the increasing rate depends on the type of bottom bracings and their locations of installation. Bottom bracings can act as load transmitting members from one main girder to the others. Large negative bearing forces that have occurred in bridges with small radii of curvatures can be remarkably reduced by providing bottom bracing systems. It is found that the performances of several bottom bracing systems are effective in improving the torsional dynamic characteristics of the bridges in this study.

关键词： bottom bracing CTIGB FE model torsional stiffness dynamic response negative bearing force

Improvement in growth yield of single-walled carbon nanotubes with narrow chirality distribution by pulse plasma CVD

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Frontiers of Chemical Science and Engineering 2019年第3期13卷 485-492页

作者： Bin Xu toshiro Kaneko Toshiaki Kato Department o f Electronic Engineering Tohoku UniversitySendai 980-8579Japan Japan Science and Technology Agency (JST)-PRESTO Sendai 980-8579Japan

A pulse plasma chemical vapor deposition (CVD) technique was developed for improving the growth yield of single-walled carbon nanotubes (SWNTs) with a narrow chirality distribution. The growth yield of the SWNTs could be improved by repetitive short duration pulse plasma CVD, while maintaining the initial narrow chirality distribution. Detailed growth dynamics is discussed based on a systematic investigation by changing the pulse parameters. The growth of SWNTs with a narrow chirality distribution could be controlled by the difference in the nucleation time required using catalysts comprising relatively small or large particles as the key factor. The nucleation can be controlled by adjusting the pulse on/ofF time ratio and the total processing time.

关键词： single-walled carbon nanotubes chiralitycontrolled synthesis pulse plasma chemical vapor deposition

Numerical analysis on seismic response of Shinkansen bridge-train interaction system under moderate earthquakes

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Earthquake Engineering and Engineering Vibration 2011年第1期10卷 85-97页

作者： Xingwen He Mitsuo Kawatani toshiro Hayashikawa Takashi Matsumoto Faculty of Engineering Hokkaido University Sapporo 060-8628 Japan Graduate School of Engineering Kobe University Kobe 657-8501 Japan

This study is intended to evaluate the influence of dynamic bridge-train interaction （BTI） on the seismic response of the Shinkansen system in Japan under moderate earthquakes. An analytical approach to simulate the seismic response of the BTI system is developed. In this approach, the behavior of the bridge structure is assumed to be within the elastic range under moderate ground motions. A bullet train car model idealized as a sprung-mass system is established. The viaduct is modeled with 3D finite elements. The BTI analysis algorithm is verified by comparing the analytical and experimental results. The seismic analysis is validated through comparison with a general program. Then, the seismic responses of the BTI system are simulated and evaluated. Some useful conclusions are drawn, indicating the importance of a proper consideration of the dynamic BTI in seismic design.

关键词： seismic analysis train-bridge interaction seismic design Shinkansen

Prediction and mitigation analysis of ground vibration caused by running high-speed trains on rigid-frame viaducts

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Earthquake Engineering and Engineering Vibration 2016年第1期15卷 31-47页

作者： Liangming Sun Weiping Xie Xingwen He toshiro Hayashikawa School of Civil Engineering and Architecture Wuhan University of Technology Graduate School of Engineering Hokkaido University

In this study a 3D numerical analysis approach is developed to predict the ground vibration around rigid-frame viaducts induced by running high-speed trains. The train-bridge-ground interaction system is divided into two subsystems： the train-bridge interaction and the soil-structure interaction. First, the analytical program to simulate bridge vibration with consideration of train-bridge interaction is developed to obtain the vibration reaction forces at the pier bottoms. The high- speed train is described by a multi-DOFs vibration system and the rigid-frame viaduct is modeled with 3D beam elements. Second, applying these vibration reaction forces as input external excitations, the ground vibration is simulated by using a general-purpose program that includes soil-structure interaction effects. The validity of the analytical procedure is confirmed by comparing analytical and experimental results. The characteristics of high-speed train-induced vibrations, including the location of predominant vibration, are clarified. Based on this information a proposed vibration countermeasure using steel strut and new barrier is found effective in reducing train-induced vibrations and it satisfies environmental vibration requirements. The vibration screening efficiency is evaluated by reduction VAL based on 1/3 octave band spectral analysis.

关键词： ground vibration rigid-frame viaduct train-bridge interaction vibration countermeasure reduction VAL

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

FEM Modeling of Crack Propagation in a Model Multiphase Alloy

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Journal of Materials Science & Technology 2006年第1期22卷 59-65页

作者： Lihe QIAN Seishi NISHIDO Hiroyuki TODA toshiro KOBA YASHI Department of Production Systems Engineering Toyohashi University of Technology Toyohashi 441-8580 Japan IT Promotion Department Aisin Takaoka Co. Ltd. 1 Tennoh Takaokashin-machi Toyota 473-8501 Japan

In this paper, several widely applied fracture criteria were first numerically examined and the crack-tip-region Jntegral criterion was confirmed to be more applicable to predict fracture angle in an elastic-plastic multiphase material. Then, the crack propagation in an idealized an elastic-plastic finite element method. The variation dendritic two-phase AI-7%Si alloy was modeled using of crack growth driving force with crack extension was also demonstrated. It is found that the crack path is significantly influenced by the presence of α-phase near the crack tip, and the crack growth driving force varies drastically from place to place. Lastly, the simulated fracture path in the two-phase model alloy was compared with the experimentally observed fracture path.

关键词： Al-Si alloys Fracture criterion Fracture path Numerical simulation Finite element method (FEM) Multiphase microstructure

Ground motion spatial variability effects on seismic response control of cable-stayed bridges

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Earthquake Engineering and Engineering Vibration 2011年第1期10卷 37-49页

作者： Shehata E. Abdel Raheem toshiro Hayashikawa Uwe Dorka Civil Engineering Department Faculty of Engineering Assiut University Bridge and Structural Design Engineering Hokkaido University Steel & Composite Structures Kassel Universitt

The spatial variability of input ground motion at supporting foundations plays a key role in the structural response of cable-stayed bridges （CSBs）; therefore, spatial variation effects should be included in the analysis and design of effective vibration control systems. The control of CSBs represents a challenging and unique problem, with many complexities in modeling, control design and implementation, since the control system should be designed not only to mitigate the dynamic component of the structural response but also to counteract the effects of the pseudo-static component of the response. The spatial variability effects on the feasibility and efficiency of seismic control systems for the vibration control of CSBs are investigated in this paper. The assumption of uniform earthquake motion along the entire bridge may result in quantitative and qualitative differences in seismic response as compared with those produced by uniform motion at all supports. A systematic comparison of passive and active system performance in reducing the structural responses is performed, focusing on the effect of the spatially varying earthquake ground motion on the seismic response of a benchmark CSB model with different control strategies, and demonstrates the importance of accounting for the spatial variability of excitations.

关键词： cable-stayed bridge vibration control earthquake spatial variation seismic design semi-active control

Three-Dimensional Lattice Boltzmann Simulation of Two-Phase Flow Containing a Deformable Body with a Viscoelastic Membrane

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Communications in Computational Physics 2011年第5期9卷 1397-1413页

作者： toshiro Murayama Masato Yoshino Tetsuo Hirata Department of Mathematics and System Development Engineering Interdisciplinary Graduate School of Science and TechnologyShinshu University4-17-1 WakasatoNagano-shiNagano 380-8553Japan Satellite Venture Business Laboratory(SVBL) Shinshu University3-15-1 TokidaUeda-shiNagano 386-8567Japan Department of Mechanical Systems Engineering Faculty of EngineeringShinshu University4-17-1 WakasatoNagano-shiNagano 380-8553Japan CREST Japan Science and Technology Agency4-1-8 HonchoKawaguchi-shiSaitama 332-0012Japan

The lattice Boltzmann method(LBM)with an elastic model is applied to the simulation of two-phase flows containing a deformable body with a viscoelastic *** numerical method is based on the LBM for incompressible two-phase fluid flows with the same *** body has an internal fluid covered by a viscoelastic membrane of a finite *** elastic model is introduced to the LBM in order to determine the elastic forces acting on the viscoelastic membrane of the *** the present method,we take account of changes in surface area of the membrane and in total volume of the body as well as shear deformation of the *** using this method,we calculate two problems,the behavior of an initially spherical body under shear flow and the motion of a body with initially spherical or biconcave discoidal shape in square pipe *** deformations of the body(the Taylor shape parameter)for various shear rates are in good agreement with other numerical ***,tank-treading motion,which is a characteristic motion of viscoelastic bodies in shear flows,is simulated by the present method.

关键词： Lattice Boltzmann method(LBM) two-phase flow viscoelastic membrane shear flow tank-treading motion