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SYSTEMATIC DESIGN OF SINGLE CARRIER OVERLAP FREQUENCY DOMAIN EQUALIZATION

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Journal of Systems Science & Complexity 2010年第1期23卷 50-60页

作者： Wladimir BOCQUET Kazunori HAYASHI hideaki SAKAI Oranqe Labs Tokyo France Telecom Japan Co.Ltd Department of Systems Science Graduate School of InformaticsKyoto University

This paper proposes a systematic design method of overlap frequency domain equalization(FDE) for single carrier (SC) transmission without a guard interval (GI).Based on the analysis of signal-to-interference-plus-noise ratio (SINR) of the equalizer output for each symbol,the authors adaptivelydetermine the block of the overlap FDE,where the block is defined as a set of symbols at the equalizeroutput with sufficiently low error rate,for a certain fixed sliding window size,which corresponds toa fast Fourier transform (FFT) window *** proposed method takes advantage of the fact thatthe utility part of the equalized signal is localized around the center of the FFT *** addition,the authors also propose to adjust the block size in order to control the computational complexity ofthe equalization per processed sample associating with the average bit error rate (BER) of the *** results show that the proposed scheme can achieve comparable BER performance to theconventional SC-FDE scheme with sufficient GI insertion for both the coded and uncoded cases withvarious modulation levels,while requiring lower computational complexity compared to the SC overlapFDE transmission with the fixed block.

关键词： Overlap frequency domain equalization single carrier transmission SINR.

A Novel Estimating Method for Steering Efficiency of the Driver with Electromyography Signals

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Chinese Journal of Mechanical Engineering 2014年第3期27卷 460-467页

作者： LIU Yahui JI Xuewu HAYAMA Ryouhei mizuno Takahiro State Key Laboratory of Automotive Safety and Energy Tsinghua University Research and Development Center jtekt co.ltd.

The existing research of steering efficiency mainly focuses on the mechanism efficiency of steering system, aiming at designing and optimizing the mechanism of steering system. In the development of assist steering system especially the evaluation of its comfort, the steering efficiency of driver physiological output usually are not considered, because this physiological output is difficult to measure or to estimate, and the objective evaluation of steering comfort therefore cannot be conducted with movement efficiency perspective. In order to take a further step to the objective evaluation of steering comfort, an estimating method for the steering efficiency of the driver was developed based on the research of the relationship between the steering force and muscle activity. First, the steering forces in the steering wheel plane and the electromyography （EMG） signals of the primary muscles were measured. These primary muscles are the muscles in shoulder and upper ann which mainly produced the steering torque, and their functions in steering maneuver were identified previously. Next, based on the multiple regressions of the steering force and EMG signals, both the effective steering force and the total force capacity of driver in steering maneuver were calculated. Finally, the steering efficiency of driver was estimated by means of the estimated effective force and the total force capacity, which represented the information of driver physiological output of the primary muscles. This research develops a novel estimating method for driver steering efficiency of driver physiological output, including the estimation of both steering force and the force capacity of primary muscles with EMG signals, and will benefit to evaluate the steering comfort with an objective perspective.

关键词： electromyography muscle activity steering efficiency estimating

Prudent use of a left hepatic graft in adult-to-adult living donor liver transplantation: aiming for further securing donors' safety

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Hepatobiliary Surgery and Nutrition 2020年第3期9卷 360-363页

作者： hideaki Uchiyama Department of Surgery and Science Graduate School of Medical SciencesKyushu UniversityFukuokaJapan

Introduction The safety of donors in living donor liver transplantation(LDLT)is of paramount *** the morbidity of LDLT donors has been dramatically decreased,there is still room for further improving the outcomes of L... 详细信息

关键词： donor hepatic liver

Factors other than fibrosis that increase measured shear wave velocity

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World Journal of Gastroenterology 2022年第46期28卷 6512-6521页

作者： Hiroko Naganuma hideaki Ishida Department of Gastroenterology Yokote Municipal HospitalYokote 013-8602Japan Department of Gastroenterology Akita Red Cross HospitalAkita 010-1495Japan

Shear wave elastography(SWE)is now becoming an indispensable diagnostic tool in the routine examination of liver *** particular,accuracy is required for shear wave propagation velocity measurement,which is directly related to diagnostic *** is generally accepted that the liver shear wave propagation velocity reflects the degree of fibrosis,but there are still few reports on other factors that increase the shear wave propagation *** this study,we reviewed such factors in the literature and examined their *** SWE measures propagation velocity based on the assumption that the medium has a homogeneous structure,uniform density,and is purely ***,the measurement is subject to *** other(confounding)factors that we routinely experience are primarily:(1)Conditions that appear to increase the viscous component;and(2)Conditions that appear to increase tissue ***,the former includes acute hepatitis,congested liver,biliary obstruction,etc,and the latter includes diffuse infiltration of malignant cells,various storage diseases,tissue necrosis,*** any case,it is important to evaluate SWE in the context of the entire clinical picture.

关键词： Liver Shear wave elastography Propagation velocity Viscoelasticity Artifact Ultrasound

Influence of volute distortion on the performance of turbocharger centrifugal compressor with vane diffuser

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Science China(Technological Sciences) 2013年第11期56卷 2778-2786页

作者： ZHENG XinQian JIN Lei TAMAKI hideaki State Key Laboratory of Automotive Safety and Energy Tsinghua University Turbo Machinery and Engine Technology Department IHI Corporation

As the geometry of the volute of turbocharger compressor is non-axisymmetric,it causes a distortion at the outlet of the diffuser and influences the upstream components.A distortion model in which a pressure distortion was applied as outlet boundary condition was established to simulate the distortion induced by the *** turned out to be sufficient to impose a circumferentially asymmetric pressure distribution at the outlet of the diffuser to replace the *** on the distortion model which was verified,the influence of the amplitude of the distortion on the performance of centrifugal compressor was studied in *** results show that the distortion severely harms aerodynamic stability of the investigated *** larger the amplitude of the distortion,the worse the performance of the *** distortion induced by asymmetric volute propagates to upstream components and causes local flow separation at part of diffuser and impeller,and then causes the compressor *** the amplitude of the volute distortion is 10%,the stable flow range of the centrifugal compressor decreases to near *** authors’knowledge,the relationship between the compressor performance and distortion amplitude is first obtained quantitatively,which provides evidence to improve the performance of turbocharger compressor by decreasing the distortion induced by asymmetric volute.

关键词： turbocharger vane diffuser centrifugal compressor stability distortion

Tongue diagnosis: relationship between sublingual tongue morphology in three tongue protrusion angles and menstrual clinical symptoms

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Journal of Integrative Medicine 2015年第4期13卷 248-256页

作者： Tim hideaki Tanaka The Pacific Wellness Institute Department of Health Faculty of Health Science Tsukuba University of Technology

OBJECTIVE：The morphological and color characteristics of the tongue sublingual veins（SLVs）can manifest differently within the subjects,depending on the way their tongue is curled *** study was conducted in order to investigate the clinical relevancy of tongue SLV diagnosis in relation to menstrual clinical symptoms（pain,clots,heavy,and scanty）,using three different inspection procedures（IP1,IP2,and IP3）.METHODS：Three-hundred and seventy-seven female patients were asked to stick out their tongues in three specifi c ways which were intended to create different tongue protrusion *** SLV parameters for thickness（TK）,length（LE）,color（CL）,shape（SP）,and nodules（ND）were then ***：According to the results of the Waldχ2test,IP1 provides the best model for pain（R2=0.155）,IP3 for clots（R2=0.437）,IP2 for heavy（R2=0.268）,and scanty（R2=0.192）.Abnormal SLV diagnostic parameters were most strongly associated with the clinical symptom of clots（R2=0.492）.CONCLUSION：While the study showed the relations between tongue SLV features and menstrual clinical symptoms,as well it showed that IP2 was the best overall predictor for the symptomatic indexes used in this study,and using one particular SLV inspection procedure may not be suffi *** application of a particular inspection method alone may cause under-or over-estimation of SLV abnormalities.

关键词： tongue inspection medicine Chinese traditional dysmenorrheal

High-resolution angle-resolved photoemission study of oxygen adsorbed Fe/MgO(001)

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Chinese Physics B 2020年第6期29卷 60-68页

作者： Mingtian Zheng Eike FSchwier hideaki Iwasawa Kenya Shimada Graduate School of Science Hiroshima UniversityKagamiyama 1-3-1Higashi-Hiroshima 739-8526Japan Hiroshima Synchrotron Radiation Center Hiroshima UniversityKagamiyama 2-313Higashi-Hiroshima 739-0046Japan

We have investigated the electronic states of clean Fe(001) and oxygen adsorbed Fe(001)–p(1 × 1)-O films epitaxially grown on MgO(001) substrates by means of polarization-dependent angle-resolved photoemission spectroscopy(ARPES)and extensive density-functional theory(DFT) calculations. The observed Fermi surfaces and band dispersions of pure Fe near the Fermi level were modified upon oxygen adsorption. By the detailed comparison of ARPES and DFT results of the oxygen adsorbed Fe surface, we have clarified the orbital-dependent p–d hybridization in the topmost and second Fe ***, the observed energy levels and Fermi wave numbers for the oxygen adsorbed Fe surface were deviated from the DFT calculations depending on the orbital characters and momentum directions, indicating an anisotropic interplay of the electron correlation and p–d hybridization effects in the surface region.

关键词： angle-resolved photoemission iron surface oxygen adsorption density-functional theory(DFT)

A variant form of autoimmune pancreatitis successfully treated by steroid therapy, accompanied by von Meyenburg complex

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World Journal of Gastroenterology 2009年第5期15卷 622-627页

作者： hideaki Miura Shigehiro Kitamura Haruki Yamada Department of Internal Medicine Social Insurance Central General Hospital 3-22-1 Hyakunin-cho Shinjuku-ku Tokyo 169-0073 Japan Department of Pathology Social Insurance Central General Hospital 3-22-1 Hyakunin-cho Shinjuku-ku Tokyo 169-0073 Japan

Diagnostic criteria for autoimmune pancreatitis （AIP） have been proposed and used clinically because, despite its unique clinicopathological features, AIP does not have disease-specific serological tests for confirmation. However, diagnosis of a patient with pancreatic lesions mimicking cancer who deviates from these diagnostic criteria is still difficult. We present herein a patient with a variant form of AIP successfully diagnosed by fine-needle biopsy, whose response to steroid therapy was excellent. A 55-year-old Japanese man was admitted to hospital because of jaundice and pancreatic head mass. AIP was considered as one of the differential diagnoses; however, as the patient showed neither pancreatic duct narrowing nor immunological abnormalities, he did not meet the Japanese diagnostic criteria for AIP. Histopathology of the pancreatic mass demonstrated abundant infiltration by lymphocytes and interstitial fibrosis, which suggested AIP. Immunoreaction to IgG4, which is supposed to be specific to AIP, was not observed; however, response to subsequent prednisolone therapy was good, with dramatic pancreatic head mass regression. Aside from the pancreatic head mass, diffusely spreading small lesions were observed throughout the liver. The likelihood of a potential association with extrapancreatic lesions of AIP was considered and led us to carry out a liver biopsy, which revealed biliary hamartoma, also called yon Meyenburg complex （VMC）. As IgG4-positive plasma cell infiltration was not demonstrated in the hamartomatous regions, the hepatic condition was thought to have occurred incidentally; however, to the best of our knowledge, this is the first report in which the association between AIP and VMC was investigated and discussed.

关键词： Autoimmune pancreatitis Diagnosticcriteria IgG4 Biliary hamartoma von Meyenburgcomplex

Automated stopping criterion for spectral measurements with active learning

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npj Computational Materials 2021年第1期7卷 1252-1260页

作者： Tetsuro Ueno hideaki Ishibashi Hideitsu Hino Kanta Ono Synchrotron Radiation Research Center Kansai Photon Science InstituteQuantum Beam Science Research DirectorateNational Institutes for Quantum and Radiological Science and TechnologySayoHyogoJapan Department of Human Intelligence Systems Graduate School of Life Science and Systems EngineeringKyushu Institute of TechnologyKitakyushuFukuokaJapan The Institute of Statistical Mathematics Research Organization of Information and SystemsTachikawaTokyoJapan Department of Applied Physics Graduate School of EngineeringOsaka UniversitySuitaOsakaJapan Center for Integrative Quantum Beam Science Institute of Materials Structure ScienceHigh Energy Accelerator Research OrganizationTsukubaIbarakiJapan

The automated stopping of a spectral measurement with active learning is *** optimal stopping of the measurement is realised with a stopping criterion based on the upper bound of the posterior average of the generalisation error of the Gaussian process *** is revealed that the automated stopping criterion of the spectral measurement gives an approximated X-ray absorption spectrum with sufficient accuracy and reduced data *** proposed method is not only a proof-of-concept of the optimal stopping problem in active learning but also the key to enhancing the efficiency of spectral measurements for highthroughput experiments in the era of materials informatics.

关键词： criterion spectral optimal