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Exploitation of shape memory alloy actuator using resistance feedback control and its development

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Progress in Natural Science:Materials International 2010年第1期20卷 97-103页

作者： Hiroki CHO Takaei YAMAMOTO yuji takeda Akihiko SUZUKI Toshio SAKUMA Faculty of Engineering Oita University700 DannoharuOita 870-1192Japan TAKE R&D 2-7-27UmedaKasukabeJapan

The relationship between phase transformation and electric resistivity of Ti-42.6Ni-7Cu SMA was *** the isothermal tensile tests,stress-strain curve shows large hysteresis and nonlinearity,whereas the resistivity-strain curve can be fitted by *** resistivity of SMAs can be determined from the volume fractions of the martensitic and austenitic *** characteristics leads to that the resistance of the SMAs is used as a parameter of strain of SMAs.A SMA actuator using resistance feedback control system was proposed,which can control and retain positioning at any positions without using sensor devices,and the deviation of position of this system was less than 3 μm.

关键词： Ti-Ni-Cu alloy shape memory alloy resistivity shape memory characteristics phase transformation

Deep carbon recycling viewed from global plate tectonics

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National Science Review 2024年第6期11卷 37-55页

作者： Maoliang Zhang Sheng Xu yuji Sano School of Earth System Science Tianjin University Marine Core Research Institute Kochi University Atmosphere and Ocean Research Institute The University of Tokyo

Plate tectonics plays an essential role in the redistribution of life-essential volatile elements between Earth's interior and surface, whereby our planet has been well tuned to maintain enduring habitability over much of its history. Here we present an overview of deep carbon recycling in the regime of modern plate tectonics,with a special focus on convergent plate margins for assessing global carbon mass balance. The up-to-date flux compilation implies an approximate balance between deep carbon outflux and subduction carbon influx within uncertainty but remarkably limited return of carbon to convecting mantle. If correct, carbon would gradually accumulate in the lithosphere over time by（i） massive subsurface carbon storage occurring primarily in continental lithosphere from convergent margins to continental interior and（ii） persistent surface carbon sinks to seafloors sustained by high-flux deep CO2emissions to the atmosphere. Further assessment of global carbon mass balance requires updates on fluxes of subduction-driven carbon recycling paths and reduction in uncertainty of deep carbon outflux. From a global plate tectonics point of view, we particularly emphasize that continental reworking is an important mechanism for remobilizing geologically sequestered carbon in continental crust and sub-continental lithospheric mantle. In light of recent advances,future research is suggested to focus on a better understanding of the reservoirs, fluxes, mechanisms, and climatic effects of deep carbon recycling following an integrated methodology of observation, experiment,and numerical modeling, with the aim of decoding the self-regulating Earth system and its habitability from the deep carbon recycling perspective.

关键词： deep carbon recycling convergent plate margins subduction continental reworking global carbon mass balance

Solar energetic particles intensity variations associated with a tilted-dipole 3D corotating interaction region

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Earth and Planetary Physics 2024年第5期8卷 797-810页

作者： yuji Zhu Fang Shen Xi Luo Yang Wang BoFeng Tang State Key Laboratory of Space Weather National Space Science Center Chinese Academy of Sciences Shandong Institute of Advanced Technology (SDIAT) College of Earth and Planetary Sciences University of Chinese Academy of Sciences School of Science Harbin Institute of Technology

The effect of a tilted-dipole three-dimensional corotating interaction region(CIR) on the transport and acceleration of solar energetic particles(SEPs) is *** this work,we discussed how the particle intensity longitudinal and radial dependence might be influenced by the background ***,we investigate how the spectral index distribution is modulated by the CIR structure We use the focused transport equation(FTE) to describe the propagation and acceleration of SEPs in a tilt-dipole 3D CIR,generated by the high-resolution 3D magnetohydrodynamic(MHD) *** forward stochastic differential method is used to solve the *** protons with theE～(-4.4)spectrum from 0.5 to 15 MeV are injected uniformly at the heliographic equator of 0.15 *** quantities are extracted along each interplanetary magnetic field(IMF) line to show the *** the tilted-dipole CIR background,if injected from the solar equator at the inner boundary,particles in the slow flow are transported to higher latitudes due to the extension of the IMF lines to higher *** longitudinal patterns of the particles are dominated by the density of IMF *** focusing effect modulates the longitudinal variation of the particle intensity and gives rise to new longitudinal intensity *** adiabatic effect largely increases the intensity fluctuation along the *** structure of the solar wind can also lead to the difference of the index α in the empirical functionI＿(max)=kR～(-α),describing the radial variation of peak intensity according to our *** the influence of the CIR structure,the index α varies from 1.9 to 3.4 at 0.3-1.0 *** variation of the solar wind speed should be considered when estimating the radial dependence of the SEP peak *** spectra indices rise near the CIR boundaries and drop near the stream interface(SI).The adiabatic effect makes the spatial variability of the spectral index *** spectral index could be sim

关键词： solar energetic particle (SEP) corotating interaction regions (CIR) magnetohydrodynamic (MHD)

A scientometric review of research on built environment influence on public transportation demand

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Journal of Traffic and Transportation Engineering(English Edition) 2024年

作者： yuji Shi Zan Zhang Zhuofan Yan Department of Traffic Engineering， Jiangsu University

There is a rich amount of reviews offer valuable references on the topic of exploring relationship between built environment and public transportation demand， but they often focus on certain perspectives and none of them provide a comprehensive and quantitative overview on available publications. To fill this gap， this study employed bibliometric analysis to develop a comprehensive review of relevant literature retrieved from the WOS core collection database from 2001 to 2022， aiming to identify the evolutionary trends and hot topics at global level， including historical and geographical trends， leading journals and institutions， keyword characteristics， citation network analysis and content analysis. The output results show that there is an increasing geographic spread along with the growth spurt of research publications on the topic of built environment influence on public transportation demand. According to results output from the keywords’ distribution and citation network analysis， hot topics of available studies as well as future research directions were identified based on their research objects， built environment measurement， and applied models. It is hoped that the output results will help researchers gain a deeper understanding of the development of research in this area， and help urban planning decision makers determine the most effective decisions and the most appropriate practices.

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Wild Gibbon Optimization Algorithm

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Computers, Materials & Continua 2024年第7期80卷 1203-1233页

作者： Jia Guo JinWang Ke Yan Qiankun Zuo Ruiheng Li Zhou He Dong Wang yuji Sato Hubei Key Laboratory of Digital Finance Innovation Hubei University of EconomicsWuhan430205China School of Information Engineering Hubei University of EconomicsWuhan430205China China Construction Third Engineering Bureau Installation Engineering Co. Ltd.Wuhan430074China Hubei Internet Finance Information Engineering Technology Research Center Hubei University of EconomicsWuhan430205China College of Informatics Huazhong Agricultural UniversityWuhan430070China Faculty of Computer and Information Sciences Hosei UniversityTokyo184-8584Japan

Complex optimization problems hold broad significance across numerous fields and ***,as the dimensionality of such problems increases,issues like the curse of dimensionality and local optima trapping also *** address these challenges,this paper proposes a novel Wild Gibbon Optimization Algorithm(WGOA)based on an analysis of wild gibbon population *** two strategies:community search and community *** community search strategy facilitates information exchange between two gibbon families,generating multiple candidate solutions to enhance algorithm ***,the community competition strategy reselects leaders for the population after each iteration,thus enhancing algorithm *** assess the algorithm’s performance,CEC2017 and CEC2022 are chosen as test *** the CEC2017 test suite,WGOA secures first place in 10 *** the CEC2022 benchmark functions,WGOA obtained the first rank in 5 *** ultimate experimental findings demonstrate that theWildGibbonOptimization Algorithm outperforms others in tested *** underscores the strong robustness and stability of the gibbonalgorithm in tackling complex single-objective optimization problems.

关键词： Complex optimization wild gibbon optimization algorithm community search community competition

Spinal cord injury regenerative therapy development:integration of design of experiments

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Neural Regeneration Research 2025年第9期20卷 2571-2573页

作者： yuji Okano Hideyuki Okano Yoshitaka Kase Division of CNS Regeneration and Drug Discovery International Center for Brain Science(ICBS)Fujita Health UniversityKutsukake-ChoToyoake-ShiAichiJapan Department of Extended Intelligence for Medicine The Ishii-Ishibashi LaboratoryKeio University School of MedicineShinanomachiShinjuku-KuTokyoJapan Keio University Regenerative Medicine Research Center Kawasaki-kuKawasaki-shiJapan

Spinal cord injury(SCI)can cause motor and sensory paralysis,and autonomic nervous system disorders including malfunction of urination and defecation,thereby significantly impairing the quality of *** continue to explo re new stem cell strategies for the treatment of paralysis by transpla nting human induced pluripotent stem cell-derived neural ste m/progenitor cells(hiPSCNS/PCs)into spinal cord injured tissues.

关键词： Spinal paralysis injury

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A novel approach based on a modified mask R-CNN for the weight prediction of live pigs

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Artificial Intelligence in Agriculture 2024年第2期12卷 19-28页

作者： Chuanqi Xie yuji Cang Xizhong Lou Hua Xiao Xing Xu Xiangjun Li Weidong Zhou State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products Institute of Animal Husbandry and Veterinary ScienceZhejiang Academy of Agricultural SciencesHangzhou 310021China College of Information Engineering China Jiliang UniversityHangzhou 310018China College of Hydraulic Engineering Zhejiang Tongji Vocational College of Science and TechnologyHangzhou 311231China

Since determining the weight of pigs during large-scale breeding and production is challenging,using non-contact estimation methods is *** study proposed a novel pig weight prediction method based on a mod-ified mask region-convolutional neural network(mask R-CNN).The modified approach used ResNeSt as the backbone feature extraction network to enhance the image feature extraction *** feature pyramid net-work(FPN)was added to the backbone feature extraction network for multi-scale feature *** channel at-tention mechanism(CAM)and spatial attention mechanism(SAM)were introduced in the region proposal network(RPN)for the adaptive integration of local features and their global dependencies to capture global in-formation,ultimately improving image segmentation *** modified network obtained a precision rate(P),recall rate(R),and mean average precision(MAP)of 90.33%,89.85%,and 95.21%,respectively,effectively segmenting the pig regions in the *** image features,namely the back area,body length,body width,average depth,and eccentricity,were *** pig depth images were used to build five regression algo-rithms(ordinary least squares(OLS),AdaBoost,CatBoost,XGBoost,and random forest(RF))for weight value *** achieved the best prediction result with a coefficient of determination(R^(2))of 0.987,a mean absolute error(MAE)of 2.96 kg,a mean square error(MSE)of 12.87 kg^(2),and a mean absolute percentage error(MAPE)of 8.45%.The results demonstrated that the machine learning models effectively predicted the weight values of the pigs,providing technical support for intelligent pig farm management.

关键词： Deep learning Modified mask R-CNN Image processing Pig weight Prediction

DPY19L3 promotes vasculogenicmimicry by its C-mannosyltransferase activity

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Oncology Research 2024年第4期32卷 607-614页

作者： HASSAN BAYDOUN yuji KATO HIROKI KAMO ANNA HÜSCH HAYATO MIZUTA RYOTA KAWAHARA SIRO SIMIZU Department of Applied Chemistry Faculty of Science and TechnologyKeio UniversityYokohama223-8522Japan Department of Pharmacy and Biochemistry Faculty of ScienceUniversity of TübingenTübingen72074Germany

C-mannosylation is a post-translational modification that occurs intracellularly in the endoplasmic *** humans,biosynthesis of C-mannosylation in proteins containing thrombospondin type 1 repeat is catalyzed by the DPY19 family;nonetheless,biological functions of protein C-mannosylation are not yet fully understood,especially in tumor *** mimicry(VM)is the formation of fluid-conducting channels by highly invasive and genetically deregulated tumor cells,enabling the tumors to form matrix-embedded vasculogenic structures,containing plasma and blood cells to meet the metabolic demands of rapidly growing *** this study,we focused on DPY19L3,a C-mannosyltransferase,and aimed to unravel its role in *** of DPY19L3 inhibited the formation of VM in HT1080 human fibrosarcoma ***-expression of wild-type DPY19L3 recovered VM formation;however,DPY19L3 isoform2,an enzymatic activity-defect mutant,did not restore it,suggesting that the C-mannosyltransferase activity of DPY19L3 is crucial to its ***,the knockdown of DPY19L3 in MDA-MB-231 breast cancer cells hindered its network formation ***,our findings suggest that DPY19L3 is required for VM formation and stipulate the relevance of C-mannosylation in oncogenesis.

关键词： C-mannosylation Vasculogenic mimicry DPY19L3

Natural history of asymptomatic gallbladder stones in clinic without beds:A long-term prognosis over 10 years

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World Journal of Clinical Cases 2024年第1期12卷 42-50页

作者： yuji Sakai Toshio Tsuyuguchi Hiroshi Ohyama Junichiro Kumagai Takashi Kaiho Masayuki Ohtsuka Naoya Kato Tadao Sakai Department of Gastroenterology Sakai ClinicKimistu 299-1162Japan Department of Gastroenterology Graduate School of MedicineChiba UniversityChiba 260-8677Japan Department of Gastroenterology Chiba Prefectural Sawara HospitalChiba Prefectural Sawara HospitalSawara 287-0003Japan Department of Gastroenterology Kimitsu Central HospitalKisarazu 292-8535Japan Department of Surgery Kimitsu Central HospitalKisarazu 292-8535Japan Department of General Surgery Graduate School of MedicineChiba UniversityChiba 260-8677Japan

BACKGROUND Several studies have explored the long-term prognosis of patients with asymp-tomatic gallbladder *** reports were primarily conducted in facilities equipped with beds for addressing symptomatic *** To report the long-term prognosis of patients with asymptomatic gallbladder stones in clinics without bed *** We investigated the prognoses of 237 patients diagnosed with asymptomatic gallbladder stones in clinics without beds between March 2010 and October *** symptoms developed,patients were transferred to hospitals where appropriate treatment was *** investigated the asymptomatic and survival periods during the *** Among the 237 patients,214(90.3%)remained asymptomatic,with a mean asymptomatic period of 3898.9279±46.871 d(50-4111 d,10.7 years on average).Biliary complications developed in 23 patients(9.7%),with a mean survival period of 4010.0285±31.2788 d(53-4112 d,10.9 years on average).No patient died of biliary *** The long-term prognosis of asymptomatic gallbladder stones in clinics without beds was *** the condition became symptomatic,the patients were transferred to hospitals with beds that could address it;thus,no deaths related to biliary complications were *** finding suggests that follow-up care in clinics without beds is possible.

关键词： Gallbladder stone Acute cholangitis Acute cholecystitis Asymptomatic gallbladder stone Symptomatic gallbladder stone