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钢管混凝土KK型节点疲劳性能试验

交通运输工程学报 2024年第1期24卷 100-116页

作者：吴庆雄罗健平杨益伦陈康明缪承谕中村聖三福州大学土木工程学院福建福州350116 福州大学福建省土木工程多灾害防治重点实验室福建福州350116 福州大学福建省高校工程结构重点实验室福建福州350116 长崎大学工学部长崎长崎852-8521

为研究钢管混凝土KK(CFST-KK)型节点疲劳性能,开展了CFST-KK型节点模型疲劳试验,分析了CFST-KK型节点热点应力分布规律和疲劳性能演化过程;建立了CFST-KK型节点实体有限元模型,结合试验和有限元结果,分析了CFST-KK型节点与钢管混凝土K(C... 详细信息

为研究钢管混凝土KK(CFST-KK)型节点疲劳性能,开展了CFST-KK型节点模型疲劳试验,分析了CFST-KK型节点热点应力分布规律和疲劳性能演化过程;建立了CFST-KK型节点实体有限元模型,结合试验和有限元结果,分析了CFST-KK型节点与钢管混凝土K(CFST-K)型节点疲劳性能的差异性;研究了不同参数对KK型节点疲劳性能影响,探讨了适用于CFST-KK型节点疲劳寿命的评价方法。研究结果表明:采用二次外推方式计算的CFST-KK型节点,最大热点应力位于受拉支管相贯焊缝的主管侧冠点偏外鞍点15°处;计算CFST-KK型节点应力集中系数时,支管名义应力可仅考虑轴力和面内弯矩的影响而不考虑面外弯矩的影响,其应力集中系数为6.36,比CFST-K型节点大80.2%;CFST-KK型节点的疲劳裂纹萌生于最大热点应力处,在反复加载过程中裂纹沿焊趾根部向两侧与主管壁厚方向延伸,裂纹向外鞍点扩展的速度要略快于向内鞍点扩展的速度,停止反复加载后裂纹并未贯穿主管管壁;受支管面外弯矩与支管间空间效应的影响,CFST-KK型节点的抗疲劳性能与CFST-K型节点有明显差异;主管内填混凝土能提升CFST-KK型节点径向刚度,缓解应力集中情况;支管面外夹角增大会增大支管间空间效应的影响;考虑钢管内混凝土影响的CFST-K型节点的热力应力与疲劳寿命曲线在评价CFST-KK型节点疲劳寿命时具有良好的精度。

关键词：桥梁工程钢管混凝土KK型节点疲劳性能试验热点应力应力集中系数疲劳寿命

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Goblet cell carcinoid of the appendix:Six case reports

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World Journal of Clinical Cases 2024年第22期12卷 5217-5224页

作者： Toshiaki Toshima Ryo Inada Shinya Sakamoto Eri Takeda Takahiro Yoshioka Kento Kumon Naoki Mimura Nobuo Takata Motoyasu Tabuchi Kazuyuki Oishi Takuji Sato Kenta Sui Takehiro Okabayashi Kazuhide Ozaki Toshio nakamura Yuichi Shibuya Manabu Matsumoto Jun Iwata Department of Gastroenterological Surgery Kochi Health Sciences CenterKochi 781-8555Japan Department of Diagnostic Pathology Kochi Health Sciences CenterKochi 781-8555Japan

BACKGROUND Goblet cell carcinoid(GCC)of the appendix is a rare tumor characterized by neuroendocrine and adenocarcinoma *** preoperative diagnosis is very difficult,with most patients complaining mainly of abdominal *** tomography shows swelling of the appendix,so diagnosis is usually made incidentally after appendectomy based on a preoperative diagnosis of *** if a patient undergoes preoperative colonoscopy,accurate endoscopic diagnosis is very difficult because GCC shows a submucosal growth pattern with invasion of the appendiceal *** SUMMARY Between 2017 and 2022,6 patients with GCC were treated in our *** presenting complaint for 5 of these 6 patients was abdominal *** 5 patients underwent appendectomy,including 4 for a preoperative diagnosis of appendicitis and the other for diagnosis and treatment of an appendiceal *** sixth patient presented with vomiting and underwent ileocecal resection for GCC diagnosed from preoperative *** 2 patients with GCC underwent colonoscopy,no neoplastic changes were *** of the six patients showed lymph node metastasis on pathological *** of the last followup(median:15 mo),all cases remained alive without *** As preoperative diagnosis of GCC is difficult,this possibility must be considered during surgical treatments for presumptive appendicitis.

关键词： Goblet cell carcinoid Appendix Preoperative diagnosis Endoscopic diagnosis Surgical treatment Case report

Analysis of the Relationship between Eating and Swallowing Function and Lifestyle of the Elderly Living in the Community-A Secondary Publication

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Journal of Clinical and Nursing Research 2024年第2期8卷 56-69页

作者： Naito Tomoyoshi Yamada Masami nakamura Mi Eiko Ojima Toshiyuki Hamamatsu Medical University Shizuoka 431-3125HamamatsuJapan Department of Nursing Faculty of Medical SciencesTeikyo University of Science and TechnologyTokyo 120-0045Japan Hamamatsu Medical University Department of Health and Social MedicineShizuoka 431-3125HamamatsuJapan

Objectives:The relationship between eating and swallowing function,and lifestyle among community-dwelling elderly people has not been extensively *** study aimed to analyze the characteristics of eating and swallowing function and their association with the lifestyle among the ***:A self-administered questionnaire survey was conducted on 419 elderly people who participated in the oral function improvement project operated by the Community Comprehensive Support Center.A total of 288 valid responses(58 males,230 females,average age 73.6 years)were *** survey items included basic demographics,health status,lifestyle,and eating and swallowing *** chi-square(χ2)test was used to compare for a difference in the risk of ***:72 patients(25.0%)were judged to be at risk for dysphagia,and 216(75.0%)were judged to be not at risk for dysphagia using the revised dysphagia risk assessment *** mean score for oral preparatory dysphagia was the highest,while the mean score for pharyngeal dysphagia was the *** group at risk of dysphagia had significant difficulty in chewing and had bad sleep quality as compared to the group that was not at ***:Concerning the risk of dysphagia,there is a need to maintain and improve masticatory *** addition,improving the swallowing function of the elderly may prevent insomnia and improve sleep quality.

关键词： Elderly living in the community Eating and swallowing function Lifestyle

Phylobone: a comprehensive database of bone extracellular matrix proteins in human and model organisms

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骨研究:英文版 2023年第3期11卷 617-624页

作者： Margalida Fontcuberta-Rigo Miho nakamura Pere Puigbò Medicity Research Laboratory Faculty of MedicineUniversity of TurkuTykistökatu 620520 TurkuFinland Institute of Biomaterials and Bioengineering Tokyo Medical and Dental University2-3-10 Kanda-SurugadaiChiyodaTokyo 1010062Japan Graduate School of Engineering Tohoku University6-6 Aramaki Aza AobaAoba-kuSendaiMiyagi 9808579Japan Department of Biology University of Turku20500 TurkuFinland Eurecat Technology Center of Catalonia.Nutrition and Health UnitReus 43204 CataloniaSpain Department of Biochemistry and Biotechnology University Rovira i Virgili43007 TarragonaCataloniaSpain

The bone extracellular matrix(ECM) contains minerals deposited on highly crosslinked collagen fibrils and hundreds of noncollagenous proteins. Some of these proteins are key to the regulation of bone formation and regeneration via signaling pathways,and play important regulatory and structural roles. However, the complete list of bone extracellular matrix proteins, their roles, and the extent of individual and cross-species variations have not been fully captured in both humans and model organisms. Here, we introduce the most comprehensive resource of bone extracellular matrix(ECM) proteins that can be used in research fields such as bone regeneration, osteoporosis, and mechanobiology. The Phylobone database(available at https://***) includes 255proteins potentially expressed in the bone extracellular matrix(ECM) of humans and 30 species of vertebrates. A bioinformatics pipeline was used to identify the evolutionary relationships of bone ECM proteins. The analysis facilitated the identification of potential model organisms to study the molecular mechanisms of bone regeneration. A network analysis showed high connectivity of bone ECM proteins. A total of 214 functional protein domains were identified, including collagen and the domains involved in bone formation and resorption. Information from public drug repositories was used to identify potential repurposing of existing drugs. The Phylobone database provides a platform to study bone regeneration and osteoporosis in light of(biological) evolution,and will substantially contribute to the identification of molecular mechanisms and drug targets.

关键词： drugs matrix database

Pattern Sourcebook: Japanese Style: 250 Patterns for Projects and Designs Pap/Com

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Pattern Sourcebook: Japanese Style: 250 Patterns for Project...

Uniform Regularity for the Isentropic Compressible Magnetohydrodynamic System

丛书名： Pattern Sourcebook

2008年

作者： Shigeki nakamura

Title translated: 图案资料集: 日本风格 Originally published in Japan by MdN Corporation, Tokyo, Japan

ISBN: (纸本)1592534988;9781592534982

Title translated: 图案资料集: 日本风格 Originally published in Japan by MdN Corporation, Tokyo, Japan

关键词： Decoration and ornament Japan.

来源：畅想之星图书光盘版（南... 评论

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Acta Mathematicae Applicatae Sinica 2022年第2期38卷 410-416页

作者： Ji-shan FAN Fu-cai LI GEN nakamura Department of Applied Mathematics Nanjing Forestry UniversityNanjing 210037China Department of Mathematics Nanjing UniversityNanjing 210093China Department of Mathematics Hokkaido UniversitySapporo 060-0810Japan

In this paper we first establish the uniform regularity of smooth solutions with respect to the viscosity coefficients to the isentropic compressible magnetohydrodynamic system in a periodic domain T;.We then apply ou... 详细信息

关键词： isentropic compressible magnetohydrodynamic system uniform regularity

Characteristics of glucose change in diabetes mellitus generalized through continuous wavelet transform processing:A preliminary study

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World Journal of Diabetes 2023年第10期14卷 1562-1572页

作者： Yoichi nakamura Shinya Furukawa Cardiovascular Medicine&Diabetology Specified Clinic of Soyokaze CardioVascular Medicine and Diabetes CareMatsuyama 790-0026EhimeJapan Health Services Center Ehime UniversityMatsuyama 790-8577EhimeJapan

BACKGROUND The continuous glucose monitoring(CGM)system has become a popular evaluation tool for glucose fluctuation,providing a detailed description of glucose change *** hypothesized that glucose fluctuations may contain specific information on differences in glucose change between type 1 diabetes mellitus(T1DM)and type 2 diabetes mellitus(T2DM),despite similarities in change patterns,because of different *** Fourier transform,continuous wavelet transform(CWT)is able to simultaneously analyze the time and frequency domains of oscillating *** To investigate whether CWT can detect glucose fluctuations in *** The 60-d and 296-d glucose fluctuation data of patients with T1DM(n=5)and T2DM(n=25)were evaluated *** data obtained every 15 min for 356 d were *** were assessed by CWT with Morlet form(n=7)as the mother *** methodology was employed to search for limited frequency glucose fluctuation in the daily glucose *** frequency and enclosed area(0.02625 scalogram value)of 18 emerged signals were *** specificity for T1DM was evaluated through multiple regression analysis using items that demonstrated significant differences between them as explanatory *** The high frequency at midnight(median:75 Hz,cycle time:19 min)and middle frequency at noon(median:45.5 Hz,cycle time:32 min)were higher in T1DM vs T2DM(median:73 and 44 Hz;P=0.006 and 0.005,respectively).The area of the>100 Hz zone at midnight to forenoon was more frequent and larger in T1DM vs *** a day,the lower frequency zone(15-35 Hz)was more frequent and the area was larger in T2DM than in *** threedimensional scatter diagrams,which consist of the time of day,frequency,and area of each signal after CWT,revealed that high frequency signals belonging to T1DM at midnight had a loose distribution of wave cycles that were 17-24 *** analysis revealed that the high frequency signal at midnight could c

关键词： Continuous glucose monitoring Pathophysiology Fourier,Pseudo-frequency Contour map Scalogram matrix

Chemical Interpretation on the Multi-Stage Oxidation of Diethyl Ether

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Journal of Thermal Science 2023年第2期32卷 513-520页

作者： SAKAI Yasuyuki nakamura Hisashi SUGITA Toru TEZUKA Takuya UYGUN Yasar Department of Mechanical Systems Engineering Ibaraki UniversityIbaraki 316-8511Japan Institute of Fluid Science Tohoku UniversityMiyagi 980-8577Japan Graduate School of Engineering Tohoku UniversityMiyagi 980-8579Japan Mathematics and Logistics Jacobs University BremenBremen 28759Germany

Multi-stage ignition and/or double NTC(negative temperature coefficient)behavior resulted from the low-temperature oxidation of ether compounds are still not clearly *** have investigated the oxidation mechanism of a stoichiometric DEE(diethyl ether)/air mixture by using a micro flow reactor with a controlled temperature profile to see the detail of low-temperature weak flame *** simulation was also performed to understand the chemical kinetics mechanism of observed weak flame *** measurement showed separated weak flame in the temperature range of 600 K-800 *** simulation also qualitatively reproduced this separated weak flame,and showed four peak of heat *** the reaction flow analysis,it was found that(1)O-O bond scission reaction of keto-hydroperoxide produced by DEE,(2)O-O bond scission reaction of CH3O2H,CH3CO3H,and C2H5O2H,(3)O-O bond scission reaction of H2O2,and(4)H+O2=O+OH are key chain branching reactions to explain the multi-stage oxidation.

关键词： diethyl ether micro flow reactor weak flame multi-stage oxidation reaction path

Analysis for Effects of Temperature Rise of PV Modules upon Driving Distance of Vehicle Integrated Photovoltaic Electric Vehicles

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Energy and Power Engineering 2024年第4期16卷 131-150页

作者： Masafumi Yamaguchi Yasuyuki Ota Taizo Masuda Christian Thiel Anastasios Tsakalidis Arnulf Jaeger-Waldau Kenji Araki Kensuke Nishioka Tatsuya Takamoto Takashi Nakado Kazumi Yamada Tsutomu Tanimoto Yosuke Tomita Yusuke Zushi Kenichi Okumura Takashi Mabuchi Akinori Satou Kyotaro nakamura Ryo Ozaki Nobuaki Kojima Yoshio Ohshita Toyota Technological Institute Nagoya Japan Faculty of Engineering Miyazaki University Miyazaki Japan Toyota Motor Corporation Susono Japan European Commission— Joint Research Centre Ispra Italy Sharp Corporation Nara Japan Toyota Motor Corporation Toyota Japan Nissan Motor Corporation Yokosuka Japan

The development of vehicle integrated photovoltaics-powered electric vehicles (VIPV-EV) significantly reduces CO2 emissions from the transport sector to realize a decarbonized society. Although long-distance driving of VIPV-EV without electricity charging is expected in sunny regions, driving distance of VIPV-EV is affected by climate conditions such as solar irradiation and temperature rise of PV modules. In this paper, detailed analytical results for effects of climate conditions such as solar irradiation and temperature rise of PV modules upon driving distance of the VIPV-EV were presented by using test data for Toyota Prius and Nissan Van demonstration cars installed with high-efficiency InGaP/GaAs/InGaAs 3-junction solar cell modules with a module efficiency of more than 30%. The temperature rise of some PV modules studied in this study was shown to be expressed by some coefficients related to solar irradiation, wind speed and radiative cooling. The potential of VIPV-EV to be deployed in 10 major cities was also analyzed. Although sunshine cities such as Phoenix show the high reduction ratio of driving range with 17% due to temperature rise of VIPV modules, populous cities such as Tokyo show low reduction ratio of 9%. It was also shown in this paper that the difference between the driving distance of VIPV-EV driving in the morning and the afternoon is due to PV modules’ radiative cooling. In addition, the importance of heat dissipation of PV modules and the development of high-efficiency PV modules with better temperature coefficients was suggested in order to expand driving range of VIPV-EV. The effects of air-conditioner usage and partial shading in addition to the effects of temperature rise of VIPV modules were suggested as the other power losses of VIPV-EV.

关键词： Vehicle Integrated Photovoltaics (VIPV) VIPV-Powered Electric Vehicles Driving Distance PV Modules Solar Irradiation Temperature Rise Radiative Cooling