检索结果-南通市图书馆

Investigation on Temperature Separation and Flow Behaviour in Vortex Chamber

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2015年第2期24卷 149-154页

作者： Yuhi Matsuno yusuke fukushima Shigeru Matsuo Tokitada Hashimoto Toshiaki Setoguchi Heuy Dong Kim Graduate School of Science and Engineering Saga University Department of Advanced Technology Fusion Saga University Institute of Ocean Energy Saga University School of Mechanical Engineering Andong National University

In the previous researches, it is known that the swirl flow in circular pipe causes the temperature separation. Recently, it is shown that the temperature separation occurs in a vortex chamber when compressed air are pumped into this device from the periphery. Especially, in a cavity installed in the periphery of the chamber, the highest temperature was observed. Therefore, it is expected that this device can be used as a heat source in the engineering field. In recent researches, the mechanism of temperature separation in vortex chamber has been investigated by some researchers. However, there are few researches for the effect of diameter and volume of vortex chamber, height of central rod and position of cavity on the temperature separation. Further, no detailed physical explanation has been made for the temperature separation phenomena in the vortex chamber. In the present study, the effects of chamber configuration and position of the cavity on temperature separation in the vortex chamber were investigated experimentally.

关键词： Compressible flow Vortex chamber Cavity flow Temperature separation

Effect of Nozzle Inlet Shape on Annular Swirling Flow with Non-Equilibrium Condensation

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2015年第4期24卷 344-349页

作者： yusuke fukushima Shigeru MATSUO Toshiaki SETOGUCHI Norimasa SHIOMI Tokitada HASHIMOTO Heuy Dong KIM and Shen YU Graduate School of Science & Engineering Saga University Department of Advanced Technology Fusion Saga University Institute of Ocean Energy Saga University Department of Mechanical Engineering Saga University School of Mechanical Engineering Andong National University Institute of Engineering Thermophysics Chinese Academy of Science

Recently,by combining a swirl flow with non-equilibrium condensation phenomena of condensate gas generated in a supersonic flow,a separating and extracting techniques of condensate gas have been *** technique can reduce the size of the device and don't use *** the present study,by using a non-equilibrium condensation phenomenon of moist air occurred in the supersonic flow in the annular nozzle composed of an inher body and an outer nozzle with a swirl,the possibility of separation of the condensable gas and the effect of shape of nozzle inlet on the flow field were examined numerically.

关键词： compressible flow non-equilibrium condensation supersonic annular nozzle swirl flow simulation

Control of Snow Falling Flow around NACA0015 Blade using a Plasma Electrode with Weather Resistant Design

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2022年第1期31卷 72-81页

作者： MATSUDA Hisashi CHIBA Takahiro YAGAMI Masaki TAJIMA yusuke WATANABE Nobuyoshi SATO Hideaki TAKEYAMA Masafumi Hokkaido University of Science Hokkaido 006-8585Japan Asahi Rubber Inc. Saitama 330-0801Japan

The plasma actuation (PA) effect on the snow falling flow was investigated using a plasma electrode with weather resistant design and the natural snow wind facility of the Hokkaido University of Science. NACA0015 test blade with chord length c of 300 mm was used. Wind tunnel tests were carried out under the angle of the attack of the blade was fixed at 15 degrees, and the main flow velocity is U=5 m/s. PIV (Particle image velocimetry) measurements were conducted on various PA conditions using natural dry snowflakes as a tracer. When the actuator was driven under the condition of the fundamental frequency of F=50 kHz, and the pulsed modulated frequency f of fc/U=1 and Duty ratio (Ratio of plasma ON time to pulse duration time) =1%, movement of snowflakes was controlled the most effectively tested. It was clarified that the fundamental frequency of PA also affects the control of snow flow. Under snowfall conditions, the weather resistant designed plasma electrode has suffered no damage and operated successfully.

关键词： plasma actuator weather resistant design snow falling flow control experiment PIV

Measurement Method of Internal Residual Stress in Plastic Parts Using Terahertz Spectroscopy

在线全文

学校读者我要写书评

暂无评论

Nanomanufacturing and Metrology 2021年第1期4卷 46-52页

作者： yusuke Kajihara Rio Takahashi Ichiro Yoshida Shingo Saito Norihiko Sekine Shuichi Nowatari Shigeo Miyake Institute of Industrial Science The University of TokyoKomaba 4-6-K Meguro-kuTokyoJapan Hosei University Kajino 3-7-2.KoganeiTokyoJapan National Institute of Information and Communications Technology Nukui-Kitamachi 4-2-1KoganeiTokyoJapan Iida Co. LtdNukazawa Mizukami 21-2MotomiyiaFukushimaJapan

Since internal residual stress in polymers causes dimension errors over time,a measurement method for residual stress in polymers,especially in opaque engineering plastics,is strongly *** this study,we propose to utilize terahertz(THz)spectroscopy to non-destructively measure internal residual stress in *** verify the validity of the proposed method,we manufactured polytetrafluoroethylene ring samples with and without residual stress,and studied them with THz time domain spectroscopy *** spectra of samples without residual stress showed almost no polarization difference,whereas spectra of samples with residual stress showed clear polarization *** changes between the samples with and without residual stress were also estimated and it was found that the change had a correlation with THz polarization *** experimental analyses confirm the validity for the proposed non-destructive measurement of residual stress in polymer.

关键词： Engineering plastics Residual stress Polarization Terahertz spectroscopy

Hepcidin/ferroportin expression levels involve efficacy of pegylated-interferon plus ribavirin in hepatitis C virusinfected liver

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2015年第11期21卷 3291-3299页

作者： Motoyuki Kohjima Tsuyoshi Yoshimoto Munechika Enjoji Nobuyoshi fukushima Kunitaka Fukuizumi Tsukasa Nakamura Miho Kurokawa Nao Fujimori yusuke Sasaki Yasushi Shimonaka yusuke Murata Susumu Koyama Ken Kawabe Kazuhiro Haraguchi Yorinobu Sumida Naohiko Harada Masaki Kato Kazuhiro Kotoh Makoto Nakamuta Department of Gastroenterology and Clinical Research Center National Hospital Organization Kyushu Medical Center Health Care Center Fukuoka University Product Research Department Chugai Pharmaceutical Co.Ltd. Department of Medicine and Bioregulatory Science Kyushu University

AIM:To investigate the relationship between the ironmetabolism-related gene expression profiles and efficacy of antiviral therapy in chronic hepatitis C ***:The hepatic expression profile of ironmetabolism-related genes was analyzed and its association with virological response to pegylated-interferon plus ribavirin combination therapy was evaluated.A hundred patients with chronic hepatitis C(genotype1b,n = 50; genotype 2,n = 50) were enrolled and retrospectively *** biopsy samples were subjected to quantitative polymerase chain reaction for iron-metabolismrelated genes and protein expression(Western blotting analysis) for *** a control,normal liver tissue was obtained from 18 living donors of liver *** hepcidin level was measured by sensitive liquid chromatography/electrospray ionization tandem mass ***:Iron overload is associated with liver damage by increasing oxidative stress and hepatitis C virus(HCV)is reported to induce iron accumulation in hepatocytes in ***,iron administration suppresses HCV replication in ***,the association between HCV infection and iron metabolism remains *** with controls,patients had significantly higher gene expression for transferrin,iron-regulatoryproteins 1 and 2,divalent metal transporter 1,and ferroportin,but similar for transferrin receptors 1 and2,and *** the expression profiles were compared between sustained virological response(SVR)and non-SVR patients,the former showed significantly lower transcription and protein expression of hepcidin and *** of hepcidin-regulating genes,BMPR1,BMPR2,and hemojuvelin,was significantly increased,whereas BMP2 was decreased in HCV-infected ***2 and hemojuvelin expression was significantly lower in the SVR than non-SVR *** infection affects the expression of iron-metabolism-related genes,leading to iron accumulation in ***:Decrea

关键词： Chronic hepatitis C Iron-metabolism Hepcidin Ferro

Prognostic factors in heart failure patients with cardiac cachexia

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2020年第1期17卷 26-34页

作者： Yu Sato Akiomi Yoshihisa yusuke Kimishima Tetsuro Yokokawa Satoshi Abe Takeshi Shimizu Tomofumi Misaka Shinya Yamada Takamasa Sato Takashi Kaneshiro Masayoshi Oikawa Atsushi Kobayashi Takayoshi Yamaki Hiroyuki Kunii Yasuchika Takeishi Department of Cardiovascular Medicine Fukushima Medical UniversityFukushimaJapan Department of Advanced Cardiac Therapeutics Fukushima Medical UniversityFukushimaJapan

Objective To clarify whether cardiac cachexia(CC)alters the prognostic impact of other general risk factors in patients with heart failure(HF).Methods This was an observational *** was defined as the combination of a body mass index of5 mg/L;hemoglobin<12 g/dL;and/or albumin<3.2 g/d *** divided 1608 hospitalized HF patients into a CC group(n=176,10.9%)and a non-CC group(n=1432,89.1%).The primary endpoints were cardiac event and all-cause *** The presence of CC showed significant interactions with other risk factors including cancer,estimated glomerular filtration rate(eGFR),and sodium in predicting these *** Cox proportional analysis revealed that use of a blockers[hazard ratio(HR)=1.900,95%confidence interval(CI):1.045–3.455,P=0.035]and eGFR(HR=0.989,95%CI:0.980–0.998,P=0.018)were independent predictors of cardiac event in the CC group,while age(HR=1.020,95%CI:1.002–1.039,P=0.029)and hemoglobin(HR=0.844,95%CI:0.734–0.970,P=0.017)were independent predictors of all-cause *** survival classification and regression tree analysis showed the optimal cut-off points for cardiac event(eGFR:59.9 m L/min per 1.73 m^2)and all-cause death(age,83 years old;hemoglobin,10.1 g/dL)in the CC *** In predicting prognosis,CC showed interactions with several risk *** function,age,and hemoglobin were pivotal markers in HF patients with CC.

关键词： Body mass index Cachexia Heart failure Mortality Prognosis

X-Ray Induced Mutation Frequency at the <i>Hypoxanthine Phosphoribosyltransferase</i>Locus in Clinically Relevant Radioresistant Cells

在线全文

学校读者我要写书评

暂无评论

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2017年第4期6卷 377-391页

作者： Yoshikazu Kuwahara Mehryar Habibi Roudkenar yusuke Urushihara Yohei Saito Kazuo Tomita Amaneh Mohammadi Roushandeh Tomoaki Sato Akihiro Kurimasa Manabu Fukumoto Division of Radiation Biology and Medicine Faculty of Medicine Tohoku Medical and Pharmaceutical University Sendai Japan Department of Applied Pharmacology Graduate School of Medical and Dental Sciences Kagoshima University Kagoshima Japan Medical Biotechnology Research Center Paramedicine Faculty Guilan University of Medical Science Rasht Iran fukushima Project Headquarters National Institute for Quantum and Radiological Science and Technology Fukushima Japan Department of Radiopharmacy Faculty of Pharmaceutical Science Tohoku Medical and Pharmaceutical University Sendai Japan Department of Anatomical Sciences School of Medicine Hamadan University of Medical Sciences Hamadan Iran Department of Molecular Pathology Tokyo Medical University Tokyo Japan

To elucidate the molecular mechanisms underlying cellular radioresistance, clinically relevant radioresistant cell lines were established via long-term exposure to X-rays with stepwise dose escalation. Established cells continue to proliferate despite exposure to 2 Gy X-rays/day for more than 30 days, a standard protocol in cancer radiotherapy. DNA repair fidelity in radioresistant and the parental cells by evaluating the mutation frequency at the hypoxanthine phosphoribosyltransferase (HPRT) locus after exposure to X-rays was determined. Mutation spectrum at the HPRT locus was examined by multiplex polymerase chain reaction. Rejoining kinetics of X-ray-induced DNA double strand breaks (dsbs) was evaluated by the detection of phosphorylated histone H2AX (γH2AX) after X-irradiation. The fold increase in the HPRT mutation frequency due to acute radiation was similar between radioresistant and the parental cell lines. However, fractionated radiation (FR) consisting of 2 Gy X-rays/day increased the mutation frequency at the HPRT locus in parental but not in radioresistant cells. Analysis of the FR-induced mutations at the HPRT locus revealed a high frequency of deletion mutations (>70%) in parental but not in radioresistant cells. As assessed by γH2AX immunostaining, DNA dsbs induced by acute exposure to 10 Gy of X-rays were repaired to the control level within 7 days in radioresistant but not in the parental cells. Moreover, 2 Gy × 5 FR increased the number of γH2AX-positive cells in parental cultures but not in radioresistant cultures. DNA dsbs induced by 2 Gy/day FR are repaired with fidelity in radioresistant but not in parental cells.

关键词： Clinically Relevant Radioresistant (CRR) Cell Hypoxanthine Phosphoribosyltransferase (HPRT) Mutation Frequency Phosphorylated Histone H2AX (γH2AX) X-Rays

利用1-Hz GPS波形数据反演2011年日本东北大地震震源破裂过程

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

地震 2013年第3期33卷 13-23页

作者：王振孟国杰横田佑助苏小宁中国地震局地震预测重点实验室中国地震局地震预测研究所北京100036 日本东京大学地震研究所

利用1-Hz GPS数据反演2011年3月日本东北大地震的时空破裂过程,通过理论波形图与观测波形图的拟合,以及ABIC准则的判定,反演得到滑移分布的稳定估计。结果表明:破裂集中在震源附近,并在震中以下30km处达到最大位错量,约72m,在岩手和福... 详细信息

利用1-Hz GPS数据反演2011年3月日本东北大地震的时空破裂过程,通过理论波形图与观测波形图的拟合,以及ABIC准则的判定,反演得到滑移分布的稳定估计。结果表明:破裂集中在震源附近,并在震中以下30km处达到最大位错量,约72m,在岩手和福岛靠近海岸线处有两个较小的破裂区,断层的南半段破裂很小,同时也是余震最为密集的地方。整个破裂过程由3个破裂阶段组成,发震后断层从震源向周围缓慢破裂,在50～60s破裂延伸至地表(海沟);60～90s在震中下方迅速发生强烈破裂,形成了最大位错区,这一阶段主要是倾向上的双边破裂;90～120s在断层最北西处和断层南半段发生较小破裂,整个破裂过程持续大约120s。反演得到的地震矩为3.8×1022 Nm,相应的矩震级为MW9.0。

关键词： 1-Hz GPS ABIC 破裂过程反演日本9 0级地震