检索结果-南通市图书馆

An Experimental Study on Aerodynamic Sound Generated from Wake Interaction of Circular Cylinder and Airfoil with Attack Angle in Tandem

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2008年第3期17卷 212-217页

作者： Mizue MUNEKATA Ryuta KOSHIISHI Hiroyuki YOSHIKAWA hideki OHBA Department of Mechanical System Engineering

In our previous study, the effects of the interval between the cylinder and the airfoil on the aerodynamic sound were investigated and compared with the cases of single circular and single airfoil. In this study, the effects of the attack angle of the airfoil located downstream on the characteristics of aerodynamic sound and the wake structure are investigated at a given interval between the cylinder and the airfoil. It is found that the sound pressure level of DFN and the peak frequency decrease with increasing attack angle of airfoil because of the diffusive wake structure due to the increased back pressure of circular cylinder, which is caused by the blocking effect of airfoil. It is shown that the sound sources are corresponded to the attack points of shedding vortex form the upstream circular cylinder to the downstream airfoil. We conclude that the pressure fluctuation at the airfoil surface effects on the sound pressure level, from the flow visualizations and the exploration test of sound source.

关键词： aerodynamic sound wake interaction circular cylinder airfoil Karman's vortex flow visualization

Contributions of the Secondary Jet to the Tangential Velocity Distribution and to the Collection Efficiency of the Fixed Guide Vane Type Axial Flow Cyclone Dust Collector

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2015年第6期24卷 503-509页

作者： Akira Ogawa hideki Anzou So Yamamoto Mituru Shimagaki 1.110-0011 Minowa 2-14-7 Taitou-Ku Tokyo Japan

In order to control the maximum tangential velocity V?m(m/s)of the turbulent rotational air flow and the collection efficiencyηc(%)using the fly ash of the mean diameter X R50=5.57?m,two secondary jet nozzles were installed to the body of the axial flow cyclone dust collector with the body diameter D1=*** in order to estimate V?m(m/s),the conservation theory of the angular momentum flux with Ogawa combined vortex model was *** comparisons of the estimated results of V?m(m/s)with the measured results by the cylindrical Pitot-tube were shown in good *** also the estimated collection efficienciesηcth(%)basing upon the cut-size Xc(?m)which was calculated by using the estimated V?m(m/s)and also the particle size distribution R(Xp)were shown a little higher values than the experimental results due to the re-entrainment of the collected *** best method for adjustment ofηc(%)related to the contribution of the secondary jet flow is principally to apply the centrifugal effect?c(1).Above stated results are described in detail.

关键词： Axial Flow Cyclone Dust Collector Maximum Tangential Velocity Cut-Size Particle Size Distribution Collection Efficiency Reynolds number Centrifugal Effect

Effects of Pulsation on Separated Flow and Heat Transfer in Enlarged Channel

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2011年第1期20卷 70-75页

作者： Hiroyuki YOSHIKAWA Tomonori KAI Mizue MUNEKATA hideki OHBA Dept.of Mechanical System Engineering Kumamoto University2-39-1 KurokamiKumamoto 860-8555Japan Graduate School of Science and Technology Kumamoto University2-39-1 KurokamiKumamoto 860-8555Japan Kikuyo KikuchiKumamoto 869-1101Japan

Numerical results of three-dimensional separated flow and heat transfer in an enlarged rectangular channel are presented in this *** expansion ratio and aspect ratio of the channel are 2.0 and 16.0,*** number of the flow is 200 and it is over the critical Reynolds *** the critical Reynolds number,the flow in the symmetric channel becomes asymmetric and deflects to one side of the *** of the pulsating fluctuation at the inlet upon the flow in the channel are *** is clarified that the inlet flow with a pulsating fluctuation of Strouhal number 0.05 and 0.10 strongly affects on the flow in the channel,and heat transfer on the walls is enhanced,especially on the wall surface covered with long separation *** the other hand,the pulsation of St=0.0125 oscillates the shear layer more weakly than that of St=0.05,0.10 and the enhancement of heat transfer is smaller,though some vortices are shed from the vicinity of the side wall near the reattachment *** oscillation of the main flow calms down gradually as the Strouhal number of the pulsation increases over *** influence of pulsation of St=0.20 on the flow is restricted in the near downstream of the step,and heat transfer on the walls is almost similar to that of the steady flow in the channel.

关键词： Pulsating Fluctuation Symmetric Enlarged Channel Separated Flow Heat Transfer

Prediction of GPCR-G Protein Coupling Specificity Using Features of Sequences and Biological Functions

在线全文

学校读者我要写书评

暂无评论

Genomics, Proteomics & Bioinformatics 2006年第4期4卷 238-244页

作者： Toshihide ono Haretsugu Hishigaki Laboratory of Bioinformatics Otsuka Pharmaceutical Co.Ltd.Kawauchi-choTokushima 771-0192Japan.

Understanding the coupling specificity between G protein-coupled receptors （GPCRs） and specific classes of G proteins is important for further elucidation of receptor functions within a cell. Increasing information on GPCR sequences and the G protein family would facilitate prediction of the coupling properties of GPCRs. In this study, we describe a novel approach for predicting the coupling specificity between GPCRs and G proteins. This method uses not only GPCR sequences but also the functional knowledge generated by natural language processing, and can achieve 92.2% prediction accuracy by using the C4.5 algorithm. Furthermore, rules related to GPCR-G protein coupling are generated. The combination of sequence analysis and text mining improves the prediction accuracy for GPCR-G protein coupling specificity, and also provides clues for understanding GPCR signaling.

关键词： GPCR G protein coupling specificity NLP C4.5 text mining

Estrogen receptors as the novel therapeutic biomarker in non-small cell lung cancer

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Oncology 2014年第5期5卷 1020-1027页

作者： hideki Kawai Department of Thoracic Surgery Akita Red Cross Hospital Kamikitate Akita 010-1495 Japan

Although a wide range of studies have addressed the relationship between estrogen receptor(ER) expression and prognosis in non-small cell lung cancer(NSCLC), that relationship remains controversial. This is in large part because there is no consensus on the rate of ER expression in NSCLC or on the intracellular distribution of ER expression. This suggests that establishing the relationship between ER expression and prognosis will require standardization of the antibodies used as well as the definition of a positive response. For example, it is supposed from previous studies that ERs in the cytoplasm and nucleus have different relationships to prognosis than ERs in the cytoplasm. Moreover, ER signaling in NSCLC is known to be affected by aromatase, progesterone receptor and epidermal growth factor receptor mutation. However, there has been little functional analysis these mutants and subtypes. This review will focus on what is known about the role of ERs in NSCLC and whether ER can be a useful prognostic marker or therapeutic target in NSCLC.

关键词： Estrogen receptor Non-small cell lung cancer Epidermal growth factor receptor Fulvestrant Combined therapy

Numerical Study on Particle Motions in Swirling Flows in a Cyclone Separator

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 Thermal Science 2006年第2期15卷 181-185页

作者： Kazuyoshi MATSUZAKI Hideaki USHIJIMA Mizue MUNEKATA hideki OHBA Tokyo Electron LTD. 650 Mitsuzawa Hosaka-cho Nirasaki Yamanashi 407-0192 Japan Kumamoto University 2-39-1 Kurokami Kumamoto 860-8555 Japan

The purpose of this study is to establish the high-accurate prediction method of particle separation in a cyclone separator. Numerical simulation of the swirling flows in a cyclone separator is performed by using a large eddy simulation （LES） based on a Smagorinsky model. The validity of the simulation and the complicated flow characteristics are discussed by comparison with experimental results. Moreover, particle motions are treated by a Lagrangian method and are calculated with a one-way method. A performance for particle separation is predicted from the results of the particle tracing. As results of our investigation, the influences of the inserted height of the outlet pipe on the performance for particle separation of cyclone separator are shown.

关键词： cyclone separator swirling flow particle motion large eddy simulation

Interoperability for Global Observation Data by Ontological Information

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2008年第S1期13卷 336-342页

作者： Masahiko Nagai Masafumi ono Ryosuke Shibasaki Earth Observation Data Integration and Fusion Research Initiative (EDITORIA) The University of Tokyo Center for Spatial Information Science The University of Tokyo

The Ontology registry system is developed to collect, manage, and compare ontological information for integrating global observation data. Data sharing and data service such as support of metadata deign, structuring of data contents, support of text mining are applied for better use of data as data interoperability. Semantic network dictionary and gazetteers are constructed as a trans-disciplinary dictionary. Ontological information is added to the system by digitalizing text based dictionaries, developing 'knowledge writing tool' for experts, and extracting semantic relations from authoritative documents with natural language processing technique. The system is developed to collect lexicographic ontology and geographic ontology.

关键词： ontology interoperability data integration gazetteer semantic network dictionary

Visual acuity after intravitreal ranibizumab with and without laser therapy in the treatment of macular edema due to branch retinal vein occlusion:a 12-month retrospective analysis

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2021年第10期14卷 1565-1570页

作者： Reiko Umeya Koichi ono Toshimitsu Kasuga Department of Ophthalmology Juntendo Tokyo Koto Geriatric Medical CenterTokyo 136-0075Japan Department of Ophthalmology Juntendo University School of MedicineTokyo 113-8421Japan

AIM:To identify factors contributing to visual improvement after treatment of macular edema(ME)secondary to branch retinal vein occlusion(BRVO),and to assess the interaction between laser therapy and intravitreal ranibizumab(IVR).METHODS:We retrospectively reviewed the medical records of patients who had been treated for BRVO-related ME at our *** were traceable for at least 12 mo,and evaluated factors included age,sex,medical history,smoking history,treatment methods,foveal hemorrhage,and change in visual *** included laser therapy,IVR,sub-Tenon’s capsule injection of triamcinolone(STTA),a combination,or no *** logistic regression analysis and interaction terms were used to assess the clinical efficacy of the treatments,and odds ratios(OR)and 95%confidence intervals(CI)were ***:Seventy-three patients(34 men,39 women;73 eyes)with a mean age of 69.4±12.1 y were *** who underwent IVR monotherapy,laser monotherapy,and STTA+laser had significantly higher best corrected visual acuity at 12 mo compared to baseline(P<0.001,<0.001,and 0.019,respectively).Logistic regression analysis without interaction terms found that IVR was a significant visual acuity recovery factor(adjusted OR:3.89,95%CI:1.25-12.1,P=0.019).Adjusted OR using an interaction model by logistic regression was 16.6(95%CI:2.54-108.47,P=0.003)with IVR treatment,and 8.25(95%CI:1.34-50.57,P=0.023)with laser *** interaction was observed(adjusted OR:0.07,95%CI:0.01-0.75,P=0.029).CONCLUSION:IVR contributes to improvements in visual acuity at 12 mo in ME secondary to *** interaction is observed between laser therapy and IVR treatments.

关键词： interaction ranibizumab laser macular edema branch retinal vein occlusion

Classification of solar sail attitude dynamics with and without angular momentum

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

Astrodynamics 2019年第3期3卷 207-216页

作者： Yuichi Tsuda Go ono Yuya Mimasu Institute of Space and Astronautical Science Japan Aerospace Exploration AgencySagamihara252-5210Japan Japan Aerospace Exploration Agency Sagamihara252-5210Japan

This paper describes attitude dynamics properties of spinning,momentum-biased and zero-momentum solar sail *** model called“Generalized Sail Dynamics Model”(GSDM)is introduced,which can deal with general and practical sail configurations,such as arbitrary optical property distribution,shape and surface *** stability criteria and other key dynamical characteristics are derived and compared by compact analytical equations induced from the *** newly derived zero-momentum sail dynamics is compared with that of spinning and momentum-biased *** is shown that the spinning and momentum sails have an advantage in terms of dynamical stability whereas zero-momentum sails are only statically *** this special property,angular momentum-stabilized sails can realize a sun-pointing stable attitude with almost zero-fuel,which are discussed with actual space flight experience of the JAXA’s two interplanetary missions,IKAROS and Hayabusa2.

关键词： solar sail attitude dynamics stability solar system exploration