检索结果-南通市图书馆

ON CORRELATION OF CAVITATION EROSION AND NOISE ON A FOIL SECTION

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of hydrodynamics 1990年第3期2卷 88-96页

作者： kato h Maeda M University of Tokyo 7-3-1HongoBunkyo-KuTokyo 113Japan

Tests with two different sized models were conducted in the Marine Propeller Cavitation Tunnel at the Univer- sity of *** two angles of attack the developed sheet-cloud and bubble cavitation *** pattern was recorded by pure indium specimens and noise was measured with a hydrophone mounted inside the *** broadband SPL was mainly used for correlation of noise with pit counting results from *** case of sheet- cloud cavitation power law relations between velocity and SPL have been found and there existed a linear relation- ship between SPL values and IgPR values(PR-pitting rate).however in case of bubble cavitation such power law relation does not exist between pitting rate and velocity,and neither between SPL and *** was noticed that the different trends of SPL for these two different types of cavitation could be qualitatively linked to their pitting rates by using some SPL values at high center frequencies.

关键词： ON CORRELATION OF CAVITATION EROSION AND NOISE ON A FOIL SECTION PP NACA

Inhomogeneous dealloying kinetics along grain boundaries during liquid metal dealloying

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第11期106卷 41-48页

作者： S.-h.Joo Y.B.Jeong T.Wada I.V.Okulov h.kato Department of Materials Science and Engineering Dankook University119 Dandae-roCheonan 31116Korea Institute for Materials Research Tohoku UniversityKatahira 2-1-1Sendai 980-8577Japan Institute of Natural Sciences and Mathematics Ural Federal University620000 EkaterinburgRussia Faculty of Production Engineering University of BremenBadgasteiner Str.128359 BremenGermany Leibniz Institute for Materials Engineering-IWT Badgasteiner Str.328359 BremenGermany

In this study, the inhomogeneous dealloying phenomenon during the liquid metal dealloying(LMD) was investigated using FeNi+Mg and(FeCo)Ni+Mg systems. For the FeNi+Mg system, the inhomogeneous dealloying and wetting of Mg melt occurred along triple junction(TJ) and grain boundary(GB).Temperature increase enhances the inhomogeneous dealloying kinetics and leads to the formation of the plate-shaped abnormal ligaments at the GB region. The energy banlance between a GB energy(γGB)and solid-liquid interface energies(γsl) is the key factor governing the inhomogeneous dealloying and wetting. Particularly, the low-energy twin boundaries were unaffected by the inhomogeneous ***, precursor microstructure is an important factor determining the final morphology of dealloyed material as well as its physical properties. In the case of the(FeCo)Niprecursor, all TJ and GB were stable against the preferred penetration of Mg melt from 600 ℃ to 800 ℃. It was concluded that a minor addition of alloying elements(VorCr) changes GB characteristics as well as γslof the precursor ***, this significantly influences dealloying mechanisms and final morphology of the dealloyed material. The current findings demonstrate the importance of GB engineering in the precursor materials for the technological application of liquid metal dealloying for the synthesis of advanced structural and functional materials.

关键词： Liquid metal dealloying Inhomogeneous dealloying Dealloying mechanism Abnormal ligament Porous material

Benchmark Integral Cross Sections for Electron Impact Excitation of the n=2 States in helium

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2010年第3期12卷 348-352页

作者： M.hOShINO h.kato D.SUZUKI h.TANAKA I.BRAY D.V.FURSA S.J.BUCKMAN O.INGLFSSON M.J.BRUNGER Department of Physics Sophia University Centre for Antimatter-Matter Studies Curtin University of Technology Centre for Antimatter-Matter Studies Australian National University Department of Chemistry University of IcelandScience Institute Centre for Antimatter-Matter Studies Flinders University

In this paper, we present integral cross sections （ICS） for electron impact excitation of the n = 2 levels in helium in the impact energy range of 23.5 eV to 35 eV. The ICS of each final state, 2^3S, 2^1S, 2^3P and 2^1P, has been determined by integration of the angular differential cross sections （DCS） over all of 0° to 180°, where those DCS were obtained from both our previous experiments and the extrapolation using the convergent close coupling calculation. The present experimental ICS for the optically allowed 21P transition state are also compared with those obtained from the BE f-scaling method. Very good agreement between the experimental and BE f-scaled 21P ICSs is generally found in the measured impact energy region.

关键词： low energy electron impact electronic excitations helium

Master-slave Control of Tele-operated hydraulic Construction Robot Based on Load Force and Impedance Identifiers

在线全文

学校读者我要写书评

暂无评论

Master-slave Control of Tele-operated Hydraulic Construction...

Dynamic mechanical relaxation behavior of Zr_(35)hf_(17.5)Ti_(5.5)Al_(12.5)Co_(7.5)Ni_(12)Cu_(10)high entropy bulk metallic glass

第五届流体传动与控制国际会议

作者： Yamda h. kato h. Department of Mechanical and Systems Engineering Gifu University501-1193Japan Department of Mechanical and Systems Engineering Gifu University501-1193Japan

＜正＞A master-slave control method based on load force and impedance identifiers for Tele-operated hydraulic construction robot system is proposed in this *** robot system is composed of a hydraulic excavator and two *** hydraulic excavator is served as the construction *** joysticks are used to operate the robot in a remote *** master actuator and the slave actuator in this system are the joystick-gear and the fork-glove actuator of excavator *** load force and impedance identifiers are respectively used to identify the load force and impedance of slave *** to load force, master controller controls master actuator to generate reaction force to *** the basis of impedance and master slave error,slave controller controls slave actuator to perform working *** experimental researches on proposed method confirm that the operator not only can obtain force sense accurately,but also can obtain the sense of deformation and stiffness of objects obviously.

关键词： tele-operated construction robot master-slave control identifier

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2021年第24期83卷 248-255页

作者： L.T.Zhang Y.J.Duan T.Wada h.kato J.M.Pelletier D.Crespo E.Pineda J.C.Qiao School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an710072China Institute for Materials Research Tohoku UniversitySendai980-8577Japan Universitéde Lyon MATEISUMR CNRS5510Bat.B.PascalINSA-LyonF-69621Villeurbanne CedexFrance Department of Physics Barcelona Research Center in Multiscale Science and TechnologyInstitute of Energy TechnologiesUniversitat Politècnica de Catalunya08019BarcelonaSpain

Non-equiatomic high entropy bulk metallic glasses were reported recently and show unique mechanical and physical *** mechanical relaxation behavior of Zr_(35)hf_(17.5)Ti_(5.5)Al_(12.5)Co_(7.5)Ni_(12)Cu_(10)high entropy bulk metallic glass was investigated by dynamic mechanical analysis(DMA)and the mechanical spectra could be well described by the quasi-point defects(QPD)*** to typical metallic glasses,the intensity of theβrelaxation of Zr_(35)hf_(17.5)Ti_(5.5)Al_(12.5)Co_(7.5)Ni_(12)Cu_(10)high entropy bulk metallic glass is lower due to the sluggish *** the same time,the correlation factor is higher than that of conventional metallic glasses and this is ascribed to the high configuration *** parallel,physical aging below the glass transition temperature leads to a decrease of atomic mobility,caused by a decrease of the concentration of defects.

关键词： high entropy bulk metallic glass Mechanical relaxation Quasi-point defects Physical aging

Analysis of the anelastic deformation of high-entropy Pd_(20)Pt_(20)Cu_(20)Ni_(20)P_(20) metallic glass under stress relaxation and recovery

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第12期107卷 82-91页

作者： Y.J.Duan L.T.Zhang T.Wada h.kato E.Pineda D.Crespo J.M.Pelletier J.C.Qiao School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an 710072China Department of Physics Institute of Energy TechnologiesUniversitat Politècnica de CatalunyaBarcelona 08019Spain Institute for Materials Research Tohoku UniversitySendai 980-8577Japan Universitéde Lyon MATEISUMR CNRS5510Bat.B.PascalINSA-LyonF-69621 Villeurbanne CedexFrance

The anelastic deformation behavior of Pd_(20)Pt_(20)Cu_(20)Ni_(20)P_(20) high-entropy metallic glass was probed by monitoring the stress relaxation and recovery processes. The stress relaxation under consecutive strain steps can be described by the Kohlrausch-Williams-Watts(KWW) function. In addition, considering a hierarchy of relaxation processes related to the structural heterogeneity, a constitutive model is proposed in order to describe the whole process of stress relaxation and determine the contribution of different time scales. Moreover, a crossover from stochastic activation to percolation of flow defects with the ultimate strain can be observed during stress relaxation process. The anelastic recovery process after a strain step is studied as a function of the initial strain level and characterized by means of a direct spectrum analysis. The peaks in the recovery time-spectra revealed the evolution of flow defects in Pd_(20)Pt_(20)Cu_(20)Ni_(20)P_(20) high-entropy metallic glass. The understanding of the atomic free-volume zones effect and the anelastic deformation provides important insight into how atomic structural features affect the deformation behavior of high-entropy metallic glasses, and may provide a new avenue into the improvement of their mechanical properties.

关键词： high-entropy metallic glass Stress relaxation Anelastic deformation Flow defects Free-volume zones

DPY19L3 promotes vasculogenicmimicry by its C-mannosyltransferase activity

在线全文

学校读者我要写书评

暂无评论

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

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

聚氯丁二烯多效硫化体系的发展

橡胶译丛 1984年第2期 15-21页

作者： h.kato 张学义

引言鉴于氯丁橡胶的硫化促进剂NA-22对环境污染的原因,本文作者早先就已经提出了以AD-9(2,2′,4,4′-四羟基二苯硫)作为一种新型的化合物代替2—硫醇基咪唑啉NA-22,AD-9对于氯丁橡胶显示出极好的硫化促进作用,使硫化胶具有良好的物理性... 详细信息

引言鉴于氯丁橡胶的硫化促进剂NA-22对环境污染的原因,本文作者早先就已经提出了以AD-9(2,2′,4,4′-四羟基二苯硫)作为一种新型的化合物代替2—硫醇基咪唑啉NA-22,AD-9对于氯丁橡胶显示出极好的硫化促进作用,使硫化胶具有良好的物理性能。可见,AD-9

关键词：促进剂硫化胶老化性能定伸强度兆帕氯丁胶物理机械性能胶料

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

川崎病冠状动脉病变的治疗效果

国外医学(儿科学分册) 1980年第4期07卷 212-214页

作者： kato h 杜敏联

川崎病(皮肤粘膜淋巴结综合征,简称MCLS)是近来所认识的婴幼儿期的临床综合征,它有高热、特征性粘膜皮肤病损及颈淋巴结肿大,因冠状动脉炎伴发动脉瘤和血栓性闭塞引起猝死而令人关注。本病病因未明,尚无有效治疗,故探索冠状动脉病变治... 详细信息

川崎病(皮肤粘膜淋巴结综合征,简称MCLS)是近来所认识的婴幼儿期的临床综合征,它有高热、特征性粘膜皮肤病损及颈淋巴结肿大,因冠状动脉炎伴发动脉瘤和血栓性闭塞引起猝死而令人关注。本病病因未明,尚无有效治疗,故探索冠状动脉病变治疗的有效疗法是燃眉之需。本文研究了几组治疗方案对冠状动脉病变的效果。病例和方法被确诊为MCLS的92例患者,不按病情轻重采用5种方案:(1)在起病1周内开始用强的松龙2～3 mg/kg/日,持续至少2周,直至临床症状消失和血沉降至20mm/小时以下后,

关键词：冠状动脉病变强的松龙冠状动脉瘤氢化泼尼松川崎病阿斯匹林双香豆素冠脉造影心血管造影冠状动脉造影