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Study of Solidification Shrinkage of Ductile Iron in Dry Sand Molds

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Journal of Materials Science & Technology 1999年第3期15卷 245-250页

作者： Li, jr Liu, BC Beijing Inst Aeronaut mat Beijing 100095 Peoples R China Tsing Hua Univ Dept Engn Mech Beijing 100084 Peoples R China

The effects of metallurgical and processing parameters on the formation of solidification shrinkage in ductile iron have been studied, considering the parameters of carbon equivalent, inoculation, casting modulus and pouring temperature within specific ranges of these variables. Based on the orthogonal experiments, the metallurgical and processing parameters of the minimum casting shrinkage and the maximum casting shrinkage were obtained, and the effects of metallurgical and processing parameters on the formation of shrinkage cavities and porosities in ductile iron castings were discussed. A regression equation relating these variables to the formation of shrinkage was derived based upon the orthogonal experiments conducted.

关键词： Nodular iron

Extracting classification rules based on a cumulative probability distribution approach

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第5期12卷 379-386页

作者： jr-shian CHEN Department of Computer Science and Information Management Hungkuang University

This paper deals with a reinforced cumulative probability distribution approach (CpDA) based method for extracting classification *** method includes two phases:(1) automatic generation of the membership function,and (2) use of the corresponding linguistic data to extract classification *** proposed method can determine suitable interval boundaries for any given dataset based on its own characteristics,and generate the fuzzy membership functions *** results show that the proposed method surpasses traditional methods in accuracy.

关键词： Cumulative probability distribution approach (CpDA) Classification rule C4.5

Analytical Study of Moving Excitations for One-dimensional Homogeneous Lattice with Quartic Anharmonicity

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Journal of Materials Science & Technology 1999年第4期15卷 345-347页

作者： Zhou, GH Yan, jr Hunan Normal Univ Dept Phys Changsha 410081 Peoples R China Hunan Normal Univ Inst Nonlinear Sci Changsha 410081 Peoples R China Chinese Acad Sci Int Ctr Mat Phys Shenyang 110015 Peoples R China

The moving nonlinear excitations (intrinsic localized vibrational modes) for one-dimensional homogeneous monoatomic lattice with quartic anharmonicity are obtained analytically by means of the semidiscrete approximation, with which the carrier wave is treated explicitly while the envelope function is described in the continuum approximation. Besides the moving pulse-like type of excitations which was found previously in both analytical and numerical works, we find that the moving kink-like type of excitations can also exist. And the kink-like excitations appeared previously only in the stationary form for such a lattice system.

关键词： Crystalline materials

蛇绿岩成矿作用的熔融、结晶和构造控制—来自菲律宾吕宋岛Zambles蛇绿杂岩的例子

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世界地质 1993年第1期 103-103页

作者： Gractano p.yumul jr. 洪景鹏

比较特提斯、加里东和菲律宾西部盆地中外消减带(SSZ)蛇绿岩与洋中脊(MOR)蛇绿岩,可得出前者比后者含有更多的铬铁矿及块状硫化物矿床。铂族元素矿物(pGMs)在SSZ蛇绿岩中比在MOR蛇绿岩中也更加富集。菲律宾吕宋岛的Zambales蛇绿杂岩是SS... 详细信息

比较特提斯、加里东和菲律宾西部盆地中外消减带(SSZ)蛇绿岩与洋中脊(MOR)蛇绿岩,可得出前者比后者含有更多的铬铁矿及块状硫化物矿床。铂族元素矿物(pGMs)在SSZ蛇绿岩中比在MOR蛇绿岩中也更加富集。菲律宾吕宋岛的Zambales蛇绿杂岩是SSZ蛇绿岩,其中也含有这些类型的矿床。

关键词：蛇绿岩超基性岩 Zambles 蛇绿杂岩吕宋岛菲律宾

Ca^(2+) binding to the C_(2)E domain of otoferlin is required for hair cell exocytosis and hearing

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protein & Cell 2024年第4期15卷 305-312页

作者： Han Chen Mehar Monga Qinghua Fang Loujin Slitin Jakob Neef Shashank S.Chepurwar Regina Célia Mingroni Netto Karina Lezirovitz Alfredo Tabith,jr. Fritz Benseler Nils Brose Kathrin Kusch Carolin Wichmann Nicola Strenzke Barbara Vona Julia preobraschenski Tobias Moser Institute for Auditory Neuroscience and InnerEarLab University Medical Center Göttingen37075 GöttingenGermany Collaborative Research Center 889 University of Göttingen37075 GöttingenGermany Auditory Neuroscience and Synaptic Nanophysiology Group Max Planck Institute for Multidisciplinary Sciences37075 GöttingenGermany Göttingen Graduate Center for Neurosciences Biophysics and Molecular BiosciencesUniversity of Göttingen37075 GöttingenGermany Biochemistry of Membrane Dynamics Group Institute for Auditory NeuroscienceUniversity Medical Center Göttingen37075 GöttingenGermany Molecular Architecture of Synapses Group Institute for Auditory Neuroscience and InnerEarLabUniversity Medical Center Göttingen37075 GöttingenGermany Center for Biostructural Imaging of Neurodegeneration University Medical Center Göttingen37075 GöttingenGermany Auditory Systems physiology Group Institute for Auditory Neuroscience and InnerEarLabUniversity Medical Center Göttingen37075 GöttingenGermany Departamento de Genética e Biologia Evolutiva Centro de Pesquisas sobre o Genoma Humano e Células-TroncoInstituto de BiociênciasUniversidade de São PauloSão Paulo 05508-220Brazil Laboratório de Otorrinolaringologia/LIM32 Faculdade de MedicinaHospital das ClínicasUniversidade de São PauloSão PauloSP 05508-220Brazil DERDIC Pontifícia Universidade Católica de São PauloSão Paulo 05508-220Brazil Department of Molecular Neurobiology Max Planck Institute for Multidisciplinary Sciences37075 GöttingenGermany Multiscale Bioimaging Cluster of Excellence(MBExC) University of Göttingen37075 GöttingenGermany Functional Auditory Genomics Group Auditory Neuroscience and Optogenetics LaboratoryGerman Primate Center37077 GöttingenGermany Hearing Genomics Group Institute for Auditory Neuroscience and InnerEarLabUniversity Medical Center Göttingen37075 GöttingenGermany Institute of Human Genetics University Medical Center Göttingen37075 GöttingenGermany

Dear Editor,Afferent synapses of cochlear inner hair cells(IHCs)employ a unique molecular machinery(see extended background in Supplementary Materials).Otoferlin is a key player in this machinery and its defects cause human auditory synaptopathy(Moser and Starr,2016).Otoferlin,a tail-anchored(Vogl et al.,2016)multi-C_(2)-domain protein(Fig.1Ai)specific to hair cells(Roux et al.,2006),is a member of the ferlin protein family involved in membrane trafficking and repair that are of major disease relevance(pangršičet al.,2012),also see Supplementary *** is distributed broadly within IHCs(Fig.2Ai-Aiii;pangrsic et al.,2010;Roux et al.,2006).

关键词： auditory hair

Autophagy and ethanol-induced liver injury

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World Journal of Gastroenterology 2009年第10期15卷 1178-1185页

作者： Terrence M Donohue jr Liver Study Unit The Omaha Veterans Affairs Medical Center Department of Internal Medicine University of Nebraska Medical Center Omaha Nebraska 68105 United States

The majority of ethanol metabolism occurs in the liver. Consequently, this organ sustains the greatest damage from ethanol abuse. Ethanol consumption disturbs the delicate balance of protein homeostasis in the liver, causing intracellular protein accumulation due to a disruption of hepatic protein catabolism. Evidence indicates that ethanol or its metabolism impairs trafficking events in the liver, including the process of macroautophagy, which is the engulfment and degradation of cytoplasmic constituents by the lysosomal system. Autophagy is an essential, ongoing cellular process that is highly regulated by nutrients, endocrine factors and signaling pathways. A great number of the genes and gene products that govern the autophagic response have been characterized and the major metabolic and signaling pathways that activate or suppress autophagy have been identified. This review describes the process of autophagy, its regulation and the possible mechanisms by which ethanol disrupts the process of autophagic degradation. The implications of autophagic suppression are discussed in relation to the pathogenesis of alcohol-induced liver injury.

关键词： Autophagy Autophagosome Ethanolmetabolism Hepatomegaly Lysosomes Signal transduction

Is Brenner＇s Modification to the Classical Navier-Stokes Equations Able to Describe Sound propagation in Gases？

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Chinese physics Letters 2008年第4期25卷 1355-1358页

作者： W. Marques jr. Departamento de Fisica Universidade Federal do Parana Calxa Postal 19044 81531-990 Curitiba Brazil

We analyse the problem concerning the propagation of sound waves in gases by using the modified hydrodynamic theory proposed recently by Brenner for single-component fluids. The modifications introduced by Brenner are based on his proposal that the translational momentum in fluid motion is not given by the mass flux. Comparison of the sound propagation results derived from Brenner＇s theory with available experimental data for monatomic gases shows that this modified continuum theory is unable to describe the acoustic measurements not even in the low-frequency limit, a result that from our point of view makes Brenner＇s proposal questionable.

关键词： Modification Classical Navier-Stokes Equations Able

photoluminescent Tb^(3+)-based metal-organic framework as a sensor for detection of methanol in ethanol fuel

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Journal of Rare Earths 2019年第3期37卷 225-231页

作者： Ramon R.F.Fonseca Rafael D.L.Gaspar Ivo M.Raimundo jr. priscilla p.Luz Department of Chemistry Federal University of Espírito Santo Institute of Chemistry University of Campinas

The sensing capability of a Tb^(3+)-metal-organic framework, based on its photoluminescence, was used for detection of methanol in ethanol fuel. It was synthesized using terbium and trimesic acid as a metal ion center and ligand, respectively. powder X-ray diffraction, infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy were employed to characterize the synthesized MOF-76 structural features. According to the results, MOF-76 was successfully obtained with minor synthetic modification and its activated form(named TbTMA) was tested as a sensor for methanol. Tb^(3+) luminescence intensity increases as the methanol concentration in ethanol fuel also increases and the water content does not affect this response. Our findings indicate TbTMA as an appropriate sensor for evaluating ethanol fuel adulteration by methanol addition above the allowed limit.

关键词： Lanthanide Metal-organic frameworks Luminescence Ethanol fuel Sensor Adulteration

Fabrication and characterization of Cu–Zn–Sn shape memory alloys via an electrodeposition–annealing route

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International Journal of Minerals,Metallurgy and Materials 2019年第11期26卷 1436-1449页

作者： Richard Espiritu Alberto Amorsolo jr. Department of Mining Metallurgical and Materials Engineering University of the Philippines Diliman

Cu–Zn–Sn shape memory alloys(SMAs)with an average composition of 56.0 at%,36.1 at%,and 7.9 at%for Cu,Zn,and Sn,respectively,were successfully fabricated via an electrodeposition–annealing *** produced SMAs were assessed for shape memory response in terms of percent displacement(martensite phase recovery)by subjecting the ternary alloys to flame tests and subsequently characterizing them via differential scanning calorimetry(DSC),optical microscopy,scanning electron microscopy in conjunction with energy-dispersive spectroscopy(SEM-EDS),and X-ray diffraction(XRD)*** flame tests showed that the highest displacement was ca.93%,with average austenite and martensitic start transformation temperature of 225°C and 222°C,*** analysis revealed that the intermetallic phases responsible for the observed shape memory properties have substitutional Zn in the lattice occupied by Cu and Sn,leading to the formation of Cu(Zn,Sn)and Cu6(Zn,Sn)5 *** formation of these variants was attributed to the faster interdiffusion of Cu into Sn,driven by an activation energy of 34.82 kJ·mol^-*** cycles of repeated torching–annealing revealed an essentially constant shape memory response,suggesting that the fabricated SMAs were consistent and sufficiently reliable for their intended service application.

关键词： electrodeposition annealing intermetallics martensitic transformation shape memory alloy