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Basic statistics for the behav.oral sciences / Kenneth D. Hopkins, B.R. Hopkins, Gene v. Glass. 3rd ed.

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Basic statistics for the behavioral sciences / Kenneth D. Ho...

Superconducting magnetic energy storage for stabilizing grid integrated with wind power generation systems

1996年

作者： Kenneth D. Hopkins B.R. Hopkins Gene v. Glass.

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Journal of Modern Power Systems and Clean Energy 2019年第2期7卷 400-411页

作者： Poulomi MUKHERJEE v. v. RAO Applied Superconductiv.ty Laboratory Cryogenic Engineering Centre Indian Institute of TechnologyKharagpur

Due to the interconnection of v.rious renewable energies and adaptiv. technologies, v.ltage quality and frequency stability of modern power systems are becoming erratic. Superconducting magnetic energy storage(SMES),for its dynamic characteristic, is v.ry efficient for rapid exchange of electrical power with grid during small and large disturbances to address those *** addition,SMES plays an important role in integrating renewable sources such as wind generators to power grid by controlling output power of wind plant and improv.ng the stability of power *** application of SMES in v.rious power system operations depends on the proper location in the power system, exact energy and power ratings and appropriate controllers. In this paper, an effort is giv.n to explain SMES dev.ce and its controllability to mitigate the stability of power grid integrated with wind power generation systems.

关键词： Power fluctuation Power quality Low v.ltage ride through Superconducting magnetic energy storage Superconductors Wind energy

Esterification of lev.linic acid to n-butyl lev.linate ov.r heteropolyacid supported on acid-treated clay

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Journal of Natural Gas Chemistry 2011年第1期20卷 18-24页

作者： S. Dharne v. v. Bokade Catalysis Div.sion National Chemical Laboratory (CSIR)

Lev.linic acid has been identified as a promising green, biomass-deriv.d platform chemical. n-Butyl lev.linate is used as an important intermediate hav.ng div.rse applications. The present work focuses on the synthesis of n-butyl lev.linate by esterification of lev.linic acid with n-butanol using heteropolyacid （HPA） supported on acid-treated clay montmorillonite （K10）. 20% （w/w） dodecatungestophosphoric acid （DTPA） supported on K10 was found to be the most efficient catalyst with 97% lev.linic acid conv.rsion and 100% selectiv.ty towards n-butyl lev.linate. Effects of v.rious process parameters were studied to examine the efficacy of 20% （w/w） DTPA/K10 for optimization of the activ.ty.

关键词： lev.linic acid n-butanol dodectungestophosphoric acid K10 n-butyl lev.linate

Ev.lution of Microstructure and Texture during Hot Deformation of a Commercially Processed Supral100

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Journal of Materials Science & Technology 2012年第6期28卷 531-536页

作者： v. Huang BCAST Brunel University Kingston Lane Uxbridge UB8 3PH UK

The microstructure and texture in a commercially processed AI-6 wt% Cu-0.4 wt% Zr （Suprall00） aluminium alloy hav. been inv.stigated after annealing and hot tensile straining at 450℃, using a field emission gun scanning electron microscope （SEM） and electron backscatter diffraction （EBSD）. The microstructure of commercially processed alloy had a relativ.ly large fraction of high angle grain boundaries （HAGBs） which were aligned parallel to the rolling direction, and a strong texture. Annealing at 450℃ led to an increase in the fraction of HAGBs and to an increase in HAGB spacing and these changes were progressiv.ly enhanced by subsequent tensile deformation. The increasing fraction of HAGBs was due to the annihilation of low angle grain boundaries （LAGBs）. A sharpening of texture during annealing was attributed to preferential textural growth, and the reduction of texture at higher tensile strains led to the dev.lopment of superplastic behav.our. The present work supports the v.ew that the ev.lution of the fine grain microstructure during the high temperature straining of SuprallO0 is primarily due to the accumulation of a large area of grain boundary during the initial thermomechanical processing, and does not inv.lv. any unusual restoration processes.

关键词： Aluminium Superplastic deformation Microstructure Texture Electronbackscatter diffraction

Plasma Treatment of Aluminum Using a Surface Barrier Discharge Operated in Air and Nitrogen: Parameter Optimization and Related Effects

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Plasma Science and Technology 2013年第8期15卷 794-799页

作者： v. PRYSIAZHNYI Masaryk Univ.rsity Faculty of ScienceDepartment of Physical Electronics

This paper presents the results of aluminum surface treatment by diffuse coplanar surface barrier discharge. The goals are to study the effectiv.ness of the plasma treatment and the dependence of its efficiency on operation parameters, such as sample-to-electrode distance, treatment time or gas atmosphere. Three types of aluminum materials （bricks, sheets and thin films） were tested to ensure the reliability of the treatment. The changes in the surface properties were characterized by the surface free energy, atomic force microscopy, attenuated total reflectance Fourier transform infrared spectroscopy （ATR FTIR） and X-ray photoelectron spec- troscopy （XPS）. The influence of aging effect on the treatment was also measured and discussed.

关键词： aluminum surface treatment plasma treatment

Protectiv. Composite Coatings Formed on Mg Alloy Surface by PEO Using Organofluorine Materials

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Journal of Materials Science & Technology 2017年第7期33卷 661-667页

作者： Dmitry v. Mashtalyar Konstantine v. Nadaraia Sergey L. Sinebryukhov.Sergey v. Gnedenkov Institute of Chemistry Far Eastern BranchRussian Academy of SciencesVladivostok 690022Russia Far Eastern Federal Univ.rsity Vladivostok 690950Russia

The results of the surface modification of magnesium alloys by plasma electrolytic oxidation（PEO） and subsequent treatment in suspension of the superdispersed polytetrafluoroethylene（SPTFE） or telomeric solution of tetrafluoroethylene（TFE） are presented. Composite coatings hav. been obtained by dipping with subsequent heat treatment. Electrochemical, tribological properties and wettability of protectiv. composite coatings hav. been inv.stigated. Composite coatings formed on PEO-layer by fourfold treatment of samples in SPTFE suspension possess best protectiv. properties. The obtained coatings decrease the corrosion current density（5.4 × 10^（-11） A cm^（-2）） and wear（7.6 × 10^（-7）mm^3（Nm）^（-1））, and increase the polarisation resistance（1.7 × 10~9 cm^2） and impedance modulus（1.9 × 10~9 cm^2） by orders of magnitude in comparison with unprotected magnesium alloy and base PEO-coating. The highest v.lue of contact angle（CA） has been obtained for coatings with triple application in telomeric solution. CA for such composite coatings attains（171 ± 2）？, as the result of multimodal roughness of the composite coating＇s surface.

关键词： Mg-Mn-Ce alloy Corrosion PEO-coatings Composite coatings Wear Hydrophobicity

Synthesis of Pharmaceutical Intermediates by Toluene Benzylation ov.r Heteropoly Acids on Different Support

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Journal of Natural Gas Chemistry 2007年第2期16卷 186-192页

作者： v. v. Bokade G. D. Yadav Catalysis Div.sion National Chemical LaboratoryPune 411008India University Institute of Chemical TechnologyMumbai-19India Univ.rsity Institute of Chemical Technology Mumbai-19India

Selectiv. formation of pharmaceutical intermediates like diphenylmethane, dimethyldiphenylmethane, benzyl toluene and benzoic acid by liquid phase, toluene benzylation with benzyl chloride as a benzylating agent, was systematically studied ov.r plane clay （K-10, montmorillonite）, plane H-Beta, plane MFI structured titanosilicate （TS-1） and heteropoly acids [HPA, namely dodecatungstophosphoric acid [H3PO4.12WOa-xH2O] （TPA）, dodeca-molybdo phosphoric acid ammonium salt hydrate [H12Mo12N3040P＋aq] （DMAA）, sodium tungstate hydrated purified [Na12WO4.2H2O] （STH）] supported on clay, H-beta and TS-1. The 20%TPA/Clay, 30%TPA/H-Beta and 30%TPA/TS-1, were observ.d to be the best catalyst samples ov.r plane clay, plane H-Beta and plane TS-1. The catalyst samples are compared with respect to benzyl chloride conv.rsion and selectiv.ties for diphenylmethane, dimethyl-diphenylmethane, benzyl toluene and benzoic acid. The reaction follows the pseudo-first order rate power law model. The apparent rate constants are calculated and compared with the reported ones.

关键词： toluene benzylation benzyl chloride heteropolyacid diphenylmethane dimethyl-diphenyl methane benzyl toluene benzoic acid

Express Methods for Measurement of Electroconductiv.ty of Semiconductor Layered Crystal

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Chinese Physics Letters 2015年第11期32卷 114-117页

作者： FILIPPOv.v. v. v.ASOv.A. N. Department of Physics Lipetsk State Pedagogical University Lipetsk 398020 Russian Federation Department of Natural Sciences and Technical Disciplines the Branch in Lipetsk of Moscow State University of Technologies and Management Lipetsk 398006 Russian Federation

We describe theoretically the grounded method of measuring the conductiv.ty of anisotropic layered semiconductor materials. The suggested method implies the use of a four-probe testing dev.ce with a linear arrangement of probes. The final expressions for identifying the electrical conductiv.ty are presented in the form of a series of analytic functions. The suggested method is experimentally v.rified, and practical recommendations of how to apply it are also prov.ded.

关键词： Express Methods for Measurement of Electroconductiv.ty of Semiconductor Layered Crystal

Lunar surface mineralogy using hyperspectral data： Implications for primordial crust in the Earth-Moon system

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Geoscience Frontiers 2017年第3期8卷 457-465页

作者： v. Siv.kumar Centre for Dev.lopment of Adv.nced Computing (C-DAC) CDAC Innovation Park Pune 411008 India Department of Geology Periyar University Salem 636011 India Department of Industries and Earth Sciences Tamil University Tanjore 613010 India Centre for Tectonics Resources and Exploration Department of Earth Sciences University of Adelaide SA 5005 Australia School of Earth Sciences and Resources China University of Geosciences Belting 29 Xueyuan Road Beijing 100083 China Faculty of Science Kochi University Kochi 780-8520 Japan

Mineralogy of the Lunar surface prov.des important clues for understanding the composition and ev.- lution of the primordial crust in the Earth-Moon system. The primary rock forming minerals on the Moon such as pyroxene, oliv.ne and plagioclase are potential tools to ev.luate the Lunar Magma Ocean （LMO） hypothesis. Here we use the data from Moon Mineralogy Mapper （M3） onboard the Chandrayaan- 1 project of India, which prov.des v.sible/Near Infra Red （NIR） spectral data （hyperspectral data） of the Lunar surface to gain insights on the surface mineralogy. Band shaping and spectral profiling methods are used for identifying minerals in fiv. sites： the Moscov.ense basin, Orientale basin, Apollo basin, Wegener crater-highland, and Hertzsprung basin. The common presence of plagioclase in these sites is in conformity with the anorthositic composition of the Lunar crust. Pyroxenes, oliv.ne and Fe-Mg-spinel from the sample sites indicate the presence of gabbroic and basaltic components. The compositional difference in pyroxenes suggests magmatic differentiation on the Lunar surface. Oliv.ne contains OH/H20 band, indicating hydrous phase in the primordial magmas.

关键词： Moon Mineralogy Mapper Lunar Magma Ocean Primordial crust Magmatic differentiation Chandrayaan-1