检索结果-南通市图书馆

Acta Mathematica sinica,English series 2008年第11期24卷 1775-1800页

作者： v.KOKILAsHvILI s.sAMKO A. Razmadze Mathematical Institute International Black Sea University Georgia University of Algarve Portugal

We prove the boundedness of the maximal operator Mr in the spaces L^p（·）（Г,p） with variable exponent p（t） and power weight p on an arbitrary Carleson curve under the assumption that p（t） satisfies the log-condition on Г. We prove also weighted sobolev type L^p（·）（Г, p） → L^q（·）（Г, p）-theorem for potential operators on Carleson curves.

关键词： weighted generalized Lebesgue spaces variable exponent singular operator fractional integrals sobolev theorem

Recrystallization Behavior Design for Controlling Grain size in strip Rolling Process

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and steel Research International 2008年第1期15卷 39-44页

作者： ZHU Guo-hui s v subramanian school of Materials science and Engineering Anhui University of Technology Ma＇anshan 243002 Anhui China Department of Materials science and Engineering McMaster University Hamilton LSS 4A7 Ontario Canada

To promote effectively dynamic recrystallization and obtain a homogeneous distribution of ultrafine grain size in strip finish rolling process,the behavior of static and dynamic recrystallization must be appropriately designed to provide an ultrafine austenite microstructure without mixed grain *** design of rolling schedule was analyzed based on the control of the recrystallization behavior to achieve ultrafine grain size in the strip rolling process of niobium microalloyed *** experimental simulations were presented to validate the twice dynamic recrystallization design to achieve ultrafine grain size control.

关键词： twice dynamic recrystallization critical strain dynamic recrystallization ultrafine grain size

Molecular dynamics modeling framework for overcoming nanoshape retention limits of imprint lithography

在线全文

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2018年第1期4卷 370-379页

作者： Anshuman Cherala s.v.sreenivasan NAsCENT Center MERB 1.206EPickle Research CampusUniversity of Texas10100 Burnet RoadAustinTX 78758USA

Complex nanoshaped structures(nanoshape structures here are defined as shapes enabled by sharp corners with radius of curvature<5 nm)have been shown to enable emerging nanoscale applications in energy,electronics,opti... 详细信息

Complex nanoshaped structures(nanoshape structures here are defined as shapes enabled by sharp corners with radius of curvatureve been shown to enable emerging nanoscale applications in energy,electronics,optics,and *** nanoshaped fabrication at high throughput is well beyond the capabilities of advanced optical *** the highest-resolution e-beam processes(Gaussian beam tools with non-chemically amplified resists)can achievesolution,this is only available at very low ***-area e-beam processes,needed for photomasks and imprint templates,are limited to~18 nm half-pitch lines and spaces and~20 nm half-pitch hole *** nanoimprint lithography,we have previously demonstrated the ability to fabricate precise diamond-like nanoshapes with~3 nm radius corners over large *** exemplary shaped silicon nanowire ultracapacitor device was fabricated with these nanoshaped structures,wherein the half-pitch was 100 *** device significantly exceeded standard nanowire capacitor performance(by 90%)due to relative increase in surface area per unit projected area,enabled by the *** beyond the previous work,in this paper we explore the scaling of these nanoshaped structures to 10 nm half-pitch and *** these scales a new“shape retention”resolution limit is observed due to polymer relaxation in imprint resists,which cannot be predicted with a linear elastic continuum *** all-atom molecular dynamics model of the nanoshape structure was developed here to study this shape retention phenomenon and accurately predict the polymer *** atomistic framework is an essential modeling and design tool to extend the capability of imprint lithography to sub-10 nm *** framework has been used here to propose process refinements that maximize shape retention,and design template assist features(design for nanoshape retention)to achieve targeted nanoshapes.

关键词： shape shaped corners

Empirical formulas for proton decay half-lives:Role of nuclear deformation and Q-value

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

Chinese Physics C 2018年第10期42卷 95-102页

作者： v.Dehghani s.A.Alavi Department of Physics University of Sistan and Baluchestan

Two empirical formulas for the proton decay half-lives including nuclear deformation are proposed. The formula with parameter set I gives the logarithm of the proton decay half-lives as an explicit function of the orbital angular momentum with eight adjustable parameters, whereas that with set II represents the logarithm of the reduced half-lives as an implicit function of the angular momentum with seven adjustable parameters. Experimental data for the half-lives of 44 proton emitters in the ground state or isomeric state were used to obtain the parameters. The experimental and calculated Q values were used. Different sets of parameters were obtained for the ground state transition, isomeric state transition, and all transitions for both deformed and spherical nuclei. The best agreement with experimental data was observed for set I for deformed proton emitters with exr）erimental Q values.

关键词： proton emission deformation empirical formula

Alpha-induced reaction cross-section for sm, U, Np targets： influence of hexadecapole deformation and deformed surface diffuseness

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2017年第6期41卷 85-92页

作者： s.A.Alavi v.Dehghani Department of Physics University of Sistan and Baluchestan Zahedan 98135-674 Iran

Alpha-induced reactions on 154^sm,233,235,236,238^U, and 237^Np deformed nuclei are studied *** effects of hexadecapole deformation, deformed surface diffuseness parameter, and orientation on barrier height and position, fusion cross-section at any angle, and fusion cross-section have been investigated. Both hexadecapole deformation and deformed surface diffuseness can affect barrier characteristics and enhance fusion cross-section. Good agreement between experimental data and theoretical calculations with quadrupole and hexadecapole deformation and deformed surface diffuseness were observed for the 4^He＋^154^sm,235^U,237^Np reactions.

关键词： nuclear potential fusion cross section deformation alpha induced reaction.

Color Image segmentation Using Feedforward Neural Networks with FCM

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2016年第5期13卷 491-500页

作者： s.Arumugadevi v.seenivasagam Department of Information Technology Sri Krishna Engineering College Department of Computer science & Engineering National Engineering College (Autonomous)

This paper proposes a hybrid technique for color image segmentation. First an input image is converted to the image of CIE L＊a＊b＊ color space. The color features ＂a＂ and ＂b＂ of CIE L^＊a^＊b^＊ are then fed into fuzzy C-means （FCM） clustering which is an unsupervised method. The labels obtained from the clustering method FCM are used as a target of the supervised feed forward neural network. The network is trained by the Levenberg-Marquardt back-propagation algorithm, and evaluates its performance using mean square error and regression analysis. The main issues of clustering methods are determining the number of clusters and cluster validity measures. This paper presents a method namely co-occurrence matrix based algorithm for finding the number of clusters and silhouette index values that are used for cluster validation. The proposed method is tested on various color images obtained from the Berkeley database. The segmentation results from the proposed method are validated and the classification accuracy is evaluated by the parameters sensitivity, specificity, and accuracy.

关键词： Color image segmentation neural networks fuzzy C-means (FCM) soft computing clustering

structural, vibrational, optical, photoluminescence, thermal,dielectric, and mechanical studies on zinc(tris) thiourea sulfate single crystal: A noticeable effect of organic dye

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第5期27卷 304-312页

作者： Mohd shkir v Ganesh s AlFaify I s Yahia Mohd Anis Advanced Functional Materials & Optoelectronic Laboratory Department of PhysicsFaculty of ScienceKing Khalid University Department of Physics Sant Gadge Baba Amravati University

In this work, uranine-dyed zinc（tris） thiourea sulfate（ZTs） monocrystals, 26 mm×15 mm×10 mm in size, were synthesized by the solution method at ambient temperature. Their purity, crystallinity, lattice parameters, and functional modes were studied by x-ray diffraction, Fourier transform-infrared spectroscopy（FT-IR）, and FT-Raman spectroscopy analyses. The sodium ion content of the crystals from the dye was confirmed by elemental analysis. The diffused reflectance spectral analysis of the dyed crystal revealed a characteristic absorption band at 490 nm attributed to the presence of the dye. The calculated band gaps of the non-dyed and dyed crystals were 4.53 and 4.57 e v, respectively. A green emission peak at ～（512 ± 4） nm was observed in the photoluminescence spectrum of the uranine-dyed crystals. A differential scanning calorimetry study confirmed that the thermal stability improved owing to the addition of the dye. Dielectric and microhardness studies were conducted to examine the significant improvements in the corresponding properties of dyed crystals. The results demonstrated the competency of the dyed ZTs crystals for applications in optoelectronic devices.

关键词： crystal growth dielectric properties luminescence thermal properties mechanical properties

Design, synthesis and Evaluation of substituted N-（3-Arylpropyl）-9,10-dihydro-9-oxoacridine-4-carboxamides as Potent MDR Reversal Agents in Cancer

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2011年第3期29卷 504-510页

作者： velingkar, v. s. Dandekar, v. D. Department of Pharmaceutical Chemistry Prin. K. M. Kundnani College of Pharmacy Cuffe Parade Mumbai 4000005 India

A novel class of molecules with structure N-（3-arylpropyl）-9,10-dihydro-9-oxoacridine-4-carboxamides （20- 29） were designed by generating a pharmacophore for potent MDR reversal activity using phase drug design software. The designed molecules were synthesized by a novel synthesis route and evaluated for their inhibitory effects on the transport activity of P-glycoprotein （P-gp） by standard Hoechst 33342 assay method. Based on the pIC50 values of ten title compounds screened, three compounds exhibited better activity as compared to verapamil used as standard.

关键词： N-(3-arylpropyl)-9,10-dihydro-9-oxo-acridine-4-carboxamides MDR reversal agents pharmacophore,phase drug design software structure-activity relationships structure elucidation

Cross-sections of photonuclear reactions ^(65)Cu(γ, n)^(64)Cu and ^(63)Cu(γ, xn)^(63−x)Cu in the energy range E_(γmax) = 35–94 Mev

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

Chinese Physics C 2022年第12期46卷 208-216页

作者： O.s.Deiev I.s.Timchenko s.M.Olejnik s.M.Potin v.A.Kushnir v.v.Mytrochenko s.A.Perezhogin B.I.shramenko National science Center“Kharkov Institute of Physics and Technology” 1Akademichna St.61108KharkivUkraine

The flux-averaged cross-sectionsfor the reactions^(65)Cu(γ,n)^(64)Cu,^(63)Cu(γ,n)^(62)Cu,^(63)Cu(γ,2n)^(61)Cu,and^(63)Cu(γ,3n)^(60)Cu have been measured within the bremsstrahlung end-point energy E_(γmax)range of 35–94 *** experiments were performed with the electron beam from the NsC KIPT linear accelerator LUE-40 with the use of the activation and off-lineγ-ray spectrometric *** calculation of the flux-average cross-sections_(th)was conducted using the cross-sectionσ(E)values from the TALYs1.95 code,run with default *** is shown that the experimental average cross-sections for the reactions^(65)Cu(γ,n)^(64)Cu,^(63)Cu(γ,n)^(62)Cu,and^(63)Cu(γ,2n)^(61)Cu are systematically higher than the theoretical estimates based on the TALYs1.95 *** obtainedvalues supplement the data of different laboratories for the(γ,n)and(γ,2n)reactions of^(63)Cu and^(65)*** the reaction^(63)Cu(γ,3n)^(60)Cu,the values ofwere measured for the first time.

关键词： ^(63)Cu ^(65)Cu photonuclear reactions flux-averaged cross-section bremsstrahlung end-point energies of 35-94 Mev activation and off-lineγ-ray spectrometric techniques TALYs1.95 GEANT4

Grain to outcrop-scale frozen moments of dynamic magma mixing in the syenite magma chamber,Yelagiri Alkaline Complex,south India

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2014年第6期5卷 801-820页

作者： M.L.Renjith s.N.Charan D.v.subbarao E.v.s.s.K.Babu v.B.Rajashekhar Marine and Coastal survey Division Geological Survey of IndiaCochin 682037India Geochemistry Division CSIR-National Geophysical Research InstituteHyderabad 500007India New Zealand Petroleum and Minerals Wellington 6037New Zealand

Magma mixing process is unusual in the petrogenesis of felsic rocks associated with alkaline complex worldwide. Here we present a rare example of magma mixing in syenite from the Yelagiri Alkaline Complex, south India. Yelagiri syenite is a reversely zoned massif with shoshonitic (Na2O t K2O?5e 10 wt.%, Na2O/K2O ? 0.5e2, TiO2s character. systematic modal variation of plagioclase (An11e16 Ab82e88), K-feldspar (Or27e95 Ab5e61), diopside (En34e40Fs11e18Wo46e49), biotite, and Ca-amphibole (edenite) build up three syenite facies within it and imply the role of in-situ fractional crystallization (FC). Evidences such as (1) disequilibrium micro-textures in feldspars, (2) microgranular mafic enclaves (MME) and (3) synplutonic dykes signify mixing of shoshonitic mafic magma (MgO ? 4e 5 wt.%, siO2 ? 54e59 wt.%, K2O/Na2O ? 0.4e0.9) with syenite. Molecular-scale mixing of mafic magma resulted disequilibrium growth of feldspars in syenite. Physical entity of mafic magma preserved as MME due to high thermal-rheological contrast with syenite magma show various hybridization through chemical exchange, mechanical dilution enhanced by chaotic advection and phenocryst migration. In synplutonic dykes, disaggregation and mixing of mafic magma was confined within the conduit of injec-tion. Major-oxides mass balance test quantified that approximately 0.6 portions of mafic magma had interacted with most evolved syenite magma and generated most hybridized MME and dyke samples. It is unique that all the rock types (syenite, MME and synplutonic dykes) share similar shoshonitic and met-aluminous character;mineral chemistry, REE content, coherent geochemical variation in Harker diagram suggest that mixing of magma between similar composition. Outcrop-scale features of crystal accumu-lation and flow fabrics also significant along with MME and synplutonic dykes in syenite suggesting that Yelagiri syenite magma chamber had evolved through multiple physical processes like

关键词： Magma mixing Disequilibrium textures Petrology synplutonic dykes Geodynamics