检索结果-南通市图书馆

Acta Mathematica Scientia 2015年第6期35卷 1437-1453页

作者： Ram u.VERMA Department of Mathematics Texas State University

First, a class of higher order exponential type hybrid （α,β, γ, η, p, h（.,.）, κ（., .）, w（.,., .）, ω（.,.,.）, θ）-invexities is introduced, second, some parametrically sufficient efficiency conditions based on the higher order exponential type hybrid invexities are established, and finally some parametrically sufficient efficiency results under the higher order exponential type hybrid （a,β, γ, ρ, h（.,.）, k（.,-）, w（-,., .）, w（.,., .）, 0）-invexities are investigated to the context of solving semiinfinite multiobjective fractional programming problems. the notions of the higher order exponential type hybrid （a, β, γ η, p, h（., .）, n（., .）, w（-,.,-）, ω（.,.,.）, 0）-invexities encompass most of the generalized invexities in the literature. to the best of our knowledge, the results on semiinfinite multiobjective fractional programming problems established in this communication are new and application-oriented toward multitime multi- objectve problems as well as multiobiective control problems.

关键词： semiinfinite fractional programming multiobjective fractional programming,Hanson-Antczak-type generalized HAα,β,γ,η,ρh-V-invex functions hy-(α,β,γ,η,ρh(.,.),k(.,.),w(.,.,.)w(.,.,.),θ-invexity)

Compound Rejuvenation of Polymer Modified Asphalt Binder

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan university of technology(Materials Science) 2010年第6期25卷 1070-1076页

作者：马涛 HuSSAIN u Bahia School of transportation Southeast University Department of Civil and Environmental Engineering University of Wisconsin-Madison2205 Engineering Hall

the objective of this research was to show a way to conduct rejuvenation of aged polymer modified asphalt binder（PMB） *** fully evaluate and understand the rejuvenation of aged PMB,the Penetration grade tests including penetration,soften point,ductility and elastic recovery and SuperpavetM PG grade tests including DSR,BBR and DDt were *** rejuvenation effect of aged PMB by utilizing a fluid recycling agent in common use for binder rejuvenation was *** then the compound rejuvenation effect of aged PMB by utilizing the recycling agent with a new modifying additive for binder modification was *** experimental results indicated that the recycling agent in common use currently does not apply to polymer modified asphalt binder *** the recycling agent together with the modifying additive can restore the characteristics of aged polymer modified binder very ***,compound rejuvenation of polymer modified asphalt binder is recommended.

关键词： polymer modified asphalt binder penetration grade test superpavetM PG grade test recycling agent modifying additive compound rejuvenation

Celiac disease:diagnostic criteria in progress

在线全文

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2011年第2期8卷 96-102页

作者： u Volta V Villanacci Department of Clinical Medicine St Orsola-Malpighi University HospitalBolognaItaly Department of Pathology Spedali CiviliBresciaItaly

until a few years ago,celiac disease(CD)was thought to be a rare food intolerance that was confined to childhood and characterized by severe malabsorption and flat intestinal ***,CD is regarded as an autoimmune disorder that is common in the general population(affecting 1 in 100 individuals),with possible onset at any age and with many possible *** identification of CD is challenging because it can begin not only with diarrhea and weight loss but also with atypical gastrointestinal(constipation and recurrent abdominal pain)and extra-intestinal symptoms(anemia,raised transaminases,osteoporosis,recurrent miscarriages,aphthous stomatitis and associated autoimmune disorders),or it could be completely *** the last 20 years,the diagnostic accuracy of serology for CD has progressively increased with the development of highly reliable tests,such as the detection of IgA tissue transglutaminase and antiendomysial and IgG antideamidated gliadin peptide *** routine use of antibody markers has allowed researchers to discover a very high number of‘borderline’cases,characterized by positive serology and mild intestinal lesions or normal small intestine architecture,which can be classified as potential ***,it is evident that the‘old celiac disease’with flat mucosa is only a part of the spect.um of *** is possible that serology could identify CD in its early stages,before the appearance of severe intestinal *** cases with a positive serology but with mild or absent intestinal lesions,the detection of HLA-DQ2 and HLA-DQ8 can help reinforce or exclude the diagnosis of gluten sensitivity.

关键词： celiac disease clinical presentation diagnostic criteria histology,genetics serology

An efficient built.up land expansion model using a modified u-Net

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Digital Earth 2022年第1期15卷 148-163页

作者： Hanieh Shojaei Saeed Nadi Hossein Shafizadeh-Moghadam Amin tayyebi John van Genderen Department of Geomatics Engineering University of IsfahanIsfahanIran Department of Civil and Environmental Engineering Carleton UniversityOttawaCanada Department of Water Resources Engineering and Management Tarbiat Modares UniversityTehranIran Data Science Manager Exelon UtilityChicagoILUSA Department of Earth Observation Sciences (ItC) University of TwenteEnschedeThe Netherlands

this paper introduces an improved convolutional neural network based on the conventional u-Net for simulating built.up land *** proposed method hires a pixel-wise semantic segmentation approach considering the spatial drivers affecting urbanization as data *** variables including altitude,slope,and distance from barren,crop,greenery,roads,and urban areas for 1998,2008,and 2018 were considered as covariates for the simulation of built.up land expansion in tehran and Karaj regions in *** proposed method was compared with the random forest(RF)algorithm as the baseline *** using the area under the total operating characteristic indicated the superiority of our modified u-Net(0.87)over the RF(0.82)***,evaluation using the percent correct metric indicated that our proposed model is capable of learning neighborhood effects effectively leading to simulate built.up land expansion accurately,independent from applying a cellular automata(CA)***,the modified u-Net independent from the CA which can consider the neighborhood effects is recommended for the simulation of built.up land expansion precisely.

关键词： Land use and land cover change built.up land expansion convolutional neural networks pixel-wise semantic segmentation u-Net total operating characteristic(tOC)

Identification of expected seismic activity areas by forecasting complex seismic-mode parameters in uzbekistan

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geodesy and Geodynamics 2018年第2期9卷 121-130页

作者： t.u.Artikov R.S.Ibragimov t.L.Ibragimova M.A.Mirzaev Institute of Seismology

In this paper, the author proposed a methodology to reveal expected seismic activation places for coming years by a complex of forecasting parameters of a seismic mode. Areas in uzbekistan where currently observed anomalies in various parameters of a seismic mode has been revealed. By number of displayed abnormal signs the areas has been ranked based on probability of occurrence of strong earthquakes there. It has prepared schemes of the synoptic forecast of expected seismic activation places in case of occurrence of strong earthquakes in the Central-Asian region.

关键词： Long-term forecast of earthquakes Parameters of seismic mode Seismic activity Seismic gap

Study of modern seismic zoning maps'accuracy(case for Eastern uzbekistan)

在线全文

学校读者我要写书评

暂无评论

Geodesy and Geodynamics 2016年第6期7卷 416-424页

作者： t.u.Artikov R.S.Ibragimov t.L.Ibragimova M.A.Mirzaev Institute of Seismology Academy of Science of the Republic of UzbekistanTashkentUzbekistan

Influence of uncertainty factors of input parameters on results of the estimation of seismic hazard has been researched. It is found that the largest deviations, from seismic hazard maps designed on the basis of average values of distribution of seismic mode and seismic load parameters, may arise due to the imprecise depth of earthquake sources （H）, uncertain estimations of seismic potential and slope of recurrence curve （v）. the contribution of such uncertainty factors, like imprecise definition of seismic activity Alo, incorrect choice of prevailing type of a motion in the source, using regional laws of attenuation of seismic load intensity in distance instead of local once are substantially small. For Eastern uzbekistan, it was designed the seismic hazard map with the highest value which takes into account every possible factors of uncertainty in parameters of seismic mode and seismic load.

关键词： Seismic hazardSeismic potentialSeismic activitySeismic intensitySeismic zoningSeismic sources

Effect of Critical Beam Radius on Self-focusing of cosh-Gaussian Laser Beams in Collisionless Magnetized Plasma

在线全文

学校读者我要写书评

暂无评论

Communications in theoretical Physics 2018年第8期69卷 220-224页

作者： t.u.urunkar S.D.Patil A.t.Valkunde B.D.Vhanmore K.M.Gavade M.V.takale Department of Physics Shivaji University Department of Physics Devchand College

Effect of critical beam radius on self-focusing of cosh-Gaussian laser beams in collisionless magnetized plasma under ponderomotive nonlinearity forms the main core of present work. to investigate propagation dynamics of cosh-Gaussian laser beams in collisionless magnetized plasma, well established parabolic equation approach under WKB and paraxial approximations is employed. Our study is crucially pivoted on the concept of critical curve and subsequent determination of numerical interval for decentered parameter to sustain the competition between diffraction and self-focusing during the propagation of laser beam. Additionally, in the present study an interesting feature in the self-focusing region of the critical curve has been attempted for different values of decentered parameter.

关键词： self-focusing cosh-Gaussian magnetized plasma beam radius decentered parameter

Data quality issues for synchrophasor applications PartⅠ:a review

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2016年第3期4卷 342-352页

作者： can HuANG Fangxing LI Dao ZHOu Jiahui GuO Zhuohong PAN Yong LIu Yilu LIu Department of Electrical Engineering and Computer Science The University of TennesseeKnoxvilleTN 37996USA

Synchrophasor systems, providing low-latency,high-precision, and time-synchronized measurements to enhance power grid performances, are deployed ***, the synchrophasor system as a physical network,involves communication constraints and data quality issues, which will impact or even disable certain synchrophasor applications. this work investigates the data quality issue for synchrophasor applications. In Part I, the standards of synchrophasor systems and the classifications and data quality requirements of synchrophasor applications are reviewed. Also, the actual events of synchronization signal accuracy, synchrophasor data loss, and latency are counted and analyzed. the review and statistics are expected to provide an overall picture of data accuracy,loss, and latency issues for synchrophasor applications.

关键词： Synchrophasor system Synchrophasor application Data quality Data accuracy Data loss Latency

Const.ucting mild expanded graphite microspheres by pressurized oxidation combined microwave treatment for enhanced lithium storage

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2021年第4期40卷 837-847页

作者： can-Liang Ma Zhen-Hui Hu Ning-Jing Song Yun Zhao Yan-Zhen Liu Hui-Qi Wang Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province Institute of Molecular ScienceShanxi UniversityTaiyuan 030006China College of Chemistry and Chemical Engineering Jinzhong UniversityJinzhong 030619China CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China School of Energy and Power Engineering School of Material Science and EngineeringNorth University of ChinaTaiyuan 030051China

the modified graphite anode materials have some prominent advantages over other anode materials in the industrial applications.A novel simple and gentle method is proposed to synthesize the mild expanded graphite microspheres(MEGMs) from flake graphite spheres through a combined modified pressurized oxidation combined with the microwave *** microst.uctural results demonstrate that moderately expanded MEGMs with an expansion volume between 4 and 10 ml·g^(-1)exhibit a highly microporous st.ucture with an enlarged interlayer spacing,a decreased microcrystalline size,as well as an increased number of functional groups on the surface,resulting in the increased storage sites and spaces for lithium ions and the enhanced diffusion rate of lithium *** used as the anode material for lithium-ion batteries,the MEGM-t75t30 obtained by oxidation treatment at 75℃ for 30 min followed by microwave irradiation for expansion displays a high reversible capacity of 446.7 mAh·g^(-1) at 100 mA·g^(-1) after 100 cycles and excellent rate performance(330 and 116 mAh·g^(-1) at 800 and 3200 mA·g^(-1),respectively).therefore,the MEGMs prepared by this convenient and mild method show excellent electrochemical properties and good application potential.

关键词： Pressurized oxidation Microwave treatment Mild expanded graphite microspheres Microst.ucture Graphitic anode material Lithium-ion battery

Data quality issues for synchrophasor applications Part Ⅱ:problem formulation and potential solutions

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2016年第3期4卷 353-361页

作者： can HuANG Fangxing LI Lingwei ZHAN Yao Xu Qinran Hu Dao ZHOu Yilu LIu Department of Electrical Engineering and Computer Science The University of TennesseeKnoxvilleTN 37996USA

this work investigates the data quality issue for synchrophasor applications, and pays particular attention to synchronization signal loss and synchrophasor data loss events. First, the historical synchronization signal loss events are analyzed and the potential reasons and solutions are discussed. then, the scenario of a small amount of synchrophasor data loss is studied and a Lagrange interpolating polynomial method is used to adaptively estimate the incomplete and missing data. the performance of proposed method is demonstrated with simulation ***, the proposed method considers the trade-off between the estimation accuracy and the hardware cost,and could be efficiently employed in reality.

关键词： GPS loss Synchronization signal loss Synchrophasor data loss Estimation Forecasting