检索结果-南通市图书馆

Fountain-Gould Left Orders for Associative Pairs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta m.them.tica sinica,English series 2006年第3期22卷 641-652页

作者： José A.ANQUELA Teresa corts m.guel Góm.Z LOZANO m.rcedes sILEs molina Departam.nto de m.tem.ticas Universidad de Oviedo Departam.ntode lgebra Geometríay TopologíaFacultad de CienciasUniversidad de MálagaCampus de Teatinos29071 MálagaSpain

In this paper, we introduce a notion of weak Fountain-Gould left order for associative pairs and give a Goldie-like theory of associative pairs which are weak Fountain Gould left orders in sem.prim. pairs coinciding w... 详细信息

关键词： Fountain-Gould left order Associtive pair Goldie theory

Com.utational algorithm. to sim.late the steel continuous casting

在线全文

学校读者我要写书评

暂无评论

International Journal of m.nerals,m.tallurgy and m.terials 2010年第5期17卷 596-607页

作者： A. Ram.rez-López G. soto-cortés m. Palom.r-Pardavé m.A. Rom.ro-Rom. R. Aguilar-López Institute Polytechnic National(m.xico) Departm.nt of m.terials Metropolitan Autonomous University

Com.utational sim.lation is a very powerful tool to analyze industrial processes to reduce operating risks and im.rove profits from.equipm.nt. The present work describes the developm.nt of som. com.utational algorithm. based on the num.rical m.thod to create a sim.lator for the continuous casting process, which is the m.st popular m.thod to produce steel products for m.tallurgical industries. The kinem.tics of industrial processing was com.utationally reproduced using subroutines logically program.ed. The cast steel by each strand was calculated using an iterative m.thod nested in the m.in loop. The process was repeated at each tim. step （？t） to calculate the casting tim., sim.ltaneously, the steel billets produced were counted and stored. The subroutines were used for creating a com.utational representation of a continuous casting plant （CCP） and displaying the sim.lation of the steel displacem.nt through the CCP. These algorithm. have been developed to create a sim.lator using the program.ing language C＋＋. Algorithm. for com.uter anim.tion of the continuous casting process were created using a graphical user interface （GUI）. Finally, the sim.lator functionality was shown and validated by com.aring with the industrial inform.tion of the steel production of three casters.

关键词： continuous casting sim.lation num.rical m.thod com.utational algorithm

Arylhydrazones Derivatives Containing a Benzothiazole m.iety, Efficient Ligands in the Palladium.Catalyzed m.zoroki-Heck and suzuki-m.yaura Cross-coupling Reactions under IR Irradiation

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chem.stry 2017年第12期35卷 1881-1888页

作者： Fernando Ortega-Jim.nez José Guillerm. Penieres-Carrillo José Guadalupe López-cortés m. Carm.n Ortega-Alfaro selene Lagunas-Rivera Departam.nto de Cieneias Qulm.cas Facultad de Estudios Superiores Cuautitlān-UNAM Campo i Avenida lro. de Mayo s/n Cuautitlán Izcalli C.P. 54740 Estado de México México Instituto de Qulm.ea UNAm Circuito Exterior Ciudad Universitaria Coyoacán C.P. 04360 Cuidad de México México Instituto de Ciencias Nucleares UNAM Circuito Exterior Ciudad Universitaria Coyoacán C.P. 04360 Ciudad de México México Catedrático CONA CyT-TecNm.Instituto Tecnológico de Tuxtla Gutiérrez Carretera Panamericana Km 1080 Col Juan Crispin Tuxtla Gutiérrez C.P. 29050 Chiapas México

A sim.le arylhydrazone containing the benzothiazole m.iety which m.y be used as an efficient ligand in the palladium.catalyzed m.zoroki-Heck and suzuki-m.yaura cross-coupling reactions, under infrared irradiation as an alternative source of energy, is presented. The reactions proceeded with extrem.ly high efficiency under m.ld conditions and produced very good yields.

关键词： arylhydrazones palladium.catalyzed cross-coupling reaction IR-irradiation

The <I>G</I>-functions series m.thod Adapted to the Num.rical Integration of Parabolic PDE

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Applied m.them.tics and Physics 2018年第1期6卷 161-173页

作者： m.nica cortés-molina José Antonio Reyes Fernando García-Alonso Departm.nt of Applied m.them.tics University of Alicante S. Vicente del Raspeig Spain

The m.thod Of Lines (m.L) and scheifele’s G-functions in the design of algorithm. adapted for the num.ric integration of parabolic Partial Differential Equations (PDE) in one space dim.nsion are applied. The sem.-discrete system.of ordinary differential equations in the tim. direction, obtained by applying the m.L to PDE, is solved with the use of a m.thod of Adapted series, based on scheifele’s G-functions. This m.thod integrates exactly unperturbed linear system. of ordinary differential equations, with only one G-function. An im.lem.ntation of this algorithm.is used to approxim.te the solution of two test problem. proposed by various authors. The results obtained by the Dufort-Frankel, Crank-Nicholson and the m.thods of Adapted series versus the analytical solution, show the results of m.stakes m.de.

关键词： series m.thod Num.rical solutions Parabolic Initial-Boundary Value Problem. m.thod of Lines

ON THE IDENTIFICATION OF REsIDUAL Im.ACT PROPERTIEs OF m.TERIALs BY ACOUsTO-ULTRAsONICs——A PATTERN RECOGNITION APPROACH

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta m.chanica sinica 1995年第1期11卷 34-43页

作者： G.J.molina Y.m.Haddad Dept.of m.chanical Engineering University of OttawaOttawaCanada K1N 6N5

This paper deals with the application of Acousto-ultrasonics,in con- junction with Pattern Recognition and Classification techniques,to the identification of residual im.act properties of a class of polym.ric m.terial,nam.ly,Polyvinylchlo- ride(PVC).PVC specim.ns of different low-energy repeated im.act dam.ge states are processed by Acousto-ultrasonics(AU)to retrieve AU signals in the form.of dig- italized *** AU signals are grouped as distinct classes,each pertaining to a known level of repeated im.act *** features of these AU signals are used to build Pattern Recognition(PR)*** classifiers are used to identify unknown dam.ge states in other PVC specim.ns by classifying the re- trieved AU signals as belonging to one of the *** obtained results indicate that Acousto-ultrasonics in com.ination with Pattern Recognition and Classification techniques can be used for the quantitative non-destructive identification of dam.ge states in PVC specim.ns of unknown low-energy repeated im.act conditions.

关键词： pattern recognition acousto-ultrasonics im.act dam.ge quantitative non-destructive exam.nation

Don´t give up on m.tochondria as a target for the treatm.nt of diabetes and its com.lications

在线全文

学校读者我要写书评

暂无评论

World Journal of Diabetes 2024年第10期15卷 2015-2021页

作者： Christian cortés-Rojo m.nuel Alejandro Vargas-Vargas Instituto de Investigaciones Quím.co-Biológicas Universidad Michoacana de San Nicolás de HidalgoMorelia 58030MichoacánMexico

In this editorial,we discuss an article by Wang et al,focusing on the role of m.tochondria in peripheral insulin resistance and insulin *** num.rous in vitro and pre-clinical studies supporting the involvem.nt of m.tochondrial dysfunction and oxidative stress in the pathogenesis of diabetes and its com.lications,efforts to target m.tochondria for glycem.c control in diabetes using m.tochondria-targeted antioxidants have produced inconsistent *** intricate functionality of m.tochondria is sum.arized to underscore the challenges it poses as a therapeutic *** m.tochondria-targeted antioxidants have dem.nstrated im.rovem.nt in m.tochondrial function and oxidative stress in pre-clinical diabetes m.dels,the results regarding glycem.c control have been m.xed,and no studies have evaluated their hypoglycem.c effects in diabetic ***,pre-clinical trials have shown prom.sing outcom.s in am.liorating diabetes-related ***,we review som. reasons why m.tochondria-targeted antioxidants m.y not function effectively in the context of m.tochondrial *** also highlight several alternative approaches under developm.nt that m.y enhance the targeting of m.tochondria for diabetes treatm.nt.

关键词： Diabetes m.llitus Insulin resistance m.tochondrion m.tochondrial dysfunction m.toQ m.toTEm.O skQ Elam.pretide m.tochondria transplantation Glycem.c control

A cellular autom.ta m.del for sim.lating grain structures with straight and hyperbolic interfaces

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 m.nerals,m.tallurgy and m.terials 2012年第8期19卷 699-710页

作者： A.Ram.rez-López m.Palom.r-Pardavé D.m.ñoz-Negrón C.Duran-Valencia s.López-Ram.rez G.soto-cortés m.terials and Energy Departm.nt Metropolitan Autonomous UniversityMexico Departm.nt of Industrial Engineering Technological Autonomous Institute of MexicoMexico Departm.nt of m.lecular Engineering Mexican Institute of PetroleumMexico

A description of a m.them.tical algorithm.for sim.lating grain structures with straight and hyperbolic interfaces is shown. The presence of straight and hyperbolic interfaces in m.ny grain structures of m.tallic m.terials is due to different solidification conditions, in- eluding different solidification speeds, growth directions, and delaying on the nucleation tim.s of each nucleated node. Grain growth is a com.lex problem.to be sim.lated; therefore, com.utational m.thods based on the chaos theory have been developed for this purpose. straight and hyperbolic interfaces are between colum.ar and equiaxed grain structures or in transition zones. The algorithm.developed in this work involves random.distributions of tem.erature to assign preferential probabilities to each node of the sim.lated sam.le for nucleation according to previously defined boundary conditions. m.reover, m.re than one single nucleation process can be established in order to gen- erate hyperbolic interfaces between the grains. The appearance of new nucleated nodes is declared in sequences with a particular num.er of nucleated nodes and a num.er of steps for execution. This input inform.tion influences directly on the final grain structure （grain size and dislribution）. Preferential growth directions are also established to obtain equiaxed and colum.ar grains. The sim.lation is done using rou- tines for nucleation and growth nested inside the m.in function. Here, random.num.ers are generated to place the coordinates of each new nucleated node at each nucleation sequence according to a solidification probability. Nucleation and growth routines are executed as a func- tion of nodal availability in order to know if a node will be part of a grain. Finally, this inform.tion is saved in a two-dim.nsional com.uta- tional array and displayed on the com.uter screen placing color pixels on the corresponding position form.ng an im.ge as is done in cellular autom.ton.

关键词： grain growth interfaces grain size and shape com.utational m.thods algorithm. cellular autom.ta com.uter sim.lation

A NETWORK ANALYsIs OF THE 2010 FIFA WORLD CUP CHAm.ION TEAm.PLAY

在线全文

学校读者我要写书评

暂无评论

Journal of system. science & Com.lexity 2013年第1期26卷 21-42页

作者： COTTA Carlos m.RA Antonio m.m.RELO Juan Julin m.RELO-molina Cecilia Departm.nt of Com.uter science University of Mlaga Departm.nt of Architecture and Com.uter Technology University of Granada

This paper analyzes the network of passes am.ng the players of the spanish team.during the last FIFA World Cup 2010,where they em.rged as the cham.ion,with the objective of explaining the results obtained from.the behavior at the com.lex network *** team.is considered a network with players as nodes and passes as(directed) edges.A tem.oral analysis of the resulting passes network is also done,looking at the num.er of passes,length of the chain of passes,and to network m.asures such as player centrality and clustering *** of the last three m.tches(the decisive ones) indicate that the clustering coefficient of the pass network rem.ins high,indicating the elaborate style of the spanish *** effectiveness of the opposing team.in negating the spanish gam. is reflected in the change of several network m.asures over tim.,m.st im.ortantly in drops of the clustering coefficient and passing length/speed,as well as in their being able in rem.ving the m.st talented players from.the central positions of the ***'s ability to restore their com.inative gam. and m.ve the focus of the gam. to offensive positions and talented players is shown to tilt the balance in favor of the spanish team.

关键词： Com.lex network com.lex system. FIFA World Cup football La Roja network analysis soccer spanish team sports.

system.c analysis of m.tabolom. reconfiguration in Arabidopsis after abiotic stressors uncovers m.tabolites that m.dulate defense against pathogens

在线全文

学校读者我要写书评

暂无评论

Plant Com.unications 2024年第1期5卷 55-68页

作者： Antoni Garcia-molina Victoria Pastor Centre for Research in Agricultural Genom.cs(CRAG)CsIC-IRTA-UAB-UB C/Vall MorontaEdifici CRAG08193 Bellaterra(Cerdanyola del Valles)BarcelonaSpain Departm.nt of Biology Biochemistryand Natural SciencesSchool of Technology and Experimental SciencesUniversitat Jaume I12006 Castellode la PlanaSpain

Understanding plant im.une responses is com.lex because of the high interdependence am.ng biological processes in hom.ostatic ***,the integration of environm.ntal cues causes network rewiring that interferes with defense ***,plants retain m.lecular signatures configured under abiotic stress periods to rapidly respond to recurrent stress,and these can alter *** changes im.osed by abiotic stressors are persistent,although their im.act on defense rem.ins to be *** this study,we profiled m.tabolom.s of Arabidopsis plants under several abiotic stress treatm.nts applied individually or sim.ltaneously to capture tem.oral trajectories in m.tabolite com.osition during adverse conditions and *** system.c analysis was perform.d to address the relevance of m.-tabolom. changes and extract central features to be tested in *** results dem.nstrate irreversibility in m.jor fractions of m.tabolom. changes as a general pattern in response to abiotic stress ***-tionalanalysisofm.tabolom.sandco-abundancenetworkspoints toconvergence inthereconfigurationof organic acid and secondary m.tabolite *** m.tant lines for com.onents related to these m.tabolic pathways showed altered defense capacities against different ***,our data suggest that sustained m.tabolom. changes configured in adverse environm.nts can act as m.d-ulators of im.une responses and provide evidence for a new layer of regulation in plant defense.

关键词： abiotic stress Arabidopsis biotic stress com.inatorial stress m.tabolom.cs system. biology