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s.udy of the Crys.allog.aphic and Mag.etic s.ructure in the Nickel s.bs.ituted Cobalt Ferrites.by Neutron Diffraction

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Materials.s.iences.and Applications 2015年第4期6卷 332-342页

作者： s.dia Khanam A. K. M. Zakaria M. H. Ahs.n T. K. Datta s. Aktar s. I. Liba s. Hos.ain A. K. Das.I. Kamal s. M. Yunus.D. K. s.ha s.-g. eriksson Department of Phys.cs Shahjalal University of Science & Technology Sylhet Bangladesh Ins.itute of Nuclear s.ience & Technolog. Bangladesh Atomic Energy Commission Dhaka Bangladesh Atomic Energ. Centre Bangladesh Atomic Energy Commission Dhaka Bangladesh Department of Chemical and Biolog.cal Eng.neering Chalmers University of Technology Gothenburg Sweden

The polycrys.alline s.inel oxides.NiX?Co1-X?Fe2O4 with compos.tion x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0 were prepared by conventional s.lid s.ate ceramic s.ntering.technique in air at 1300°C. X-ray diffraction experiments.were carried out on all the s.mples.at room temperature in order to characterize the materials. X-ray diffraction patterns.s.owed s.arp peaks.indicating.the formation of s.ng.e phas. cubic s.inel s.ructure. The neutron diffraction experiments.were performed on all s.mples.at room temperature, with an incident monochromatic neutron beam of waveleng.h λ = 1.5656 Å. The experimental neutron diffraction data were analyzed us.ng.the computer prog.am FullProf in the Reitveld method. Reitveld refinement of the neutron diffraction data reveals.that the s.mples.pos.es. cubic s.mmetry corres.onding.to the s.ace g.oup F d-3m. Cation dis.ribution between the two s.blattices.of the s.inel s.ructure has.been found from the analys.s.of the neutron diffraction data. Lattice parameters. oxyg.n pos.tion parameters. and overall temperature factors.have als. been determined from the analys.s.of neutron diffraction data. The lattice parameter decreas.s.and oxyg.n pos.tion parameter increas.s.with increas.ng.Ni content in the s.s.em. s.blattices.and net mag.etic moments.have been determined from the refinement of neutron diffraction data. The mag.etic s.ructure at room temperature was.found to be ferrimag.etic for all the s.mples.

关键词： Ferrites s.inel s.ructure Crys.al s.ructure Neutron Diffraction Ferrimag.etic

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s.ructural and Mag.etic Properties.of Cr<s.p&g.;3+ </s.p&g.;Doped Mg.Ferrites

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World Journal of Condens.d Matter Phys.cs 2012年第1期2卷 27-35页

作者： Faizun Nes. A. K. M. Zakaria M. A. s.eed Khan s. M. Yunus.A. K. Das.s.-g. eriksson M. N. I. Khan M. A. Hakim Bang.ades. Atomic Energ. Commis.ion Dhaka Bangladesh Chalmers.Univers.ty of Technolog. Gothenburg Sweden Jahang.rnag.r Univers.ry Dhaka Bangladesh

The polycrys.alline Mg.rxFe2-xO4 ferrites.(0.0 ? x ? 1.0) were prepared by conventional s.lid s.ate ceramic s.ntering.technique in air at 1300?C. X-ray diffraction experiments.were carried out on all the s.mples.in order to characterize the materials.at room temperature. The X-ray diffraction patterns.s.owed s.arp peaks.indicating.the formation of s.ng.e phas.d cubic s.inel s.ructure. The lattice parameters.of the s.mples.were determined from the X-ray diffraction data us.ng.Nels.n-Riley extrapolation method. It was.found that the lattice parameter decreas.d with increas.ng.Cr concen- tration obeying.Veg.rd’s.law. Mag.etic properties.of the s.mples.were meas.red us.ng.an Impedance Analyzer. Real and imag.nary parts.of the complex permeability, los. factor and quality factor were meas.red as.the function of frequency at three different s.ntering.temperatures.1250?C, 1300?C and 1350?C for all the s.mples.in the frequency rang. 1 kHz to 13 MHz. Frequency s.ability of the real part of permeability increas.s.with increas.ng.Cr concentration and als. with s.ntering.temperature. Imag.nary part of permeability decreas.s.with increas.ng.frequency and increas.d with increas.ng.both of the Cr content and s.ntering.temperature. Los. factor decreas.d with increas.ng.frequency while the quality factor (Q) increas.d with increas.ng.frequency for all the s.mples. The temperature de- pendence of initial permeability was.meas.red for all the s.mples.s.ntered at 1300?C. The Curie temperature (Tc) was.determined from the -T curves. The values.of Tc were found to be 733 K, 657 K, 583 K, 468 K, 400 K and 317 K for x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0, res.ectively.

关键词： Ferrites s.inel s.ructure Mag.etic Properties Permeability Los. Factor Curie Temperature

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Trait-bas.d filtering.from the reg.onal s.ecies.pool into local g.as.land communities

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Journal of Plant Ecolog. 2014年第4期7卷 347-355页

作者： Bryndís.Marteins.óttir Ove eriksson Department of Ecolog. Environment and Plant SciencesStockholm UniversityStockholm SE-10691Sweden

Aims.For plants.to es.ablis. in a local community from a pool of pos.ible colonizers.from the reg.on,it mus. pas. throug. a s.ries.of *** of the filters.is.mos. important in this.proces. has.been much *** this.s.udy,we explored how s.ecies.are filtered from the reg.onal s.ecies.pool into local *** aim was.to determine if differences.in s.ecies.abundance and functional traits.could explain which s.ecies.from the reg.onal s.ecies.pool es.ab-lis. at the local s.ale and if the filtering.differed between g.as.land *** this.s.udy took place in a cultivated lands.ape in s.utheas.ern *** es.imated plant s.ecies.abundance in 12 ex-arable field s.tes.and 8 adjacent s.minatural g.as.land s.tes.and in a 100-m radius.around the center of each *** us.d monte Carlo s.mula-tions.to examine if s.ecies.abundance and functional traits.heig.t,s.ed mas.,clonal abilities.s.ecific leaf area and dis.ers.l method)controlled the filtering.of s.ecies.from the reg.onal pool into local *** Finding.0}n averag.,only 28%of s.ecies.found in the reg.onal pool es.ablis.ed in the ex-arable field s.tes.and 45%in the s.minatural g.as.land s.tes.indicating.that the s.ze of the reg.onal s.ecies.pool was.not limiting.local *** both g.as.land types.s.ecies.abundance in the reg.onal pool was.pos.tively correlated with s.ecies.occurrence at the local *** found evidence for both s.ecies.interaction filtering.and dis.ers.l limitation influencing.the local *** local and reg.onal proces.es.were thus.influencing.the filtering.of s.ecies.from the reg.onal s.ecies.pool into local *** addition,the ag. of the communities.influenced s.ecies.filtering.indicating.that community as.embly and the importance of different filters.in that proces. chang. over s.cces.ion.

关键词： as.embly rules community as.embly dis.ers.l limitation environmental filtering functional traits limiting.s.milarity

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An overview of various.control benchmarks.with a focus.on automotive control

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Control Theory and Technolog. 2019年第2期17卷 121-130页

作者： Lars.eriksson Vehicular s.s.ems Department of Electrical EngineeringLinkoping UniversitySE-581 83 LinkopingSweden

There exis.s.a g.p between control theory and control practice,i.e.,all control methods.s.g.es.ed by res.archers.are not implemented in real s.s.ems.and,on the other hand,many important in dus.rial problems.are not s.udied in the academic *** problems.can help clos. this.g.p and provide many opportunities.for members.in both the controls.theory and application *** g.al is.to s.rvey and g.ve pointers.to different g.neral controls.and modeling.related benchmark problems.that can s.rve as.ins.iration for future benchmarks.and then s.ecifically focus.the benchmark coverag. on automotive control eng.neering.*** the paper reflections.are g.ven on how different categ.ries.of benchmark des.g.ers.benchmark s.lvers.and third part us.rs.can benefit from providing.s.lving.and s.udying.benchmark *** paper als. collects.information about s.veral benchmark problems.and g.ves.pointers.to papers.than g.ve more detailed information about different problems.that have been pres.nted.

关键词： Benchmark automotive control robus. control robotics eng.ne control powertrain control s.s.em identification

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Real-time performance of DAE and ODE bas.d es.imators.evaluated on a dies.l eng.ne

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s.ience China(Information s.iences. 2018年第7期61卷 27-39页

作者： Erik H?CKERDAL Erik FRIs. Lars.eriksson s.ania CV AB Vehicular s.s.ems Link?ping University

Computation and s.mpling.time requirements.for real-time implementation of obs.rvers.is.s.udied. A common procedure for s.ate es.imation and obs.rver des.g. is.to have a s.s.em model in continuous.time that is.converted to s.mpled time with Euler forward method and then the obs.rver is.des.g.ed and implemented in s.mpled time in the real time s.s.em. When cons.dering.s.ate es.imation in real time control s.s.ems.for production there are often limited computational res.urces. This.becomes.es.ecially apparent when des.g.ing.obs.rvers.for s.iff s.s.ems.s.nce the dis.retized implementation requires.s.all s.ep leng.hs.to ens.re s.ability. One way to reduce the computational burden, is.to reduce the model s.iffnes. by approximating.the fas. dynamics.with ins.antaneous.relations. trans.orming.an ordinary differential equations.ODE)model into a differential alg.braic equation(DAE) model. Performance and s.mpling.frequency limitations.for extended Kalman filter(EKF)'s.bas.d on both the orig.nal ODE model and the reduced DAE model are here analyzed and compared for an indus.rial s.s.em. Furthermore, the effect of us.ng.backward Euler ins.ead of forward Euler when dis.retizing.the continuous.time model is.als. analyzed. The ideas.are evaluated us.ng.meas.rement data from a dies.l eng.ne. The eng.ne is.equipped with throttle, exhaus. g.s.recirculation(Eg.), and variable g.ometry turbines.Vg.) and the s.iff model dynamics.aris. as.a cons.quence of the throttle between two control volumes.in the air intake s.s.em. The proces. of s.mplifying.and modifying.the s.iff ODE model to a DAE model is.als. dis.us.ed. The analys.s.of the computational effort s.ows.that even thoug. the ODE, for each time-update, is.les. computationally demanding.than the res.lting.DAE, an EKF bas.d on the DAE model achieves.better es.imation performance than one bas.d on the ODE with les. computational effort. The main g.in with the DAE bas.d EKF is.that it allows.increas.d s.ep leng.hs.without deg.ading.the

关键词： es.imation learning DAE ODE EKF obs.rvability real-time

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Efficient cons.ruction of linear models.in materials.modeling.and applications.to force cons.ant expans.ons

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npj Computational Materials 2020年第1期6卷 527-537页

作者： Erik Frans.on Fredrik eriksson Paul Erhart Department of Phys.cs Chalmers University of TechnologyGothenburgSweden

Linear models.s.ch as.force cons.ant(FC)and clus.er expans.ons.play a key role in phys.cs.and materials.*** they can in principle be parametrized us.ng.reg.es.ion and feature s.lection approaches.the converg.nce behavior of thes. techniques.in particular with res.ect to thermodynamic properties.is.not well ***,we therefore analyze the efficacy and efficiency of s.veral s.ate-of-the-art reg.es.ion and feature s.lection methods.in particular in the context of FC extraction and the prediction of different thermodynamic properties.

关键词： properties thermodynamic cons.ant

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g.o-s.atial Mapping.of the Eas.ern Bus.veld Rus.enburg.Layered s.ite (RLs. in s.uth Africa

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Open Journal of g.olog. 2016年第5期6卷 285-301页

作者： O. A. Bamis.iye P. g. eriksson J. L. Van Rooy H. M. Brynard s. Foya Department of g.olog. University of Pretoria Pretoria South Africa Council for g.os.ences Pretoria South Africa

This.paper focus.d on the res.lts.of the Trend s.rface Analys.s.(Ts.) of the Rus.enburg.Layered s.ite (RLs. within the three major limbs.of the Bus.veld Complex. This.s.cond part focus.d on the Eas.ern Bus.veld Complex and dis.us.ed the major trends. g.ometry and ag. relations.ip of the various.s.ructures.within the Complex. The trend s.rface analys.s.of the Eas.ern Bus.veld reveals.that mos. of the res.dual pos.tive s.ructures.occur as.is.lated clos.res.with dome s.ape and are cons.s.ent with the location of the diapiric s.ructures.previous.y identified by g.ophys.cal and field mapping.techniques.

关键词： Eas.ern Bus.veld g.ometry Rus.enburg.Layered s.ite Trend s.rface Analys.s Trend

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g.o-s.atial Mapping.of the Northern Bus.veld Rus.enburg.Layered s.ite (RLs. in s.uth Africa

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Open Journal of g.olog. 2016年第5期6卷 302-313页

作者： O. A. Bamis.iye P. g. eriksson J. L. Van Rooy H. M. Brynard s. Foya Department of g.olog. University of Pretoria Pretoria South Africa Council for g.os.ences Pretoria South Africa

The focus.of this.paper is.on determination of the g.ometry and s.ratig.aphic contact pattern of the Rus.enburg.Layered s.ite (RLs. in the Northern Bus.veld Complex area us.ng.available borehole data and trend s.rface analys.s.technique. This.technique was.us.d to analys. over one hundred borehole log.data in the Northern Bus.veld Complex in order to des.ribe the g.ometric pattern and trends.of the RLs.rocks. The res.lts.demons.rate the us.fulnes. of this.technique in identifying.s.ructural features. Reg.onal trends.of each of the s.ratig.aphic units.reveal the pres.nce of reg.onal s.ructures.that were not obvious.at the s.rface. This.firs. part of the paper focus.d on the Northern Bus.veld Complex, while the s.cond and the third part focus.d on the eas.ern and wes.ern Bus.veld limbs.res.ectively.

关键词： Northern Bus.veld Complex Rus.enburg.Layered s.ite (RLs. Reg.onal Trends Res.dual s.ructures Ig.eous.Layering Trend s.rface Analys.s

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Editorial

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Control Theory and Technolog. 2019年第2期17卷 119-120页

作者： Tielong.s.EN Lars.eriksson Per TUNEs.AL s.phia Univers.ty Japan Linkoping.Univers.ty Sweden Lund Univers.ty Sweden

Control theory is.the field that is.deeply connected with *** control a phys.cal proces. or a dynarnica!s.s.em,the control law,s.-called control alg.rithm,is.us.ally deduced in mathematical *** leads.a lot of control theoris. to work on"pure control theory"and leave from the phys.cal *** g.p between control theory and practice is.s.metimes.pointed out by the eng.neers.s.nce a lot of advaneed control methods.provided by the res.arch comm unity of control theory cannot be directly implemented for s.lving.many in dus.rial *** problem plays.the role of bridg. between the theoretical res.arch and indus.rial ***,a benchmark problem is.propos.d by academic community or jointly with indus.rial community to hig.lig.t challeng. ng.is.ues.in a focus.d problem with comm on interes.ed practical backg.o *** control problem,many technical committees.of international federation of automatic control(IFAC)propos.d a lot of benchmark problems.in the *** benchmark problems.attracted attention from both of theoris. and control practitioners.es.ecially young.r res.archers.and s.udents.and pus.ed control theoris. to challeng. practical problem and innovation in indus.rial control *** s.ecial is.ue focus.d on the benchmark problems.in automotive s.s.em control which are mainly org.nized by I FAC technical committee and the related community s.ch as.the s.ciety of ins.rument and control eng.neers.s.CE),Japan.

关键词： Japan s.CE IFAC

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Body awarenes. therapy: A new s.rateg. for relief of s.mptoms.in irritable bowel s.ndrome patients

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World Journal of g.s.roenterolog. 2007年第23期13卷 3206-3214页

作者： EM eriksson IE Mller RH s.derberg.HT eriksson g. Kurlberg Departments.of s.rg.ry Sahlgrenska University Hospital/stra Gteborg Sweden Departments.of Medicine Sahlgrenska University Hospital/stra Gteborg Sweden

AIM: To compare irritable bowel s.ndrome (IBs. pa- tients.with apparently healthy pers.ns.and to evaluate body awarenes. therapy, which is.a phys.otherapeutic remedy focus.ng.on normalis.ng.tens.ons.in the body, for the treatment of IBs.with the hypothes.s.that altered body tens.on is.as.ociated with the s.ndrome. METHODs. Twenty-one IBs.patients.received body awarenes. therapy two hours.weekly for 24 wk. At bas.- line as.well as.after 12 and 24 wk, they underwent ex- aminations.including.res.urce oriented body examination in combination with body awarenes. s.ale evaluation and f illed in g.s.rointes.inal and ps.cholog.cal s.mptom ques.ionnaires. s.liva cortis.l was.analys.d. A g.oup of 21 apparently healthy pers.ns.underwent the s.me ex- aminations.once. REs.LTs. Compared to the apparently healthy g.oup, IBs.patients.s.ored hig.er at bas.line for g.s.rointes.inal and ps.cholog.cal s.mptoms. They s.owed more often alterations.in normal body tens.on patterns. as.well as.deviating.cortis.l s.opes.in s.liva. After 24 wk of body awarenes. therapy, their g.s.rointes.inal and ps.cholog.- cal s.mptoms.were reduced overall. s.matic s.mptoms.decreas.d in parallel with depres.ive s.mptoms. Whole body pain s.ore decreas.d, coping.ability as.well as.bio- chemical s.res. markers.improved. CONCLUs.ON: IBs.patients.s.ored hig.er for g.s.roin- tes.inal and ps.cholog.cal s.mptoms. and pres.nted with altered biochemical s.res. markers. Their body tens.on deviated compared to healthy controls. Furthermore,body awarenes. therapy g.ve relief of both s.matic com- plaints. ps.cholog.cal s.mptoms.and normalis.d body tens.on. Thes. finding.0}indicate that dis.orted tens.on cons.itutes.an important part of the s.mptoms.in IBs.

关键词： Irritable bowel s.ndrome Pain Cortis.l Phys.otherapy Body awarenes. therapy Ps.chos.matics g.s.rointes.inal tract s.res.

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