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Pres.nce of.Heat on an Inf.nite Plate with a Curvilinear Hole Having Two Poles

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Journal of.Modern Phys.cs 2015年第6期6卷 837-853页

作者： f. s. bayones Math. Dept. Faculty of Science Taif University Taif KSA

In the pres.nt paper Cauchy integral methods.have been applied to derive exact and expres.ions.f.r Gours.t’s.f.nction f.r the f.rs. and s.cond f.ndamental problems.of.is.tropic homogeneous.perf.rated inf.nite elas.ic media in the pres.nce of.unif.rm f.ow of.heat. f.r this. we cons.dered the problem of.a thin inf.nite plate of.s.ecif.c thicknes. with a curvilinear hole where the origins.lie in the hole is.conf.rmally mapped outs.de a unit circle by means.of.a s.ecif.c rational mapping. Moreover, the three s.res. components.σxx, σyy and σxy of.the boundary value problem in the thermoelas.icity plane are obtained. Many s.ecial cas.s.of.the conf.rmal mapping and f.ur applications.f.r dif.erent cas.s.are dis.us.ed and many main res.lts.are derived f.om the work.

关键词： An Elas.ic Plate Pres.nce of Heat Curvilinear Hole Cauchey Method Conf.rmal Mapping

On a Problem of.an Inf.nite Plate with a Curvilinear Hole ins.de the Unit Circle

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Applied Mathematics 2015年第1期6卷 206-220页

作者： f. s. bayones B. M. Alharbi Department of.Mathematics Faculty of Science Taif University Taif KSA

In this.work, we us.d the complex variable methods.to derive the Gours.t f.nctions.f.r the f.rs. and s.cond f.ndamental problem of.an inf.nite plate with a curvilinear hole C. The hole is.mapped in the domain ins.de a unit circle by means.of.the rational mapping f.nction. Many s.ecial cas.s.are dis.us.ed and es.ablis.ed of.thes. f.nctions. Als., many applications.and examples.are cons.dered. The res.lts.indicate that the inf.nite plate with a curvilinear hole ins.de the unit circle is.very pronounced.

关键词： Complex Variable Method An Inf.nite Plate Curvilinear Hole Conf.rmal Mapping Gours.t f.nctions

Human development acros. the lif.s.an John s. Dacey, John f. Travers.

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Plane Vibrations.in a Trans.ers.ly Is.tropic Inf.nite Hollow Cylinder Under Ef.ect of.the Rotation and Magnetic f.eld

2002年

作者： John s. Dacey John f. Travers.

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Computer Modeling in Engineering & s.iences 2017年第2期113卷 151-170页

作者： f.s.bayones A.M.Abd-Alla Math.Dept. Faculty of ScienceTaif UniversitySaudi Arabia Mathematics.Department Faculty of ScienceSohagEgypt

The aim of.this.paper is.to s.udy the ef.ects.of.rotation and magnetic f.eld on the plane vibrations.in a trans.ers.ly is.tropic material of.an inf.nite hollow *** natural f.equency of.the plane vibrations.in the cas. of.harmonic vibrations.has.been *** natural f.equencies.are calculated numerically and the ef.ects.of.rotation and magnetic f.eld are *** numerical res.lts.obtained have been illus.rated graphically to unders.and the behavior of.f.equency equation with dif.erent values.of.f.equencyωunder ef.ects.the rotation and magnetic *** was.made with the res.lts.obtained in the pres.nce and abs.nce of.the rotation and magnetic *** res.lts.indicate that the ef.ect of.rotation and magnetic f.eld are very pronounced.

关键词： Plane trans.ers.ly is.tropic rotating magnetic f.eld homogeneous trans.ers.ly is.tropic Natural f.equencies

Merging bound s.ates.in the continuum in an open acous.ic res.nator

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s.ience China(Phys.cs.Mechanics.& As.ronomy) 2025年第1期68卷 120-127页

作者： Lujun Huang Bin Jia Artem s.Pilipchuk s.bo Huang Chen s.en Almas.f.s.dreev Yong Li Andrey E.Miros.nichenko s.hool of.Phys.cs.and Electronic s.iences East China Normal UniversityShanghai 200241China Ins.itute of.Acous.ics Tongji UniversityShanghai 200092China L.V.Kirens.y Ins.itute of.Phys.cs Krasnoyarsk 660036Russia Department of.Mechanical Engineering Rowan UniversityGlassboro 08028USA s.hool of.Engineering and Technology University of New South Wales at CanberraACT 2610Australia

Bound s.ates.in the continuum(BICs.are perf.ctly localized res.nances.des.ite embedding in the continuum ***,an is.lated BIC is.very s.ns.tive to the s.ructure ***,we report merging acous.ic BICs.in a s.ngle open res.nator,robus. agains. the s.ructure *** f.nd that both s.mmetry-protected BIC and f.iedrich-Wintgen BIC are s.s.ained in a s.ngle coupled waveguide-res.nator *** varying the height and length of.the res.nator,thes. two BICs.move toward each other and merge into a s.ngle one at a critical *** to an individual BIC,the merged BIC is.robus. agains. f.brication error becaus. its.Q-f.ctor is.proportional toΔL^(−4),whereΔL embodies.the s.ructure *** es.ence of.this.extraordinary phenomenon is.perf.ctly explained by the two-and three-level approximations.of.the ef.ective non-Hermitian ***,we pres.nt direct experimental demons.rations.of.the moving and merging of.BICs.in a coupled 3D waveguide-res.nator,which are evidenced by the vanis.ing of.the linewidth of.f.no res.nance in the trans.is.ion *** res.lts.may f.nd exciting applications.in des.gning high-quality acous.ic s.urces.s.ns.rs.and f.lters.

关键词： acous.ic res.nances bound s.ate in the continuum high-Q res.nances

Numerical s.lution of.a Problem of.Thermal s.res.es.of.a Magnetothermoelas.ic Cylinder with Rotation by f.nite-Dif.erence Method

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Computers. Materials.& Continua 2021年第9期68卷 3339-3352页

作者： f.s.bayones A.M.Abd-Alla A.M.f.rhan Department of.Mathematics.and s.atis.ics College of ScienceTaif UniversityTaif21944Saudi Arabia Department of.Mathematics Faculty of ScienceSohag UniversityEgypt Phys.cs.Department Faculty of ScienceJazan UniversityJazanSaudi Arabia Phys.cs.Department Faculty of ScienceZagazig UniversityZagazigEgypt

The pres.nt article deals.with the inves.igation thermal s.res. of.a magnetothermoelas.ic cylinder s.bjected to rotation,open or clos.d circuit,thermal and mechanical boundary *** outer and inner s.rf.ces.of.the cylinder are s.bjected to both mechanical and thermal boundary conditions.A The trans.ent coupled thermoelas.icity in an inf.nite cylinder with its.bas. abruptly expos.d to a heat f.ux of.a decaying exponential f.nction of.time is.devis.d s.lve by the f.nite-dif.erence *** f.ndamental equations.s.s.em is.s.lved by utilizing an implicit f.nite-dif.erence *** current method is.a s.cond-order accurate in time and s.ace;it is.als. unconditionally *** illus.rate the pres.nt model’s.ef.iciency,we cons.der a s.itable material and acquire the numerical s.lution of.temperature,dis.lacement components.and the components.of.s.res.es.with time t and through the radial of.an inf.nite *** res.lts.indicate that the ef.ect of.coupled thermoelas.icity,magnetic f.eld,and rotation on the temperature,s.res.es.and dis.lacement is.quite *** order to illus.rate and verif. the analytical developments.the numerical s.lution of.partial dif.erential equations.s.res. components.dis.lacement components.and temperature is.carried out and computer s.mulated res.lts.are pres.nted *** s.udy is.helpf.l in the development of.piezoelectric devices.

关键词： Thermoelas.icity thermal s.res. f.nite-dif.erence method non-homogeneous.material rotation magnetic f.eld

s.il Properties.in Conif.rous.f.res. s.ands.Along a f.y As. Depos.tion Gradient in Eas.ern Germany

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Pedos.here 2005年第6期15卷 681-694页

作者： s. KLOs. f. MAKEs.HIN Ins.itute of.s.il s.ience Faculty of Forest Geo and Hydro Sciences Dresden University of Technology P.O. 1117 D-01735 Tharandt (Germany)

Phys.cal, chemical, and microbial properties.of.f.res. s.ils.s.bjected to long-term f.y as. depos.tions.were analyzed in s.ruce (Picea abies.(L.) Kars..) s.ands.of.eas.ern Germany on three f.res. s.tes.along an emis.ion gradient of.3 (high input), 6, and 15 km (low input) downwind of.a coal-f.red power plant. Pas. emis.ions.res.lted in an atypical high mas. of.mineral f.y as. cons.ituents.in the organic horizons.at the high input s.te of.128 t ha-1 compared to 58 t ha-1 at the low input s.te. Magnetic s.s.eptibility meas.rements.proved that the high mineral content of.the f.res. f.oor was.a res.lt of.f.y as. accumulation in thes. f.res. s.ands. f.y as. depos.tion in the organic horizons.at s.te I vers.s.III s.gnif.cantly increas.d the pH values. ef.ective cation exchange capacity, bas. s.turation and, with exception of.the L horizon, concentrations.of.mobile heavy metals.Cd, Cr, and Ni, while s.ocks.of.organic C generally decreas.d. A principal component analys.s.s.owed that organic C content and bas. s.atus.mainly controlled s.il microbial biomas. and microbial res.iration rates.at thes. s.tes. while pH and mobile f.actions.of.Cd, Cr, and Ni governed enzyme activities. Additionally, it was.hypothes.zed that long-term f.y as. emis.ions.would eventually des.abilize f.res. ecos.s.ems. Theref.re, the res.lts.of.this.s.udy could become a us.f.l tool f.r ris. as.es.ment in f.res. ecos.s.ems.that were s.bjected to pas. emis.ions.f.om coal-f.red power plants.

关键词： conif.rous.f.res.s f.y as. depos.tion magnetic s.s.eptibility microbial biomas. mobile heavy metal f.action

Tops.il as.Af.ected by Dung Depos.tion Under Res.ing Places.of.Red Howler Monkey (Alouatta s.niculus.

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Pedos.here 2008年第6期18卷 691-698页

作者： s. POUVELLE f. f.ER J. f. PONGE Mus.um National d'His.oire Naturelle CNRS UMR 7179 4 avenue du Petit-Chateau

The s.ort-term inf.uence of.dung depos.tion and the f.rther redis.ribution of.dung by dung beetles.were s.udied under a res.ing place of.the red howler monkey （Alouatta s.niculus. living in tropical ralnf.res.s.of.s.uth America. Monkey dung was.experimentally clumped on the f.eld in a place us.d by troops.of.howler monkeys.f.r res.ing in the Nouragues.Res.rve s.ation, f.ench Guiana. Dung-treated plots.were s.mpled s.rially over three weeks.and compared with controls.located in their immediate vicinity. The compos.tion of.the s.il matrix （top 10 cm） was.s.udied in s.cces.ive microlayers.us.ng an optical method. Under the inf.uence of.dung beetle activity, the tops.il became more homogeneous.by los.ng its.litter, its.content in earthworm f.eces.increas.d in the cours. of.time, and s.rf.ce mineral depos.ts.were penetrated by roots. The res.lts.were interpreted in the light of.pres.nt knowledge on the ef.ects.of.s.il animal activity on plant growth and s.rvival of.s.edlings.

关键词： dung beetle activity earthworm f.eces roots tropical ralnf.res.s

s.il Pore Characterization Us.ng f.ee s.f.ware and a Portable Optical Micros.ope

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Pedos.here 2013年第4期23卷 503-510页

作者： L. f. PIREs.f. s. BORGEs.s. PAs.ONI A. B. PEREIRA Department of.Phys.cs State University of Ponta Grossa (UEPG) Department of.s.il s.ience State University of Ponta Grossa (UEPG)

Total poros.ty （TP）, determined by image analys.s. pore type and pore s.ze dis.ribution were evaluated on impregnated s.il blocks.f.om an undis.urbed Brazilian s.ndy loam s.il us.ng a digital portable optical micros.ope. The f.ee s.f.ware Image J （vers.on 1.40g） was.us.d f.r image analys.s. Procedures.f.r s.il image collection and analys.s.were pres.nted. The image analys.s.allowed the evaluation of.pore s.zes.with diameters.ranging f.om 20 to 〉 1 000 μm. The f.llowing types.of.pores.were als. obtained： rounded, elongated and intermediate. The res.lts.M[owed the characterization of.the s.il as.moderately porous.（TP = 21.6%）. Rounded, intermediate and elongated pores.were res.ons.ble f.r 11.6%, 31.7% and 56.7% of.TP. In relation to pore s.ze 51.1% of.TP was.in the 100-500μm s.ze clas. and a third of.TP came f.om the pores.larger than 500μm.

关键词： image analys.s s.il poros.ty s.il s.ructure pore s.ze dis.ribution