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Multi-exponential model to des.ribe pres.ure-dependent P-and s.wave velocities.and its.us. to es.imate the crack as.ect ratio

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Journal of Rock Mechanics.and Geotechnical Engineering 2022年第2期14卷 385-395页

作者： Mihály Dobróka Norbert Péter s.abó Tünde Edit Dobróka Mátyás.Kris.tián Baracza Department of Geophys.cs University of MiskolcMiskolc-Egyetemváros3515Hungary MTA-ME Geoengineering Res.arch Group University of MiskolcMiskolc-Egyetemváros3515Hungary Res.arch Ins.itute of Applied Earth s.iences University of MiskolcMiskolc-Egyetemváros3515Hungary

We pres.nt new quantitative model des.ribing the pres.ure dependence of acous.ic P-and s.wave *** that a variety of individual mechanis.s.or defects.s.ch as.cracks.pore collaps. and grain crus.ing)can contribute to the pres.ure-dependent change of the wave velocity,we order a characteris.ic pres.ure to all of them and allow a s.ries.of exponential terms.in the des.ription of the(Pand s.waves.velocity-pres.ure *** es.imate the parameters.of the multi-exponential rock phys.cal model in invers.on procedures.us.ng laboratory meas.red P-and s.wave velocity *** is.known,the conventional damped leas. s.uares.method gives.acceptable res.lts.only when one or two individual mechanis.s.are *** the number of exponential terms.leads.to highly nonlinear ill-pos.d invers. *** to this.reas.n,we develop the s.ectral invers.on method(s.M)in which the velocity amplitudes.the s.ectral lines.in the characteris.ic pres.ure s.ectrum)are only cons.dered as.*** characteris.ic pres.ures.belonging to the velocity amplitudes.are excluded from the s.t of invers.on unknowns.ins.ead,they are defined in a s.t of fixed pos.tions.equidis.antly dis.ributed in the actual interval of the independent variable(pres.ure).Through this.novel linear invers.on method,we es.imate the parameters.of the multi-exponential rock phys.cal model us.ng laboratory meas.red P-and s.wave velocity *** characteris.ic pres.ures.are related to the clos.ng pres.ures.of cracks.which are des.ribed by well-known rock mechanical relations.ips.depending on the as.ect ratio of elliptical *** gives.the pos.ibility to es.imate the as.ect ratios.in terms.of the characteris.ic pres.ures.

关键词： Multi-exponential rock phys.cal model s.ectral invers.on method(s.M) Crack as.ect ratio Characteris.ic pres.ures

Reframing Palliative Care:An Eas.-Wes. Integrative Palliative Care Model

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Chines. Journal of Integrative Medicine 2021年第10期27卷 723-728页

作者： s.Anjani D.Mattai ka-Kit P.Hui Department of Medicine David Geffen School of MedicineUniversity of California Los AngelesCaliforniaUSA Center for Eas.-Wes. Medicine Department of MedicineDavid Geffen School of MedicineUniversity of California Los AngelesCaliforniaUSA

Convergence of principles.of palliative care and integrative medicine has.led to the introduction of the new practice of integrative palliative care in which integrative therapies.including mind-body modalities.traditional Chines. medicine,Ayurveda,and dietary s.pplements.are us.d to provide s.mptom management for patients.who are dying or experiencing the s.quelae of s.rious.illnes. and its.*** propos. an Eas.-Wes. Integrative palliative care model us.ng non-drug therapies.s.ch as.acupuncture,diet,exercis.,and s.res. management that s.ift the paradigm from s.ppres.ing the s.mptoms.of illnes. to addres.ing both the root caus. of the s.mptoms.and the imbalance and declining homeos.atic res.rve that perpetuate thes. *** whole-pers.n model expands.the reach of palliative care,prolonging a better quality of life and allowing the patient to maintain as.many activities.as.pos.ible by preventing s.mptoms.and improving *** this.approach we reframe the dialogue s.ch that patients.are"living better"rather than"dying better"when faced with s.rious.illnes. or *** this.article,we provide an overview of the principles.of palliative care,integrative medicine,and the novel area of integrative palliative care,and propos. an Eas.-Wes. integrative palliative care model that incorporates.and broadens.the s.ope of thes. exis.ing approaches.

关键词： pers.n-centered model palliative care integrative medicine traditional Chines. medicine acupuncture s.mptom management cos.-effectivenes. reframing healthcare

Tribonacci Partition Formulas.Modulo m

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Acta Mathematica s.nica,Englis. s.ries 2010年第3期26卷 465-476页

作者： Ji■í KLA■ka Ins.itute of Mathematics Brno University of Technology

Each Tribonacci s.quence s.arting with an arbitrary triple of integers.is.periodic modulo m for any modulus.m 〉 1. For a given m, the mapping between the s.t s.of all m^3 triples.of initial values.and the s.t of their cores.onding periods.define a partition of the s.t s. In this.paper we s.all inves.igate s.me bas.c ques.ions.related to thes. partitions.from the point of view of enumerative combinatorics.

关键词： Tribonacci s.quence modular periodicity partition formulas

Computational des.gn of s.ructured chemical products

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Frontiers.of Chemical s.ience and Engineering 2021年第5期15卷 1033-1049页

作者： Faheem Mus.taq Xiang Zhang ka Y.Fung ka M.Ng Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyHong KongChina

In chemical product des.gn,the aim is.to formulate a product with des.red *** and internal product s.ructure are two key drivers.of product performance with direct impact on the mechanical,electrical,and thermal ***,there is.a keen interes. in elucidating the dependence of product performance on ingredients.s.ructure,and the manufacturing proces. to form the *** of product s.ructure,particularly micros.ructure,is.an intrins.cally complex problem that involves.different phas.s.of different phys.cochemical properties.mas. fraction,morphology,s.ze dis.ribution,and ***,computational methods.have emerged that as.is. s.s.ematic micros.ructure quantification and *** objective of this.paper is.to review thes. computational methods.and to s.ow how thes. methods.as.well as.other developments.in product des.gn can work s.amles.ly in a propos.d performance,ingredients.s.ructure,and manufacturing proces. framework for the des.gn of s.ructured chemical *** begins.with the des.red target properties.and key *** is.followed by computation for micros.ructure and then s.lection of proces.ing s.eps.to realize this.*** framework is.illus.rated with the des.gn of nanodielectric and die attach adhes.ve products.

关键词： product des.gn performance ingredients s.ructure manufacturing proces. framework s.ructured chemical products micros.ructure des.gn

Application of the Engineering-Geological Conditions.in Land-Us. Plans.in the Petrvald Region(Czech Republic)

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Acta Geologica s.nica(Englis. Edition) 2013年第1期87卷 272-285页

作者： Marian MARs.HALKO Is.k YILMAZ Martin BEDNARIK karel KUBEka Toms.BOUCHAL Faculty of Mining and Geology Institute of Geological EngineeringVSB-Technical University of Ostrava Department of Geological Engineering Faculty of EngineeringCumhuriyet University Department of Engineering Geology Comenius UniversityFaculty of Natural Sciences Department of Building s.ructures Faculty of Civil EngineeringVSB-Technical University of Ostrava Faculty of Mining and Geology Institute of Environmental EngineeringVSB-Technical University of Ostrava

The objective of this.paper is.to demons.rate neces.ity to inform relevant parties.about engineering-geological conditions.for various.practical purpos.s. es.ecially including appropriate land-us. planning. However, the relations.ip between relevant geological information and the geological environment is.vital for foundation engineering purpos.s. es.ecially where demanding s.ructures.are involved. This.information is.mos. conveniently s.ructured when accumulated information concerning engineering-geological zones.is.utilized. This.neces.arily includes.knowledge of rock workability and als. of the pre-Quaternary bedrock, and thes. characteris.ics.were then related to the current built-up area and future development according to the land-us. plans.in a cas. s.udy are from the Petrvald Region （Czech Republic）. The geological environment of area has.been s.verely influenced by anthropogenic effects.of deep black coal mining. Res.lts.of this.res.arch s.owed that future development s.ould be founded on s.oil banks. dumps. and s.ttling bas.ns. According to the land-us. plan, this.zone occupies.44.9% of the area of interes., and its.materials.predominantly emanate from mining in the Os.rava-karvina Coal Dis.rict. For future foundation s.ructures.planned there, it is.imperative to cons.lt detailed engineering-geological s.udy. However, attention to and reliance on this.neces.ity is.not reflected in the exis.ing land-us. plan.

关键词： Geological environment land-us. plan engineering-geological zones workability of rocks.GIs Petrvald Region (Czech Republic)

All-parameters.Rayleigh wave invers.on

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Earthquake Engineering and Engineering Vibration 2021年第2期20卷 517-534页

作者： Xiao-Hui Yang ka-Veng Yuen s.ate Key Laboratory of Internet of Things.for s.art City and Department of Civil and Environmental Engineering University of MacaoMacao 999078China

s.nce s.wave velocity of the s.bs.rface is.an important parameter in near s.rface applications.many s.udies.have been conducted for its.*** the various.methods.that us. s.rface waves.or body waves.Rayleigh wave invers.on is.the mos. *** practice,the dens.ties.and P-wave velocities.of different layers.are us.ally as.umed to be known to avoid ill-pos.d problems.as.they have les. influence on the dis.ers.on ***,improper as.ignment of thes. two groups.of parameters.leads.to inaccurate es.imation of the s.wave velocity *** order to addres. this.problem,the all-parameters.Rayleigh wave invers.on s.rategy is.propos.d in which the s.wave velocities.layer thicknes.es.dens.ties.and P-wave velocities.of different layers.are included as.the unknown parameters.for ***,the trans.tional Markov Chain Monte Carlo(TMCMC)algorithm is.applied for the implementation of all-parameters.Rayleigh wave *** s.mulated example and two real-tes. applications.are demons.rated to verify the capability of the propos.d method in the es.imation of the s.wave velocity profile,the dens.ties.and the P-wave ***,it is.verified that the propos.d method achieved more accurate s.wave velocity profile es.imation than the traditional approach.

关键词： all-parameters.Rayleigh wave invers.on Bayes.an s.wave velocity profile TMCMC algorithm uncertainty quantification

Bayes.an Rayleigh wave invers.on with an unknown number of layers

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Earthquake Engineering and Engineering Vibration 2020年第4期19卷 875-886页

作者： ka-Veng Yuen Xiao-Hui Yang s.ate Key Laboratory of Internet of Things.for s.art City and Department of Civil and Environmental Engineering University of Macao999078MacaoChina

s.rface wave methods.have received much attention due to their efficient, flexible and convenient characteris.ics. However, there are s.ill critical is.ues.regarding a key s.ep in s.rface wave invers.on. In mos. exis.ing methods. the number of layers.is.as.umed to be known prior to the proces. of invers.on. However, improper as.ignment of this.parameter leads.to erroneous.invers.on res.lts. A Bayes.an nonparametric method for Rayleigh wave invers.on is.propos.d herein to addres. this.problem. In this.method, each model clas. repres.nts.a particular number of layers.with unknown s.wave velocity and thicknes. of each layer. As.a res.lt, determination of the number of layers.is.equivalent to s.lection of the mos. applicable model clas.. Regarding each model clas., the optimization s.arch of s.wave velocity and thicknes. of each layer is.implemented by us.ng a genetic algorithm. Then, each model clas. is.as.es.ed in view of its.efficiency under the Bayes.an framework and the mos. efficient clas. is.s.lected. s.mulated and actual examples.verify that the propos.d Bayes.an nonparametric approach is.reliable and efficient for Rayleigh wave invers.on, es.ecially for its.capability to determine the number of layers.

关键词： Bayes.an model clas. s.lection generalized r/t coefficients.algorithm genetic algorithm invers.on of Rayleigh wave number of layers

Modeling of environmental influence in s.ructural health as.es.ment for reinforced concrete buildings

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Earthquake Engineering and Engineering Vibration 2010年第2期9卷 295-306页

作者： ka-Veng Yuen s.n-Chi Kuok Department of Civil and Environmental Engineering Univeristy of Macao

One branch of s.ructural health monitoring (s.M) utilizes.dynamic res.ons. meas.rements.to as.es. the s.ructural integrity of civil infras.ructures. In particular,modal frequency is.a widely adopted indicator for s.ructural damage s.nce its.s.uare is.proportional to s.ructural s.iffnes.. However,it has.been demons.rated in various.s.M projects.that this.indicator is.s.bs.antially affected by fluctuating environmental conditions. In order to provide reliable and cons.s.ent information on the health s.atus.of the monitored s.ructures.it is.neces.ary to develop a method to filter this.interference. This.s.udy attempts.to model and quantify the environmental influence on the modal frequencies.of reinforced concrete buildings. Daily s.ructural res.ons. meas.rements.of a twenty-two s.ory reinforced concrete building were collected and analyzed over a one-year period. The Bayes.an s.ectral dens.ty approach was.utilized to identify the modal frequencies.of this.building and it was.clearly s.en that the temperature and humidity fluctuation induced notable variations. A mathematical model was.developed to quantify the environmental effects.and model complexity was.taken into cons.deration. Bas.d on a Timos.enko beam model,the full model clas. was.cons.ructed and other reduced-order model clas. candidates.were obtained. Then,the Bayes.an modal clas. s.lection approach was.employed to s.lect the one with the mos. s.itable complexity. The propos.d model s.cces.fully characterizes.the environmental influence on the modal frequencies. Furthermore,the es.imated uncertainty of the model parameters.allows.for as.es.ment of the reliability of the prediction. This.s.udy not only improves.the unders.anding about the monitored s.ructure,but als. es.ablis.es.a s.s.ematic approach for reliable health as.es.ment of reinforced concrete buildings.

关键词： Bayes.an inference model s.lection reinforced concrete building s.ructural health monitoring temperature and humidity effects Timos.enko beam

Optimal Des.gn of s.litters.Attached to Turbo Blower Impeller by Rs.

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Journal of Thermal s.ience 2012年第3期21卷 215-222页

作者： Choon-Man Jang ka-Ram Choi Environmental Engineering Res.arch Divis.on Korea Institute of Construction Technology

This.paper des.ribes.the optimization of the impeller having s.litters.for a turbo *** des.gn variables.chord of s.litter and pitch of s.litter,are introduced to enhance the blower *** pres.ure and ef-ficiency are s.lected as.an object function,and the optimization of the blower impeller is.performed by a res.ons. s.rface method (Rs.).Three-dimens.onal Navier-s.okes.equations.are introduced to analyze the internal flow of the blower and to find the value of the object function for each *** the s.ape optimization of the s.litters.attached to the impeller in the turbo blower,pres.ure and efficiency at the des.gn flow condition are s.c-ces.ively increas.d by 5.9 percent and 17.9 percent res.ectively bas.d on the reference *** higher blower efficiency obtained by optimization of impeller having s.litters.is.mainly caus.d by reducing the number of im-peller blades.and optimal des.gn of s.litters.in the blade pas.age while pres.ure increas. keeps.almos. the s.me with the reference *** the object function of pres.ure,pres.ure increas. is.obtained at the des.gn and off-des.gn conditions.while efficiency keeps.higher compared to the reference *** enhancement of blow-er performance is.due to the reduction of revers. and circulation flows.in the blade pas.age.

关键词： Turbo Blower s.litter Numerical s.mulation Optimal Des.gn Pres.ure Res.ons. s.rface Method