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Lattice Solid/Boltzmann Microscopic Model to Simulate Solid/Fluid Systems——A Tool to Study Creation of Fluid Flow Networks for Viable Deep Geothermal Energy

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Journal of Earth Science 2015年第1期26卷 11-19页

作者： Peter Mora Yucang Wang fernando Alonso-Marroquin MCM Global ToowongBrisbaneAustralia Earth Science and Resource Engineering CSIROKenmore Qld 4069BrisbaneAustralia School of Civil Engineering The University of SydneySydney NSW 2006Australia

SUMMARY： Realizing the potential of geothermal energy as a cheap, green, sustainable resource to provide for the planet＇s future energy demands that a key geophysical problem be solved first： how to develop and maintain a network of multiple fluid flow pathways for the time required to deplete the heat within a given region. We present the key components for micro-scale particle-based numerical modeling of hydraulic fracture, and fluid and heat flow in geothermal reservoirs. They are based on the latest developments of ESyS-Particle--the coupling of the lattice sofid model （LSM） to simulate the nonlinear dynamics of complex solids with the lattice Boltzmann method （LBM） applied to the nonlinear dynamics of coupled fluid and heat flow in the complex solid-fluid system. The coupled LSM/LBM can be used to simulate development of fracture systems in discontinuous media, elastic stress release, fluid injection and the consequent slip at joint surfaces, and hydraulic fractur- ing; heat exchange between hot rocks and water within flow pathways created through hydraulic fracturing; and fluid flow through complex, narrow, compact and gouge- or powder-f＇flled fracture and joint systems. We demonstrate the coupled LSM/LBM to simulate the fundamental processes listed above, which are all components for the generation and sustainability of the hot-fractured rock geothermal energy fracture systems required to exploit this new green-energy resource.

关键词： lattice Boltzmann particle-fluid interaction geothermal energy coupled lattice solid/lattice Boitzmann model discrete element method lattice solid model.

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Anemia and digestive diseases: An update for the clinician

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World Journal of Gastroenterology 2009年第37期15卷 4615-4616页

作者： fernando Gomollón Javier P Gisbert Digestive Diseases Service Clinical University Hospital CIBEREHD IACS Avenida San Juan Bosco 15 Zaragoza 50009 Spain Digestive Diseases Service University Hospital "La Princesa" CIBEREHD C/ Diego León 62 Madrid 28006 Spain

Anemia and iron deficiency are so common in digestive diseases that often are underestimated and undertreated. Our goal is to review from classif ication to treatment of the diverse types of anemias in different digestive diseases to update our knowledge on diagnosis and treatment. With the goal of improving the prognosis and quality of life of digestive diseases patients, we will review current transfusion, intravenous iron, and erythropoietin roles in the treatment of anemia.

关键词： Anemia Iron deficiency Inflammatory bowel disease Crohn's disease Ulcerative colitis

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A New Genus and Species of Damsel-Dragonfly (Odonata:Isophlebioidea:Campterophlebiidae) in the Middle Jurassic of Inner Mongolia,China

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Acta Geologica Sinica(English Edition) 2011年第4期85卷 733-738页

作者： Julian fernando PETRULEVICIUS HUANG Diying Andre NEL Museo de La Plata División Paleozoología Invertebrados-UNLPPaseo del Bosque s/nLa Plata（1900） and CONICETArgentina State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing 210008 China CNRS UMR 7205 Muséum National d＇Histoire NaturelleEntomologieCP 5045 Rue BuffonF-75005 ParisFrance

The campterophlebiid new genus and species Ctenogampsophlebia reni is described from the Middle Jurassic of Inner Mongolia,*** shows close similarities with the Lower to Middle Jurassic genera Gampsophlebia,and Petrophlebia,with closed and short subdiscoidal cells,confirming the attribution of these two other genera to the Campterophlebiidae.

关键词： Odonata Campterophlebiidae gen.nov. sp.nov. Jurassic China

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Comprehensive Survey and Critical Evaluation of the Performance of State-of-the-art LED Drivers for Lighting Systems

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Chinese Journal of Electrical Engineering 2021年第2期7卷 21-36页

作者： fernando Bento Antonio J.Marques Cardoso CISE-Electromechatronic Systems Research Centre University of Beira InteriorCovilhã6201-001Portugal

The adoption of light-emitting diodes(LEDs)for lighting applications is becoming increasingly relevant as this recent technology is *** the recent uptake of LED lighting technologies for distinctive end-uses,the research community has also committed to the development of an ever-increasing range of power electronic converters that are suitable for yielding maximum quality lighting,high efficiency,and long *** one of the most recent and promising technologies of the moment,it is vital to fully understand the performance and merits of each state-of-the-art LED lighting ***,this paper compiles essential information about a broad range of state-of-the-art LED lighting systems,aiming to compare their performances in terms of *** on the comparative analysis,the main merits and drawbacks of each LED lighting system architecture are ***,a detailed evaluation of the performance of a particular LED lighting system and the corresponding control strategy is developed,thereby enabling a clear view of the evolution of the performance of the system as a function of parameters like supply voltage and number of driver channels.

关键词： Efficiency analysis LED lighting AC-DC converters DC-DC converters

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Investigations for the assessment of adult patients presenting to the emergency department with supraventricular tachycardia

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World Journal of Emergency Medicine 2020年第1期11卷 54-59页

作者： Harith fernando Nicholas Adams Biswadev Mitra Emergency and Trauma Centre The Alfred HospitalMelbourneVictoriaAustralia National Trauma Research Institute The Alfred HospitalMelbourneVictoriaAustralia Department of Epidemiology and Preventive Medicine Monash UniversityMelbourneVictoriaAustralia

Dear editor,Patients with supraventricular tachycardia(SVT)commonly present to the emergency department(ED).Current guidelines[1,2]do not recommend routine pathology testing and a report on the topic has questioned their role.A systematic review concluded that troponin testing is commonly performed with a high proportion of positive fi ndings,but these results were not associated with major adverse cardiac events.[3]The conclusions of this review were limited by paucity of data and heterogeneity among studies.

关键词： tachycardia routine pathology

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CRISPR/Cas9: Development and Application in Rice Breeding

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Rice science 2019年第5期26卷 265-281页

作者： fernando Matías ROMERO Andrés GATICA-ARIAS Laboratory of Plant Biotechnology School of Biology/Research Center in Cellular and Molecular Biology University of Costa Rica

Rice(Oryza sativa L.)is an important staple food crop worldwide due to its adaptability to different environmental *** of its great economic and social importance,there is a constant requirement for new varieties with improved agronomic characteristics,such as tolerance to different biotic(such as bacterium,fungus,insect and virus)and abiotic stresses(such as salinity,drought and temperature),higher yield and better organoleptic and nutritional *** the new genome editing technologies,the clustered regularly interspaced short palindromic repeats(CRISPR)/CRISPR-associated protein(Cas)(CRISPR/Cas)system allows precise and specific edition in a targeted genome *** is one of the most frequently used techniques for the study of the function of new genes and for the development of mutant lines with enhanced tolerance to biotic and abiotic stresses,herbicide resistance or improved *** wide varieties of applications for this technology include simple non-homologous end joining,homologous recombination,gene replacement,and base *** this review,we analyzed how some of these applications have been used in rice cultivars to obtain rice varieties better adapted to current environmental conditions and market requirements.

关键词： rice CRISPR Cas genome editing biotic stress abiotic stress yield off-target mutation

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Slope reliability and back analysis of failure with geotechnical parameters estimated using Bayesian inference

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Journal of Rock Mechanics and Geotechnical Engineering 2019年第3期11卷 628-643页

作者： Luis-fernando Contreras Edwin T.Brown The University of Queensland St Lucia Campus

A Bayesian approach is proposed for the inference of the geotechnical parameters used in slope *** methodology involves the construction of posterior probability distributions that combine prior information on the parameter values with typical data from laboratory tests and site investigations used in *** posterior distributions are often complex,multidimensional functions whose analysis requires the use of Markov chain Monte Carlo(MCMC)*** procedures are used to draw representative samples of the parameters investigated,providing information on their best estimate values,variability and *** paper describes the methodology to define the posterior distributions of the input parameters for slope design and the use of these results for evaluation of the reliability of a slope with the first order reliability method(FORM).The reliability analysis corresponds to a forward stability analysis of the slope where the factor of safety(FS)is calculated with a surrogate model from the more likely values of the input *** Bayesian model is also used to update the estimation of the input parameters based on the back analysis of slope *** this case,the condition FS?1 is treated as a data point that is compared with the model prediction of *** analysis requires a sufficient number of observations of failure to outbalance the effect of the initial input *** parameters are updated according to their uncertainty,which is determined by the amount of data supporting *** methodology is illustrated with an example of a rock slope characterised with a Hoek-Brown rock mass *** example is used to highlight the advantages of using Bayesian methods for the slope reliability analysis and to show the effects of data support on the results of the updating process from back analysis of failure.

关键词： Bayesian analysis Hoek-Brown criterion Slope reliability Back analysis of failure

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ON DIFFERENTIAL STRUCTURES OF POLYNOMIAL SPACES IN CONTROL THEORY

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Journal of Systems Science and Systems Engineering 2012年第3期21卷 372-382页

作者： Baltazar Aguirre HERNANDEZ Martn Eduardo FRIAS-ARMENTA fernando VERDUZCO Depto.de Matematicas Universidad Autonoma Metropolitana-lztapalapa.Av.Sn.Rafael Atlixco no.186.Col.Vicentinalztapalapa 09340MexicoD.F. Depto.de Matematicas Universidad de Sonora.Blvd.Luis Encinas y Rosales s/n.Col.CentroHermosilloSonoraMexico.

A valuable number of works has been published about Hurwitz and Schur polynomials in order to known better their properties. For example it is known that the sets of Hurwitz and Schur polynomials are open and no convex sets. Besides, the set of monic Schur polynomials is contractible. Now we study this set using ideas from differential topology, and we prove that the space of Schur complex polynomials with positive leading coefficient, and the space of Hurwitz complex polynomials which leading coefficient having positive real part, have structure of trivial vector bundle, and each space of （Schur complex and real, Hurwitz complex） polynomials has a differential structure diffeomorphic to some known spaces.

关键词： Schur polynomials Hurwitz complex polynomials trivial vector bundle

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Rolling and sliding in 3-D discrete element models

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Particuology 2015年第6期13卷 49-55页

作者： Yucang Wang fernando Alonso-Marroquin William W. Guo School of Engineering and Technology Central Queensland University Australia School of Civil Engineering The University of Sydney Australia

Rolling and sliding play fundamental roles in the deformation of granular materials. In simulations of granular flow using the discrete element method （DEM）, the effect of rolling resistance at contacts should be taken into account. However, even for the simplest case involving spherical particles, there is no agreement on what is the best way to define rolling and sliding; various versions of definitions and calculations of rolling and sliding were proposed. Some even suggest that a unique definition for rolling and sliding is not possible. We re-check previous studies on rolling and sliding in DEMs and find that some researchers made a conceptual mistake when dealing with pure sliding between particles of different sizes. After considering the particle radius in the derivation of rolling velocity, the results yield a unique solution. Starting with clear and unique definitions of pure rolling and sliding, we present the detailed derivation and validate our results by checking two special cases of rolling. The decomposition of the relative motion is objective; that is, independent of the reference frame in which the relative motion is measured.

关键词： Discrete element method Roiling Sliding

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Revisiting rolling and sliding in two-dimensional discrete element models

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Particuology 2015年第1期13卷 35-41页

作者： Yucang Wang fernando Alonso-Marroquin Sheng Xue Jun Xie School of Engineering and Technology.Central Queensland University Earth Science and Resource Engineering The Commonwealth Scientific and Industrial Research Organisation(CSIRO) School of Civil Engineering The University of Sydney

It has long been recognized that the rotation of single particles plays a very important role in simulations of granular flow using the discrete element method （DEM）. Many researchers have also pointed out that the effect of rolling resistance at the contact points should be taken into account in DEM simulations. However, even for the simplest case involving two-dimensional circular particles, there is no agreement on the best way to define roiling and sliding, and different definitions and calculations of rolling and sliding have been proposed. It has even been suggested that a unique rolling and sliding definition is not possible. In this paper we assess results from previous studies on rolling and sliding in discrete element models and find that some researchers have overlooked the effect of particles of different sizes. After considering the particle radius in the derivation of rolling velocity, all results reach the same outcome： a unique solution. We also present a clear and simple derivation and validate our result using cases of rolling. Such a decomposition of relative motion is objective, or independent of the reference frame in which the relative motion is measured.

关键词： Discrete element method Rolling Sliding

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