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Do assortative mating and immigrant inviability help maintain population genetic structuring of an herbivore on a crop and a wild relative?

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Insect Science 2019年第2期26卷 283-296页

作者： ricardo ramirez-romero Delia Garibay-Benitez Ofelia Vargas-Ponce Andrea Joyce Julio S. Bernal Departamento de Produccion Agricola CUCBA Universidad de Guadalajara Zapopan Jalisco Mexico Departamento de Botanica y Zoologia CUCBA Universidad de Guadalajara Zapopan Jalisco Mexico Sierra Nevada Research Institute University of California Merced California USA Department of Entomology Texas A&M University College Station. Texas USA

Population genetic structuring is common among herbivorous insects and frequently is associated with divergent host plants, such as crops and their wild relatives. Previous studies showed population genetic structuring in corn leafhopper Dulbulus maidis in Mexico, such that the species consists of two sympatric, host plant-associated populations: an abundant and widespread "pestiferous” population on maize (Zea mays mays), and a small and localized "wild" population on perennial teosinte (Zea diploperennis). a maize wild relative with a limited distribution. This study addressed whether assortative mating and immigrant inviability mediate genetic structuring of corn leafliopper by comparing the mating and reproductive successes of pestiferous and wild females that colonize their nonassociated host plants against the successes of females colonizing their associated host plants. Assortative mating was assessed by comparing mating frequencies and premating and mating times among females of each population on each host plant: immigrant inviability was assessed by comparing, across two generations, the fecundity, survival, development time, sex ratio, and population growth rate among leafhopper populations and host plants. Our results showed that on maize, and compared to resident, pestiferous females, wild females were more likely to mate, and greater proportions of their offspring survived to adult stage and were daughters;consequently, the per-generation population growth rate on maize was greater for immigrant, wild leafhoppers compared to resident, pestiferous leafhoppers. Our results suggested that wild leafhoppers emigrating to maize have a fitness advantage over resident, pestiferous leafhoppers, while immigrant pestiferous and resident wild leafhoppers on teosinte have similar fitnesses.

关键词： crop domestication Dalbulus maidis ecological speciation host associated differentiation Zea diploperennis Zea mays mays

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Synthesis identification analysis for closed loop system

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Journal of Systems Engineering and Electronics 2021年第4期32卷 939-946页

作者： WANG Jianhong ricardo A.ramirez-Mendoza School of Electronic Engineering and Automation Jiangxi University of Science and TechnologyGanzhou 343100China School of Engineering and Sciences Tecnologico de MonterreyMonterrey 64849Mexico

The existing theories for closed loop identification with the linear feedback controller are very *** apply the existed theories directly in the control field,we propose a new idea about replacing the original unknown and nonlinear feedback controller with one approximated linear controller,while guaranteeing the equivalent property for the obtained closed loop *** on some statistical correlation functions,one condition is derived to show the equivalent property between the approximated linear controller and the original nonlinear *** detailed explicit form,corresponding to the approximated linear controller,is also ***,to give a complete analysis for closed loop identification,the cost function is rewritten as one extended expression,being convenient to *** spectral estimation is introduced to identify the unknown plant in the closed loop ***,the proposed theories are verified by one simulation example.

关键词： synthesis analysis closed loop system simplified function equivalent controller

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Nonlinear direct data-driven control for UAV formation flight system

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Journal of Systems Engineering and Electronics 2023年第6期34卷 1409-1418页

作者： WANG Jianhong ricardo A.ramirez-MENDOZA XU Yang School of Engineering and Sciences Tecnologico de MonterreyMonterrey 64849Mexico School of Civil Aviation Northwestern Polytechnical UniversityXi’an 710072China

This paper proposes the nonlinear direct data-driven control from theoretical analysis and practical engineering,i.e.,unmanned aerial vehicle(UAV)formation flight ***,from the theoretical point of view,consider one nonlinear closedloop system with a nonlinear plant and nonlinear feed-forward controller *** avoid the complex identification process for that nonlinear plant,a nonlinear direct data-driven control strategy is proposed to design that nonlinear feed-forward controller only through the input-output measured data sequence directly,whose detailed explicit forms are model inverse method and approximated analysis ***,from the practical point of view,after reviewing the UAV formation flight system,nonlinear direct data-driven control is applied in designing the formation controller,so that the followers can track the leader’s desired trajectory during one small time instant only through solving one data fitting *** most natural phenomena have nonlinear properties,the direct method must be the better *** system identification and control algorithms are required to be proposed for those nonlinear systems,and the direct nonlinear controller design is the purpose of this paper.

关键词： nonlinear system nonlinear direct data-driven control model inverse control unmanned aerial vehicle(UAV)formation flight.

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Introducing System Identification Strategy into Model Predictive Control

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Journal of Systems Science & Complexity 2020年第5期33卷 1402-1421页

作者： WANG Jianhong ricardo A.ramirez-Mendoza JORGE de J Lozoya Santos School of Electronic Engineering and Automation Jiangri University of Science and TechnologyGanzhou343000China School of Engineering and Sciences Tecnologico de MonterreyMonterreyAve.Eugenio Garza Sada 2501MonterreyN.L.64849Merico

As system identification theory and model predictive control are belonged to two different research fields separately,so one gap exists between these two *** alleviate this gap between them,one new idea proposed in this paper is to introduce system identification theory into model predictive *** the most important element in model predictive control is the prediction of the output value for a nonlinear system,then the problem of deriving the prediction of the output value can be achieved by system identification *** specifically,a Bayesian approach is applied for the nonparametric estimation by modeling the prediction as realizations of zero mean random *** comparing this kind of prediction corresponding to this Bayesian approach and the former direct weight optimization identification for nonlinear system,the authors see that if the unknown weights are chosen appropriately,these two approaches are equivalent to each *** on the obtained prediction of the output value,the authors substitute this prediction of the output value into one cost function of model predictive control,and then a quadratic programming problem with inequality constraints is *** to solve this quadratic programming problem,a detailed process about how to derive its dual form is *** the dual problem has a simple constraint set,it is amenable to the use of the common Gauss-Seidel algorithm,whose convergence can be shown ***,one simulation example confirms the proposed theoretical results.

关键词： Equivalence model predictive control nonparametric estimation system identification

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A Mean Curvature Regularized Based Model for Demodulating Phase Maps from Fringe Patterns

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Communications in Computational Physics 2018年第6期24卷 27-43页

作者： Carlos Brito-Loeza ricardo Legarda-Saenz Arturo Espinosa-romero Anabel Martin-Gonzalez CLIR at Facultad de Matematicas Universidad Autonoma de YucatanMexico

We introduce a variationalmethod for demodulating phasemaps fromfringe *** newmethod is based on themean curvature of the level sets of the phase surface that is used for *** performance of the method is illustrated w... 详细信息

关键词： Fringe analysis interferometry high-order regularization variational models

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Effectiveness of statins *** on reducing postprandial hypertriglyceridemia in dyslipidemic population:A systematic review and network meta-analysis

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Journal of Sport and Health Science 2022年第5期11卷 567-577页

作者： Laura Alvarez-Jimenez Alfonso Moreno-Cabanas Miguel ramirez-Jimenez Felix Morales-Palomo Juan FOrtega ricardo Mora-Rodriguez Exercise Physiology Lab at Toledo Sports Science DepartmentUniversity of Castilla-La ManchaToledo 45004Spain

Background:Individuals at risk of suffering cardiovascular disease(CVD) present with larger increases in blood trigyceride(TG) concentration after a high-fat meal than do healthy *** postprandial hypertriglyceride levels are an independent risk factor for *** of statins and a bout of prolonged exercise are both effective in lowering postprandial hypertriglyceride *** aimed to evaluate the comparative effectiveness of statins vs.a bout of aerobic exercise in reducing fasting and postprandial TG(PPTG) concentrations in indiv、duals at high nsk of developing ***:Thirty-seven sltudies from a systematic literature search of the PubMed,EMBASE,and Cochrane databases were included in this *** selected studies conducted trials involving statin therapy(n=20) or a bout of aerobic exercise(n=19) and measured their impact on PPTG levels as the *** studies analyzed both treatments and were included in *** meta-analysis was constructed using a random-effects model to calculate the mean difference(MD).The Student t test was used to compare the data sets for statins ***:Overall,statin and exercise interventions showed similar reductions in PPTG levels,with an MD of-0.65 mmol/L for statins(95% confidence interval(95%CI):-0.54 to-0.77;p <0.001) and-0.46 mmol/L for exercise(95%CI:-0.21 to-0.71;p <0.01).However,statins lowered fasting TG levels more than exercise(MD=-1.54 mmol/L,95%CI:-2.25 to-0.83;p=0.009).Conclusion:Although aerobic exercise is effective in lowering blood TG levels,statins seem to be more efficient,especially in the fasted state.A combination of exercise and statins might reveal a valuable approach to the treatment and prevention of *** studies are required to determine the underlying mechanisms and the possible additive effects of these interventions.

关键词： Aerobic exercise Cardiovascular disease Hydroxymethylglutaryl-CoA reductase inhibitor Meta-analysis Metabolic syndrome

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Engineering Geological Investigations for the Foundations of Large Structures-Examples of a Concrete Dam and a long Bridge in Portugal

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Journal of Mountain Science 2011年第2期8卷 296-306页

作者： ricardo OLIVEIRA COBA and New University of Lisbon Portugal

The safety of large structures requires adequate foundations, which implies a good knowledge of the geological and geotechnical conditions of the respective ground. In general, that is only possible through engineering geological studies which include proper site investigation techniques, adapted to the nature of the ground (rock mass or soil) and to the associated engineering problems. The paper illustrates the studies carried out for the design of the foundations of Ribeiradio 76 m high concrete gravity dam in a difficult rock mass and of Vasco da Gama Bridge, 13 km long, crossing the Tagus River in Lisbon, Portugal, through piles 75 m deep.

关键词： Geological investigation Foundations Concrete dam Bridge

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Deduction and Validation of an Eulerian-Eulerian Model for Turbulent Dilute Two-Phase Flows by Means of the Phase Indicator Function-Disperse Elements Probability Density Function

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Chinese Journal of Chemical Engineering 2000年第3期8卷 189-202页

作者： Santiago Laín ricardo Aliod MVT-UST Fachbereich Ingenieurwissenschaften Martin-Luther-UniversitatHalle-WittenbergD-06099Halle(Saale)GermanyFluid Mechanica DepartmentE.U.Politecnica de Huesca.University of ZaragozaCarretera Zaragoza km.6722071 HuescaSpain

A statistical formalism overcoming some conceptual and practical difficulties arising in existing two-phase flow (2PHF) mathematical modelling has been applied to propose a model for dilute 2PHF turbulent Hows. Phase interaction terms with a clear physical meaning enter the equations and the formalism provides some guidelines for the avoidance of closure assumptions or the rational approximation of these terms. Continuous phase averaged continuity, momentum, turbulent kinetic energy and turbulence dissipation rate equations have been rigorously and systematically obtained in a single step. These equations display a structure similar to that for single-phase flows. It is also assumed that dispersed phase dynamics is well described by a probability density function (pdf) equation and Eulerian continuity, momentum and fluctuating kinetic energy equations for the dispersed phase are deduced. An extension of the standard k-e turbulence model for the continuous phase is used. A gradient transport model is adopted for the dispersed phase fluctuating fluxes of momentum and kinetic energy at the non-colliding, large inertia limit. This model is then used to predict the behaviour of three axisymmetric turbulent jets of air laden with solid particles varying in size and concentration. Qualitative and quantitative numerical predictions compare reasonably well with the three different sets of experimental results, studying the influence of particle size, loading ratio and flow confinement velocity.

关键词： two-phase flow turbulence phase indicator function pdf ensemble average jet

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Comprehensive Euler/Lagrange modelling including particle erosion for confined gas-solid flows

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Particuology 2024年第1期84卷 209-235页

作者： Guiherme A.Novelletto ricardo Martin Sommerfeld Multiphase Flow Systems Institute of Process EngineeringOtto-von-Guericke-University MagdeburgHoher Weg 7b06120Halle(Saale)Germany

The present research aims to assess the capability of a comprehensive Euler/Lagrange approach for predicting gas-solid flows and the associated solid particle *** open-source code OpenFOAM®4.1 was used to carry out the numerical simulations,where the standard Lagrangian libraries were substantially extended to account for all necessary *** are tracked considering both translational and rotational motion as well as all relevant forces,such as gravity/buoyancy,drag and transverse lift due to shear and particle *** tracking time step was dynamically adapted ac-cording to the locally relevant time scales,which drastically reduces computational *** approaches are adopted to model particle turbulent dispersion,particle collisions with rough walls and particle-particle *** solid particle erosion models,available in the literature,were considered to estimate pipe bend *** study cases are provided to validate the adopted nu-merical approach and erosion models *** first case intends to evaluate the ability of the extended CFD code to predict the behaviour of gas-solid flows in pneumatic conveying *** goal is achieved by comparing the numerical results with the experimental data obtained by Huber(1997)and Huber and Sommerfeld(1994,1998)in a pneumatic conveying ***,the importance of considering inter-particle collisions and surface roughness for predicting particle velocity,mass flux and mean diameter distributions in gas-solid flows is *** second and third case intend to evaluate the ability of the erosion models in estimating bend erosion in diluted gas-solid *** erosion data obtained experimentally by Mazumder et al.(2008)and Solnordal et al.(2015)in very dilut pneumatic conveying systems is used for validating the numerical results,neglecting now inter-particle collisions and two-way *** a comprehensive analysis of the different influential properti

关键词： Pneumatic conveying Pipe bend Numerical calculation(CFD) Euler/Lagrange approach Erosion models Wall roughness

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Biological and chemical attributes of soils under forest species in Northeast Brazil

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Journal of Forestry Research 2020年第5期31卷 1959-1973页

作者： Olmar Baller Weber Maria Catia Barroso da Silva Cristiane Figueira da Silva Joao Alencar de Sousa Carlos Alberto Kenji Taniguch Deborah dos Santos Garruti ricardo Espindola romero Embrapa Tropical Agroindustry Rua Dra.Sara Mesquita2270PiciFortalezaCeara60511-110Brazil Centro de Ciencias e Tecnologia Universidade Estadual do CearaAv.Dr.Silas Munguba1700Campus do ItaperiFortaleza 60740-000Brazil Universidade Federal Rural do Rio de Janeiro BR 465Km 7SeropedicaRio De Janeiro 23890-000Brazil Depto Ciencia do Solo Universidade Federal do CearaCampus do PiciFortaleza 60021-970Brazil

Timber forests contribute to the sustainable development of the biomes in tropical *** aim of this study was to evaluate the biological and chemical properties of the soil as a consequence of the cover with native and non-native species in the Acarau basin,a transition area from the coast to the Brazilian semi-arid *** planted with four native species(Anadenanthera colubrina,Astronium fraxinifolium,Handroanthus impetiginosus,Colubrina glandulosa)and three exotic species(Acacia mangium,Casuarina equisetifolia,Eucalyptus urophylla)plus a non-forested agricultural area were evaluated for organic carbon contents,and microbial and chemical soil *** levels of soil organic carbon were highest in *** and *** *** basal soil respiration was observed but the microbial biomass was particularly low in the non-forested *** the ***,***,and *** plantations,elevated soil metabolic quotients were *** *** and *** plantations had the highest levels of easily extracted-glomalin related soil *** species affect concentrations of essential nutrients and the biological quality of the soil in different *** can also improve the biological and chemical properties of the soil in the coastal plains of tropical regions.

关键词： Soil quality Brazilian timber species Eucalyptus Acacia Casuarina

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