检索结果-南通市图书馆

Building Simulation 2024年第5期17卷 839-855页

作者： Pablo Aparicio-Ruiz Elena Barbadilla-Martin Jose Guadix Jesus Munuzuri Grupo de ingenieria de Organizacion Escuela Tecnica Superior de IngenieriaUniversidad de SevillaCamino de los Descubrimientos S/N41092SevilleSpain

Since indoor clothing insulation is a key element in thermal comfort models,the aim of the present study is proposing an approach for predicting it,which could assist the occupants of a building in terms of recommendations regarding their *** that,a systematic analysis of input variables is exposed,and 13 regression and 12 classification machine learning algorithms were developed and *** results are based on data from 3352 questionnaires and 21 input variables from a field study in mixed-mode office buildings in *** temperature at 6 a.m.,indoor air temperature,indoor relative humidity,comfort temperature and gender were the most relevant features for predicting clothing *** comparing machine learning algorithms,decision tree-based algorithms with Boosting techniques achieved the best *** proposed model provides an efficient method for forecasting the clothing insulation level and its application would entail optimising thermal comfort and energy efficiency.

关键词： clothing insulation simulation adaptive thermal comfort behavioural adaptive actions machine learning

Compatibility of early natural enemy introductions in commercial pepper and tomato greenhouses with repeated pesticide applications

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Insect Science 2020年第5期27卷 1111-1124页

作者： Beatriz Dader Ignacio Colomer Angeles Adan Pilar Medina Elisa Vinuela Unidad de Proteccion de Cultivos Escuela Tecnica Superior de Ingenieria AgronomicaAlimentaria y de Biosistemas(ETSIAAB)Universidad Polit^cnica de Madrid(UPM)MadridSpain departamento de ingenieria Rural Escuela Superior de IngenieriaUniversidad de AlmeriaAlmeriaSpain

Successful integrated pest management in protected crops implies an evalu-ation of the compatibility of pesticides and natural enemies(NE),as control strategies that only rely on one tactic can fail when pest populations exceed NE activity or pests become resistant to *** in Almeria(Spain),growers release NE prior to transplanting or early in the crop cycle to favor their settlement before pest arrival because this improves biocontrol efficacy,although it extends pesticide exposure *** pur-pose of this research was to evaluate the compatibility of two applications of pesticides with key NE in 2-year trials inside tomato and sweet pepper commercial greenhouses:Nesidiocoris tenuis(Reuter)(Hemiptera:Miridae),Orius laevigatus(Say)(Hemiptera:Anthocoridae)and Amblyseius swirskii(Athias-Henriot)(Acari:Phytoseidac).In tomato,flubendiamide and chlorantraniliprole(IOBC category 1)were compatible with ***,but chlorpyrifos.:methyl and spinosad(IOBC categories 2-3),which efectively reduced Tiuta absoluta(Meyrick)(Lepidoptera:Gelechidae)density,compromised its predatory *** sweet pepper,chlorantraniliprole(IOBC category 1)was the only pesticide compatible with *** while chlorantraniliprole,emamectin benzoate,spirote-tramat and pymetrozine were harmless(IOBC category 1)to Amblyseius swirskii,and sulfoxaflor slightly harmful(IOBC category 2)to this phytoseiid predator.

关键词： Amblyseius swirskii chemical control Frankliniella occidentalis Nesidiocoris tenuis Orius laevigatus Tuta absoluta

CLT Fabricated with Gmelina arborea and Tectona grandis Wood from Fast-Growth Forest Plantations: Physical and Mechanical Properties

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2022年第1期10卷 1-17页

作者： Freddy Munoz Carolina Tenorio Roger Moya Angel Navarro-Mora escuela de ingenieria Forestal Instituto Tecnologico de Costa RicaCartago159-7050Costa Rica escuela de ingenieria en Construccion Instituto Tecnologico de Costa RicaCartago159-7050Costa Rica

Fabrication and use of Cross Laminated Timber(CLT)using tropical woods is still limited at *** objective of the present study aims to determine the possibility of using CLT panels of 3 and 5 layers,fabricated withTectona grandis and Gmelina arborea wood using adhesive of isocyanate polymer emulsion system catalyzed with polymeric ***,water absorption,density,flexure test,compression and glue-line shear were evaluated using ANSI/APA PRG320-2012 ASTM D198 and ASTM D4761 *** results showed that CLT panels of *** presented higher values of density,less water absorption and lower delamination,with no evident differences between the CLT of 3 and 5 *** high density of *** resulted in higher values of the mechanical *** flatwise and edgewise flexure tests in 5-layer CLT panels of both species pre-sented higher values of bending stiffness compared to those of 3-layer CLT *** the bending stress values in 3-layer CLT panels were higher than for 5-layer CLT *** for shear stress in bending flatwise,in both species,3-layer CLT surpassed 5-layer CLT panels,but in the edgewise test no differences were *** MOE and Fc in the compression test were superior in relation to the edgewise *** and Fc in compres-sion flatwise in 3-layer CLT was greater than in 5-layer CLT in both species,but edgewise these values were higher in 5-layer CLT *** most common failures were stress and delamination in the flexure test,whereas in the compression test these were:shearing,splitting and *** the glue-line shear test no differences were observed between CLT panels of 3 and 5 layers for both species.

关键词： Structural elements sustainable material building material tropical wood wood of plantation

Rainfall Sensitivity to Microphysics and Planetary Boundary Layer Parameterizations in Convection-Permitting Simulations over Northwestern South America

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Meteorological Research 2024年第4期38卷 805-825页

作者： K.Santiago HERNANdeZ Sebastian GOMEZ-RIOS Juan J.HENAO Vanessa ROBLEDO Alvaro RAMiREZ-CARDONA Angela M.RENDON Geolimna Escuela AmbientalFacultad de IngenieriaUniversidad de AntioquiaMedellin 050010Colombia Grupo de ingenieria y Gestion Ambiental(GIGA) Escuela AmbientalFacultad de IngenieriaUniversidad de AntioquiaMedellin 050010Colombia Division of Atmospheric Sciences Desert Research InstituteRenoNV 89512USA

Convection-permitting modeling allows us to understand mechanisms that influence rainfall in specific ***,microphysics parameterization(MP) and planetary boundary layer(PBL) schemes remain an important source of uncertainty,affecting rainfall intensity,occurrence,duration,and ***,we study the sensitivity of rainfall to three MP [Weather Research and Forecasting(WRF) Single-Moment 6-class(WSM6),Thompson,and Morrison] and two PBL [the Yonsei University(YSU) and Mellor–Yamada Nakanishi Niino(MYNN)] schemes with a convection-permitting resolution(4 km) over northwestern South America(NWSA).Simulations were performed by using the WRF model and the results were evaluated against soundings,rain gauges,and satellite data,considering the spatio-temporal variability of rainfall over diverse regions prone to deep convection in *** and PBL schemes largely influenced simulated rainfall,with better results for the less computationally expensive WSM6 MP and YSU PBL *** rain gauges and satellite estimates,simulations with Morrison MP overestimated rainfall,especially westward of the Andes,whereas the MYNN PBL underestimated precipitation in the Amazon–Savannas *** found that the uncertainty in the rainfall representation is highly dependent on the region,with a higher influence of MP in the Colombian Pacific and PBL in the Amazon–Savannas *** analyzing rainfall-related processes,the selection of both MP and PBL parameterizations exerted a large influence on the simulated lower tropospheric moisture flux and moisture *** schemes significantly influenced the downward shortwave radiation,with MYNN simulating a greater amount of low clouds,which decreased the radiation ***,latent heat fluxes were greater for YSU,favoring moist convection and *** schemes had a marked impact on vertical ***,Morrison MP showed stronger convection and higher precipitation rates,which is assoc

关键词： sensitivity microphysics planetary boundary layer(PBL) Weather Research and Forecasting(WRF) processes

Kinematic analysis of flexible bipedal robotic systems

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2024年第5期45卷 795-818页

作者： R.FAZEL A.M.SHAFEI S.R.NEKOO department of Mechanical Engineering Shahid Bahonar University of KermanKerman ***Iran departamento de ingenieria de Sistemas y Automatica Escuela Técnica Superior de IngenieriaUniversidad de SevillaSeville 41092Spain

In spite of its intrinsic complexities,the passive gait of bipedal robots on a sloping ramp is a subject of interest for numerous *** distinguishes the present research from similar works is the consideration of flexibility in the constituent links of this type of robotic *** is not a far-fetched assumption because in the transient(impact)phase,due to the impulsive forces which are applied to the system,the likelihood of exciting the vibration modes increases ***,the human leg bones that are involved in walking are supported by viscoelastic muscles and ***,for achieving more exact results,it is essential to model the robot links with viscoelastic *** this end,the Gibbs-Appell formulation and Newton's kinematic impact law are used to derive the most general form of the system's dynamic equations in the swing and transient phases of *** most important issue in the passive walking motion of bipedal robots is the determination of the initial robot configuration with which the system could accomplish a periodic and stable gait solely under the effect of gravitational *** extremely unstable nature of the system studied in this paper and the vibrations caused by the impulsive forces induced by the impact of robot feet with the inclined surface are some of the very serious challenges encountered for achieving the above-mentioned *** overcome such challenges,an innovative method that uses a combination of the linearized equations of motion in the swing phase and the algebraic motion equations in the transition phase is presented in this paper to obtain an eigenvalue *** solving this problem,the suitable initial conditions that are necessary for the passive gait of this bipedal robot on a sloping surface are *** effects of the characteristic parameters of elastic links including the modulus of elasticity and the Kelvin-Voigt coefficient on the walking stability of this type of

关键词： bipedal robot flexible link swing phase transient phase eigenvalue problem Kelvin-Voigt coefficient

First-principle calculations of magnetic properties of Ho_(6)(Fe,Mn)Bi_(2)compounds

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第11期43卷 6034-6047页

作者： Angel J.Garcia-Adeva Estibaliz Apinaniz Aritz Herrero Ivan R.Aseguinolaza Alberto Oleaga departamento de Fisica Aplicada Escuela de Ingenieria de V itoria-GasteizUniversidad del Pais V asco UPV/EHU01006 V itoria-GasteizSpain departamento de Fisica Aplicada Escuela de Ingenieria de BilbaoUniversidad del Pais V asco UPV/EHU48013 BilbaoSpain

The magnetic properties of Ho_(6)MnBi_(2)and Ho_(6)FeBi_(2)crystals are investigated by means of density functional *** materials are currently an active subject of research in the context of magnetic refrigeration applications since they exhibit a remarkable magnetocaloric *** this work,the equation of state,density of states and magnetic moments are calculated and compared with previous experimental results for these ***,the Curie temperatures for the paramagnetic to ferromagnetic phase transition observed in these systems are calculated from first *** the calculated quantities are in reasonable agreement with experimental data,which suggests that density functional theory could provide a reliable framework to theoretically investigate the magnetic properties of intermetallic ternary compounds.

关键词： Intermetallic compounds Rare earths Magnetic properties Magnetocaloric effect density functional theory Heisenberg model

development of heartwood,sapwood,bark,pith and specific gravity of teak(Tectona grandis)in fast-growing plantations in Costa Rica

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2020年第2期31卷 667-676页

作者： Alexander Berrocal Johana Gaitan-Alvarez Roger Moya David Fernandez-Solis Edgar Ortiz-Malavassi Instituto Tecnologico de Costa Rica Escuela de Ingenieria ForestalCartago Apartado 159-7050Costa Rica

To elucidate the development of heartwood,bark,sapwood,pith and specific gravity of wood in fastgrowing teak(Tectona grandis)plantations in Costa Rica,we sampled three trees in each of 55 plantations and modelled each variable with age,site and different tree *** and stand density of plantations were significant correlated with stem diameter at breast height and total height of the *** of heartwood was initiated at the age of 4-year-old and increased in direct proportion with *** age of plantation had a significant relationship with stem diameter at breast height,heartwood percentage,sapwood thickness,sapwood percentage,percentage of bark,pith diameter and percentage,and specify *** model for these tree parameters was model with these parameters as dependent variable and in relation to age as independent variable.

关键词： Teak Growth Tree morphology parameters Morphology Tree development

Semantic framework of event detection in emergency situations for smart buildings

在线全文

学校读者我要写书评

暂无评论

Digital Communications and Networks 2022年第1期8卷 64-79页

作者： Yudith Cardinale Gabriel Freites Edgar Valderrama Ana Aguilera Chinnapong Angsuchotmetee departamento de Computacidn Universidad Simon BolivarCaracasVenezuela escuela de ingenieria Informatica Universidad de ValparaisoValparaisoChile Faculty of Science Prince of Songkla University Thailand

Multimedia Sensor Networks(MSNs)have enhanced the ability to analyze the environment and provide responses based on its current ***,MSNs are composed of scalar and multimedia sensors that have fixed ***,given the advancement of smart mobile device technologies,it is currently possible to dynamically integrate mobile sensors into *** this paper,we propose a formal platform to manage MSNs and the data gathered from them to detect complex *** main contributions include:M^(2)SSN-Onto,a Mobile and Multimedia Semantic Sensor Networks Ontology;Py-CEMiD,an engine for detecting complex events and generate reactions to them;a mobile device location engine to locate mobile sensors;and a proof-of-concept in the context of detecting emergency situations in smart *** scenarios are validated for emergency events,combining simulated sensor measurements with real measurements of mobile *** show complex events can be detected in near real time(less than 1 s).

关键词： Multimedia sensor network Semantic web Event processing Ontology Geolocalisation

Measurement and modelization of VLE of binary mixtures of propyl acetate,butyl acetate or isobutyl acetate with methanol at pressure of 0.6 MPa

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2016年第5期24卷 630-637页

作者： P.Susial D.Garcia R.Susial Y.C.Clavijo A.Martin escuela de lngenierias lndustriales y Civiles Universidad de Los Palmos de Cran Canafia35017 Los Palmos de Gran CanariaCanary IslandsSpain dept.lngenieria qufmica y Tecnologia del Medio Ambiente Universidad de Valladolid.47071 ValladolidSpain

The vapor-liquid equilibrium of binary mixtures of propyl acetate, butyl acetate and isobutyl acetate with meth- anol has been determined at a constant pressure of 0.6 MPa. Results have been modeled with the Peng-Robinson equation, a traditional cubic equation of state widely employed in chemical industries, as well as with the perturbed-chain statistical associating fluid PC-SAFT theory of Gross-Sadowski. By correlation of the binary inter- action parameters of these equations, the measured vapor-liquid equilibrium data can be accurately predicted. Thus, this work shows that these models are able to represent the experimental data for systems with associating comoounds via hydrogen bonding.

关键词： VLE isobaric data Propyl acetate Butyl acetate lsobutyl acetate MethanolEOS

Senarmontite volatilization kinetics in nitrogen atmosphere at roasting/melting temperatures

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2016年第1期26卷 294-300页

作者： A.ARACENA O.JERE C.ANTONUCCI escuela de ingenieria qufmica Pontificia Universidad Catoolica de ValparaisoGeneral Cruz 34ValparaisoChile Instituto de Geologia Econemica Aplicada(GEA) Universidad de ConcepcionCasilla 160-CConcepci6nChile

The volatilization kinetics of senarmontite（Sb_2O_3） was analyzed in a neutral atmosphere in two temperature ranges： 550-615 °C（roasting temperature） and 660-1100 °C（melting temperature） by using a thermogravimetric analysis method under various gas flow rates and using a 1.3 m L ceramic crucible（11 mm in internal diameter and 14 mm in height）. The effect of particle size was also analyzed. The experimental results of mass loss data, X-ray diffraction（XRD） analysis of partially reacted samples and thermodynamic studies indicate that the senarmontite becomes volatile in the form of Sb_4O_6（g） without the formation of any intermediary compound in the entire temperature range. At roasting temperatures, the volatilization kinetics of Sb_2O_3 was analyzed using the model X=kappt. The volatilization reaction was controlled by the surface chemical reaction and an activation energy value of 193.0 k J/mol was obtained in this temperature range. Based on the volatilization kinetics at the melting temperatures, for linear behaviour in nitrogen gas, kinetic constants were determined, and an activation energy of 73.9 k J/mol was calculated for the volatilization reaction with a surface area of 8.171×10^（-5）m^2.

关键词： senarmontite volatilization rate roasting temperature melting temperature kinetics