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Using Neural Networks for Simulating and Predicting Core-End Temperatures in Electrical Generators: Power Uprate Application

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World journal of Engineering and Technology 2015年第1期3卷 1-14页

作者： Carlos j. Gavilán moreno Cofrentes Nuclear Power Plant Iberdrola Generaci&oacute n Nuclear Valencia Spain

Power uprates pose a threat to electrical generators due to possible parasite effects that can develop potential failure sources with catastrophic consequences in most cases. In that sense, it is important to pay close attention to overheating, which results from excessive system losses and cooling system inefficiency. The end region of a stator is the most sensitive part to overheating. The calculation of magnetic fields, the evaluation of eddy-current losses and the determination of loss-derived temperature increases, are challenging problems requiring the use of simulation methods. The most usual methodology is the finite element method, or linear regression. In order to address this methodology, a calculation method was developed to determine temperature increases in the last stator package. The mathematical model developed was based on an artificial intelligence technique, more specifically neural networks. The model was successfully applied to estimate temperatures associated to 108% power and used to extrapolate temperature values for a power uprate to 113.48%. This last scenario was also useful to test extrapolation accuracy. The method is applied to determine core-end temperature when power is uprated to 117.78%. At that point, the temperature value will be compared to with the values obtained using finite elements method and multivariate regression.

关键词： Neural Network Error Temperature Core-End Generator Power Uprate

Association between urinary concentrations of bisphenol A substitutes and diabetes in adults

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World journal of Diabetes 2022年第7期13卷 521-531页

作者： Rafael moreno-Gómez-Toledano Esperanza Vélez-Vélez María I Arenas Marta Saura Ricardo j Bosch Universidad de Alcalá Department of Biological Systems/Physiology UnitAlcaláde Henares 28871Spain Fundación jiménez Díaz School of Nursing Jiménez Díaz FoundationAutonomous University of MadridMadrid 28040Spain Universidad de Alcalá Department of Biomedicine and BiotechnologyAlcaláde Henares 28871Spain Centro de Investigación en Red de Enfermedades Cardiovasculares Instituto Ramón y Cajal de Investigación SanitariaMadrid 28034Spain

BACKGROUND Due to new restrictions on the use of bisphenol A(BPA),industries are beginning to replace it with derived molecules such as bisphenol S and F(BPS and BPF).There is extensive evidence in the academic literature on the potential health effects of BPA,which is known to be a diabetogenic ***,there are few publications related to new compounds derived from *** To perform an epidemiological study of urinary BPS and BPF in the American National Health and Nutrition Examination Survey(NHANES)cohort,and analyze their possible relationship with diabetes *** NHANES datasets from 2013 to 2016 were used due to the urinary BPF and BPS *** from 3658 adults were analyzed to perform regression analysis exploring the possible relationship between BPA-derived compounds and *** Descriptive statistics,linear regression modeling,and logistic regression analysis revealed a significant relationship between urinary BPS,but not BPF,and diabetes ***,a relationship was observed between both compounds and hypertension and a slight relationship between BPF and *** In the present study,a strong relationship between urinary BPS,not BPF,and diabetes risk has been *** substitute molecules do not exempt the population from potential health risks.

关键词： Bisphenol S Bisphenol F Diabetes mellitus National Health and Nutrition Examination Survey Urine

Distribution of snow depth variability

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Frontiers of Earth Science 2018年第4期12卷 683-692页

作者： S.R.FASSNACHT K.S.j.BROWN E.j.BLUMBERG j.I.LOPEZ moreno T.P.COVINO M.KAPPAS Y.HUANG V.LEONE A.H.KASHIPAZHA ESS-Watershed Science Colorado State UniversityFort CollinsCO 80523-1476USA Cooperative Institute for Research in the Atmosphere Fort CollinsCO 80523-1375USA Natural Resources Ecology Laboratory Fort CollinsCO 80523-1499USA Geographisches Institut Georg-August-Universitat Gottingen37077GottingenDeutschland Geosciences Colorado State UniversityFort CollinsCO 80523-1482USA Instituto Pirenaico de Ecologia CSICCampus de Aula Dei50080ZaragozaEspana State Key Laboratory of Flydroscience and Engineering Tsinghua UniversityBeijing 100084China Seconda Universita degli Studi di Napoli Viale Abramo Lincoln581100Caserta CEItalia

Snow depth is the easiest snowpack property to measure in the field and is used to estimate the distribution of snow for quantifying snow storage. Often the mean of three snow depth measurements is used to represent snow depth at a location. This location is used as a proxy for an area, typically a digital elevation model (DEM) or remotely sensed pixel. Here, 11, 17, or 21 snow depth measurements were used to represent the mean snow depth of a 30-m DEM pixel. Using the center snow depth measurement for each sampling set was not adequate to represent the pixel mean, and while the use of three snow depth measurements improved the estimate of mean, there is still large error for some pixels. These measurements were then used to determine the variability of snow depth across a pixel. Estimating variability from few points rather than all in a measurement was not sufficient. The sampling size was increased from one to the total per pixel (11, 17, or 21) to determine how many point samples were necessary to approximate the mean snow depth per pixel within five percent. Binary regression trees were constructed to determine which terrain and canopy variables dictated the spatial distribution of the snow depth, the standard deviation of snow depth, and the sample size to within 5% of the mean per pixel. One location was measured in two years just prior to peak accumulation, and it is shown that there was little to no inter-annual consistency in the mean or standard deviation.

关键词： uncertainty sampling binary regression trees snow telemetry

Generalized algorithms for particle motion and collision with streambeds

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International journal of Sediment Research 2019年第4期34卷 295-306页

作者： Patricio A.moreno-Casas Fabián A.Bombardelli juan Pablo Toro Department of Civil and Environmental Engineering University of CaliforniaDavis Facultad de Ingeniería y Ciencias Aplicadas Universidad de los AndesMonse?or Alvaro del Portillo Department of Civil Engineering Universidad Andres Bello

Recent theoretical and numerical models for the motion of saltating particles close to stream beds are constituted of three sub-models: a) a set of equations describing the particle "free flight", b) a sub-model to calculate the post-collision particle velocity, and c) a mathematical representation of the bed roughness. In this paper, a comprehensive three-dimensional(3-D), theoretical/numerical model for bedload motion at large Reynolds numbers is presented. By using geometric considerations and stochastic parameters to characterize collisions with the wall, five new sub-models for representation of bed roughness are, for the first time to the best of our knowledge, proposed and implemented. The emphasis of this paper is on the particle model, for which Basset, Magnus, drag, submerged weight, virtual mass,and lift forces are included. For the range of particle sizes(sands) analyzed herein, it is found that the stream-wise contribution of the Basset force, compared to other forces, may be as large as 60%. Whereas in the wall-normal direction, the Basset force is equally important as the drag force, and it is exceeded only by the submerged weight. It is also found that the best agreement between numerical and experimental results in terms of jump length, jump height, and stream-wise particle velocity is achieved for restitution and friction coefficients of 0.65 and 0.1, respectively. Important conclusions are obtained regarding the lack of realistic prediction with available "roughness" models with small ranges of angles.

关键词： Particle saltation Particle collision Particle rotation Bed-load transport Basset force

Macular atrophy after combined intravitreal triamcinolone and photodynamic therapy to treat choroidal neovascularization

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International journal of Ophthalmology(English edition) 2010年第2期3卷 161-163页

作者： jose M Ruiz-moreno javier A Montero Pedro Amat Francisco Lugo Department of Ophthalmology Albacete Medical SchoolUniversity of Castilla La ManchaSpain Alicante Institute of Ophthalmology Vitreo-Retinal Unit.Spain Pio del Rio Hortega University Hospital Ophthalmology UnitValladolidSpain

AIMTo report the appearance of choriocapillaris atrophy after combined high dose intravitreal triamcinolone acetonide (TA) and photodynamic therapy (PDT) to treat choroidal neovascularization (CNV) associated with age... 详细信息

关键词： age related macular degeneration choriocapillaris atrophy intravitreous triamcinolone photodynamic therapy retinal pigment epithelium atrophy

Adsorption of pharmaceutical pollutants on ZnCl_(2)-activated biochar from corn cob:Efficiency,selectivity and mechanism

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journal of Bioresources and Bioproducts 2024年第1期9卷 58-73页

作者： Christian F.Varela L.C.moreno-Aldana Yazmin Yaneth Agámez-Pertuz Department of Chemistry National University of ColombiaAv.Carrera 30 No.45-03BogotáD.C.Colombia Department of Biology and Chemistry University of the Llanoskm 12 road to Puerto LópezVillavicencioColombia

The occurrence of pharmaceuticals in water bodies and drinking water poses risks for the envi-ronment and human health,thus it is necessary to study methodologies that allow the efficient removal of these *** this work,corn cob-derived biochar was obtained by ZnCl_(2)-activation,and subsequent carbonization at 700℃.The effect of contact time,temperature,pH,and initial concentration on the adsorption capacity of acetaminophen(ACE)and amoxicillin(AMX)was determined through batch *** addition,the kinetics,isotherms,and ther-modynamics parameters were *** activated biochar exhibited a maximum adsorp-tion capacity of 332.08 mg/g for ACE and 175.86 mg/g for *** adsorption kinetics and adsorption isotherm of ACE corresponded to the pseudo-second order and Langmuir model,***,pseudo-first-order kinetics and the Freundlich isotherm model were well-fitted to AMX *** ACE and AMX co-adsorption had a synergistic effect on AMX but an antagonistic effect on ACE removal,achieving a maximum adsorption capacity of 193.51 and 184.58 mg/g,*** the other hand,fixed-bed column experiments showed that the adsorption capacity depends on the influent concentration,and the breakthrough curve fits the Thomas and Yoon-Nelson *** mechanism adsorption studies showed that surface inter-actions(hydrogen bonding formation and n-𝜋interactions)are the main driving forces for the adsorption process,and pore filling is the rate-limiting *** this way,the prepared biochar exhibits a high potential for the adsorption of pharmaceutical compounds from water.

关键词： Biochar Adsorption Acetaminophen Amoxicillin Wastewater treatment

Tracking the phase transformation and microstructural evolution of Sn anode using operando synchrotron X-ray energy-dispersive diffraction and X-ray tomography

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journal of Energy Chemistry 2023年第1期76卷 429-437,I0011页

作者： Kang Dong Fu Sun Andre Hilger Paul H.Kamm Markus Osenberg Francisco Garcia-moreno Ingo Manke Institute of Applied Materials Helmholtz-Zentrum Berlin fur Materialien und EnergieHahn-Meitner-Platz 1Berlin 14109Germany Institute of Materials Science and Technology Technische Universitat BerlinHardenbergstraβe 36Berlin 10623Germany Qingdao Institute of BioEnergy and Bioprocess Technology Chinese Academy of Sciences189 Songling RoadQingdao 266101ShandongChina

Tin(Sn)holds great promise as an anode material for next-generation lithium(Li)ion batteries but suffers from massive volume change and poor cycling *** clarify the dynamic chemical and microstructural evolution of Sn anode during lithiation and delithiation,synchrotron X-ray energydispersive diffraction and X-ray tomography are simultaneously employed during Li/Sn cell *** intermediate Li-Sn alloy phases during de/lithiation are identified,and their dynamic phase transformation is unraveled which is further correlated with the volume variation of the Sn at particle-and ***,we find that the Sn particle expansion/shrinkage induced particle displacement is anisotropic:the displacement perpendicular to the electrode surface(z-axis)is more pronounced compared to the directions(x-and y-axis)along the electrode *** anisotropic particle displacement leads to an anisotropic volume variation at the electrode level and eventually generates a net electrode expansion towards the separator after cycling,which could be one of the root causes of mechanical detachment and delamination of electrodes during long-term *** unraveled chemical evolution of Li-Sn and deep insights into the microstructural evolution of Sn anode provided here could guide future design and engineering of Sn and other alloy anodes for high energy density Li-and Na-ion batteries.

关键词： Sn anode Li-Sn phase transformation X-ray tomography Operando X-ray diffraction Anisotropic displacement Digital volume correlation(DVC)

Spatio-temporal snowmelt variability across the headwaters of the Southern Rocky Mountains

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Frontiers of Earth Science 2017年第3期11卷 505-514页

作者： S.R. FASSNACHT j.I. LOPEZ-moreno C. MA A.N. WEBER A.K.D. PFOHL S.K. KAMPF M. KAPPAS ESS-Watershed Science Colorado State University Fort Collins CO 80523-1476 USA Cooperative Institute for Research in the Atmosphere Fort Collins CO 80523-1375 USA Geospatial Centroid at CSU Fort Collins CO 80523-1019 USA Natural Resources Ecology Laboratory Fort Collins CO 80523-1499 USA Geographisches Institut Georg-August-Universitat Gottingen 37077 Gottingen Germany Instituto Pirenaico de Ecologia CSIC Campus de Aula Dei 50080 Zaragoza Spain EASC-Watershed Science Colorado State University Fort Collins CO 80523-1482 USA

Understanding the rate of snowmelt helps inform how water stored as snow will transform into streamflow. Data from 87 snow telemetry （SNOTEL） stations across the Southern Rocky Mountains were used to estimate spatio-temporal melt factors. Decreases in snow water equivalent were correlated to temperature at these monitoring stations for eight half-month periods from early March through late june. Time explained 70% of the variance in the computed snow melt factors. A residual linear correlation model was used to explain subsequent spatial variability. Longitude, slope, and land cover type explained further variance. For evergreen trees, canopy density was relevant to find enhanced melt rates; while for all other land cover types, denoted as non- evergreen, lower melt rates were found at high elevation, high latitude and north facing slopes, denoting that in cold environments melting is less effective than in milder sites. A change in the temperature sensor about mid-way through the time series （1990 to 2013） created a discontinuity in the temperature dataset. An adjustment to the time series yield larger computed melt factors.

关键词： melt SWE temperatutre SNOTEL tempera-ture sensor change

Quantification of corneal neovascularization after ex vivo limbal epithelial stem cell therapy

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International journal of Ophthalmology(English edition) 2014年第6期7卷 988-995页

作者： Adriano Guarnieri javier moreno-Monta?és Belén Alfonso-Bartolozzi Alfonso L.Sabater María García-Guzmán Enrique j.Andreu Felipe Prosper Department of Ophthalmology Clínica Universidad de Navarra Department of Cell Therapy Clínica Universidad de Navarra

AIM: To assess cultured limbal epithelial stem cell transplantation in patients with limbal stem cell deficiency by analyzing and quantifying corneal ***: This retrospective, interventional case series included eight eyes with total limbal stem cell deficiency. Ex vivo limbal epithelial stem cells were cultured on human amniotic membrane using an animalfree culture method. The clinical parameters of limbal stem cell deficiency, impression cytology, and quantification of corneal neovascularization were evaluated before and after cultured limbal stem cell transplantation. The area of corneal neovascularization,vessel caliber(VC), and invasive area(IA) were analyzed before and after stem cell transplantation by image analysis software. Best-corrected visual acuity(BCVA),epithelial transparency, and impression cytology were also ***: One year after surgery, successful cases showed a reduction(improvement) of all three parameters of corneal neovascularization [neovascular area(NA), VC, IA], while failed cases did not. NA decreased a mean of 32.31%(P =0.035), invasion area29.37%(P =0.018) and VC 14.29%(P =0.072). BCVA improved in all eyes(mean follow-up, 76 ±21mo).Epithelial transparency improved significantly from 2.00 ±0.93 to 0.88±1.25(P =0.014). Impression cytology showed that three cases failed after limbal epithelial stem cell therapy before 1y of ***: This method of analyzing andmonitoring surface vessels is useful for evaluating the epithelial status during follow-up, as successful cases showed a bigger reduction in corneal neovascularization parameters than failed cases. Using this method,successful cases could be differentiated from failed cases.

关键词： limbal stem cell corneal neovascularization stem cell therapy impression cytology limbal stem cell deficiency