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Capillary hydrodynamic fractionation of hydrophobic colloids:Errors in the estimated particle size distribution

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Particuology 2014年第6期12卷 97-105页

作者： Luis A.Clementi Zohartze Artetxe Ziortza Aguirreurreta Amaia Agirre Jose r.Leiza Luis M.Gugliotta Jorge r.vega INTEC(CONICET and Universidad Nacional del Litoral) FrSF-UTN(Facultad regional Santa Fe-Universidad Tecnologica Nacional) POLYMAT Kimika Aplikatua SailaKimika Zientzien FakultateaUniversity of the Basque Country UPV/EHUJoxe Mari Korta Zentroa

Capillary hydrodynamic fractionation（CHDF） with turbidity detection at a single wavelength is an analytical technique that is often used for sizing the sub-micrometric particles of hydrophobic *** article investigates three sources of errors that affect the particle size distribution（PSD） estimated by CHDF：diameter calibration errors,uncertainties in the particle refractive index（PrI）,and instrumental broadening（IB）.The study is based on simulated and experimental examples that involve unimodal and bimodal *** errors in the diameter calibration curve can produce important deviations in the number average diameter due to systematic shifts suffered by the PSD *** uncertainties in the PrI are unimportant in the analysis of unimodal PSDs,but in the specific case of bimodal PSDs,errors in the PrI can strongly affect the estimated number concentration of each *** typical IB correction（based on the IB function estimated from narrow standards） produces slightly erroneous average diameters but can lead to PSDs with underestimated widths and distorted *** practice,the three investigated sources of errors can be present simultaneously,and uncertainties in the average diameters,the shape and width of the PSD,and the number concentration of the PSD modes are unavoidable.

关键词： Particle size distribution Capillary hydrodynamic fractionation Nanoparticle Particle refractive index Instrumental broadening

Isla San Pedro Nolasco as a Late Miocene intrusive record at the eastern margin of the Gulf of California:Insights from geological,geochemical and geochronological studies

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Geoscience Frontiers 2022年第3期13卷 100-114页

作者： L.A.Velderrain-rojas J.r.Vidal-Solano L.M.Alva-Valdivia r.vega-Granillo M.López-Martinez Departamento de Geología División de Ciencias Exactas y NaturalesUniversidad de SonoraC.P.83000 HermosilloSonoraMexico Laboratorio de Paleomagnetismo Instituto de GeofísicaUniversidad Nacional Autónoma de MéxicoCircuito de la Investigación CientíficaC.P.04510 MéxicoD.F.Mexico Departamento de Geología División de Ciencias de la TierraCentro de Investigación Científica y de Educación Superior de EnsenadaBaja CaliforniaMexico

Isla San Pedro Nolasco(ISPN)is a structural high bounded by inactive dextral oblique-slip faults in the east-central part of the Gulf of California rift zone and is composed of intrusive rocks not exposed on other Gulf of California *** we present the reconnaissance results from geological mapping,as well as first geochemical and geochronological data for the ISPN intrusive *** intrusive rocks compose a sheet-like body of intermediate and felsic composition intruded by an intermediate and acidic dike *** intrusive rocks(host and dikes)range in age from ca.9 Ma to 10 Ma(^(40)Ar/^(39)Ar)and show a hydrous ferromagnesian mineral association(amphibole and biotite)with a calc-alkalic and transitional *** hydrated mineralogical association has not been recognized in the coeval rocks along the onshore western margin of the North American plate(coastal Sonora).However,such hydrous mineralogical association is found in the coeval rift transitional volcanic rocks from the Baja California Microplate at Santa rosalía and Bahía de LosÁngeles–Bahía de LasÁ*** ISPN continental block,at least 40 km long,has been pulled apart by transtensional faulting of the late Miocene Gulf of California shear zone before the westward migration of the North America-Pacific plate boundary at ca.3–2 ***,ISPN became isolated as an island during the late Miocene flooding of the Gulf of California seaway.

关键词： PAC-NAM plate boundary Gulf of California Intrusive rocks Isla San Pedro Nolasco

In-hand manipulation of a circular dynamic object by soft fingertips without angle measurement

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Science China(Information Sciences) 2021年第5期64卷 193-208页

作者： r.GArCIA-rODrIGUEZ V.PArrA-vega Aeronautical Engineering Program and Postgraduate Program in Aerospacial Engineering Universidad Politecnica Metropolitana de Hidalgo robotics and Advanced Manufacturing Department Research Center for Advanced Studies (CINVESTAV)

A multi-fingered robotic hand with curved fingertips enables contact re-positioning without reattaching at the expense of fingertip rolling. This rolling stands for a characteristic that facilitates dexterous manipulation but results in an algebraically complex dynamic model subject to such constraints. The hemispherical shape of fingertips allows a dexterous manipulation when controlling the tangent forces, which are essential to rotate object. However, the measurement of the object angle in practice requires tactile-optical sensing. In this paper, considering robotic fingers with curved soft tips, we propose a feedback control that ensures optimal dynamical grasping of a circular rigid object. It is shown that the collaboration of the contact forces, to get a minimum pose of internal forces, and the tangential forces, to induce the conditions for assuring the grasp closure, is necessary to get a skillful manipulation. In this case, the orientation control of a circular object to the desired angle while avoiding direct measurement of the object angle is presented. Stability conditions of the system are presented in the sense of stability-in-the-manifold. Finally, representative simulations are shown and discussed.

关键词： optimal grasping manipulation soft-fingertips circular object stability-in-the-manifold

Online Demand response Characterization Based on Variability in Customer Behavior

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 936-946页

作者： Lester Marrero Daniel Sbárbaro Luis García-santander the Department of Electrical Engineering University of ConcepciónConcepción 4070409Chile

This paper proposes an online framework to characterize demand response(Dr)over *** proposed framework facilitates obtaining and updating the daily consumption patterns of *** essential concept of response profile class(rPC)is introduced for characterization and complemented by the measure of the variability in customer *** paper uses a modified version of the incremental clustering by fast search and find of density peaks(CFSFDP)algorithm for daily profiles,considering the multivariate normal kernel density estimator and incremental forms of the Davies-Bouldin(i DB)and Xie-Beni(i XB)validity *** studies conducted using real-world and simulated daily profiles of residential and commercial Chilean end-users have demonstrated how the proposed framework can continuously characterize *** proposed framework is proven to achieve realistic customer models for effective energy management by estimating the customer response to price signals at the distribution system operator(DSO)level.

关键词： Demand response(Dr) incremental indice online characterization online clustering response profile class(rPC)

Machine Learning Techniques in Predicting Hot Deformation Behavior of Metallic Materials

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 713-732页

作者： Petr Opela Josef Walek Jaromír Kopecek Department of Metallurgical Technologies Faculty of Materials Science and TechnologyVSB–Technical University of OstravaOstrava70800Czech Republic FZU—Institute of Physics of the Czech Academy of Sciences Prague18200Czech Republic

In engineering practice,it is often necessary to determine functional relationships between dependent and independent *** relationships can be highly nonlinear,and classical regression approaches cannot always provide sufficiently reliable ***,Machine Learning(ML)techniques,which offer advanced regression tools to address complicated engineering issues,have been developed and widely *** study investigates the selected ML techniques to evaluate their suitability for application in the hot deformation behavior of metallic *** ML-based regression methods of Artificial Neural Networks(ANNs),Support Vector Machine(SVM),Decision Tree regression(DTr),and Gaussian Process regression(GPr)are applied to mathematically describe hot flow stress curve datasets acquired experimentally for a medium-carbon *** the GPr method has not been used for such a regression task before,the results showed that its performance is the most favorable and practically unrivaled;neither the ANN method nor the other studied ML techniques provide such precise results of the solved regression analysis.

关键词： Machine learning Gaussian process regression artificial neural networks support vector machine hot deformation behavior

Analysis of temperature distribution in PV-integrated electrochemical flow cells

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Materials Futures

Materials Futures 2023年第4期2卷 137-144页

作者： Dorian santander Shaun Whitley Jungmyung Kim Dowon Bae Institute of Mechanical Process and Energy Engineering(IMPEE)School of Engineering and Physical SciencesHeriot-Watt UniversityEdinburgh EH144ASUnited Kingdom Ecole nationale supérieure d’électricitéet de mécanique de Nancy Vandoeuvre-lès-NancyFrance AECOM EdinburghEH35DAUnitedKingdom

Photovoltaic(PV)-integrated flow cells for electrochemical energy conversion and storage underwent a huge *** advantages of this type of integrated flow cell system include the simultaneous storage of solar energy into chemicals that can be readily utilized for generating ***,most studies overlook the practical challenges arising from the inherent heat exposure and consequent overheating of the reactor under the *** work aims to predict the temperature profiles across PV-integrated electrochemical flow cells under light exposure conditions by introducing a computational fluid dynamics–based ***,we discuss the effects of the flow channel block architecture on the temperature profile to provide insights and guidelines for the effective remedy of overheating.

关键词： solar redox flow battery CFD redox flow cell energy conversion temperature profile

Comment:Comments on “How to repair the Hill cipher”

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第2期9卷 211-214页

作者： Y.rANGEL-rOMErO r.vega-GArCíA A.MENCHACA-MéNDEZ D.ACOLTZI-CErVANTES L.MArTíNEZ-rAMOS M.MECATE-ZAMBrANO F.MONTALVO-LEZAMA J.BArróN-VIDALES N.COrTEZ-DUArTE F.rODríGUEZ-HENríQUEZ Computer Science Department CINVESTAV-IPN Av.IPN No. 2508 Col. San Pedro Zacatenco Mexico City 07300 Mexico

A modification of the Hill cipher algorithm was recently proposed by Ismail et al.(2006),who claimed that their new scheme could offer more security than the original one due to an extra non-linearity layer introduced via an elaborated key gen-eration *** mechanism produces one different encryption key for each one of the plaintext ***,we show in this paper that their method still has severe security flaws whose weaknesses are essentially the same as that already found in the original Hill cipher scheme.

关键词： Hill cipher Symmetric encryption Image encryption

Destabilization of bitumen-coated fine solids in oil through water-assisted flocculation using biomolecules extracted from guar beans

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Petroleum Science 2020年第6期17卷 1726-1736页

作者： Camila santander Jing Liu Xiaoli Tan Qi Liu Hongbo Zeng Department of Chemical and Materials Engineering University of AlbertaEdmontonAB T6G 1H9Canada

Non-aqueous extraction(NAE)of bitumen from oil sands has been gaining great attention from both the industry and academia as an alternative to the water-based extraction.A fine solids removal step is important for a NAE process in order to obtain high-quality bitumen product,which,however,remains a great challenge to reduce the fine solids content to the desired ***,we introduce a strategy of destabilizing the bitumen-coated silica particles in toluene with the addition of water and biomolecules extracted from Cyamopsiste tragonolobuosr ***.,i.e.,high molecular weight guar gum(HGG)and low molecular weight guar gum(LGG),*** virtue of sedimentation tests and focused beam reflectance measurement analysis,we demonstrate that the introduced water droplets modified with these biomolecules can facilitate the settling of the solid particles in toluene although the underlying mechanisms differ between these two biomolecule ***,in the case of LGG,the added water droplets with the interfacial amphiphilic LGG can strengthen the attachment of solid particles from bulk toluene to the LGG *** research work provides useful insight into the development of effective approaches for destabilization and removal of bitumen-coated fine solids from NAE bitumen.

关键词： Non-aqueous extraction Guar gum Fine solids Aggregates Solid content Chord length

Emerging potential of progranulin-dependent SorCS2 signaling in healthy and diseased nervous systems

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Neural regeneration research 2025年第9期20卷 2591-2593页

作者： Alena Salasova Anders Nykjær Danish research Institute of Translational Neuroscience DANDrITE-Nordic EMBL Partnership for Molecular Medicine and Centre of Excellence PROMEMODepartment of BiomedicineAarhus UniversityAarhusDenmark

The formation of the mammalian nervous system and its maturation into sensory,motor,cognitive,and behavioral circuits is a complex process that begins during early embryogenesis and lasts until young *** neurodevelopm... 详细信息

关键词： progr jointly CS2