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Novel Fast Operating Moving Coil Actuator with Compensation Coil for HvDC Circuit Breakers

ⅩⅪ International Grassland Congress and the Ⅷ International Rangeland Congress

作者： O.A.Castelan-Ortega J.G.Estrada-Flores A.M.J.Espinoza-Ortega E.Sanchez-vera M.Hernandez-Ortega M.A.Rojas-Garduno v.ambriz-vilchis Centra de Investigation en Ciencias Agropecuarias.Universidad Autonoma del Estado de Mexico.Instituto Literario

＜正＞Introduction Simulation models are useful tools in field research,technology transfer and decision making process（Ahuja and Howell 2002）.The use of simulation models facilitate the development of feeding systems for dairy cattle,based on strategies that fulfils the metabolizable protein and energy requirements of cattle,therefore the Buttercup simulation model was *** aim of this work was to develop a methodological frame for the formulation of feeding strategies for dairy cattle in small scale dairy farming systems through calibration and the on farm validation of the model.

关键词： small scale dairy farming system feeding strategies simulation model

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CSEE Journal of Power and Energy Systems 2021年第5期7卷 1041-1050页

作者： Boyuan Yin Xianwu Zeng John F.Eastham Damian vilchis-Rodriguez Xiaoze Pei Department of Electronic&Electrical Engineering.University of Bath.Bath.United Kingdom Department of Mechanical Engineering University of Bath.Bath.United Kingdom. Power and Energy Division School of Electrical and Electronic EngineeringThe University of ManchesterManchester M139PLUnited Kingdom.

DC circuit breakers are major enabling components for multi-terminal HvDC *** key design targets are operating speed and *** paper proposes a novel moving coil actuator using a compensation coil topology to operate mechanical circuit *** topology aims to significantly improve the magnetic field saturation and reduce the system inductance,so that the operating speed is *** possible connection methods for the compensation coils are proposed and analyzed using finite element modeling,ensuing simulation results are compared and *** operating speed of the moving coil actuator with compensation coils is significantly improved compared with the original moving coil *** moving coil actuator with compensation coils can open a distance of 5 mm within 2.8 ms and the peak efficiency is 47%.

关键词： Compensation coil DC circuit breaker HvDC mechanical circuit breaker moving coil actuator

Functional responses of cougars(Puma concolor)in a multiple prey-species system

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Integrative Zoology 2018年第1期13卷 84-93页

作者： Leroy SORIA-DÍAZ Mike SFOWLER Octavio MONROY-vilchis Daniel ORO Institute of Applied Ecology Autonomous University of TamaulipasVictoria city TamaulipasMexico Department of Biosciences Swansea UniversitySwanseaUK Center for Research in Applied Biological Sciences Autonomous University of the State of MexicoCentro TolucaMexico Population Ecology Group Mediterranean Institute for Advanced Studies IMEDEA(CSIC-UIB)EsporlesMallorcaSpain

The study of predator-prey interactions is commonly analyzed using functional responses to gain an understanding of predation patterns and the impact they have on prey *** this,little is known about predator-prey systems with multiple prey species in sites near the *** we studied the functional response of cougars(Puma concolor)in relation to their main prey,armadillo(Dasypus novemcinctus),coati(Nasua narica)and white-tailed deer(Odocoileus virginianus).Between 2004 and 2010,cougar scats were collected along 5 transects to estimate the consumption of different prey species.A relative abundance index(RAI)was calculated for each prey species and cougar using 18 camera *** compared Holling type I,II and III functional response models to determine patterns in prey consumption based on the relative abundance and biomass of each prey species *** 3 main prey species comprised 55%(armadillo),17%(coati)and 8%(white-tailed deer)of the *** I and II functional responses described consumption of the 2 most common prey species armadillos and coati similarly well,while a type I response best characterized consumption of white-tailed deer.A negative correlation between the proportions of armadillo versus coati and white-tailed deer biomass in cougar scats suggests switching to consume alternative prey,confirming high foraging plasticity of this *** work represents one of the few studies to compare functional responses across multiple prey species,combined with evidence for prey-switching at low densities of preferred prey.

关键词： cougar functional responses Holling model comparison multiple prey

On Boolean Lattices of Module Classes

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Algebra Colloquium 2018年第2期25卷 285-294页

作者： Alejandro Alvarado-Garcia Cesar Cejudo-Castilla Hugo Alberto Rincon-Mejia Ivan Fernando vilchis-Montalvo Manuel Gerardo Zorrilla-Noriega Facultad de Ciencias Universidad Nacional Autonoma de Mexico Circuito Exterior C.U. C.P. 04510 Ciudad de Mexico Mexico Facultad de Ciencias Fisico Matemdticas Benemerita Universidad Autonoma de Puebla Av. San Claudio y 18 Sur Col. San Manuel Ciudad Universitaria C.P. 72570 Puebla Mexico Facultad de Ciencias Universidad Nacional Autonoma de Mexico Circuito Exterior C.U. C.P. 04510 Ciudad de Mdxico Mdxico Facultad de Ciencias Ffsico Matematicas Benemerita Universidad Autonoma de Puebla Av. San Claudio y 18 Sur Coi. San Manuel Ciudad Universitaria C.P. 72570 Puebla Mexico

Some properties of and relations between several （big） lattices of module classes are used in this paper to obtain information about the ring over which modules are taken. The authors reach characterizations of triv... 详细信息

关键词： torsion theories hereditary pretorsion classes natural classes conaturalclasses boolean lattice

Synthesis,characterization and antibacterial activity of copper,nickel and bimetallic Cu–Ni nanoparticles for potential use in dental materials

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Progress in Natural Science:Materials International 2014年第4期24卷 321-328页

作者： Liliana Argueta-Figueroa Raúl A.Morales-Luckie Rogelio J.Scougall-vilchis Oscar F.Olea-Mejía School of Medicine Autonomous University State of Mexico (UAEMex)Mexico Department of Materials Science Center for Research in Sustainable Chemistry (CIQS)Autonomous University State of Mexico (UAEMex)Km 14.5Carr.Toluca-AtlacomulcoZC 50200Toluca CityState of MexicoMexico Dental Research Center (CIEAO) Autonomous University State of Mexico (UAEMex)Mexico

The antibacterial effect is a desirable property in dental *** of simple methods for the preparation of nanosized metal particles has attracted significant attention because of their future applications due to unusual size-dependent antibacterial ***(Cu),Nickel(Ni) and bimetallic Cu–Ni nanoparticles were prepared by a simple chemical method and their antibacterial activity was tested against the widely used standard human pathogens Staphylococcus aureus(gram-negative) and Escherichia coli(gram-positive).Additionally,these nanoparticles were tested against the dental pathogen Streptococcus *** results are promising for potential use in dental materials science.

关键词： Antibacterial properties Metal nanoparticles Copper nanoparticles Nickel nanoparticles Nano-alloy

Coyote(Canis latrans)in South America:potential routes of colonization

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Integrative Zoology 2020年第6期15卷 471-481页

作者： Octavio MONROY-vilchis JoséF.GONZÁLEZ-MAYA Ángel BALBUENA-SERRANO Fausto ELvIR Martha M.ZARCO-GONZÁLEZ Clarita RODRÍGUEZ-SOTO Centro de Investigación en Ciencias Biológicas Aplicadas Universidad Autónoma del Estado de MéxicoInstituto Literario 100TolucaMéxico50000México Instituto de Ecología Universidad Nacional Autónoma de MéxicoCoyoacánMéxico The Sierra to Sea Institute and ProCAT Colombia Las AlturasCoto BrusPuntarenasCosta Rica Fundación Investigación en Ciencias para el Estudio y Conservación de la Biodiversidad Instituto de Ciencia para el Estudio y Conservación de la Biodiversidadfrente a la Escuela República de JapónTegucigalpaHonduras Facultad de Geografía Universidad Autónoma del Estado de MéxicoInstituto Literario 100TolucaMéxico50000México

During the last century,the coyote(Canis latrans)has increased its distribution in Central *** the 1980s,it had not been recorded in *** records show that coyotes have crossed the Panama Canal,indicating that continues to expand;therefore,there is a possibility that it will reach northern South *** objectives were to identify potential coyote colonization routes to South America,and the variables that favor its *** hypothesized that habitat fragmentation benefits coyote *** applied 7 algorithms to model the potential distribution of the coyote,using 196 presence records and 12 *** models with better performance were used to generate a consensus *** our consensus model and the areas with highest probability of presence,a potential colonization route was generated between Central America and northern South *** route lies through southern Costa Rica,along the Pacific coast of Panama to the south,to the Andean mountains in northern *** variables that explained potential coyote distribution were human population density,altitude,and percentage of crops with positive influence,and tropical broadleaf forests with negative *** results indicate that human activities and deforestation are related to coyote distribution *** can be implemented within the identified route to improve environmental management,in order to avoid the presence of the coyote in the ecosystems of northern South America.

关键词： Canis latrans carnivore distribution expansion invasive management species distribution model

绿色创新对企业绩效的影响 ——来自中国和墨西哥制造业的研究比较

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绿色创新对企业绩效的影响 ——来自中国和墨西哥制造业的研究比较

作者： Denisse Alvarez vilchis 大连理工大学

学位级别：硕士

墨西哥和中国都是制造业发达的发展中国家,同时也是世界上环境污染严重的国家。为了解决环境污染问题,中国和墨西哥都要求相关企业对生产过程和产品进行绿色创新,但是企业普遍担心这是否会为他们带来财务和环境绩效。本文旨在研究绿色... 详细信息

墨西哥和中国都是制造业发达的发展中国家,同时也是世界上环境污染严重的国家。为了解决环境污染问题,中国和墨西哥都要求相关企业对生产过程和产品进行绿色创新,但是企业普遍担心这是否会为他们带来财务和环境绩效。本文旨在研究绿色创新活动对制造业企业绩效的影响。本文通过分析企业的绿色过程创新以及绿色产品创新来测量企业的绿色创新,企业绩效则使用财务绩效和环境绩效两个变量来评估。本研究的调查问卷发给了中国和墨西哥的企业,以此研究绿色创新和企业绩效之间的关系。利用相关分析和回归分析方法分别对中国和墨西哥的调查数据进行处理分析。结果显示,中国和墨西哥的绿色创新都对制造业企业的环境绩效和财务绩效都有正向影响。进一步,在墨西哥,绿色过程创新对制造业企业绩效的影响更显著,而在中国,绿色产品创新对制造业企业绩效的影响则更显著。最后,对两个国家的不同结果进行了对比分析,发现每个国家注重不同的因素,分别促成了绿色产品创新或绿色过程创新的成功。本研究在管理方面的意义是,绿色创新对制造业企业绩效的影响取决于企业所在国家的不同。来自某些国家的企业更加注重产品创新,而来自其他一些国家的企业更加注重过程创新,正如本文所研究的中国和墨西哥。因此,制造业企业为了实现企业绩效,在管理上应当同时关注绿色过程和绿色产品创新。

关键词：财务绩效环境绩效绿色创新绿色产品创新绿色过程创新

Hydrothermal synthesis of pyrrhotite(Fex-1S) nanoplates and their antibacterial, cytotoxic activity study

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Progress in Natural Science:Materials International 2018年第4期28卷 447-455页

作者： Liliana Argueta-Figueroa Nayely Torres-Gómez René García-Contreras A.R.vilchis-Nestor O.Martínez-Alvarez L.S.Acosta-Torres M.C.Arenas-Arrocena Laboratorio de Investigación Interdisciplinaria área de Nanoestructuras y Biomateriales Escuela Nacional de Estudios Superiores Unidad León Universidad Nacional Autónoma de México Centro Conjunto de Investigación en Química Sustentable (CCIQS) UEAMex-UNAM Departamento de Ingeniería en Energía Universidad Politécnica de Guanajuato

The aim of this study was to synthesize and characterize Fex-1S 2D-nanostructures with pyrrhotite phase,as well as to explore their biological(antibacterial and cytotoxic)properties,namely the expression of reactive oxygen species(ROS)in the exposure of cells and *** on hydrothermal synthesis,the characterization of asprepared 2D-nanostructures was performed by XRD,SEM,EDS,and TEM,in which the single-crystalline pyrrhotite phased Fex-1S nanoplate morphology was *** antibacterial activities of Fex-1S nanoplates against human pathogenic strains such as Staphylococcus aureus,Escherichia coli,and Enterococcus faecalis were *** inhibitory concentration(MIC)and minimum bactericidal concentration(MBC)were determined following the broth microdilution *** and expression of intracellular ROS of pyrrhotite nanoplates on Human Gingival Fibroblast(HGF),Human Pulp Cells(HPC)and Human Osteoblast(HBC)were *** viability was determined by the MTT *** experiments were performed of three independent experiments and data were analyzed by Kruskal-Wallis and Mann-Whitney tests,also Pearson′s Correlation was *** nanoplates exhibited good bactericidal *** types of cells tested showed slight *** was found that intracellular ROS is produced when cells and bacteria tested are exposed to pyrrhotite nanoplates in presence of both air and peroxide *** production levels were higher in the bacteria than the cells exposed to these nanoplates.

关键词： Hydrothermal synthesis Iron sulfide nanoplates Minimal inhibitory concentration Antibacterial effect Cytotoxicity assay

Function, kinetic properties, crystallization, and regulation of microbial malate dehydrogenase

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2016年第4期17卷 247-261页

作者： Toshiko TAKAHASHI-INIGUEZ Nelly ABURTO-RODRIGUEZ Ana Laura vilchis-GONZALEZ Maria Elena FLORES Departamento de Biologla Molecular y Biotecnologia lnstituto de Investigaciones BiomddicasUniversidad Nacional Autonoma de MexicoMexicoD.F.04510Mexico

Malate dehydrogenase （MDH） is an enzyme widely distributed among living organisms and is a key protein in the central oxidative pathway. It catalyzes the interconversion between malate and oxaloacetate using NAD＋ or NADP＊ as a cofactor. Surprisingly, this enzyme has been extensively studied in eukaryotes but there are few reports about this enzyme in prokaryotes. It is necessary to review the relevant information to gain a better understanding of the function of this enzyme. Our review of the data generated from studies in bacteria shows much diversity in their molecular properties, including weight, oligomeric states, cofactor and substrate binding affinities, as well as differences in the direction of the enzymatic reaction. Furthermore, due to the importance of its function, the transcription and activity of this enzyme are rigorously regulated. Crystal structures of MDH from different bacterial sources led to the identification of the regions involved in substrate and cofactor binding and the residues important for the dimer-dimer interface. This structural information allows one to make direct modifications to improve the enzyme catalysis by increasing its activity, cofactor binding capacity, substrate specificity, and thermostability. A comparative analysis of the phylogenetic reconstruction of MDH reveals interesting facts about its evolutionary history, dividing this superfamily of proteins into two principle clades and establishing relationships between MDHs from different cellular compartments from archaea, bacteria, and eukaryotes.

关键词： Malate dehydrogenase Carbon metabolism Tricarboxylic acid cycle

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Neuroprotective effect of immunomodulatory peptides in rats with traumatic spinal cord injury

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Neural Regeneration Research 2021年第7期16卷 1273-1280页

作者： Dulce Parra-villamar Liliana Blancas-Espinoza Elisa Garcia-vences Juan Herrera-García Adrian Flores-Romero Alberto Toscano-Zapien Jonathan vilchis villa Rodríguez Barrera-Roxana Soria Zavala Karla Antonio Ibarra Raúl Silva-García Unidad de Investigación Médica en Inmunología Hospital de PediatríaCentro Médico Nacional Siglo XXI/Instituto Mexicano del Seguro Social/Ciudad de MéxicoMéxico Centro de Investigación en Ciencias de la Salud(CICSA) Facultad de Ciencias de la SaludUniversidad Anáhuac MéxicoCampus NorteHuixquilucanEdo de MéxicoMéxico Centro de Investigación del Proyecto Camina A.C Ciudad de MéxicoMéxico

Several therapies have shown obvious effects on structural conservation contributing to motor functional recovery after spinal cord injury(SCI).Nevertheless, neither strategy has achieved a convincing *** purposed a combined therapy of immunomodulatory peptides that individually have shown significant effects on motor functional recovery in rats with *** objective of this study was to investigate the effects of the combined therapy of monocyte locomotion inhibitor factor(MLIF), A91 peptide, and glutathione monoethyl ester(GSH-MEE) on chronic-stage spinal cord *** Sprague-Dawley rats underwent a laminectomy of the T9 vertebra and a moderate *** groups were included: sham, PBS, MLIF + A91, MLIF + GSH-MEE, A91 + GSH-MEE, and MLIF + A91 + *** months after injury, motor functional recovery was evaluated using the open field *** and white matter preservation was evaluated using hematoxylin & eosin staining and Luxol Fast Blue staining, *** number of motoneurons in the ventral horn and the number of axonal fibers were determined using hematoxylin & eosin staining and immunohistochemistry, *** deposition was evaluated using Masson's trichrome *** combined therapy of MLIF, A91, and GSH-MEE greatly contributed to motor functional recovery and preservation of the medullary parenchyma, white matter, motoneurons, and axonal fibres, and reduced the deposition of collagen in the lesioned *** combined therapy of MLIF, A91, and GSH-MEE preserved spinal cord tissue integrity and promoted motor functional recovery of rats after *** study was approved by the National Commission for Scientific Research on Bioethics and Biosafety of the Instituto Mexicano del Seguro Social under registration number R-2015-785-116(approval date November 30, 2015) and R-2017-3603-33(approval date June 5, 2017).

关键词： glutathione monoethyl ester monocyte locomotion inhibitor factor motor functional recovery neuroprotection neurorestoration peptides protective autoimmunity spinal cord injury

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