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Optimal Design of Hybrid Microgrid in Isolated Communities of Ecuador

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Journal of Modern Power Systems and Cle.n Energy 2024年第2期12卷 488-499页

作者： Luis A.Pesantes Ruben Hidalgo-le.n Johnny Rengifo Miguel Torres Jorge Aragundi JoséCordova-Garcia Luis f.Ugarte facultad de Ingeniería en Ele.tricidad y Computación of Escuela Superior Politécnica del Litoral(ESPOL)University GuayaquilEcuador Department of Ele.trical Engineering at Universidad Técnica federico Santa María SantiagoChile IEEE

In rural territories, the communities use energy sources based on fossil fuels to supply themselves with ele.tricity, which may address two main proble.s: greenhouse gas emissions and high fuel prices. Hence, there is an opportunity to include renewable.resources in the energy mix. This paper develops an optimization model to determine the optimal sizing, the total annual investment cost in renewable.generation, and other operating costs of the components of a hybrid microgrid. By running a k-means clustering algorithm on a meteorological dataset of the community under study, the hourly representative values become input parameters in the proposed optimization model. The method for the optimal design of hybrid microgrid is analyzed in six operating scenarios considering:(1) 24-hour continuous power supply;(2) load shedding percentage;(3) diesel power generator(genset) curtailment;(4) the worst meteorological conditions;(5) the use of renewable.energy sources including battery energy storage systems(BESSs);and(6) the use of genset. A mathematical programming language(AMPL) tool is used to find solutions of the proposed optimization model. Results show that the total costs of microgrid in the scenarios that cover 100% of the load demand(without considering the scenario with 100% renewable.) increase by over 16% compared with the scenario with genset operation limitation. for the designs with power supply restrictions, the total cost of microgrid in the scenario with load shedding is reduced by over 27% compared with that without load shedding.

关键词： Battery energy storage system(BESS) isolated community microgrid renewable.energy optimization

Design of a Novel Exoskele.on with Passive Magnetic Spring Self-locking and Spine Lateral Balancing

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Journal of Bionic Engineering 2024年第1期21卷 236-255页

作者： Jhon f.Rodríguez-le.n Betsy D.M.Chaparro-Rico Daniele.Cafolla francesco Lago Eduardo Castillo-Castañeda Giuseppe Carbone Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada Unidad Querétaro MecatronicaInstituto Politécnico NacionalCerro Blanco 14176090 Colinas del CimatarioQuerétaroMexico Department of Mechanical Energy and Management EngineeringUniversity of CalabriaVia P.Bucci Cubo 46 C87036 RendeItaly faculty of Science and Engineering Department of Computer ScienceSwansea UniversitySwanseaUK CESTER University of Cluj-NapocaCluj-NapocaRomania

This paper proposes a new upper-limb exoskele.on to reduce worker physical *** proposed design is based on a novel PRRRP(P-Prismatic;R-Revolute)kinematic chain with 5 passive Degrees of freedom(Dof).Utilizing a magnetic spring,the proposed mechanism includes a specially designed locking mechanism that maintains any desired task *** proposed exoskele.on incorporates a balancing mechanism to alle.iate discomfort and spinal torsional effects also helping in limb weight *** paper reports specific models and simulations to demonstrate the feasibility and effectiveness of the proposed *** experimental characterization is performed to validate the performance of the mechanism in terms of forces and physical strain during a specific application consisting of ceiling-surface drilling *** obtained results preliminarily validate the engineering feasibility and effectiveness of the proposed exoskele.on in the intended operation task thereby requiring the user to exert significantly le.s force than when not wearing it.

关键词： Assistive mechanism Exoskele.on Locking mechanism Bionic robot

Development of an ultrathin liquid sheet target for laser ion accele.ation at high repetition rates in the kilohertz range

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High Power Laser Science and Engineering 2024年第3期12卷 134-145页

作者： M.füle.A.P.Kovács T.Gilinger M.Karnok P.Gaál S.figul G.Marowsky K.Osvay National Laser-Initiated Transmutation Laboratory University of SzegedSzegedHungary Department of Experimental Physics University of SzegedSzegedHungary ELI ALPS ELI-HU Non-Profit Ltd.SzegedHungary Department of Optics and Quantum Ele.tronics University of SzegedSzegedHungary Advanced Microfluidic Systems GmbH GöttingenGermany

A colliding microjet liquid sheet target system was developed and tested for pairs of round nozzle. of 10,11 and 18μm in *** sheet's position stability was found to be better than a few *** interaction with 50 mJ laser pulses,the 18μm jet has a resonance amplitude of 16μm at a repetition rate of 33 Hz,while.towards 100 Hz it converges to 10μm for all nozzle..A white-light interferometric system was developed to measure the liquid sheet thickness in the target chamber both in air and in vacuum,with a measurement range of 182 nm±1μm and an accuracy of±3%.The overall shape and 3D shape of the sheet follow the Hasson±Peck model in *** vacuum versus air,the sheet gradually loses 10%of its thickness,so the thinnest sheet achieved was below 200 nm at a vacuum le.el of 10±4mbar,and remained stable.for several hours of operation.

关键词： diagnostics laser ion accele.ation nanometric liquid sheet targets vacuum test

Rethinking multi-spatial information for transferable.adversarial attacks on speaker recognition systems

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CAAI Transactions on Intelligence Technology 2024年第3期9卷 620-631页

作者： Junjian Zhang Hao Tan le.Wang Yaguan Qian Zhaoquan Gu Guangzhou University GuangzhouChina Department of New Networks Peng Cheng LaboratoryShenzhenChina Harbin Institute of Technology(Shenzhen) ShenzhenChina Zhejiang University of Science and Technology HangzhouChina

Adversarial attacks have been posing significant security concerns to intelligent systems,such as speaker recognition systems(SRSs).Most attacks assume the neural networks in the systems are known beforehand,while.black-box attacks are proposed without such information to meet practical *** black-box attacks improve trans-ferability by integrating multiple.models or training on multiple.datasets,but these methods are *** by the optimisation strategy with spatial information on the perturbed paths and sample.,we propose a Dual Spatial Momentum Iterative fast Gradient Sign Method(DS-MI-fGSM)to improve the transferability of black-box at-tacks against ***,DS-MI-fGSM only needs a single.data and one model as the input;by extending to the data and model neighbouring spaces,it generates adver-sarial example. against the integrating *** reduce the risk of overfitting,DS-MI-fGSM also introduces gradient masking to improve *** authors conduct extensive experiments regarding the speaker recognition task,and the results demonstrate the effectiveness of their method,which can achieve up to 92%attack success rate on the victim model in black-box scenarios with only one known model.

关键词： speaker recognition spoofing attacks

Porphyrins,phthalocyanines,and related covale.t-organic frameworks in the photochemical and ele.trochemical water splitting:A review

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Particuology 2024年第7期90卷 236-265页

作者： Oxana V.Kharissova Yolanda Peña Méndez Boris I.Kharisov Ale.sandr LNikolaev Edith Luévano-Hipólito lucy T.Gonzále. Universidad Autónoma de Nuevo le.n Ave.Universidad s/nSan Nicolás de los GarzaNuevo León66455Mexico Department of Chemistry Moscow State UniversityVorobievy HillsMoscowRussia CONACYT-Universidad Autónoma de Nuevo le.n Facultad de Ingeniería Civil-Departamento de Ecomateriales y EnergíaCd.UniversitariaC.P.66455San Nicolás de los GarzaNLMexico Tecnologico de Monterrey Escuela de Ingeniería y CienciasMonterreyNuevo León 64890Mexico Tecnologico de Monterrey Centro del AguaMonterreyNuevo León 64890Mexico

In this review,the possibilities of photochemical and ele.trochemical water splitting(WS)using porphyrins,phthalocyanines,related macrocycle.,and their metal comple.es are *** efforts are being carried out in order to develop novel and cheap methods for water decomposition to generate inexhaustible.greener energy sources(mole.ular hydrogen)instead of oil and *** processes of WS in heterogeneous and homogeneous media require novel photo-and ele.trocatalysts,in particular those on macrocycle.basis.A high WS efficiency has been observed for porphyrins and phthalocyanines,showing their suitability both for HER and OER processes are available.using these relative compounds for WS *** can be used in photocatalytic and ele.trocatalytic WS processes both in their free forms or as metal porphyrins/porphyrinates,mainly loaded on various inorganic materials,such as Au NPs,C_(3)N_(4),GaP,KTaO_(3),GaP,and so on,as part of porphyrin-containing polymers or on ele.trode surface as modifying coatings,being sometimes better than commercial catalysts,such as Pt/*** H2 evolution can be considerably depended on the shape of porphyrin particle.;in particular,porphyrin nanowires can yield up to 20 times more H2 than its *** certain cases,both HER and OER can be driven in the same ele.trolyte using metal *** capacity of metal porphyrins to generate ROS(in particular,single. oxygen 1O_(2))under ultrasonic treatment is known and can be successfully used for H_(2)O_(2) and O_(2) *** can be used in similar processes in free form or as composites with inorganic or organic counterparts,being immobilized on nanocarbons,metal oxides and salts,or simply dissolved in water acting in a homogeneous *** additional use of ultrasound can le.d to better results due to the synergistic effect of the sonochemical treatment and ***-organic frameworks are also applied for WS purposes and are mainly based

关键词： Porphyrins Phthalocyanines COfs Water splitting Photocatalysis Ele.trocatalysis

Bacteria colonization and gene expression related to immune function in colon mucosa is associated with growth in neonatal calves regardle.s of live yeast supple.entation

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Journal of Animal Science and Biotechnology 2024年第5期15卷 1980-1995页

作者： Koki Nishihara Clothilde Villot Lautaro Cangiano le.Luo Guan Michael Steele Department of Animal Biosciences Animal Science and NutritionUniversity of GuelphGuelphON N1G 1Y2Canada Department of Agricultural Food and Nutritional ScienceUniversity of AlbertaEdmonton T6G 2P5Canada Lalle.and SAS Blagnac F‑31702France Department of Animal and Dairy Sciences University of Wisconsin-MadisonMadisonWIUSA faculty of Land and food Systems The University of British ColumbiaVancouverBC V6T 1Z4Canada Present Address:Department of Animal Biosciences University of GuelphGuelphON N1G 2W1Canada

Background As Holstein calves are susceptible.to gastrointestinal disorders during the first week of life,understanding how intestinal immune function develops in neonatal calves is important to promote better intestinal *** probiotics in early life may contribute to host intestinal health by facilitating beneficial bacteria colonization and developing intestinal immune *** objective of this study was to characterize the impact of early life yeast supple.entation and growth on colon mucosa-attached bacteria and host immune *** Twenty Holstein bull calves received no supple.entation(CON)or Saccharomyces cerevisiae boulardii(SCB)from birth to 5 d of *** tissue biopsies were taken within 2 h of life(D0)before the first colostrum feeding and 3 h after the morning feeding at d 5 of age(D5)to analyze mucosa-attached bacteria and colon *** sequencing showed that there was no difference inαandβdiversity of mucosa-attached bacteria between day and treatment,but bacteria related to diarrhea were more abundant in the colon mucosa on D0 compared to *** addition,q PCR indicated that the absolute abundance of Escherichia coli(***)decreased in the colon mucosa on D5 compared to D0;however,that of Bifidobacterium,Lactobacillus,and faecalibacterium prausnitzii,which could competitively exclude ***,increased in the colon mucosa on D5 compared to ***-sequencing showed that there were no differentially expressed genes between CON and SCB,but suggested that pathways related to viral infection such as“Interferon Signaling”were activated in the colon mucosa of D5 compared to *** Growth affected mucosa-attached bacteria and host immune function in the colon mucosa during the first 5 d of life in dairy calves independently of SCB *** early life,opportunistic pathogens may decrease due to intestinal environmental changes by beneficial bacteria and/or host immune *** activation

关键词： Colon biopsy Dairy calves RNA-sequencing Saccharomyces cerevisiae boulardii 16S rRNA amplicon-sequencing

Hydroxyapatite composites with carbon allotropes:Preparation,properties,and applications

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Particuology 2024年第5期88卷 239-265页

作者： Boris I.Kharisov Oxana V.Kharissova lucy T.Gonzále. Yolanda Peña Méndez Igor E.Uflyand Idalia Gómez de la fuente Universidad Autónoma de Nuevo le.n Ave.UniversidadCiudad UniversitariaSan Nicolás de los GarzaNuevo León 66455Mexico Tecnologico de Monterrey Escuela de Ingeniería y CienciasMonterreyNuevo Leon 64890Mexico Department of Chemistry Southern Federal UniversityRostov-on-DonRussia

Hydroxyapatite(HA)and its composites with inorganic additives,dopants,and polymers is a rapidly developing branch in the materials *** particular,carbon allotropes are widely used in these composites being widely applied for medical *** a gap of insufficient generalization of recent achievements in the field of the HA/Carbon composites,in this review we present the state of the art of the field of HA composites and hybrids with classic carbon allotropes and *** composites are known for carbon nanotubes,nanofibers,graphene and its oxidized forms,as well as,in a le.ser grade,for graphite,fulle.enes,nanodiamonds,carbon nanofoams,*** composites can be fabricated by a variety of classic and le.s-common methods,such as co-precipitation(with or without ultrasonic treatment),CVD,hot isostatic pressing,hydrothermal,spark plasma sintering,biomimetic mineralization,thermal and plasma spray,ele.trochemical and ele.trophoretic deposition,self-assembling,3D printing,ele.trospinning,and lyophilisation,among *** of various synthesis techniques can be also carried out for composite *** or synthetic HA can be used as it is for further interaction with carbon allotropes or it can be first prepared and then reacted with carbon counterpart;similarly,carbon allotropes can be introduced into the interaction with HA directly or they can be first synthesized,in particular from *** biocompatible.composites can be produced in the form of coatings,powders,and scaffolds and can additionally contain quantitative amounts of third phases,frequently natural or synthetic *** these composites,especially with O-containing functionalizing groups,HA disadvantages could be considerably decreased with simultaneous enhancement of mechanical properties,becoming similar to human bone,chemical stability and biocompatibility,as well as possessing antibacterial ***→G reduction and higher HA decoration were obs

关键词： Hydroxyapatite Carbon nanotubes Graphene Quantum dots fulle.enes Nanodiamonds

Interface optimization and defects suppression via Na f introduction enable.efficient fle.ible.Sb_(2)Se_(3) thin-film solar cells

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Journal of Energy Chemistry 2024年第3期90卷 165-175,I0006页

作者： Mingdong Chen Muhammad Ishaq Donglou Ren Hongli Ma Zhenghua Su Ping fan David le.Coq Xianghua Zhang Guangxing Liang Shuo Chen Shenzhen Key Laboratory of Advanced Thin films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060GuangdongChina State Key Laboratory of featured Metal Materials and Life-cycle.Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004GuangxiChina CNRS ISCR(Institut des Sciences Chimiques de Rennes)UMR 6226Universitéde RennesRennes F-35000France

Sb_(2)Se_(3) with unique one-dimensional(1D) crystal structure exhibits exceptional deformation tole.ance,demonstrating great application potential in fle.ible.***,the power conversion efficiency(PCE) of fle.ible.Sb_(2)Se_(3) photovoltaic devices is temporarily limited by the complicated intrinsic defects and the undesirable.contact ***,a high-quality Sb_(2)Se_(3) absorber layer with large crystal grains and benign [hkl] growth orientation can be first prepared on a Mo foil *** Naf intermediate layer is introduced between Mo and Sb_(2)Se_(3),which can further optimize the growth of Sb_(2)Se_(3)thin ***,positive Na ion diffusion enable. it to dramatically lower barrier height at the back contact interface and passivate harmful defects at both bulk and *** a result,the champion substrate structured Mo-foil/Mo/Naf/Sb_(2)Se_(3)/CdS/ITO/Ag fle.ible.thin-film solar cell delivers an obviously higher efficiency of 8.03% and a record open-circuit voltage(V_(OC)) of 0.492 *** fle.ible.Sb_(2)Se_(3) device also exhibits excelle.t stability and fle.ibility to stand large bending radius and multiple.bending times,as well as superior weak light photo-response with derived efficiency of 12.60%.This work presents an effective strategy to enhance the fle.ible.Sb_(2)Se_(3) device performance and expand its potential photovoltaic applications.

关键词： Sb_(2)Se_(3) fle.ible.solar cells Naf intermediate layer Interface optimization Defects suppression

Antibacterial and cytotoxic metabolites produced by Streptomyces tanashiensis BYf-112 isolated from Odontotermes formosanus

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Chinese Journal of Natural Medicines 2024年第9期22卷 822-830页

作者： WU Jun SONG Tao ZHANG le.HUANG Zhongdi HUANG fang YIN Caiping ZHANG Shuxiang LIU Xinhua ZHANG Yinglao School of Life Science Anhui Agricultural UniversityHefei 230036China School of Pharmacy Anhui Medical UniversityHefei 230036China

Chemical investigations of the termite-associated Streptomyces tanashiensis BYf-112 resulted in the discovery of four novel alkaloid derivatives: vegfrecines A and B(1 and 2), exfoliazone A(3), and venezueline H(7), in addition to nine known metabolites(4-6, 8-13). The structures of these compounds were elucidated through comprehensive spectroscopic analysis and comparison with existing literature data. Antibacterial assays reveale. that viridomycin A(11) exhibited potent antibacterial activity against Staphylococcus aureus, with a zone of inhibition(ZOI) of 12.67 mm, in comparison to a ZOI of 17.67 mm for the positive control gentamicin sulfate. Viridomycin A(11) showed moderate activity against Micrococcus tetragenus and Pseudomonas syringae pv. actinidae, with ZOI values of 15.50 and 14.33 mm, respectively, which were inferior to those of gentamicin sulfate(34.67 and 24.00mm). Viridomycin f(12) also exhibited moderate antibacterial effects against S. aureus, M. tetragenus, and P. syringae pv. actinidae,with ZOI values of 8.33, 16.50, and 10.83 mm, respectively. Cytotoxicity assays demonstrated that viridobruunine A(5), exfoliazone(6), viridomycin A(11), and X-14881E(13) exhibited significant cytotoxicity against human malignant melanoma(A375), ovarian cancer(SKOV-3), and gastric cancer(MGC-803) cell lines, with IC_(50) values ranging from 4.61 to 19.28 μmol·L^(-1). furthermore, bioinformatic analysis of the comple.e genome of S. tanashiensis suggested a putative biosynthetic gene cluster(BGC) responsible.for the production of compounds 1-12. These findings indicate that the secondary metabolites of insect-associated S. tanashiensis BYf-112hold promise as potential sources of novel antibacterial and anticancer agents.

关键词： Odontotermes formosanus Streptomyces tanashiensis Alkaloid Cytotoxic activity Antibacterial activity Biosynthetic pathway