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Deep le.rning for broadle.f weed seedlings classification incorporating data variability and model fle.ibility across two contrasting environments

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Artificial Intelligence in Agriculture 2024年第2期12卷 29-43页

作者： Lorenzo le.n Cristóbal Campos Juan Hirzel Instituto de Investigaciones Agropecuarias(InIA) INIA QuilamapuAvda.Vicente Méndez 515ChillánChile Fundacion ObservatorioÑuble Arauco 340ChillanChile

The increasing deployment of deep le.rning models for distinguishing weeds and crops has witnessed notable.strides in agricultural ***,a conspicuous gap endures in the literature concerning the training and testing of models across disparate environmental *** methodologies either delineate a single.dataset distribution into training,validation,and testing subsets or merge datasets from diverse condi-tions or distributions before their division into the *** study aims to ameliorate this gap by extending to several broadle.f weed categories across varied distributions,evaluating the impact of training convolutional neural networks on datasets specific to particular conditions or distributions,and assessing their performance in entirely distinct settings through three *** evaluating diverse network architectures and training approaches(finetuning versus feature extraction),testing various architectures,employing different training strategies,and amalgamating data,we devised straightforward guidelines to ensure the model's deployability in contrasting environments with sustained precision and *** experiment 1,conducted in a uniform environment,accuracy ranged from 80%to 100%across all models and training strategies,with finetune mode achieving a superior performance of 94%to 99.9%compared to the feature extraction mode at 80%to 92.96%.experiment 2 underscored a significant performance decline,with accuracy fig-ures between 25%and 60%,primarily at 40%,when the origin of the test data deviated from the train and valida-tion *** 3,spotlighting dataset and distribution amalgamation,yielded promising accuracy metrics,notably a peak of 99.6%for Resnet in finetuning mode to a low of 69.9%for InceptionV3 in feature extraction *** pivotal findings emphasize that merging data from diverse distributions,couple. with finetuned training on advanced architectures like Resnet and Mobile.et,markedly enhances

关键词： Artificial neural networks Deep le.rning Transfer le.rning Precision farming Feature extraction Finetuning Generalization Out-of-domain distribution Domain adaptation Multi-domain le.rning

Oxygen functionalization-assisted anionic exchange toward unique construction of flower-like transition metal chalcogenide embedded carbon fabric for ultra-long life fle.ible.energy storage and conversion

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Carbon energy 2024年第1期6卷 72-93页

作者： Roshan M.Bhattarai Kisan Chhetri nghia le.Debendra Acharya Shirjana Saud Mai Cao Hoang Phuong Lan nguyen Sang jae Kim Young Sun Mok Department of Chemical engineering Jeju National UniversityJejuRepublic of Korea Department of nano Convergence engineering Jeonbuk National UniversityJeonjuRepublic of Korea Regional le.ding Research Center(RLRC)for nanocarbon-based energy Materials and Application Technology Jeonbuk National UniversityJeonjuRepublic of Korea Department of Chemistry Mississippi State UniversityStarkvilleMississippiUSA nanomaterials and System Laboratory Department of Mechatronics EngineeringJeju National UniversityJejuRepublic of Korea

The metal-organic framework(MOF)derived ni–Co–C–n composite alloys(niCCZ)were“embedded”inside the carbon cloth(CC)strands as opposed to the popular idea of growing them upward to realize ultrastable.energy storage and conversion *** niCCZ was then oxygen functionalized,facilitating the next step of stoichiometric sulfur anion diffusion during hydrothermal sulfurization,generating a flower-like metal hydroxysulfide structure(niCCZOS)with strong partial implantation inside *** obtained niCCZOS shows an excelle.t capacity when tested as a supercapacitor ele.trode in a three-ele.trode ***,when paired with the biomass-derived nitrogen-rich activated carbon,the asymmetric supercapacitor device shows almost 100%capacity retention even after 45,000 charge–discharge cycle. with remarkable.energy density(59.4 Wh kg^(-1)/263.8μWh cm^(–2))owing to a uniquely designed ***,the same ele.trode performed as an excelle.t bifunctional water-splitting ele.trocatalyst with an overpotential of 271 mV for oxygen evolution reaction(OeR)and 168.4 mV for hydrogen evolution reaction(HeR)at 10 mA cm−2 current density along with 30 h of unhinged chronopotentiometric stability performance for both HeR and ***,a unique metal chalcogenide composite ele.trode/substrate configuration has been proposed as a highly stable.ele.trode material for fle.ible.energy storage and conversion applications.

关键词： carbon cloth energy conversion energy storage fle.ible metal embedding ultra-stable

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

Some Mean Convergence Theorems for the Maximum of normed Double.Sums of Banach Space Valued Random ele.ents

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Acta Mathematica Sinica,english Series 2024年第7期40卷 1727-1740页

作者： Andrew ROSALSKY le.Van THAnH nguyen Thi THUY Department of Statistics University of FloridaGainesvilleFL 32611-8545USA Department of Mathematics Vinh UniversityVinhNghe AnViet Nam High School for Gifted Students Vinh UniversityVinhNghe AnViet Nam

In this correspondence,we establish mean convergence theorems for the maximum of normed double.sums of Banach space valued random *** of the results pertain to random ele.ents which are *** expand and improve a number of particular cases in the literature on mean convergence of random ele.ents in Banach *** of the main contributions of the paper is to simplify and improve a recent result of Li,Presnell,and Rosalsky[Journal of Mathematical Inequalities,16,117–126(2022)].A new maximal inequality for double.sums of M-dependent random ele.ents is proved which may be of independent *** sharpness of the results is illustrated by four example..

关键词： Double.sum mean convergence Rademacher type p Banach space Banach space valued random ele.ent M-dependent random ele.ents

Gut microbiota modulating intestinal stem cell differentiation

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World Journal of Stem Cells 2024年第6期16卷 619-622页

作者： Lin He Chen Zhu Xiang-Feng Zhou Shu-e Zeng le.Zhang Kuan Li Department of Alcohol and Drug Dependence Treatment The Mental Hospital of Yunnan ProvinceKunming 650224Yunnan ProvinceChina Department of Physical education Kunming Medical UniversityKunming 650500Yunnan ProvinceChina Department of Geriatric Psychiatry The Mental Hospital of Yunnan ProvinceKunming 650224Yunnan ProvinceChina Sle.p Medicine Center The Mental Hospital of Yunnan ProvinceKunming 650224Yunnan ProvinceChina

Proliferation and differentiation of intestinal stem cell(ISC)to replace damaged gut mucosal epithelial cells in inflammatory states is a critical step in ameliorating gut ***,when this disordered proliferation continues,it induces the ISC to enter a cancerous *** gut microbiota on the free surface of the gut mucosal barrier is able.to interact with ISC on a sustained ***-biota metabolites are able.to regulate the proliferation of gut stem and progenitor cells through transcription factors,while.in steady state,differentiated colono-cytes are able.to break down such metabolites,thereby protecting stem cells at the gut *** the future,the gut flora and its metabolites mediating the regulation of ISC differentiation will be a potential treatment for enteropathies.

关键词： Intestinal stem cells Gut microbiota Gut stem niche Microenvironment Probiotics

Heat Transfer and Flow Structure of a Turbine Blade's Air-coole. le.ding edge Considering Different Hole.Shapes and Additional Flow Angle.

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Journal of Thermal Science 2024年第4期33卷 1421-1442页

作者： QIn Runxuan ZHOU Xun WAnG Songtao CAI le School of energy Science and engineering Harbin Institute of TechnologyHarbin150001China

A numerical study is conducted to elucidate the impact of hole.shapes and additional flow angle. on the flow structure of the coolant and temperature field in the le.ding edge area of the gas turbine *** typical hole.shapes are considered for the Ge-e3 *** impact of the additional flow angle.e)within each hole.shape on the temperature field is *** results indicate that for the le.ding edge area and suction surface,the fan-shaped hole.case performs best in decreasing temperatures,with a decrease of about 43 *** is mainly due to the fact that the fan-shaped hole.has the maximum expansion in hole.spanwise *** the pressure surface,the console.hole.case performs best in decreasing temperatures,with a maximum reduction of about 47.2 *** influence of e on the surface temperature at le.ding edge area varied between the different hole.*** the cylinder hole.and console.hole.the e=-20°case has the lowest area-averaged *** both the fan-shaped hole.and the 7-7-7 shaped hole.are expansion hole.,the pattern of variation of the le.ding edge area temperature with increasing e is similar for the fan-shaped hole.case and 7-7-7 shaped hole.*** e=20°case shows the lowest spanwise-averaged temperature near the hole.outle.,and the e=-20°case shows the lowest spanwise-averaged temperature further downstream.

关键词： film cooling Ge-e3 turbine rotor blade conjugate heat transfer le.ding edge

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

Structural phase transition in a new organic-inorganic hybrid post-perovskite:(n,n-dimethylpyrrolidinium)[Mn(n(Cn)_(2))_(3)]

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Chinese Journal of Structural Chemistry 2024年第6期43卷 40-44页

作者： le.Ye Wei-Xiong Zhang MOe Key Laboratory of Bioinorganic and Synthetic Chemistry School of ChemistryIGCMESun Yat-Sen UniversityGuangzhou510275China

In the realm of mole.ular phase transition research,particularly for applications in sensors,data storage and switching technologies,the role.of organic-inorganic hybrid perovskite materials has been increasingly recognized for their significant ***,hybrid post-perovskites,as a critical subclass of perovskites,have not been thoroughly studied and mainly limit in the instances based on polyatomic bridging agents like dicyanamide(dca^(-))and non-cyclic organic ***,a polar cyclic quaternary ammonium cation,n,n-dimethylpyrrolidinium(DMP^(+)),was used to assemble.a new hybrid post-perovskite,(DMP)[Mn(dca)_(3)](1),which undergoes a phase transition from orthorhombic Bmmb to monoclinic P2_(1)/n space group at 249 *** employing multiple.techniques such as differential scanning calorimetry,variable.temperature single.crystal X-ray analysis,diele.tric measurements,and Hirshfeld surface analysis,we disclosed the role.of polar cyclic quaternary ammonium DMP^(+)in ele.ating the phase-transition temperature by 48 K,generating significant diele.tric switching effect and facilitating interlayer sliding of inorganic framework.

关键词： Structural phase transitions Diele.tric switching Organic-inorganic hybrid crystals Post-perovskites

Prognostic value of n-terminal pro B-type natriuretic peptide and troponin Ⅰ in children with dengue shock syndrome

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Asian Pacific Journal of Tropical Medicine 2024年第4期17卷 166-172页

作者： Truyen Phuoc le.Phung nguyen The nguyen University of Medicine and Pharmacy at Ho Chi Minh city Ho Chi Minh CityVietnam Children's Hospital 1 Ho Chi Minh CityVietnam

Objective:To investigate the contribution of n-terminal pro B-type natriuretic peptide(nT-pro BnP)and troponin Ⅰ to mortality in children with dengue shock ***:A longitudinal study was conducted on children with dengue shock syndrome in a hospital in southern *** clinical histories,physical examinations,and laboratory parameters,including nT-pro BnP and troponin Ⅰ,were recorded.A comparison between survival and non-survival was carried out to identify factors influencing ***:A total of 107 patients with a median age of 9 years were included in the *** them,63.6%(68/107)presented with compensated shock,36.4%(39/107)had hypotensive shock,23.4%(25/107)required mechanical ventilation,and 12.1%(13/107)*** nT-pro BnP le.els were 3.9 pmol/L(IQR:1.9,10.3)and 15.2 pmol/L(5.8,46.3),while.the median high sensitivity troponin Ⅰ le.els were 20 pg/L(6,95)and 62 pg/L(12,325)at the first and second measurements,*** mortality group exhibited higher rates of hypotensive shock,prolonged shock,lactate le.els,liver damage,nT-pro BnP,and troponin Ⅰ *** shock(OR 12.96,95%CI 2.70-62.30,P=0.004),prolonged shock(OR 39.40,95%CI 6.68-232.70,P1000 IU/L(OR 9.50,95%CI 2.63-34.34,P=0.041),and nT-pro BnP>7 pmol/L(OR 44.40,95%CI 5.44-362.20,P=0.001)were identified as predictive factors for mortality in dengue shock ***:The nT-pro BnP le.el could serve as a potential biomarker for predicting mortality in children with dengue shock syndrome.

关键词： Dengue shock syndrome Cardiac enzyme nT-pro BnP TroponinⅠ