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Structural and optical properties of pillared Eu^(3+)-containing layered double hydroxides intercalated by 2-to 12-carbon aliphatic dicarboxylates

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Journal of Rare Earths 2022年第2期40卷 260-267,I0003页

作者： Alexandre Candido Teixeira ivan Guide Nunes Silva Alysson Ferreira Morais Danilo Mustafa Physics Institute.University of Sao Paulo 05508-090Sao PauloSPBrazil

While the versatile composition of layered double hydroxides(LDHs)allows the introduction of almost any polyvalent cation in their structure,the exchangeable negatively charged ions intercalated between the plates increase their vast range of *** we report on the preparation and optical properties of pillared Eu^(3+)-substituted ZnAl LDHs intercalated by aliphatic dicarboxylates:-OOC-(CH_(2))_(n-2)-COO-.The basal distance in these materials is dependent on the size and packing of the intercalated *** varying the number(n)of carbon atoms in the aliphatic chain from 2 to 12,the interlayer gallery of these ZnAlEu LDHs is considerably expanded from 0.9 to 2.1 *** the interlayer gallery,the aliphatic dicarboxylates form a monolayer,with the aliphatic chain inclined by an angleα≈63°with the hydroxide *** carbon atom in the COO-group is 0.43 nm far from the metal plane,showing that these carboxylates are not grafted in the brucite-like *** LDHs are thermally stable up to around 150℃,after which dehydroxylation of the hydroxide layers is *** Judd-Ofelt intensity parameters were obtained and compared to the Eu^(3+)-containing complexes with the same ligand series indicating a more symmetrical and less polarizable chemical environment around the rare earth ion.

关键词： Europium Layered double hydroxides Carboxylate ligands Luminescence Rare earths

Inter-sexual multimodal communication during mating in wild geladas:the leading role of females

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Current Zoology 2022年第5期68卷 570-580页

作者： Anna Zanoli Marco Gamba Alban Lemasson ivan Norscia Elisabetta Palagi 无 Department of Life Sciences and Systems Biology University of TurinVia Accademia Albertina 13Torino 10123Italy University of Rennes University of NormandieCNRSEthoS(Éthologie Animale et Humaine)263 Av.Général LeclercRennes 35700France Institut Universitaire de France 1 Rue DescartesParis 75005France Natural History Museum University of PisaVia Roma 79Calci(Pisa)56011Italy Department of Biology Unit of EthologyUniversity of Pisa Via Alessandro Volta 6Pisa 50126Italy

Female primates can emit vocalizations associated with mating that can function as honest signals of ***,we investigated the role of mating calls and visual signals in female geladas(Theropithecus gelada).Because females have a central role in the gelada society and seem to solicit sexual interactions,we answered whether they emit vocalizations in conjunction with gazing to increase mating success *** and during copulations,females can emit pre-copulation calls and copulation *** the first time,we identified a new female vocalization emitted at the final stage of copulations(end-copulation call),possibly marking the occurrence of *** found that longer pre-copulation call sequences were followed by both prolonged copulations and the presence of end-copulation calls,thus suggesting that females use pre-copulation calls to ensure successful copula ***,we found that different combinations of female vocal types and gazing had different effects on male vocal behavior and motivation to complete the *** analysis of the vocal and visual signals revealed a complex inter-sexual multimodal chattering with the leading role of females in the signal *** chattering,led by females,modulates male sexual arousal,thus increasing the probability of the copula success.

关键词： copulation calls female end-copulation call inter-sexual coordination mating success multimodal communication Theropithecus gelada

Area and shape distortions in open-source discrete global grid systems

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Big Earth Data 2022年第3期6卷 256-275页

作者： Alexander Kmoch ivan Vasilyev Holger Virro Evelyn Uuemaa Department of Geography Institute of Ecology and Earth SciencesUniversity of TartuTartuEstonia

A Discrete Global Grid System(DGGS)is a type of spatial reference system that tessellates the globe into many individual,evenly spaced,and well-aligned cells to encode location and,thus,can serve as a basis for data cube *** facilitates integration and aggregation of multi-resolution data from various sources to rapidly calculate spatial *** calculated normalized area and compactness for cell geometries from 5 open-source DGGS implementations-Uber H3,Google S2,RiskAware OpenEAGGR,rHEALPix by Landcare Research New Zealand,and DGGRID by Southern Oregon University-to evaluate their suitability for a global-level statistical data *** conclude that the rHEALPix and OpenEAGGR and DGGRID ISEA-based DGGS definitions are most suitable for global statistics because they have the strongest guarantee of equal area preservation-where each cell covers almost exactly the same area on the *** H3 has the smallest shape distortions,but Uber H3 and Google S2 have the largest variations in cell ***,they provide more mature software library *** provides excellent functionality to construct grids with desired geometric properties but as the only implementation does not provide functions for traversal and navigation within a grid after its construction.

关键词： Coordinate reference systems spatial indexing big spatial data analytics data cube DGGS

Satellite Image Classification Using a Hybrid Manta Ray Foraging Optimization Neural Network

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Big Data Mining and Analytics 2023年第1期6卷 44-54页

作者： Amit Kumar Rai Nirupama Mandal Krishna Kant Singh ivan Izonin Department of Electronics Engineering Indian Institute of TechnologyDhanbad(ISMDhanbad)Dhanbad 826004India Department of Electronics and Communication Engineering Asansol Engineering CollegeAsansol 713305India Department of CSE ASETAmity UniversityNoida 201301India Department of Artificial Intelligence Lviv Polytechnic National UniversityLviv 79000Ukraine

A semi supervised image classification method for satellite images is proposed in this *** satellite images contain enormous data that can be used in various *** analysis of the data is a tedious task due to the amount of data and the heterogeneity of the ***,in this paper,a Radial Basis Function Neural Network(RBFNN)trained using Manta Ray Foraging Optimization algorithm(MRFO)is *** is a three-layer network comprising of input,output,and hidden layers that can process large *** trained network can discover hidden data patterns in unseen *** learning algorithm and seed selection play a vital role in the performance of the *** seed selection is done using the spectral indices to further improve the performance of the *** manta ray foraging optimization algorithm is inspired by the intelligent behaviour of manta *** emulates three unique foraging behaviours namelys chain,cyclone,and somersault *** satellite images contain enormous amount of data and thus require exploration in large search *** spiral movement of the MRFO algorithm enables it to explore large search spaces *** proposed method is applied on pre and post flooding Landsat 8 Operational Land Imager(OLI)images of New Brunswick *** method was applied to identify and classify the land cover changes in the area induced by *** images are classified using the proposed method and a change map is developed using post classification *** change map shows that a large amount of agricultural area was washed away due to *** measurement of the affected area in square kilometres is also performed for mitigation *** results show that post flooding the area covered by water is increased whereas the vegetated area is *** performance of the proposed method is done with existing state-of-the-art methods.

关键词： Radial Basis Function Neural Network(RBFNN) Manta Ray Foraging Optimization algorithm(MRFO) Landsat 8 classification change detection disaster mitigation planning

Real-time intersection vehicle turning movement counts from live UAV video stream using multiple object tracking

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Journal of Intelligent and Connected Vehicles

Journal of Intelligent and Connected Vehicles 2023年第3期6卷 149-160页

作者： Yuhao Wang ivan Wang-Hei Ho Yuhong Wang Department of Electrical and Electronic Engineering The Hong Kong Polytechnic UniversityHong Kong SARChina Otto Poon Charitable Foundation Smart Cities Research Institute The Hong Kong Polytechnic UniversityHong Kong SARChina Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong Kong SARChina

The intelligent transportation system(ITS)is committed to ensuring safe and effective next-generation traffic throughout a ***,such efficient operation on urban traffic networks needs the support of big traffic data,especially Turning Movement Counts(TMC)at ***,TMC data are more challenging to collect due to labor cost and accuracy *** this paper,we leverage the capabilities of Unmanned Aerial Vehicles(UAV)to collect real-time TMC data in a cost-efficient *** proposed a real-time TMC data collection framework based on a live video *** vehicle tracking capability is boosted by multiple object tracking based on tracking by *** addition,a challenging case study was conducted,and our results demonstrate the feasibility and robustness of the proposed TMC data collection ***,with a GTX 1650 graphics card,about 10 FPS can be achieved in real-time for the TMC data *** overall accuracy is 91.93%,and the best case is over 98%*** the context of miscounting,the major reason is due to ID switching caused by background *** proposed framework is expected to provide real-time data for traffic capacity analysis and advanced traffic simulation such as digital twins.

关键词： turning movement counts unmanned aerial vehicles multi objects tracking real-time

PNN-SVM Approach of Ti-Based Powder’s Properties Evaluation for Biomedical Implants Production

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Computers, Materials & Continua 2022年第6期71卷 5933-5947页

作者： ivan Izonin Roman Tkachenko Michal Gregus Zoia Duriagina Nataliya Shakhovska Lviv Polytechnic National University Lviv79013Ukraine Comenius University in Bratislava Bratislava82005Slovak Republic The John Paul II Catholic University of Lublin Lublin20-708Poland

The advent of additive technologies has provided a significant breakthrough in the production of medical *** has reduced costs,increased productivity and accuracy of the implant manufacturing ***,there are problems associated with assessing defects in the microstructure,mechanical and technological properties of alloys,both during their production by powder metallurgy and in the process of 3D *** traditional research methods of alloys properties demand considerable human,material,and time *** the same time,artificial intelligence tools create opportunities for intelligent evaluation of the conformity for the microstructure,phase composition,and properties of titanium powder’s *** provides new possibilities for the efficient production of biocompatible implants for various functional ***,the accuracy of the methods and models used should be as high as *** this paper we designed a hybrid PNN-SVM(Probabilistic Neural Network-Support Vector Machine)high-precision approach for the intelligent evaluation of alloy properties for additive manufacturing of biomedical *** have proposed a new approach for extending the dimensionality of input data space by the outputs of the summation layer of the modified PNN *** classification based on the expanded dataset is performed using *** conducted experimental modeling of the proposed approach using a data set on the properties of titanium alloys Ti-6Al-4V and *** have demonstrated a significant increase in the accuracy of the PNN-SVM scheme compared to the single classifiers that form it and other machine learning methods.

关键词： PNN SVM hybrid systems classification accuracy medical implants additive manufacturing 3D printing titanium alloys

Comparison between Merrifield–Simmons Index and Wiener Index of Graphs

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Acta Mathematica Sinica,English Series 2022年第12期38卷 2220-2230页

作者： Ke Xiang XU Kinkar Chandra DAS ivan GUTMAN Meng Lu WANG College of Mathematics Nanjing University of Aeronautics&AstronauticsNanjing 210016P.R.China MIIT Key Laboratory of Mathematical Modelling and High Performance Computing of Air Vehicles Nanjing 210016P.R.China Department of Mathematics Sungkyunkwan UniversitySuwon16419Republic of Korea Facultyof Science Universityof KragujevacP.O.Bor 6034000 KragujevacSerbia

The Merrifield–Simmons indexσis the total number of independent vertex sets(including the empty set)of the graph *** Wiener index W is the sum of distances in all unordered pairs of vertices of *** construct some new graphs satisfyingσ>W and W>σ,*** particular,infinite graphs satisfying W>σare invented with graphs with diameter 2 and infinite ones satisfyingσ>W are discovered with so-called universally diametrical graphs.

关键词： Merrifield–Simmons index Wiener index Cartesian product independence number Fibonacci number universally diametrical graph

Double-skin façade simulation with computational fluid dynamics:A review of simulation trends,validation methods and research gaps

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Building Simulation 2023年第12期16卷 2307-2331页

作者： Simon Pommerencke Melgaard ivan Titov Nikolaisson Chen Zhang Hicham Johra Olena Kalyanova Larsen Department of the Built Environment Aalborg UniversityDenmarkThomas Manns Vej 239220 AalborgDenmark

Dynamic simulation of a double-skin façade(DSF)with computational fluid dynamics(CFD)can be challenging due to the lack of validated models and benchmarking ***,there is a lack of consensus in the scientific community on what constitutes a successfully validated DSF *** present review study identifies simulation trends and research gaps for DSFs simulated with ***,this article presents a series of CFD simulations in which key aspects of the DSF modelling are varied:2D or 3D modelling approaches,turbulence viscosity models(TVMs),radiation models,and wall *** simulation results are compared to the empirical data(both temperature and velocity fields)of a benchmark test with laboratory-controlled boundary *** analysis shows that using the k-εRNG model with enhanced wall treatment and surface-to-surface(S2S)radiation model yields the best results for the 2D case of natural convection ***,it is shown that accounting for the velocity field in the validation process is essential to ensure the suitability of a ***,the authors advocate for the use of selected dimensionless numbers to improve the comparability of the different DSF scientific *** would also help to identify relevant experimental datasets for validation and suitable CFD simulation settings for specific DSF cases.

关键词： double-skin facade ventilated cavity computational fluid dynamics empirical validation modelling parameters dimensionless numbers convection

Hide and seek with SARS-CoV-2: spike receptor-binding domain-specific memory B cells still recognize Omicron variant

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Signal Transduction and Targeted Therapy 2022年第11期7卷 3973-3975页

作者： ivan Odak Reinhold Förster Berislav Bošnjak Institute of Immunology Hannover Medical School30625HannoverGermany Cluster of Excellence RESIST(EXC 2155) Hannover Medical School30625HannoverGermany German Centre for Infection Research(DZIF) Partner site HannoverHannoverGermany

Sokal et *** recently in Immunity that the SARS-CoV-2 Omicron variant evades recognition by 70%of anti-spike protein antibodies generated by memory B cells(MBCs)from mRNA vaccine-immunized individuals that were either or not also infected with ***,samples from all analyzed persons contained MBCs with neutralizing antibodies against Omicron Spike receptor-binding domain(RBD),which provide protection against this SARS-CoV-2 variant to some degree.

关键词： vaccine antibodies