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Optimal Positioning Strategy for Multi-Camera Zooming Drones

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IEEE/CAA Journal of Automatica Sinica 2024年第8期11卷 1802-1818页

作者： Manuel Vargas carlos vivas Teodoro Alamo Department of System Engineering and Automation University of SevilleSeville 41092Spain

In the context of multiple-target tracking and surveillance applications,this paper investigates the challenge of determining the optimal positioning of a single autonomous aerial vehicle or agent equipped with multiple independently-steerable zooming cameras to effectively monitor a set of targets of *** camera is dedicated to tracking a specific target or cluster of *** key innovation of this study,in comparison to existing approaches,lies in incorporating the zooming factor for the onboard cameras into the optimization *** enhancement offers greater flexibility during mission execution by allowing the autonomous agent to adjust the focal lengths of the onboard cameras,in exchange for varying real-world distances to the corresponding targets,thereby providing additional degrees of freedom to the optimization *** proposed optimization framework aims to strike a balance among various factors,including distance to the targets,verticality of viewpoints,and the required focal length for each *** primary focus of this paper is to establish the theoretical groundwork for addressing the non-convex nature of the optimization problem arising from these *** this end,we develop an original convex approximation *** paper also includes simulations of diverse scenarios,featuring varying numbers of onboard tracking cameras and target motion profiles,to validate the effectiveness of the proposed approach.

关键词： Convex optimization projective transformation unmanned aerial vehicle visual object tracking visual surveillance.

A SIMPLE METHOD TO DETERMINE THE DAYLIGHT FACTOR FROM THE VERTICAL DAYLIGHT FACTOR IN DIFFERENT STREET CANYON GEOMETRY

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Journal of Green Building 2016年第2期11卷 75-92页

作者： jorge S.carlos C-MADE Centre of Materials and Building TechnologiesUniversity of Beira InteriorCalçada Fonte do Lameiro6200-358 CovilhãPortugal

This paper investigates the main characteristics of daylight on any window in a street *** sky component and the light reflected from the surroundings are described to determine the vertical daylight factor(VDF).Several street canyon types are characterized taking into account their different height/width and any level of the window is analysed.A simple calculation method uses trigonometric equations based on the sky and the geometry of the *** results were previ-ously evaluated considering different daylight procedures obtained by other *** study reveals that the reflectance within an urban canyon plays an important role in the amount of daylight onto any window with more relevance in a deep canyon and low sky *** graphical presentation that result from this investiga-tion can rapidly assist building and urban designers in an early stage design where assumptions and the lay out of the main design take place.

关键词： vertical daylight factor urban canyon configuration factor diffuse light isotropic overcast sky

OPTIMAL WINDOW GEOMETRY FACTORS FOR ELEMENTARY SCHOOL BUILDINGS IN PORTUGAL

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Journal of Green Building 2018年第1期13卷 185-197页

作者： jorge S.carlos Centre of Materials and Building Technologies(CMADE-UBI) Universidade da Beira InteriorRua Marquês D’Ávila e Bolama6200-001CovilhãPortugal

INTRODUCTION With respect to thermal performance, windows are the weakest component of the building envelope, essentially because the U-value is usually higher than the opaque envelope. This would allow the highest heat conductance of the building envelope. However, it also helps buildings to gain useful solar heat during winter. Therefore, it has been generally accepted that passive buildings would have small windows towards the poles and large windows facing the equator (Persson, Roos, and Wall 2006). In spite of this guideline, large or fully glazed facades have been used in modern architecture. The intensive use of air conditioning is the result of overheating and high thermal loss problems, which otherwise would lead to thermal discomfort. This extensive use of large windows associated with high energy consumption has motivated researchers to study this building component. Window areas were investigated by Persson et al. (Persson, Roos, and Wall 2006) on 20 terraced houses with larger windows facing the equator and built in Gothenburg. The building envelope was well insulated and fitted with energy efficient windows. It was found that energy efficient windows do not have a major influ-ence on the heating demand in the winter, but it is relevant for the cooling need in summer. Therefore, reduced indoor illuminance due to small windows can be solved by enlarging them in order to obtain relevant daylighting conditions. When efficient windows are designed for a warm climate, as in Mexico, reducing heat flux and solar transmittance indoors was the best option for energy savings (Aguilar et al. 2017). However, reducing solar transmittance influences the indoor illuminance, which was not analyzed.

关键词： school building classroom windows solar heat gain daylight

Strategic adjustment of copulatory plug size in a nematode

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Current Zoology 2019年第5期65卷 571-577页

作者： jorge Canales-LAZCANO jorge Contreras-GARDUNO carlos CORDERO Posgrado en Ciencias Biomedicas Institute)de EcologiaUNAMCircuito Exterior S/Nanexo al Jardfn Botanico exteriorCiudad UniversitariaCiudad de MexicoMexico Escuela Nacional de Estudios Superiores Universidad Nacional Autonoma de MexicoUnidad MoreliaAntigua Carretera a Patzcuaro No.8701Col.Ex-Hacienda San Jose de la HuertaMoreliaMichoacanMexico Departamento de Ecologia Evolutiva Instituto de EcologlaUNAMCircuito Exterior S/Nanexo al Jardin Botanico exteriorCiudad UniversitariaCiudad de MexicoMexico

Copulatory plugs(CP)are substances produced during copulation that block the genital openings of the *** several species of Nematoda,males produce CP that are thought to impede female remating and thus sperm *** relatively large size of the CP in several nematodes,and its evolutionary loss in self-fertilizing populations of Caenorhabditis elegans,suggests that CP are costly to *** CP production is costly,the application of basic concepts of strategic ejaculation theory suggests a modulated allocation of CP in response to sperm competition *** hypothesis led us to predict that males perceiving a higher risk of sperm competition will produce larger *** tested these ideas with the entomopathogenic,gonochoristic nematode Rhabditis *** first experiment provides evidence suggesting that production of CP is costly,because the size of CP is negatively affected by stressful conditions(high population density,small male adult size,and suboptimal food type).The results of our second experiment support the prediction that males adjust the size of CP to sperm competition risk:the average size of CP increased as the number of males competing for one female ***,our study supports the idea that in *** the production of CP is costly for males and that the size of the CP produced is influenced by sperm competition risk.

关键词： copulatory plug sexual selection sperm competition strategic ejaculation nematodes

Avian responses to an extreme weather event:The case of the‘Filomena’snowstorm in Madrid(central Spain)

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Avian Research 2024年第2期15卷 180-186页

作者： carlos Lazaro carlos Sanchez-García Fabian Casas E.jorge Tizado Department of Research Fundacion Artemisan13001 Ciudad RealSpain Department of Zoology Faculty of SciencesUniversity of GranadaGranadaSpain Department of Biodiversity and Environmental Management Universidad de Leon24401 PonferradaSpain

Cold spells and severe weather may have detrimental effects in wild birds,but owing to the stochastic nature of these events,it is not always possible to measure their *** January 2021,a strong snowstorm known as‘Filomena’affected Spain,mainly the region of Madrid(Central Spain),which was fully covered with snow and suffered freezing temperatures for a *** bird surveys conducted in the winter-spring of 2020 and 2021(before and after Filomena)at same locations,we addressed the possible impact of the cold spell in three widespread gamebirds:Wood Pigeon(Columba palumbus),Eurasian Magpie(Pica pica)and Red-legged Partridge(Alectoris rufa).No significant abundance differences were found between years for none of the species and hunting pressure was only significantly reduced for Partridges,hence this species may have been negatively affected by *** suggest that in response to Filomena,Pigeons conducted partial migration in search of better conditions,while Magpies aggregated in certain areas of Madrid and Partridges endured the harsh conditions within their home *** results highlight the importance to alleviate negative impacts of extreme weather events in wild birds through management actions,especially for sedentary species.

关键词： Alectoris rufa Climate change Cold spell Columba palumbus Migration Pica pica Winter

Determination of energy dissipation of a spider silk structure under impulsive loading

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Frontiers of Mechanical Engineering 2015年第3期10卷 306-310页

作者： jorge ALENCASTRE carlos MAGO Richard RIVERA 1.Pontificia Universidad Católica del Perú Lima Perú

Various researches and studies have demonstrated that spider silk is much stronger and more deformable than a steel string of the same diameter from a mechanical approach. These excellent properties have caused many scientific disciplines to get involved, such as bio-mechanics, bio-materials and bio-mimetics, in order to create a material of similar properties and characteristics. It should be noted that the researches and studies have been oriented mainly as a quasi-static model. For this research, the analysis has taken a dynamic approach and determined the dissipation energy of a structure which is made of spider silk ＂Dragline＂ and produced by the Argiope- Argentata spider, through an analytical-experimental way, when being subjected to impulsive loading. Both experi- mental and analytical results, the latter obtained by using adjusted models, have given high levels of dissipation energy during the first cycle of vibration, which are consistent with the values suggested by other authors.

关键词： dissipation energy impact visco-elasticmaterial spider silk

DAYLIGHT IN A CISTERCIAN HERITAGE CHURCH IN LISBON,FROM RURAL TO URBAN CONTEXT

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Journal of Green Building 2014年第3期9卷 116-130页

作者： jorge S.carlos Ana M.T.Martins Centre of Materials and Building Technologies University of Beira InteriorCalçada Fonte do Lameiro6201-001 CovilhãPortugal Department of Civil Engineering and Architecture University of Beira Interior/CITADResearch Centre in TerritoryArchitecture and DesignLisbonPortugalCalçada Fonte do Lameiro6201-001 CovilhãPortugal.

Light levels in the churches of the Cistercian Order are mostly related to the fulfilment of liturgical *** compound building of Bernardas’Convent includes a church at the utmost southern corner that dates back to the 17th *** only has one façade facing due *** paper analyses the relationship between daylight conditions within the building before and after the urbanisation of the surrounding area;taking into account the relationship between the church,its main activities,and solar trajectory.A comparative analysis of the relationship between the actual surrounding context and the initial period after it was built(open field)is *** highest reflectance of the street canyon has augmented the levels of available daylight.

关键词： Sun-path Daylight factor Vertical daylight factor Urban canyon Cistercians Heritage

The versatility of Fe(Ⅱ) in the synthesis of uniform citrate-stabilized plasmonic nanoparticles with tunable size at room temperature

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Nano Research 2020年第9期13卷 2351-2355页

作者： carlos Fernández-Lodeiro Javier Fernández-Lodeiro Enrique Carbó-Argibay carlos Lodeiro jorge Pérez-Juste Isabel Pastoriza-Santos CINBIO Universidade de VigoCampus universitario LagoasMarcosende36310 VigoSpain Galicia Sur Health Research Institute(IIS Galicia Sur) SERGAS-UVIGO36312 VigoSpain BIOSCOPE Group LAQV@REQUIMTEChemistry DepartmentNOVA School of Science and TechnologyNOVA University LisbonCaparica Campus2829-516 CaparicaPortugal PROTEOMASS Scientific Society Rua dos InventoresMadam ParqueCaparica Campus2829-516 CaparicaPortugal International Iberian Nanotechnology Laboratory(INL) Av.Mestre Jose Veiga s/n4715-330 BragaPortugal

A highly versatile seed-mediated approach for the synthesis of citrate-stabilized gold,silver and palladium nanoparticles(NPs)with size control is *** use of iron(Ⅱ)as a reducing agent enables the fabrication of monodisperse NPs in a wide range of sizes(from 15 nm to at least 120 nm(90 nm for Pd))at room *** citrate as capping ligand on the NPs surface facilitates its further surface modification with proteins and thiolated molecules.

关键词： plasmonic nanoparticles gold silver palladium citrate-stabilized Fe(Ⅱ)

Generating oligodendroglia from adult mesenchymal cells for transplantation:cell reprogramming or direct lineage conversion?

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Neural Regeneration Research 2023年第7期18卷 1493-1494页

作者： jorge Pascual-Guerra JoséA.Rodríguez-Navarro carlos L.Paíno Service of Neurobiology-Research Ramón y Cajal University Hospital-IRYCISMadridSpain Department of Cellular Biology Complutense UniversityMadridSpain

Cell replacement therapy has long been proposed as a treatment for the damaged nervous *** of the most challenging aspects of such a strategy,however,is finding sources of donor cells for *** neural cells are rarely an option as every cell in the nervous system has a defined function that would be lost if that cell was to be *** possibility would be sourcing precursor or differentiated cells from fetal tissues;however,aside from ethical issues,heterologous cells are at risk of immunological rejection in the long *** improvements over the past 15 years have led to the possibility that autologous non-neural cells could be used for cell transplantation through their conversion into neural derivatives.

关键词： neural programming removed