检索结果-南通市图书馆

Technology trajectory in aviation:Innovations leading to value creation(2000-2019)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Innovation Studies 2022年第3期6卷 128-141页

作者： Bruno alencar Pereir Gui Lohmann Luke Houghton School of Engineering and Built Environment Grifith UniversityBrisbaneQLD4111Australia Department of Business Strategy and Innovation Grifth UniversityBrisbaneQLD411Australia

This study identifies relevant innovations and discusses value creation in the aviation industrybetween 2000and *** expertswithexperiencein innovation were selected and invited to complete a survey identifying the leading innovations in the *** study contributes to recent aviation history by offering a list of innovations and a discussion of technological path dependency and value proposition with *** overview is helpful to academics and practitioners to verify how these innovations have shaped the industry worldwide,making it more efficient,agile,sustainable,and *** innovations selected comprise consolidated technologies and emerging advances introduced in the timeframe proposed.33 innovations primarily related to incremental and technical typologies that add value to products were *** addition,this study provides insightful findings by classifying the value created for the aviation sector into five innovation clusters:(1)aircraft technology,adding value in terms of efficiency and sustainability;(2)innovation in passenger services,creating more personalized services and enhancing the customer experience;(3)innovation in flying,adding value in terms of safety and the security environment;(4)business and operational management,improving procedures and revenue;(5)and general applications,adding value in terms of Aviation 4.o(increases in automation and data exchange,including cyber-physical systems,the Internet of Things(IOT)and cloud computing).

关键词： Aviation Airtransport Innovation Valuecreation Technology

On the Performance of the Energy Detector Subject to Impulsive Noise in κ-μ, α-μ, and η-μ Fading Channels

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2017年第4期22卷 360-367页

作者： Jos V.M.Cardoso Wamberto J.L.Queiroz Hang Liu Marcelo S.alencar Department of Electrical Engineering Federal University of Campina Grande Department of Electrical Engineering and Computer Science The Catholic University of America

This paper presents a unified theoretical analysis of the energy detection of Gaussian and M-PSK signals in κ-μ,α-μ,and η-μ fading channels at the output of an energy detector subject to impulsive noise（Bernoulli-Gaussian model）. As a result, novel, simple, and accurately approximated expressions for the probability of detection are derived. More precisely, the generalized Gauss-Laguerre quadrature is applied to approximate the probability of detection as a simple finite sum. Monte Carlo simulations corroborate the accuracy and precision of the derived approximations. The results are further extended to cooperative energy detection with hard decision combining information.

关键词： spectrum sensing energy detector fading channel impulsive noise

Detection of flock movement and behaviour of broiler chickens at different feeders using image analysis

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Information Processing in Agriculture 2015年第3期2卷 177-182页

作者： Diego Pereira Neves Saman Abdanan Mehdizadeh Matthew Tscharke Irenilza de alencar Nääs Thomas Michael Banhazi Structure&Motion Laboratory Royal Veterinary CollegeUniversity of LondonLondonUnited Kingdom Department of Mechanics of Biosystems Engineering College of Agricultural Engineering and Rural DevelopmentRamin University of Agriculture and Natural Resources of KhuzestanMollasaniAhvazKhuzestanIran NCEA University of Southern QueenslandToowoomba CampusQLDAustralia Agricultural Engineering College State University of CampinasCampinasSPBrazil NCEA and Faculty of Health Engineering and ScienceUniversity of Southern QueenslandToowoomba CampusQLDAustralia

The behaviour of broiler chickens has been extensively studied as a function of stocking density and environmental conditions,but limited information was reported in the scientific literature about the effect of feeder type on birds’feeding *** main objective of this study was to assess the effects of three different feeder types in relation to the birds’behaviour in its *** analysed feeders were:tube-type with partition grid(F1);tube-type without partition grid(F2);and automatic type with partition grid(F3).The considered variables were:occupied area(OA);activity index(AI)(flock movement);total birds presented in the area(TB);and birds effectively eating(EE).OA and AI were calculated by computational image analysis while TB and EE were manually *** results indicated that the feeder type could have influenced the birds’behaviour regarding to OA(R2=0.56),TB(R2=0.48),and EE(R2=0.40),but AI(R2=0.01)was not found to be directly influenced by the feeder type.A higher percentage of birds effectively eating were found in F2(86.4%),which was the one with the largest free area to access the *** average number of total birds was found in F1,but with a lower percentage of individuals effectively eating(63.3%),which means that birds were nearby this feeder performing other *** the assessed feeders were in the same house under the same conditions,it can be suggested that not only the free area to access the feed but potentially the design of feeders could have influenced the birds’feeding *** real beneficial effect of the adoption of partition grid on feed trays is still uncertain,and it is also unclear whether the financial value of reduced wastage would compensate the possible reduction in feed intake.

关键词： Activity index Animal behaviour Feeding Image processing Motion Occupied area

Blue LED as a new treatment to vaginal stenosis due pelvic radiotherapy:Two case reports

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第23期9卷 6839-6845页

作者： Daniela Barros Cecília Alvares Teresa.alencar Priscila Baqueiro Augusto Marianno Rafael Alves Juliana Lenzi Laura Ferreira Rezende Patricia Lordelo Oncology Department Hospital Santa IzabelSalvador 40290-000Brazil Pelvic Floor Care Center(CAAP)and Postgraduate Bahiana School of Medicine and Public HealthSalvador 40290-000Brazil Oncology Department NOB/Grupo OncoclinicasSalvador 40290-000Brazil Pelvic Floor Care Center(CAAP) University Center of the Associated Teaching FacultiesCampinas 40000000Brazil Physiotherapy Instituto Patrícia Lordelo-IPLSalvador 40290-000Brazil

BACKGROUND Currently,the advancement cancer treatment technology improves overall survival,however,adverse events are still a challenge for health *** syndrome of menopause and vaginal stenosis are conditions that impact the quality of life of patients undergoing *** present two such cases in patients with previous cervical and endometrial *** conditions were handled with an innovative method using an energy-based device with blue light emitting diode for concomitant vaginal and vulvar *** impact in clinical findings,cytologic changes,and referred symptoms were *** SUMMARY One patient diagnosed with vaginal severe vaginal stenosis with previous cervix cancer treatment and other patient diagnosed with mild stenosis with severe dyspareunia and recent endometrium cancer treatment were considered for vulvovaginal treatment with weekly blue led device and closely evaluated with repeated validated questionnaires and cytological *** This innovative technique showed an improvement in all areas of the examiner's criteria,the cytological criteria,and most bothered symptoms.

关键词： Radiotherapy Atrophic vaginitis Vaginal diseases Laser therapy Semiconductor diode lasers Nonhormonal vaginal therapy Case report

Lameness prediction in broiler chicken using a machine learning technique

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Information Processing in Agriculture 2021年第3期8卷 409-418页

作者： Irenilza de alencar Naas Nilsa Duarte da Silva Lima Rodrigo Franco Gonc¸alves Luiz Antonio de Lima Henry Ungaro Jair Minoro Abe Paulista University-Graduate Program in Production Engineering Sao PauloBrazil

Broiler flock welfare is usually assessed through mortality,physiology,behavior,and walk-ing *** possibility of assessing broiler chicken lameness using the bird walking abil-ity was investigated using the machine learning approach for the first *** on broiler walking speed and acceleration,genetic strain,and sex were recorded and input in a *** were classified according to the 6-point gait score(GS0 is a sound bird,and GS5 is a severely lame bird).Decision trees were built initially using all *** confusion matrix of each developed model was *** pruning technique was used,removing from the dataset the variables that did not infer in the classification *** reorganized the dataset and re-arranged the data by grouping the intermediate target class of gait score using the Borda Count ***-processing data,we obtained a new set of decision *** the 3-point gait score(GS0 is a sound bird,and GS2 is a lame bird),we obtained a new model with better accuracy(78%);however,the model had a lower accuracy for classifying lame broilers(GS2,5%).The final decision tree was selected for classifying broilers,either sound or lame,according to their walking *** developed model presented good accuracy(91%),and it ordered properly sound(86%)and lame birds(92%).The novel model might be used to assess broiler lameness on-farm by registering the bird displacement *** developments using the model might allow flock lameness detection automatically.

关键词： Broiler welfare Broiler walking speed Decision tree Confusion matrix Gait score

Angle-tunable intersubband photoabsorption and enhanced photobleaching in twisted bilayer graphene

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2021年第8期14卷 2797-2804页

作者： Eva A.A.Pogna Xianchong Miao Driele von Dreifus Thonimar V.alencar Marcus V.O.Moutinho Pedro Venezuela Cristian Manzoni Minbiao Ji Giulio Cerullo Ana Maria de Paula Istituto di Nanoscienze CNR-NANO Laboratory NESTPiazza San Silvestro 12Pisa 56127Italy State Key Laboratory of Surface Physics and Department of Physics Fudan UniversityShanghai 200433China Departamento de Fisica Institute de Ciencias ExatasUniversidade Federal de Minas GeraisBelo Horizonte-MG 31270-901Brazil Departamento de Fisica Institute de Ciencias Exatas e BiologicasUniversidade Federal de Ouro PretoOuro Preto-MG 35400-000Brazil Ndcleo Multidisciplinar de Pesquisas em Computagao-NUMPEX-COMP Campus Duque de CaxiasUniversidade Federal do Rio de JaneiroDuque de Caxias-RJ25265-970Brazil Institute de Fisica Universidade Federal FluminenseUFFNiteroi-RJ24210-346Brazil IFN-CNR Dipartimento di FisicaPolitecnico di MilanoPiazza L.da Vinci 32Milano 20133Italy

Van der Waals heterostructures obtained by artificially stacking two-dimensional crystals represent the frontier of material engineering,demonstrating properties superior to those of the starting *** control of the interlayer twist angle has opened new possibilities for tailoring the optoelectronic properties of these *** bilayer graphene with a strong interlayer coupling is a prototype of twisted heterostructure inheriting the intriguing electronic properties of *** the effects of the twist angle on its out-of-equilibrium optical properties is crucial for devising optoelectronic *** this aim,we here combine excitation-resolved hot photoluminescence with femtosecond transient absorption *** hot charge carrier distribution induced by photo-excitation results in peaked absorption bleaching and photo-induced absorption bands,both with pronounced twist angle *** simulations of the electronic band structure and of the joint density of states enable to assign these bands to the blocking of interband transitions at the van Hove singularities and to photo-activated intersubband *** tens of picoseconds relaxation dynamics of the observed bands is attributed to the angle-dependence of electron and phonon heat capacities of twisted bilayer graphene.

关键词： twisted bilayer graphene transient absorption microscopy hot-photoluminescence van der Waals heterostructures optoelectronic properties van Hove singularities

NiWO4 powders prepared via polymeric precursor method for application as ceramic luminescent pigments

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2020年第1期9卷 55-63页

作者： Naiara A.LIMA Lorena D.S.alencar Máximo SIU-LI Carlos A.C.FEITOSA Alexandre MESQUITA Jean-Claude M’PEKO Maria I.B.BERNARDI Instituto de Física de Sao Carlos Universidade de Sao Paulo13560-970 Sao CarlosSPBrazil Instituto Federal de Mato Grosso do Sul IFMS79200-000 AquidauanaMSBrazil Departamento de Física Centro de Ciências Exatas e TecnologiaUniversidade Federal do MaranhaoUFMA65080-805Sao LuisMABrazil Instituto de Geociências e Ciências Exatas Departamento de FísicaUniversidade Estadual Paulista13506-900Rio ClaroSPBrazil

Ni WO4 was prepared using the polymeric precursor method and studied in terms of physical and chemical properties to verify its stability for industrial applications as *** characterization was accomplished using thermal analyses,X-ray diffraction(XRD),scanning electron microscopy(SEM),photoluminescence(PL)and UV–Vis spectroscopies,colorimetric coordinates,and Raman *** the temperature,successive exothermic reactions were observed and they are related with thermal decomposition of the organic *** stability was reached at^700℃.The material is verified to become completely free of second phase at^800℃.The end Ni WO4 powders showed an intense charge transfer(CT)-related tail centered in the ultraviolet region,resulting in a yellow *** addition,the powders exhibited broad excitation band and broad deep blue–green emission band,which were enhanced with increasing powders’crystallinity.

关键词： nickel tungstate yellow pigment colorimetric coordinate optical property structural characterization

Biological and chemical attributes of soils under forest species in Northeast Brazil

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2020年第5期31卷 1959-1973页

作者： Olmar Baller Weber Maria Catia Barroso da Silva Cristiane Figueira da Silva Joao alencar de Sousa Carlos Alberto Kenji Taniguch Deborah dos Santos Garruti Ricardo Espindola Romero Embrapa Tropical Agroindustry Rua Dra.Sara Mesquita2270PiciFortalezaCeara60511-110Brazil Centro de Ciencias e Tecnologia Universidade Estadual do CearaAv.Dr.Silas Munguba1700Campus do ItaperiFortaleza 60740-000Brazil Universidade Federal Rural do Rio de Janeiro BR 465Km 7SeropedicaRio De Janeiro 23890-000Brazil Depto Ciencia do Solo Universidade Federal do CearaCampus do PiciFortaleza 60021-970Brazil

Timber forests contribute to the sustainable development of the biomes in tropical *** aim of this study was to evaluate the biological and chemical properties of the soil as a consequence of the cover with native and non-native species in the Acarau basin,a transition area from the coast to the Brazilian semi-arid *** planted with four native species(Anadenanthera colubrina,Astronium fraxinifolium,Handroanthus impetiginosus,Colubrina glandulosa)and three exotic species(Acacia mangium,Casuarina equisetifolia,Eucalyptus urophylla)plus a non-forested agricultural area were evaluated for organic carbon contents,and microbial and chemical soil *** levels of soil organic carbon were highest in *** and *** *** basal soil respiration was observed but the microbial biomass was particularly low in the non-forested *** the ***,***,and *** plantations,elevated soil metabolic quotients were *** *** and *** plantations had the highest levels of easily extracted-glomalin related soil *** species affect concentrations of essential nutrients and the biological quality of the soil in different *** can also improve the biological and chemical properties of the soil in the coastal plains of tropical regions.

关键词： Soil quality Brazilian timber species Eucalyptus Acacia Casuarina

Chemical profile and antimicrobial activity of Secondatia floribunda A. DC(Apocynaceae)

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2017年第8期7卷 739-749页

作者： Daiany Alves Ribeiro Sarah Soares Damasceno Aline Augusti Boligon Irwin Rose alencar de Menezes Marta Maria de Almeida Souza JoséGalberto Martins da Costa Programa de Pós-Graduacao em Etnobiologia e Conservacao da Natureza Universidade Regional do Cariri Departamento de Química Biológica Laboratório de Pesquisas de Produtos NaturaisUniversidade Regional do Cariri Laboratório de Fitoquímica Universidade Federal de Santa Maria Departamento de Química Biológica Laboratório de Farmacologia e Química MolecularUniversidade Regional do Cariri Departamento de Ciências Biológicas Laboratório de Ecologia VegetalUniversidade Regional do Cariri

To establish the chemical profile, and to evaluate the antibacterial and modulatory activity of the ethanolic extracts of the stalk’s inner bark and heartwood of Secondatia *** of total phenols and flavonoids was determined by the Folin-Ciocalteu method and aluminum chloride, respectively. Phenolic compounds were identified and quantified by HPLC-DAD (High Performance Liquid Chromatography-Diodearray Detector) and the Infrared Spectroscopy was performed using the measure by Attenuated Total Reflectance with Fourier Transform (ATR-FTIR). Antibacterial assays for determination of the Minimum Inhibitory Concentration (MIC) and modification of aminoglycosides were performed by *** spectra showed similar characteristics, having among its main absorption bands hydroxyl group (OH). The antibacterial activity showed clinically significant results for the strains of Staphylococcus aureus and Escherichia coli. In modulation assay, synergic and antagonistic effect for both extracts was observed. Heartwood extract in combination with antibiotics showed a significant MIC reduction at 19.8% (P < 0.000 1)-79.3% (P < 0.01).ConclusionsThis study is the first report of chemical and biological information of Secondatia floribunda suggesting that it is clinically relevant source of a new antibacterial therapy, especially due to the presence of significant levels of phenolic compounds.

关键词： Chemical composition HPLC Cinchonain Natural product Modification resistance