检索结果-南通市图书馆

Performance of Geometric Multigrid Method for Two-Dimensional Burgers’Equations with Non-Orthogonal,Structured Curvilinear Grids

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2020年第12期125卷 1061-1081页

作者： Daiane cristina Zanatta Luciano Kiyoshi Araki Marcio Augusto Villela pinto Diego Fernando Moro State University of Centro-Oeste IratiBrazil Federal University of Parana Department of Mechanical EngineeringCuritibaBrazil Positivo University CuritibaBrazil

This paper seeks to develop an efficient multigrid algorithm for solving the Burgers problem with the use of non-orthogonal structured curvilinear grids in L-shaped *** this,the differential equations were discretized by Finite Volume Method(FVM)with second-order approximation scheme and deferred ***,the algebraic method and the differential method were used to generate the non-orthogonal structured curvilinear ***,the influence of some parameters of geometric multigrid method,as well as lexicographical Gauss–Seidel(Lex-GS),η-line Gauss–Seidel(η-line-GS),Modified Strongly Implicit(MSI)and modified incomplete LU decomposition(MILU)solvers on the Central Processing Unit(CPU)time was ***,several parameters of multigrid method and solvers were tested for the problem,with the use of nonorthogonal structured curvilinear grids and multigrid method,resulting in an algorithm with the combination that achieved the best results and CPU *** geometric multigrid method with Full Approximation Scheme(FAS),V-cycle and standard coarsening ratio for this problem were *** article shows how to calculate the coordinates transformation metrics in the coarser *** show that the MSI and MILU solvers are the most ***,theMSI solver is faster thanMILU for both grids generators;and the solutions are more accurate for the Burgers problem with grids generated using elliptic equations.

关键词： Computational fluid dynamics finite volume method Burgers’equation geometric multigrid non-orthogonal curvilinear grids

The ecological performance of metallophyte plants thriving in geochemical islands is explained by the Inclusive Niche Hypothesis

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 Plant Ecology 2015年第1期8卷 41-50页

作者： Helena C.Serrano cristina Antunes Manuel J.pinto cristina Máguas Maria Amélia Martins-Loução cristina Branquinho Centro de Biologia Ambiental Faculdade de CiênciasUniversidade de LisboaCampo Grande1749-016 LisboaPortugal Jardim Botânico do Museu Nacional de História Natural e da Ciência Universidade de LisboaR.Escola Politécnica 581250-102 LisboaPortugal

Aims The Inclusive Niche Hypothesis has not been validated for plants using ecophysiological *** few experiments have measured growth and competition but not the physiological response of plants.A metallophyte plant that hyperaccumulates aluminium(Al),Plantago almogravensis,showed a defined spa-tial distribution by occurring mostly on vegetation gaps associ-ated with metalliferous areas(geochemical islands).This case was used to determine,in situ,whether the Inclusive Niche Hypothesis was suitable to explain the extent of the species real-ized *** The vegetation associated with *** geochemical islands in the SW coast of Portugal was *** biotic(neighbouring plants)and abiotic(edaphic)components of the niche were cor-related with parameters of the plant’s ecological and physiological performances(plant density and cover;leaf C and N concentration and isotopic composition;growth).The results were obtained using image analysis,abundance and morphological measures,isotopic signatures and chemical *** Findings The species showed better physiological performance where its ecological performance was lower due to trade-offs with environ-mental *** species’realized niche was mostly limited by shrub competition and soil *** limits contribute to explain the rarity status of the species:the species has a poor capacity to compete but,due to an enhanced Al-tolerance and Al-hyperaccumulator trait,has the ability to find refuge in geochem-ical islands that are too harsh for most other *** work,based on ecophysiological field studies,provides support for the Inclusive Niche Hypothesis relating to plant species.

关键词： competition ecophysiology edaphic endemism hyperaccumulation stable isotopes trade-off

Mindfulness interventions during pregnancy:A narrative review

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 Integrative Medicine 2020年第6期18卷 470-477页

作者： Leandro Lucena cristina Frange Ana Claudia Amorim pinto Monica Levy Andersen Sergio Tufik Helena Hachul Department of Psychobiology Universidade Federal de Sao Paulo(UNIFESP)Sao Paulo 04023062Brazil Department of Neurology and Neurosurgery Universidade Federal de Sao Paulo(UNIFESP)Sao Paulo 04039002Brazil Department of Gynecology Universidade Federal de Sao Paulo(UNIFESP)Sao Paulo 04024002Brazil

Pregnancy is a period of major transformations in a woman’s life;increased stress,and mood and sleep disorders are *** review evaluates mindfulness interventions during pregnancy and their ability to help manage stress,anxiety,depression,emotional regulation,level of mindfulness and sleep quality.A search of English language scientific literature relevant to mindfulness interventions for pregnant women was conducted using PubMed,Scopus and Web of Science,without restriction on publication *** criteria were randomized clinical trials with pregnant women,using mindfulness as an intervention for at least three weeks,in one of our main areas of interest,and using only validated scales to measure *** hundred and thirty studies were identified in our searches of research databases,and thirteen were included in our *** found a large diversity of mindfulness programs,heterogeneity among the instruments used to evaluate outcomes,and inconsistency in the gestational periods used in the *** interventions were beneficial for stress,anxiety and *** was also effective when applied in pregnant women with a history of depression or experiencing *** emotional regulation and the level of mindfulness,there were signs of improvement,but more studies are *** of the studies evaluated sleep *** review provides information about current mindfulness programs,an overview of the effects of mindfulness interventions,a description of the measurements used so far,and recommendations for developing highquality mindfulness protocols for pregnant women.

关键词： Mindfulness Pregnancy Anxiety Stress Depression Sleep

Effect of climate and altitude on plant community composition and richness in Brazilian inselbergs

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 Mountain Science 2020年第8期17卷 1931-1941页

作者： Herval Vieira pinto-JUNIOR Pedro Manuel VILLA Luis Fernando Tavares de MENEZES Miriam cristina Alvarez PEREIRA Universidade Federal de Vigosa Department of Plant BiologyLaboratory of Ecology and Evolution of Plants36570-900Vicosa-MGBrazil Universidade Federal de Vigosa Department of Forest EngineeringLaboratory of Forest Restoration36570-900Vicosa-MGBrazil Universidade Federal do Espirito Santo Department of Agrarian and Biological SciencesLaboratory of Ecology of Restinga and Mata Atlantica29932-900Sao Mateus-ESBrazil Universidade Federal do Espirito Santo Department of Biology29500-000Alegre-ESBrazil

Plant communities are shaped by multiple factors along environmental gradients;however,studies are limited on how environmental filtering drives community composition and species richness on tropical *** evaluate the influence of altitude and climatic variables related to temperature and precipitation on plant community composition and species richness on Brazilian *** assume as a premise that both climate and altitude would induce changes on plant community composition and species richness at the local *** used plant inventory data from 370 sampling units across four inselberg sites in the Atlantic Forest of Espírito Santo State,south-eastern *** tested the univariate and multivariate effects of altitude and climate variables on community composition and species richness with multiple *** in species richness between inselbergs were evaluated using sample-based data to estimate rarefaction and extrapolation *** addition,differences in species composition and taxonomic beta diversity were examined via novel frequency-based metrics.A contrasting climate pattern was observed between the inselberg sites,with south sites being wet compared to the dry conditions found in northern *** richness by rarefaction showed a similar pattern within regional sites;however,there were marked differences between *** richness and beta diversity showed significant differences among sites,with higher values in southern sites than in northern *** a multi-model comparison between inselberg sites,altitude significantly influenced community composition and species richness and explained more variance than climate *** finding suggested that climate could act to some extent on these tropical inselbergs;however,altitude was a better predictor of plant community composition and species richness at the local level.

关键词： Atlantic Forest Biome Beta diversity Abiotic filtering Climate models Environmental filtering Latitudinal gradient

“Love Is Strong, and You＇re so Sweet”： JAGGER Is Essential for Persistent Synergid Degeneration and Polytubey Block in Arabidopsis thaliana

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

Molecular Plant 2016年第4期9卷 601-614页

作者： Ana Marta Pereira Margarida Sofia Nobre Sara cristina pinto Ana Lucia Lopes Mario Luis Costa Simona Masiero Silvia Coimbra Departamento de Biologia Faculdade de Ciencias da Universidade do Porto Rua do Campo Alegre 4169-007 Porto Portugal Plant Functional Genomics Group Biosystems and Integrative Sciences Institute (BiolSI) 4169-007 Porto Portugal Dipartimento di BioScienze Universita degli Studi di Milano 20133 Milan Italy Present address: Institute of Plant Biology and ZUrich-Basel Plant Science Center University of ZUrich Zolikerstrasse 107 8008 Zurich Switzerland

Successful double fertilization and subsequent seed development in flowering plants requires the delivery of two sperm cells, transported by a pollen tube, into the embryo sac of an ovule. The embryo sac cells tightly control synergid cell death, and as a result the polyspermy block. Arabinogalactan proteins are highly glycosylated proteins thought to be involved in several steps of the reproductive process. We show that JAGGER, Arabinogalactan Protein 4, is an important molecule necessary to prevent the growth of multiple pollen tubes into one embryo sac in Arabidopsis thaliana. In jagger, an AGP4 knockout mutant, the pistils show impaired pollen tube blockage as a consequence of the survival of the persistent synergid. JAGGER seems to be involved in the signaling pathway that leads to a blockage of pollen tube attraction. Our results shed light on the mechanism responsible for preventing polyspermy in Arabidopsis and for safe- guarding successful fertilization of all ovules in one pistil, ensuring seed set and the next generation.

关键词： Polytubey persistent synergid arabinogalactan proteins polyspermy

In-vitro gastrointestinal digestion of functional cookies enriched with chestnut shells extract:Effects on phenolic composition,bioaccessibility,bioactivity,andα-amylase inhibition

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food Bioscience 2023年第3期53卷 3087-3100页

作者： Diana pinto Manuela M.Moreira Jaroslava Svarc-Gajic Anna Vallverdú-Queralt Tanja Brezo-Borjan cristina Delerue-Matos Francisca Rodrigues REQUIMTE/LAQV ISEPPolytechnic of PortoRua Dr.António Bernardino de Almeida4249-015PortoPortugal Faculty of Technology University of Novi SadBulevar cara Lazara 121000Novi SadSerbia Nutrition Food Science and Gastronomy DepartmentSchool of Pharmacy and Food ScienceUniversity of BarcelonaBarcelonaSpain Consorcio CIBER M.P.Fisiopatología de la Obesidad y la Nutrición(CIBERObn)Instituto de Salud CarlosⅢ(ISCⅢ)MadridSpain

Chestnut(Castanea sativa)shells(CS)are an appealing source of *** previous studies,the research team validated a nutraceutical extract from CS,recovered by an eco-friendly technology,by in-vitro and in-vivo assays,and developed functional cookies enriched with this *** study attempts,for the first time,to investigate the impact of the in-vitro gastrointestinal digestion in the phenolic composition,bioaccessibility,antioxidant/antiradical properties,andα-amylase inhibition of CS extract-enriched *** outcomes revealed higher polyphenols concentrations retained after intestinal digestion,endorsing its better antioxidant,antiradical,and hypoglycemic *** phenolics recovery enhanced in the following order:oral

关键词： Castanea sativa Antioxidants Functional food In-vitro simulated digestion Pro-healthy benefits

Posterior corneal astigmatism modifications after cataract surgery and its role on total corneal astigmatism

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Annals of Eye Science 2018年第1期3卷 267-275页

作者： Diana Silva Mafalda Mota Catarina Pedrosa Peter Pêgo Sara pinto cristina Vendrell Isabel Prieto Ophthalmology Department Hospital Prof.Dr.Fernando Fonseca E.P.E.AmadoraPortugal

Background:In recent years posterior corneal astigmatism and its effect on total corneal astigmatism has been studied,with research showing that this can impact total *** study aims to ascertain if there is significant change in the posterior corneal astigmatism after cataract surgery and its impact on the total ***:Analysis of 76 eyes that underwent cataract surgery with monofocal intraocular lens *** topography was performed with Pentacam(OCULUS®)pre-and *** corneal astigmatism was calculated with the algorithm of vergence *** compared preoperative and postoperative changes in the magnitude and axis differences of anterior corneal curvature astigmatism,posterior corneal curvature astigmatism and the calculated total corneal *** calculated the correlation between the total preoperative astigmatism and the difference between total corneal astigmatism and anterior corneal ***:The mean preoperative and postoperative posterior astigmatism was 0.31±0.02 D,showing no significant differences before and after surgery(P=0.989).Statistically significant differences between the calculated total corneal astigmatism and anterior corneal astigmatism were registered preoperatively and postoperatively in the with-the-rule anterior(WTR)corneal astigmatism(P=0.004,P<0.0001);against-the-rule(ATR)anterior corneal astigmatism(P<0.0001,P<0.0001)and in the oblique(P=0.026,P=0.019)*** posterior corneal astigmatism and the total corneal astigmatism correlated positively with the differences between the total corneal and anterior corneal astigmatism(R=0.378,P=0.001).Conclusions:There were statistically significant differences between the magnitude of the total astigmatism and anterior corneal astigmatism,underlining the impact of posterior corneal astigmatism.A positive correlation between the preoperative posterior astigmatism and the difference between the total corneal and the ant

关键词： Astigmatism cataract surgery intraocular lens posterior corneal curvature total corneal astigmatism

Biochar influences the cane fields’microbiota and the development of pre-sprouted sugarcane seedlings

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Waste Disposal and Sustainable Energy 2023年第1期5卷 75-88页

作者： Bruna cristina pinto Adriana Barboza Alves Osania Emerenciano Ferreira Gustavo Henrique Gravatim Costa Magno Andréde Oliveira Augusto Cesar da Silva Bezerra Alan Rodrigues Teixeira Machado Postgraduate Program in Environmental Sciences State University of Minas GeraisFrutal UnityFrutalMinas Gerais38202-436Brazil Department of Agricultural and Biological Sciences State University of Minas GeraisFrutal UnityFrutalMinas Gerais38208-436Brazil Postgraduate Program in Geotechnical Engineering Federal University of Ouro PretoOuro PretoMinas Gerais35400-000Brazil Department of Transport Engineering Federal Center for Technological Education of Minas GeraisBelo HorizonteMinas Gerais30421-169Brazil Department of Exact Sciences State University of Minas GeraisJoão Monlevade UnityJoão MonlevadeMinas Gerais35930-314Brazil

This research investigates the soil conditioning effect of sugar cane fields with biochar produced from sugarcane *** influence on the physicochemical and microbiological conditions of the soil and the agronomic performance of sugarcane seedlings was *** this end,the biochar from sugarcane bagasse was produced by pyrolysis in a double drum oven and mixed with soil at rates of 0,1%,3%,and 5%(in weight).The experiment was installed in a greenhouse with two evaluation periods(30 days and 60 days)and five *** pot received a pre-sprouted cane seedling,and the analysis of colony-forming units(bacteria and fungi),physicochemical characteristics of the soil,and growth and development of sugarcane were performed per *** biochar showed a high fixed carbon content(72%)and a specific surface area estimated by the adsorption of methylene blue of 50 m2 g−***,its structure is porous and contains important nutrients(e.g.,CaO,K2O,and P2O5).In the periods evaluated,the applications of the 3%and 5%(in weight)rates of biochar reduced most of the soil fertility ***,the chemical analyses indicated that the sugarcane field soil collected already possessed high *** microbiota was influenced,but only the application of the 3%(in weight)rate at 60 days after planting showed a significant positive effect on the number of bacteria forming units,with an increase of approximately 385%.On the other hand,no significant positive effect on sugarcane development was ***,biochar application in high-fertility sugarcane plantation soil did not result in gains for sugarcane development in the periods evaluated.

关键词： Soil Biometry Microbiology Double drum oven Biochar

A Holistic Model for the Development of Entrepreneurial Competencies of the Entrepreneur XXI： The Tree Model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Business Review 2012年第3期11卷 309-321页

作者： Jose Luis Soares Ferreira cristina Maria pinto Albuquerque Tree Institute Lisbon Portugal University of Coimbra Coimbra Portugal

In the present article it will be critically questioned the traditional entrepreneurship education approaches based on a narrow conception of competency, and their values. Assuming the perspective that to be an entrepreneur is basically an attitude towards life and the world, there proposed holistic, constructivist and experiential processes and strategies for entrepreneurship education. The ＂entrepreneur XXI＂, must be able to undertake a social function of change, so, an economical and social development more human, ethical and intelligent. Under this assumption, the ＂Tree Model for the Development of Entrepreneurial Competencies＂, that will be discussed globally in the second part of this article, suggests a dynamic and experiential approach ofentrepreneurship education based on the qualification of people＇s behaviour, self-esteem, competencies and experiences; a profile of key behavioural and performance competencies （root）, experimental pedagogical procedures （trunk） and real results within group projects （fruits）. This model has been developed during the last decade （2001-2011）, using a multidisciplinary research-action procedure, within business, education （at different teaching levels） and social project environments.

关键词： entrepreneurship education competency tree model entrepreneur XXI