检索结果-南通市图书馆

A Non-Destructive Time Series Model for the Estimation of Cherry Coffee Production

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第3期70卷 4725-4743页

作者： Jhonn Pablo Rodríguez david Griol Zoraida Callejas juan Carlos Corrales Telematics Engineering Group University of CaucaPopayán190002Colombia INRAE University of ToulouseUMR 1248 AGIRF-31326Castanet TolosanFrance Department of Software Engineering University of GranadaGranada18071Spain

Coffee plays a key role in the generation of rural employment in *** than 785,000 workers are directly employed in this activity,which represents the 26%of all jobs in the agricultural *** coffee growers estimate the production of cherry coffee with the main aim of planning the required activities,and resources(number of workers,required infrastructures),anticipating negotiations,estimating,price,and foreseeing losses of coffee production in a specific *** important processes can be affected by several factors that are not easy to predict(e.g.,weather variability,diseases,or plagues.).In this paper,we propose a non-destructive time series model,based on weather and crop management information,that estimate coffee production allowing coffee growers to improve their management of agricultural activities such as flowering calendars,harvesting seasons,definition of irrigation methods,nutrition calendars,and programming the times of concentration of production to define the amount of personnel needed for *** combination of time series and machine learning algorithms based on regression trees(XGBOOST,TR and RF)provides very positive results for the test dataset collected in real conditions for more than a *** best results were obtained by the XGBOOST model(MAE=0.03;RMSE=0.01),and a difference of approximately 0.57%absolute to the main harvest of 2018.

关键词： Cherry coffee production estimation learner approaches time series weather data crop management data

Pancreatic pseudocyst drainage guided by endoscopic ultrasound

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 Gastrointestinal Endoscopy 2010年第6期2卷 193-197页

作者： juan J Vila david Carral Ignacio Fernández-Urien Endoscopy Unit Gastroenterology DepartmentHospital de Navarra Endoscopy Unit Gastroenterology DepmentComplejo Hospitalario Xeral-Calde

Pancreatic pseudocysts can be managed conservatively in the majority of patients but some of them will require surgical,endoscopic or percutaneous drainage. Endoscopic drainage represents an efficient modality of drainage with a high resolution rate and lower morbidity and mortality than the surgical or percutaneous *** this article we review the endoscopic pseudocyst drainage procedure with special emphasis on technical details.

关键词： Endosonography Pancreatic pseudocyst Drainage Endoscopy Digestive system Therapeutics

Bigger or long-winged male common crossbills exhibit redder carotenoid-based plumage coloration

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2023年第2期69卷 165-172页

作者： Blanca Fernandez-Eslava Daniel Alonso david Galicia juan Arizaga Carlos Alonso-Alvarez Biologia Ambiental Universidad de NavarraFacultad de CienciasC/Irunlarrea1 Pamplona31008 NavarraSpain Ornitologia Sociedad de Ciencias de AranzadiZorroagagaina 1120014 DonostiaSan SebastianSpain Ecologia Evolutiva Museo Nacional de Ciencias Naturales(CSiC)Edificio Pinar 2528006 MadridSpain

Carotenoid-based ornaments are often considered reliable(honest)individual condition signals because their expression implies physiological costs unaffordable for low-quality animals(handicap signals).Recently,it has been suggested that efficient cell respiration is mandatory for producing red ketocarotenoids from dietary yellow *** implies that red colorations should be entirely unfalsifiable and independent of expression costs(index signals).In a precedent study,male common crossbills,Loxia curvirostra,showing a red plumage reported higher apparent survival than those showing yellowish-orange *** plumage redness in this species is due to ketocarotenoid accumulation in ***,we correlated the male plumage redness(a 4-level visual score:yellow,patchy,orange,and red)and the body morphology in more than 1,ooo adult crossbills captured in 3 Iberian localities to infer the mechanisms responsible for color evolution.A principal component analysis summarized morphometry of 10 variables(beak,wing,tarsus length,etc.).The overall body size(PC1)and the length of flight feathers regarding body size(Pc3)showed significant positive relationships with plumage *** redness was barely correlated with bill shape measures,suggesting no constraint in acquiring carotenoids from pine ***,large body sizes or proportionally long flying feathers could help carotenoid acquisition via social competition or increased foraging *** longer flight feathers might also be associated with a specific cell respiration profile that would simultaneously favor flying capacities and enzymatic transformations needed for ketocarotenoid *** a phenotypic profile would agree with the hypothesis of ketocarotenoid-based colors acting as individual quality index signals.

关键词： avian carotenoids color and biometrics Loxia genus Mediterranean crossbills resource allocation trade-offs shared pathway hypothesis

Subclinical cardiovascular disease in type 2 diabetes mellitus: To screen or not to screen

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 2014年第9期2卷 415-421页

作者： juan J Chillarón juana A Flores-Le Roux david Benaiges juan Pedro-Botet Department of Endocrinology and Nutrition Hospital del Mar Passeig Marítim 25-29 08003 Barcelona Spain Institut Municipal d'Investigacions Mèdiques Passeig Marítim 25-29 08003 Barcelona Spain Departament de Medicina Universitat Autònoma de Barcelona 08193 Cerdanyola (NOT Sarda?ola) del Vallés Barcelona Spain

The prevalence of type 2 diabetes mellitus(T2DM) has risen in recent decades, and cardiovascular disease remains the leading cause of death in this population. Several clinical trials have demonstrated the benefit of tight control of risk factors on the incidence and mortality of cardiovascular disease. However, in clinical practice, few patients achieve the therapeutic goals. The current diagnostic procedures for subclinical cardiovascular disease in T2 DM patients have not been shown to improve prognosis or mortality, probably because they do not categorize cardiovascular risk. Thus, clinical practice guidelines do not systematically recommend screening for subclinical atherosclerosis in these patients, although it is known that patients with extracoronary atherosclerosis, microangiopathy and poorlycontrolled cardiovascular risk factors are at high risk for cardiovascular disease. Improvements in the reliability of diagnostic tests, with fewer side effects and better cost efficiency, may better help to stratify cardiovascular risk in this group of patients, and further evaluation on this topic should be considered.

关键词： Cardiovascular disease Type 2 diabetes mellitus Cardiovascular risk

BASKETBALL SCORING IN NBA GAMES:AN EXAMPLE OF COMPLEXITY

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 Systems Science & Complexity 2013年第1期26卷 94-103页

作者： DE SA GUERRA Yves MARTíN GONZALEZ juan Manuel SARMIENTO MONTESDEOCA Samuel RODRIGUEZ RUIZ david ARJONILLA LóPEZ Nieves GARCíA-MANSO juan Manuel Departament of Phisical Education University of Las Palmas de Gran Canaria Departament of Physics University of Las Palmas de Gran Canaria

Scoring in a basketball game is a highly dynamic, non-linear process. NBA teams try to be more and more competitive each season. For instance, they incorporate into their rosters the best players in the world. This and other mechanisms concur to make the scoring process in NBA games exciting and rarely predictable. This paper is to study the behavior of timing and scoring in basketball gaines. The authors analyze all the games in five NBA regular seasons （2005-06, 2006-07, 2007-08, 2008-09, 2009-10）, for a total of 6150 games. Scoring does not behave uniformly; therefore, the authors also analyze the distributions of the differences in points in the basketball games. To further analyze the behavior of the tail of the distribution, the authors also carry out a semilog-plot and a log-log plot to verify whether this trend approaches a Poisson distribution or a PL. This paper reveals different areas of behavior related to the score, with specific instances of time that could be considered tipping points of the game. The presence of these critical points suggests that there are phase transitions where the dynamic scoring of the games varies significantly.

关键词： Complexity NBA non-linear Poisson power law.

Tourism dependence and poverty alleviation thresholds in Chinese ethnic tourism

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2022年第10期19卷 3026-3036页

作者： LI Ya-juan OUYANG Chen-xing ZHOU Sheng-yu YU Hu KNIGHT W david Wuhan Branch of China Tourism Academy Central China Normal UniversityWuhan 430079China College of Urban and Environmental Science Central China Normal UniversityWuhan 430079China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China Department of Human Dimensions of Natural Resources Colorado State UniversityFort Collins 80523USA

Questions persist on the relationship between tourism dependence and economic growth in ethnic tourism *** study addresses such gaps by constructing a threshold regression model based on socio-economic data from 2006 to 2019 for nine sites in Enshi Prefecture of central *** GIS and other open-source data were also used to visualize changing tourism resources in the *** suggest that tourism dependence(the ratio of tourism-based GDP to overall GDP)significantly promotes economic growth in ethnic minority ***,the positive influence of tourism dependence on economic growth appears dynamic and non-linear–rising at first before falling when tourism dependence exceeded a threshold of 34%,with effects varying by site and *** and findings make crucial theoretical contributions to understanding tourism dependence and poverty alleviation *** paper also highlights the importance of political support and balanced investment in diverse industries to minimize decreasing returns beyond tourism dependence thresholds in destinations worldwide.

关键词： Ethnic tourism Tourism dependence Economic growth Threshold effects Poverty alleviation Threshold regression model

Bacterial extracts and bioformulates as a promising control of fruit body rot and root rot in avocado cv. Hass

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2020年第3期19卷 748-758页

作者： david GRANADA Lorena LÓPEZ-LUJAN Sara RAMIREZ-RESTREPO juan MORALES Carlos PELÁEZ-JARAMILLO Galdino ANDRADE juan Carlos BEDOYA-PEREZ Phytosanitary and Biological Control Unit Corporation for Biological ResearchMedellin 050034Colombia Faculty of Health Sciences Institution University Colegio Mayor de AntioquiaMedellin 050034Colombia Department of Agronomic Sciences National University of ColombiaMedellin 050034Colombia Faculty of Exact Sciences University of AntioquiaMedellin 050010Colombia Department of Microbiology Londrina State UniversityLondrina 86051-990Brazil

At least 20-40% of annual losses of avocado crops are caused by pathogenic *** chemical treatments of these diseases are inefficient,cause environmental pollution and are increasingly restricted by international *** work aimed to assess the biocontrol capacity of a bacterial extract to protect avocado fruits and plants from pathogen *** from the bacterial isolate Serratia ***5.1 were obtained from liquid fermentations in a biorreactor.A body rot postharvest infection model with Colletotrichum gloeosporioides on fruits was ***,packaging conditions were simulated using the bacterial extract and the commercial fungicide prochloraz as a positive ***,seedlings infections with Phytophthora cinnamomi were performed on two types of avocado(West Indian race and ***).The Area Under Disease Progress Curve(AUDPC) was recorded using the bacterial extract and a commercial product with fosetyl-aluminium as *** bacterial extract significantly reduced infections by *** on injured avocado fruits at 31.1 μg mL^-*** fruits were also protected against body rot infections at the same concentration and showed no significant differences with the commercial *** the other hand,AUDPC in the seedlings was significantly reduced with the extract treatment at 3 μg mL^-1 compared to the ***,a possible phytotoxicity effect of the extract was evidenced in the seedlings and confirmed by pathogen recovery and tests on Raphanus sativus ***,formulations of the extracts(emulsion and emulsifiable concentrate) were prepared,and bioactive stability was assessed for 8 *** emulsion formulates demonstrated very stable bioactivity against *** extract and the emulsion formulate showed promising results for the control of avocado *** bioproducts based on this type of active principles could be developed for the benefit of avocado industry.

关键词： Colletotrichum gloeosporioides Phytophthora cinnamomi Serratia sp. antagonistic microbes secondary metabolites biofungicide

Recent Near-surface Temperature Trends in the Antarctic Peninsula from Observed,Reanalysis and Regional Climate Model Data

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2020年第5期37卷 477-493页

作者： Deniz BOZKURT david HBROMWICH Jorge CARRASCO Keith MHINES juan Carlos MAUREIRA and Roberto RONDANELLI Department of Meteorology University of ValparaísoValparaíso 2340000Chile Center for Climate and Resilience Research(CR)2 Santiago 8320000Chile Polar Meteorology Group Byrd Polar and Climate Research CenterThe Ohio State UniversityColumbusOH 43210USA Centro de Investigacion GAIA Antártica Universidad de MagallanesPunta Arenas 6200000Chile Center for Mathematical Modeling(CMM) University of ChileSantiago 8320000Chile Department of Geophysics University of ChileSantiago 8320000Chile

This study investigates the recent near-surface temperature trends over the Antarctic *** make use of available surface observations,ECMWF’s ERA5 and its predecessor ERA-Interim,as well as numerical simulations,allowing us to contrast different data *** use hindcast simulations performed with Polar-WRF over the Antarctic Peninsula on a nested domain configuration at 45 km(PWRF-45)and 15 km(PWRF-15)spatial resolutions for the period 1991?*** addition,we include hindcast simulations of KNMI-RACMO21P obtained from the CORDEX-Antarctica domain(~50 km)for further *** show that there is a marked windward warming trend except during *** windward warming trend is particularly notable in the autumn season and likely to be associated with the recent deepening of the Amundsen/Bellingshausen Sea low and warm advection towards the Antarctic *** the other hand,an overall summer cooling is characterized by the strengthening of the Weddell Sea low as well as an anticyclonic trend over the Amundsen Sea accompanied by northward *** persistent cooling trend observed at the Larsen Ice Shelf station is not captured by ERA-Interim,whereas hindcast simulations indicate that there is a clear pattern of windward warming and leeward ***,larger temporal correlations and lower differences exhibited by PWRF-15 illustrate the existence of the added value in the higher spatial resolution simulation.

关键词： dynamical downscaling cloud computing added value reanalysis Amundsen/Bellingshausen Sea Weddell Sea temperature trend

Effects of fire history on animal communities:a systematic review

在线全文

学校读者我要写书评

暂无评论

Ecological Processes 2022年第1期11卷 248-258页

作者： Tania Marisol González juan david González‑Trujillo Alberto Muñoz Dolors Armenteras Laboratorio de Ecología del Paisaje y Modelación de Ecosistemas ECOL‑MOD Departamento de BiologíaFacultad de CienciasUniversidad Nacional de ColombiaEdificio 421111321 BogotáColombia Departamento de Biología Facultad de CienciasUniversidad Nacional de ColombiaEdificio 421111321 BogotáColombia Departamento de Didáctica de Ciencias Experimentales Sociales y MatemáticasFacultad de EducaciónUniversidad Complutense de Madrid28040 MadridSpain CREAF 08193 Cerdanyola del VallèsCataloniaSpain

Fire is a natural agent with a paramount role in ecosystem functioning and biodiversity ***,it can also act as a negative force against many *** some knowledge of the interactions of fire and vegetation,there is no clear understanding of how different components of fire regimes(i.e.,severity,history,or frequency)influence known patterns of animal ***,we performed a systematic review on the global responses of arthropods,birds,mammals,reptiles,and amphibians to different fire ***,we focused on assessing how fire severity,history,and frequency modulate the effect of fire on the richness and abundance of faunal *** conducted a systematic review of 566 papers retrieved from the Scopus *** also scrutinized all the documents included in the meta‑analysis of Pastro et al.(Pastro et *** Ecol Biogeogr 23:1146–1156,2014).Our selection criteria excluded studies without data on species richness or *** also excluded studies without adequate controls and those without information about the fire regime of the study *** careful examination,we used data from 162 studies to perform a quantitative meta‑*** the 162 studies meeting our selection criteria,nearly 60%of the studies are from North America,25%from Australia,11%from Europe,and 4%from the *** to the ecological role of fire,90%of the studies were carried out in fire‑dependent ecosystems(i.e.,conifer forests,natural savannas,pastures).Finally,40%of the studies analyzed birds,22%mammals,and 20%*** meta‑analysis of the available evidence indicates that fire history is an important modulator of animal richness and *** negative or positive,animal responses depended on the time since the last fire *** that short‑term studies may not capture such a long‑term effect on fauna,this translates to more challenges at implementing fire management *** or not we can

关键词： Amphibians Arthropods Birds Fire regime components Mammals Reptiles