检索结果-南通市图书馆

Improving automatic climate control with decision support techniques to minimize disease effects in greenhouse tomatoes

在线全文

学校读者我要写书评

暂无评论

Information Processing in Agriculture 2017年第1期4卷 50-63页

作者： Joaquın Canadas Jorge antonio sanchez-Molina Francisco Rodrıguez Isabel Marıa del Aguila Department of Informatics University of Almerı´a04120 Almerı´aSpain The Agrifood Campus of International Excellence(ceiA3)Spain

Crop growth in greenhouses is basically determined by the climate variables in the environment and by the amounts of water and fertilizers supplied by *** management of these factors depends on the expertise of agricultural technicians and farmers,usually assisted by control systems installed within the *** this context,decision support features enable us to incorporate invaluable human experience so thatwe can take quick and effective decisions to ensure efficient crop *** work describes a real-time decision support system for greenhouse tomatoes that supports decisions at three stages–the supervision stage identifies climate sensor faults,the control stage maintains climate variables at setpoints,and the strategic stage identifies diseases affecting the crop and changes climate variables accordingly to minimize *** DSS was implemented by integrating a real-time rule-based tool into the control *** results show that the system increases climate control effectiveness,while providing support in preventing diseaseswhich are difficult to *** system was tested by simulating the appearance of the disease and observing the real *** main contribution has been to demonstrate that production rules,which aremature and well-known in the artificial intelligence domain,can act as a shared technology for the whole *** means that fault detection,temperature control and disease monitoring features are not dealt with in isolation.

关键词： Greenhouse crop growth Decision support systems Climate control Disease management

Agricultural cooperatives and the role of organisational models in new intelligent traceability systems and big data analysis

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 Agricultural and Biological Engineering 2017年第5期10卷 115-125页

作者： Cynthia Giagnocavo Fernando Bienvenido Li Ming Zhao Yurong Jorge antonio sanchez-Molina Yang Xinting Cátedra(Chair)Coexphal-UAL of Horticulture Cooperative Studies and Sustainable DevelopmentUniversity of AlmeriaSpain Department of Informatics University of AlmeriaAlmeriaSpain Beijing Research Center for Information Technology in Agriculture/National Engineering Research Center for Information Technology in Agriculture/National Engineering Laboratory for Agri-product Quality Traceability/Key Laboratory for Information Technologies in Agriculture Ministry of AgricultureChina College of Economics and Management Shandong Agricultural UniversityChina

Traceability systems are key to assuring food safety,creating a benefit for food supply chain ***,the appearance of new technologies such as IoT and Big Data Analysis leads to a new generation of more functional,but complex,traceability *** models based on cooperation of multiple small/medium size agents,for example of small/family farming cooperatives,play an important role in high standard agricultural production and commercialization *** function as both social and economic networks,with high social and economic impact in the rural *** case of Almeria as an example of this model was used to analyze its cooperative *** actual traceability systems in the Almeria model were studied,taking account of the different networked agents and their *** study includes two main parts:a)analysis of the net-chains that constitute the food supply chains and their different relationships,and b)actual *** next step studied how the net-chain model,including many diverse agents,may be applied to develop a new generation of traceability systems based of IoT and Big *** implies extending the special and functional scope of the actual systems and defining clear rules of exchange of the results of the Big Data Analysis,taking account of the adequate Privacy *** work analyses the current organisation as a base for a new generation of traceability systems considered in the European project IoF2020(Internet of the Food and Farm 2020).Some parallels between Almeria’s model and certain areas in China,mainly in the areas of Beijing-Tianjin-Hebei and Shandong were *** of the objectives of this work is to deepen the understanding of these similarities and analyze the possible adaptation of the results from Almeria to China.

关键词： food traceability system big data internet of things organisational structure business model agricultural cooperatives net-chains food supply chain

Development and test verification of air temperature model for Chinese solar and Spainish Almeria-type greenhouses

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 Agricultural and Biological Engineering 2017年第4期10卷 66-76页

作者： Jorge antonio sanchez-Molina Li Ming Francisco Rodriguez Jose Luis Guzman Wang Hui Yang Xinting The Automatic Control Robotics and Mechatronics Research GroupDepartment of InformaticsceiA3CIESOLUniversity of AlmeriaAlmeria 04120Spain Beijing Research Center for Information Technology in Agriculture/National Engineering Research Center for Information Technology in Agriculture/National Engineering Laboratory for Agri-product Quality Traceability/Key Laboratory for Information Technologies in Agriculture Ministry of AgricultureBeijing 100097China

Growth can be defined as an increment in biomass or an increment in weight or height of the organs of the plant influenced by physiological *** of these processes have their limits genetically determined,but climate and irrigation play an important *** of its importance,microclimate has been extensively studied in the modeling as a surrounding condition which is imposed by the exterior *** main objective of this work was to develop a temperature model based on the energy balance dynamics at two different greenhouse locations-South-eastern Spain and Northern China,and the traditional structures of Chinese solar greenhouse and Almería-type multi-span greenhouse were taken into *** final model was developed by combining the external conditions,the actuator influence and the crop growth,where the temperature is influenced by soil,crop,cover,actuators,back wall and greenhouse *** model took into account the energy lost by convective and conductive fluxes,as well as the energy supplied by solar radiation and heating *** soil and the back wall are the main media for energy *** temperature dynamic was determined by a physical model,which considered the energy balance from a holistic point of view-as a sub-model for a customizable interface among the external climate,the plant and the greenhouse *** influences of different subsystems included in the temperature model were analyzed and *** results showed a high R^(2)value of 0.94 for Beijing and 0.95 for Almeria,and the average error was low,of which the MAE and RMSE were 0.71 and 1.365 for Almeria and 0.62 and 1.102 for Beijing,***,the model can be considered as a powerful tool for control design purposes in microclimate systems.

关键词： air temperature model Chinese solar greenhouse Spanish Almería-type greenhouse energy balance dynamics microclimate

Prevalence of meeting 24-Hour Movement Guidelines from pre-school to adolescence: A systematic review and meta-analysis including 387,437 participants and 23 countries

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 Sport and Health Science 2022年第4期11卷 427-437页

作者： Miguel Angel Tapia-Serrano Javier Sevil-Serrano Pedro antonio sanchez-Miguel Jose Francisco Lopez-Gil Mark STremblay antonio Garcıa-Hermoso Department of Didactics of Musical Plastic and Body ExpressionFaculty of Teaching TrainingUniversity of ExtremaduraAvenida de la UniversidadS/NCaceres 10071Spain Department of Physical Activity and Sport Faculty of Sport ScienceUniversity of Murcia(UM)San Javier 30720Spain Healthy Active Living and Obesity Research Group Children’s Hospital of Eastern Ontario(CHEO)Research InstituteOttawaON K1H 8L1Canada Navarrabiomed Public University of Navarra(UPNA)Health Research Institute of Navarra(IdiSNA)Navarra Hospital Complex(CHN)Pamplona 310008Spaia

Background:Meeting the 24-Hour Movement Guidelines(physical activity,screen time,and sleep duration) has been associated with positive health ***,there are no previous meta-analyses that have examined the overall adherence to the 24-Hour Movement Guidelines from pre-school to adolescence across the ***,the main purpose of this systematic review and meta-analysis was to examine the overall(non)adherence to the 24-Hour Movement Guidelines among preschoolers,children,and adolescents ***:Four electronic databases(MEDLINE,Scopus,Web of Science,and Cochrane Database of Systematic Reviews) were searched for quantitative studies published in Spanish and English between January 2016 and May *** that were conducted with apparently healthy participants and reported the overall(non)adherence to the 24-Hour Movement Guidelines in preschoolers and/or children and/or adolescents were ***:Sixty-three studies comprising 387,437 individuals(51% girls) aged 3-18 years from 23 countries were ***,7.12%(95%confidence interval(95%CI):6.45%-7.78%) of youth met all three 24-Hour Movement Guidelines,and 19.21%(95%CI:16.73%-21.69%)met none of the 3 *** sex,adherence to all recommendations was significantly lower in girls(3.75%,95%CI:3.23%-4.27%) than in boys(6.89%,95%CI:5.89%-7.89%)(p <0.001).However,there were no sex differences regarding adherence to any of the 3 individual recommendations(girls,15.66%,95%CI:8.40%-22.92%;boys,12.95%,95%CI:6.57%-19.33%).In terms of age group,adherence to the 3 recommendations was 11.26%(95%CI:8.68%-13.84%),10.31%(95%CI:7.49%-13.12%),and 2.68%(95%CI:1.78%-3.58%) in preschoolers,children,and adolescents,***,8.81%(95%CI:5.97%-11.64%) of preschoolers,15.57%(95%CI:11.60%-19.54%) of children,and 28.59%(95%CI:22.42%-34.75%) of adolescents did not meet any of the *** America was the region with the lowest adherence(all:2.93%;none:3

关键词： Exercise Lifestyle Movement behaviors Sedentary behaviors Youth

Unit Root Analysis of Traffic Time Series in Toll Highways

在线全文

学校读者我要写书评

暂无评论

Journal of Civil Engineering and Architecture 2012年第12期6卷 1641-1647页

作者： antonio sanchez Solino antonio L. Lara Galera Construction Department Madrid Polytechnic University Madrid 28040 Spain

Concession contracts in highways often include some kind of clauses （for example, a minimum traffic guarantee） that allow for better management of the business risks. The value of these clauses may be important and should be added to the total value of the concession. However, in these cases, traditional valuation techniques, like the NPV （net present value） of the project, are insufficient. An alternative methodology for the valuation of highway concession is one based on the real options approach. This methodology is generally built on the assumption of the evolution of traffic volume as a GBM （geometric Brownian motion）, which is the hypothesis analyzed in this paper. First, a description of the methodology used for the analysis of the existence of unit roots （i.e., the hypothesis of non-stationarity） is provided. The Dickey-Fuller approach has been used, which is the most common test for this kind of analysis. Then this methodology is applied to perform a statistical analysis of traffic series in Spanish toll highways. For this purpose, data on the AADT （annual average daily traffic） on a set of highways have been used. The period of analysis is around thirty years in most cases. The main outcome of the research is that the hypothesis that traffic volume follows a GBM process in Spanish toll highways cannot be rejected. This result is robust, and therefore it can be used as a starting point for the application of the real options theory to assess toll highway concessions.

关键词： Real options unit root analysis investment highway concession traffic.

Anisotropic gold nanoparticles: Preparation and applications in catalysis

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 Journal of Catalysis 2016年第10期37卷 1619-1650页

作者： Peter Priecel Hammed Adekunle Salami Romen Herrera Padilla Ziyi Zhong Jose antonio Lopez-sanchez 利物浦大学化学系可再生能源斯蒂芬森研究所英国利物浦新加坡科技研究局(A*STAR) 化学与工程科学研究所新加坡裕廊岛627833

Despite the high amount of scientific work dedicated to the gold nanoparticles in catalysis, most of the research has been performed utilising supported nanoparticles obtained by traditional impreg‐nation of gold salts onto a support, co‐precipitation or deposition‐precipitation methods which do not benefit from the recent advances in nanotechnologies. Only more recently, gold catalyst scien‐tists have been exploiting the potential of preforming the metal nanoparticles in a colloidal suspen‐sion before immobilisation with great results in terms of catalytic activity and the morphology con‐trol of mono‐and bimetallic catalysts. On the other hand, the last decade has seen the emergence of more advanced control in gold metal nanoparticle synthesis, resulting in a variety of anisotropic gold nanoparticles with easily accessible new morphologies that offer control over the coordination of surface atoms and the optical properties of the nanoparticles （tunable plasmon band） with im‐mense relevance for catalysis. Such morphologies include nanorods, nanostars, nanoflowers, den‐dritic nanostructures or polyhedral nanoparticles to mention a few. In addition to highlighting newly developed methods and properties of anisotropic gold nanoparticles, in this review we ex‐amine the emerging literature that clearly indicates the often superior catalytic performance and amazing potential of these nanoparticles to transform the field of heterogeneous catalysis by gold by offering potentially higher catalytic performance, control over exposed active sites, robustness and tunability for thermal‐, electro‐and photocatalysis.

关键词： Anisotropic metal nanoparticles Gold nanoparticles Gold catalysis Photocatalysis Electrocatalysis Catalytic oxidation Colloidal gold nanoparticles Gold nanorod Gold nanostars Sol immobilisation

在线全文

学校读者我要写书评

暂无评论

现代各种不同的维修管理(续)

设备管理与维修 2006年第8期 41-42页

作者： Adolfo Crespo Marquez Pedro Moreu De Leon antonio sanchez Herguedas 王秩信

***（1998）也构建了一个维修管理结构，如图2所示，维修管理方法，对每项资产必须从制订o fan战略开始，并允分地与业务计划相结合同时，初期与HR有关的各方面都很重要，并要求在文化方面产生变化一其次，在整个寿命周期内，企业应该... 详细信息

***（1998）也构建了一个维修管理结构，如图2所示，维修管理方法，对每项资产必须从制订o fan战略开始，并允分地与业务计划相结合同时，初期与HR有关的各方面都很重要，并要求在文化方面产生变化一其次，在整个寿命周期内，企业应该能控制增益和保证资产的生产率、这可以通过实施CMMS，维修功能测定系统，规划和计划各项维修活动等来做到。这可以按照不同的策略，根据这些资产对企业贡献的大小和风险程度来完成：在这些策略中，Campbell提出包括下列各项内容：①运行到失效为止；②增加备份装置；③按计划更换；④按计划大修理；⑤针对某一问题而进行的专项维修（ad hocmaintenance）；⑥预防维修（按使用年数或使用情况）；⑦状态维修（CBM）；⑧重新设计、

关键词：维修管理现代管理结构寿命周期控制增益 CMMS 测定系统维修活动风险程度使用情况

Portal hypertensive colopathy is associated with portal hypertension severity in cirrhotic patients

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2009年第38期15卷 4781-4787页

作者： antonio Diaz-sanchez Oscar Nuez-Martinez Cecilia Gonzalez-Asanza Ana Matilla Beatriz Merino Diego Rincon Inmaculada Beceiro Maria Vega Catalina Magdalena Salcedo Rafael Baares Gerardo Clemente Liver Unit-CIBEREHD.Hospital General Universitario Gregorio Maraón Madrid 28007Spain Gastroenterology Unit Hospital Infanta Leonor Gastroenterology Unit Hospital Infanta Sofia Department of Gastroenterology Hospital Universitario Príncipe de Asturias

AIM： To assess the prevalence of portal hypertension （PH） related colorectal lesions in liver transplant candidates, and to evaluate its association with the severity of PH. METHODS： Between October 2004 and December 2005, colonoscopy was performed in 92 cirrhotic liver transplant candidates. We described the lesions resulting from colorectal PH and their association with the grade of PH in 77 patients who underwent measurement of hepatic venous pressure gradient （HVPG）. RESULTS： Mean age was 55 years and 80.7% of patients were men. The main etiology of cirrhosis wasalcoholism （45.5%）. Portal hypertensive colopathy （PHC） was found in 23.9%, colonic varices in 7.6% and polyps in 38% of patients （adenomatous type 65.2%）. One asymptomatic patient had a well-differentiated adenocarcinoma. The manifestations of colorectal PH were not associated with the etiology of liver disease or with the Child-Pugh grade. Ninety percent of patients with colopathy presented with gastroesophageal varices （GEV）, and 27.5% of patients with GEV presented with colopathy （P = 0.12）. A relationship between higher values of HVPG and presence of colopathy was observed （19.9：1：6.2 mmHg vs 16.8 ± 5.4 mmHg, P = 0.045）, but not with the grade of colopathy （P = 0.13）. Preneoplastic polyps and neoplasm （P = 0.02） and spontaneous bacterial peritonitis （P = 0.006） were more prevalent in patients with colopathy. We did not observe any association between previous β-blocker therapy and the presence of colorectal portal hypertensive vasculopathy. CONCLUSION： PHC is common in cirrhotic liver transplant candidates and is associated with higher portal pressure.

关键词： Liver cirrhosis Portal hypertension Polyps Colopathy Liver transplantation

Innovation, Competitiveness and Prosperity： A Factor Analysis of Innovation Indicators in Spain

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Management Studies 2018年第5期6卷 375-383页

作者： antonio Garcia-sanchez David Siles Maria de Mar Vazquez-Mendez Technical University of Cartagena Cartagena Spain

Competitiveness is a wide concept applied to many fields, especially in economics. The study of tourism competitiveness has been focused on different factors that can enhance the prosperity of a destination. One of these factors is innovation. Innovation makes destination＇s enterprises more advanced and efficient, therefore more productive. Innovation is an enhancer of competitiveness and a generator of prosperity because innovation in every aspect （technology, knowledge, organization, and processes） will provide a better quality of life for the inhabitants of the destination. The incidence of innovation on these concepts is validated by a structural equation model. We measure innovation by a range of indicators and through a factor analysis; we get the most relevant indicators of innovation for the model developed in Spain.

关键词： competitiveness innovation prosperity tourism factors indicators