检索结果-南通市图书馆

Mapping fractional landscape soils and vegetation components from Hyperion satellite imagery using an unsupervised machinelearning workflow

引用

International Journal of Digital Earth 2018年第7期11卷 670-690页

作者： Michael J.Friedel Massimo Buscema luiz eduardo vicente Fabio Iwashita Andréa Koga-vicente Hydrogeology Department GNS ScienceLower HuttNew Zealand Mathematical&Statistical Sciences University of ColoradoDenverCOUSA Semeion Institute RomeItaly Satellite Monitoring Unit Brazilian Corporation of Agricultural Research-EMBRAPACampinasBrazil Earth Sciences Department University of FlorenceFlorenceItaly Center for Meteorological and Climatological Research in Agriculture University of CampinasCampinasBrazil

An unsupervised machine-learning workflow is proposed for estimating fractional landscape soils and vegetation components from remotely sensed hyperspectral *** workflow is applied to EO-1 Hyperion satellite imagery collected near Ibirací,Minas Gerais,*** proposed workflow includes subset feature selection,learning,and estimation *** training with landscape feature class realizations provide a hypersurface from which to estimate mixtures of soil(e.g.0.5 exceedance for pixels:75%clay-rich Nitisols,15%iron-rich Latosols,and 1%quartz-rich Arenosols)and vegetation(e.g.0.5 exceedance for pixels:4%Aspen-like trees,7%Blackberry-like trees,0%live grass,and 2%dead grass).The process correctly maps forests and iron-rich Latosols as being coincident with existing drainages,and correctly classifies the clay-rich Nitisols and grasses on the intervening *** classifications are independently corroborated visually(Google Earth)and quantitatively(random soil samples and crossplots of field spectra).Some mapping challenges are the underestimation of forest fractions and overestimation of soil fractions where steep valley shadows exist,and the under representation of classified grass in some dry areas of the Hyperion *** preliminary results provide impetus for future hyperspectral studies involving airborne and satellite sensors with higher signal-to-noise and smaller footprints.

关键词： Hyperspectral machine learning remote sensing soils and vegetation unsupervised workflow

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ProTSA: A Testing Process for Automotive Software Domain

引用

Journal of Software Engineering and Applications 2024年第7期17卷 571-615页

作者： Renato Rafael Arcanjo luiz eduardo Galvão Martins Dirceu Lavoiser Fernandes Graci Department of Inovation and Science Federal University of Sao Paulo (UNIFESP) Sao Jose dos Campos Brazil Department of Automotive Electronics Faculty of Technology of Sao Paulo (Fatec) Santo Andre Brazil

This study evaluates the development of a testing process for the automotive software domain, highlighting challenges stemming from the absence of adequate processes. The research demonstrates the application of Design Science Research methodology in developing, an automotive software testing process—ProTSA, using six functional testing modules. Additionally, the study evaluates the benefits of implementing ProTSA in a specific Original Equipment Manufacturer (OEM) using an experimental single-case approach with industry professionals’ participation through a survey. The study concludes that combining testing techniques with effective communication and alignment is crucial for enhancing software quality. Furthermore, survey data indicates that implementing ProTSA leads to productivity gains by initiating tests early, resulting in time savings in the testing program and increased productivity for the testing team. Future work will explore implementing ProTSA in cybersecurity, over-the-air software updates, and autonomous vehicle testing processes. .

关键词： Verification and Validation Automotive Software Automotive Systems

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Dendritic Growth, Eutectic Features and Their Effects on Hardness of a Ternary Sn–Zn–Cu Solder Alloy

引用

Acta Metallurgica Sinica(English Letters) 2017年第6期30卷 528-540页

作者： Bismarck luiz Silva Rodrigo Valenzuela Reyes Amauri Garcia Joséeduardo Spinelli Department of Materials Engineering Federal University of Rio Grande do Norte-UFRNNatalRN 59078-970Brazil Department of Materials Engineering Federal University of Sao Carlos-UFSCarSao CarlosSP 13565-905Brazil Department of Manufacturing and Materials Engineering University of CampinasUNICAMPCampinasSP 13083-860Brazil

The present investigation is based on the results of a directionally solidified （DS） Sn-9 wt%Zn-2 wt%Cu alloy, including primary/secondary/tertiary dendrite arm spacings of the Sn-rich matrix, the morphologies of the eutectic mixture and the corresponding interphase spacing, the nature and proportion of the Cu-Zn intermetallic compound （IMC）. The main purpose is to establish interrelations of these microstructure features with experimental solidification thermal parameters, such as cooling rates and growth rates （v）, macrosegregation and hardness. Such interrelations are interesting for both industry and academy since they represent a tool permitting the preprogramming of final properties based on the design of the microstructure. In the case of Sn-Zn-Cu alloys, hardly anything is known about the combined effects of the length scale of the microstructure and fraction and distribution of the primary IMC on hardness. The alloy microstructure is composed of a β-Sn dendritic region, surrounded by a eutectic mixture of α-Zn and β-Sn phases and the γ-Cu5Zn8 IMC. The eutectic interphase spacing varies in the range 1.2-3.6 μm, with the α-Zn phase having a globular morphology for ν 〉 0.5 mm/s and a needle-like morphology for ν 〈 0.3 mm/s. A modified Hall-Petch-type experimental expression relating hardness to the interphase spacing is proposed.

关键词： Sn-Zn-Cu solder alloy Solidification Microstructure Eutectic morphology Hardness

来源：

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

Proactive reconciliation as a tool for integrating mining and milling operations

引用

International Journal of Mining Science and Technology 2019年第2期29卷 239-244页

作者： Ana Carolina Chieregati luiz eduardo Campos Pignatari Francis Fernand Pitard Homero Delboni Jr Department of Mining and Petroleum Engineering University of Sao Paulo EDEM Engenharia Mineral Francis Pitard Sampling Consultants

Historically, reconciliation has been viewed as a quality test of model estimates as well as a powerful tool for detecting and correcting problems in all stages of mine operations from resource estimation to metal production. If used correctly, reconciliation helps to better predict the life of mine(LOM), improves the adherence of production plans to the respective budget, and allows for effective control of the mining and milling processes. However, the accuracy of reconciliation results requires that all input data must be generated in accordance with the principles of sampling correctness. Furthermore, complete reconciliation systems can become extremely complex and must be carefully analyzed in order to provide realistic and helpful conclusions. Based on these concepts, this paper presents a successful proactive reconciliation system applied to a copper and gold mine in Brazil for monitoring and integrating mining and milling operations.

关键词： Reconciliation Prognostication Sampling Gold Copper

来源：

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

Zeta potential measurement on lithium lanthanum titanate nanoceramics

引用

Particuology 2016年第1期14卷 69-72页

作者： Carlos Ricardo Milian Pila eduardo Perez Cappe Yodalgis Mosqueda Laffita Oswaldo luiz Alves Institute of Materials Science and Technology (IMRE) Havana University Havana CP 10400 Cuba Solid state Chemistry Laboratory Institute of Chemistry Campinas University Campinas CP 13083-970 SP Brazil

The zeta potential, isoelectric point, and agglomeration of ***3 （LLTO） nanoparticles dispersed in aqueous media at different ionic strengths have been studied. The zeta potential was determined from electrophoretic mobility measurements, according to Smoluchowski＇s equation, for Li0.5La0.5TiO3 suspen- sions in NaCl and KCI electrolytes with ionic strengths of 1, 10, and 100 mmol/dm3. The isoelectric point （IEP）, zeta potential （ζ）, and the agglomeration were shown to strongly depend on the ionic strength of the Li0.5La0.5TiO3 aqueous colloidal suspension in both NaCI and KCI electrolytes, which allows the deter- mination of the effects of environmental conditions for ***3 manipulation in aqueous colloidal systems. The suspensions of Li0.5La0.5TiO3 nanoparticles reach the IEP in the pH range 0f3-5. The （ of Li0.5La0.5TiO3 nanoparticles varied from positive to negative values with a pH increase, which allows for the control of the surface charge depending on the purpose. The pH range of 7-g and an ionic strength ≤1 mmol/dm3 are recommended as the most suitable conditions for both the LLTO colloidal shaping techniques application and the LLTO-based nanocomposite formation.

关键词： Titanate Nanoparticles Zeta potential Colloidal suspension

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Biliary tract reconstruction using jejunal tube:an experimental study in dogs

引用

Hepatobiliary & Pancreatic Diseases International 2009年第2期8卷 179-185页

作者： Eliane Anrain Trentini eduardo Crema Juan Carlos Llanos Mauro Masson Lerco luiz Alberto Magna luiz Sergio Leonardi State University of Campinas Faculty of Medical SciencesDepartment of Surgery Federal University of Triangulo Mineiro So Paulo State University "Júlio de Mesquita Filho" Faculty of Medicine of BotucatuDepartment of Surgery and Orthopedics

BACKGROUND:To physiologically reconstruct the biliary tract,Crema et al suggested the application of the Monti principle to the biliary tract,already used in humans for the urinary *** this technique,a jejunal segment is transversely *** study aimed to evaluate the efficacy of jejunal tube interposition between the common bile duct and duodenum in ***:Thirteen dogs underwent a laparoscopic common bile duct ligature,followed by a biliodigestive connection by jejunal tube interposition after one *** levels of glutamic-pyruvic and glutamic-oxalacetic transaminases,total bilirubins,alkaline phosphatase and gamma-glutamyltransferase were assessed before surgery and thereafter weekly until euthanasia,which was performed 6 weeks after biliodigestive ***:Data on 9 dogs were analyzed *** dogs presented with obstructive jaundice after common bile duct ligature,as confirmed by biochemical *** showed a statistically significant reduction in cholestasis after biliodigestive connection by jejunal tube interposition and were healthy until the end of the ***:A statistically significant reduction was seen in total bilirubin and canalicular enzymes(alkaline phosphatase and gamma-glutamyltransferase)in the 9 dogs 6 weeks after biliodigestive connetion by jejunal tube interposition.

关键词： biliary tract surgical procedures monti principle obstructive jaundice

来源：

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

Co-Simulation of an SRG Wind Turbine Control and GPRS/EGPRS Wireless Standards in Smart Grids

引用

IEEE/CAA Journal of Automatica Sinica 2021年第3期8卷 656-663页

作者： Andre luiz de Oliveira Carlos eduardo Capovilla Ivan Roberto Santana Casella JoséLuis Azcue-Puma Alfeu J.Sguarezi Filho University of Sao Paulo Sao Paulo 05508-010Brazil Federal University of ABC Santo Andre 09210-580Brazil

Wind energy can be considered a push-driver factor in the integration of renewable energy sources within the concept of smart *** its full deployment,it requires a modern telecommunication infrastructure for transmitting control signals around the distributed generation,in which,the wireless communication standards stand out for employing modern digital modulation and coding schemes for error correction,in order to guarantee the power plant *** some developing countries,such as Brazil,the high penetration of commercial mobile wireless standards GPRS and EGPRS(based on GSM technology)have captivated the interests of the energy sector,and they now seek to perform remote monitoring and control *** this context,this article presents a comparative performance analysis of a wireless control system for a wind SRG,when a GPRS or EGPRS data service is *** system performance is analyzed by co-simulations,including the wind generator dynamics and the wireless channel *** satisfactory results endorse the viability and robustness of the proposed system.

关键词： General packet radio service(GPRS)/enhanced GPRS(EGPRS) smart grids switched reluctance generator(SRG) wind energy wireless communications

来源：

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

Characterization of blood flow and the effects of exogenous estradiol benzoate on residual follicles formed after ultrasound-guided transvaginal follicle aspiration in cattle

引用

Journal of Animal Science and Biotechnology 2017年第1期8卷 51-56页

作者： Alberto Mansur Ghetti luiz Gustavo Bruno Siqueira eduardo Kenji Nunes Arashiro Miller Pereira Palhao Felipe Zandonadi Brandao Joao Henrique Moreira Viana Universidade Federal Fluminense Niteroi RJ 24230-340 Brazil Embrapa Gado de Leite Juiz de Fora MG 36038-330 Brazil Universidade Jose do Rosario Vellano Alfenas MG 37130-000 Brazil Embrapa Recursos Geneticos e Biotecnologia PqEB Av. W5 N Brasilia DF 70770-917 Brazil

Background： Removal of the follicular content by ultrasound-guided transvaginal follicle aspiration（TVFA） may fail to induce immediate atresia and loss of function, resulting in the occurrence of residual follicles（RF）. The aims of this study were to characterize the blood flow in RF and to determine the effects of the treatment with estradiol benzoate on RF fate. Lactating, cyclic Holstein-Gir crossbred cows were used. In Experiment 1, follicular wave emergence（D0） was synchronized in cows（n = 10） and follicular growth was then monitored by transrectal ultrasonography from D0 to D8, followed by TVFA of the largest follicle present on the ovaries 24 h later. Color Doppler ultrasound imaging was used to examine blood flow on the follicular wall, which was recorded immediately before and every 12 h after TVFA, up to 72 h. In experiment 2, cows（n = 22） were randomly allocated to receive either 2 mL of saline i.m.（Control group, n = 11） or 2 mL estradiol benzoate i.m.（EB group, n = 11）immediately after TVFA. Ovaries were scanned every 12 h to confirm the presence and to measure the diameter of RF. The contents of the RF, if present, were collected 72 h after the first TVFA, using the same aspiration *** fluid from original follicles and RF were stored at-20 °C until hormonal ***： In Experiment 1, there was no reduction（P 〉 0.05） of blood flow in the remaining follicle walls after TVFA and maximum blood flow values were observed at 49.5 ± 19.7 h post-TVFA. In Experiment 2, formation of RF after TVFA was proportionally similar between Controls（5/9） and EB（5/10） cows. Also, RF diameter did not differ between groups（P 〉 0.05）. Nonetheless, the content of RF from cows in the EB group had lower（P = 0.0004）estradiol（E2） concentration and lower（P = 0.0005） E2：P4 ratio compared with ***： In conclusion, 1） the persistence of vascularization in the remaining follicle wall may contribute to the formation of RF after follicle aspiration,

关键词： Doppler Ovary Ovum pick-up Steroidogenesis Vascularization

来源：

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

Numerical Study on the Effect of Submerged Depth on the Horizontal Plate Wave Energy Converter

引用

China Ocean Engineering 2014年第5期28卷 687-700页

作者： Flávio Medeiros SEIBT eduardo Costa COUTO Elizaldo Domingues dos SANTOS Liércio André ISOLDI luiz Alberto Oliveira ROCHA Paulo Roberto de Freitas TEIXEIRA Graduate Program of Ocean Engineering Universidade Federal do Rio Grande96203-900 Rio Grande RS Brazil Mechanical Engineering Department Universidade Federal do Rio Grande do Sul90050-170 Porto Alegre RS Brazil

The growing search for clean and renewable energy sources has given rise to the studies of exploring sea wave energy. This paper is concerned with the numerical evaluation of the main operational principle of a submerged plate employed for the conversion of wave energy into electrical one. The numerical model used to solve the conservation equations of mass, momentum and transport of volume fraction is based on the finite volume method （FVM）. In order to tackle with the flow of mixture of air-water and its interaction with the device, the multiphase model volume of fluid （VOF） is employed. The purpose of this study is the evaluation of a numerical model for improvement of the knowledge about the submerged plate wave energy converter, as well as the investigation of the effect of the distance from the plate to the bottom of the sea （HP） on the performance of the converter. The simulations for several distances of the plate from the seabed show that the optimal efficiency is 64%, which is obtained for HP=0.53 m （88% of the depth）. This efficiency is 17% larger than that found in the worst case （HP=0.46 m, 77% of the depth）.

关键词： numerical simulation submerged plate wave energy conversion efficiency

来源：

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

Glutamine and glutamate supplementation raise milk glutamine concentrations in lactating gilts

引用

Journal of Animal Science and Biotechnology 2012年第1期3卷 25-31页

作者： Helena Emilia CCC Manso Helio C Manso Filho luiz E de Carvalho Marianne Kutschenko eduardo T Nogueira Malcolm Watford Department of Animal Sciences Rural Federal University of PernambucoRecifePE52171-900Brazil Departament of Animal Sciences Federal University of CearáFortalezaCE60020-181Brazil Ajinomoto do Brazil S oPauloSP04015-001Brazil Department of Nutritional Sciences Rutgers UniversityNew BrunswickNJ08901USA.

Glutamine is the most abundant amino acid in milk, and lactation is associated with increased glutamine utilization both for milk synthesis and as a fuel for the enlarged small intestine. A number of recent studies have indicated that lactation is accompanied by a mild catabolic state in which skeletal muscle proteins are degraded to provide amino acids that are used to synthesize additional glutamine. In this study we tested the hypothesis that supplemental L-glutamine or the commercially available glutamine supplement Aminogut （2.5% by weight mixed into daily feed） provided to gilts from 30 days prior to parturition until 21 days post-parturition would prevent a decrease in skeletal muscle glutamine while increasing the glutamine content of the milk. Muscle glutamine content decreased （P 〈 0.05） in control animals during lactation but this was prevented by supplementation with either L-glutamine or Aminogut. In this study, neither lactation nor supplementation had any effect on plasma glutamine or glutamate content. Free glutamine, and the total glutamine plus glutamate concentrations in milk from the control and the Aminogut group rose （P 〈 0.05） during the first 7 days of lactation, with milk concentrations in the L-glutamine supplemented group showing a similar trend （P = 0.053）. Milk glutamate remained constant between day 7 and 21 of lactation in the control and L-glutamine supplemented groups, but by day 21 of lactation the free glutamine, glutamate, and glutamine plus glutamate concentrations in milk from Aminogut-treated gilts were higher than those of control gilts. Thus dietary glutamine supplementation can alleviate the fall in intramuscular glutamine content during lactation in gilts, and may alleviate some of the catabolic effects of lactation. Furthermore, the increased milk glutamine content in the supplemented gilts may provide optimum nutrition for piglet development.

关键词： glutamate glutamine lactation milk pig skeletal muscle

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：