检索结果-南通市图书馆

Experimental study on the wear evolution of different PVD coated tools under milling operations of LDX2101 duplex stainless steel

引用

Advances in Manufacturing 2023年第1期11卷 158-179页

作者： Vitor F.C.Sousa Francisco J.G.Silva Ricardo Alexandre Jose S.Fecheira Gustavo Pinto Andresa Baptista ISEP-School of Engineering Polytechnic of PortoRua Dr.António Bernardino de Almeida4314200–072PortoPortugal INEGI-Driving Science and Innovation Rua Dr.Roberto Frias4004200–465PortoPortugal TEandM-Technology Engineering and MaterialsS.A.Parque Industrial do TaveiroLotes 41-423045–504TaveiroPortugal

Duplex stainless steels are being used on applications that require,especially,high corrosion resistance and overall good mechanical properties,such as the naval and oil-gas exploration *** components employed in these industries are usually obtained by machining,however,these alloys have low machinability when compared to conventional stainless *** this work,a study of the wear developed when milling duplex stainless-steel,LDX 2101,is going to be presented and evaluated,employing four types of milling tools with different geometries and coatings,while studying the influence of feed rate and cutting length in the wear of these *** used have been provided with two and four flutes,as well as three different coatings,namely:TiAlN,TiAlSiN and *** cutting behavior of these tools was analyzed;data relative to the cutting forces developed during the process were obtained;and roughness measurements of the machined surfaces were *** tools were then submitted to scanning electron microscope(SEM)analysis,enabling the identification of the wear mechanisms that tools were subjected to when machining this material,furthermore,the early stages of these mechanisms were also *** this work was done with the goal of relating the machining parameters and cutting force values obtained,identifying,and discussing the wear patterns that were observed in the coating and tools after the milling tests,providing further information on the machining of these alloys.

关键词： Duplex stainless-steel Milling Tool coatings Surface roughness Wear mechanisms

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

Tracking Power System State Evolution with Maximum-correntropy-based Extended Kalman Filter

引用

Journal of Modern Power Systems and Clean Energy 2020年第4期8卷 616-626页

作者： Julio A.D.Massignan João B.A.London Jr. Vladimiro Miranda IEEE Department of Electrical and Computing Engineering School of Engineering of São CarlosUniversity of São PauloSão CarlosBrazil Faculty of Engineering University of Porto and INESC TECPortoPortugal

This paper develops a novel approach to track power system state evolution based on the maximum correntropy criterion,due to its robustness against non-Gaussian *** includes the temporal aspects on the estimation process within a maximum-correntropy-based extended Kalman filter(MCEKF),which is able to deal with both nonlinear supervisory control and data acquisition(SCADA)and phasor measurement unit(PMU)measurement *** representing the behavior of the state variables with a nonparametric model within the kernel density estimation,it is possible to include abrupt state transitions as part of the process noise with non-Gaussian ***,a novel strategy to update the size of Parzen windows in the kernel estimation is proposed to suppress the effects of suspect *** properly adjusting the kernel bandwidth,the proposed MCEKF keeps its accuracy during sudden load changes and contingencies,or in the presence of bad *** with IEEE test systems and the Brazilian interconnected system are carried *** results show that the method deals with non-Gaussian noises in both the process and measurement,and provides accurate estimates of the system state under normal and abnormal conditions.

关键词： Tracking state estimation Kalman filter maximum correntropy power system Parzen window

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

Distributed Energy Resource Scheduling with Focus on Demand Response Complex Contracts

引用

Journal of Modern Power Systems and Clean Energy 2021年第5期9卷 1172-1182页

作者： Pedro Faria Zita Vale GECAD–Research Group on Intelligent Engineering and Computing for Advanced Innovation and Development R.Dr.António Bernardino de Almeida4314249-015PortoPortugal Polytechnic of Porto R.Dr.António Bernardino de Almeida4314249-015PortoPortugal

Demand response(DR)is a flexible way to improve distributed energy resource *** innovative contribution of this paper is to include complex contracts in the model,which can accommodate the constraints according to the special expectations of each *** contracts are included in the optimization of distributed energy resource scheduling to dispatch DR according to the expectations of ***-period DR events are *** this way,consumers can specify the limits on the time,power,and remuneration regarding participation in DR events,which has not been considered in the *** state of the art treats these aspects separately or uses a statistical approach,without providing consumers with options to combine their preferences regarding different aspects of their flexibility *** model has been validated for 218 consumers using several scenarios and different types of distributed generation,showing that it is possible to increase DR with respect to the preferences of consumers.

关键词： Complex contracts demand response distributed generation virtual power player

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

Carbon Monoxide as C1 Building Block in Fine Chemical Synthesis

引用

Chinese Journal of Chemistry 2024年第2期42卷 199-221页

作者： Rui M.B.Carrilho Mario J.F.Calvete Gabor Mikle Laszlo Kollar Mariette M.Pereira University of Coimbra Coimbra Chemistry CentreDepartment of ChemistryRua Larga3004-535 CoimbraPortugal Department of General and Inorganic Chemistry and ELKH-PTE Research Groupfor Selective Chemical Syntheses University of PecsIfjusag utja 6H-7624 PecsHungary

Carbon monoxide(CO)has become one of the most relevant and versatile renewable C1 building blocks for chemical synthesis,especially in the fine chemicals industry,due to the development of efficient and selective catalysts for its *** this review,we present a comprehensive critical analysis of the last 10 years literature on the use of CO as a renewable feedstock for fine chemicals *** review is organized by type of catalytic reaction,namely alkene and alkyne carbonylation,hydroformylation,carbonylation of aryl halides,carbonylative cross-coupling and C-H *** examples of the synthesis of relevant building blocks and/or known pharmaceuticals are *** is placed on examples of utilizing CO as the C1 building block in one or more catalytic *** catalyst used and the reaction conditions are consistently presented throughout all of the examples.

关键词： Carbon monoxide Fine chemicals Carbonylation Hydroformylation C-H functionalization

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

The role of physical properties in explosive welding of copper to stainless steel

引用

Defence Technology（防务技术） 2023年第4期22卷 88-98页

作者： G.H.S.F.L.Carvalho I.Galvao R.Mendes R.M.Leal A.B.Moreira A.Loureiro Univ Coimbra CEMMPREDepartamento de Engenharia Mec^anicaRua Luís Reis Santos3030-788CoimbraPortugal Department of Industrial Engineering University of FirenzeVia di Santa Marta 350139FirenzeItaly ISEL Departamento de Engenharia Mec^anicaInstituto Politecnico de LisboaRua Conselheiro Emídio Navarro 11959-007LisboaPortugal Univ Coimbra ADAILEDAPDepartamento de Engenharia Mec^anicaRua Luís Reis Santos3030-788CoimbraPortugal LIDA-ESAD.CR Instituto Politecnico de LeiriaRua Isidoro Inacio Alves de Carvalho2500-321Caldas da RainhaPortugal Univ.Porto LAETA/INEGIDept.Eng.Metalúrgica e de MateriaisR.Dr.Roberto Frias4200-465PortoPortugal

This paper investigates the effects of the physical properties on the microstructure and weldability of explosive welding by joining two metals with a significant contrast in thermophysical properties:stainless steel and *** welds between stainless steel and copper were obtained,and the interfacial morphology was wavy,regardless of the position of the *** weldability of dissimilar pairs was found to be more dependent on the relationship between the physical properties of the base materials than on the absolute value of the material *** there is a significant difference in thermal conductivity between the flyer and the base plate,together with a material with a low melting temperature,the weldability of the pair is often *** relative position of the plates affects the interfacial microstructure even when similar morphologies are *** the metallic pairs studied,the wave size was bigger for the configuration in which the ratio between the density of the flyer and the density of the base plate is *** same phenomenon was observed for the impedance:bigger waves were found for a smaller ratio between the impedance of the flyer and the impedance of the base plate.

关键词： Explosive welding Solid-state Copper-stainless steel Dissimilar Interface morphology Weldability

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

Water yield and biomass production for on a eucalypt-dominated Mediterranean catchment under different climate scenarios

引用

Journal of Forestry Research 2023年第5期34卷 1263-1278页

作者： Joao Rocha Ana Quintela Dalila Serpa Jan Jacob Keizer Sérgio Fabres RAIZ-Forest and Paper Research Institute Quinta de S.FranciscoRua JoséEstevao(EN 230-1)3800–783 EixoAveiroPortugal Department of Environment and Planning Centre of Environmental and Marine Studies(CESAM)University of AveiroCampus Universitário de Santiago3810–193 AveiroPortugal

Worldwide,forests are vital in the regulation of the water cycle regulation and in water balance *** of ecohydrological responses of production forests is essential to support management strategies,especially where water is already *** climatological patterns are expected to impact thermopluviometric regimes,water cycle components,hydrological responses,and plant physiology,evapotranspiration rates,crop productivity and land management *** work(1)assessed the impacts of different predicted climate conditions on water yield;(2)inferred the impacts of climate change on biomass production on eucalypt-to-eucalypt succes *** this end,the widely accepted Soil and Water Assessment Tool(SWAT)was run with the RCA,HIRHAM5 and RACMO climate models for two emission scenarios(RCP 4.5 and8.5).Three 12-year periods were considered to simulate tree growth under coppice *** results revealed an overall reduction in streamflow and water yield in the catchment in line with the projected reduction in total annual ***,HIRHAM5 and RACMO models forecast a slight shift in seasonal streamflow of up to 2 months(for2024-2048)in line with the projected increase in precipitation from May to *** biomass production,the extreme climate model(RCA)and severe emis sion scenario(RCP 8.5)predicted a decrease up to 46%.However,in the less extreme and more-correlated(with actual catchment climate conditions)climate models(RACMO and HIRHAM5)and in the less extreme emission scenario(RCP 4.5),biomass production increased(up to 20%),and the growth cycle was slightly *** was proven to be a valuable tool to assess climate change impacts on a eucalypt-dominated catchment and is a suitable decision-support tool for forest managers.

关键词： Climate scenarios Forested catchments Forest ecohydrological modelling Eucalypt biomass production SWAT model

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

Functionalization of AuMSS nanorods towards more effective cancer therapies

引用

Nano Research 2019年第4期12卷 719-732页

作者： Carolina F. Rodrigues Telma A. Jacinto Andre F. Moreira Elisabete C. Costa Sonia P. Miguel Ilidio J. Correia CICS-UBI -Centro de Investigagao em Ciencias da Saude Universidade da Beira Interior Covilhd 6200-506 Portugal CIEPQF - Departamento de Engenharia Quimica Universidade de Coimbra Rua 13 Silvio Lima Coimbra 3030-790 Portugal

The applicatio n of nano particles as selective drug delivery platforms arises as one the most promising therapeutic strategies in the biomedical field. Such systems can encapsulate drugs, prevent its premature degradation, transport and promote the drugs specific delivery to the target site. Among the different nanostructures, gold-core mesoporous silica shell (AuMSS) nanorods have been one of the most explored due to their unique physical and chemical properties. The mesoporous silica biocompatibility, high surface area that can be easily functionalized, tubular pores that can store the drugs, conjugated with the intrinsic capacity of gold nanorod to absorb near-infrared radiation, allows the combination of hyperthermia (i.e., photothermal effect) with drug delivery, making them a nanoplatforms with a huge potential for cancer therapy. Nevertheless, the successful applicati on of AuMSS nanoparticles as an effective can cer nano medicine is hindered by the uncon trolled release of the therapeutic payloads, limited blood circulation time and unfavorable pharmacokinetics. In this review, an overview of the modificati ons performed to improve the AuMSS nano rods applicati on in nanom edicine is provided, highlighting the practical approaches that enhaneed the AuMSS nanorods targeting, responsiveness to different stimuli, and blood circulation time. Further, the basics of AuMSS nano rods syn thesis procedures, gen eral properties, and its applicati on in can cer therapy are also described.

关键词： gold nano rods silica surface modifications targeting cancer

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

Fluorescent probes for the detection of reactive oxygen species in human spermatozoa

引用

Asian Journal of Andrology 2020年第5期22卷 465-471页

作者： Sara Escada-Rebelo Francisca G Mora Ana P Sousa Teresa Almeida-Santos Artur Paiva Joao Ramalho-Santos phD Programme in Experimental Biology and Biomedicine CNC-Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbra 3004-504Portugal Biology of Reproduction and Stem Cell Group CNC-Center for Neuroscience and Cell BiologyUniversity of CoimbraCoimbra 3004-504Portugal IIIUC-Institute for Interdisciplinary Research Casa Costa AlemaoUniversity of CoimbraCoimbra 3030-789Portugal Reproductive Medicine Unit University Hospitals of CoimbraCoimbra 3004-561Portugal Faculty of Medicine University of CoimbraCoimbra 3000-370Portugal Clinical Pathology Unit University Hospitals of CoimbraCoimbra 3004-561Portugal Department of Life Sciences University of CoimbraCoimbra 3000-456Portugal

Reactive oxygen species(ROS)production is a by-product of mitochondrial activity and is necessary for the acquisition of the capacitated state,a requirement for functional ***,an increase in oxidative stress,due to an abnormal production of ROS,has been shown to be related to loss of sperm function,highlighting the importance of an accurate detection of sperm ROS,given the specific nature of this *** this work,we tested a variety of commercially available fluorescent probes to detect ROS and reactive nitrogen species(RNS)in human sperm,to define their *** both flow cytometry(FC)and fluorescence microscopy(FM),we confirmed that MitoSOX™Red and dihydroethidium(DHE)detect superoxide anion(as determined using antimycin A as a positive control),while DAF-2A detects reactive nitrogen species(namely,nitric oxide).For the first time,we also report that RedoxSensor™Red CC-1,CellROX®Orange Reagent,and MitoPYl seem to be mostly sensitive to hydrogen peroxide,but not ***,mean fluorescence intensity(and not percentage of labeled cells)is the main parameter that can be reproducibly monitored using this type of methodology.

关键词： flow cytometry fluorescent probes human spermatozoa oxidative stress reactive oxygen species

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

In vitro toxicity of particulate matter emissions from residential pellet combustion

引用

Journal of Environmental Sciences 2022年第5期34卷 215-226页

作者： Estela D.Vicente Daniela Figueiredo Catia Goncalves Isabel Lopes Helena Oliveira Nora Kovats Teresa Pinheiro Celia A.Alves Department of Environment and Planning and CESAM-Centre for Environmental and Marine Studies University of Aveiro3810-193 AveiroPortugal Department of Biology and CESAM-Centre for Environmental and Marine Studies University of Aveiro3810-193 AveiroPortugal Centre of Natural Environmental Sciences University of PannoniaEgyetem str.108200 VeszpremHungary Instituto de Bioengenharia e Biociencias Departamento de Engenharia e Ciencias NuclearesInstituto Superior TecnicoUniversidade de LisboaAv.Rovisco Pais 11049-001 LisboaPortugal

Particulate matter emissions(PM10)from the combustion,in a residential stove,of two com-mercial brands of certified(ENplus A1)pellets,a non-certified brand and laboratory made pellets of acacia were tested for their ability to induce ecotoxic,cytotoxic,and mutagenic re-sponses in unicellular organisms and a human cell *** was evaluated through the Vibrio fischeri bioluminescence inhibition ***,cytotoxicity was assessed at two time points(24-and 48-hr)through two complementary techniques in order to evaluate the cellular metabolic activity and membrane integrity of human lung epithelial cells *** Ames test using two Salmonella typhimurium strains(TA100 and TA98)was employed to assess the mutagenic potential of the polycyclic aromatic hydrocarbon fraction extracted from the PM10 *** obtained with the bioluminescent bacteria indicated that only particles from the combustion of acacia pellets were *** samples induced im-pairment on the A549 cells metabolic activity,while no significant release of lactate dehy-drogenase was ***10 emissions from acacia pellets were the most cytotoxic,while samples from both certified pellets evoked significant cytotoxicity at lower ***-icity time-dependency was only observed for PM10 from the combustion of acacia pellets and one of the brands of certified *** activity was not detected in both *** murium *** study emphasises the role of the raw material for pellet manu-facturing on the toxicological profile of PM *** raw materials should be deeply investigated before their use in pelletisation and combustion in residential appli-ances.

关键词： Ecotoxicity Cytotoxicity Mutagenicity Fuel quality Pellet combustion PM10 emissions

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

Green economy and waste management: An inevitable plan for materials science

引用

Progress in Natural Science:Materials International 2022年第1期32卷 1-9页

作者： Suman Nandy Elvira Fortunato Rodrigo Martins i3N/CENIMAT Department of Materials ScienceFaculty of Science and Technology Universidade NOVA de Lisboa and CEMOP/UNINOVA Campus de Caparica

Covid is giving us many lessons among which one must be to realize that this is the time to act for sustainable future. The smart world around us has made it inevitable to have an alarming situation regarding the uncontrolled growth of waste products such as plastic and electronic wastes. Both are immense threats to the health of human,wildlife and environment, that eventually affect the societal and economic structures as evident from recent Covid-crisis. The proper management of these wastes and innovating ideas for new sustainable technologies are the need of the hour. Circular economy act with green technology(green economy) is the way to tackle this challenge. Current perspective presents the overview of the scenario regarding these burgeoning issues and demonstrates some measures that are taken or being considered to depend on to come out of them.

关键词： Plastic waste management Medical waste management Electronic waste management Circular economy Green technology Sustainable world

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

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：