检索结果-南通市图书馆

Data Intelligence 2020年第1期2卷 230-237,316页

作者： Peter Wittenburg Franciska de Jong Dieter van Uytvanck Massimo Cocco Keith Jeffery Michael Lautenschlager Hannes Thiemann Margareta Hellstrom Ari Asmi Petr Holub Max Planck Computing and Data Facility Gießenbachstraße 285748 GarchingGermany CLARIN eric CLARIN ERIC Drift 10Utrecht 3512 BSThe Netherlands epos eric Via di Vigna Murata 605Rome 00143Italy Keith G Jeffery Consultants FaringdonUK DKRZ Ringgold standard institution Bundesstr.45aHamburgHamburg 20146Germany Department of Physical Geography and Ecosystem Ringgold standard institutionLund UniversityScienc Sölvegatan 12Lund 22362Sweden University of Helsinki Ringgold Standard Institution–Institution of Atmospheric and Earth System Sciences P.O.Box 64Helsinki 00014Finland BBMRI-eric Neue Stiftingtalstrasse 2/B/6 Graz 8010Austria

Since 2009 initiatives that were selected for the roadmap of the European Strategy Forum on Research Infrastructures started working to build research infrastructures for a wide range of research *** important result of the strategic discussions was that distributed infrastructure scenarios were now seen as“complex research facilities”in addition to,for example traditional centralised infrastructures such as *** this paper we look at five typical examples of such distributed infrastructures where many researchers working in different centres are contributing data,tools/services and knowledge and where the major task of the research infrastructure initiative is to create a virtually integrated suite of resources allowing researchers to carry out state-of-the-art *** analysis shows that most of these research infrastructures worked on the Findability,Accessibility,Interoperability and Reusability dimensions before the term“FAIR”was actually *** definition of the FAIR principles and their wide acceptance can be seen as a confirmation of what these initiatives were doing and it gives new impulse to close still existing *** initiatives also seem to be ready to take up the next steps which will emerge from the definition of FAIR maturity *** from these infrastructures should bring in their 10-years’experience in this definition process.

关键词： Infrastructure FAIR Metrics GO FAIR Matrix

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

Blue LED growth from 2 inch to 8 inch

引用

Science China(Technological Sciences) 2011年第1期54卷 33-37页

作者： Frank LU Dong LEE Dan BYRNES eric ARMOUR & William QUINN Veeco Turbodisc-Somerset

Growth of blue InGaN based LED structures on sapphire wafers from 2 inch to 8 inch in diameter was investigated using the Veeco K465 MOCVD platform. Our results indicate that the same pressure,rotation rate and hydride flows can be used for all wafer sizes. AFM and X-ray studies reveal that all wafer sizes have comparable high-quality crystallinity and defect levels for GaN and InGaN/GaN MQW growth. Although the larger diameter wafers exhibit larger wafer bow due to lattice and thermal mismatch,with proper wafer pocket design,good wavelength and thickness uniformity can be obtained for all wafer sizes.

关键词： GaN InGaN blue LED MOCVD

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

Controlled location of S vacancies in MoS_(2) nanosheets for high-performance hydrogenation of CO_(2) to methanol

引用

Journal of Energy Chemistry 2022年第1期31卷 113-115,I0004页

作者： Gabriele Centi Dept.ChiBioFarAm University of MessinaItaly and ERIC Aisbl.BrusselsBelgium

Introduction In a joint contribution among many Chinese research Institutes,a recent paper published on Nature Catalysis reported the use of sulfur vacancy-rich MoS_(2)as a novel catalyst for the hydrogenation of CO_(2)to methanol[1].A commentary on this paper was also published on the same journal[2]reporting as a summary:"Highly active,selective and stable catalysts for the hydrogenation ofC0_(2)to methanol are immensely sought ***,using a broad range of spectroscopic methods,in-plane double sulfur vacancies of MoS_(2)sheets have been suggested to catalyse this reaction using an unusual mechanism".

关键词： CO_(2) Methanol MOS_(2)nanosheet In-plane S vacancies

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

碳基催化剂:为开发下一代纳米工程催化材料开辟新方法(英文)

引用

催化学报 2014年第6期35卷 783-791页

作者： Claudio Ampelli Siglinda Perathoner Gabriele Centi University of Messina INSTM/CASPE and ERIC aisbl Italy

This essay analyses some of the recent development in nanocarbons (carbon materials having a defined and controlled nano-scale dimension and functional properties which strongly depend on their nano-scale features and architecture), with reference to their use as advanced catalytic materials. It is remarked how their features open new possibilities for catalysis and that they represent a new class of catalytic materials. Although carbon is used from long time in catalysis as support and electrocatalytic applications, nanocarbons offer unconventional ways for their utilization and to address some of the new challenges deriving from moving to a more sustainable future. This essay comments how nanocarbons are a key element to develop next-generation catalytic materials, but remarking that this goal requires overcoming some of the actual limits in current research. Some aspects are discussed to give a glimpse on new directions and needs for R&D to progress in this direction.

关键词：催化材料催化剂纳米工程碳基开发纳米碳纳米尺度功能特性

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

Fabrication of Near Net Shape Metallic Foam via Plaster Mould

引用

Journal of Materials Science & Technology 2008年第3期24卷 335-339页

作者： Young-Hwan Song Hwan-Goo Seon Soo-Han Parka Min-Jae Jeong Bo-Young Hur i-Cube Center School of Nano and Advanced Materials EngineeringGyeongsang National University eric School of Nano and Advanced Materials EngineeringGyeongsang National University

Fabrication characteristics are unstable in direct foaming method. Therefore, most of near net-shape metallic foams are produced, and investigated by powder metallurgy. Direct foaming method, however, has many benefits （i.e. reduce the unit cost of goods and fabrication process etc.） to fabrication of metallic foams. In this article, the fabrication characteristic of near net-shape metallic foams by direct foaming method was evaluated. Al and Plaster was used for base material and mould material respectively. Ca and TiH2 were added to molten Al as thickening and blowing agent for stable condition of bubbles. Thickening time was about 10 min with a stirring speed of 600 r/min. Foaming time was 30-120 s for evaluation of the optimum foaming condition. Amount of agent was selected by pre-experimental data. Porosity of near net-shape goods was measured by Archimedes method. On the other hand, it seems that increasing poring time and thickening agent make the poor porosity

关键词： Metal foam Near net shape foam Porosity

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

A Multiple Classifier System Using an Adaptive Strategy for Intrusion Detection

A Multiple Classifier System Using an Adaptive Strategy for ...

引用

International Conference on Intelligent Computational Systems(ICICS’2012);International Conference on Mechanical,Automotive and Materials Engineering(ICMAME’2012);International Conference on Electronics,Biomedical Engineering and its Applications(ICEBEA’2012);International Conference on Ecological,Environmental and Biological Sciences(ICEEBS’2012);International Conference on Business,Economics,Management and Behavioral Sciences (ICBEMBS’2012);International Conference on Applied Mathematics and Pharmaceutical Sciences(ICAMPS’2012)

作者： Emna Bahri Nouria Harbi Hoa Nguyen Huu university of Lyon ERIC Laboratory

Recently, information security has become a key issue in information technology as the number of computer security breaches are exposed to an increasing number of security threats. A variety of intrusion detection systems （IDS） have been employed for protecting computers and networks from malicious network-based or host-based attacks by using traditional statistical methods to new data mining approaches in last decades. In effect, the detection of the anomalies in the data-processing networks is regarded as one problem of data classification where the use of the data mining techniques and machine learning. In this paper, we present a new method performing the intrusion detection system. This approach, called MCSAS, is based on a multiple classifier System that uses an adaptive strategy for intrusion detection. The adaptive strategy is inspired from Boosting, an ensemble method that distinguishes attacks from normal behaviors and identifies different types of intrusions. The experimental results, conducted on the KDD99 dataset, prove that our proposed solution approach outperforms several state-of-the-art methods, particularly indetecting rare attack types.

关键词： Intrusion detection system ensembles methods new multiple classifier KDD99.

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Role of size and pretreatment of Pd particles on their behaviour in the direct synthesis of H_2O_2

引用

Journal of Energy Chemistry 2016年第2期25卷 295-303页

作者： Salvatore Abate Katia Barbera Gabriele Centi Gianfranco Giorgianni Siglinda Perathoner University of Messina ERIC aisbl and INSTMCASPE Section Industrial Chemistry

Two families of catalysts, based on Pd nanoparticles supported on ceramic asymmetric tubular alumina membranes, are studies in the direct synthesis of H2O2. They are prepared by depositing Pd in two ways：（i） reduction with N2H4 in an ultrasonic bath and（ii） by impregnation-deposition. The first preparation leads to larger particles, with average size of around 11 nm, while the second preparation leads to smaller particles, with average size around 4 nm. The catalytic membranes were tested as prepared, after thermal treatment in air and after further pre-reduction with H2 in mild（100 ℃） conditions. Samples were characterized by TEM, CO-chemisorption monitored by DRIFTS method and TPR, while catalytic tests have been performed in a semi-batch recirculation membrane reactor. Experimental catalytic results were analysed using two kinetics models to derive the reaction constants for the parallel and consecutive reactions of the kinetic network. Smaller particles of Pd show lower selectivity due to the higher rate of parallel combustion, even if the better dispersion of Pd and thus higher metal surface area in the sample lead to a productivity in H2O2 similar or even higher than the sample with the larger Pd particles. Independently on the presence of smaller or larger Pd nanoparticles, an oxidation treatment leads to a significant enhancement in the productivity, although the catalyst progressively reduces during the catalytic process. The inhibition of the parallel combustion reaction（to water） induced from the calcination treatment remains after the in-situ reduction of the oxidized Pd species formed during the *** is likely due to the elimination of defect sites which dissociatively activate oxygen, and tentatively attributed to Pd sites able to give three- and four-fold coordination of CO.

关键词： H2O2 direct synthesis Pd nanoparticles Kinetics of H2O2 synthesis Pd role in H2O2 synthesis

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_(2) conversion to solar fuels and chemicals:Opening the new paths

引用

Journal of Energy Chemistry 2024年第4期91卷 680-683页

作者： Gabriele Centi Claudio Ampelli Department of Chemical BiologicalPharmaceutical and Environmental Sciences(ChiBioFarAm)University of MessinaERIC aisbl and CASPE/INSTMV.le F.Stagno d'Alcontres 3198166 MessinaItaly

This future article discusses the new prospects and directions of CO_(2)conversion via the photo-electrocatalytic(PEC)*** second(2nd)generation solar fuels and chemicals(SFs)are generated directly in PEC systems via electrons/protons reactions without forming molecular H_(2)as an intermediate,overcoming the thermodynamics limitations and practical issues encountered for electro-fuels produced by multistep thermocatalytic processes(***_(2)conversion with H_(2)coming from water electrolysis).A distributed and decentralized production of SFs requires very compact,highly integrated,and intensified *** the existing reactors of advanced design(based on artificial leaves or photosynthesis),the integrated photovoltaic plus electrocatalytic(PV-EC)device is the only system(demonstrated at large scale)to produce SFs with high solar-to-fuel(STF)***,while the literature indicates STF efficiency as the main(and only)measure of process performance,we remark here the need to refer to productivity(in terms of current density)and make tests with reliable flow PEC systems(with electrodes of at least 5–10 cm^(2))to accelerate the scaling-up *** approaches that minimize downstream separation costs is also *** limitations exist in PEC systems,but most can be overcome by proper electrode and cell engineering,thus going beyond the properties of the *** examples of current developments,we present the progress of(i)artificial leaf/tree devices for green H_(2)distributed production and(ii)a PEC device producing the same chemicals at both cathode and anode parts without downstream operations for green solvent distributed *** on these developments,future directions,such as producing fertilizers and food components from the air,are *** aim is to provide new ideas and research directions from a personal perspective.

关键词： Solar fuels Artificial leaf PEC devices PV-EC devices Cell engineering green H_(2) Chemicals from theair

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

Etherification of HMF to biodiesel additives: The role of NH4+ confinement in Beta zeolites

引用

Journal of Energy Chemistry 2019年第9期28卷 114-121页

作者： Paola Lanzafame Georgia Papanikolaou Katia Barbera Gabriele Centi Siglinda Perathoner Departments of ChiBioFarAm and MIFT-Section of Industrial Chemistry University of Messina ERIC aisbl and CASPE-INSTM

The role of NH4^+ ion confinement in the catalytic etherification of HMF(5-hydroxymethylfurfural) with ethanol to biodiesel additives was evidenced by studying the catalytic behavior of NH4^+-Beta zeolites with SiO2/Al2O3 ratios of 25 and *** order to affect the strength and distribution of the acidic sites, as well as the mobility of NH4^+ ions in the zeolites cages, a secondary level of porosity was introduced in the NH4^+-Beta, presenting a different stability versus alkaline treatment, by using a thermal or an ultrasound assisted *** analyzing the catalytic behavior in these two series of samples with respect to the changes in porosity by nonlocal density functional theory, structure by XRD, amount of acid sites by FT-IR and mobility of NH4^+ cations by measurements of reversible NH4^+ exchange capacity, was evidenced a decrease in catalytic performances both in terms of rate of HMF depletion and productivity to the main products, when confinement of the ammonium ions is lost due to the introduction of *** high capability of ammonium ions release, associated to the mono-dentate configuration,and the minor confinement effect inside the zeolite pore system, due to the more opened pores structure of mesoporous zeolites, hinders both the direct etherification of HMF to EMF [5-(ethoxymethyl)furan-2-carbaldehyde] and the parallel reaction pathway via acetalization, favoring the rapid desorption of the HMFDEA [5-(hydroxymethyl)furfural diethyl acetal] product out of the crystal and the consequent inhibition of the consecutive reactions to EMFDEA [5-(ethoxymethyl)furfural diethyl acetal] and EMF.

关键词： Ammonium ion Beta zeolite HMF etherification Confinement effect 5-(ethoxymethyl)furan-2-carbaldehyde

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

Microstructural Development and Mechanical Properties of PM Ti-45Al-2Nb-2Mn-0.8 vol.%TiB_2 Processed by Field Assisted Hot Pressing

引用

Journal of Materials Science & Technology 2014年第11期30卷 1145-1154页

作者： R.Munoz-Moreno E.M.Ruiz-Navas B.Srinivasarao J.M.Torralba Department of Materials Science and Engineering Universidad Carlos Ⅲ de MadridAvda.Universidad 3028911 LeganésMadridSpain IMDEA Materials Institute C/Eric Kandel 228906 GetafeMadridSpain

A γ-TiAI intermetallic alloy, Ti-45Al-2Nb-2Mn （at.%）-0.8 vol.%TiB2, has been processed from gas atomized praalloyed powder by field assisted hot pressing （FAHP）. An initial analysis of the prealloyed powder helped on the understanding of the intermetallic sintering behavior. Atomized powder consisted of α metastable phase that transformed into α2＋γ equilibrium phases by thermal treating. Different powder particle microstructures were found, which influence the microstructure development of the FAHP T-TiAI material depending on the sintering temperature. Duplex, nearly lamellar and fully lamellar microstructures were obtained at the sintaring temperatures above 1000 ℃. Lower consolidation temperatures, below 1000 ℃, led to the formation of an AI rich phase at powder particle boundaries, which is deleterious to the mechanical properties. High compressive yield strength of 1050 MPa was observed in samples with FAHP duplex microstructures at room temperature. Whereas nearly lamellar and fully lamellar microstructures showed yield strength values of 655 and 626 MPa at room temperature and 440 and 425 MPa at 750 ℃, respectively, which are superior in comparison to similar alloys processed by other techniques. These excellent properties can be explained due to the different volume fractions of the α2 and γ phases and the refinement of the PM microstructures.

关键词： Titanium aluminides Powder metallurgy Microstructure Mechanical properties Field assisted sintering

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：