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Effect of Partial Substitution of Ni by cu in LaNiO_3 Perovskite catalyst for Dry Methane reforming

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催化学报 2012年第5期33卷 797-801页

作者： G.r.MOrADI F.KHOSrAVIAN M.rAHMANZADEH catalyst research center Chemical Engineering DepartmentFaculty of EngineeringRazi UniversityKermanshah 67149-67346Iran

A series of ternary perovskite type oxides LaNi1-xcuxO3(x = 0.2,0.4,0.6,0.8,and 1.0) were synthesized via the sol-gel method in propionic *** substitution of Ni by cu showed higher activities and selectivities towards syngas ***0.8cu0.2O3 was the most active toward the cH4 and cO2 conversions,and was selective for syngas ***-programmed reduction results showed that the addition of cu facilitates the reduction of Ni3+ to Ni0,which is the main reason for the higher performance of this catalyst.

关键词： dry reforming of methane perovskite lanthanun nickel sol-gel method

Insider Attack Detection Using Deep Belief Neural Network in cloud computing

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computer Systems Science & Engineering 2022年第5期41卷 479-492页

作者： A.S.Anakath r.Kannadasan Niju P.Joseph P.Boominathan G.r.Sreekanth School of computing E.G.S.Pillay Engineering CollegeNagapattinam611002TamilnaduIndia Department of Software Systems School of Computer Science and Engineering(SCOPE)Vellore Institute of Technology UniversityVellore632014TamilnaduIndia Department of computer Science CHRIST(Deemed to be University)Bengaluru560029India Department of Information Security School of Computer Science and Engineering(SCOPE)Vellore Institute of Technology UniversityVellore632014TamilnaduIndia Department of computer Science and Engineering Kongu Engineering CollegeErode638060TamilnaduIndia

cloud computing is a high network infrastructure where users,owners,third users,authorized users,and customers can access and store their information *** use of cloud computing has realized the rapid increase of information in every field and the need for a centralized location for processing *** cloud is nowadays highly affected by internal threats of the *** applications such as banking,hospital,and business are more likely affected by real user *** intruder is presented as a user and set as a member of the *** becoming an insider in the network,they will try to attack or steal sensitive data during information sharing or *** major issue in today's technological development is identifying the insider threat in the cloud *** data are lost,compromising cloud users is *** and security are not ensured,and then,the usage of the cloud is not *** solutions are available for the external security of the cloud ***,insider or internal threats need to be *** this research work,we focus on a solution for identifying an insider attack using the artificial intelligence *** insider attack is possible by using nodes of weak users’*** will log in using a weak user id,connect to a network,and pretend to be a trusted ***,they can easily attack and hack information as an insider,and identifying them is very *** types of attacks need intelligent solutions.A machine learning approach is widely used for security *** date,the existing lags can classify the attackers *** information hijacking process is very absurd,which motivates young researchers to provide a solution for internal *** our proposed work,we track the attackers using a user interaction behavior pattern and deep learning *** usage of mouse movements and clicks and keystrokes of the real user is stored in a *** deep belief neural

关键词： cloud computing security insider attack network security privacy user interaction behavior deep belief neural network

SUPErPLASTIcAL DEFOrMATION AND FrAcTUrE MEcHANISM 0F A Sic_p/2024Al cOMPOSITE

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Acta Metallurgica Sinica(English Letters) 1999年第6期12卷 0-0,0-0+0-0+0-0页

作者： Y. Yan c.B. Zhang and B.r. Liu (Box 104, college of Science, Northeastern University Shenyang 110006, china)

Soperplastic tensions on an IM Sicp/2024Al composite were conducted. The microstrvcture and fmcture sudece of the composite under the optimum saperplastic deformation condition were examined. The eoperimental results show that as the increase of strain during superpldstic deformation, grains fundarnentally remained equiaxed structure, and dislocation density increases gradually and its structure changes hem intererossed into nets each other to tangled and cellular structure,and the amount of liquid phase at the intedeces or gruin boundaries increases gradually. Mcrostructure examination revealed that failure took place by damage accumulation of the pmpressive decohesion of the Sic particle-matrix until a critical volume fruction was reached.

关键词： composite superplastic deformation fracture mechanism

First Pig-to-Live Human Xenotransplant Produces Mixed results

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Engineering 2022年第9期16卷 6-8页

作者： Sarah c.P.Williams Senior Technology Writer

On 7 January 2022,a 57-year-old man with terminal heart disease became the first living human to receive a genetically modified pig organ—a heart—transplanted into his chest during a 8 h surgery at the University of Maryland Medical center in Baltimore,MD,USA(Fig.1)[1].The pig heart,provided by the biotechnology company revivicor(Blacksburg,VA,USA),had ten gene modifications intended to boost the chances of a successful pig-to-human transplant.

关键词： Maryland Human boost

The Effability of Semantic relations:Describing Attitude

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外国语 2020年第6期43卷 2-20页

作者： James r.Martin Department of Linguistics University of SydneySydneyNSW 2006AustraliaMartin Centre for Appliable LinguisticsShanghai Jiao Tong UniversityShanghai 200240China

This paper explores some aspects of the problem of developing terminology for attitudinal relations in English,as part of a description of evaluation informed by systemic functional linguistics(SFL)-*** reviews the relational theory of meaning underpinning the description and key dimensions of the Systemic Functional Linguistic theory from which the description is *** issues in the selection of terms and presentation of APPrAISAL systems are then discussed,and suggestions canvassed for possible *** paper highlights the possibilities and challenges involved in naming and presenting semantic relations in descriptions using SFL as their informing theory.

关键词： appraisal attitude ineffability terminology valeur axis

Spatial Variability of Soil Properties at capulin Volcano,New Mexico,USA:Implications for Sampling Strategy

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Pedosphere 2010年第2期20卷 185-197页

作者： D.c.WEINDOrF School of Soil Plant and Environmental SciencesLouisiana State University

Non-agricultural lands are surveyed sparsely in ***,soils in these areas usually exhibit strong spatial variability which requires more samples for producing acceptable *** Volcano National Monument,as a typical sparsely-surveyed area,was chosen to assess spatial variability of a variety of soil properties,and furthermore,to investigate its implications for sampling *** hundred and forty one composited soil samples were collected across the Monument and the surrounding *** properties including pH,organic matter content,extractable elements such as calcium (ca),magnesium (Mg),potassium (K),sodium (Na),phosphorus (P),sulfur (S),zinc (Zn),and copper (cu),as well as sand,silt,and clay percentages were analyzed for each *** of all properties were constructed,standardized,and compared to estimate the spatial variability of the soil properties in the *** on the similarity among standardized semivariograms,we found that the semivariograms could be generalized for physical and chemical properties,*** generalized semivariogram for physical properties had a much greater sill value (2.635) and effective range (7 500 m) than that for chemical *** sampling density (OSD),which is derived from the generalized semivariogram and defines the relationship between sampling density and expected error percentage,was proposed to represent,interpret,and compare soil spatial variability and to provide guidance for sample scheme *** showed that chemical properties exhibit a stronger local spatial variability than soil texture parameters,implying more samples or analysis are required to achieve a similar level of precision.

关键词： generalized semivariogram GIS optimal sampling density sampling design

curing Behaviors and Thermal Properties of Dimer Fatty Acid （DFA） Modified Multifunctional Epoxy resin

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Journal of Donghua University(English Edition) 2013年第6期30卷 525-529页

作者： Yu M.-M. Sun J.-L. ren M.-S. Li A.-J. Bai r.-c. Hu H.-F. research center for composite Materials Shanghai University Shanghai 200072 China Department of Polymer Materials Shanghai University Shanghai 201800 China

In order to improve the toughness of the cured aromatic tetrafunctional epoxy resins, a dlmer rarboxylic acid named dlmer fatty acid （DFA） was used to modify an aromatic tetrafunctional epoxy, N, N, N＇, N＇-tetraglycidyl-2,2-bis [ 4-（ 4-aminophcuoxy ） phenyl ] propane （TGBAPP）. The curing behaviors of DFA- TGBAPP/MNA （ methyl nadic anhydride） systems were studied by differential scanning calorimetry （DSc） method. And the thermal properties of the cured epoxy resin were investigated with the thermo-gravimetric analysis （TGA） and dynamic mechanical analysis （DMA）. Besides, the toughness was characterized with the impact strength tested by charpy impact testing. The results indicated that the modification would improve the curing reactions, and the curing temperatures were decreased with the increasing content of DFA. The thermal properties were not influenced obviously, and the toughness could be improved when the epoxy resin was modified with DFA.

关键词： curing behavior thermal property N, N, N', N'- telraglycidyl-2, 2-bis [ 4-( 4-aminophenoxy ) phenyl ] propane (TGBAPP) dimer fatty acid ( DFA) toughen

response of saproxylic insect communities to logging history, tree species, stage of decay, and wood posture in the central Nearctic boreal forest

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Journal of Forestry research 2018年第5期29卷 1365-1377页

作者： r.W.James Dennis Jay r.Malcolm Sandy M.Smith M.Isabel Bellocq Faculty of Forestry University of Toronto 33 Willcocks St.Toronto ON M5S 3B3 Canada Departamento de Ecología Genética y EvoluciónFacultad de Ciencias Exactas y NaturalesUniversidad de Buenos Aires and IEGEBA (CONICET)Buenos Aires Argentina

Saproxylic insect assemblages are essential functional components of forest ecosystems that can be affected by forest *** used a split-plot ANOVA design to analyze differences in selected saproxylic insects（all arthropod orders and dipteran and parasitic hymenopteran families） emerging from dead wood of sites with different logging histories（horse-logged,mechanically-logged and unlogged）,tree species（Populus and Picea）,stage of decay（early-and late-decay stages） and posture（standing and downed logs） in the boreal forest of central *** clear effects of logging history were seen for the studied taxa; however,interaction between logging history and other dead wood features was *** consistently emerged more from Populus than from Picea dead *** of the studied saproxylic families were more abundant in late-decay than in early-decay *** of the cecidomyiidae,ceratopogonidae,Empididae,Mycetophilidae and Sciaridae families,and hymenopterans of the Diapriidae and Ichneumonidae families were significantly more abundant in downed than in standing dead *** contrast,Mymaridae was most abundant in standing dead *** study provides evidence that some insects at high taxonomic levels respond differently to dead wood quality,and this could inform future management strategies in the boreal forest for the conservation of saproxylic fauna and their ecological functions.

关键词： Boreal forest Dead wood quality Forest harvesting High-level taxa Saproxylic insects

Viability of recalcitrant Araucaria angustifolia seeds in storage and in a soil seed bank

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Journal of Forestry research 2020年第6期31卷 2413-2422页

作者： Ezequiel Gasparin Jose M.r.Faria Anderson cJose Olivia AOTonetti rodrigo Ade Melo Henk W.M.Hilhorst Departamento de ciencias Florestais Universidade Federal de Santa Maria(UFSM)Avenida Roraima1000CamobiSanta MariaRS 97105-900Brazil Departamento de ciencias Florestais Universidade Federal de Lavras(UFLA)Caixa Postal 3017LavrasMGBrazi1 Wageningen Seed Lab Laboratory of Plant PhysiologyWageningen UniversityDroevendaalsesteeg 16708 PB WageningenThe Netherlands

Araucaria angustifolia(Bertol.)Kuntze is a representative species of the Mixed Ombrophilous Forest in the Atlantic Forest Biome of *** development of a germplasm conservation protocol for long-term seed bank storage is compromised for this species,as it is sensitive to ***,in situ establishment of a soil seed bank in its natural habitat may be *** study evaluates the storability of two provenances of *** seeds and their behavior in an artificial soil seed bank in two forest environments(understory and edge).results show that both seed provenances may be stored at 5c for approximately 12 months,retaining high *** subsequent decrease in germination was associated with a reduction and an increase in seed water content,as well as with increased electrical *** the understory environment,seed viability was above 85%for the first 60 days,and at the end of the experiment(270 days),seedlings ***,at the forest edge,there was a total loss of seed viability after 120 days associated with a reduction in water content and high *** is concluded,therefore,that short-term storage of *** seeds is possible in a cold room,which is fundamental to supply seed demand outside the production *** cover conservation is important for regeneration and conservation of the species.

关键词： Brazilian pine Desiccation sensitivity Forest cover Soil seed bank Storability