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Progress in Natural Science:Materials International 2013年第1期23卷 23-35页

作者： Ramzi Chalghaf Walid Oueslati Marwa Ammar Hafsia ben Rhaiem Abdesslem ben Haj Amara UR05/13-01:Physique des Matériaux Lamellaires et Nanomatériaux Hybrides(PMLNMH) Facultédes Sciences de BizerteZarzouna 7021Tunisia

This work aims at investigating the strain effect,created by varying pH solution and continuous heating cycle,on the cation exchange process in the case of Na-rich montmorillonite sample in contact with bi-ionic solution with variable concentration,saturated respectively by Co2+ and Cu2+ *** ionic exchange process is characterized using XRD analysis obtained through the comparison of experimental XRD patterns with calculated ones,which allowed us to determine several structural parameters related to the nature,abundance,size,position and organization of exchangeable cation and water molecule in the interlamellar space along the ***,the proposed theoretical models,for the stressed samples,show that the structure presents an interstratified hydration character and proves the coexistence of more than two ''crystallite'' specie in the *** perturbation types have an obvious effect on the selective exchange process for all stressed samples,where the interlayer space is characterized by the coexistence of more one exchangeable cation.

关键词： geological membrane Soil decontamination Alkaline strain Thermal stress Quantitative XRD analysis Ionic exchange process

Regional trends and petrologic factors inhibit global interpretations of zircon trace element compositions

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geoscience Frontiers 2024年第5期15卷 300-307页

作者： Nick M.W.Roberts Christopher j.Spencer Stephen Puetz C.Brenhin Keller simon Tapster geochronology and Tracers Facility British Geological SurveyNottingham NG125GGUK Department of geological Sciences and geological Engineering Queen’s UniversityKingstonOntarioCanada 475 Atkinson Dr Suite 704HonoluluHI 96814USA Department of Earth Sciences Dartmouth CollegeHanoverNew HamphireUSA

The trace element composition of zircon reveals information about the melt that they are derived from,as such,detrital zircon trace element compositions can be used to interrogate melt compositions,and thus the evolution of the continental crust in time and ***,we present a global database of detrital zircon compositions and use it to test whether average global trends for five common petrogenetic proxies truly represent secular changes in continental *** demonstrate that the secular trend is broadly comparable across continental regions for Ti-in-zircon temperatures,but for other trace element ratios interrogated,secular trends are highly variable between continental *** trace element ratios result from multiple petrologic variables,we argue that these petrogenetic proxies can be overinterpreted if projected to global geologic *** particular,we caution against the interpretation of crustal thickness from trace elements in zircon,and we argue that our results negate current hypotheses concerning secular changes in crustal thickness.

关键词： Detrital zircon Trace elements Secular change Eu anomaly Crustal thickness

Oil-bearing fluid inclusions from the Palaeoproterozoic:A review of biogeochemical results from time-capsules >2.0 ga old

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Science China Earth Sciences 2009年第1期52卷 1-11页

作者： simon C. gEORgE Adriana DUTKIEWICZ Herbert VOLK john RIDLEY David j. MOSSMAN Roger BUICK Department of Earth and Planetary Sciences Macquarie University School of geosciences University of Sydney CSIRO Petroleum Department of geosciences Colorado State University Department of geography Mount Allison University Department of Earth and Space Sciences & Astrobiology Program University of Washington

The observation of oil inclusions trapped prior to 2.0 ga in Palaeoproterozoic rocks and the ability to obtain detailed molecular geochemical information from them provide a robust way for understanding the early biog... 详细信息

关键词： Palaeoproterozoic fluid inclusion oil biomarker blank

Film cooling performance and flow structure of single-hole and double-holes with swirling jet

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Chinese journal of Aeronautics 2022年第3期35卷 201-213页

作者： Rui ZHU simon TERRENCE Shulei LI gongnan XIE School of Mechanical Engineering Northwestern Polytechnical UniversityXi’an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China Department of Mechanical Engineering University of MinnesotaMinneapolisMN 55455USA School of Marine Science and Technology Northwestern Polytechnical UniversityXi’an 710072China

This paper presents the results of a numerical study of the effects of swirling flow in coolant jets on film cooling *** combined-hole designs with swirling coolant flow entering the delivery hole are proposed and *** film cooling effectiveness values for cases with various blowing ratios are *** flow structures and underlying mechanisms are *** results show that film cooling effectiveness is improved with jet swirl at high blowing ratios,and that swirl strength has significant influence on film cooling ***-hole designs can further improve film cooling performance using swirling jets due to mixing of coolant flows and interaction of *** largest improvements of area-averaged film cooling effectiveness for a single-hole swirl case and a combined-hole swirl case over corresponding non-swirling case results are 157%and 173%,respectively.

关键词： Combined-hole Film cooling Interactions of vortices jet-in-cross-flow Swirling flow

Classifying handedness in chiral nanomaterials using label error robust deep learning

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npj Computational Materials 2022年第1期8卷 1417-1423页

作者： C.K.groschner Alexander j.Pattison Assaf ben-Moshe A.Paul Alivisatos Wolfgang Theis M.C.Scott Department of Materials Science and Engineering UC BerkeleyBerkeleyCAUSA School of Physics and Astronomy University of BirminghamBirminghamUK Department of Chemistry University of CaliforniaBerkeleyBerkeleyCAUSA Materials Sciences Division Lawrence Berkeley National LaboratoryBerkeleyCAUSA Molecular Foundry Lawrence Berkeley National LaboratoryBerkeleyBerkeleyCAUSA

High-throughput scanning electron microscopy(SEM)coupled with classification using neural networks is an ideal method to determine the morphological handedness of large populations of chiral *** labeling removes the time-consuming manual labeling of training data,but introduces label error,and subsequently classification error in the trained neural ***,we evaluate methods to minimize classification error when training from automated labels of SEM datasets of chiral Tellurium *** the mirror relationship between images of opposite handed particles,we artificially create populations of varying label *** analyze the impact of label error rate and training method on the classification error of neural networks on an ideal dataset and on a practical *** the three training methods considered,we find that a pretraining approach yields the most accurate results across label error rates on ideal datasets,where size and other morphological variables are held constant,but that a co-teaching approach performs the best in practical application.

关键词： error chiral remove

Syntheses and Crystal Structures of Two Complexes with 3-(3-Pyridyl)acrylic Acid

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Chinese journal of Structural Chemistry 2005年第10期24卷 1123-1128页

作者： HUANg You-gui ZHOU You-Fu WU ben-Lai HAN Lei YUAN Da-Qiang LOU ben-Yong HONg Mao-Chun State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

The reaction of 3-（3-pyridyl）acrylic acid （H（3-PYA）） with Co（NO3）2.6H2O or MnCl2.4H2O yielded two new complexes： [Co（3-PYA）2（H2O）4.H2O] 1 and [Mn（3-PYA）2（H2O）4] 2. Complex 1 crystallizes in monoclinic, space group C2/c with a = 9.9473（12）, b = 13.7227（16）, c = 14.7376（18） A, β = 99.043（2）°, V = 1986.7（4） A^3, Z = 4, Dc= 1.549 g/cm^3,μ = 0.921 mm^-1, F（000） = 964, R = 0.0786 and wR = 0.1443. Six types of hydrogen bonds and π-π packing interactions connect the mononuclear units [Co（Ⅱ）（3-PYA）2（H2O）4·H2O] into a three-dimensional supramolecular architecture. Complex 2 crystallizes in monoclinic, space group P21/n with a = 11.3630（16）, b = 7.0346（10）, c = 12.1365（18） A, β = 112.545（3）°, V = 896.0（2） A^3, Z = 2, D, = 1.997 g/cm^3,μ = 0.785 mm^-1, F（000） = 438, R = 0.0787 and wR = 0.1550. The discrete entity Mn（Ⅱ）（3-PYD）2（H2O）4 is extended into a 3-D supramolecular architecture by four kinds of hydrogen bonds.

关键词： crystal structure hydrogen bonding 3-(3-pyridyl)acrylic acid cobalt manganese

A hybrid original approach for prediction of the aerodynamic coefficients of an ATR-42 scaled wing model

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Chinese journal of Aeronautics 2016年第1期29卷 41-52页

作者： Abdallah ben Mosbah Ruxandra Mihaela Botez Thien My Dao Department of Automated Production Engineering Ecole de Technologie SuperieureUniversity of QuebecLaboratory of Applied Research in Active ControlsAvionics and AeroServoElasticity LARCASEMontrealQuebec H3C-1K3Canada Department of Mechanical Engineering Ecole de Technologie SuperieureUniversity of QuebecMontrealQuebec H3C-1K3Canada

A new approach for the prediction of lift, drag, and moment coefficients is presented. This approach is based on the support vector machines （SVMs） methodology and an optimization meta-heuristic algorithm called extended great deluge （EgD）. The novelty of this approach is the hybridization between the SVM and the EgD algorithm. The EgD is used to optimize the SVM parameters. The training and validation of this new identification approach is realized using the aerodynamic coefficients of an ATR-42 wing model. The aerodynamic coefficients data are obtained with the XFoil software and experimental tests using the Price-Paidoussis wind tunnel. The predicted results with our approach are compared with those from the XFoil software and experimental results for different flight cases of angles of attack and Mach numbers. The main pur- pose of this methodology is to rapidly Predict aircraft aerodynamic coefficients.

关键词： Aerodynamic coefficients Estimation Extended great deluge Metaheuristic Model identification Optimization Support vector machines Wind tunnel tests

Three-dimensionally interconnected Co9S8/MWCNTs composite cathode host for lithium–sulfur batteries

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journal of Energy Chemistry 2020年第7期29卷 22-29,I0002页

作者： Shengyu Zhao Xiaohui Tian Yingke Zhou ben Ma Angulakshmi Natarajan The State Key Laboratory of Refractories and Metallurgy Institute of Advanced Materials and NanotechnologyCollege of Materials and MetallurgyWuhan University of Science and TechnologyWuhan 430081 HubeiChina

Several challenging issues,such as the poor conductivity of sulfur,shuttle effects,large volume change of cathode,and the dendritic lithium in anode,have led to the low utilization of sulfur and hampered the commercialization of lithium–sulfur *** this study,a novel three-dimensionally interconnected network structure comprising Co9 S8 and multiwalled carbon nanotubes(MWCNTs)was synthesized by a solvothermal route and used as the sulfur *** assembled batteries delivered a specific capacity of1154 m Ah g-1 at 0.1 C,and the retention was 64%after 400 cycles at 0.5 *** polar and catalytic Co9 S8 nanoparticles have a strong adsorbent effect for polysulfide,which can effectively reduce the shuttling ***,the three-dimensionally interconnected CNT networks improve the overall conductivity and increase the contact with the electrolyte,thus enhancing the transport of electrons and Li *** adsorption is greatly increased with the synergistic effect of polar Co9 S8 and MWCNTs in the three-dimensionally interconnected composites,which contributes to their promising performance for the lithium–sulfur batteries.

关键词： Three-dimensional network structure MWCNTs Polar and catalytic Co9S8 Lithium–sulfur batteries

Interference suppression for ultra dense network based on compressive sensing framework

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The journal of China Universities of Posts and Telecommunications 2020年第2期27卷 10-18页

作者： Hou Huanhuan jiang jing Lei Ming Liu ben School of Communications and Information Engineering Xi'an Universityof Posts and TelecommunicationsXi'an 710061China

Ultra-dense network(UDN)deployment of small cells introduces novel technical challenges,one of which is that the interference levels increase considerably with the network *** paper proposes interference suppression scheme based on compressive sensing(CS)framework for ***,the measurement matrix is designed by exploiting the sparsity of millimeter wave *** technique is employed to transform the high dimension sparse signal into low dimension ***,the interference is canceled in the compressed ***,the stagewise weak orthogonal matching pursuit(SWOMP)algorithm is used to reconstruct the useful signal after interference *** analysis and simulation results demonstrate the effectiveness of the *** results demonstrate that the proposed interference suppression in compressive domain yields performance gains compared to other classical interference suppression *** proposed algorithm can reduce the computational complexity of interference suppression algorithm.

关键词： interference suppression CS signal reconstruction UDN

Structural Basis of Interaction of Bipartite Nuclear Localization Signal from Agrobacterium VirD2 with Rice Importin-o

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Molecular Plant 2014年第6期7卷 1061-1064页

作者： Chiung-Wen Chang, simon j. Williams, Rafael Miguez Cou?ago Bostjan Kobe School of Chemistry and Molecular Biosciences Institute for Molecular Bioscience and Australian Infectious Diseases ResearchCentre University of Queensland Brisbane Qld 4072 Australia

Dear Editor, In the eukaryotic cell, the nuclear envelope separates genomic DNA from the rest of the cell, but ensures a molecu- lar communication between the nucleus and the cytoplasm through the nuclear pore complexes （NPCs）. Nuclear trans- port of macromolecules is an energy-dependent process, exemplified by the classical nuclear import pathway. In the cytoplasm, proteins containing classical nuclear localization signals （cNLSs） are recognized by a hetero-dimeric transport receptor （importin-α （Impα）：importin-β （Impl3） complex）. Impa is employed as an adaptor protein that specifically rec-ognizes the classical nuclear localization signal （cNLS） from the cargo protein （Marfori et al., 2011）. Translocation of the trimeric cargo：transport receptor import complex through the NPCs is mediated by transient interactions between Impβ and nucleoporins in the NPC. The directionality of the trans- port is imparted by the asymmetric distribution, between the cytoplasm and the nucleus, of the distinct nucleotide-bound （gTP/gDP） states of the small gTPase Ran （Tran et al., 2007）.

关键词： AgROBACTERIUM RESEARCH PLANT proteins PLANT proteins -- Structure PLANT cell nuclei CRYSTAL structure CARRIER proteins -- Molecular structure CARRIER proteins RICE -- Research