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Journal of Advanced Dielectrics 2015年第3期5卷 59-64页

作者： k.Abu-Elabass Department of Machinery and Electrical Equipment Prince Sultan Industrial Institute Defense Ministry Al-Kharj Kingdom of Saudi Arabia

In this study,a possible method of reducing the flashover stress is achieved by the effect of an additional magnetic field in the transverse direction on the main applied electric *** degree of vacuum used in this study was 5×10^(5) *** magnetic flux density B employed in this study extends from 4×10^(3) to 24×10^(3) *** the results obtained throughout this work,the transverse magnetic field increases the flashover voltage and decreases the leakage *** effect of the transverse magnetic field on the surface flashover of the dielectric solid in vacuum shows a marked dependence on the material and the thickness of the test specimen,the vacuum degree,the type of electric field(AC or DC)as well as the type of magnetic field(AC or DC).

关键词： Surface flashover voltage solid dielectrics magnetic field vacuum

Mapping the habitat suitability of Ottelia species in Africa

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Plant Diversity 2022年第5期44卷 468-480页

作者： Boniface k.Ngarega John M.Nzei Josphat k.Saina Marwa waseem A.Halmy Jin-Ming Chen Zhi-Zhong Li key Laboratory of Aquatic Botany and watershed Ecology Wuhan Botanical GardenChinese Academy of SciencesWuhan430074China Center of Conservation Biology Core Botanical GardensChinese Academy of SciencesWuhan430074China University of Chinese Academy of Sciences Beijing100049China Center for Integrative Conservation Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglun666303China Department of Environmental Sciences Faculty of ScienceAlexandria UniversityAlexandria21511Egypt

Understanding the influence of environmental covariates on plant distribution is critical,especially for aquatic plant *** change is likely to alter the distribution of aquatic ***,knowledge of this change on the burden of aquatic macroorganisms is often fraught with ***,a model genus for studying the evolution of the aquatic family Hydrocharitaceae,is mainly distributed in slow-flowing creeks,rivers,or lakes throughout pantropical regions in the *** to recent rapid climate changes,natural Ottelia populations have declined *** modeling the effects of climate change on the distribution of Ottelia species and assessing the degree of niche similarity,we sought to identify high suitability regions and help formulate conservation *** models use known background points to determine how environmental covariates vary spatially and produce continental maps of the distribution of the Ottelia species in ***,we estimated the possible influences of the optimistic and extreme pessimistic representative concentration pathways scenarios RCP 4.5 and RCP 8.5 for the *** results show that the distinct distribution patterns of studied Ottelia species were influenced by topography(elevation)and climate(e.g.,mean temperature of driest quarter,annual precipitation,and precipitation of the driest month).while there is a lack of accord in defining the limiting factors for the distribution of Ottelia species,it is clear that water-temperature conditions have promising effects when kept within optimal *** also note that climate change will impact Ottelia by accelerating fragmentation and habitat *** assessment of niche overlap revealed that Ottelia cylindrica and *** had slightly more similar niches than the other Ottelia *** present findings identify the need to enhance conservation efforts to safeguard natural Ottelia populations and provide a theoretical basis for the distr

关键词： African freshwater bodies Climate change Ecological niche modeling Habitat suitability Niche overlap

Diversifying Resistance Mechanisms in Cereal Crops Using Microphenomics

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Plant Phenomics 2023年第1期5卷 1-5页

作者： Peter M.Dracatos Stefanie Lück Dimitar k.Douchkov Department of Animal Plant and Soil SciencesAgriBioLa Trobe UniversityBundooraVIC 3086Australia Leibniz Institute of Plant Genetics and Crop Plant Research(IPk)Gatersleben Corrensstrasse 306466 Seeland OT GaterslebenGermany

hole-grain cereals,including wheat,barley,oat,rye,corn,rice,millet,and triticale,are a rich source of calories,essential vitamins,minerals,and phytochemicals that both nourish and protect humans and animals from diseases such as heart attack and cancer[1].However,susceptibility to foliar diseases caused by necrotrophic or biotrophic fungal pathogens continues to reduce yield potential or lead to total crop failure and famine in developing nations[2].Historically,foliar diseases of cereals have been controlled using either fungicide treatment[3]or plant breeding[4].

关键词： breeding cereal corn

Capillary electrophoresis methods for impurity profiling of drugs:A review of the past decade

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Journal of Pharmaceutical Analysis 2022年第1期12卷 15-28页

作者： Mansi Shah Nrupesh Patel Nagja Tripathi Vivek k.Vyas Department of Pharmaceutical Analysis Institute of PharmacyNirma UniversityAhmedabad382481GujaratIndia Department of Pharmacognosy Institute of PharmacyNirma UniversityAhmedabad382481GujaratIndia Department of Pharmaceutical Chemistry Institute of PharmacyNirma UniversityAhmedabad382481GujaratIndia

Capillary electrophoresis(CE)is widely used for the impurity profiling of drugs that contain stereochemical centers in their structures,analysis of biomolecules,and characterization of ***,CE is the method of choice for the analysis of foodstuffs and the determination of *** article discusses the general theory and instrumentation of CE as well as the classification of various CE *** also presents an overview of research on the applications of different CE techniques in the impurity profiling of drugs in the past *** review briefly presents a comparison between CE and liquid chromatography methods and highlights the strengths of CE using drug compounds as *** review will help scientists,fellow researchers,and students to understand the applications of CE techniques in the impurity profiling of drugs.

关键词： Capillary electrophoresis Impurities Impurity profiling Drugs

Improved mechanical properties in titanium matrix composites reinforced with quasi-continuously networked graphene nanosheets and in-situ formed carbides

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Journal of Materials Science & Technology 2022年第1期96卷 85-93页

作者： Q.Yan B.Chen L.Cao k.Y.Liu S.Li L.Jia k.kondoh J.S.Li State key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China School of Materials Science and Engineering Xi’an University of TechnologyXi’an 710048China Joining and welding Research Institution Osaka University11-1 MihogaokaIbarakiOsaka 567-0047Japan

In order to construct quasi-continuously networked reinforcement in titanium(Ti)matrix composites,in this study,Ti-6 Al-4 V spherical powders were uniformly coated with a graphene nanosheet(GNS)layer by high energy ball milling and then consolidated by spark plasma *** showed that the GNS layer on the powder surface inhibited continuous metallurgy bonding between powders during sintering,which led to the formation of quasi-networked hybrid reinforcement structure consisting of insitu Ti C and remained *** networked GNSs/Ti64 composite possessed noticeably higher tensile strength but similar ductility to the Ti64 alloy,leading to both better tensile strength and ductility than the GNSs/Ti composite with randomly dispersed GNSs and Ti *** formation mechanism and the fracture mechanism of the networked hybrid reinforcement were *** results provided a method to fabricate Ti matrix composites with high strength and good ductility.

关键词： Titanium matrix composites(TMCs) Graphene Network structure Strength Ductility

Evaluation of Postharvest Senescence of Broccoli via Hyperspectral Imaging

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Plant Phenomics 2022年第1期4卷 298-309页

作者： Xiaolei Guo Yogesh k.Ahlawat Tie Liu Alina Zare University of Florida Department of Electrical and Computer EngineeringGainesvilleFloridaUSA University of Florida Horticultural Sciences DepartmentGainesvilleFloridaUSA

Fresh fruit and vegetables are invaluable for human health;however,their quality often deteriorates before reaching consumers due to ongoing biochemical processes and compositional *** currently lack any objective indices which indicate the freshness of fruit or vegetables resulting in limited capacity to improve product quality eventually leading to food loss and waste.

关键词： eventually indices vegetables

Type Ia Supernova Explosions in Binary Systems:A Review

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Research in Astronomy and Astrophysics 2023年第8期23卷 10-52页

作者： Zheng-wei Liu Friedrich k.Röpke Zhanwen Han Yunnan Observatories Chinese Academy of Sciences(CAS)Kunming 650216China key Laboratory for the Structure and Evolution of Celestial Objects CASKunming 650216China International Centre of Supernovae Yunnan Key LaboratoryKunming 650216China University of Chinese Academy of Sciences Beijing 100049China Zentrum für Astronomie der Universität Heidelberg Institut für Theoretische AstrophysikPhilosophenweg 12D-69120 HeidelbergGermany Heidelberger Institut für Theoretische Studien Schloss-Wolfsbrunnenweg 35D-69118 HeidelbergGermany

Type Ia supernovae(SNe Ia)play a key role in the fields of astrophysics and *** is widely accepted that SNe Ia arise from thermonuclear explosions of white dwarfs(wDs)in binary ***,there is no consensus on the fundamental aspects of the nature of SN Ia progenitors and their actual explosion *** fundamentally flaws our understanding of these important astrophysical *** this review,we outline the diversity of SNe Ia and the proposed progenitor models and explosion *** discuss the recent theoretical and observational progress in addressing the SN Ia progenitor and explosion mechanism in terms of the observables at various stages of the explosion,including rates and delay times,pre-explosion companion stars,ejecta–companion interaction,early excess emission,early radio/X-ray emission from circumstellar material interaction,surviving companion stars,late-time spectra and photometry,polarization signals and supernova remnant *** the efforts from both the theoretical and observational sides,questions of how the wDs reach an explosive state and what progenitor systems are more likely to produce SNe Ia remain *** single published model is able to consistently explain all observational features and the full diversity of SNe *** may indicate that either a new progenitor paradigm or an improvement in current models is needed if all SNe Ia arise from the same *** alternative scenario is that different progenitor channels and explosion mechanisms contribute to SNe *** the next decade,the ongoing campaigns with the James webb Space Telescope,Gaia and the Zwicky Transient Facility,and upcoming extensive projects with the Vera *** Observatory's Legacy Survey of Space and Time and the Square kilometre Array will allow us to conduct not only studies of individual SNe Ia in unprecedented detail but also systematic investigations for different subclasses of SNe *** will advance theory and observation

关键词： (stars:)binaries(including multiple) close-methods numerical-(stars )supernovae general

China and India:An Era of Escalating Economic Interaction

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China & world Economy 2006年第4期14卷 105-119页

作者： Dilip k.Das Professor of International Economics School of BusinessConestoga CollegeOntarioCanada.

As ancient civilizations China and India had close cultural and commercial ties, but they drifted apart after eleventh century until the mid-twentieth century. In the 1990s, the two emerging-market economies once again began to interact and become economically close. The bilateral relationship was strengthened by political initiatives and determination from both sides. Their mutual trade and investment are on the rise and their new relationship has been evolving in accordance with the new diplomatic stance of conciliation. The bilateral economic bonds are likely to involve both competitive and collaborative dimensions. The two neighbors have determined to develop more extensive cooperation in regional and international affairs.

关键词： Chinese economy competition cooperation Indian economy interaction

Plasmon-induced trap filling at grain boundaries in perovskite solar cells

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Light(Science & Applications) 2021年第11期10卷 2233-2244页

作者： kai Yao Siqi Li Zhiliang Liu Yiran Ying Petr Dvořák Linfeng Fei TomášŠikola Haitao Huang Peter Nordlander Alex k-Y.Jen Dangyuan Lei Institute of Photovoltaics/Department of Materials Science and Engineering Nanchang UniversityNanchang330031China Department of Applied Physics The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Materials Science and Engineering City University of Hong KongKowloonHong KongChina Institute of Physical Engineering Brno University of TechnologyTechnická2Brno61669Czech Republic Laboratory for Nanophotonics Department of Physics and AstronomyDepartment of Electrical and Computer EngineeringRice UniversityHoustonTexas77005USA

The deep-level traps induced by charged defects at the grain boundaries(GBs)of polycrystalline organic-inorganic halide perovskite(OIHP)films serve as major recombination centres,which limit the device ***,we incorporate specially designed poly(3-aminothiophenol)-coated gold(Au@PAT)nanoparticles into the perovskite absorber,in order to examine the influence of plasmonic resonance on carrier dynamics in perovskite solar *** changes in the photophysical properties of the OIHP films reveal that plasmon excitation could fill trap sites at the GB region through photo-brightening,whereas transient absorption spectroscopy and density functional theory calculations correlate this photo-brightening of trap states with plasmon-induced interfacial *** a result,the device achieved the best efficiency of 22.0%with robust operational *** work provides unambiguous evidence for plasmon-induced trap occupation in OIHP and reveals that plasmonic nanostructures may be one type of efficient additives to overcome the recombination losses in perovskite solar cells and thin-film solar cells in general.

关键词： perovskite grain absorber

Predictive active control of building structures using LQR and artificial intelligence

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 489-502页

作者： Nirmal S.Mehta Vishisht Bhaiya k.A.Patel Ehsan Noroozinejad Farsangi Department of Civil Engineering SVNIT SuratGujarat 395007India Urban Transformations Research Centre Western Sydney UniversityNSWAustralia

This study presents a neural network-based model for predicting linear quadratic regulator(LQR)weighting matrices for achieving a target response *** on the expected weighting matrices,the LQR algorithm is used to determine the various responses of the *** responses are determined by numerically analyzing the governing equation of motion using the state-space *** training a neural network,four input parameters are considered:the time history of the ground motion,the percentage reduction in lateral displacement,lateral velocity,and lateral acceleration,Output parameters are LQR weighting *** study the effectiveness of an LQR-based neural network(LQRNN),the actual percentage reduction in the responses obtained from using LQRNN is compared with the target percentage ***,to investigate the efficacy of an active control system using LQRNN,the controlled responses of a system are compared to the corresponding uncontrolled *** trained neural network effectively predicts weighting parameters that can provide a percentage reduction in displacement,velocity,and acceleration close to the target percentage *** on the simulation study,it can be concluded that significant response reductions are observed in the active-controlled system using ***,the LQRNN algorithm can replace conventional LQR control with the use of an active control system.

关键词： active control system linear quadratic regulator artificial neural networks state-space approach response effectiveness factor resilience