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Generalized I-Contractions and Pointwise R-Subweakly Commuting Maps

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Acta Mathematica Sinica,English Series 2007年第8期23卷 1505-1508页

作者： d.o'regan N.HUSSAIN department of Mathematics National University of IrelandGalwayIreland department of Mathematics King Abdul Aziz UniversityP.O.Box 80203Jeddah 21589Saudi Arabia

The existence of common fixed points and invariant approximations for pointwise R- subweakly commuting and compatible maps is established. our results unify and generalize various known results to a more general class... 详细信息

关键词： common fixed point pointwise R-subweakly commuting maps tangential maps diminishing orbital diameters invariant approximation

IMPULSIVE dIFFERENTIAL EQUATIoNS WITH GAMMA dISTRIBUTEd MoMENTS oF IMPULSES ANd P-MoMENT EXPoNENTIAL STABILITY

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Acta Mathematica Scientia 2017年第4期37卷 985-997页

作者： R.AGARWAL S.HRISToVA P.KoPANoV d.o'regan department of Mathematics Texas A&M University-KingsvilleKingsvilleTX 78363USA Plovdiv University Tzar Asen 244000 PlovdivBulgaria School of Mathematics Statistics and Applied MathematicsNational University of IrelandGalwayIreland

differential tigated. We study the properties of solutions sufficient conditions for equations with impulses at random moments are set up and invescase of Gamma distributed random moments of impulses. Several are stud... 详细信息

关键词： impulses Gamma distributed moments of impulses p-moment exponentialstability Lyapunov functions

NEW dYNAMIC INEQUALITIES FoR dECREASING FUNCTIoNS ANd THEoREMS oF HIGHER INTEGRABILITY

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Annals of Applied Mathematics 2018年第2期34卷 165-177页

作者： S.H.Saker d.o'regan M.M.osman R.P.Agarwal dept.of Math. Faculty of Science Mansoura University School of Math. Statistics and Applied Math. National University of Ireland dept.of Math. Texas A & M University-Kingsvilie

In this paper we establish some new dynamic inequalities on time scales which contain in particular generalizations of integral and discrete inequalities due to Hardy, Littlewood, Polya, d＇Apuzzo, Sbordone and Popoli... 详细信息

关键词： reverse Holder's inequality Gehring class higher integrability Hardy-Littlewood-Polya inequality time scales

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汽车用聚酰胺纤维全球动向

国际纺织导报 2009年第3期37卷 60-60,62,63页

作者： M．N．Meenakshisundaram d．o’regan H．Khan K．Anderson 汪玲玲（译）立达汽车系统（瑞士）

现今,聚酰胺(PA)纱作为复合地面系统的一部分,为驾驶提供了舒适的环境。但受成本的驱使,新的替代品不断涌现,如聚酯(PET)或聚丙烯(PP)纱线和针刺材料,以及聚乳酸纤维(PLA)和新型聚酯纤维(PTT)等从生物中提炼出的非石油基的材料。此外,... 详细信息

现今,聚酰胺(PA)纱作为复合地面系统的一部分,为驾驶提供了舒适的环境。但受成本的驱使,新的替代品不断涌现,如聚酯(PET)或聚丙烯(PP)纱线和针刺材料,以及聚乳酸纤维(PLA)和新型聚酯纤维(PTT)等从生物中提炼出的非石油基的材料。此外,由于小汽车数量的不断增加,汽车地面系统表层材料将采用针刺地毯复合到簇绒地毯上的新型产品。

关键词：聚酰胺纤维汽车地面系统簇绒针刺

Spatiotemporal distributions of Bacterioplankton Communities in the Qiantang River(Hangzhou Section),China

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Journal of ocean University of China 2024年第4期23卷 1102-1114页

作者： XU Jiaojiao ZHAo Li LUKWAMBE Betina NICHoLAUS regan ZHU Jinyong YANG Wen ZHENG Zhongming School of Marine Sciences Ningbo UniversityNingbo 315211China School of Aquatic Sciences and Fisheries Technology University of Dar es SalaamDar es SalaamTanzania department of Natural Sciences Mbeya University of Science and TechnologyMbeyaTanzania

The spatial and temporal distribution of bacterioplankton communities plays a vital role in understanding the ecological dynamics and health of aquatic *** this study,we conducted a comprehensive investigation of the bacterioplankton communities in the Qiantang River(Hangzhou section).Water samples were collected quarterly from seven sites over a one-year *** and chemical parameters,including dissolved.oxygen(do),water temperature(WT),chemical oxygen demand(Cod),nitrite(No_(2)^(-)),active phosphate(Po_(4)^(3-))and.other indices were *** this study,theαdiversity,βdiversity and abundance differences of bacterial communities were investigated using 16S rRNA high-throughput sequencing *** spatial and temporal distribution characteristics and main driving factors of the bacterioplankton community structure and diversity were *** results showed that a total of 57 phyla were detected in the bacterioplankton community,among which Proteobacteria and Actinomycetes were the two dominant groups with the highest relative *** results of PCoA based.on Bray-Curtis distance showed that the sampling season had a slightly greater effect on the changes in bacterioplankton community structure in the Qiantang *** and partial Mantel test showed that environmental variables(Mantel r=0.6739,Pore important than geographical distance(Mantel r=0.5322,Pdistance attenuation model showed that there was significant distance attenuation in all four seasons,and the maximum limit of bacterial community diffusion was found in *** analysis showed that nine environmental factors,including Cod,WT and do,significantly affected community distribution(Pdy provides valuable insights into the spatial and temporal distribution characteristics of bacterioplankton communities,shedding light on their ecological roles in the Qiantang R

关键词： Qiantang River bacterioplankton community spatial and temporal distribution 16S rRNA range attenuation

Highly defective dark Tio_(2) Modified with Pt: Effects of Precursor Nature and Preparation Method.on Photocatalytic Properties

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Transactions of Tianjin University 2024年第2期30卷 198-209页

作者： E.d.Fakhrutdinova o.A.Reutova T.A.Bugrova I.Yu.ovsyuk L.S.Kibis o.A.Stonkus d.B.Vasilchenko o.V.Vodyankina V.A.Svetlychnyi National Research Tomsk State University TomskRussia 634050 Novosibirsk State University NovosibirskRussia 630090 Boreskov Institute of Catalysis NovosibirskRussia 630090 Nikolaev Institute of Inorganic Chemistry NovosibirskRussia 630090

The study focused.on the modification with platinum of dark defective titania obtained via pulsed laser ablation. Both the method.of Pt introduction and the nature of the Pt precursor were varied. All samples exhibited similar phase compositions, specific surface areas, and Pt contents. High-resolution transmission electron microscopy coupled with pulsed Co ad.orption revealed increased dispersity when photoreduction and the hyd.oxonitrate complex (Me _(4) N) _(2) [Pt _(2) (oH) _(2) (No _(3) ) _(8) ] were used. The sample featured a high content of single-atom species and subnano-sized Pt clusters. The X-ray photoelectron spectroscopy results showed that the photoreduction method facilitated the appearance of a larger number of Pt ^(2+) states, which appeared.owing to the strong metal-support interaction (SMSI) eff ect of the transfer of electron density from the electron-saturated defects on the Tio _(2) surface to Pt ^(4+) . In the hyd.ogen evolution reaction, samples with a significant fraction of the Pt ^(2+) ionic component, capable of generating short-lived Pt^(0) single-atom sites under irradiation due to the SMSI eff ect, exhibited the highest photocatalytic activity. The 0.5Pt(C)/Tio_(2) -Ph sample exhibited the highest hyd.ogen yield with a quantum efficiency of 0.53, retaining its activity even after 8 h of operation.

关键词： dark(black)Tio_(2) Pulsed laser ablation Platinum reduction method Precursor type Photocatalysis Hyd.ogen evolution reaction

development and testing of a high-power S-band klystron at BINP SB RAS

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Nuclear Science and Techniques 2024年第7期35卷 58-67页

作者： A.Levichev A.Barnyakov S.Samoylov d.Nikiforov V.Ivanov M.Arsentyeva d.Chekmenev o.Pavlov I.Pivovarov Budker Institute of Nuclear Physics Lavrentyeva Av.11NovosibirskRussia630090 Novosibirsk State University Pirogova Str.2NovosibirskRussia630090

This paper details the development and testing of the first working prototype of the S-band high-power klystron,accomplished at the Budker Institute of Nuclear Physics,Siberian Branch,Russian Academy of Sciences(BINP SB RAS).Upon testing,the klystron demonstrated the following parameters:an operating frequency of 2856 MHz and a peak power output of 50 *** paper presents the klystron's design,its constituent units,and pertinent processing procedures,along with discussions on the measurement of its parameters.

关键词： Klystron Linear accelerator Electron beam

Sustainable Biocomposites Materials for Automotive Brake Pad Application:An overview

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Journal of Renewable Materials 2024年第3期12卷 485-511页

作者： Joseph o.dirisu Imhade P.okokpujie olufunmilayo o.Joseph Sunday o.oyedepo oluwasegun Falodun Lagouge K.Tartibu Firdaussi d.Shehu department of Mechanical Engineering Covenant UniversityOtaOgunNigeria department of Mechanical and Mechatronics Engineering AFE Babalola UniversityAdoEkitiNigeria department of Mechanical and Industrial Engineering Technology University of JohannesburgJohannesburg2028South Africa School of Chemical and Metallurgical Engineering University of the WitwatersrandJohannesburgSouth Africa

Research into converting waste into viable eco-friendly products has gained global *** natural fibres and pulverized metallic waste becomes necessary to reduce noxious environmental emissions due to indiscriminately occupying the *** study reviews the literature in the broad area of green composites in search of materials that can be used in automotive brake *** made by biocomposite,rather than fossil fuels,will be favoured.A database containing the tribo-mechanical performance of numerous potential components for the future green composite was established using the technical details of bio-polymers and natural *** development of materials with diverse compositions and varying proportions is now conceivable,and these materials can be permanently connected in fully regulated *** explanation demonstrates that all of these variables affect friction coefficient,resistance to wear from friction and high temperatures,and the operating life of brake pads to varying *** this study,renewable materials for the matrix and reinforcement are screened to determine which have sufficient strength,coefficient of friction,wear resistance properties,and reasonable costs,making them a feasible option for a green *** most significant,intriguing,and unusual materials used in manufacturing brake pads are gathered in this review,which also analyzes how they affect the tribological characteristics of the pads.

关键词： Asbestos brake pad biocomposites green composite mechanical properties natural reinforcement waste

Steroidal scaffold decorations in Solanum alkaloid biosynthesis

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Molecular Plant 2024年第8期17卷 1236-1254页

作者： Rosalind Lucier Mohamed.o.Kamileen Yoko Nakamura Sofiia Serediuk Ranjit Barbole Jens Wurlitzer Maritta Kunert Sarah Heinicke Sarah E.o'Connor Prashant d.Sonawane department of Natural Product Biosynthesis Max Planck Institute for Chemical Ecology07745 JenaGermany Research Group Biosynthesis and NMR Max Planck Institute for Chemical Ecology07745 JenaGermany Biochemical Sciences division CSIR-National Chemical LaboratoryPune 411008MaharashtraIndia

Steroidal glycoalkaloids(SGAs)are specialized metabolites produced by hundreds of Solanum species,including important vegetable crops such as tomato,potato,and *** it has been known that SGAs play important roles in defense in plants and“anti-nutritional"effects(e.g.,toxicity and bitterness)to humans,many of these molecules have documented anti-cancer,anti-microbial,antiinflammatory,anti-viral,and anti-pyretic *** these,α-solasonine andα-solamargine isolated from black nightshade(Solanum nigrum)are reported to have potent anti-tumor,anti-proliferative,and anti-inflammatory ***,α-solasonine andα-solamargine,along with the core steroidal aglycone solasodine,are the most widespread SGAs produced among the Solanum ***,it is still unknown how plants synthesize these bioactive steroidal *** comparative metabolomictranscriptome-guided approach,biosynthetic logic,combinatorial expression in Nicotiana benthamiana,and functional recombinant enzyme assays,here we report the discovery of 12 enzymes from *** that converts the starting cholesterol precursorto solasodine aglycone,and the downstreamα-solasonine,α-solamargine,and malonyl-solamargine SGA *** further identified six enzymes from cultivated eggplant that catalyze the production ofα-solasonine,α-solamargine,and malonyl-solamargine SGAs from solasodine aglycone via glycosylation and atypical malonylation *** work provides the gene tool box and platform for engineering the production of high-value,steroidal bioactive molecules inheterologoushosts usingsyntheticbiology.

关键词： steroidal glycoalkaloids Solanum biosynthetic pathway α-solamargine malonyl-solamargine specialized metabolites