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Communications in Theoretical Physics 2024年第4期76卷 22-31页

作者： Yusry o El-Dib Department of Mathematics Faculty of EducationAin Shams UniversityRoxyCairoEgypt

The time-delayed fractal Van der Pol–Helmholtz–Duffing(VPHD)oscillator is the subject of this paper,which explores its mechanisms and highlights its stability *** time-delayed technologies are currently garnering significant attention,the focus of this research remains crucially relevant.A non-perturbative approach is employed to refine and set the stage for the system under *** innovative methodologies introduced yield an equivalent linear differential equation,mirroring the inherent nonlinearities of the ***,the incorporation of quadratic nonlinearity into the frequency formula represents a cutting-edge *** analytical solution's validity is corroborated using a numerical *** conditions are ascertained through the residual Galerkin ***,it is observed that the delay parameter,in the context of the fractal system,reverses its stabilizing influence,impacting both the amplitude of delayed velocity and the *** analytical solution's precision is underscored by its close alignment with numerical ***,the study reveals that fractal characteristics emulate damping *** its applicability across diverse nonlinear dynamical systems,this non-perturbative approach emerges as a promising avenue for future research.

关键词： Van der Pol-Helmholtz-Duffing oscillator fractal space time-delay non-perturbative approach stability analysis El-Dib's frequency formula

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中日高中生汉语教材比较研究 ——以《高校生からの中国語》（从高中学起的汉语）与《跟我学汉语》（日语版）为例

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中日高中生汉语教材比较研究 ——以《高校生からの中国語》（从...

作者：本夛美季（honda MIKI）华东师范大学

学位级别：硕士

日本具有悠久的学习和使用汉语的历史,并且一直致力于推广汉语教育,这一点与其他国家相比尤其特殊。自中国汉朝开始,日本就着力推进汉语教育,而明治时期出版的教材《亚细亚言语集》,是日本第一部北京官方语言的教材,由日本学者广部精编... 详细信息

日本具有悠久的学习和使用汉语的历史,并且一直致力于推广汉语教育,这一点与其他国家相比尤其特殊。自中国汉朝开始,日本就着力推进汉语教育,而明治时期出版的教材《亚细亚言语集》,是日本第一部北京官方语言的教材,由日本学者广部精编写,它对日本汉语教育的发展起到了极其重要的作用。中国的改革开放在日本也快速掀起了一股“汉语热”。尽管日本本土出版了众多版本的汉语教材,但是缺乏具有权威性的汉语教材,而中国编辑出版的对日汉语教材在针对性方面又值得商榷。目前,针对对日汉语教材的比较研究寥寥无几,各种版本的日本汉语教材各自的特色与优缺点无法体现。因此有必要对这些教材进行比较研究,为编写具有针对性的对日汉语教材提供依据,以满足如此众多汉语学习者,特别是青少年汉语学习者的需求。本文基于实用性、针对性、趣味性、丰富性等教材编写理论,利用文献资料法、数据统计法与比较归纳法等方法,从语音、词汇、语法、汉字、练习、话题、文化、插图和课文等多个方面入手,对两套具有代表性的对日汉语教材《高校生からの中国語》(从高中学起的汉语)与《跟我学汉语》(日语版)进行全面的量化比较研究,揭示两套教材在选材、编写理念、文化内涵、侧重点等方面的异同,获得关于两套教材内容逐项量化统计与比较分析结果,佐证两套教材存在的优缺点,指出两部教材的互补性,并提出了相应的建议。希望本文的研究结果将有助于教材编写者,结合日本文化背景以及日本人的思维习惯,编写具有针对性的高质量的初级对日汉语教材。

关键词：《高校生からの中国語》(从高中学起的汉语) 《跟我学汉语》(日语版) 国际中文教育初级汉语教材教材对比

Making topological protein links using enzymatic reactions

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National Science Review 2024年第03期11卷 50-51页

作者： Roger Castells-Graells Todd o.Yeates Department of Chemistry and Biochemistry University of California UCLA-DoE Institute for Genomics and Proteomics

Proteins are exceedingly complex molecules though, at their heart, they are essentially linear polymers. Pull at their ends and one obtains an extended backbone. While that is true in most cases, some natural proteins... 详细信息

关键词： DESIGN

A synthetic microbial community used as a bioinoculant can overcome rice production constraints in acid soils

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Science China(Life Sciences) 2024年第5期67卷 1085-1086页

作者： Maureen o’Callaghan Shengjing Shi Resilient Agriculture Group AgResearchLincolnChristcurch 8140New Zealand

A customised synthetic microbial community(SynCom)composed of carefully selected rhizosphere-competent bacterial strains improved rice growth,yield and resistance to soil acidity and Al toxicity.

关键词： soil soils rhizosphere

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肺多层螺旋CT成像:探讨应用石榴石探测器的影像质量

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国际医学放射学杂志 2010年第4期 389-389页

作者： M.Yanagawa N.Tomiyama o.honda A.Kikuyama H.Sumikawa A.Inoue 赵芳 Department of Radiology Osaka University Graduate School of Medicine2-2 YamadaokaSuita-cityOsaka 565-0871Japan

目的对比应用石榴石探测器CT和常规探测器CT的评价标准及降低剂量CT的影像质量。材料与方法本研究经内部伦理审查委员会批准,获得知情同意书。应用Heitzman方法使11例尸体

关键词：影像质量常规低剂量探测器多层螺旋石榴石石榴子石宝石 CT

Valorization of Tree Bark-Derived Suberin in Applications for the Bio-Based Composites Industry–A Recent Review

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Journal of Renewable Materials 2024年第6期12卷 1029-1042页

作者： Aleksandra Jeżo Institute of Wood Sciences and Furniture SGGWNowoursynowska St.159Warsaw02-776Poland

Bark extracts are sustainable sources of biopolymers and hold great promise for replacing fossil fuel-based polymers,for example,in wood-based *** addition to primary and secondary metabolites,tree bark also contains suberin,which plays a major role in protecting the tree from environmental *** is a natural aliphatic-aromatic cross-linked polyester present in the cell walls of both normal and damaged external tissues,the main component of which are long-chain aliphatic *** main role as a plant ingredient is to protect against microbiological factors and water *** of the most important suberin monomers are suberin fatty acids,known for their hydrophobic and barrier ***,due to the diverse chemical composition of suberin,it is an attractive alternative to hydrocarbon-based *** its potential is recognized,it is not widely used in biocomposites technology,including wood-based composites and the polymer *** article will discuss the current knowledge about the potential of suberin and its components in biocomposites technology,which will include surface finishes,composite adhesives and polymer blends.

关键词： Suberin suberinic acids wood composites biocomposites biopolyester

Investigation of the effects of radial clearance on the screw conveyor performances for different inclinations

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Particuology 2024年第9期92卷 72-80页

作者： Berna Bolat Birgül Aşçıoğlu Temiztaş Enes Sezer Department of Mechanical Engineering Yıldız Technical University34349BeşiktaşİstanbulTurkey

Screw conveyors are widely used for bulk material *** study investigates the critical role of radial clearance,the gap between the screw and the conveyor body,on performance across various inclination *** Discrete Element Method(DEM)is employed to analyze the effects of different radial clearances on conveyor performance for concrete aggregate and sand as bulk *** efficiencies and capacity losses serve as key performance indicators,quantitatively assessed for each radial clearance and inclination *** validation is conducted to corroborate the *** the study,the optimal radial clearance was identified as 1.5 to 3 times of the particle *** optimal clearance minimizes the material jamming and increases the performance for screw conveyors with different inclinations and bulk material types as a result.

关键词： Screw conveyors Radial clearance Discrete element method(DEM) Volumetric efficiency Conveyor performance

Harnessing the power of pericytes and hypoxia-inducible factor-1 to modulate stroke outcome

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Neural Regeneration Research 2024年第3期19卷 473-474页

作者： omolara o.ogunshola Chih-Chieh Tsao Institute of Veterinary Physiology Vetsuisse FacultyUniversity of ZurichZurichSwitzerland

The human brain has exceedingly high metabolic *** cerebral vasculature has the critical task of providing sufficient blood supply to meet this *** sudden interruption of blood flow to the brain,as observed during ischemic stroke,results in acute neurological injury with devastating consequences-a high rate of adult disability and *** stroke is thus a vascular disorder with a dramatic neurological *** is an urgent need for more effective disease management to combat stroke as current treatment paradigms,focusing on vascular recanalization and neuroprotection,have only limited clinical *** accumulating data suggests successful long-term neuroprotection is unlikely to be achievable without a functional microvascular network,strategies that reduce endothelial dysfunction could be ***,very recent evidence highlighted herein suggests protecting the humble pericyte may be a new approach to reaching this goal.

关键词： consequences exceeding herein

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Mutations of voltage-gated sodium channel contribute to pyrethroid resistance in Panonychus citri

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Insect Science 2024年第3期31卷 803-816页

作者： Deng Pan Qiu-Juan Luo Andrias o.o'Reilly Guo-Rui Yuan Jin-Jun Wang Wei Dou Key Laboratory of Entomology and Pest Control Engineering College of Plant ProtectionAcademy of Agricultural SciencesSouthwest UniversityChongqingChina Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River(Ministry of Education) Academy of Agricultural SciencesSouthwest UniversityChongqingChina School of Biological and Environmental Sciences Liverpool John Moores UniversityLiverpoolUK

Insecticide resistance in Panonychus citri is a major obstacle to mite control in citrus *** insecticides are continually used to control mites in China,although resistance to pyrethroids has evolved in some ***,the resistance to the pyrethroid fenpropathrin was investigated and 7 out of 8 field-collected populations of P citri exhibited a high level of resistance,ranging from 171-fold to 15391-fold higher than the susceptible(SS)comparison *** voltage-gated sodium channel(VGSC)mutations were identified in the tested populations:L1031V,F1747L,and *** sequencing was used to evaluate the frequency of these mutations in the 19 field populations.L1031V and F1751I were present in all populations at frequencies of 11.6%-82.1%and 0.5%-31.8%,respectively,whereas the F1747L mutation was only present in 12 populations from Chongqing,Sichuan,Guangxi,and Yunnan *** of these mutations singly or in combination into transgenic flies significantly increased their resistance to fenpropathrin and these flies also exhibited reduced mortality after exposure to the pyrethroids permethrin andβ-*** citri VGSC homology modeling and ligand docking indicate that F1747 and F1751 form direct binding contacts with pyrethroids,which are lost with mutation,whereas L1031 mutation may diminish pyrethroid effects through an allosteric ***,the results provide molecular markers for monitoring pest resistance to pyrethroids and offer new insights into the basis of pyrethroid actions on sodium channels.

关键词： amplicon sequencing kdr mutation molecular docking Panonychus citri pyrethroid resistance transgenic flies

Evaluation of formation susceptibility and sand production potential in an offshore field,Niger Delta Basin,Nigeria

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Energy Geoscience

Energy Geoscience 2024年第1期5卷 1-11页

作者： David o.Ubuara Yinka A.olayinka Godwin o.Emujakporue Geoffrey C.Soronnadi-ononiwu Department of Geology University of Port HarcourtNigeria Mease Energy Nigeria Limited Port HarcourtNigeria Department of Geology University of IbadanNigeria Department of Physics University of Port HarcourtNigeria

Wellbore instability and sand production are all common challenges in the Niger Delta oil province,resulting in high drilling and production cost as well as damage to oil *** vulnerability of lithologic formations to wellbore instability and resultant sand production is investigated in the four delineated reservoirs of the“Areo”field,western part of Niger Delta *** foundation for establishing the geomechanical properties in this study was a 1-dimensional mechanical earth model,using gamma ray(GR),density(RHoB),compressional slowness(DTC),and shear slowness(DTS)*** the Areo oil field,two wells(well 001 and well 002)were *** evaluated formations are still primarily composed of compacted shale and unconsolidated sandstone,with reservoir sand units exhibiting lower elastic and rock strength properties than shale *** compressibility and porosity make sand more brittle,while low compressibility and porosity make shale stiffer due to high *** maximum force that can be applied to a shale unit without causing it to fail is 17.23 MPa,which is the maximum average rock strength of the *** means that shale requires more vertical stress or pressure than sand does in order to deform it(15.06 MPa).The three sand prediction approaches used in the analysis of sand production predictions have cut-off values that are higher than the average values of the *** Schlumberger sand production index method(S/I)indicates that the reservoir has potential for sand influx in the two wells,with the average of the four reservoirs studied in wells 001 and 002 being 1.551012 psi and 1.141012 psi ***,when a formation's sand production index is less than 1.241012 psi,as it is in this study,the formation is likely to produce *** findings support the notion that the defined sandstone units are highly unconsolidated and have a high potential for producing sands;therefore,sand control techniques must be factored in

关键词： Wireline log Stress Geo-mechanicanical characterization Sand prediction Niger delta