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Review of the Book “Magnetooptical spectroscopy of the Rare-Earth Compounds: Development and Application”

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Journal of Electromagnetic Analysis and Applications 2012年第5期4卷 216-217页

作者： I. s. Edelman L.v. Kirensky Institute of Physics Siberian Branch of Russian Academy of Sciences Krasnoyarsk Russia.

This book reviews and provides numerous theoretical calculations for the first time relevant to the optics and magneto-optics of the trivalent rare earth ions (RE3+) and their compounds. The RE3+ have unique spectroscopic properties that make them exceptionally attractive to both scientists, who probe the fundamental properties of these systems, and engineers, who develop these systems into photonic devices eagerly marketed in expanded technologies. Magneto-optical effects in compounds doped with RE3+ have been studied since the dawn of modern physics and have had a profound impact on their development in terms of practical opto-electronic devices. The authors of this new, exciting, and fresh text are world famous in this field, with over 150 years of experience in developing important theoretical and experimental contributions and over fifty years of more than 500 refereed publications in this field in the soviet Union and the United states. They offer both a conceptual description of magneto-optical phenomena, as well as clear, detailed theoretical development published for the first time of many of the phenomena only briefly addressed in the literature. The book is based on the author’s original work in theoretical and experimental investigations in magneto-optics. Numerous graphs and simple examples model the phenomena described in the text, making it a highly desirable treatise for scientists beginning their studies in the field of magneto-optics.

关键词： Book review Magnetooptical spectroscopy

Deformation kinking and highly localized nanocrystallization in metastableβ-Ti alloys using cold forging

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Journal of Materials science & Technology 2022年第25期120卷 53-64页

作者： Keer Li W.Chen G.X.Yu J.Y.Zhang s.W.Xin J.X.Liu X.X.Wang J.sun state Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China Northwest Institute for Nonferrous Metal Research Xi’an 710016China Baoji Titanium Industry Co. Ltd.Baoji 721014China

Deformation kinking as an uncommon plastic deformation mechanism has been reported in several materials while the relevant microstructure evolution and grain refinement behavior at a large strain remain unclear so *** this study,the issue was systematically investigated by utilizing cold forging to impose severe plastic deformation(sPD)on Ti-11 v metastableβ-Ti *** is found that the formation of kink bands experiences dislocation gliding,pre-kinking and the ripening of pre-kinks in *** kink bands are subsequently thickened through the coalescence of multiple kink bands in a manner of high *** dislocation slip is developed as a dominant deformation mechanism when deformation kinking is *** resulting grain refinement involves transverse breakdown and longitudinal splitting of dislocation walls and cells,which fragment kink bands into smallβ-*** refinement of theβ-blocks is still governed by dislocation activities,and finally nanograins with a diameter of~15 nm are produced at a large strain of ***,it is revealed that nanocrystallization is highly localized inside kink bands while the outer microstructure maintains original coarse *** localized refinement characterization is ascribed to the intrinsic soft nature of kink bands,shown as low hardness in nanoindentation *** intrinsic softening of kink bands is uncovered to originate from the inner degraded dislocation density evidenced by both experimental measurement and theoretical *** findings enrich fundamental understanding of deformation kinking,and shed some light on exploring the deformation accommodation mechanisms for metal materials at large strains.

关键词： Metastableβ-Ti alloys Deformation kinking Microstructural evolution Grain refinement Dislocations

superconductivity Observed in Tantalum Polyhydride at High Pressure

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中国物理快报:英文版 2023年第5期40卷 90-93页

作者：何鑫张昌玲李芷文张思佳闵保森张俊卢可赵建发史鲁川彭毅望贤成冯少敏宋静王鲁红 v.B.Prakapenka s.Chariton 刘浩哲靳常青 Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China school of Physical sciences University of Chinese Academy of SciencesBeijing 100190China songshan Lake Materials Laboratory Dongguan 523808China shanghai Advanced Research in Physical sciences Shanghai 201203China Department of Geology University of Illinois at Urbana ChampaignUrbanaIllinois 61801USA Center for Advanced Radiations sources University of ChicagoChicagoIllinois 60637USA Center for High Pressure science&Technology Advanced Research Beijing 100094China

We report experimental discovery of tantalum polyhydride *** was synthesized under highpressure and high-temperature conditions using diamond anvil cell combined with in situ high-pressure laser heating *** superconductivity was investigated via resistance measurements at *** highest superconducting transition temperature T_(c)was found to be~30 K at 197 GPa in the sample that was synthesized at the same pressure with~2000 K *** transitions are shifted to low temperature upon applying magnetic fields that support the superconductivity *** upper critical field at zero temperatureμ_0H_(c2)(0)of the superconducting phase is estimated to be~20 T that corresponds to Ginzburg-Landau coherent length~40 *** results suggest that the superconductivity may arise from 143d phase of TaH_(3).It is,for the first time to our best knowledge,experimental realization of superconducting hydrides for the vB group of transition metals.

关键词： hydride resistance superconductivity

Potential of octant degeneracy resolution in JUNO

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Chinese Physics C 2019年第3期43卷 17-21页

作者： M.v.smirnov Zhoujun Hu shuaijie Li Jiajie Ling Department of physics Sun Yat-Sen UniversityGuangzhou 510275China

This work extends the idea of using a cyclotron-based antineutrino source for purposes of neutrino *** baseline experiments suffer from degeneracies and correlations between Θ_(23), δ_(CP) and the mass ***, the combination of a superconducting cyclotron and a big liquid scintillator detector like JUNO in a medium baseline experiment, which does not depend on the mass hierarchy, may allow to determine whether the position of the mixing angle Θ_(23) is in the lower octant or the upper octant. such an experiment would improve the precision of the Θ_(23) measurement to a degree which depends on the CP-phase.

关键词： neutrino oscillations octant mixing angle JUNO

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非洲的假面剧(节译)

世界文学 2010年第6期 204-265页

作者：维·苏·奈保尔郑云张晖

在奈保尔的创作中(迄今有小说作品14部,非小说作品17部),小说和非小说作品各占半边天,游记又占了非小说作品的多半。奈保尔写游记有个特点,就是在游记中融入了小说的形式,创造了一种介于纪实和虚构之间的'中间文体'。奈保尔认为,小说作... 详细信息

在奈保尔的创作中(迄今有小说作品14部,非小说作品17部),小说和非小说作品各占半边天,游记又占了非小说作品的多半。奈保尔写游记有个特点,就是在游记中融入了小说的形式,创造了一种介于纪实和虚构之间的'中间文体'。奈保尔认为,小说作为一种形式,不足以反映被殖民统治打乱了的世界。为了表明他对世界发展的看法,必须打破小说和散文之间的界限,让各种文体因素服务于自己的文学目的。上世纪八十年代后,他的'文化考察性质'的游记作品已经超过了他的小说创作,成为他作品体系中非常

关键词：假面剧乌干达坦桑尼亚非洲人肯尼亚

Fractal Geometry:Axioms,Fractal Derivative and Its Geometrical Meaning

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Journal of Environmental & Earth sciences 2019年第1期1卷 1-5页

作者： v.K.Balkhanov Institute of Physical Materials science of the siberian Branch of the Russian Academy of sciences Ulan-Ude CityRussia

Physics success is largely determined by using *** often themselves create the necessary mathematical *** article shows how you can construct a fractal calculus-mathematics of fractal *** modem scientific literature often write from a firm that"there is no strict definition of fractals",to the more moderate that"objects in a certain sense,fractal and similar."We show that fractal geometry is a strict mathematical theory,defined by their *** methodology allows the geometry of axiomatised naturally define fractal integrals and *** application on your input below the axiom gives the opportunity to develop effective methods of measurement of fractal dimension,geometri-cal interpretation of fractal derivative gain and open dual symmetry.

关键词： Fractal geometry Fractal dimension Fractal calculus Duality

Assessing the performance of YOLOv5 algorithm for detecting volunteer cotton plants in corn fields at three different growth stages

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Artificial Intelligence in Agriculture 2022年第1期6卷 292-303页

作者： Pappu Kumar yadav J.Alex Thomasson stephen W.searcy Robert G.Hardin Ulisses Braga-Neto sorin C.Popescu Daniel E.Martin Roberto Rodriguez Karem Meza Juan Enciso Jorge solórzano Diaz Tianyi Wang Department of Biological&Agricultural Engineering Texas A&M UniversityCollege StationTXUnited States of America Department of Agricultural&Biological Engineering Mississippi State UniversityMississippi StateMSUnited States of America Department of Electrical&Computer Engineering Texas A&M UniversityCollege StationTXUnited States of America Department of Ecology&Conservation Biology Texas A&M UniversityCollege StationTXUnited States of America Aerial Application Technology Research U.S.D.A.Agriculture Research ServiceCollege StationTXUnited States of America U.s.D.A.-APHIs PPQ s&T Mission LabEdinburgTXUnited States of America Department of Civil&Environmental Engineering Utah State UniversityLoganUTUnited States of America Texas A&M AgriLife Research&Extension Center WeslacoTXUnited States of America College of Engineering China Agricultural UniversityBeijingChina

The feral or volunteer cotton(vC)plants when reach the pinhead squaring phase(5–6 leaf stage)can act as hosts for the boll weevil(Anthonomus grandis L.)*** Texas Boll Weevil Eradication Program(TBWEP)employs people to locate and eliminate vC plants growing by the side of roads or fields with rotation crops but the ones growing in the middle of fields remain *** this paper,we demonstrate the application of computer vision(Cv)algorithm based on You Only Look Once version 5(YOLOv5)for detecting vC plants growing in the middle of corn fields at three different growth stages(v3,v6 and vT)using unmanned aircraft systems(UAs)remote sensing *** the four variants of YOLOv5(s,m,l,and x)were used and their performances were compared based on classification accuracy,mean average precision(mAP)and *** was found that YOLOv5s could detect vC plants with maximum classification accuracy of 98%and mAP of 96.3%at v6 stage of corn while YOLOv5s and YOLOv5m resulted in the lowest classification accuracy of 85%and YOLOv5m and YOLOv5l had the least mAP of 86.5%at vT stage on images of size 416×416 *** developed Cv algorithm has the potential to effectively detect and locate vC plants growing in the middle of corn fields as well as expedite the management aspects of TBWEP.

关键词： Boll weevil volunteer cotton plant Computer vision YOLOv5 Unmanned aircraft systems(UAs) Remote sensing

Observation of Zitterbewegung in photonic microcavities

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Light(science & Applications) 2023年第6期12卷 1084-1090页

作者： seth Lovett Paul M.Walker Alexey Osipov Alexey Yulin Pooja Uday Naik Charles E.Whittaker Ivan A.shelykh Maurice s.skolnick Dmitry N.Krizhanovskii Department of Physics and Astronomy University of SheffieldS37RH SheffieldUK Department of Physics and Technology ITMO UniversitySt.Petersburg 197101Russia science Institute University of IcelandDunhagi 3IS-107 ReykjavikIceland

We present and experimentally study the effects of the photonic spin–orbit coupling on the real space propagation of polariton wavepackets in planar semiconductor microcavities and polaritonic analogues of *** particular,we demonstrate the appearance of an analogue Zitterbewegung effect,a term which translates as‘trembling motion’in English,which was originally proposed for relativistic Dirac electrons and consisted of the oscillations of the centre of mass of a wavepacket in the direction perpendicular to its *** a planar microcavity,we observe regular Zitterbewegung oscillations whose amplitude and period depend on the wavevector of the *** then extend these results to a honeycomb lattice of coupled microcavity *** to the planar cavity,such lattices are inherently more tuneable and versatile,allowing simulation of the Hamiltonians of a wide range of important physical *** observe an oscillation pattern related to the presence of the spin-split Dirac cones in the *** both cases,the experimentally observed oscillations are in good agreement with theoretical modelling and independently measured bandstructure parameters,providing strong evidence for the observation of Zitterbewegung.

关键词： planar versatile analogues

Universal Deformation Rings of Modules over self-injective Cluster-Tilted Algebras Are Trivial

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Algebra Colloquium 2021年第2期28卷 269-280页

作者： I.D.M.Gaviria JoséA.vélez-Marulanda Peng shan Universidad Nacional de Colombia Bogota D.C.Colombia Department of Mathematics Valdosta State UniversityValdostaGAUSA 不详

Let k be a fixed algebraically closed field of arbitrary characteristic,let Λ be a finite dimensional self-injective k-algebra,and let ∨ be an indecomposable non-projective left Λ-module with finite dimension over *** prove that if τΛ∨ is the Auslander-Reiten translation of ∨,then the versal deformation rings R(Λ,∨)and R(Λ,τΛ∨)(in the sense of *** and the second author)are *** use this to prove that if Λ is further a cluster-tilted k-algebra,then R(Λ,∨)is universal and isomorphic to k.

关键词： self-injective cluster tilted algebras Frobenius algebras (uni)versal deformation rings