检索结果-南通市图书馆

Physics of porous materials under extreme laser-generated conditions

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第3期9卷 1-3页

作者： v.t.tikhonchuk S.Weber Extreme Light Infrastructure ERIC ELI Beamlines Facility25241 DolníBrezanyCzech Republic CELIA University of Bordeaux33405 TalenceFrance

Porous materials offer unique possibilities for the production of plasmas with controlled density profiles for experiments on laser–matter *** are of growing relevance to many applications,such as inertial confinement fusion,fundamental research,and secondary *** the processes of transformation of a porous solid into a plasma is of fundamental interest and is needed for producing materials with desired properties.

关键词： interaction. properties. porous

Preliminary results of lithological and palynological study of Svobodny, ancient man's parking relic in Amur region, Russia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Global Geology 2024年

作者： Kovalenko S.v. ke.ina t.v. Kryuchko E.I. Mironov M.A. Amur State University Center for the Preservation of Historical and Cultural Heritage of the Amur Region

Asingle-layermonument.v.bodny,ancientman’sparkinglot-1,discoveredin2021aspart of archaeological work to study the zone of economic development of the Amur region was investigated lithologically and palynologically. Based on the results of geomorphological analysis of the territory, the study of artifacts, palynological data, as well as analogy with previously identified and sufficiently studied relics in the region, the existence of the Osinoozersk late Neolithic culture in this territory is assumed. the time of its expansion in the Amur region is determined within the framework of the second half of the Iv millennium BC to the first half of the II millennium BC. the preliminary results of palynological analysis suggest the existence of a temperate climate here, was close to the modern one, which does not contradict the reconstructed paleoclimate and environments of the region during the Holocene period.

关键词：

Preliminary results of lithological and palynological study of Svobodny,ancient man’s parking relic in Amur region,Russia

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Global Geology 2024年第3期27卷 121-131页

作者： Kovalenko S.v. ke.ina t.v. Kryuchko E.I. Mironov M.A. Center for the Preservation of Historical and Cultural Heritage of the Amur Region Blagoveshchensk 675000Russia Amur State University Blagoveshchensk 675027Russia

A single-layer monument Svobodny,ancient man's parking lot-1,discovered in 2021 as part of archaeological work to study the zone of economic development of the Amur region was investigated lithologically and *** on the results of geomorphological analysis of the territory,the study of artifacts,palynological data,as well as analogy with previously identified and sufficiently studied relics in the region,the existence of the Osinoozersk late Neolithic culture in this territory is *** time of its expansion in the Amur region is determined within the framework of the second half of the Iv millennium BC to the first half of the II millennium *** preliminary results of palynological analysis suggest the existence of a temperate climate here,was close to the modern one,which does not contradict the reconstructed paleoclimate and environments of the region during the Holocene period.

关键词： Osinoozersk culture palynological spectra Zeya River paleoclimate

Nonlinear-Optical Analogies in Nuclear-Like Soliton Reactions:Selection Rules,Nonlinear tunneling and Sub-Barrier Fusion–Fission

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2024年第8期41卷 1-7页

作者： t.L.Belyaeva v.N.Serkin Universidad Autonoma del Estado de Mexico Av.Instituto Literario 100C.P.50000TolucaMexico Benemerita Universidad Autonoma de Puebla Av.4 Sur 104C.P.72001PueblaMexico

the main goal of our study is to reveal unexpected but intriguing analogies arising between optical solitons and nuclear physics,which still remain hidden from *** consider the main cornerstones of the concept of nonlinear optics of nuclear reactions and the well-dressed repulsive-core *** the base of this model,we reveal the most intriguing properties of the nonlinear tunneling of nucleus-like solitons and the soliton selfinduced sub-barrier transparency *** describe novel interesting and stimulating analogies between the interaction of nucleus-like solitons on the repulsive barrier and nuclear sub-barrier *** main finding of this study concerns the conservation of total number of nucleons(or the baryon number)in nuclear-like soliton *** show that inelastic interactions among well-dressed repulsive-core solitons arise only when a“cloud”of“dressing”spectral side-bands appears in the frequency spectra of the *** property of nucleus-like solitons is directly related to the nuclear density distribution described by the dimensionless small shape-squareness *** the Fourier spectra of nucleus-like solitons are similar to the nuclear form *** show that the nuclear-like reactions between well-dressed solitons are realized by“exchange”between“particle-like”side bands in their spectra.

关键词： solitons soliton Nonlinear

Bayesian Filtering for High-Dimensional State-Space Models With State Partition and Error Compensation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1239-1249页

作者： ke Li Shunyi Zhao Biao Huang Fei Liu key Laboratory of Advanced Process Control for Light Industry(Ministry of Education) Institute of AutomationJiangnan UniversityWuxi 214122China Department of Chemical and Materials Engineering University of AlbertaEdmonton AB T6G 2G6Canada

In the era of exponential growth of data availability,the architecture of systems has a trend toward high dimensionality,and directly exploiting holistic information for state inference is not always computationally *** paper proposes a novel Bayesian filtering algorithm that considers algorithmic computational cost and estimation accuracy for high-dimensional linear *** high-dimensional state vector is divided into several blocks to save computation resources by avoiding the calculation of error covariance with immense *** that,two sequential states are estimated simultaneously by introducing an auxiliary variable in the new probability space,mitigating the performance degradation caused by state ***,the computational cost and error covariance of the proposed algorithm are analyzed analytically to show its distinct features compared with several existing *** results illustrate that the proposed Bayesian filtering can maintain a higher estimation accuracy with reasonable computational cost when applied to high-dimensional linear systems.

关键词： filtering estimation error

Axial enantiomers with donor-regulated tADF feature for multicolor circularly polarized electroluminescence

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第6期67卷 2039-2045页

作者： Chen-Hao Guo Wen-Long Zhao ke-ke tan Wei-Chen Guo Liheng Feng Chuan-Feng Chen Meng Li School of Chemistry and Chemical Engineering Shanxi UniversityTaiyuan030006China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China

this study optimized the tADF feature of axial chiral enantiomers through precise donor engineering,and multicolor CP-tADFwas achieved in the axial chiral *** pairs of axial enantiomers with donor-regulated tADF feature,namely(R/S)-tPCBD,(R/S)-DPCBD,and(R/S)-DPACBD,were synthesized by introducing carbazole donors with different substituents onto biphenyl cyanide *** the electron-donating ability of donors increases,the emission of these axial enantiomers ranges from 455,476 to 552 nm,their singlet-triplet energy gaps(ΔE_(St))gradually decrease from 0.30,0.22 to 0.02 e v,accompanied by an increasement in the transition rate(k_(RISC))of RISC process,and the k_(RISC)of DPACBD could reach up to 7.16×10^(5)s^(-1).these axial enantiomers also exhibit mirror-image CD and circularly polarized luminescence(CPL)***,OLEDs based on tPCBD,DPCBD,and DPACBD as emitter were then fabricated,which displayed blue,green,and orange electroluminescence with EQE_(max)of 13.0%,16.4%,and 25.0%,*** results also exhibited a phenomenon of device efficiency increasing with the enhancement of donor ***,the CP-OLEDs using(R/S)-tPCBD,(R/S)-DPCBD and(R/S)-DPACBD as emitters displayed intense CPEL signals with g_(EL)values of 3.4×10^(-3)/-4.1×10^(-3),3.2×10^(-3)/-3.1×10^(-3)and2.3×10^(-3)/-2.1×10^(-3),*** convenient molecular engineering of donor regulation in the same molecular skeleton,CP-tADF materials with multicolor CPEL and improved device performance could be conveniently achieved.

关键词： axial chirality thermally act.v.ted delayed fluorescence circularly polarized luminescence electroluminescence organic light-emitting diodes

tensor force impact on shell evolution in neutron-rich Si and Ni isotopes

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第4期48卷 95-106页

作者： S.v.Sidorov A.S.Kornilova t.Yu.tretyakova Faculty of Physics Lomonosov Moscow State UniversityMoscow 119991Russia Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State UniversityMoscow 119991Russia

the influence of the tensor interaction of nucleons on the characteristics of neutron-rich silicon and nickel isotopes was studied in this *** forces are considered within the framework of the Hartree-Fock approach with the Skyrme *** addition of a tensor component of interaction is shown to improve the description of the splittings between different single-particle states and decrease nucleon-nucleon pairing correlations in silicon and nickel *** attention was directed toward the role of isovector tensor forces relevant to the interaction of like nucleons.

关键词： nuclear shell model tensor interaction silicon isotopes nickel isotopes

Facile intercalation of alkali ions in WO_(3)for modulated electronic and optical properties:Implications for artificial synapses and chromogenic application

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2024年第2期67卷 149-160页

作者： Changmeng Huan Zihan Lu Silin tang Yongqing Cai Qingqing ke School of Microelectronics Science and technology Sun Yat-sen UniversityZhuhai 519082China Guangdong Provincial key Laboratory of Optoelectronic Information Processing Chips and Systems Sun Yat-sen UniversityZhuhai 519082China Institute of Applied Physics and Materials Engineering University of MacaoTaipaMacao 999078China

tungsten oxides(WO_(3))are widely recognized as multifunctional systems owing to the existence of rich *** diverse phases exhibit distinct octahedra-tilting patterns,generating substantial tunnels that are ideally suited for ***,a quantitat.v. comprehension regarding the impact of distinct phases on the kinetics of intercalated conducting ions remains ***,we employ first-principles calculations to explore the spatial and orientational correlations of ion transport inγ-and h-WO_(3),shedding light on the relationship between diffusion barriers and the size of the conducting *** findings reveal that different types and concentrations of alkali-metals induce distinct and continuous lattice distortions in WO_(3)***,γ-WO_(3)is more appropriate to accommodate Li+ions,exhibiting a diffusion barrier and coefficient of 0.25 ev and 9.31×10^(-8)cm^(2)s^(-1),***,h-WO_(3)features unidirectional and sizeable tunnels that facilitate the transport of K+ions with an even lower barrier and a high coefficient of 0.11 e v and 2.12×10^(-5)cm^(2)s^(-1),***,the introduction of alkali-metal into WO_(3)tunnels tends to introduce n-type conduct.v.ty by contributing s-electrons to the unoccupied W 5d states,resulting in enhanced conduct.v.ty and tunable electronic *** alkali metals in WO_(3)tunnels are prone to charge transfer,forming small polaronic states and modulating the light absorption in the visible and nearinfrared *** tunable electronic and optical properties,combined with the high diffusion coefficient,underscore the potential of WO_(3)in applications such as artificial synapses and chromogenic devices.

关键词： WO_(3)polymorphs ion insertion kinetic act.v.ty tunable electronic and optical properties iontronics

Highly cycle-stable vOPO_(4)-based cathodes for magnesium ion batteries:Insight into the role of interlayer engineering in batteries performance

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第7期17卷 6127-6138页

作者： Jiahe Zhang Jing Shang Xiaojun Zhang ke Wang Yihe Zhang Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastesNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China

It is the sluggish ion migration kinetics that seriously affects the practical performance of the magnesium ion *** though an electrode material design using rational interlayer engineering method could effect.v.ly solve this issue,the optimal interlayer distance remains ***,various vOPO_(4)-based electrodes with expanded interlayer spacing were fabricated and the relationship between interlayer structure and battery performance was *** analysis combined with computations unveils the existence of an optimal interlayer structure,as inadequate expansion failed to fully utilization of the material performance,while excessive expansion degraded the electrode *** them,the electrode with triethylene glycol(tEG)intercalation exhibited optimized performance,maintaining excellent cycling stability(191.3 mAh·g^(−1)after 800 cycles).Density functional theory(DFt)demonstrated the effect.v.ness and limitations to lowering the migration energy barrier by expanding the interlayer *** addition,systematic mechanism research revealed the Mg^(2+)storage process:the stepwise shuttling of Mg^(2+)along the directions that lie in(001)plane triggers two pairs of redox processes,namely v^(5+)/v^(4+)and v^(4+)/v^(3+).this study,regulation of layer spacing to achieve the best integrated performance of electrodes,could deepen the understanding of interlayer engineering and guide the design of advanced mult.v.lent-ion batteries.

关键词： magnesium ion batteries layered electrodes interlayer engineering energy storage mechanisms high kinetics