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Designing Electronic Structures of Multiscale Helical Converters for Tailored Ultrabroad Electromagnetic Absorption

Nano-Micro Letters 2025年第1期17卷 439-455页

作者： Zhaobo Feng Chongbo Liu Xin Li Guangsheng Luo Naixin Zhai Ruizhe Hu jing lin Jinbin Peng Yuhui Peng Renchao Che Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle School of Environmental and Chemical EngineeringNanchang Hangkong UniversityNanchang 330063People’s Republic of China School of Physics and Materials Nanchang UniversityNanchang 330031People’s Republic of China Key Laboratory of Nondestructive Testing Ministry of EducationNanchang Hangkong UniversityNanchang 330063People’s Republic of China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering and TechnologyFudan UniversityShanghai 200438People’s Republic of China

Atomic-scale doping strategies and structure design play pivotal roles in tailoring the electronic structure and physicochemical property of electromagnetic wave absorption(EMWA)***,the relationship between configuration and electromagnetic(EM)loss mechanism has remained ***,drawing inspiration from the DNA transcription process,we report the successful synthesis of novel in situ Mn/N co-doped helical carbon nanotubes with ultrabroad EMWA *** calculation and EM simulation confirm that the orbital coupling and spin polarization of the Mn–N4–C configuration,along with cross polarization generated by the helical structure,endow the helical converters with enhanced EM *** a result,HMC-8 demonstrates outstanding EMWA performance,achieving a minimum reflection loss of−63.13 dB at an ultralow thickness of 1.29 *** precise tuning of the graphite domain size,HMC-7 achieves an effective absorption bandwidth(EAB)of 6.08 GHz at 2.02 mm ***,constructing macroscale gradient metamaterials enables an ultrabroadband EAB of 12.16 GHz at a thickness of only 5.00 mm,with the maximum radar cross section reduction value reaching 36.4 dB *** innovative approach not only advances the understanding of metal–nonmetal co-doping but also realizes broadband EMWA,thus contributing to the development of EMWA mechanisms and applications.

关键词： Metal-nonmetal co-doping 3d-2p orbital coupling Spin polarization Helical structure Broadband EM wave absorption

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Conversion of CO2 to ethanol by using a metal-organic framework catalyst

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Science China Chemistry 2019年第10期62卷 1263-1264页

作者： jing-lin Zuo State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical EngineeringNanjing University

With the development of CO2 capture technology, CO2 can become an attractive C1 resource for synthesizing commodity chemicals. For example, direct conversion of CO2 to ethanol is of interest, but this process is also quite challenging, because it requires both the formation of one C–C bond and the retention of one C–O bond [1]. A combination of dual active sites, one for methanol formation and one for C–C coupling has been widely investigated for such a conversion, but an unbalanced rate in the two steps frequently leads to the formation of either methanol or long-chain hydrocarbons [2].

关键词： methanol ethanol catalyst

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Head injury mechanisms of the occupant under high-speed train rear-end collision

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Theoretical & Applied Mechanics Letters 2024年第5期14卷 321-334页

作者： Zhenhao Yu lin jing State Key Laboratory of Rail Transit Vehicle System Southwest Jiaotong UniversityChengdu 610031China

To improve the passive safety of high-speed trains,it is very important to understand the mechanism of head injury in high-speed train *** this study,the head injury mechanisms of occupants in high-speed train rear-end collisions were investigated based on the occupant-seat coupling model,which included a dummy representing the Chinese 50th percentile adult *** typical injury responses in terms of skull fractures,brain contusions,and diffuse axonal injury(DAI)were ***,the influences of collision speed and seat parameters on head injury response were *** simulation results indicate that the skull fractures primarily occur at the skull base region due to excessive neck extension,while the brain contusions and DAI result from the relative displacement of different brain *** increase in collision speed will promote the probability of skull fracture,brain contusion,and *** design modifications,such as reduced seat spacing,increased seat backrest angles,and selecting the appropriate cushion angle(76°)and friction coefficient(0.15),can effectively mitigate probably occupant's head injury.

关键词： High-speed train Rear-end collision Occupant head injury Seat design parameters

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Temperature and hydrogen-like impurity effects on the excited state of the strong coupling bound polaron in a CsI quantum pseudodot

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Chinese Physics B 2017年第2期26卷 399-402页

作者： jing-lin Xiao Institute of Condensed Matter Physics Inner Mongolia University for the Nationalities Tongliao 028043 China

With hydrogen-like impurity（HLI） located in the center of Cs I quantum pseudodot（QPD） and by using the variational method of Pekar type（VMPT）, we investigate the first-excited state energy（FESE）, excitation energy and transition frequency of the strongly-coupled bound polaron in the present paper. Temperature effects on bound polaron properties are calculated by employing the quantum statistical theory（QST）. According to the present work＇s numerical results, the FESE, excitation energy and transition frequency decay（amplify） with raising temperature in the regime of lower（higher）temperature. They are decreasing functions of Coulomb impurity potential strength.

关键词： temperature effect bound polaron CsI quantum pseudodot quantum statistical theory excited state

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Impact vibration behavior of railway vehicles:a state-of-the-art overview

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Acta Mechanica Sinica 2021年第8期37卷 1193-1221,I0003页

作者： lin jing Kaiyun Wang Wanming Zhai State Key Laboratory of Traction Power Southwest Jiaotong UniversityChengdu 610031China

Excessive vibrations of railway vehicles induced by dynamic impact loadings have a significant impact on train operating safety and stability;however,due to the complexity and diversity of railway lines and service environment,they are extremely difficult to eliminate.A comprehensive overview of recent studies on the impact vibration behavior of railway vehicles was given in this ***,the sources of impact excitations were categorized in terms of wheel-rail contact irregularity,aerodynamic loads,and longitudinal impulses by train traction/*** the main research approaches of vehicle impact vibration were briefly introduced in theoretical,experimental,and simulation ***,the impact vibration response characteristics of railway vehicles were categorized and examined in detail to various impact excitation ***,some attempts of using the railway vehicle vibration to detect track defects and the possible mitigation measures were outlined.

关键词： Impact excitation Vibration characteristics Railway vehicle Utilization and mitigation

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Priority probability deceleration deadline-aware TCP

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Journal of Systems Engineering and Electronics 2015年第3期26卷 595-602页

作者： Jin Ye jing lin Jiawei Huang School of Computer and Electronic Information Guangxi University Guangxi Experiment Center of Information School of Information and Communication Guilin University of Electronic Technology School of Information Science and Engineering Central South University

In modern data centers, because of the deadline- agnostic congestion control in transmission control protocol （TCP）, many deadline-sensitive flows can not finish before their deadlines. Therefore, providing a higher deadline meeting ratio becomes a critical challenge in the typical online data intensive （OLDI） ap- plications of data center networks （DCNs）. However, a problem named as priority synchronization is found in this paper, which de- creases the deadline meeting ratio badly. To solve this problem, we propose a priority probability deceleration （P2D） deadline-aware TCP. By using the novel probabilistic deceleration, p2D prevents the priority synchronization problem. Simulation results show that P2D increases the deadline meeting ratio by 20% compared with D2TCP.

关键词： data center networks (DCNs) deadline priority synchronization transport control protocol (TCP).

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Model reconstruction for worn blades based on hybrid surface registrations

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Advances in Manufacturing 2022年第3期10卷 479-494页

作者： Kang Cui Rui-Song Jiang lin jing School of Automation and Software Engineering Shanxi UniversityTaiyuan 030006People's Republic of China School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065People's Republic of China

Model reconstruction is crucial in blade repair because it directly determines the shape precision and finish of a repaired ***,owing to insufficient surface data pertaining to defective regions and the unique deformation caused by harsh environments,modeling a worn blade remains ***,a model reconstruction method for worn blades is developed in this *** conventional methods of constructing and interpolating sectional curves,the proposed method focuses on modifying a nominal computer aided design(CAD)model to reconstruct the worn *** weighted rigid registration and constraint-based non-rigid registration,the design surface extracted from the nominal CAD model can be deformed to align with the surface data of the worn blade without a significant loss of its initial *** results show that the deformed design surface exhibits sufficient smoothness and accuracy for guiding tool path generation in the subsequent blade repair.

关键词： Turbine blades Repair Model reconstruction Registration

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Persistent Currents in the Double Aharonov-Bohm Ring Connected to Electron Reservoirs

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Communications in Theoretical Physics 2007年第3期47卷 573-576页

作者： ZHANG Ying XIAO jing-lin Department of Mathematics and Physics Hebei Normal University of Science and Technology Qinhuangdao 066004 China College of Physics and Electromechanics Inner Mongolia National University Tongliao 028043 China

We study persistent currents in the double Aharonov-Bohm ring connected to two electron reservoirs by quantum waveguide theory. It is found that the persistent currents in the double Aharonov-Bohm ring depend .on the direction of the current flow from one reservoir to another. When the direction of the current flow reverses, tl2e persistent current in each ring of the double Aharonov-Bohm ring changes. If the two rings are of the same size, the persistent currents in the left and the right rings exchange at the reversal of the current flow direction.

关键词： quantum waveguide theory mesoscopic structure persistent currents

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Lattice Green's Function for Infinite Square Lattice in the Second Nearest-Neighbour Interaction Approximation

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Communications in Theoretical Physics 2001年第11期36卷 541-546页

作者： FAN Hong-Yi lin jing-Xian Department of Physics Shanghai Jiao Tong UniversityShanghai 200030China Department of Material Science and Engineering University of Science and Technology of ChinaHefei 230026China Department of Material Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China

In dealing with the square lattice model,we replace the traditionally needed Born-Von Karmann periodic boundary condition with additional Hamiltonian terms to make up a ring *** doing so,the lattice Green's function of an infinite square lattice in the second nearest-neighbour interaction approximation can be derived by means of the matrix Green's function *** is shown that the density of states may change when the second nearest-neighbour interaction is turned on.

关键词： matrix Green's function method,the second nearest-neighbour interaction

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Markov game for autonomic joint radio resource management in a multi-operator scenario

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The Journal of China Universities of Posts and Telecommunications 2007年第3期14卷 48-55页

作者： ZHANG Yong-jing lin Yue-wei School of Telecommunication Engineering Beijing University of Posts andTelecommunications Beijing 100876 China

This article addresses the autonomy of joint radio resource management （JRRM） between heterogeneous radio access technologies（RATs） owned by multiple operators. By modeling the inter-operator competition as a general-sum Markov game, correlated-Q learning（CE-Q） is introduced to generate the operators＇ pricing and admission policies at the correlated equilibrium autonomically. The heterogeneity in terms of coverage, service suitability, and cell capacity amongst different RATs are considered in the input state space, which is generalized using multi-layer feed-forward neural networks for less memory requirement. Simulation results indicate that the proposed algorithm can produce rational JRRM polices for each network under different load conditions through the autonomic learning process. Such policies guide the traffic toward an optimized distribution and improved resource utilization, which results in the highest network profits and lowest blocking probability compared to other self-learning algorithms.

关键词： autonomic JRRM multi-operator reinforcement learning (RL) Markov game

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