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Congestion Control Method for Campus Opportunity Network Based on Ant Colony Algorithm

Chinese Journal of Electronics 2025年第2期34卷 576-585页

作者： Li Peng Cao Yumei Jia Huan Wang Xiaoming Wu Xiaojun School of Computer Science Shaanxi Normal University Xi’an 710119 China Key Laboratory of Intelligent Computing and Service Technology for Folk Song Ministry of Culture and Tourism Xi’an 710119 China Key Laboratory of Modern Teaching Technology Ministry of Education Xi’an 710062 China Engineering Laboratory of Teaching Information Technology of Shaanxi Province Xi’an 710119 China Xi’an Key Laboratory of Cultural Tourism Resources Development and Utilization Xi’an 710062 China

Due to the limited storage resources of portable devices, congestion control has become a hot direction in opportunity networks. To address the issue of heavy loads on certain nodes, which can impact routing efficiency and overall network performance, this paper proposes a load-balancing opportunity routing algorithm based on ant colony optimization (LBOR) in a campus environment. The congestion status is represented by the ratio of message drop receptions within a certain period and the occupancy of the cache. Path selection is based on the concentration of pheromones and the pheromones on the path are updated when a data transmission is completed. In the event of congestion, the algorithm prevents a large amount of data from entering the node and unloads the data to other nodes, even if they are not the optimal relay nodes. Experimental results demonstrate that the proposed algorithm effectively improves data transmission success rates, reduces network loads, and decreases the number of packet losses, especially under low latency conditions.

关键词： Opportunity network Routing protocol Congestion control Cache management

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Microbubble-based fabrication of resilient porous ionogels for high-sensitivity pressure sensors

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Microsystems & Nanoengineering 2024年第6期10卷 203-212页

作者： Ziwei Yang Jingxiao Wang Xiao Wan Hongcheng Xu Chuanyu Zhang Xiaoke Lu Weixuan Jing Chuanfei Guo Xueyong Wei State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710049China School of Instrument Science and Technology Xi’an Jiaotong UniversityXi’an 710049China Frontier Institute of Science and Technology Xi’an Jiaotong UniversityXi’an 710049China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhenGuangdong 518055China

High-sensitivity flexible pressure sensors have obtained extensive attention because of their expanding applications in e-skins and wearable medical devices for various disease *** the representative candidate for these sensors,the iontronic microstructure has been widely proven to enhance sensation behaviors such as the sensitivity and limits of ***,the fast and tunable fabrication of ionic-porous sensing elastomers remains challenging because of the current template-dissolved or 3D printing ***,we report a microbubble-based fabrication process that enables microporous and resilient-compliance ionogels for high-sensitivity pressure *** motion sliding results in a relative velocity between the imported airflow and the fluid solution,converts the airflow to microbubbles in the high-viscosity ionic fluid and promptly solidifies the fluid into a porous ionogel under ultraviolet *** ultrahigh porosity of up to 95%endows the porous ionogel with superelasticity and a Young’s modulus near 7 *** to the superelastic compliance and iontronic electrical double-layer effect,the porous ionogel packaged into two electrodes endows the pressure sensor with high sensitivity(684.4 kPa^(-1))over an ultrabroad range(~1 MPa)and a high-pressure resolution of 0.46%.Furthermore,the pressure sensor successfully captures high-yield broad-range signals from the fingertip low-pressure pulses(<1 kPa)to foot high-pressure activities(>500 kPa),even the grasping force of soft machine hands via an array-scanning circuit during object *** microbubble-based fabrication process for porous ionogels paves the way for designing wearable sensors or permeable electronics to monitor and diagnose various diseases.

关键词： porous bubble prompt

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Photothermal catalytic C-C coupling to ethylene from CO_(2) with high efficiency by synergistic cooperation of oxygen vacancy and half-metallic WTe_(2)

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Journal of Energy Chemistry 2024年第6期93卷 547-556,I0014页

作者： Xiaoyue Zhang Yong Yang Yingjie Hu Lijun Xiong Tianyu Wang Panjie Li Jinyou Shen Key Laboratory of Environmental Remediation and Ecological Health Ministry of Industry and Information TechnologySchool of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094JiangsuChina School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094JiangsuChina Nanjing Key Laboratory of Advanced Functional Materials Nanjing Xiaozhuang UniversityNanjing 210094JiangsuChina Jiangsu Environmental Engineering Technology Co.Ltd Nanjing 210019JiangsuChina

Photothermal catalytic CO_(2) conversion provides an effective solution targeting carbon neutrality by synergistic utilization of photon and ***,the C-C coupling initiated by photothermal catalysis is still a big ***,a three-dimensional(3D)hierarchical W_(18)O_(49)/WTe_(2) hollow nanosphere is constructed through in-situ embodying of oxygen vacancy and tellurium on the scaffold of WO_(3).The light absorption towards near-infrared spectral region and CO_(2) adsorption are enhanced by the formation of half-metal WTe_(2) and the unique hierarchical hollow *** with the generation of oxygen vacancy with strengthened CO_(2) capture,the photothermal effect on the samples can be sufficiently exploited for activating the CO_(2) *** particular,the close contact between W_(18)O_(49)and WTe_(2) largely promotes the photoinduced charge separation and mass transfer,and thus the~*CHO intermediate formation and fixedness are *** a result,the C-C coupling can be evoked between tungsten and tellurium atoms on WTe_(2).The ethylene production by optimized W_(18)O_(49)/WTe_(2) reaches 147.6μmol g^(-1)with the selectivity of 80%.The in-situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)and density functional theory(DFT)calculations are performed to unveil the presence and significance of aldehyde intermediate groups in C-C *** half-metallic WTe_(2) cocatalyst proposes a new approach for efficient CO_(2) conversion with solar energy,and may especially create a new platform for the generation of multi-carbon products.

关键词： Photothermal catalysis Half-metal WTe_(2) C–C coupling Carbon neutrality

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Relaxed Stability Criteria for Time-Delay systems:A Novel Quadratic Function Convex Approximation Approach

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 996-1006页

作者： Shenquan Wang Wenchengyu Ji Yulian Jiang Yanzheng Zhu Jian Sun College of Electrical and Electronic Engineering Changchun University of TechnologyChangchun 130012China the College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China Key Laboratory of Complex Systems Intelligent Control and Decision Beijing Institute of TechnologyBeijing 100081China

This paper develops a quadratic function convex approximation approach to deal with the negative definite problem of the quadratic function induced by stability analysis of linear systems with time-varying *** introducing two adjustable parameters and two free variables,a novel convex function greater than or equal to the quadratic function is constructed,regardless of the sign of the coefficient in the quadratic *** developed lemma can also be degenerated into the existing quadratic function negative-determination(QFND)lemma and relaxed QFND lemma respectively,by setting two adjustable parameters and two free variables as some particular ***,for a linear system with time-varying delays,a relaxed stability criterion is established via our developed lemma,together with the quivalent reciprocal combination technique and the Bessel-Legendre *** a result,the conservatism can be reduced via the proposed approach in the context of constructing Lyapunov-Krasovskii functionals for the stability analysis of linear time-varying delay ***,the superiority of our results is illustrated through three numerical examples.

关键词： Equivalent reciprocal combination technique quadratic function convex approximation approach stability timevarying delay

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Enhancing the Hydrogen Embrittlement Resistance of Medium Mn Steels by Designing Metastable Austenite with a Compositional Core-shell Structure

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Acta Metallurgica Sinica(English Letters) 2023年第7期36卷 1059-1077页

作者： Jun Zhang Binhan Sun Zhigang Yang Chi Zhang Hao Chen Key Laboratory for Advanced Materials of Ministry of Education School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Key Laboratory of Pressure Systems and Safety Ministryof EducationSchool of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237China

Deformation-induced martensite transformation from metastable retained austenite is one of the most efficient strain-hardening mechanisms contributing to the enhancement of strength-ductility synergy in advanced high-strength ***,the hard transformation product(often-martensite)and the H redistribution associated with phase transformation essentially decrease materials’resistance to hydrogen *** solve this fundamental conflict,we introduce a new microstructure architecting strategy based on an accurately design of core–shell compositional distribution inside the austenite *** employed this approach in a typical medium Mn steel(8 wt.%Mn)with an ultrafine grained austenite-ferrite *** produced a high Mn content(15–16 wt.%)in the austenite shell region and a low Mn content(~12 wt.%)in the core region,through a thermodynamics-guided two-step austenite reversion *** room-temperature deformation,the austenite core transforms continuously starting from a low strain,providing a high and persistent strain-hardening *** transformation of Mn-rich austenite shell,on the other hand,occurs only at the latest regime of the deformation,thus effectively inhibiting the nucleation of H-induced cracks at ferrite/deformation-induced martensite interfaces as well as suppressing their growth and *** step-wise transformation,tailored directly targeted to protect the hydrogen-sensitive microstructure defects(interfaces),results in a significantly enhanced hydrogen embrittlement resistance without sacrificing the mechanical performance in hydrogen-free *** design of compositional core–shell structure is expected to be applicable to,at least,other multiphase advanced high-strength steels containing metastable austenite.

关键词： Medium Mn steels Hydrogen embrittlement Core-shell austenite Chemical heterogeneity Deformationinduced martensite transformation

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Laser-fabricated wood-based microfluidic chip integrating dual detection for lead ion detection

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Applied Optics 2025年第15期64卷 4447-4452页

作者： Li, Chen Lyu, Yicheng Li, Hao Zhao, Tianwei Ding, Shukai College of Mechanical and Electrical Engineering Shaanxi University of Science and Technology Xi’an710021 China College of Mechanical Engineering Xi’an Jiaotong University Xi’an710049 China State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong University Xi’an710054 China School of Physics and Information Science Shaanxi University of Science and Technology Shaanxi Xi’an710021 China

This study utilized laser processing to prepare a wood-based microfluidic chip incorporating two detection methods (microwave detection and colorimetric spectroscopy detection) for detecting lead ions in solutions. By optimizing CO2 and femtosecond laser processing parameters and ultraviolet bonding processes, preparation of the chip was achieved. Femtosecond laser processing created 5.285 µm capacitive gaps in resistor-inductor-capacitor (RLC) resonant circuits. RLC circuits and a sodium rhodizonate colorimetric method were used to detect lead ions in solutions. Experimental results showed that the dual-mode system exhibited detection limits of 1 µg/L (colorimetry, linear response at 620 nm, R2 = 0.975) and 10 µg/L (microwave sensing via the peak frequency changes between 2.5 and 3.2 GHz, with a sensitivity of 0.36 dB/10 µg/L). This study accomplished the precision manufacturing of a wood-based microfluidic chip through laser processing and realized the integration of microwave and spectroscopic detection technologies. © 2025 Optica Publishing Group.

关键词： Gluing

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Two-dimensional Cu-porphyrin nanosheet membranes for nanofiltration

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Nano Research 2023年第5期16卷 6290-6297页

作者： Jiahao Cai Shizheng Song Lijie Zhu Qipeng Lu Zong Lu Yanying Wei Haihui Wang School of Chemistry&Chemical Engineering Guangdong Provincial Key Lab of Green Chemical Product TechnologyState Key Laboratory of Pulp and Paper EngineeringSouth China University of TechnologyGuangzhou 510640China School of Instrument Science and Opto-Electronics Engineering Beijing Information Science and Technology UniversityBeijing 100192China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory for Membrane Materials and Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

A kind of two-dimensional(2D)metal-organic framework(MOF)material,Cu-meso-tetrakis(4-carboxyphenyl)porphine(Cu-TCPP)nanosheets with wrinkled and flat morphologies are used as building blocks to assemble membranes by vacuum filtration(VF)and electrophoretic deposition(EPD)as energy-efficient nanofiltration(NF)membranes to remove dyes from *** the nanosheets with wrinkled structure can provide additional water transport channels,thereby increasing the water permeance,in the premise of a high rejection(>97.0%)for the dye brilliant blue G(BBG)(1.60 nm×1.90 nm),the water permeance of the membrane assembled by the wrinkled nanosheets(~1170 nm)is about 4 times that of the membrane assembled by the flat nanosheets(~530 nm),reaching 16.39 L·m^(−2)·h^(−1)·bar^(−1).Additionally,the use of the relatively flat nanosheets and the membrane preparation method of electrophoretic deposition is more conducive to stack nanosheets orderly and reduce ***,the water permeance of the membrane prepared by EPD(~1170 nm)with flat nanosheets is about twice that of the membrane prepared by VF(~530 nm),achieving 9.40 L·m^(−2)·h^(−1)·bar^(−1)with similar rejection(>97.0%)of dye evans blue(EB)(3.10 nm×1.20 nm).Furthermore,these membranes still exhibit good separation performance at high pressure of 0.6 *** with diverse structures and various membrane fabrication processes provide new directions for the separation performance optimization of 2D MOF materials for water purification.

关键词： two-dimensional material membrane metal-organic framework(MOF) nanofiltration nanosheet morphology electrophoretic deposition

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Solar manipulations of perpendicular magnetic anisotropy for flexible spintronics

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Frontiers of physics 2024年第4期19卷 73-79页

作者： Zhexi He Yifan Zhao Yujing Du Meng Zhao Yuxuan Jiang Ming Liu Ziyao Zhou State Key Laboratory for Manufacturing Systems Engineering Electronic Materials Research LaboratoryKey Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic Science and EngineeringThe International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologyXi’an Jiaotong UniversityXi’an 710049China School of Materials Science&Engineering Changzhou UniversityChangzhou 213164China

Flexible electronics/spintronics attracts researchers’attention for their application potential abroad in wearable devices,healthcare,and other *** devices’performance(speed,energy consumption)is highly dependent on manipulating information bits(spin-orientation in flexible spintronics).In this work,we established an organic photovoltaic(OPV)/ZnO/Pt/Co/Pt heterostructure on flexible PET substrates with perpendicular magnetic anisotropy(PMA).Under sunlight illumination,the photoelectrons generated from the OPV layer transfer into the PMA heterostructure,then they reduce the PMA strength by enhancing the interfacial Rashba field *** coercive field(Hc)reduces from 800 Oe to 500 Oe at its maximum,and the magnetization can be switched up and down *** stability of sunlight control of magnetization reversal under various bending conditions is also tested for flexible spintronic ***,the voltage output of sunlight-driven PMA is achieved in our prototype device,exhibiting an excellent angular dependence and opening a door towards solar-driven flexible spintronics with much lower energy consumption.

关键词： interfacial magnetoelectric coupling perpendicular magnetic anisotropy deterministic magnetization reversal photovoltaic control of magnetism

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Evaluation Model and Method of Intelligent Level and Ability Level of Command and Control System 9

Evaluation Model and Method of Intelligent Level and Ability...

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9th International Conference on Big Data and information Analytics, BigDIA 2023

作者： Wang, Shuangling Zhu, Xianqiang Sun, Yu Yi, Kan Nanjing Research Institute of Electronics Engineering Science and Technology on Information Systems Engineering Laboratory Nanjing China National University of Defense Technology Science and Technology on Information Systems Engineering Laboratory Changsha China

ISBN: (纸本)9798350330076

According to the characteristics of the command and control system, this paper analyzes the concept connotation of the intelligent command and control system, summarizes the types of intelligent level evaluation methods of the command and control system, puts forward the overall framework of intelligent level evaluation of the command and control system, gives the intelligent evaluation index system of the command and control system and the grade evaluation model of each intelligent attribute in the index system, and expounds the intelligent level evaluation method of the command and control information system based on double-base fuzzy reasoning for the intelligent level evaluation in the framework, which provides a set of method guidance for measuring the intelligent level and ability level of the command and control system. © 2023 IEEE.

关键词： Command and control systems

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Rotation Correction Based Neural Radiance Fields for Multi-view Satellite Images 11

Rotation Correction Based Neural Radiance Fields for Multi-v...

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Optoelectronic Imaging and Multimedia technology XI 2024

作者： Liu, Yangfan Guo, Yanan Bian, Huanyu Zhang, Benkui Du, Kangning Xie, Ying Cao, Lin Key Laboratory of Information and Communication Systems Ministry of Information Industry Beijing Information Science and Technology University Beijing China Key Laboratory of Target Cognition and Application Technology Aerospace Information Research Institute Beijing China

ISBN: (纸本)9781510682061

To address the issue of reconstruction distortions caused by using non-unified RPC models in 3D reconstruction with multi-view satellite imagery. In this paper, we propose a method termed Rotation Correction Based Neural Radiance Fields for Multi-view Satellite Images. Our method optimizes the satellite camera model and neural radiance field by integrating multi-axial rotational correction into the reconstruction task. By separately correcting the attitude angles along the X, Y, and Z axes, the geometric distortions in multi-view satellite images can be corrected. Furthermore, by setting the ray projection in the neural radiance field under the effect of variable correction rotation variables, our method allows simultaneous optimization of the correction rotation variables and the neural radiance field during back propagation. We conducted experiments using WorldView-3 images from different locations, comparing the reconstruction results of images corrected with traditional BA and our method. Our method achieved the best results. © 2024 SPIE.

关键词： Satellite imagery

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