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Structural characteristics of electrohydrodynamic jets induced by a blade-plane actuator subjected to highly non-uniform electric fields:Parametric investigation through the particle image velocimetry techniques

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High Voltage 2023年第1期8卷 183-195页

作者： Zelu Yan Christophe Louste Philippe Traoré Jian Wu Jian'an Fang Logistics Engineering College Shanghai Maritime UniversityShanghaiChina Institut PPRIME Universitéde PoitiersPoitiersFrance Key Laboratory of Aerospace Thermophysics School of Energy Science and EngineeringHarbin Institute of TechnologyHarbinChina College of Information Science and Technology Donghua UniversityShanghaiChina

This study set out to systematically investigate the structural characteristics of plane electrohydrodynamic jets through the particle image velocimetry(PIV)*** to the wide range of applied voltages and electrode gaps under various experimental conditions,an assessment of the image quality and a statistical analysis of the velocity fields are first performed to ensure the validity of the PIV measurements,which were originally applied purely to fluid *** results indicate that the time interval between two consecutive images should be pre-adjusted to reduce the number of uncorrelated vector ***,the minimum number of instantaneous fields should be achieved for an accurate calculation of the time-averaged *** equivalent electric field criterion adapted to the asymmetric electrode configuration is defined to find similarities in flow structures under different voltage and electrode gap *** the applied electric field increases,three injection regimes are identified and the current increases almost linearly,indicating a large conduction current *** decrease in charge density due to recombination proves to be relevant in all cases of this *** to the parametric analysis approach for classical jets and thermal plumes,the evolution of the coefficients of axial velocity,half-width and turbulence intensity are investigated.

关键词： plane particle blade

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Proposal for valleytronic materials:Ferrovalley metal and valley gapless semiconductor

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Frontiers of physics 2024年第2期19卷 131-139页

作者： San-Dong Guo Yu-Ling Tao Guangzhao Wang Shaobo Chen Dong Huang Yee Sin Ang School of Electronic Engineering Xi’an University of Posts and TelecommunicationsXi’an 710121China Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing School of Electronic Information EngineeringYangtze Normal UniversityChongqing 408100China College of Electronic and Information Engineering Anshun UniversityAnshun 561000China Science Mathematics and Technology(SMT)Singapore University of Technology and Design(SUTD)8 Somapah RoadSingapore 487372Singapore

Valleytronic materials can provide new degrees of freedom to future electronic *** this work,the concepts of the ferrovalley metal(FVM)and valley gapless semiconductor(VGS)are proposed,which can be achieved in valleytronic bilayer systems by electric field *** valleytronic bilayer systems,the interaction between out-of-plane ferroelectricity and A-type antiferromagnetism can induce layer-polarized anomalous valley Hall(LP-AVH)*** K and−K valleys of FVM are both metallic,and electron and hole carriers simultaneously *** the extreme case,the FVM can become VGS by analogizing spin gapless semiconductor(SGS).Moreover,it is proposed that the valley splitting enhancement and valley polarization reversal can be achieved by electric field engineering in valleytronic bilayer *** the bilayer RuBr_(2)as an example,our proposal is confirmed by the first-principle *** FVM and VGS can be achieved in bilayer RuBr_(2)by applying electric *** appropriate electric field range,increasing electric field can enhance valley splitting,and the valley polarization can be reversed by flipping electric field *** effectively tune valley properties by electric field in bilayer systems,the parent monolayer should possess out-of-plane magnetization,and have large valley *** results shed light on the possible role of electric field in tuning valleytronic bilayer systems,and provide a way to design the ferrovalley-related material by electric field.

关键词： valleytronics electric field bilayer

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New Results on Almost Periodic Dynamics of a Delayed Nicholson’s Blowflies Model with Feedback Control

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IAENG International Journal of Applied Mathematics 2025年第4期55卷 842-848页

作者： Sun, Nan Duan, Lian Xie, Dong Department of Mathematics Anhui University of Science and Technology Huainan232001 China Anhui Province Engineering Laboratory for Big Data Analysis Early Warning Technology of Coal Mine Safety Department of Mathematics Anhui University of Science and Technology Huainan232001 China Department of Electronic and Information Engineering Bozhou University Bozhou236800 China

This paper considers a delayed almost periodic Nicholson’s blowflies model with feedback control. Through employing the almost periodic differential equations theory and Lyapunov functional approach, some principles are set up for ensuring the persistence, existence and global asymptotic stability of positive almost periodic solutions of the considered model. Furthermore, a numerical example is provided for validating the theoretical analysis. The achieved results are novel and serve as an addition to the existing ones. © (2025), (International Association of Engineers). All rights reserved.

关键词： Lyapunov functions

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In situ resource utilization of lunar soil for highly efficient extraterrestrial fuel and oxygen supply

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National science Review 2023年第2期10卷 224-231页

作者： Yuan Zhong Jingxiang Low Qing Zhu Yawen Jiang Xiwen Yu Xinyu Wang Fei Zhang Weiwei Shang Ran Long Yingfang Yao Wei Yao Jun Jiang Yi Luo Weihua Wang Jinlong Yang Zhigang Zou Yujie Xiong Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science National Synchrotron Radiation Laboratory School of Information Science and TechnologyUniversity of Science and Technology of China Eco-Materials and Renewable Energy Research Center (ERERC) Jiangsu Key Laboratory for Nano Technology National Laboratory of Solid State MicrostructuresSchool of PhysicsCollaborative Innovation Center of Advanced MicrostructuresCollege of Engineering and Applied SciencesNanjing University Qian Xuesen Laboratory of Space Technology China Academy of Space Technology

Building up a lunar settlement is the ultimate aim of lunar ***, limited fuel and oxygen supplies restrict human survival on the ***,we demonstrate the in situ resource utilization of lunar soil for extraterrestrial fuel and oxygen production,which may power up our solely natural satellite and supply respiratory ***,the lunar soil is loaded with Cu species and employed for electro catalytic CO2conversion,demonstrating significant production of *** addition,the selected component in lunar soil（***3） loaded with Cu can reach a CH4F aradaic efficiency of 72.05% with a CH4production rate of 0.8 mL/min at 600 mA/***,an O2production rate of 2.3 mL/min can be ***,we demonstrate that our developed process starting from catalyst preparation to electrocatalytic CO2conversion is so accessible that it can be operated in an unmmaned manner via a robotic *** a highly efficient extraterrestrial fuel and oxygen production system is expected to push forward the development of mankind's civilization toward an extraterrestrial settlement.

关键词： Chang’E-5 lunar soil fuel production CO2 conversion extraterrestrial settlement in situ resource utilization

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High-density MDM-WDM silicon photonic transmitter chiplet based on MRMs and dual-mode GC for 4×56 Gbps 3D co-packaged optical interconnects

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Chinese Optics Letters 2024年第12期22卷 1-6页

作者： Xinyi Wang Jiangbing Du Weihong Shen Ke Xu Zuyuan He State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong UniversityShanghai 200240China Institute of Photonic Chips University of Shanghai for Science and TechnologyShanghai 200093China Department of Electronic and Information Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China

In this Letter,a four-channel silicon photonic mode-division-multiplexing(MDM)and wavelength-division multiplexing(WDM)transmitter chiplet is proposed over a 1.65 mm~2 footprint,utilizing add-drop micro-ring modulators to simultaneously achieve electro-optic modulation and two-wavelength multiplexing.A dual-mode grating coupler with a side-distributed Bragg reflector for equalized two-mode coupling is realized with high chip-to-fiber coupling efficiency,so as to support the MDM optical fiber interface.A high data rate of up to 4×56 Gbps signaling is experimentally demonstrated,featuring applications like 200G quad small form-factor pluggable(QSFP)transceivers and indicating significant potential for highdensity and large-capacity 3D co-packaged optical interconnects through flip-chip-based electronic-photonic packaging.

关键词： high density silicon photonic MDM-WDM transmitter add-drop micro-ring modulator dual-mode grating coupler

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Dynamic Self-Triggered Control for Nonzero-Sum Games of Unknown Nonlinear Constrained systems via Generalized Fuzzy Hyperbolic Models

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IEEE Transactions on systems, Man, and Cybernetics: systems 2025年第5期55卷 3506-3518页

作者： Liu, Fan Su, Hanguang Zhang, Huaguang Luo, Biao Wang, Jiawei Northeastern University School of Information Science and Engineering Shenyang110004 China Northeastern University School of Information Science and Engineering State Key Laboratory of Synthetical Automation for Process Industries Shenyang110004 China Central South University School of Automation Changsha410083 China Northeastern University National Frontiers Science Center for Industrial Intelligence and Systems Optimization Shenyang110819 China

In this article, a novel adaptive dynamic programming algorithm is devised to handle the multiplayer nonzero-sum (NZS) games of completely unknown nonlinear systems, subject to state and input constraints under the dynamic self-triggered mechanism. Initially, in order to eliminate the demand for system dynamics, a generalized fuzzy hyperbolic model based identifier is established, which only relies on input-output data. Then, the equivalent transformation of the reconstructed system is implemented by virtue of barrier functions. With the aid of the nonquadratic utility function, the Hamilton-Jacobi equation of the NZS game is derived. After that, an adaptive critic scheme with experience replay is employed to acquire the Nash equilibrium solution. Furthermore, a novel dynamic self-triggered rule is proposed with the dead-zone operation, which not only significantly reduces source consumption but also overcomes the implementation difficulty of monitoring hardware in the event-triggered mechanism. Moreover, the stability of the system and the uniform ultimate boundedness of the critic weights are guaranteed. Ultimately, two simulation examples are given to validate the feasibility of the developed method. © 2025 IEEE.

关键词： Adaptive algorithms

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Efficient Parameter Determination for BPDN in Underwater Acoustic MIMO-OSDM Communications Using Stein's Unbiased Risk Estimate

Efficient Parameter Determination for BPDN in Underwater Aco...

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2025 IEEE Underwater technology, UT 2025

作者： Ishijima, Ryoichi Ebihara, Tadashi Wakatsuki, Naoto Maeda, Yuka Mizutani, Koichi Graduate School of Science and Technology University of Tsukuba Tsukuba Japan Institute of Systems and Information Engineering University of Tsukuba Tsukuba Japan

ISBN: (纸本)9798331534189

Underwater acoustic (UWA) communication schemes including multiple-input-multiple-output orthogonal signal division multiplexing (MIMO-OSDM) are crucial for the wireless operation of autonomous unmanned vehicles and remotely operated vehicles. This paper presents an efficient regularization parameter determination for MIMO-OSDM to design a reliable communication system. Recent studies have revealed that utilizing sparsity, a physical nature of the UWA channel can improve communication quality. While the combination of MIMO-OSDM and basis pursuit denoising (BPDN) enables the UWA communication that accounts for channel sparsity, this approach requires the prior simulation to obtain a database to fine-tune linear coefficients which decide the regularization parameter of BPDN. To reduce computational cost without sacrificing communication quality, we propose the statistical solution: an application of Stein's unbiased risk estimate (SURE) for MIMO-OSDM using BPDN aiming for parameter determination through a minimization of the channel estimation error. Our simulation results demonstrated that the proposed parameter determinator serves as an estimator of channel estimation error. Our experimental results demonstrated that the proposed channel estimator using SURE achieved almost the same communication quality and demodulation performance as the existing method without prior database creation. © 2025 IEEE.

关键词： Risk perception

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Sparsity-based efficient simulation of cluster targets electromagnetic scattering

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Journal of systems engineering and Electronics 2023年第2期34卷 299-306页

作者： TIAN Yuguang LIU Yixin CHEN Xuan CHEN Penghui WANG Jun CHEN Junwen Communication University of China Beijing 100024China School of Electronic and Information Engineering Beihang UniversityBeijing 100191China Science and Technology on Electromagnetic Scattering Laboratory Beijing 100854China

An efficient and real-time simulation method is proposed for the dynamic electromagnetic characteristics of cluster targets to meet the requirements of engineering practical ***,the coordinate transformation method is used to establish a geometric model of the observation scene,which is described by the azimuth angles and elevation angles of the radar in the target reference frame and the attitude angles of the target in the radar reference ***,an approach for dynamic electromagnetic scattering simulation is ***,a fast-computing method based on sparsity in the time domain,space domain,and frequency domain is *** method analyzes the sparsity-based dynamic scattering characteristic of the typical cluster *** error between the sparsity-based method and the benchmark is small,proving the effectiveness of the proposed method.

关键词： geometric model of the observation scene dynamic electromagnetic scattering simulation sparsity-based method

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Optimisation of sparse deep autoencoders for dynamic network embedding

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CAAI Transactions on Intelligence technology 2024年第6期9卷 1361-1376页

作者： Huimei Tang Yutao Zhang Lijia Ma Qiuzhen Lin Liping Huang Jianqiang Li Maoguo Gong College of Computer Science and Software Engineering Shenzhen UniversityShenzhenChina Institute for Infocomm Research Agency for Science Technology and ResearchSingaporeSingapore Key Laboratory of Collaborative Intelligence Systems Ministry of EducationXidian UniversityXi'anChina

Network embedding(NE)tries to learn the potential properties of complex networks represented in a low-dimensional feature ***,the existing deep learningbased NE methods are time-consuming as they need to train a dense architecture for deep neural networks with extensive unknown weight parameters.A sparse deep autoencoder(called SPDNE)for dynamic NE is proposed,aiming to learn the network structures while preserving the node evolution with a low computational *** tries to use an optimal sparse architecture to replace the fully connected architecture in the deep autoencoder while maintaining the performance of these models in the dynamic ***,an adaptive simulated algorithm to find the optimal sparse architecture for the deep autoencoder is *** performance of SPDNE over three dynamical NE models(*** architecture-based deep autoencoder method,DynGEM,and ElvDNE)is evaluated on three well-known benchmark networks and five real-world *** experimental results demonstrate that SPDNE can reduce about 70%of weight parameters of the architecture for the deep autoencoder during the training process while preserving the performance of these dynamical NE *** results also show that SPDNE achieves the highest accuracy on 72 out of 96 edge prediction and network reconstruction tasks compared with the state-of-the-art dynamical NE algorithms.

关键词： deep autoencoder dynamic networks low-dimensional feature space network embedding sparse structure

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Empirical techniques for effort estimation in designing effective ML models

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International Journal of Computers and Applications 2025年第2期47卷 226-234页

作者： Padmanabha Reddy, Y.C.A. Kosuru, Sai Sathwik Sirisalla, Nageswara Rao Vivekananda, G.N. Perala, Venkata Akanksha Department of Artificial Intelligence and Machine Learning Chaitanya Bharati Institute of Technology Telangana Hyderabad India Department of CSE B V Raju Institute of Technology Telangana Narsapur India Department of Computer Science and Engineering K.S.R.M. College of Engineering AP Kadapa India School of Computer Science Engineering and Information Systems Vellore Institute of Technology Vellore India

Machine Learning Research often involves the use of diverse libraries, modules, and pseudocodes for data processing, cleaning, filtering, pattern recognition, and computer intelligence. Quantization of Effort Required for the above cumulative processes is rarely discussed in the existing works and The time to reach the desired level of the model's functionality is essential to gauge the environment training for the model training and pre-deployment testing. In this study, we empirically defined the manual-cum-computational effort required for the model development in terms of 2-time factors: time-to-live (time until 1st code modification) and time-for-modification (time between 2 codebase changes) taken together in a mathematical model to compute Effort Factor(quantitative measure of determining effort needed to design ML algorithms). The study is novel in terms of how the effort required to create ML models is calculated with a particular focus on the manual effort direction. The results and the findings obtained can be used for determining the total time needed to synthesize ML models and frameworks in terms of code change cycles and implementation strategies marking a 25% performance increase in the current method above the Standard Pipeline. © 2025 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Pipeline codes

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