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2022 International Applied Computational Electromagnetics Society Symposium, ACES-China 2022

作者： Song, Hang Zhang, Yuning Liu, Jiaqi Ai, Lihong Zhang, Shengiun National Key Laboratory of Science & Technology on Test Physics and Numerical Mathematics Beijing China Captial Aerospace Machinery Coporation Limited Beijing China

ISBN: (纸本)9781665452366

In this paper, a typical uniform unmagnetized two-dimensional plasma photonic crystal with a single linear defect mode is simulated based on the finite difference time domain method, and the effects of defect mode position and size on its photonic band gaps characteristics are explored respectively. the research can provide an idea for tuning the electromagnetic properties of two-dimensional plasma photonic crystals. © 2022 IEEE.

关键词： Finite difference time domain method

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Spatial diffusion model and simulation analysis of the heterogeneous un-magnetized jet plasma 45

Spatial diffusion model and simulation analysis of the heter...

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45th EPS Conference on Plasma physics, EPS 2018

作者： Wu, Runhui Liu, Jiaqi Meng, Gang Chai, Song Liu, Xin Ren, Aimin Yan, Feng Beijing Institute of Space Long March Vehicle National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing100076 China

ISBN: (纸本)9781510868441

In this paper, the spatial distribution characteristics of electron density are calculated based on the plasma jet diffusion model. The computed results are compared with the results of numerical calculation, validation test results. Researches of the paper are demonstrated that the plasma electron density is attenuated as the approximate exponential with increasing distance from the nozzle exit, the closer distance from the nozzle exit, the greater the attenuation slope, on the far away from the nozzle exit, the electron density attenuation with distance is the flat state. This method is simple and efficient, and it is a good tool to solve engineering calculation problems. © Copyright (2018) by European Physical Society (EPS) All rights reserved.

关键词： Plasma jets

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numerical and feasibility study of onboard MHD power extraction on supersonic vehicle 45

Numerical and feasibility study of onboard MHD power extract...

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45th EPS Conference on Plasma physics, EPS 2018

作者： Chai, Song Meng, Gang Wu, Runhui Liu, Jiaqi Liu, Xin Sun, Ruiqi Beijing Institute of Space Long March Vehicle National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing100076 China

ISBN: (纸本)9781510868441

Within this paper, a concept model containing main features of on-board magnetohydrodynamic (MHD) generators has been constructed and its feasibility of power extraction on supersonic vehicle for a typical flight condition has been studied numerically. The results revealed that the MHD generator is capable of providing substantial energy output up to tens of kilowatts per square meter or even several hundred kilowatts if the alkali-seeded boundary layer has been coated. © Copyright (2018) by European Physical Society (EPS) All rights reserved.

关键词： Magnetohydrodynamic converters

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A New One-Dimensional Photonic Crystals for Infrared Emission Modulation

A New One-Dimensional Photonic Crystals for Infrared Emissio...

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2022 International Applied Computational Electromagnetics Society Symposium, ACES-China 2022

作者： Zhang, Yuning Zhang, Shengjun Song, Hang Cui, Yichun Liu, Jiaqi Ai, Lihong National Key Laboratory of Science & Technology on Test Physics and Numerical Mathematics Beijing China Capital Aerospace Machinery Corporation Limited Beijing China

ISBN: (纸本)9781665452366

With the wide application of infrared detection in the military field, the problem of how to reduce the probability of military targets being detected and identified has become urgent. In this paper, one-dimensional photonic crystals with wide incidence angle range are analyzed and simulated. The reflectance and transmittance properties of different structures are discussed with application in modulation of infrared emission. © 2022 IEEE.

关键词： Photonic crystals

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The Island Rule with lateral and bottom friction

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Acta Oceanologica Sinica 2019年第4期38卷 146-153页

作者： Yanzhao Yang Zexun Wei Guanlin Wang Zhan Lian Liwei Wang College of Meteorology and Oceanography National University of Defense Technology College of Mathematical Science and Physics Qingdao University of Science and Technology Key Laboratory of Marine Science and Numerical Modeling First Institute of OceanographyMinistry of Natural Resources Laboratory for Regional Oceanography and Numerical Modeling Pilot National Laboratory for Marine Science and Technology (Qingdao)

The Island Rule, derived from the Sverdrup theory, is widely used to estimate and analyze water transport through a strait. Previous studies presented single-or multi-island rules with either lateral or bottom friction. In this paper,an analytical model of wind-driven circulation is assumed based on linear dynamics. Considering both lateral and bottom friction, the analytic solutions of the transport streamfunction around the islands are derived and the volume transport through the channel is presented. The results are similar to those of Wajsowicz, but the frictional constants represent different values. The analytic solution shows that the relationship between the lateral frictional and bottom frictional dissipation is complex in terms of the frictional constants. To understand the interaction between the two friction types, lateral and bottom friction values were randomly chosen on a barotropic beta plane. The result shows an approximately linear relationship between the lateral and bottom friction in consisting of the combined frictional constants. We studied the effect of the channel width on the transport through the channel. The results show that the friction enhances the flow under some widths, which is similar to the flow behavior when only the lateral friction is considered. We also compared the transport through the channel at different depths and founded that the deeper the water, the smaller the transport reduction ratio when the horizontal eddy viscosity coefficient and the bottom drag coefficient remained constants. To further present the combined role of lateral frictional and bottom frictional dissipation, we compared our model with the model of Wajsowicz for two islands, where only the lateral or bottom friction were considered, with different channel widths. The results showed that the effect of the lateral friction is greater than the bottom friction when the channel is narrow, especially in the Munk boundary layer thickness. When the channel is

关键词： Island Rule lateral friction bottom friction transport streamfunction

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Analysis of infrared radiation properties of SiC particles with different microstructures

Analysis of infrared radiation properties of SiC particles w...

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2022 International Applied Computational Electromagnetics Society Symposium, ACES-China 2022

作者： Li, Yanan Wang, Qun Dong, Shikui Cui, Yichun Gao, Lu Ai, Xia Beijing University of Technology Beijing China National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematics Beijing China Harbin Institute of Technology Harbin China

ISBN: (纸本)9781665452366

In order to control the infrared radiation properties by adjusting the micro morphology of SiC particles, we analyze the radiation characteristics of solid and hollow SiC particles with different scales. The results show that the particle size has a great influence on the radiation characteristics of SiC spherical solid particles, and the particle thickness directly affects the amplitude changes of extinction and scattering absorption peaks of SiC spherical hollow particles with small scale (d=100nm). © 2022 IEEE.

关键词： Particle size

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A Physical Layer key Generation method with Reliable Negotiation

A Physical Layer Key Generation method with Reliable Negotia...

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2019 IEEE International Conference on Signal, Information and Data Processing, ICSIDP 2019

作者： Wang, Yuchen Wu, Xuanli Xu, Zhicong Wu, Wei Li, Hu Zhang, Ran School of Electronics and Information Engineering Harbin Institude of Technology Harbin China National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing China

ISBN: (纸本)9781728123455

There is a risk of information leakage in the process of wireless communication. The introduction of key generation in the physical layer can effectively improve the security of wireless communication. This paper proposes a new physical layer key generation method in the TDD (time division duplex) communication system. Assume that the uplink and downlink channels are reciprocal. Through LDPC (Low Density Parity Check)channel coding and negotiation algorithm, the inconsistency rate of key generation between Alice and Bob is reduced. Simulation and analysis results show that the method improves the key generation rate and reduces the key inconsistency rate. © 2019 IEEE.

关键词： Hash functions

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Influence of clusters on radiation properties of Si3N4particles

Influence of clusters on radiation properties of Si3N4partic...

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2022 International Applied Computational Electromagnetics Society Symposium, ACES-China 2022

ISBN: (纸本)9781665452366

We analyze the radiation characteristics of Si3N4 elementary particles based on Mie theory, and Si3N4 cluster particles by GMM theory. The results show that the larger the Si3N4 cluster particles, the larger the extinction factor and scattering factor, which variation trend is similar to that of the elementary particles with the same scale, and the position of the scattering peak is also similar to that of the elementary particles. The influence of cluster particles on the amplitude of absorption factor is relatively small, but some absorption characteristic peaks disappear, which is very different from the elementary particles with the same scale. © 2022 IEEE.

关键词： Silicon compounds

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Influence of particle size distribution on the radiation characteristics of SiC particle swarm 9

Influence of particle size distribution on the radiation cha...

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9th Symposium on Novel Photoelectronic Detection technology and Applications

作者： Yanan, Li Xia, Ai Lu, Gao Shikui, Dong Beijing University of Technology Beijing China National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematics Beijing China Harbin Institute of Technology Harbin China

ISBN: (纸本)9781510664432

Based on electromagnetic scattering mechanism, Mie scattering theory and Monte Carlo method are used to analyze the radiation characteristics of SiC particle swarm with different distribution forms in this paper. The study find that the form of particle size distribution has a significant impact on the spectral transmittance of particle swarms. The proportion of particles of different sizes in the particle size distribution, the dispersion of particle size distribution, and the span of particle size scale all affect the infrared extinction performance of particle swarms in varying degrees. Among them, the proportion of particles of specific size in the particle size distribution is the most one, which is a necessary factor to ensure the existence and amplitude of particle characteristic spectra. The relationship between particle size distribution and radiation characteristics was deeply analyzed, and the results showed that increasing the proportion of particles within the 0.16~2.5µm particle size range of SiC particle can comprehensively improve the extinction performance of SiC particle swarm, which is of practical significance for optimizing the infrared radiation performance of particle swarms. © 2023 SPIE.

关键词： Particle size analysis

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Piecewise Linear Recursive Convolution Method Applied in One-dimensional Unmagnetized Plasma

Piecewise Linear Recursive Convolution Method Applied in One...

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2022 International Applied Computational Electromagnetics Society Symposium, ACES-China 2022

作者： Liu, Jiaqi Meng, Gang Mu, Lei Gao, Lu Mo, Jinjun Wu, Runhui Wang, Weidong National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematics Beijing China Guilin University of Electronic Technology School of Information and Communication Guilin China

ISBN: (纸本)9781665452366

The piecewise linear recursive convolution(PLRC) method based on finite difference time domain(FDTD) is used to calculate the reflection and transmission characteristics of electromagnetic waves from one-dimensional unmagnetized plasma. The results are shown that this method has obvious advantages in accurately calculating the electromagnetic problems of one-dimensional, small-scale and thin-layer dielectric materials. © 2022 IEEE.

关键词： Electromagnetic waves

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