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Low complexity Joint Spectrum Resource and Power Allocation for Ultra Dense Networks

China Communications 2023年第5期20卷 104-118页

作者： Qiang Wang Yanhu Huang Qingxiu Ma Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing Yulin Normal UniversityYulin 537000China

In this paper,we propose a low complexity spectrum resource allocation scheme cross the access points(APs)for the ultra dense networks(UDNs),in which all the APs are divided into several AP groups(APGs)and the total bandwidth is divided into several narrow band spectrum resources and each spectrum resource is allocated to APGs independently to decrease the interference among the ***,we investigate the joint spectrum and power allocation problem in UDNs to maximize the overall *** problem is formulated as a mixed-integer nonconvex optimization(MINCP)problem which is difficult to solve in *** joint optimization problem is decomposed into two subproblems in terms of the spectrum allocation and power allocation *** the spectrum allocation,we model it as a auction problem and a combinatorial auction approach is proposed to tackle *** addition,the DC programming method is adopted to optimize the power allocation *** decrease the signaling and computational overhead,we propose a distributed algorithm based on the Lagrangian dual *** results illustrate that the proposed algorithm can effectively improve the system throughput.

关键词： ultra dense networks resource allocation combinatorial auction optimization algorithm

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Effects of Reduced Frequency on Network Configuration and Synchronization Transition

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Chinese Physics Letters 2016年第5期33卷 14-17页

作者：朱留华 Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing College of Physics Science and Engineering TechnologyYulin Normal University

Synchronization of networked phase oscillators depends essentially on the correlation between the topological structure of the graph and the dynamical property of the elements. We propose the concept of ＇reduced frequency＇, a measure which can quantify natural frequencies of each pair of oscillators. Then we introduce an evolving network whose linking rules are controlled by its own dynamical property. The simulation results indicate that when the linking probability positively correlates with the reduced frequency, the network undergoes a first-order phase transition. Meanwhile, we discuss the circumstance under which an explosive synchronization can be ignited. The numerical results show that the peculiar butterfly shape correlation between frequencies and degrees of the nodes contributes to an explosive synchronization transition.

关键词： of work as it Effects of Reduced Frequency on Network Configuration and Synchronization Transition is that

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A novel quantum genetic algorithm with the application in LS-SVR 5

A novel quantum genetic algorithm with the application in LS...

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2023 5th International Conference on Artificial Intelligence Technologies and Applications, ICAITA 2023

作者： Xiang, Hao Guangxi Colleges and Universities Key Lab. of Complex System Optimization and Big Data Processing Yulin Normal University Yulin537000 China

The characteristics of LS-SVR are analyzed. LS-SVR is fitted for modeling small samples and high dimensional data, but the performance of LS-SVR is related to the specific data distribution, the kind of kernel function, its related kernel parameter, and the penalty coefficient. In this paper, the radial basis function is applied as the kernel function of LS-SVR, and the real double-chain coding target gradient quantum genetic algorithm (DCQGA) is applied to optimize the kernel parameter and penalty item coefficient of LS-SVR, then the regression prediction model DCQGALSSVR is proposed. It is of great significance to build an accurate and reliable fault prediction model for the health monitoring and fault diagnosis of liquid rocket engines. The thrust of a liquid rocket engine is an important factor in its health monitoring. By predicting the thrust change value and comparing the predicted value with the engine thrust threshold, it can be predicted whether the engine will fail at a certain time. In this paper, the proposed DCQGALSSVR model is used to model the thrust of a liquid rocket engine. The simulation results show that the average relative error is 0.37% using LSSVR for modeling on 12 test samples, and is 0.3186% using DCQGALSSVR on the same samples. It can be seen that DCQGALSSVR is effective for the health monitoring of liquid rocket engines, so it has a certain promotion significance. © Published under licence by IOP Publishing Ltd.

关键词： Radial basis function networks

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The improved quantum genetic algorithm with its application in fault diagnosis 3

The improved quantum genetic algorithm with its application ...

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2023 3rd International Conference on Computer, Remote Sensing and Aerospace, CRSA 2023

作者： Xiang, Hao Guangxi Colleges and Universities Key Lab. of Complex System Optimization and Big Data Processing Yulin Normal University Yulin537000 China

In this paper, by analyzing the characteristics of the simulated annealing algorithm (SA) and the real double-chain coding target gradient quantum genetic algorithm (DCQGA), the real double-chain coding target gradient quantum genetic simulated annealing algorithm (DCQGSAA) is proposed. Because the performance of LSSVR is extraordinarily sensitive to its key parameters, the proposed algorithm is used to optimize these parameters, then a hybrid non-parametric prediction model is put forward. This model is used in fault prediction of liquid rocket engine thrust. The simulation results show that the proposed model is effective for small samples and multi-dimensional fault prediction. © Published under licence by IOP Publishing Ltd.

关键词： Simulated annealing

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Wideband and Low-Profile Filtering Antenna Based on Metasurface and CRSS

Wideband and Low-Profile Filtering Antenna Based on Metasurf...

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2023 Cross Strait Radio Science and Wireless Technology Conference, CSRSWTC 2023

作者： Li, Long Liang, Jiajun Wu, Zhao Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing Yulin Normal University Yulin537000 China

ISBN: (纸本)9798350358971

In this article, we introduce a filtering antenna with broadband and a compact design. It leverages metasurface (MTS) technology in conjunction with the complementary split ring resonator (CSRR) topology. The antenna consists of three parts, including the feeding line, the aperture layer, and the MTS layer. The MTS is excited by a coupled aperture cut out of the ground plane. Besides, the CSRR is loaded on the ground plane to utilize the resonant characteristic and obtain a low-frequency radiation null. Furthermore, the MTS is made up of non-uniform rectangle units and a rectangle ring slot is etched in the outer elements. Due to the non-uniformity of the MTS and the rectangle ring slot, the excited current of the MTS at high frequency is neutralized and two high-frequency radiation nulls are obtained. Hence, the filtering function of the antenna is achieved. In the simulation, the antenna shows a wide -10-dB impedance bandwidth of 40.8% and a good out-of-band radiation suppression level of more than 15 dB. Meanwhile, the antenna has a low prolife of 0.06 λ (at the center operating frequency) and a peak gain of 8 dBi. © 2023 IEEE.

关键词： complementary split ring resonator filtering antenna metasurface wideband

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Broadband tri-polarization reconfigurable filtering antenna based on metasurface 11

Broadband tri-polarization reconfigurable filtering antenna ...

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11th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2023 - Proceedings

作者： Li, Long Wu, Zhao Liang, Jiajun Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing Yulin Normal University Yulin537000 China

ISBN: (纸本)9798350326277

A wideband tri-polarization reconfigurable metasurface (MTS) antenna with a filtering function is presented in this article. The proposed antenna consists of two layers, which are the coupled aperture layer and MTS layer. The antenna is excited by a microstrip printed on the bottom of the aperture layer, and the ground plane is fabricated on the top. A reconfigured coupled aperture achieved polarization diversity is etched on the ground plane. Additionally, the complementary split ring resonator (CSRR) is loaded on the ground plane and introduced a low-frequency radiated null. Six sets of PIN diodes are inserted on the microstrip and the reconfigured coupled aperture. By controlling the PIN diodes, polarization diversity is obtained, including linear polarization (LP), right-hand circular polarization (RHCP), and left-hand circular polarization (LHCP) modes. Besides, the MTS is manufactured on the top of the MTS layer. A high-frequency radiated null is realized by the non-uniform MTS. Thus, a polarization diversity with filtering performance antenna based on non-uniform is proposed. The simulated results show the antenna has a wide impedance bandwidth (IMBW) of 41.4% and 45.6% for LP and CP modes, respectively. While the antenna is operated in CP modes, an overlapped 3-dB axial ratio (AR) bandwidth reaches 16.2% for both CP modes. Meanwhile, the out-of-band radiation suppression level is more than 14.6 dB and 17 dB for LP and CP modes. © 2023 IEEE.

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Absorption enhancement in thin film a-Si solar cells with double-sided SiO_2 particle layers

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Chinese Physics B 2015年第10期24卷 186-190页

作者：陈乐王庆康沈向前陈文黄堃刘代明 Key Laboratory for Thin Film and Micro-fabrication of the Ministry of Education Department of Microelectronics and NanoscienceShanghai Jiao Tong University School of Physical Science and Technology Engineering Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data ProcessingYulin Normal University

Light absorption enhancement is very important for improving the power conversion efficiency of a thin film a-Si solar cell. In this paper, a thin-film a-Si solar cell model with double-sided SiO2 particle layers is designed, and then the underlying mechanism of absorption enhancement is investigated by finite difference time domain（FDTD） simulation;finally the feasible experimental scheme for preparing the SiO2 particle layer is discussed. It is found that the top and bottom SiO2 particle layers play an important role in anti-reflection and light trapping, respectively. The light absorption of the cell with double-sided SiO2 layers greatly increases in a wavelength range of 300 nm-800 nm, and the ultimate efficiency increases more than 22% compared with that of the flat device. The cell model with double-sided SiO2 particle layers reported here can be used in varieties of thin film solar cells to further improve their performances.

关键词： thin film a-Si solar cells light trapping anti-reflection Si02 particle

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SINGULAR DOUBLE PHASE EQUATIONS

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Acta Mathematica Scientia 2023年第3期43卷 1031-1044页

作者：刘振海 Nikolaos S.PAPAGEORGIOU Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing Yulin Normal UniversityYulin537000China Guangxi Key Laboratory of Hybrid Computation and IC Design Analysis Guangxi Minzu UniversityNanning530006China Department of Mathematics National Technical UniversityZografou Campus15780AthensGreece

We study a double phase Dirichlet problem with a reaction that has a parametric singular term. Using the Nehari manifold method, we show that for all small values of the parameter, the problem has at least two positiv... 详细信息

关键词： double phase singular term unbalanced growth Musielak-Orlice spaces Nehari manifold positive solutions

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ANISOTROPIC(p,q)-EQUATIONS WITH COMPETITION PHENOMENA

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Acta Mathematica Scientia 2022年第1期42卷 299-322页

作者： Zhenhai LIU Nikolaos S.PAPAGEORGIOU Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing Yulin Normal UniversityYulin 537000China Guangxi Key Laboratory of Hybrid Computation and IC Design Analysis Guangxi University for NationalitiesNanning 530006China Department of Mathematics National Technical UniversityZografou Campus15780 Athens.Greece

We consider a nonlinear Robin problem driven by the anisotropic(p,q)-Laplacian and with a reaction exhibiting the competing effects of a parametric sublinear(concave) term and of a superlinear(convex) *** prove a bifurcation-type theorem describing the changes in the set of positive solutions as the parameter *** also prove the existence of a minimal positive solution and determine the monotonicity and continuity properties of the minimal solution map.

关键词： concave-convex nonlinearities anisotropic operators regularity theory maximum principle minimal positive solution

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A GENERALIZED PENALTY METHOD FOR DIFFERENTIAL VARIATIONAL-HEMIVARIATIONAL INEQUALITIES

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Acta Mathematica Scientia 2022年第1期42卷 247-264页

作者： Liang LU Lijie LI Mircea SOFONEA Guangxi Key Laboratory of Cross-border E-commerce Intelligent Information Processing Guangxi University of Finance and EconomicsNanning 530003China Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing Yulin Normal UniversityYulin 537000China Laboratoire de Mathématiques et Physique Universitéde Perpignan Via Domitia52 Avenue Paul Alduy66860 PerpignanFrance

We consider a differential variational-hemivariational inequality with constraints,in the framework of reflexive Banach *** existence of a unique mild solution of the inequality,together with its stability,was proved in[1].Here,we complete these results with existence,uniqueness and convergence results for an associated penalty-type *** this end,we construct a sequence of perturbed differential variational-hemivariational inequalities governed by perturbed sets of constraints and penalty *** prove the unique solvability of each perturbed inequality as well as the convergence of its solution to the solution of the original ***,we consider a mathematical model which describes the equilibrium of a viscoelastic rod in unilateral *** weak formulation of the model is in a form of a differential variational-hemivariational inequality in which the unknowns are the displacement field and the history of the *** apply our abstract penalty method in the study of this inequality and provide the corresponding mechanical interpretations.

关键词： differential variational-hemivariational inequality generalized penalty method Mosco convergence viscoelastic rod unilateral constraint

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