检索结果-内蒙古大学图书馆

IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)

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

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.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Canard Phenomenon of the Snare-Sm Diffusive Model

SSRN

引用

SSRN 2024年

作者： Pan, Cuiyu Liu, Yongjian School of Mathematics and Statistics Guangxi Normal University Guilin541000 China Center for Applied Mathematics of Guangxi Guangxi Colleges Universities Key Laboratory of Complex System Optimization and Big Data Processing Yulin Normal University Yulin537000 China

This paper is devoted to the periodic behaviors of the SNARE-SM model with weak diffusion. More precisely, with the help of geometric singular perturbation theory, we investigate theoretically the existence of relaxation oscillation and canard explosion phenomenon of the SNARE-SM diffusion model. Numerical simulations are also carried out to verify the theoretical results. These dynamic behaviors implies different modes of neurotransmitter release as the ratio of the clamping action of SNARE-SM proteins complexin to the dissociation of the involved proteins has changed. © 2024, The Authors. All rights reserved.

关键词： Proteins

来源：评论

学校读者我要写书评

暂无评论

Wideband polarization reconfigurable antenna based on double C-shaped radiators

Wideband polarization reconfigurable antenna based on double...

引用

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

作者： Liang, Weilong Li, Long Wu, Zhao Huang, Yanhu Ma, Qingxiu Liang, Jiajun Nanjing Research Institute of Electronics Technology Nanjing210000 China Yulin Normal University School of Physics and Telecommunication Engineering Yulin537000 China Guangxi Colleges Universities Key Lab of Complex System Optimization and Big Data Processing Yulin Normal University Yulin537000 China

ISBN: (纸本)9781665452366

An enhancing bandwidth tri-polarization reconfigurable antenna based on double C-shaped radiators is proposed. The antenna consists of a modified ground plane, double C-shaped radiators, and a feedline with a simple parasitic stub. The modified ground plane and the parasitic stub can improve the impedance matching, meanwhile, adjust the axial ratio performance. Two PIN diodes are embedded between the C-shaped radiator and the feedline. Three polarization reconfigurable modes can be achieved caused by switching two PIN diodes state, linear polarization (LP), left-hand circular polarization (LHCP), and right-hand circular polarization (RHCP). As the simulated results show, the -10-dB impedance bandwidth reaches 126.6% (1.76-7.83 GHz) in LP mode and 78.4% (2.96-6.78 GHz) in CP modes. And the proposed antenna has a 3-dB axial ratio (AR) bandwidth of 84% (2.6-6.4 GHz) in two CP modes. Therefore, the proposed antenna can meet the requirement of the modern wireless and satellite communication system. © 2022 IEEE.

关键词： Radiators

来源：评论

学校读者我要写书评

暂无评论

Analysis of solution to an elliptic free boundary value problem equipped with a ‘bad’ data

arXiv

引用

arXiv 2024年

作者： Choudhuri, Debajyoti Zeng, Shengda School of Basic Sciences Indian Institute of Technology Bhubaneswar Khordha Odisha 752050 India Center for Applied Mathematics of Guangxi Guangxi Colleges Universities Key Laboratory of Complex System Optimization and Big Data Processing Yulin Normal University Guangxi Yulin537000 China

关键词： Boundary value problems

来源：评论

学校读者我要写书评

暂无评论

An ECG signal de-noising method combining the improved threshold function and ABC algorithm 3

An ECG signal de-noising method combining the improved thres...

引用

2022 3rd International Conference on Computer Information and big data Applications, CIBDA 2022

作者： Deng, Yanrong Huang, Yanhu School of Information and Communication Guilin University of Electronic Technology Guilin541004 China Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing Yulin Normal University Yulin537000 China Guangxi Key Laboratory of Precision Navigation Technology and Application Guilin University of Electronic Technology Guilin541004 China

ISBN: (纸本)9783800758760

Electrocardiogram (ECG) plays an imperative role in the clinical diagnosis of heart disease and heart abnormalities. In order to obtain the original ECG signal morphology, the wavelet threshold technique is usually used for ECG signal de-noising, in which threshold function and thresholds play very important role. In this paper, an improved threshold function with adjustable shape parameter was structured to improve the problems of the constant deviation in soft threshold function and the discontinuousness in hard threshold function. And then, an optimization strategy based on artificial bee colony algorithm with mean square error (MSE) as the objective function is embedded into the process of de-noising to quickly determine the optimal shape parameter and thresholds. Subsequently, a series of the simulation experiment are carried out by using two benchmark signals and real ECG signal with different noise levels. The signal-to-noise ratio (SNR) and the MSE after de-noising are used as evaluation index of the proposed method. The evaluation results demonstrate that the improved threshold function shows a better performance than the traditional threshold functions under different noise levels, and the proposed method is effective for the selections of the optimal shape parameter and thresholds in ECG signal de-noising. © VDE VERLAG GMBH - Berlin - Offenbach.

关键词： optimization

来源：评论

学校读者我要写书评

暂无评论

TIME PERIODIC SOLUTIONS TO THE EVOLUTIONARY OSEEN MODEL FOR A GENERALIZED NEWTONIAN INCOMPRESSIBLE FLUID

引用

Acta Mathematica Scientia 2023年第4期43卷 1645-1667页

作者：岑金夏 Stanislaw MIGóRSKI Emilio VILCHES 曾生达 School of Mathematical Sciences Zhejiang Normal UniversityJinhua 321004China Jagiellonian University in Krakow Chair of Optimization and Controlul.Lojasiewicza 630348 KrakowPoland Instituto de Ciencias de la Ingenier´ıa Universidad de O’HigginsAv.Libertador Bernardo OHiggins 6112841959 RancaguaChile Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing Yulin Normal UniversityYulin 537000China Department of Mathematics Nanjing University Nanjing 210093China Jagiellonian University in Krakow Faculty of Mathematics and Computer Scienceul.Lojasiewicza 630348 KrakowPoland

In this paper we study a nonstationary Oseen model for a generalized Newtonian incompressible fluid with a time periodic condition and a multivalued,nonmonotone friction ***,a variational formulation of the model is obtained;that is a nonlinear boundary hemivariational inequality of parabolic type for the velocity ***,an abstract first-order evolutionary hemivariational inequality in the framework of an evolution triple of spaces is *** mild assumptions,the nonemptiness and weak compactness of the set of periodic solutions to the abstract inequality are ***,a uniqueness theorem for the abstract inequality is established by using a monotonicity ***,we employ the theoretical results to examine the nonstationary Oseen model.

关键词： nonstationary Oseen model Newtonian incompressible fluid hemivariational inequality periodic solution generalized subgradient

来源：评论

学校读者我要写书评

暂无评论

Gene selection and classification combining information gain ratio with fruit fly optimisation algorithm for single-cell RNA-seq data

Gene selection and classification combining information gain...

引用

作者： Zhang, Jie Feng, Junhong Yang, Xiani Liu, Jianming School of Computer Science and Engineering Guangxi Colleges Universities Key Lab of Complex System Optimization and Big Data Processing Yulin Normal University Guangxi Yulin537000 China Business School Yulin Normal University Guangxi Yulin537000 China

There are a wide range of genes in single-cell data, but some are not beneficial to classification. In order to eliminate these redundant genes and select beneficial genes, this study first utilises the information gain (IG) to select some genes coarsely, then uses the modified fruit fly optimisation algorithm (FOA) to choose the relevant genes refinedly from the subsets after performing IG. The proposed algorithm makes full use of respective advantages of the IG and FOA, and is abbreviated as IGFOA. The proposed algorithm is implemented on multiple scRNA-seq datasets with various numbers of cells and genes, and the obtained results validate that the IGFOA can select effectively some superior genes and acquire good classification performance. Copyright © 2021 Inderscience Enterprises Ltd.

关键词： Genes

来源：评论

学校读者我要写书评

暂无评论

Applications of Generalized Fractional Hemivariational Inequalities in Solid Viscoelastic Contact Mechanics

SSRN

引用

SSRN 2022年

作者： Han, Jiangfeng Li, Changpin Zeng, Shengda Department of Mathematics Shanghai University Shanghai200444 China Guangxi Colleges Universities Key Laboratory of Complex System Optimization and Big Data Processing Yulin Normal University Guangxi 537000 China

This paper studies a generalized fractional hemivariational inequality in infinite-dimensional spaces. Under the suitable assumptions, the existence result is delivered by using the temporally semidiscrete scheme and the surjectivity result for multivalued pseudomonotone operator. As an illustrative application, we propose a frictionless contact model that describes the quasi-static contact between a viscoelastic body and a solid foundation. The viscoelastic constitutive equation is modeled by fractional Kelvin-Voigt law with ψ -Caputo derivative, and the contact condition is expressed as the Clarke subdifferential of a nonconvex and nonsmooth functional. Finally, the weak solvability of the mechanical system is obtained by using our abstract mathematical result. © 2022, The Authors. All rights reserved.

关键词： Viscoelasticity

来源：评论

学校读者我要写书评

暂无评论

Effects of Adaptive Random Deceleration on Traffic Flow

引用

Journal of Applied Mathematics and Physics 2023年第3期11卷 618-628页

作者： Qi Wang Shu Zhu Liuhua Zhu School of computer Jiangsu University of Science and Technology Zhenjiang China School of Physics and Telecommunication Engineering Yulin Normal University Yulin China Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing Yulin China Optoelectronic Information Research Center Yulin Normal University Yulin China

Based on the Nagel-Schreckenberg model, an improved cellular automaton traffic flow model is proposed, in which the random deceleration probability of each vehicle is no longer fixed, but is adaptively adjusted according to the local traffic density in its vision and its current velocity. The numerical simulation results show that the maximum traffic capacity of the improved model under the same parameters is greater than that of the Nagel-Schreckenberg model, and is closer to the measured data. In addition, the traffic flow and vehicle velocity under different meteorological conditions are simulated by using the improved model, and the synchronized flow phenomenon consistent with the actual traffic is reproduced. Meanwhile, the results show that under the same parameters, when the traffic density is equal to 0.3, the traffic flow of the improved model increases by about 11% compared with the original model, and when the traffic density increases to 0.6, the traffic flow increases by about 27%. .

关键词： Traffic Flow Cellular Automaton Adaptive Random Deceleration Synchronized Flow

来源：评论

学校读者我要写书评

暂无评论

Identification and Significance of the Novel MDR Relevant Hub Genes in Drug-Resistant Hepatocellular Carcinoma

SSRN

引用

SSRN 2023年

作者： Xiao, Li Lu, Zheng Zhao, Xuewei Feng, Yang Zhao, Ruixia Qiu, Zuchun Chen, Wei Nie, Guochao Cao, Huiling Hou, Yingchun College of Life Sciences Shaanxi Normal University Xi’an710119 China Xi’an Key Laboratory of Basic and Translation of Cardiovascular Metabolic Disease College of Pharmacy Xi’an Medical University Xi’an710021 China Department of Physics Guangxi Colleges and Universities Key Lab of Complex System Optimization and Big Data Processing Yulin Normal University Guangxi Yulin537000 China

Current chemotherapeutic efficacy is limited by the fast acquisition of multidrug resistance (MDR) with high side effects. In this study, 66 MDR-relevant hub genes in hepatocellular carcinoma (HCC) were identified by the combined analysis of differential expressed genes (DEGs), gene functional enrichment, Cox proportional regression, weighted gene co-expression network analysis (WGCNA) and protein-protein interaction (PPI) network construction. The prognostic risk models were established via the LASSO-Cox regression analysis. Based on the comparison of gene mutation frequency, tumor mutation burden (TMB) and immune infiltration in the high and low-risk groups, the relationships between the MDR-relevant hub genes and immune regulation were explored. The competitive endogenous RNA (ceRNA) networks of MDR-relevant hub genes and relevant non-coding RNAs (ncRNAs) were predicted and concluded to explore the potential mechanisms. Five MDR-relevant hub genes in drug-resistant HCC were finally confirmed, including ATP-binding cassette subfamily B member 6 (ABCB6), filamin C (FLNC), mutated in colorectal cancer (MCC), neuron navigator 3 (NAV3) and tripartite motif containing 9 (TRIM9). TRIM9 was identified as the most significant gene enhancing MDR, and its inhibition caused the IC50 of doxorubicin (DOX) decreased, and the intracellular uptake, retention and absorption of DOX increased significantly in HepG2/ADR cells. The results above may provide new insights into the mechanism of MDR development. With further exploration in future, the MDR-relevant hub genes, especially TRIM9 may be therapeutically targeted to improve the prognosis of drug-resistant HCC patients. © 2023, The Authors. All rights reserved.

关键词： Genes

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：