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Combined CNN LSTM with attention for speech emotion recognition based on feature-level fusion

Multimedia Tools and Applications 2024年第21期83卷 59839-59859页

作者： Liu, Yanlin Chen, Aibin Zhou, Guoxiong Yi, Jizheng Xiang, Jin Wang, Yaru Institute of Artificial Intelligence Application College of Computer and Information Engineering Central South University of Forestry and Technology Hunan Changsha410004 China Hunan Key Laboratory of Intelligent Logistics Technology Central South University of Forestry and Technology Hunan Changsha410004 China

According to the problem that emotional features cannot be well represented by a single feature and it is difficult to extract in the task of Speech Emotion Recognition (SER), we propose a Feature-Level (FL) fusion method for 9 types of acoustic features and a combined CNN-LSTM network with attention (CNN-A-LSTM). The feature vector set after feature-level fusion is used as the input of CNN-A-LSTM network, which contains prosodic features and spectral features. High-level Statistical Functions (HSFs) are also added to receive global features. The feature extraction network CNN-A-LSTM can more effectively read time-series input and extract speech emotion information. Finally, Softmax is applied as a classifier to obtain the final emotion classification results. The experiment is verified on SAVEE and CASIA datasets. The experimental results show that the method in this paper has the best effect compared with the state-of-the-art, and the accuracy rates of 94.5% and 96.7% are respectively gained on SAVEE and CASIA. The above results prove the effectiveness of the algorithm in this paper with some generalization. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023.

关键词： Speech recognition

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Research on the Blockchain Introduction Strategy of Cross-border Dual-Channel Supply Chain Based on Tax Differences 13

Research on the Blockchain Introduction Strategy of Cross-bo...

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13th International Conference on logistics and Systems Engineering

作者： Jiang, Lin Yao, Aibo Li, Wei School of Management Wuhan University of Science and Technology Hubei Wuhan430070 China School of Economics and Trade Hunan University Changsha Hunan410006 China Hunan Key Laboratory of Logistics Information and Simulation Technology Changsha Hunan410006 China

ISBN: (纸本)9781713896708

Driven by the extensive utilization of blockchain technology in supply chain management and cross-border trade, this paper develops a cross-border dual-channel supply chain comprised of a domestic manufacturer, a domestic cross-border e-commerce company, and an overseas physical store, aiming to study the impacts of tax differences, market competition intensity, and consumers' sensitivity to products with blockchain attributes on the strategies for adopting blockchain technology. Through simulation analysis, this study compares blockchain investment efforts, wholesale prices, retail prices, and the profits generated by supply chain members across different scenarios. Findings reveal that the adoption of blockchain technology by the domestic manufacturer enables the other two members to benefit from a free-riding effect, thus enhancing the supply chain's overall profitability. Second, in scenarios where the domestic manufacturer introduces blockchain technology, the profits of supply chain members are higher than in other cases. Third, from a profit maximization perspective, both the domestic manufacturer and the overseas physical store should implement blockchain technology. The domestic cross-border e-commerce company should flexibly adapt its blockchain introduction strategy based on the decisions made by the other two members. Finally, market competition intensity, tax differences, and consumers’ sensitivity to products with blockchain attributes will affect the profits of supply chain members under different scenarios. Therefore, all supply chain members should closely monitor these factors. © 2024 Proceedings of the 13th International Conference on logistics and Systems Engineering. All rights reserved.

关键词： Taxation

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Adaptive SOM neural network algorithm 3

Adaptive SOM neural network algorithm

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3rd International Conference on Artificial Intelligence, Automation, and High-Performance Computing, AIAHPC 2023

作者： Wang, Xin Yan, Taishan School of Information Science and Engineering Hunan Institute of Science and Technology Hunan Yueyang China Hunan Institute of Science and Technology School of Information Science and Engineering China Key Laboratory of Hunan Province on Intelligent Control and Optimization of Complex Industrial Logistics System Hunan Yueyang China

ISBN: (数字)9781510666580

ISBN: (纸本)9781510666573

In order to improve the performance of traditional SOM model, an adaptive SOM neural network algorithm is proposed. By introducing the error square sum solution formula, the clustering error of the model sub-data set is calculated by using the method of cutting the data set, and the change trend of the clustering error is quickly obtained. Then the learning rate of the SOM network is adaptively adjusted according to this, and the convergence speed is accelerated on the basis of ensuring that the network is fully trained, thereby improving the performance of the SOM network. © 2023 SPIE.

关键词： Errors

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Two Physics-Based Schwarz Preconditioners for Three-Temperature Radiation Diffusion Equations in High Dimensions

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Communications in Computational Physics 2022年第8期32卷 829-849页

作者： Xiaoqiang Yue Jianmeng He Xiaowen Xu Shi Shu Libo Wang National Center for Applied Mathematics in Hunan Key Laboratory of Intelligent Computing&Information Processing of Ministry of EducationHunan Key Laboratory for Computation and Simulation in Science and EngineeringXiangtan UniversityXiangtan 411105P.R.China Laboratory of Computational Physics Institute of Applied Physics and ComputationalMathematicsBeijing 100094P.R.China College of Information Science and Technology JinanUniversityGuangzhou 510632P.R.China

We concentrate on the parallel,fully coupled and fully implicit solution of the sequence of 3-by-3 block-structured linear systems arising from the symmetrypreserving finite volume element discretization of the unsteady three-temperature radiation diffusion equations in high *** this article,motivated by[***,***,***,SIAM *** ***.33(2012)653–680]and[***,***,***,***.442(2021)110513],we aim to develop the additive and multiplicative Schwarz preconditioners subdividing the physical quantities rather than the underlying domain,and consider their sequential and parallel implementations using a simplified explicit decoupling factor approximation and algebraic multigrid subsolves to address such linear ***,computational efficiencies and parallel scalabilities of the proposed approaches are numerically tested in a number of representative real-world capsule implosion benchmarks.

关键词： Radiation diffusion equations Schwarz methods algebraic multigrid parallel and distributed computing

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A Convergence Analysis of a Structure-Preserving Gradient Flow Method for the All-Electron Kohn-Sham Model

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Numerical Mathematics(Theory,Methods and Applications) 2023年第3期16卷 597-621页

作者： Yedan Shen Ting Wang Jie Zhou Guanghui Hu School of Mathematics and Information Science Guangzhou UniversityGuangzhouChina Faculty of Science and Technology University of MacaoMacao SARChina Hunan Key Laboratory for Computation and Simulation in Science and Engineering Xiangtan UniversityXiangtanChina School of Mathematical Computational Sciences Xiangtan UniversityXiangtanChina Zhuhai UM Science&Technology Research Institute ZhuhaiChina Guangdong-Hong Kong-Macao Joint Laboratory for Data-Driven Fluid Mechanics and Engineering Applications University of MacaoMacao SARChina

In[Dai et al.,***.18(4)(2020)],a structure-preserving gradient flow method was proposed for the ground state calculation in Kohn-Sham density functional theory,based on which a linearized method was developed in[Hu et al.,EAJAM.13(2)(2023)]for further improving the numerical *** this paper,a complete convergence analysis is delivered for such a linearized method for the all-electron Kohn-Sham ***,the convergence,the asymptotic stability,as well as the structure-preserving property of the linearized numerical scheme in the method is discussed following previous works,while spatially,the convergence of the h-adaptive mesh method is demonstrated following[Chen et al.,***.12(2014)],with a key study on the boundedness of the Kohn-Sham potential for the all-electron Kohn-Sham *** examples confirm the theoretical results very well.

关键词： Kohn-Sham density functional theory gradient flow model structure-preserving linear scheme convergence analysis

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FETD Study of theWave Propagation in Chiral Metamaterials

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Advances in Applied Mathematics and Mechanics 2021年第1期13卷 191-202页

作者： Lei Yang Fuhao Liu Wei Yang Faculty of Information Technology Macao University of Science and TechnologyMacaoChina School of Mathematics and Computational Science Xiangtan UniversityXiangtanHunan 411105China Hunan Key Laboratory for Computation and Simulation in Science and Engineering and School of Mathematics and Computational Science Xiangtan UniversityXiangtanHunan 411105China

In this paper,we propose a finite element time-domain(FETD)method for the Maxwell’s equations in chiral metamaterials(CMMs).The time-domain model equations are constructed by the auxiliary differential equations(ADEs)*** source excitation method entitled total-field and scattered-field(TF/SF)decomposition technique is applied to FETD method for the first time in simulating the propagation of electromagnetic wave in CMMs,based on which a unified ADE-FETD-UPMLTF/SF scheme is proposed to simulate the wave in *** following properties of CMMs can be observed successfully from the numerical experiments based on our method,i.e.,the ability of the polarization rotation,and the negative phase *** amplitude of reflected wave can effectively be controlled by the physical parameters of CMMs.

关键词： Maxwell’s equations finite element time-domain(FETD) chiral metamaterials(CMMs).

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A Hybrid Intelligent Algorithm for the Fuzzy Open Vehicle Routing Problem with Risk Preference

SSRN

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SSRN 2022年

作者： Cao, Erbao Wang, Xin Tang, Chunhua School of Economics and Trade Hunan University Changsha410079 China Hunan Province Key Laboratory of Logistics Information and Simulation Technology Changsha410079 China School of Management Hunan University of Finance and Economics Changsha410205 China

This paper investigates the impact of decision-makers risk preference and open vehicle routes in fuzzy demand situations. A two-stage framework is proposed when the customer demand is a trapezoidal fuzzy variable. The planned distance cost is first calculated, and then the additional route cost due to service failure is considered when the customer demand is revealed. A novel fuzzy programming with recourse (FPR) model formulation of the open vehicle routing problem with trapezoidal fuzzy demand (OVRPFD) is developed. A hybrid heuristic algorithm combining Monte Carlo simulation (MCS), genetic algorithm (GA), and adaptive large neighborhood search algorithm (ALNS) is proposed to solve the problem. The efficiency of the algorithms is compared in the experiments, and the effects of the decision-makers risk preference on the planned route cost, additional route cost, and total cost are investigated separately. The computational experimental results show that the planned route cost and additional route cost change as the decision-makers' risk preference changes, and the total cost first decreases and then increases. © 2022, The Authors. All rights reserved.

关键词： Genetic algorithms

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The interior penalty virtual element method for fourth-order singular perturbation problems

arXiv

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arXiv 2023年

作者： Feng, Fang Yu, Yue School of Mathematics and Statistics Nanjing University of Science and Technology Nanjing China School of Mathematics and Computational Science Hunan Key Laboratory for Computation and Simulation in Science and Engineering Key Laboratory of Intelligent Computing and Information Processing Ministry of Education Xiangtan University Hunan Xiangtan411105 China

This paper is dedicated to the numerical solution of a fourth-order singular perturbation problem using the interior penalty virtual element method (IPVEM) proposed in [42]. The study introduces modifications to the jumps and averages in the penalty term, as well as presents an automated mesh-dependent selection of the penalty parameter. Drawing inspiration from the modified Morley finite element methods, we leverage the conforming interpolation technique to handle the lower part of the bilinear form. Through our analysis, we establish optimal convergence in the energy norm and provide a rigorous proof of uniform convergence concerning the perturbation parameter in the lowest-order case. © 2023, CC BY-NC-ND.

关键词： Numerical methods

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A posteriori error estimation for an interior penalty virtual element method of Kirchhoff plates

arXiv

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arXiv 2024年

作者： Feng, Fang Hu, Yuming Yu, Yue Zhao, Jikun School of Mathematics and Statistics Nanjing University of Science and Technology Nanjing China Hunan Key Laboratory for Computation and Simulation in Science and Engineering Key Laboratory of Intelligent Computing and Information Processing of Ministry of Education National Center for Applied Mathematics in Hunan School of Mathematics and Computational Science Xiangtan University Hunan Xiangtan411105 China School of Mathematics and Statistics Zhengzhou University Zhengzhou450001 China

In this paper, we develop a residual-type a posteriori error estimation for an interior penalty virtual element method (IPVEM) for the Kirchhoff plate bending problem. Building on the work in [18], we adopt a modified discrete variational formulation that incorporates the H1-elliptic projector in the jump and average terms. This allows us to simplify the numerical implementation by including the H1-elliptic projector in the computable error estimators. We derive the reliability and efficiency of the a posteriori error bound by constructing an enriching operator and establishing some related error estimates that align with C0-continuous interior penalty finite element methods. As observed in the a priori analysis, the interior penalty virtual elements exhibit similar behaviors to C0continuous elements despite its discontinuity. This observation extends to the a posteriori estimate since we do not need to account for the jumps of the function itself in the discrete scheme and the error estimators. As an outcome of the error estimator, an adaptive VEM is introduced by means of the mesh refinement strategy with the one-hanging-node rule. Numerical results from several benchmark tests confirm the robustness of the proposed error estimators and show the efficiency of the resulting adaptive VEM. Copyright © 2024, The Authors. All rights reserved.

关键词： Discrete element methods

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SURFACE CHARGE ACCUMULATION UNDER NANOSECOND PULSE DISCHARGE AND ITS EFFECT ON THE BREAKDOWN VOLTAGE OF THE GAS SWITCH 22

SURFACE CHARGE ACCUMULATION UNDER NANOSECOND PULSE DISCHARGE...

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22nd International Symposium on High Voltage Engineering, ISH 2021

作者： Zhong, Lipeng Deng, Yongchao Chen, Zhiqiang Jia, Wei Guo, Fan College of Electrical and Information Engineering Hunan University Changsha China State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear Technology Xi'an China

ISBN: (纸本)9781839536052

The surface charge can reduce the breakdown voltage of the gas switch and then effect the insulation performance of the pulsed power device. In order to quantify the effect of the surface charges generated by nanosecond pulse discharge on the breakdown voltage of gas switch, this paper set up an experimental platform for charge accumulation under the action of the nanosecond pulse voltage. Two-dimensional distribution of surface charges on the tank wall after the negative pulse discharge was measured, and the effect of the surface charge generated by pulse voltage on the breakdown voltage of gas gap was also studied. The results shown that all surface potentials are negative under the action of negative pulse. The potential of the upper surface is greater than the lower for the sample, and the maximum potential of the sample surface is up to about 0.5kV. In addition, the surface charge generated by pulse discharge can reduce the breakdown voltage by 7.6% in the device insulated by air. Finally, the surface charge may have a more significant effect on the pulse discharge at lower voltages. © 2021 The Institution of Engineering and technology.

关键词： Electric breakdown

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