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基于TCN-Bi-GRU和交叉注意Transformer的多模态情感识别

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陕西科技大学学报 2025年第1期43卷 161-168页

作者：李嘉华陈景霞白义民陕西科技大学电子信息与人工智能学院陕西西安710021

多模态语音情感识别是近年来在自然语言处理和机器学习领域备受关注的研究方向之一,不同模态的数据存在异构性和不一致性,将不同模态信息有效地融合起来并学习到高效的表示形式是一个挑战.为此,本文提出了一种新的基于时序信息建模和交... 详细信息

多模态语音情感识别是近年来在自然语言处理和机器学习领域备受关注的研究方向之一,不同模态的数据存在异构性和不一致性,将不同模态信息有效地融合起来并学习到高效的表示形式是一个挑战.为此,本文提出了一种新的基于时序信息建模和交叉注意力的多模态语音情感识别模型.首先采用时间卷积网络(Time Convolutional Network,TCN)提取语音、文本和视频数据的深层时序特征,使用双向门控递归单元(Bidirectional Gated Recurrent Unit,Bi-GRU)捕捉序列数据的上下文信息,提高模型对序列数据的理解能力.然后基于交叉注意力机制和Transformer构建多模态融合网络,用于挖掘并捕获音频、文本和视觉特征之间交互的情感信息.此外,在训练过程中引入弹性网络正则化(Elastic Net Regularization)防止模型过拟合,最后完成情感识别任务.在IEMOCAP数据集上,针对快乐、悲伤、愤怒和中性四类情感的分类实验中,准确率分别为87.6%、84.1%、87.5%、71.5%,F1值分别为85.1%、84.3%、87.4%、71.4%.加权平均精度为80.75%,未加权平均精度为82.80%.结果表明,所提方法实现了较好的分类性能.

关键词：语音识别多模态情感识别时间卷积网络交叉注意力机制弹性网络

Effects of Preprocessing Method on TVOC Emission of Car Mat

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Journal of Thermal Science 2013年第1期22卷 80-85页

作者： min Wang Li jia1 Department of Power Engineering School of Mechanical and Electronic Control Engineering Beijing Jiaotong University Key Laboratory of Urban Stormwater System and Water Environment ministry of Education

The effects of the mat preprocessing method on total volatile organic compounds （TVOC） emission of car mat are studied in this paper. An appropriate TVOC emission period for car mat is suggested. The emission factors for to- tal volatile organic compounds from three kinds of new car mats are discussed. The car mats are preprocessed by washing, baking and ventilation. When car mats are preprocessed by washing, the TVOC emission for all samples tested are lower than that preprocessed in other methods. The TVOC emission is in stable situation for a mini- mum of 4 days. The TVOC emitted from some samples may exceed 25001ag/kg. But the TVOC emitted from washed Polyamide （PA） and wool mat is less than 25001ag/kg. The emission factors of total volatile organic com- pounds （TVOC） are experimentally investigated in the case of different preprocessing methods. The air tempera- ture in environment chamber and the water temperature for washing are important factors influencing on emission of car mats.

关键词： TVOC Mat Environment chamber Preprocessing method Emission

Full experimental determination of tunneling time with attosecond-scale streaking method

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Light(Science & Applications) 2022年第8期11卷 1903-1908页

作者： Miao Yu Kun Liu min Li jiaqing Yan Chuanpeng cao jia Tan Jintai Liang Keyu Guo Wei cao Pengfei Lan Qingbin Zhang Yueming Zhou Peixiang Lu Wuhan National Laboratory for Optoelectronics and School of Physics Huazhong University of Science and Technology430074WuhanChina jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Physical Science and TechnologySuzhou University of Science and Technology215009SuzhouChina Optics Valley Laboratory 430074HubeiChina

Tunneling is one of the most fundamental and ubiquitous processes in the quantum *** question of how long a particle takes to tunnel through a potential barrier has sparked a long-standing debate since the early days of quantum ***,we propose and demonstrate a novel scheme to accurately determine the tunneling time of an *** this scheme,a weak laser field is used to streak the tunneling current produced by a strong elliptically polarized laser field in an attoclock configuration,allowing us to retrieve the tunneling ionization time relative to the field maximum with a precision of a few *** overcomes the difficulties in previous attoclock measurements wherein the Coulomb effect on the photoelectron momentum distribution has to be removed with theoretical models and it requires accurate information of the driving laser *** demonstrate that the tunneling time of an electron from an atom is close to zero within our experimental *** study represents a straightforward approach toward attosecond time-resolved imaging of electron motion in atoms and molecules.

关键词： tunneling quantum scheme

A reduced order model for coupled mode cascade flutter analysis

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Chinese Journal of Aeronautics 2022年第10期35卷 176-182页

作者： Huang HUANG Xinkai jia jia REN Bochao cao Dingxi WANG Xiuquan HUANG School of Power and Energy Northwestern Polytechnical UniversityXi'an 710072China Yangtze River Delta Research Institute of Northwestern Polytechnical University Taicang 215400China Department of Aeronautics and Astronautics Fudan UniversityShanghai 200433China

A Reduced Order Model(ROM)based analysis method for turbomachinery cascade coupled mode flutter is presented in this *** unsteady aerodynamic model is established by a system identification technique combined with a set of Aerodynamic Influence Coefficients(AIC).Subsequently,the aerodynamic model is encoded into the state space and then coupled with the structural dynamic equations,resulting in a ROM of the cascade *** cascade flutter can be determined by solving the eigenvalues of the ***-torsional coupled mode flutter analysis for the Standard Configuration Eleven(SC11)cascade is used to validate the proposed method.

关键词： Aerodynamic influence coefficients Chirp signal Coupled mode flutter Eigenvalue problem Reduced order model

Double minimum creep processing and mechanism forγ'strengthened cobalt-based superalloy

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Journal of Materials Science & Technology 2022年第17期112卷 123-129页

作者： jia Chen min Guo min Yang Lin Liu Jun Zhang State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China

The double minimum creep,characterized by two creep rate minima,in Co-based superalloy is investigated using a phase-field model coupled with a crystal plasticity *** constitutive modeling,based on the dislocation slip theory considering dislocation interaction,is applied to simulate microstructural evolution and deformation *** process commences at the beginning of creep until the global minimum of creep rate is reached,demonstrating a strengthening effect from N-type rafts under compressive *** high shear strain rate of(111)[011]slip system in the intersections of horizontal and verticalγchannels leads to a slight increase of creep rate after the first local *** evolution of stress field shows that the softening effect is the combined effect of the increase of resolved shear stress and the decrease of hardening stress in the ***,these changes in stress are primarily caused by the dislocation annihilation and the inhomogeneous plastic *** study indicates that the intermediate local softening stage during creep may be eliminated if the initial inter-distance betweenγ’precipitates is decreased.

关键词： Cobalt-based superalloy Phase-field simulation Creep γ’precipitates Slip system

The aliphatic hydrocarbon distributions of terrestrial plants around an alpine lake： a pilot study from Lake Ximencuo, Eastern Qinghai-Tibet Plateau

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Frontiers of Earth Science 2018年第3期12卷 600-610页

作者： Yang PU Jihong jia Jicheng cao School of Geographical Sciences Nanjing University of Information Science & Technology Nanjing 210044 China

As part of an investigation of the sources of aliphatic hydrocarbons to the sediments of alpine Lake Ximencuo, leaves of the eight dominant vascular plants were collected and their hydrocarbon contents were analyzed. A series of unsaturated aliphatic hydrocarbons were identified in the plant leaves; in particular, Festuca sp. contain a series of n-alkadienes that have rarely been reported in previous studies. The comparison of n-alkane proxies （ACL27 33, ACLT, Paq, and CPI） and δ13Corg among plant leaves, surface soils, and lake sediments suggests that organic proxies have been altered to varying degrees during the transport and burial process of organic materials. It is believed that microbial reworking and source changes have great impacts on organic proxies in the alpine lake system. In addition, the cluster analysis for plant leaves depending on n-alkane compositions and the ACLT proxy generates similar results. Accordingly, we postulate that the average chain length of plant waxes might be a potential indicator of plant classification in regions such as the Qinghai-Tibet Plateau.

关键词： plant leaves alpine lake n-alkanes n-alka-dienes Qinghai-Tibet Plateau (QTP)

3D Road Network Modeling and Road Structure Recognition in Internet of Vehicles

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Computer Modeling in Engineering & Sciences 2024年第2期138卷 1365-1384页

作者： Dun cao jia Ru jian Qin Amr Tolba Jin Wang min Zhu College of Computer and Communication Engineering Changsha University of Science and TechnologyChangsha410114China Department of Computer Science Community CollegeKing Saud UniversityRiyadh11437Saudi Arabia College of Information Science and Technology Zhejiang Shuren UniversityHangzhou310015China

Internet of Vehicles (IoV) is a new system that enables individual vehicles to connect with nearby vehicles,people, transportation infrastructure, and networks, thereby realizing amore intelligent and efficient transportationsystem. The movement of vehicles and the three-dimensional (3D) nature of the road network cause the topologicalstructure of IoV to have the high space and time *** modeling and structure recognition for 3Droads can benefit the description of topological changes for IoV. This paper proposes a 3Dgeneral roadmodel basedon discrete points of roads obtained from GIS. First, the constraints imposed by 3D roads on moving vehicles areanalyzed. Then the effects of road curvature radius (Ra), longitudinal slope (Slo), and length (Len) on speed andacceleration are studied. Finally, a general 3D road network model based on road section features is *** paper also presents intersection and road section recognition methods based on the structural features ofthe 3D road network model and the road features. Real GIS data from a specific region of Beijing is adopted tocreate the simulation scenario, and the simulation results validate the general 3D road network model and therecognitionmethod. Therefore, thiswork makes contributions to the field of intelligent transportation by providinga comprehensive approach tomodeling the 3Droad network and its topological changes in achieving efficient trafficflowand improved road safety.

关键词： Internet of vehicles road networks 3D road model structure recognition GIS

Catalytic asymmetric synthesis of sulfur-containing atropisomers by C-S bond formations

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Science China Chemistry 2023年第12期66卷 3331-3346页

作者： Ren-Fei cao Zhi-min Chen School of Chemistry and Chemical Engineering Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsShanghai Jiao Tong UniversityShanghai 200240China

Chiral organosulfur compounds are not only widely distributed in bioactive natural products and pharmaceuticals,but also play a significant role in chiral ligands/*** the history of synthetic organic chemistry,chemists have been absorbed in the construction of centrally chiral organosulfur ***,there are relatively few reports on installing sulfur functional groups into axially chiral *** is one of the fundamental phenomena in nature,which ubiquitously exists in natural *** more than a century of development,atropisomers have been designed and extensively applied to pharmaceuticals,functional materials and chiral ligands/*** to the importance of chiral sulfurcontaining atropisomers,there is an increasing demand for enantioselective synthesis of ***,a diversity of approaches by C-S bond formations have been established for the construction of enantioenriched sulfur-containing atropisomers,however,there is no comprehensive review to summarize this great *** this mini-review,we summarize recent progress in catalytic asymmetric synthesis of sulfur-containing atropisomers by C-S bond formations,which includes sulfur nucleophilic reactions,sulfur electrophilic reactions and sulfur radical ***,the reaction mechanisms are also *** hope that this mini-review will enable more researchers to further explore this field.

关键词： atropisomers asymmetric catalysis C-S bond formations chiral organosulfur compounds

Micro-arc Oxidation Inverter Power Supply Based on the Limited Bipolar Soft-switch Control Method

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Chinese Journal of Mechanical Engineering 2009年第3期22卷 390-394页

作者： ZENG min CHEN Xiaohong cao Biao School of Mechanical and Automotive Engineering South China University of Technology Guangzhou 510640 China

In order to overcome many limitations of the conventional power supplies, such as ponderosity, big wastage, and simplex output characteristic, a dual-inverter power supply is designed to meet the different requirements of micro-arc oxidation. The main circuit structure and principle of the dual-inverter power supply for micro-arc oxidation is described, the control system and the control adjustment method are also introduced. The dual-inverter technology is adopted in micro-arc oxidation power supply. The limited bipolar control mode is applied in the power inverter circuit for adjusting the voltage, and various voltage waveform can be obtained by controlling the chopper circuit. Meanwhile, the control accuracy and response speed are improved greatly because of the higher inverter frequency. The power supply can output direct current（DC） waveform, DC pulse waveform, symmetry alternating current（AC） waveform, asymmetry AC waveform, and so on. Besides, the parameters such as pulse width, range, frequency, duty cycle can be adjusted. The experimental result shows that the power supply has many advantages, such as stable output, wonderful waveform consistency and obvious advantage in technique, and it can meet the requirements of micro-arc oxidation process fully.

关键词： micro-arc oxidation power supply inverter chopper limited bipolar