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5th International Conference on Pattern Recognition and Artificial Intelligence, PRAI 2022

作者： Wu, Yujiao Fang, Zulin Dong, Jianping Zhang, Gexiang Chengdu University of Technology College of Computer Science and Cyber Security Chengdu China Chengdu University of Technology School of Nuclear Technology and Automation Engineering Chengdu China

ISBN: (数字)9781665499163

ISBN: (纸本)9781665499163

Speaker recognition is a task of identifying user's individuality from their speech utterances. Most of the text-independent speaker recognition models available directly input the spectrogram into the deep neural network. However, this does not take full advantage of the spectrogram features. In this paper, we propose a frequency attention module (FAM) based on the fact that the frequency axis in the spectrogram is more representative for speaker feature extraction. It aims to assigning higher weights to important frequency bins, and making the network to extract more features to improve speaker recognition performance. Furthermore, FAM is applied on the convolution output in ResBlock of ResNet34 to capture richer features of the speaker. The experimental results under self-attention pooling (SAP) and attentive-statistics pooling (ASP) show that FAM is feasible and effective. Moreover, the extended experimental results on the Free ST Chinese Mandarin Corpus dataset indicate that the proposed FAM (equal error rate (EER) is 1.59%) outperforms the no-attention ResNet34 (EER is 1.97 %) and spatial-CBAM ResNet34 (EER is 1.88%). © 2022 IEEE.

关键词： Deep neural networks

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Modeling, Computation and Analysis of Gaussian-based Probability Density Function and Conflict Potential Field for Cooperative Overtaking

Modeling, Computation and Analysis of Gaussian-based Probabi...

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2024 China automation Congress, CAC 2024

作者： He, Wen Lv, Menglin Chen, Yong Hao, Jinlong Liu, Mingjie Jiang, Yuhao School of Automation Engineering University of Electronic Science and Technology of China Chengdu China School of Automation Chongqing University of Posts and Telecommunications Chongqing China School of Automation Engineering University of Electronic Science and Technology Chengdu China Chongqing Chang’an Automobile Corp Chengdu China College of Mechanical and Vehicle Engineering Chongqing University Chongqing China

ISBN: (纸本)9798350368604

The collaborative overtaking framework presents significant potential for advancing road traffic safety and operational efficiency in intelligent transportation systems. By enabling instantaneous communication among roadway infrastructure, proximate vehicles, and other traffic entities, the framework facilitates the seamless exchange of critical information. Recognized for its superior performance, it is poised to play a pivotal role in the evolution of next-generation Advanced Driver Assistance Systems (ADAS), particularly with the proliferation of 5G communication technologies. This paper examines fundamental challenges associated with the modeling, computation, and analysis of Gaussian-based probability density functions and conflict potential fields, applying these methodologies to coordinated overtaking systems. Specifically, a Gaussian-based conflict potential field model is introduced alongside a risk assessment methodology designed to enhance overtaking safety by evaluating collision risks through vehicle-to-vehicle communication. Empirical experiments further substantiate the efficacy of the proposed approach, demonstrating notable performance improvements under dynamic and unpredictable driving conditions. © 2024 IEEE.

关键词： Advanced driver assistance systems

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First-Principles Calculations of Phase Transition, Phonon Spectra, Thermodynamic Properties and Elasticity for Puo2 Polymorphs

SSRN

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SSRN 2024年

作者： Ai, Junjie Ma, Tengfei You, Hang Xie, Minghong Tian, Xiaofeng The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu610059 China

The first principles are utilized to calculate the phase transition, phonon spectra, thermodynamic properties, and elasticity of PuO2 under varying pressures. Under the compression condition, the anticipated pressure of phase transition from Fm-3m to Pnma is 26.0 GPa, from Pnma to Cmcm is 112.9 GPa, and from Cmcm to I4/mmm phase is 588.0 GPa. And under tensile conditions, the phase transition pressure of anticipating from Fm-3m phase to P42/mnm and Pnnm phase occur at -8.6 GPa and -8.5 GPa. The phonon spectra of these six structures show that all phases are dynamically stable under the selected pressure. Meanwhile, the verification results of the mechanical stability criterion show that Fm-3m, Pnma, Cmcm and I4/mmm of PuO2 are mechanically stable, nevertheless P42/mnm and Pnnm are unstable in high pressure. The thermodynamic properties were then calculated to further research the patterns of variation in the coefficient of thermal expansion, bulk modulus, Gibbs free energy, and heat capacity with temperature, and these were compared with experimental data. © 2024, The Authors. All rights reserved.

关键词： Elasticity

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Research on Condenser Deterioration Evolution Trend Based on ANP-EWM Fusion Health Degree

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Computer Modeling in engineering & Sciences 2024年第4期139卷 679-698页

作者： Hong Qian Haixin Wang Guangji Wang Qingyun Yan College of Automation Engineering Shanghai University of Electric PowerShanghai200090China Shanghai Key Laboratory of Power Station Automation Technology Shanghai200072China Empower Information Technology(Shanghai)Co. Ltd.Shanghai201508China China Nuclear Power Engineering Design Co. Ltd.Shenzhen518052China

This study presents a proposed method for assessing the condition and predicting the future status of condensers operating in seawater over an extended *** aim is to address the problems of scaling and corrosion,which lead to increased loss of cold *** method involves utilising a set of multivariate feature parameters associated with the condenser as input for evaluation and trend *** methodology offers a precise means of determining the optimal timing for condenser cleaning,with the ultimate goal of improving its overall *** proposed approach involves the integration of the analytic network process with subjective expert experience and the entropy weightmethod with objective big data analysis to develop a fusion health *** mathematical model is constructed quantitatively using the improved Mahalanobis ***,a comprehensive prediction model is developed by integrating the improved Informer model and Markov error *** model takes into account the health status of the equipment and several influencing factors,includingmultivariate feature *** model facilitates the objective examination and prediction of the progression of equipment deterioration *** present study involves the computation and verification of the field time series data,which serves to demonstrate the accuracy of the condenser health-related models proposed in this *** models effectively depict the real condition and temporal variations of the equipment,thus offering a valuable method for determining the precise cleaning time required for the condenser.

关键词： Condenser health degree improved Mahalanobis distance GC-Informer model Markov error correction

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Low Complexity Joint Power and Bandwidth Allocation for 3D Video SoftCast 4

Low Complexity Joint Power and Bandwidth Allocation for 3D V...

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4th International Conference on Computer Communication and the Internet, ICCCI 2022

作者： Thabet, Saqr Khalil Saeed Osei-Mensah, Emmanuel Hassan, Jamal N.A. Bamisile, Olusola University of Electronic Science and Technology of China School of Information and Communication Engineering Chengdu China Chengdu University of Technology College of Nuclear Technology and Automation Engineering Chengdu China

ISBN: (数字)9781665469920

ISBN: (纸本)9781665469920

SoftCast transmission achieves a linear video quality transition commensurate with the wireless channel conditions, allowing it to avoid the cliff effect, unlike the digital video transmission system. When adopting SoftCast for three-dimensional video transmission, several issues arise. 1) Optimally allocate the power budget to texture and depth to minimize transmission distortion. 2) Select the appropriate number of texture and depth chunks to meet the bandwidth constraints. 3) Reduce the 3D video computation complexity. This paper aims to optimally solve the joint power and bandwidth allocation with low complexity. We derive a closed-form based on the power-distortion optimization problem to estimate the optimal power allocation ratio between the texture and depth map. Then to adapt to the bandwidth constraints. We first set the available bandwidth to be shared equally between texture and depth, this joint bandwidth allocation technique reduces the complexity, and to improve the overall 3D video quality, the joint power allocation is estimated at different bandwidth constraints. With low complexity, the proposed method achieves a graceful video quality transition with the improvement of channel conditions under bandwidth constraints and better performance than its counterpart default fixed-ratio power allocation between texture and depth. © 2022 IEEE.

关键词： Bandwidth

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Collision-Free Formation Finite-Time Prescribed Performance Control for Under-Actuated Unmanned Surface Vehicles 6

Collision-Free Formation Finite-Time Prescribed Performance ...

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6th International Conference on Electronic engineering and Informatics, EEI 2024

作者： Wang, Wei Wang, Yang Li, Tieshan Navigation College Dalian Maritime University Dalian China College of Automation Engineering University of Electronic Science and Technology of China Chengdu China

ISBN: (纸本)9798350353594

This paper studies the distributed path-following time-varying formation control problem for a fleet of under-actuated unmanned surface vehicles (USVs) with collision avoidance and connectivity preservation. A finite-time-prescribed performance-based (FTPP) formation control scheme is proposed based on the error transformation. To provide transient and steady-state performance specifications on velocity errors, including convergence time and range, a finite-time performance function (FTPF) is introduced in the control design. Radial basis function neural network (RBF) is utilized to compensate the effects of uncertain dynamics in USVs. Finally, by Lyapunov stability analysis, it is shown that all error signals of the closed-loop system are uniformly ultimately bounded. Simulation results show the effectiveness of the proposed formation control scheme. © 2024 IEEE.

关键词： Unmanned surface vehicles

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Overview of Fault Diagnosis in High Voltage Direct Current Transmission Systems

Overview of Fault Diagnosis in High Voltage Direct Current T...

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IEEE Asia Power and Energy engineering Conference (APEEC)

作者： Zhuofan Zhang Dongsheng Cai Olusola Bamisile Qi Huang The College of Energy Chengdu University of Technology Chengdu China The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China

ISBN: (数字)9798350373479

ISBN: (纸本)9798350373486

This review aims to provide a comprehensive literature overview of the field of fault diagnosis in high-voltage direct current (HVDC) transmission systems. The goal is to summarize and analyze the current state, trends, and key issues in this area. A retrospective examination of the developmental history reveals significant progress in technical innovations related to fault diagnosis in HVDC transmission systems. Additionally, emerging technologies such as big data and artificial intelligence have been introduced, carrying significant implications for the advancement of fault diagnosis in these systems. The paper discusses and elucidates various fault diagnosis methods proposed for HVDC transmission systems, outlining the specific implementation principles and advantages of each approach.

关键词： Fault diagnosis Technological innovation Reviews HVDC transmission High-voltage techniques Power system stability Routing

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Efficient OpenMP Based Z-curve Encoding and Decoding Algorithms

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Computers, Materials & Continua 2025年第1期82卷 1313-1327页

作者： Zicheng Zhou Shaowen Sun Teng Liang Mengjuan Li Fengling Xia School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu611731China Faculty of Information Engineering and Automation Kunming University of Science and TechnologyKunming650500China School of Communications Information Engineering Yunnan Communications Vocational and Technical CollegeKunming650500China Library Yunnan Normal UniversityKunming650500China Faculty of Civil Aviation and Aeronautics Kunming University of Science and TechnologyKunming650500China

Z-curve’s encoding and decoding algorithms are primely important in many Z-curve-based *** bit interleaving algorithm is the current state-of-the-art algorithm for encoding and decoding *** simple,its efficiency is hindered by the step-by-step coordinate shifting and bitwise *** tackle this problem,we first propose the efficient encoding algorithm LTFe and the corresponding decoding algorithm LTFd,which adopt two optimization methods to boost the algorithm’s efficiency:1)we design efficient lookup tables(LT)that convert encoding and decoding operations into table-lookup operations;2)we design a bit detection mechanism that skips partial order of a coordinate or a Z-value with consecutive 0s in the front,avoiding unnecessary iterative *** propose order-parallel and point-parallel OpenMP-based algorithms to exploit the modern multi-core *** results on discrete,skewed,and real datasets indicate that our point-parallel algorithms can be up to 12.6×faster than the existing algorithms.

关键词： Z-curve lookup table OpenMP bit detection mechanism

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RESEARCH ON THE ENERGY RESPONSE OF NAI(TI) DETECTOR USING MONOCHROMATIC X-RAYS 9

RESEARCH ON THE ENERGY RESPONSE OF NAI(TI) DETECTOR USING MO...

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9th International Symposium on Test automation and Instrumentation, ISTAI 2022

作者： Fan, Lipeng Yu, Tao Guo, Siming College of Science Hebei University of Science and Technology Shijiazhuang China Beijing China The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China

ISBN: (纸本)9781839538391

The energy response of the NaI(TI) scintillation detector has been experimentally investigated by a single-crystal monochromatic X-rays beam facility, a double-crystal monochromatic X-rays beam facility and a calibrated HPGe standard detector. The experimental results show that the NaI detector has great energy linearity in the (22-80)keV energy range and the energy resolution better than 26.13%@22keV. These results will contribute to the scientific research and detection work of NaI detector. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Germanium compounds

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Design and Study of a One-Foot, Multi-Suction Structure for a Wall-Climbing Robot

Design and Study of a One-Foot, Multi-Suction Structure for ...

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2022 International Conference on Intelligent Manufacturing and Industrial automation, CIMIA 2022

作者： Cao, YiFan Luo, YaoYao Liu, YanLing Mei, Hao Yang, WenQing Zhang, JiaWei The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Sichuan Chengdu610059 China School of Mechanical and Electrical Engineering Chengdu University of Technology Sichuan Chengdu610059 China

ISBN: (纸本)9781510655966

Wall climbing robots, also known as wall moving robots, are also known abroad as extreme work robots because vertical wall work is beyond human limits. Despite its superior performance, there has been little research on the subject. This paper introduces a vacuum adsorption structure for a one-footed multi-suction wall climbing robot and establishes a one-footed multi-suction model. Using a four-legged wall crawler as a carrier, the basic conditions to be met by this structure are analysed for both the three-legged and four-legged suction states of the wall crawler. The feasibility of attaching the robot to the structure to move on a vertical wall is verified. The deformation of the body is simulated by ansys for the two adsorption states with load forces ranging from 500N to 700N to verify the feasibility of the structure and to derive a range of feasibility. © 2022 SPIE.

关键词： Robot applications

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