Complex engineering systems (Alhambra, Calif.)最新文献_第4页

Pulsar identification based on generative adversarial network and residual network 基于生成对抗网络和残差网络的脉冲星识别

Complex engineering systems (Alhambra, Calif.) Pub Date : 2022-01-01 DOI: 10.20517/ces.2022.30

Zelun Bao, Guiru Liu, Yefan Li, Yanxi Xie, Yang Xu, Zifeng Zhang, Qian Yin, Xin Zheng

{"title":"Pulsar identification based on generative adversarial network and residual network","authors":"Zelun Bao, Guiru Liu, Yefan Li, Yanxi Xie, Yang Xu, Zifeng Zhang, Qian Yin, Xin Zheng","doi":"10.20517/ces.2022.30","DOIUrl":"https://doi.org/10.20517/ces.2022.30","url":null,"abstract":"The search for pulsars is an important area of study in modern astronomy. The amount of collected pulsar data is increasing exponentially as the performance of modern radio telescopes improves, necessitating the improvement of the original pulsar search methods. Artificial intelligence techniques are currently being used in pulsar candidate identification tasks. However, improving the accuracy of pulsar candidate identification using artificial intelligence techniques remains a challenge. Because the amount of collected data is so large, the number of real pulsar samples is very limited, which leads to a serious sample imbalance problem. Many existing methods ignore this issue, making it difficult for the model to reach the optimal solution. A framework combining generative adversarial networks and residual networks is proposed to greatly alleviate the problem of sample inequality. The framework first generates stable pulsar images using generative adversarial networks and then designs a deep neural network model based on residual networks to identify pulsar candidates using intra-block and inter-block residual connectivity. The ResNet approach has a better ability to fit the data than the CNN approach and can achieve the extraction of features with more classification ability with a smaller dataset. Meanwhile, the data expanded by the high-quality simulated samples generated by the generative adversarial network can provide richer identification features and improve the identification accuracy for pulsar candidates.","PeriodicalId":72652,"journal":{"name":"Complex engineering systems (Alhambra, Calif.)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67657452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Improved impedance/admittance switching controller for the interaction with a variable stiffness environment 改进的阻抗/导纳切换控制器与变刚度环境的相互作用

Complex engineering systems (Alhambra, Calif.) Pub Date : 2022-01-01 DOI: 10.20517/ces.2022.16

A. Formenti, G. Bucca, Asad Ali Shahid, D. Piga, L. Roveda

{"title":"Improved impedance/admittance switching controller for the interaction with a variable stiffness environment","authors":"A. Formenti, G. Bucca, Asad Ali Shahid, D. Piga, L. Roveda","doi":"10.20517/ces.2022.16","DOIUrl":"https://doi.org/10.20517/ces.2022.16","url":null,"abstract":"Hybrid impedance/admittance control aims to provide an adaptive behavior to the manipulator in order to interact with the surrounding environment. In fact, impedance control is suitable for stiff environments, while admittance control is suitable for soft environments/free motion. Hybrid impedance/admittance control, indeed, allows modulating the control actions to exploit the combination of such behaviors. While some work has addressed the proposed topic, there are still some open issues to be solved. In particular, the proposed contribution aims: (i) to satisfy the continuity of the interaction force in the switching from impedance to admittance control when a feedforward velocity term is present; and (ii) to adapt the switching parameters to improve the performance of the hybrid control framework to better exploit the properties of both impedance and admittance controllers. The proposed approach was compared in simulation with the standard hybrid impedance/admittance control in order to show the improved performance. A Franka EMIKA panda robot was used as a reference robotic platform to provide a realistic simulation.","PeriodicalId":72652,"journal":{"name":"Complex engineering systems (Alhambra, Calif.)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67657038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

A distributed electricity energy trading strategy under energy shortage environment 能源短缺环境下的分布式电能交易策略

Complex engineering systems (Alhambra, Calif.) Pub Date : 2022-01-01 DOI: 10.20517/ces.2022.20

Qian Xu, Chutian Yu, Xiang Yuan, Zao Fu, Hongzhe Liu

引用次数: 2

Performance assessment of pantograph and overhead system based on a vertical coupling dynamics model of the railway system 基于铁路系统垂直耦合动力学模型的受电弓与高架系统性能评估

Complex engineering systems (Alhambra, Calif.) Pub Date : 2022-01-01 DOI: 10.20517/ces.2022.09

Yang Song, F. Duan

{"title":"Performance assessment of pantograph and overhead system based on a vertical coupling dynamics model of the railway system","authors":"Yang Song, F. Duan","doi":"10.20517/ces.2022.09","DOIUrl":"https://doi.org/10.20517/ces.2022.09","url":null,"abstract":"The increase of train speed leads to a violent vibration of the pantograph and overhead system. To evaluate the interaction performance of the pantograph and overhead system, a whole railway dynamics model including the track, vehicle, pantograph, and overhead system is established. The overhead system is represented by the finite element approach using the analytical formulas of nonlinear cable and truss elements. The vehicle is modeled by a multi-rigid-body system with a pantograph installed on its roof. A beam element with elastic foundations is used to model the track, which possesses harmonic and random irregularities. An iterative algorithm is implemented to solve the nonlinear behavior of the coupling model. The nonlinearities in the deformation of overhead system, the contact of the pantograph and contact line, and the contact of the vehicle-track are properly considered. Several numerical simulations are implemented to systematically investigate the influence of the vehicle-track vibration on the dynamic behavior of pantograph and overhead system. The results indicate that the vehicle-track vibration induced by the rail irregularities with large amplitude or certain wavelength can significantly aggravate the interaction performance of pantograph and overhead system.","PeriodicalId":72652,"journal":{"name":"Complex engineering systems (Alhambra, Calif.)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67656986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Online monitoring of batch processes combining subspace design of latent variables with support vector data description 隐变量子空间设计与支持向量数据描述相结合的间歇过程在线监测

Complex engineering systems (Alhambra, Calif.) Pub Date : 2021-10-09 DOI: 10.20517/ces.2021.02

Zhaomin Lv

引用次数: 2

Developments of digital twin technologies in industrial, smart city and healthcare sectors: a survey 数字孪生技术在工业、智慧城市和医疗保健领域的发展:调查

Complex engineering systems (Alhambra, Calif.) Pub Date : 2021-09-30 DOI: 10.20517/ces.2021.06

Daoguang Yang, H. Karimi, O. Kaynak, Yin Shen

{"title":"Developments of digital twin technologies in industrial, smart city and healthcare sectors: a survey","authors":"Daoguang Yang, H. Karimi, O. Kaynak, Yin Shen","doi":"10.20517/ces.2021.06","DOIUrl":"https://doi.org/10.20517/ces.2021.06","url":null,"abstract":"Digitization and digitalization have already changed our world significantly. Further disruptions are imminent with the ongoing digital transformation, a major component of which is digital twins. As the big data techniques, Internet of Things, cloud computing, and artificial intelligence algorithms advance, the digital twin technology has entered a phase of rapid development. It has been stated to be one of the top ten most promising technologies. Although it is still in its early stages, digital twins are already being widely used in a variety of fields, especially in industry, smart cities, and smart health, which are points that attract most researchers to study. In the literature, there can be seen numerous articles and reviews on digital twins, published every year in these three fields. It is therefore timely, even necessary, to provide an analysis of the published work. This is the motivation behind this article, the focus of which is the major research and application areas of digital twins. The survey first analyzes the recent developments of digital twins, then summarizes the theoretical underpinnings of the technology, and finally concludes with specific developments in various application areas of digital twins. It also discusses the challenges that may be encountered in the future.","PeriodicalId":72652,"journal":{"name":"Complex engineering systems (Alhambra, Calif.)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45903568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Model predictive control for single-phase three-level grid-connected F-type inverters 单相三电平F型并网逆变器的模型预测控制

Complex engineering systems (Alhambra, Calif.) Pub Date : 2021-09-23 DOI: 10.20517/ces.2021.07

N. Guler, H. Komurcugil, S. Biricik, H. Karimi

{"title":"Model predictive control for single-phase three-level grid-connected F-type inverters","authors":"N. Guler, H. Komurcugil, S. Biricik, H. Karimi","doi":"10.20517/ces.2021.07","DOIUrl":"https://doi.org/10.20517/ces.2021.07","url":null,"abstract":"This paper presents a model predictive control (MPC) method for single-phase three-level grid-connected F-type inverters. The main control objective in grid-connected inverters is to regulate the grid current with low total harmonic distortion. Since the F-type inverter has emerged recently, there is no specific control method developed for this inverter topology in the literature yet. In this paper, the mathematical model of the F-type inverter and the design of model predictive control is presented. Since the dc capacitor voltage balancing is essential for F-type inverters, both current control and dc capacitor voltage controllers are combined in a multi-objective cost function. Thus, the control of the dc and ac sides of the F-type inverter is achieved successfully. The theoretical considerations were verified through simulation studies. The effectiveness of the proposed MPC method was investigated in the steady state as well as dynamic transients under variations in grid current, input dc voltage, and grid voltage. The simulation results show that the grid current and dc capacitor voltages are successfully controlled in all operating conditions.","PeriodicalId":72652,"journal":{"name":"Complex engineering systems (Alhambra, Calif.)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49344505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Complex Engineering Systems 复杂工程系统

Complex engineering systems (Alhambra, Calif.) Pub Date : 2021-04-30 DOI: 10.20517/CES.2021.01

H. Karimi

引用次数: 1

Observer-based integral sliding mode control of nonlinear systems with application to single-link flexible joint robotics 基于观测器的非线性系统积分滑模控制在单连杆柔性关节机器人中的应用

Complex engineering systems (Alhambra, Calif.) Pub Date : 2021-01-01 DOI: 10.20517/ces.2021.05

Qi Liu, Zhen-xiong Cai, Jie Chen, Baoping Jiang

引用次数: 1

Research on federated learning method for fault diagnosis in multiple working conditions 多工况下故障诊断的联邦学习方法研究

Complex engineering systems (Alhambra, Calif.) Pub Date : 2021-01-01 DOI: 10.20517/ces.2021.08

F. Zhou, Zhiqiang Zhang, Sijie Li

{"title":"Research on federated learning method for fault diagnosis in multiple working conditions","authors":"F. Zhou, Zhiqiang Zhang, Sijie Li","doi":"10.20517/ces.2021.08","DOIUrl":"https://doi.org/10.20517/ces.2021.08","url":null,"abstract":"As one of the critical components of rotating machinery, fault diagnosis of rolling bearings has great significance. Although deep learning is useful in diagnosing rolling bearing faults, it is difficult to diagnose the faults of bearings under multiple operating conditions. To overcome the above-mentioned problem, this paper designs a modular federated learning network for fault diagnosis in multiple working conditions by using dynamic routing technology as the federation strategy for federated learning of the multiple modular neural network. First, according to different working conditions, the collected multi-working condition data are divided into different groups for feeding of modular network to extract the local features under different working conditions. Then, an additional deep neural network is constructed to extract the feature involved in data without working condition division. Finally, the global adaptive feature extraction of each working condition can be obtained by designing a federated strategy based on dynamic routing technology to achieve the weights allocation scheme of the modular neural network. The bearing dataset of Case Western Reserve University is taken as a benchmark dataset to verify the effectiveness of the proposed method.","PeriodicalId":72652,"journal":{"name":"Complex engineering systems (Alhambra, Calif.)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67656815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1