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Dynamic Event-Triggered Quadratic Nonfragile Filtering for Non-Gaussian Systems:Tackling Multiplicative Noises and Missing Measurements

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IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1127-1138页

作者： Shaoying wang Zidong wang Hongli Dong yun Chen Guoping Lu College of science Shandong University of AeronauticsBinzhou 256603China College of Electrical engineering and Automation Shandong University of Science and TechnologyQingdao 266590 Department of computer science Brunel University LondonUxbridge UB83PHUK Artificial Intelligence Energy Research Institute Northeast Petroleum UniversityDaqing 163318 Heilongjiang Provincial Key Laboratory of Networking and Intelligent Control Northeast Petroleum UniversityDaqing 163318China school of Automation Hangzhou Dianzi UniversityHangzhou 310018China school of Electrical engineering Nantong UniversityNantong 226019China

This paper focuses on the quadratic nonfragile filtering problem for linear non-Gaussian systems under multiplicative noises,multiple missing measurements as well as the dynamic event-triggered transmission *** multiple missing measurements are characterized through random variables that obey some given probability distributions,and thresholds of the dynamic event-triggered scheme can be adjusted dynamically via an auxiliary *** attention is concentrated on designing a dynamic event-triggered quadratic nonfragile filter in the well-known minimum-variance *** this end,the original system is first augmented by stacking its state/measurement vectors together with second-order Kronecker powers,thus the original design issue is reformulated as that of the augmented ***,we analyze statistical properties of augmented noises as well as high-order moments of certain random *** the aid of two well-defined matrix difference equations,we not only obtain upper bounds on filtering error covariances,but also minimize those bounds via carefully designing gain ***,an example is presented to explain the effectiveness of this newly established quadratic filtering algorithm.

关键词： filtering quadratic bounds

Gria:an efficient deterministic concurrency control protocol

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Frontiers of computer science 2024年第4期18卷 25-37页

作者： Xinyuan wang yun PENG Hejiao HUANG school of computer science and Technology Harbin Institute of TechnologyShenzhen 518055China Institute of Artificial Intelligence and Blockchain Guangzhou UniversityGuangzhou 510006China

Deterministic databases are able to reduce coordination costs in a *** property has fostered a significant interest in the design of efficient deterministic concurrency control ***,the state-of-the-art deterministic concurrency control protocol Aria has three ***,it is impractical to configure a suitable batch size when the read-write set is ***,Aria running in low-concurrency scenarios,e.g.,a single-thread scenario,suffers from the same conflicts as running in high-concurrency ***,the single-version schema brings write-after-write *** address these issues,we propose Gria,an efficient deterministic concurrency control *** has the following ***,the batch size of Gria is ***,Gria’s conflict probability in low-concurrency scenarios is lower than that in high-concurrency ***,Gria has no write-after-write conflicts by adopting a multi-version *** further reduce conflicts,we propose two optimizations:a reordering mechanism as well as a rechecking *** evaluation result on two popular benchmarks shows that Gria outperforms Aria by 13x.

关键词： deterministic concurrency control transaction processing

Ultimately Bounded Output Feedback Control for Networked Nonlinear Systems With Unreliable Communication Channel: A Buffer-Aided Strategy

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维普期刊数据库

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IEEE/CAA Journal of Automatica Sinica 2024年第7期11卷 1566-1578页

作者： Yuhan Zhang Zidong wang Lei Zou yun Chen Guoping Lu the College of Electrical engineering and Automation Shandong University of Science and TechnologyQingdao 266590China IEEE the Department of computer science Brunel UniversityUB83PHUnited Kingdom the College of Information science and Technology Donghua UniversityShanghai 201620 the engineering Research Center of Digitalized Textile and Fashion Technology Ministry of EducationShanghai 201620China the school of Automation Hangzhou Dianzi UniversityHangzhou 310018China the school of Electrical engineering Nantong UniversityNantong 226019China

This paper concerns ultimately bounded output-feedback control problems for networked systems with unknown nonlinear dynamics. Sensor-to-observer signal transmission is facilitated over networks that has communication *** transmissions are carried out over an unreliable communication channel. In order to enhance the utilization rate of measurement data, a buffer-aided strategy is novelly employed to store historical measurements when communication networks are inaccessible. Using the neural network technique, a novel observer-based controller is introduced to address effects of signal transmission behaviors and unknown nonlinear *** the application of stochastic analysis and Lyapunov stability, a joint framework is constructed for analyzing resultant system performance under the introduced controller. Subsequently, existence conditions for the desired output-feedback controller are delineated. The required parameters for the observerbased controller are then determined by resolving some specific matrix inequalities. Finally, a simulation example is showcased to confirm method efficacy.

关键词： Buffer-aided strategy neural networks nonlinear control output-feedback control unreliable communication channel

Improved simulation of winter wheat yield in North China Plain by using PRYM-Wheat integrated dry matter distribution coefficient

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Journal of Integrative Agriculture 2024年第4期23卷 1381-1392页

作者： Xuan Li Shaowen wang Yifan Chen Danwen Zhang Shanshan Yang Jingwen wang Jiahua Zhang yun Bai Sha Zhang Research Center for Remote Sensing and Digital Earth College of Computer Science and TechnologyQingdao UniversityQingdao266071China Center for Geospatial Information Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China school of Geographical sciences Hebei Normal UniversityShijiazhuang 050024China

The accurate simulation of regional-scale winter wheat yield is important for national food security and the balance of grain supply and demand in ***,most remote sensing process models use the“biomass×harvest index(HI)”method to simulate regional-scale winter wheat ***,spatiotemporal differences in HI contribute to inaccuracies in yield simulation at the regional ***-series dry matter partition coefficients(Fr)can dynamically reflect the dry matter partition of winter *** this study,Fr equations were fitted for each organ of winter wheat using site-scale *** equations were then coupled into a process-based and remote sensingdriven crop yield model for wheat(PRYM-Wheat)to improve the regional simulation of winter wheat yield over the North China Plain(NCP).The improved PRYM-Wheat model integrated with the fitted Fr equations(PRYM-Wheat-Fr)was validated using data obtained from provincial yearbooks.A 3-year(2000-2002)averaged validation showed that PRYM-Wheat-Fr had a higher coefficient of determination(R^(2)=0.55)and lower root mean square error(RMSE=0.94 t ha^(-1))than PRYM-Wheat with a stable HI(abbreviated as PRYM-Wheat-HI),which had R^(2) and RMSE values of 0.30 and 1.62 t ha^(-1),*** PRYM-Wheat-Fr model also performed better than PRYM-Wheat-HI for simulating yield in verification years(2013-2015).In conclusion,the PRYM-Wheat-Fr model exhibited a better accuracy than the original PRYM-Wheat model,making it a useful tool for the simulation of regional winter wheat yield.

关键词： dry matter partition remote sensing model winter wheat yield North China Plain

Propagation and Dispersion Characteristics of Scholte Wave in VTI Media with the Presence of Irregular Seabed

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Journal of Earth science 2024年第2期35卷 722-725页

作者： Xiaobo Liu yun wang Jianlei Zhang Haifeng Chen Hua Zhang school of Ocean sciences China University of GeosciencesBeijing 100083China Key Laboratory of Polar Geology and Marine Mineral Resources China University of GeosciencesBeijing 100083China school of Geophysics and Information Technology China University of GeosciencesBeijing 100083China Research&Development Center BGP IncCNPCZhuozhou 072751China National engineering Research Center for Oil and Gas Exploration computer Software Beijing 100080China

INTRODUCTION Surface waves propagating along the seafloor are general ly called Scholte waves,and were first discovered and studied in the early 1950s(Kugler et al.,2005;Buchen and Ben-Hador,1996).Scholte waves exhibit a dispersion phenomenon,which implies that their velocity varies with ***-frequency Scholte waves can propagate over long distances on the seabed with little attenuation(Bohlen et al.,2004).The particle mo tion of Scholte waves in a solid medium changes from a retro grade to a prograde ellipse(Klein et al.,2005;McMechan and Yedlin,1981).

关键词： seabed Dispersion implies

Cleaning of two mirrors in the first mirror unit using radiofrequency capacitively coupled plasma

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Plasma science and Technology 2024年第9期26卷 165-171页

作者： Chenxue wang Rong YAN Yuming LIU Su XU Lei MU Wei ZHENG Rui DING junling CHEN Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China university of science and Technology of China Hefei 230026People’s Republic of China school of computer engineering Anhui Sanlian UniversityHefei 230601People’s Republic of China

First mirror(FM)cleaning,using radio frequency(RF)plasma,has been proposed to recover FM reflectivity in nuclear fusion reactors such as the International Thermonuclear Experimental Reactor(ITER).To investigate the influence of simultaneous cleaning of two mirrors on mirror cleaning efficiency and uniformity,experiments involving single-mirror cleaning and dual-mirror cleaning were conducted using RF capacitively coupled plasma in the *** the test and simultaneous cleaning of two mirrors,the FM and second mirror(SM),both measuring 110 mm×80 mm,were placed inside the first mirror unit(FMU).They were composed of 16 mirror samples,each with a dimension of 27.5 mm×20 *** mirror samples consist of a titanium-zirconium-molybdenum alloy substrate,a 500 nm Mo intermediate layer and a 30 nm Al_(2)O_(3) surface coating as a proxy for Be *** cleaning of a single first mirror(SFM)and the simultaneous cleaning of the FM and SM(DFM and DSM)lasted for 9 h using Ar plasma at a pressure of 1 *** total reflectivity of mirror samples on the DSM did not fully recover and varied with location,with a self-bias of−140 *** a self-bias of−300 V,the total reflectivity of mirror samples on the SFM and DFM was fully *** energy dispersive spectrometer results demonstrated that the Al_(2)O_(3) coating had been completely removed from these mirror ***,the mass loss of each mirror sample on the SFM and DFM before and after cleaning varied depending on its location,with higher mass loss observed for mirror samples located in the corners and lower loss for those in the *** with SM cleaning,the simultaneous cleaning of two mirrors reduced the difference between the highest and lowest mass ***,this mass loss for the mirror samples of the DFM facing the DSM was *** indicated that mirror samples cleaned face to face in the FMU simultaneously could influence each other,highlighting the need for special attention in

关键词： first mirror unit dual-mirror cleaning reflectivity sputtering rate

Applying Hybrid Clustering in Pulsar Candidate Sifting with Multi-modality for FAST Survey

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Research in Astronomy and Astrophysics 2024年第3期24卷 283-296页

作者： Zi-Yi You yun-Rong Pan Zhi Ma Li Zhang Shuo Xiao Dan-Dan Zhang Shi-Jun Dang Ru-Shuang Zhao Pei wang Ai-Jun Dong Jia-Tao Jiang Ji-Bing Leng Wei-An Li Si-Yao Li school of Physics and Electronic science Guizhou Normal UniversityGuiyang 550025China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang 550025China College of Big Data and Information engineering Guizhou UniversityGuiyang 550025China CAS Key Laboratory of FAST National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Key Laboratory of Information and Computing Guizhou Province Guizhou Normal UniversityGuiyang 550001China school of Big data and computer science Guizhou Normal UniversityGuiyang 550025China Guizhou Software engineering Research Center Guiyang 550000China

Pulsar search is always the basis of pulsar navigation,gravitational wave detection and other research ***,the volume of pulsar candidates collected by the Five-hundred-meter Aperture Spherical radio Telescope(FAST)shows an explosive growth rate that has brought challenges for its pulsar candidate filtering ***,the multi-view heterogeneous data and class imbalance between true pulsars and non-pulsar candidates have negative effects on traditional single-modal supervised classification *** this study,a multi-modal and semi-supervised learning based on a pulsar candidate sifting algorithm is presented,which adopts a hybrid ensemble clustering scheme of density-based and partition-based methods combined with a feature-level fusion strategy for input data and a data partition strategy for *** on both High Time Resolution Universe SurveyⅡ(HTRU2)and actual FAST observation data demonstrate that the proposed algorithm could excellently identify pulsars:On HTRU2,the precision and recall rates of its parallel mode reach0.981 and 0.988 *** FAST data,those of its parallel mode reach 0.891 and 0.961,meanwhile,the running time also significantly decreases with the increment of parallel nodes within ***,we can conclude that our algorithm could be a feasible idea for large scale pulsar candidate sifting for FAST drift scan observation.

关键词： methods data analysis-surveys-methods numerical

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单阶段安全帽检测深度学习算法综述

计算机工程与应用 2024年第16期60卷 61-75页

作者：管含宇凌云汪舒磊苏州科技大学电子与信息工程学院江苏苏州215000

安全帽佩戴实时检测是智慧工地和智慧交通必不可少的一部分,基于深度学习的安全帽检测逐渐取代了传统的检测方法,在精度、性能和效率等方面取得了显著进展,在现实场景中有了广泛的应用。为了便于安全帽算法的研究,综合分析了各应用场景... 详细信息

安全帽佩戴实时检测是智慧工地和智慧交通必不可少的一部分,基于深度学习的安全帽检测逐渐取代了传统的检测方法,在精度、性能和效率等方面取得了显著进展,在现实场景中有了广泛的应用。为了便于安全帽算法的研究,综合分析了各应用场景中安全帽目标检测算法的研究现状。总结了目标检测算法的发展历史;对近年来国内外学者的安全帽检测算法研究进行归纳,对比总结了不同算法不同优化的优缺点,着重分析了安全帽检测算法的轻量化方法;根据目前目标检测算法在实际应用场景中出现的不足,对安全帽检测的深度学习算法的未来研究方向进行了展望。

关键词：深度学习目标检测算法安全帽检测

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基于跨语种声学分析的帕金森病检测方法

电子与信息学报 2024年第2期46卷 546-554页

作者：季薇王传瑜吴迪李云郑慧芬南京邮电大学通信与信息工程学院南京210003 南京邮电大学计算机学院南京210023 南京医科大学附属老年医院南京210024

基于语音的帕金森病检测具有非介入式、成本较低和无创等优点。当前公开的帕金森病语音数据集大多来源于单一语种,存在数据容量不够大、受试者母语发音特点差异小等特点。单一语种数据集上训练的帕金森病检测模型在面对跨语种语音数据时... 详细信息

基于语音的帕金森病检测具有非介入式、成本较低和无创等优点。当前公开的帕金森病语音数据集大多来源于单一语种,存在数据容量不够大、受试者母语发音特点差异小等特点。单一语种数据集上训练的帕金森病检测模型在面对跨语种语音数据时,将出现性能下降。为避免语种差异带来的影响,提升模型在跨语种场景下的检测性能,该文引入对抗迁移学习和特征解耦的思想,提出一种帕金森病跨语种声学分析模型(CLSAM)。首先,将基于多头自注意力机制的Transformer编码块和多层神经网络级联,组成特征提取器模块,用于将从源域和目标域语音中提取的原始Fbank语音特征初步解耦为两个向量,即域不变病理信息表征向量和域信息表征向量;设计了目标任务不一致的双重对抗训练模块,显式地分离域不变病理信息和域信息;最终,提取跨语种语音数据中的域不变病理信息用于帕金森病检测。该文在公开的MaxLittle帕金森病语音数据集以及自采的帕金森病语音数据集上,采用十折交叉验证的方法验证了所提方法的有效性。实验结果表明:与传统机器学习方法以及现有的迁移学习算法相比,所提模型在跨语种场景中的检测准确率、敏感度和F1分数等性能均有明显提升。

关键词：跨语种声学分析帕金森病对抗迁移学习特征解耦