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8th International Conference on Electrical, Mechanical and Computer engineering, ICEMCE 2024

作者： Ma, Jijun Guo, Yulong Wang, YuNing Shi, Yongkang Beijing Research Institute of Telemetry Beijing100074 China Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai Engineering Research Center of Intelligent Control and Management Department of Automation Shanghai200240 China Research Institute of Telemetry Beijing China

ISBN: (纸本)9798331506230

The coarse pointing assembly (CPA), as the outer loop of the laser terminal, its tracking stability is the basis for ensuring laser communication. This paper presents the model of the CPA. Aiming at the disturbance factors in the low-speed operation process of the CPA, an active disturbance rejection control (ADRC) method for the position loop of the CPA is designed based on the generalized proportional integral observer (GPIO) to achieve disturbance compensation control. Finally, simulations are carried out on the system model. The simulation results show that compared with the PID control strategy adopted, the proposed ADRC strategy based on GPIO of the CPA can effectively improve the tracking accuracy. © 2024 IEEE.

关键词： Disturbance rejection

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Experimental and Internal Flow Investigation on the Performance of a Hydraulic Retarder with Different Liquid-Filled Amount and Blade Inclination Angles

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Journal of Thermal science 2022年第3期31卷 923-933页

作者： DAI Cui DONG Liang ZHANG Xing ZHU Jiancheng LIN Haibo School of Energy and Power Engineering Jiangsu UniversityZhenjiang212013China Sichuan Provincial Key Lab of Process Equipment and Control Sichuan University of Science&EngineeringZigong643000China Research Center of Fluid Machinery Engineering and Technology Jiangsu UniversityZhenjiang212013China Pipeline Research Design Center PipeChina North Pipeline CompanyLangfang065000China

In order to study the variation of brake torque,vibration,pressure fluctuation,exterior noise and internal flow for a hydraulic retarder with different inclination angles and liquid-filled amount,a bench-scale hydraulic retarder was *** INV3020 data collection system was used for the synchronous acquisition of brake torque,vibration,pressure fluctuation and exterior noise *** were performed with different inclination angles(90°and 75°)and six liquid-filled amount(50 vol%,60 vol%,70 vol%,80 vol%,90vol%and 100 vol%).The torque-volume ratio was proposed to accurately analyze the influence of inclination angle on the liquid volume in stator and rotor and the brake *** multiphase flow model was employed to capture the volume and velocity *** research shows that the brake performance improves and the vibration increases with the decrease of inclination angle and the increase of liquid-filled *** pressure fluctuation increases as the liquid-filled amount increases,while the lower inclination angle effectively lowers the pressure fluctuation *** sound pressure level trends upward with increasing liquid-filled amount,and the lower inclination angle can effectively reduce the *** volume distribution of the liquid phase under different liquid-filled amount is basically *** lower inclination angle can induce more vortexes.

关键词： hydraulic retarder blade inclination angle liquid-filled amount brake torque vibration pressure fluctuation noise numerical calculation

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Stochastic Analysis of Cyber Threats in Information Systems

Stochastic Analysis of Cyber Threats in Information Systems

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2024 Wave Electronics and its Application in Information and Telecommunication Systems, WECONF 2024

作者： Sukhoplyuev, D.I. Nazarov, A.N. Institute Of Information Technology Mirea Russian Technology University Moscow Russia Federal Research Center Computer Science And Control Of Russian Academy Of Sciences Moscow Russia

ISBN: (纸本)9798350364989

This research delves into stochastic methods for density estimation, focusing on techniques such as kernel density estimation (KDE), jittering, and handling multimodality. It aims to leverage these methods to detect cyber threats based on the density distributions of system queries. KDE provides a nonparametric approach to estimating the probability density function of a random variable, allowing for flexible modeling of complex data patterns. Jittering introduces controlled randomness into data points, enhancing the robustness of density estimation against overfitting and improving generalization performance. Moreover, addressing multimodality is crucial for accurately capturing diverse behaviors within the query distributions, which is essential for cyber threat detection in heterogeneous environments. By combining these stochastic methods, this study seeks to enhance the reliability and efficiency of cyber threat detection systems by providing more nuanced insights into the underlying data distributions, thus enabling proactive measures against emerging threats. © 2024 IEEE.

关键词： Probability density function

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A novel protein encoded by porcine circANKRD17 activates the PPAR pathway to regulate intramuscular fat metabolism

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Journal of Animal science and Biotechnology 2025年第03期 1160-1175页

作者： Xiao He Fang Xie Ying Nie Xuefeng Wang Junyi Luo Ting Chen Qianyun Xi Yongliang Zhang Jiajie Sun Guangdong Provincial Key Laboratory of Animal Nutrition Control National Engineering Research Center for Breeding Swine Industry State Key Laboratory of Swine and Poultry Breeding Industry College of Animal Science South China Agricultural University

Background Intramuscular fat is an important factor in evaluating pork quality and varies widely among different pig breeds. However, the regulatory mechanism of circular RNAs(circ RNAs) in lipid metabolism remains largely *** We combined circ RNA-seq and Ribo-seq data to screen a total of 18 circ RNA candidates with coding potential, and circ ANKRD17 was found to be significantly elevated in the longissimus dorsi muscle of Lantang piglets, with a length of 1,844 nucleotides. Using single-cell sequencing, we identified 477 differentially expressed genes in IMF cells between Lantang and Landrace piglets, with enrichment in the PPAR signaling pathway. These genes included FABP4, FABP5, CPT1A, and UBC, consistent with the high levels of acylcarnitines observed in the longissimus dorsi muscles of the Lantang breed, as determined by lipidomic analysis. Further in vitro and in vivo experiments indicated that circ ANKRD17 can regulate lipid metabolism through various mechanisms involving the PPAR pathway, including promoting adipocyte differentiation, fatty acid transport and metabolism, triglyceride synthesis, and lipid droplet formation and maturation. In addition, we discovered that circ ANKRD17 has an open reading frame and can be translated into a novel 571-amino-acid protein that promotes lipid *** Our research provides new insights into the role of protein-coding circ ANKRD17, especially concerning the metabolic characteristics of pig breeds with higher intramuscular fat content.

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Revealing the GHG reduction potential of emerging biomass-based CO_(2) utilization with an iron cycle system

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Frontiers of Environmental science & engineering 2023年第10期17卷 119-131页

作者： Jing Xu Jiong Cheng Runtian He Jiaqi Lu Chunling Wang Heng Zhong Fangming Jin School of Environmental Science and Engineering State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China Innovation Centre for Environment and Resources Shanghai University of Engineering ScienceShanghai 201620China Center of Hydrogen Science Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

CO_(2) utilization becomes a promising solution for reducing anthropogenic greenhouse gas (GHG) emissions. Biomass-based CO_(2) utilization (BCU) even has the potential to generate negative emissions, but the corresponding quantitative evaluation is limited. Herein, the biomass-based CO_(2) utilization with an iron cycle (BCU-Fe) system, which converts CO_(2) into formate by Fe under hydrothermal conditions and recovers Fe with biomass-derived glycerin, was investigated. The GHG reduction potential under various process designs was quantified by a multidisciplinary method, including experiments, simulations, and an ex-ante life-cycle assessment. The results reveal that the BCU-Fe system could bring considerable GHG emission reduction. Significantly, the lowest value is −34.03 kg CO_(2)-eq/kg absorbed CO_(2) (−2.44 kg CO_(2)-eq/kg circulated Fe) with the optimal yield of formate (66%) and Fe (80%). The proposed ex-ante evaluation approach not only reveals the benefits of mitigating climate change by applying the BCU-Fe system, but also serves as a generic tool to guide the industrialization of emerging carbon-neutral technologies.

关键词： Carbon dioxide utilization Hydrothermal reactions Biomass-based CO_(2)reduction Simulation Ex-ante LCA

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Exploring formation mechanism and source attribution of ozone during the 2019 Wuhan Military World Games:Implications for ozone control strategies

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Journal of Environmental sciences 2024年第2期136卷 400-411页

作者： Lei Zhang Lili Wang Runyu Wang Nan Chen Yuan Yang Ke Li Jie Sun Dan Yao Yuesi Wang Minghui Tao Yang Sun Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China University of the Chinese Academy of Sciences Beijing 100049China Hubei Ecological Environment Monitoring Center Station Wuhan 430072China Guizhou Research and Designing Institute of Environmental Sciences Guizhou Academy of Environmental Science and DesignGuiyang 550081China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China School of Environment Key Laboratory for Yellow River and Huai River Water Environment and Pollution ControlMinistry of EducationHenan Normal UniversityXinxiang 453007China Key Laboratory of Regional Ecology and Environmental Change School of Geography and Information EngineeringChina University of GeosciencesWuhan 430074China

A series of emission reduction measures were conducted in Wuhan,Central China,to ensure good air quality during the 7th Military World Games(MWG)in October *** better understand the implications for ozone(O_(3))pollution control strategies,we applied integrated analysis approaches based on the de-weathered statistical model,parameterization methods,chemical box model,and positive matrix factorization *** the MWG,concentrations of O_(3),NO_x,and volatile organic compound(VOCs),OFP(O_(3)formation potential),L_(OH)(OH radical loss rate)were 83μg/m^(3),43μg/m^(3),26 ppbv,188μg/m^(3),and 3.9 s^(-1),respectively,which were 26%,18%,3%,15%,and 13%lower than pre-MWG values and 6%,39%,30%,33%,and 50%lower than post-MWG values,*** removing meteorological influence,O_(3)and its precursors during the MWG decreased largely compared with post-MWG values,and only O_(3),NO_(2),and oxygenated VOCs(OVOCs)declined compared with pre-MWG values,which revealed the emission reduction measures during the MWG played an important role for O_(3)*** six VOCs sources,the mass contributions of biomass burning and solvents usage during the MWG decreased largely compared with pre-MWG values.O_(3)production was sensitive to VOCs and the key species were aromatics,OVOCs,and alkenes,which originated mainly from solvents usage,biomass burning,industrial-related combustion,and vehicle *** O_(3)concentration during the strict control was mainly caused by OVOCs reduction due to biomass burning ***,the O_(3)abatement strategies of Wuhan should be focused on the mitigation of high-reactivity VOCs.

关键词： VOCs Ozone Wuhan Military World Games Source apportionment Relative incremental reactivity Random forest

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Dynamics and diversity of microbial community in salmon slices during refrigerated storage and identification of biogenic amine-producing bacteria

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Food Bioscience 2023年第2期52卷 740-748页

作者： Yingchang Li Nan Zhao Yuanyuan Li Defu Zhang Tong Sun Jianrong Li College of Food Science and Technology Food Safety Key Laboratory of Liaoning ProvinceNational&Local Joint Engineering Research Center for StorageProcessing and Safety Control Technology for Fresh Agricultural and Aquatic ProductsBohai UniversityJinzhou121013LiaoningChina

The changes in microbial composition of salmon slices during storage at 4◦C were measured using high-throughput sequencing(HTS),and biogenic amine(BA)-producing bacteria were isolated from salmon slices to evaluate their ability to produce *** salmon slices had the highest bacterial diversity,which decreased with the extension of the refrigerated storage *** was the dominating genus in fresh salmon slices,followed by Photobacterium and Burkholderia,while Brochothrix became the dominant bacterium in the later stages of the storage *** strains of BA-producing bacteria were isolated and determined,which varied greatly in BA *** these,Brochothrix thermosphacta(B5)exhibited the strongest BA-producing ability,producing 98.32 mg/mL of putrescine and 78.81 mg/mL of cadaverine,and Photobacterium phosphoreum showed a stronger histamine-producing ability(77.07 mg/mL).This study explored the microbial composition in salmon slices and offer insight into the relationship between microorganisms and BAs in salmon *** study provides a theoretical basis for developing antibacterial agents,decreasing the amount BAs,and extending the shelf-life of salmon slices.

关键词： High-throughput sequencing Microbial community Biogenic amine-producing bacteria Biogenic amines Salmon slices

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The Limit Distribution of the Queue Length in a Priority System with Autoregressive Arrivals Under the Heavy Traffic Condition 22nd

The Limit Distribution of the Queue Length in a Priority Sys...

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22nd International Conference on Information Technologies and Mathematical Modelling, ITMM 2023 and 14th International Workshop on Retrial Queues and Related Topics, WRQ 2023

作者： Bergovin, Alexey Ushakov, Vladimir Lomonosov Moscow State University Moscow Russia The Institute of Informatics Problems of the Federal Research Center "Computer Science and Control" of the Russian Academy of Sciences Moscow Russia

ISBN: (纸本)9783031653841

In this paper a one-line queueing system with two priority classes, relative priority, Poissonian input flow with random intensity and infinite number of places in queue for waiting is considered. The current intensity value is taken at the beginning of the time reckoned for the arrival of the next requirement. Successive values of the flow intensity form a Markov chain of a special kind. This input flow structure allows to take in consideration not only mathematical expectation and variance, but also correlation between interval of two next arrivals. The main result is the limit distribution of the queue length for the least priority class, it is obtained in an explicit form. Also, analytical expressions for the density function, mathematical expectation and variance are given. Numerical examples, which show difference among limit distributions (for different parameters) for studied cases are provided. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Markov chains

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Flux Weakening control and Experimental Verification of Hybrid Excitation Field Modulation Synchronous Machine for Direct Drive Propulsion

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Progress In Electromagnetics research C 2024年 140卷 1-9页

作者： Luo, Jiming Zhang, Yang Lu, Enzhao Huang, Quanzhen Huang, Mingming Decker, Duane School of Electrical Information Engineering Henan University of Engineering Zhengzhou451191 China Power Integration and Intelligent Control Center Industrial Software Industry Research Institute Henan University of Engineering Zhengzhou451191 China School of FOCUS Engineering Portland State University P.O. Box 751 Portland United States

With combining the advantages of the hybrid excited machine and field modulation machine, hybrid excitation field modulation machine (HEFMM) exhibits obvious merits of controllable flux operation and independent flux distribution paths, which is one promising candidate for direct drive application fields. As one newly branch of hybrid excitation synchronous machine (HESM), HEFMM control method can be executed based on the characteristics of the machine operating in different speed regions. When it operates in the low-speed constant power region, the minimum copper loss method is used to optimize the d-axis, q-axis, and excitation current values. When it operates in the high-speed constant power characteristic region, flux weakening fuzzy control strategy combined with particle swarm optimization algorithm for HEFMM was presented. The correctness and effectiveness of the proposed flux weakening fuzzy control strategy were verified by the simulation data and experimental results, which demonstrated that the this current optimization method based on PSO algorithm can effectively reduce the total copper loss of the machine by 22.8%, the range of speed regulation with higher efficiency are obtained. © 2024, Electromagnetics Academy. All rights reserved.

关键词： Digital storage

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An Efficient Gait-generating Method for Electrical Quadruped Robot Based on Humanoid Power Planning Approach

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Journal of Bionic engineering 2021年第6期18卷 1463-1474页

作者： Lelai Zhou Tianfa Li Zaiyang Liu Yibin Li School of Control Science and Engineering Center for RoboticsShandong UniversityJinan250061China Engineering Research Center of Intelligent Unmanned System Ministry of EducationJinan250061China

The research field of legged robots has always relied on the bionic robotic research,especially in locomotion regulating approaches,such as foot trajectory planning,body stability regulating and energy efficiency *** energy consumption and keeping the stability of body are considered as two main characteristics of human *** work devotes to develop an energy-efficient gait control method for electrical quadruped robots with the inspiration of human walking *** on the mechanical power distribution trend,an efficient humanoid power redistribution approach is established for the electrical quadruped *** studying the walking behavior acted by mankind,such as the foot trajectory and change of mechanical power,we believe that the proposed controller which includes the bionic foot movement trajectory and humanoid power redistribution method can be implemented on the electrical quadruped robot *** stability and energy efficiency of the proposed controller are tested by the simulation and the single-leg prototype *** results verify that the humanoid power planning approach can improve the energy efficiency of the electrical quadruped robots.

关键词： Bionic robot Mechanical power Bionic trajectory Quadruped robot

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