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Projective Group Consensus of Multi-Agent Systems with Arbitrary Parameter

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Journal of Systems Science & Complexity 2021年第2期34卷 618-631页

作者： CHEN Liangkang GUO Liuxiao YANG Yongqing School of Science Jiangnan UniversityWuxi 214122China

In this paper,the projective group consensus issue for second order multi-agent systems(MASs)in directed graphs with a dynamic leader is investigated.The proposed projective group consensus with arbitrary parameter includes traditional consensus,reverse group consensus and cluster consensus as its special cases.Novel distributed control protocols are designed to obtain projective group consensus without analyzing signed directed graph as in most current literatures on bipartite consensus problem.On the basis of Lyapunov stability property,algebraic graph and some necessary matrix theory,sufficient conditions for delay and delay-free cases are derived.Finally,simulations of nonlinear chaotic MASs are adopted to testify the theoretical results.

关键词： Group consensus multi-agent systems subgroups time delay

The molecular mechanism of plasma membrane H^(+)-ATPases in plant responses to abiotic stress

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Journal of Genetics and Genomics 2022年第8期49卷 715-725页

作者： Jing Li Yan Guo yongqing yang Beijing Advanced Innovation Center for Tree Breeding by Molecular Design College of Bioscience and Resources EnvironmentBeijing University of AgricultureBeijing 102206China State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural UniversityBeijing 100193China

Plasma membrane H^(+)-ATPases(PM H^(+)-ATPases)are critical proton pumps that export protons from the cytoplasm to the apoplast.The resulting proton gradient and difference in electrical potential energize various secondary active transport events.PM H^(+)-ATPases play essential roles in plant growth,development,and stress responses.In this review,we focus on recent studies of the mechanism of PM H^(+)-ATPases in response to abiotic stresses in plants,such as salt and high pH,temperature,drought,light,macronutrient deficiency,acidic soil and aluminum stress,as well as heavy metal toxicity.Moreover,we discuss remaining outstanding questions about how PM H^(+)-ATPases contribute to abiotic stress responses.

关键词： PM H^(+)-ATPases Abiotic stress Molecular mechanism

Unraveling salt stress signaling in plants

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Journal of Integrative Plant Biology 2018年第9期60卷 796-804页

作者： yongqing yang Yan Guo State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural UniversityBeijing 100193China

Salt stress is a maior environmental factor limiting plant growth and productivity. A better understanding of the mechanisms mediating salt resistance will help researchers design ways to improve crop performance under adverse environmental conditions. Salt stress can lead to ionic stress, osmotic stress and secondary stresses, particularly oxidative stress, in plants. Therefore, to adapt to salt stress, plants rely on signals and pathways that re-establish cellular ionic, osmotic, and reactive oxygen species （ROS） homeostasis. Over the past two decades, genetic and biochemical analyses have revealed several core stress signaling pathways that participate in salt resistance. The Salt Overly Sensitive signaling pathway plays a key role in maintaining ionic homeostasis, via extruding sodium ions into the apoplast. Mitogenactivated protein kinase cascades mediate ionic, osmotic, and ROS homeostasis. SnRK2 （sucrose nonfermenting l-related protein kinase 2） proteins are involved in maintaining osmotic homeostasis. In this review, we discuss recent progress in identifying the components and pathways involved in the plant＇s response to salt stress and their regulatory mechanisms. We also review progress in identifying sensors involved in salt-induced stress signaling in plants.

关键词： Unraveling salt stress signaling in plants ROS ABA MAPKKK SOS CBL

Observation and analysis of the influence of wind waves on air-sea momentum fluxes

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Science China Earth Sciences 2023年第7期66卷 1547-1555页

作者： Sheng CHEN Yuhuan XUE Baoshan yang yongqing YU Fangli QIAO First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China Key Laboratory of Marine Sciences and Numerical Modeling Ministry of Natural ResourcesQingdao 266061China Key Laboratory of Marine Sciences and Numerical Modeling Shandong ProvinceQingdao 266061China Shengli Oilfield Branch SinopecDongying 257000China

Due to the long-standing lack of understanding the role of wind waves on wind stress at moderate to high wind speeds,a high-frequency turbulence observation system is used in this study to obtain air-sea momentum flux data under pure wind wave conditions based on the tower-based marine meteorological observation platform in the southern Bohai Sea.Moreover,the modulation of wind waves on wind stress under wind speeds greater than 10 m s^(–1)is analyzed.The results indicated that the wind wave states caused by winds from the northwest and northeast are different under the influence of cold air,resulting in different wind stresses and drag coefficients.The wind stress increases with an increasing wind speed,reaching its maximum value when the northwest wind is nearly 20 m s^(–1),while the extreme value of the drag coefficient is basically the same when the northwest wind speed is the maximum and the northeast wind wave significant wave height is the maximum.The drag coefficient increases with an increasing wind speed within the range of 10–15 m s^(–1),reaching saturation at 15 m s^(–1).The critical wind speed is smaller than other observed results.Further analysis showed that wind-induced turbulent stress deviates from the observed values,and the degree of deviation depends on the wind speed and wave state,with a greater deviation caused by strong winds and waves.The wave-induced stress can correct the negative deviation between wind-induced turbulent stress and the observed value,and the drag coefficient calculated based on the modified wind stress tends to be close to the observed value overall.

关键词： Tower-based platform in the Bohai Sea Moderate to high wind speed Pure wind waves Wind stress Wave-induced stress

Petrogenesis and Tectonic Significance of Shenxianshui Alkaline Granite in Gejiu,Yunnan Province,China

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Acta Geologica Sinica(English Edition) 2024年第2期98卷 368-385页

作者： yang Rong CHEN yongqing School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China

The Shenxianshui granites in the western Gejiu area were formed in the Late Cretaceous.Laser ablation inductively coupled plasma mass spectrometry indicates zircon U-Pb ages ranging from 90.67±0.7 to 85.97±0.6 Ma.The intrusive rocks are peraluminous(A/CNK=1.03 to 1.33)and calc-alkaline,showing an affinity towards I-type granite.Large ion lithophilic elements are enriched in K and Rb,while high field strength elements are depleted.Moreover,light rare earth elements are significantly enriched,showing a slight negative Eu anomaly(Eu/Eu^(*)=0.39 to 0.58).Shenxianshui granite has a relatively high initial Sr isotope ratio(^(87)Sr/^(86)Sr)_(i)(0.7098-0.7105),negative ε_(Nd)(t)values(−7.99 to−7.44)and negative ε_(Hf)(t)values(−8.37 to−2.58).Combined with previous studies,these characteristics suggest that the Shenxianshui alkaline granites were formed in a post-collision extensional environment.The alkaline granitic magma possibly originated from the partial melting of the lower crust during the Mesoproterozoic era and may have contained mantle source materials.Shenxianshui alkaline granite was formed from mixed magma with a high degree of crystal differentiation.The abundance of ore-forming elements indicates that Shenxianshui granite has the potential to mineralize key metals and rare earth elements.

关键词： I-type granite zircon U-Pb geochronology Sr-Nd-Pb isotopes Hf isotope Gejiu

Bipartite Consensus of Linear Multi-Agent Systems by Distributed Event-Triggered Control

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Journal of Systems Science & Complexity 2021年第3期34卷 955-974页

作者： yang Ruitian PENG Li YANG Yongqing ZHU Fengzeng Research Center of Engineering Applications for IOT Jiangnan UniversityWuxi 214122China Key Laboratory of Advanced Process Control for Light Industry(Ministry of Education) School of ScienceJiangnan UniversityWuxi 214122China

For multi-agent systems with competitive and collaborative relationships,signed graph can more intuitively express the characteristics of their interactive networks.In this paper,the bipartite consensus is investigated for multi-agent systems with structurally balanced signed graph.In order to reduce actuation burden in dynamical network environment,the event-triggering strategy is applied to bipartite consensus protocol for the multi-agent systems.The triggered condition for each agent is designed by using its own information and transmitted information of its neighbors at sampling instant and make the number of triggers of the whole systems be reduced.Based on the distributed eventtriggered control,some sufficient conditions are derived to guarantee the leaderless and leader-following bipartite consensus.Finally,some numerical examples are shown to demonstrate the effectiveness of the theoretical results.

关键词： Bipartite consensus coopetition networks event-triggered control structurally balanced

Temperature and structural responses of a single-section utility tunnel throughout fire exposure

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Frontiers of Structural and Civil Engineering 2022年第10期16卷 1351-1364页

作者： Yanmin yang Ying XIONG yongqing LI Xiangkun MENG Peng WANG Tianyuan CAI School of Civil Engineering Jilin Jianzhu UniversityChangchun 130118China Institute of Water Conservancy and Planning Research Changchun 130000China

In this study,fire tests of four single-section scaled-down utility tunnels were conducted.By analyzing temperature and structural responses of the utility tunnel throughout the fire exposure,the effects on the fire behavior of two different construction methods,cast-in-situ and prefabricated,and of two different materials,ordinary concrete and full lightweight concrete,were explored.The results of the study showed that the shear failure of the cast-in-situ utility tunnel occurred at the end of the top or bottom plate,and the failure of the prefabricated utility tunnel occurred at the junction of the prefabricated member and post-cast concrete.As the temperature increased,the temperature gradient along the thickness direction of the tunnel became apparent.The maximum temperature difference between the inner and outer wall surfaces was 531.7°C.The highest temperature occurred in the cooling stage after stopping the heating,which provided a reference for the fire protection design and rescue of the utility tunnel.The displacement of the top plate of the prefabricated utility tunnel was 16.8 mm,which was 41.8%larger than that of the cast-in-situ utility tunnel.The bearing capacities of the ordinary concrete utility tunnel and full lightweight concrete utility tunnel after the fire loss were 27%and 16.8%,respectively.The full lightweight concrete utility tunnel exhibited good ductility and fire resistance and high collapse resistance.

关键词： full lightweight concrete construction methods temperature response structural response fire test

Sima Guangrompió la tinaja

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今日中国（西文版） 2017年第3期 58-59页

作者： YANG Yongqing

Flexible electronics manufacturing technology and equipment

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Science China(Technological Sciences) 2022年第9期65卷 1940-1956页

作者： YIN ZhouPing HUANG YongAn yang Hua CHEN JianKui DUAN yongqing CHEN Wei State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Flexible Electronics Research Center Huazhong University of Science and TechnologyWuhan 430074China

Flexible electronics such as mechanically compliant displays,sensors and solar cells,have important applications in the fields of energy,national defence and biomedicine,etc.Various types of flexible electronics have been proposed or developed by the improvements in structural designs,material properties and device integrations.However,the manufacturing of flexible electronics receives little attention,which limits its mass production and industrialization.The increasing demands on the size,functionality,resolution ratio and reliability of flexible electronics bring several significant challenges in their manufacturing processes.This work aims to report the state-of-art technologies and applications of flexible electronics manufacturing.Three key technologies including electrohydrodynamic direct-writing,flip chip and automatic optical inspection are highlighted.The mechanism and developments of these technologies are discussed in detail.Based on these technologies,the present work develops three kinds of manufacturing equipment,i.e.,inkjet printing manufacturing equipment,robotized additive manufacturing equipment,and roll-to-roll manufacturing equipment.The advanced manufacturing processes,equipment and systems for flexible electronics pave the way for applications of new displays,smart sensing skins and epidermal electronics,etc.By reviewing the developments of flexible electronics manufacturing technology and equipment,it can be found that the existing advances greatly promote the applications and commercialization of flexible electronics.Since flexible electronics manufacturing contains many multi-disciplinary problems,the current investigations are confronted with great challenges.Therefore,further developments of the reviewed manufacturing technology and equipment are necessary to break the current limitations of manufacturing resolution,efficiency and reliability.

关键词： flexible electronics micro/nano manufacturing electrohydrodynamic direct-writing flip chip automatic optical inspection