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Leader-Follower Consensus of Multi-Agent Systems over Finite Fields via Semi-Tensor Product of Matrices 36

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Leader-Follower Consensus of Multi-Agent Systems over Finite...

第36届中国控制会议

作者： li yalu li Haitao DING Xueying School of Mathematics and Statistics Shandong Normal University

ISBN: (纸本)9781538629185

This paper investigates the leader-follower consensus problem of multi-agent systems with time-delay over finite fields by using the semi-tensor product of ***,the dynamics of leader-follower multi-agent systems with time-delay is converted into an equivalent algebraic ***,based on the algebraic form,a necessary and sufficient condition is presented for the leader-follower consensus problem of multi-agent systems with time-delay over finite ***,based on the analysis of leader-follower multi-agent systems with time-delay,we add a control into system and present a necessary and sufficient condition for the leader-follower consensus problem of multi-agent systems with time-delay over finite fields.

关键词： Leader-Follower Consensus Distributed Control Time-Delay Finite Field Semi-Tensor Product of Matrices

Algebraic encoding scheme for aperture 3 hexagonal discrete global grid system

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Science China Earth Sciences 2018年第2期61卷 215-227页

作者： BEN Jin li yalu ZHOU ChengHu WANG Rui DU lingYu Institute of Surveying and Mapping Information Engineering University State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences College of Earth Science and Surveying Engineering China University of Mining and Technology (Beijing)

Discrete Global Grid Systems(DGGSs) are spatial references that use a hierarchical tessellation of cells to partition and address the entire globe. They provide an organizational structure that permits fast integration between multiple sources of large and variable geospatial data sufficient for visualization and analysis. Despite a significant body of research supporting hexagonal DGGSs as the superior choice, the application thereof has been hindered owing in part to the lack of a rational hierarchy with an efficient addressing system. This paper presents an algebraic model of encoding scheme for the Aperture 3 Hexagonal(A3H) DGGS. Firstly, the definition of a grid cell, which is composed of vertices, edges, and a center, is introduced to describe fundamental elements of grids. Secondly, by identifying the grid cell with its center, this paper proves that cell centers at different levels can be represented exactly using a mixed positional number system in the complex plane through the recursive geometric relationship between two successive levels, which reveals that grid cells are essentially special complex radix numbers. Thirdly, it is shown that through the recursive geometric relationship of successive odd or even levels, the mixed positional number system can also be applied to uniquely represent cell centers at different levels under specific constraint conditions, according to which the encoding scheme is designed. Finally, it is shown that by extending the scheme to 20 triangular faces of the regular icosahedron,multi-resolution grids on closed surfaces of the icosahedron are addressed perfectly. Contrast experiments show that the proposed encoding scheme has the advantages of theoretical rigor and high programming efficiency and that the efficiency of cross-face adjacent cell searching is 242.9 times that of a similar scheme. Moreover, the proposed complex radix number representation is an ideal formalized description tool for grid systems. The research i

关键词： Discrete Global Grid System Hexagon Positional number system Algebraic encoding

Construction of quality evaluation indicator system for diamond discrete global grid systems

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International Journal of Digital Earth 2023年第1期16卷 3637-3660页

作者： Fuli Luo Shupeng Gao Xinpeng Wang Aimei Chen Zheng Wang yalu li College of Civil Engineering Southwest Forestry UniversityKunmingPeople’s Republic of China National Geomatics Center of Chin1 BeijingPeople’s Republic of China College of Civil and Architectural Engineering North China University of Science and TechnologyTangshanPeople’s Republic of China College of Geoscience and Surveying Engineering China University of Mining and Technology(Beijing)BeijingPeople’s Republic of China

Although the uniformity of diamond discrete global grid is essential for calculations and searches,geometric deformations increase with the level of *** Good child Criteria provides a basis for evaluating the quality of the global ***,some indicators in the criteria are redundant and contradictory,and the existing indicator system has *** using the indicator system may render the evaluation of the diamond grid *** this study,we summarized the evaluation indicators for grid quality basedon the Good child Criteria,calculated the correlations between these indicators using different diamond grid systems,and constructed reliable evaluation systems based on similarities and *** selected grid systems are classified into two groups:non-equal-area and equal-area *** quality evaluation systems are composed of Size-Shape-Topology Factor and Geometry-Topology Factor,*** proposed quality evaluation systems utilize a minimal number of indicators selected from each factor to provide a comprehensive description of the diamondgrid’s *** approach simplifies the complexity of the evaluations while improving their reliability and credibility.

关键词： discrete global grid goodchild criteria correlation factor analysis diamond grid

Neuroprotective effect of pretreatment with ganoderma lucidum in cerebral ischemia/reperfusion injury in rat hippocampus

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Neural Regeneration Research 2014年第15期9卷 1446-1452页

作者： Wangxin Zhang Qiuling Zhang Wen Deng yalu li Guoqing Xing Xianjun Shi Yifeng Du Department of Neurology Shandong Provincial HospitalShandong University Department of Medical Psychology Taishan Medical University

Ganoderma lucidum is a traditional Chinese medicine, which has been shown to have both an-tioxidative and anti-inflammatory effects, and noticeably decreases both the infarct area and neuronal apoptosis of the ischemic cortex. This study aimed to investigate the protective effects and mechanisms of pretreatment with ganoderma lucidum （by intragastric administration） in cerebral ischemia/reperfusion injury in rats. Our results showed that pretreatment with ganoderma lucidum for 3 and 7 days reduced neuronal loss in the hippocampus, diminished the content of malondialdehyde in the hippocampus and serum, decreased the levels of tumor necrosis factor-a and interleukin-8 in the hippocampus, and increased the activity of superoxide dismutase in the hippocampus and serum. These results suggest that pretreatment with ganoderma lucidum was protective against cerebral ischemia/reperfusion injury through its anti-oxidative and an-tiinflammatory actions.

关键词： nerve regeneration cerebral ischemia/reperfusion ganoderma lucidum anti-oxidative anti-inflammatory superoxide dismutase malondialdehyde interleukin-8 tumor necrosis factor-a apoptosis hippocampus neural regeneration

Inductive and synergistic interactions between plant allelochemical flavone and Bt toxin Cry1 Ac in Helicoverpa armigera

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Insect Science 2021年第6期28卷 1756-1765页

作者： Shan Wang Min Zhang Jinyong Huang Leyao li Kaiyuan Huang Yuting Zhang yalu li Zhongyuan Deng Xinzhi Ni Xianchun li School of Agricultural Sciences Zhengzhou UniversityZhengzhouChina School of life Sciences Zhengzhou UniversityZhengzhouChina USDA-ARS Crop Genetics and Breeding Research UnitUniversity of Georgia-Tifton CampusTiftonGAUSA Department of Entomology and BI05 Institute University of ArizonaTucsonAZUSA

Genetically engineered crops simultaneously produce defensive allelochemi-cals and Bacillus thuringiensis(Bt)toxin proteins to kill some of the world's most devastating insect *** the two types of toxins,when ingested sequentially or simultaneously,interact at both lethal and sublethal doses in these pests remains ***,we examined the toxicological interactions between the Bt toxin Cry 1 Ac and the flavonoid allelochemical flavone in Helicoverpa *** exposure of *** neonates to lethal doses(LC25)of Cry 1 Ac and flavone caused a mortality significantly higher than that of either toxin alone and their expected additive *** for 24 h to a sublethal dose(LC10)of Cry 1 Ac followed by 6-d simultaneous exposure to the same dose of Cry 1 Ac plus a lethal dose(1.6 mg/g diets,LC50)of flavone resulted in a mortality significantly higher than that of the LC50 dose of flavone alone and the expected additive mortality of the LC50 dose of flavone plus the LC10 dose of Cry 1 ***-day preexposure to the sublethal dose(LC10)of flavone followed by 6-d simultaneous exposure to the LC50 dose(6 ng/cm2)of Cry 1 Ac plus the LC25 dose of flavone yielded a mortality significantly higher than that of the LC50 dose of Cry 1 Ac but similar to the expected additive mortality of the LC50 dose of Cry 1 Ac plus the LC50 dose of *** results suggest that Cry 1 Ac induces and synergizes the toxicity of flavone against *** larvae.

关键词： allelochemicals Bt crops combination toxicity induced toxicity resistance toxicological interactions

Robust Synchronization and Partial Stabilization of Logical Control Networks via Event-Triggered Control

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Robust Synchronization and Partial Stabilization of Logical ...

第37届中国控制会议

作者： li yalu li Haitao DING Xueying School of Mathematics and Statistics Shandong Normal University

This paper proposes an event-triggered control method for the robust synchronization and robust partial stabilization of k-valued logical control networks（KVLCNs）. The main tool is the algebraic state space representation（ASSR） ***, based on ASSR, two necessary and sufficient conditions are presented for the robust synchronization and robust partial stabilization of KVLCNs via state feedback event-triggered control. Secondly, a control design procedure is established to design state feedback event-triggered controllers for the robust synchronization and robust partial stabilization of KVLCNs. Finally, an example is given to show effectiveness of the obtained new results.

关键词： k-valued logical control network Robust synchronization Robust partial stabilization Semi-tensor product of matrices

EFFECT OF INTERMEDIATE PRESSING ON SUPERCONDUCTING PROPERTIES OF Ag—SHEATHED Bi-Pb-Sr-Ca-Cu-O TAPES

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EFFECT OF INTERMEDIATE PRESSING ON SUPERCONDUCTING PROPERTIE...

第三届青年超导会

作者： li yalu li Chengren Northwest Institute for Nonferrous Metal Research Baoji 721014

＜正＞The influence o fan intermediate pressing process on the superconducting properties of Ag-sheathed Bi-Pb-Sr-Ca-Cu-O superconducting tapes has been *** were made by sintering uniaxially pressed tapes af ter the initial *** textured microstructure with （001） reflections was confirmed by X-ray diffraction and *** this intermediate pressing and sintering process,Jc was much increased and the magnetic field dependence of Jc was also *** critical current anisotropy as a function of mag- netic field is also discussed in detail in this paper.

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Study on Methods of Reduce Resistive Voltage Dividers' Phase Shift

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Study on Methods of Reduce Resistive Voltage Dividers' Phase...

Measurement Touch the World——IEEE 2011 10th International Conference on Electronic Measurement & Instruments(ICEMI’2011)

作者： You li li yalu liu Min Jin Haibin Beijing Orient Institute of Measurement&Test(BOIMT)Department 12,Beijing 100086,China

Introduces the factors lead to phase shift of resistive voltage divider and proposes a new methods to reduce it.A chain of capacitors build a vice capacitive divider that not only provides equivalent potential screen but also compensates phase *** study is proceeding in simulation period,and the results indicate that the resistive voltage divider with phase shifts less than 200 rad at 100 kHz will accomplished soon.

关键词： wideband resistive voltage divider phase shift vice capacitive divider

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球面三角格网单元面积的分形计算

武汉大学学报（信息科学版） 2020年第10期45卷 1541-1546,1554页

作者：王政赵学胜罗富丽李亚路孙中昶中国矿业大学(北京)地球科学与测绘工程学院北京100083 中国科学院遥感与数字地球研究所北京100094

球面三角格网是一种多用途的全球离散格网,是数字地球领域空间信息表达的一种有效方案。针对球面三角格网单元面积计算的一般方法准确度不高的问题,提出一种面积计算的分形方法。在同一剖分层中,把球面三角格网重新编码为0或1,计算相同... 详细信息

球面三角格网是一种多用途的全球离散格网,是数字地球领域空间信息表达的一种有效方案。针对球面三角格网单元面积计算的一般方法准确度不高的问题,提出一种面积计算的分形方法。在同一剖分层中,把球面三角格网重新编码为0或1,计算相同编码的格网单元的面积,拟合多重分形的面积计算函数,以此作为球面三角格网的面积计算模型。用相对中误差计算该模型的准确度,并用算例进行验证。结果显示,随着多重分形的次数增加,格网单元的面积计算准确度变高,面积计算准确度是可控的。

关键词：全球离散格网球面三角形分形编码单元面积计算模型