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| 1 | Coordinated flight control of miniature fixed-wing UAV swarms: methods and experiments显示文摘In this paper,we present our recent advances in both theoretical methods and field experiments for the coordinated control of miniature fixed-wing unmanned aerial vehicle(UAV)swarms.We propose a multi-layered group-based architecture,which is modularized,mission-oriented,and can implement large-scale swarms.To accomplish the desired coordinated formation flight,we present a novel distributed coordinated-control scheme comprising a consensus-based circling rendezvous,a coordinated path-following control for the leader UAVs,and a leader-follower coordinated control for the follower UAVs.The current framework embeds a formation pattern reconfiguration technique.Moreover,we discuss two security solutions(inter-UAV collision avoidance and obstacle avoidance)in the swarm flight problem.The effectiveness of the proposed coordinated control methods was demonstrated in field experiments by deploying up to 21 fixed-wing UAVs. | Xiangke WANG Lincheng SHEN Zhihong LIU Shulong ZHAO Yirui CONG Zhongkui LI Shengde JIA Hao CHEN Yangguan YU Yuan CHANG Yajing WANG | 2019 | Science China(Information Sciences)2019，62，11： | 21 |
| 2 | Experimental study of water curtain performance for gas storage in an underground cavern显示文摘An artificial water curtain system is composed of a network of underground galleries and horizontal boreholes drilled from these galleries.Pre-grouting measures are introduced to keep the bedrock saturated all the time.This system is deployed over an artificial or natural underground cavern used for the storage of gas(or some other fluids) to prevent the gas from escaping through leakage paths in the rock mass.An experimental physical modeling system has been constructed to evaluate the performance of artificial water curtain systems under various conditions.These conditions include different spacings of caverns and cavern radii located below the natural groundwater level.The principles of the experiment,devices,design of the physical model,calculation of gas leakage,and evaluation of the critical gas pressure are presented in this paper.Experimental result shows that gas leakage is strongly affected by the spacing of water curtain boreholes,the critical gas pressure,and the number and proximity of storage caverns.The hydraulic connection between boreholes is observed to vary with depth or location,which suggests that the distribution of water-conducting joint sets along the boreholes is also variable.When designing the drainage system for a cavern,drainage holes should be orientated to maximize the frequency at which they encounter major joint sets and permeable intervals studying in order to maintain the seal on the cavern through water pressure.Our experimental results provide a significant contribution to the theoretical controls on water curtains,and they can be used to guide the design and construction of practical storage caverns. | Zhongkui Li Kezhong Wang Anmin Wang Hui Liu | 2009 | Journal of Rock Mechanics and Geotechnical Engineering2009，1，1： | 13 |
| 3 | Simultaneous attack of a stationary target using multiple missiles: a consensus-based approach显示文摘This paper considers the simultaneous attack problem of multiple missiles against a stationary target. Built upon the classic proportional navigation structure, we propose a consensus-based approach to design the cooperative guidance law. Specifically, we present time-varying navigation ratios for the missiles,which exchange the time-to-go estimates between neighboring missiles via a communication network. For the cases where the communication topology is undirected or in the leader–follower structure with a missile acting as the leader whose navigation ratio cannot be tuned, we show that the proposed cooperative guidance law can solve the simultaneous attack problem. The effectiveness of the theoretical results is finally illustrated by numerical simulations. | Jialing ZHOU Jianying YANG Zhongkui LI | 2017 | Science China(Information Sciences)2017，60，7： | 8 |
| 4 | Cooperative Guidance Law Design for Simultaneous Attack with Multiple Missiles Against a Maneuvering Target显示文摘这份报纸对一个调遣的目标考虑多重导弹的同时的攻击问题。与大多数同时的攻击问题在被提出的存在文学不同当导弹 time-to-go 的一个一致问题估计,这份报纸作为导弹 ranges-to-go 的一致问题提出它。基于这策略,新奇分布式的指导法律被建议与未知可操作性的目标解决同时的攻击问题。适应控制方法被介绍估计目标加速的上面的界限。建议指导法律的有效性理论上并且数字地被验证。 | ZHOU Jialing Lü Yuezu LI Zhongkui YANG Jianying | 2018 | Journal of Systems Science & Complexity2018，31，1： | 8 |
| 5 | Distributed adaptive attitude synchronization of multiple spacecraft显示文摘This paper addresses the distributed attitude synchronization problem of multiple spacecraft with unknown inertia matrices. Two distributed adaptive controllers are proposed for the cases with and without a virtual leader to which a time-varying reference attitude is assigned. The first controller achieves attitude synchronization for a group of spacecraft with a leaderless communication topology having a directed spanning tree. The second controller guarantees that all spacecraft track the reference attitude if the virtual leader has a directed path to all other spacecraft. Simulation examples are presented to illustrate the effectiveness of the results. | LI ZhongKui DUAN ZhiSheng | 2011 | Science China(Technological Sciences)2011，54，8： | 6 |
| 6 | Event-triggered encirclement control of multi-agent systems with bearing rigidity显示文摘In recent years, the problem of multi-agent encirclement has attained much attention and was extensively studied. However, few work consider the factor that the on-board calculation as well as the communication capacity in the multi-agent system is limited. We investigate the encirclement control by employing the newly developed bearing rigidity theory and event-triggered mechanism. Firstly, in order to reduce the onboard loads,the event-triggered mechanism is considered in the framework and further an event-triggered control law based on bearing rigidity is proposed. The input-to-state stability(ISS) of networked agents is also analyzed by using the Lyapunov method and the cyclic-small-gain theory. In addition, the lower bound for the inter-event times is provided. Finally, to verify the efficiency and feasibility of the proposed encirclement control law, numerical experiments are investigated. | Yangguang YU Zhiwen ZENG Zhongkui LI Xiangke WANG Lincheng SHEN | 2017 | Science China(Information Sciences)2017，60，11： | 6 |
| 7 | Design and operation problems related to water curtain system forunderground water-sealed oil storage caverns显示文摘The underground water-sealed storage technique is critically important and generally accepted for the national energy strategy in China.Although several small underground water-sealed oil storage caverns have been built in China since the 1970 s,there is still a lack of experience for large-volume underground storage in complicated geological conditions.The current design concept of water curtain system and the technical instruction for system operation have limitations in maintaining the stability of surrounding rock mass during the construction of the main storage caverns,as well as the long-term stability.Although several large-scale underground oil storage projects are under construction at present in China,the design concepts and construction methods,especially for the water curtain system,are mainly based on the ideal porosity medium flow theory and the experiences gained from the similar projects overseas.The storage projects currently constructed in China have the specific features such as huge scale,large depth,multiple-level arrangement,high seepage pressure,complicated geological conditions,and high in situ stresses,which are the challenging issues for the stability of the storage caverns.Based on years' experiences obtained from the first large-scale(millions of cubic meters) underground water-sealed oil storage project in China,some design and operation problems related to water curtain system during project construction are discussed.The drawbacks and merits of the water curtain system are also presented.As an example,the conventional concept of 'filling joints with water' is widely used in many cases,as a basic concept for the design of the water curtain system,but it is immature.In this paper,the advantages and disadvantages of the conventional concept are pointed out,with respect to the long-term stability as well as the safety of construction of storage caverns.Finally,new concepts and principles for design and construction of the underground water-sealed oil storage caverns are proposed. | Zhongkui Li Baoqi Lu Jing Zou Bin Xu Zhizeng Zhang | 2016 | Journal of Rock Mechanics and Geotechnical Engineering2016，8，5： | 4 |
| 8 | H_∞ CONTROL OF NETWORKED MULTI-AGENT SYSTEMS显示文摘这篇论文使在一组自治代理人题目的协作控制产生到外部骚乱的骚乱拒绝问题担心。代理人网络被说拥有骚乱拒绝的需要的水平,如果它到控制输出的从骚乱的转移函数矩阵的 H ∞ 标准是令人满意地小的。未受指导的图被用来在代理人之中代表信息流动拓扑学。一个代理人网络的骚乱拒绝问题能被分析其尺寸等于一个单个节点的一套独立系统的 H ∞ 控制问题解决,这被显示出。有趣的结果是经由在代理人之间的仅仅相对的大小的反馈联合的整个代理人网络的骚乱拒绝能力决不会比一个孤立的代理人的好。改进这,本地反馈注射在网络被用于代理人的小部分。为可能的表演改进的一些标准以线性矩阵不平等被导出。最后,对盒子的扩展通讯时间延期什么时候存在,也被讨论。 | Zhongkui LI Zhisheng DUAN Lin HUANG | 2009 | Journal of Systems Science & Complexity2009，22，1： | 3 |
| 9 | Cost-Benefit Analysis on Forest Certification for Forest Management and Forestry Industry Development in China显示文摘The paper is based on the summarization of forest certification development to analyze and describe how forest certification promotes and pushes the setup of forest resources management model, forest management level and collective forest tenure reform. In terms of breaking green trade barrier, upgrading international competitiveness of forest products, facilitating forestry enterprise growth, etc, it elaborated the role of forest certification in promoting forestry industry development. The authors also made an objective analysis on the costs and risks that China has to bear for conducting forest certification. Based on the comprehensive analysis on benefits and costs, the authors presented the specific recommendations on how China would conduct forest certification. | ZHAO Jie LI Zhongkui HU Yanjie Research Institute of Forestry Policy and Information, Chinese Academy of Forestry, Beijing 100091, P. R. China | 2010 | Chinese Forestry Science and Technology2010，9，4： | 3 |
| 10 | The starch grafted poly( l -lactide) and the physical properties of its blending composites显示文摘 | Li Chen Xueyu Qiu Mingxiao Deng Zhongkui Hong Rui Luo Xuesi Chen Xiabin Jing | 2005 | Polymer2005，，15： | 2 |
| 11 | Effects of V and Zr Additions on Microstructures and Mechanical Properties of Nb-Ti-Al-Base Alloys显示文摘Microstructures and mechanical properties of Nb-32Ti-7Al alloys containing different V and Zr contents were investigated. The microstructures were characterized using optical microscopy and scanning electron microscopy (SEM). The alloy with V and Zr presents single phase Nb solid solution (Nbss). Tensile testing was carried out at room temperature and 1373 K. The results show that these alloys have good ductility at room temperature. The strengths at room and high temperature increase with the addition of V and Zr, but the room temperature ductility decrease. | Bai Run Zheng Xin Li Zhongkui Wang Donghui Xia Mingxing | 2009 | 稀有金属材料与工程2009，38，A03： | 2 |
| 12 | Profiling gene expression patterns of nasopharyngeal carcinoma and normal nasopharynx tissues with cDNA microarray显示文摘5 μg of total RNAs from normal nasopharynx and nasopharyngeal carcinoma tissue have been labeled with α-32P-dCTP during reverse transcription. The synthesized cDNA probes have been hybridized to high-density cDNA microarray containing 5184 genes or expression sequence tags (ESTs). Then image analysis software has been applied to comparing their expression profiles. Results show that 187 ESTs were of density value above 200 in nasopharyngeal carcinoma tissue while there were 307 such ESTs in normal nasopharynx tissue; 38 ESTs were strongly expressed in nasopharynx, but weakly expressed in nasopharyngeal carcinoma; 48 ESTs were strongly expressed in nasopharyngeal carcinoma, but weakly expressed in normal nasopharynx. These results suggest that there may exist some new differentially expressed genes involved in nasopharyngeal carcinoma development. Furthermore, the results strongly indicate that high-density cDNA microarray is a powerful and efficient tool for large-scale screening differentially | Zhiwei He Caiping Ren Liangguo Xu Weidong Liu Lu Xie Zhongkui Li Kaitai Yao | 2000 | Chinese Science Bulletin2000，45，9： | 2 |
| 13 | Consensus disturbance rejection control of directed multi-agent networks with extended state observer显示文摘This paper investigates the consensus disturbance rejection problem among multiple high-order agents with directed graphs.Based on disturbance observers,distributed consensus disturbance rejection protocols are constructed in leaderless and leader-follower consensus setups.Different from the previous related papers,the consensus protocols in this paper are developed in a fully distributed fashion,relying on only the state information of each agent and its neighbors.Sufficient conditions are provided to guarantee that the asymptotic stability of high-order multi-agent systems can be reached with matched disturbances. | Shaopan GUO Zhongkui LI Yifeng NIU Lizhen WU | 2020 | Chinese Journal of Aeronautics2020，33，5： | 1 |
| 14 | An efficient method for the alkylation of α-methylnaphthalene with various alkylating agents using methanesulfonic acid as novel catalysts and solvents显示文摘 | Zhao Zhongkui Li Zongshi Qiao Weihong | 2005 | Catalysis letters2005，102，34： | 1 |
| 15 | Interfacial Tension Between Crude Oil and Decylmethylnaphthalene Sulfonate Surfactant Alkali-free Flooding Systems显示文摘 | Zhao Zhongkui Bi Chenguang Li Zongshi | 2006 | Colloids Surf A2006，276，13： | 1 |
| 16 | Sustainahility of the south China tiger: Implications of inbreeding depression and introgression显示文摘 | Xu Yanchun Fang Shengguo Li Zhongkui | 2007 | Conservation Genetics2007，8，5： | 1 |
| 17 | Stability analysis of block in the surrounding rock mass of a large underground excavation显示文摘 | Jun Liu Zhongkui Li Zhuoyuan Zhang | 2004 | Tunnelling and Underground Space Technology2004，19，2004： | 1 |
| 18 | Identification of an autoregulatory feedback pathway involving interleukinlalpha in induction of constitutive NF-kappaB activation in pancreatic cancer cells显示文摘 | NIU Jiangong LI Zhongkui PENG Bailu | 2004 | J Biol Chem2004，279，16： | 1 |
| 19 | Runoff characteristics of artificial catchment materials for rainwater harvesting in the semiarid regions of China显示文摘 | Li Xiaoyan Xie Zhongkui Yan Xiangkui | 2004 | Agricultural Water Management2004，，65： | 1 |
| 20 | Effect of thinning intensity on the stem CO_(2) efflux of Larix principis-rupprechtii Mayr显示文摘Background:Stem CO_(2) efflux(E_(S))plays a critical role in the carbon budget of forest ecosystems.Thinning is a core practice for sustainable management of plantations.It is therefore necessary and urgent to study the effect and mechanism of thinning intensity(TI)on E_(S).Methods:In this study,five TIs were applied in Larix principis-rupprechtii Mayr 21-,25-,and 41-year-old stands in North China in 2010.Portable infrared gas analyzer(Li-8100 A)was used to measure ES and its association with environmental factors at monthly intervals from May to October in 2013 to 2015.In addition,nutrients,wood structure and nonstructural carbon(NSC)data were measured in August 2016.Results:The results show that ES increased with increasing TI.The maximum ES values occurred at a TI of 35%(3.29,4.57 and 2.98μmol·m^(-2)·s^(-1))and were 1.54-,1.94-and 2.89-fold greater than the minimum E_(S) value in the CK stands(2.14,2.35 and 1.03μmol·m^(-2)·s^(-1))in July for the 21-,25-and 41-year-old forests,respectively.The E_(S) of the trees in low-density stands was more sensitive to temperature than that of the trees in high-density stands.Soluble sugars(SS)and temperature are the main factors affecting ES.When the stand density is low enough as 41-year-old L.principis-rupprechtii forests with TI 35%,bark thickness(BT)and humidity should be considered in addition to air temperature(T_(a)),wood temperature(T_(w)),sapwood width(SW),nitrogen concentration(N)and SS in the evaluation of ES.If a change in stand density is ignored,the CO_(2) released from individual 21-,25-and 41-year-old trees could be underestimated by 168.89%,101.94% and 200.49%,respectively.CO_(2) release was estimated based on the stem equation in combination with the factors influencing ES for reference.Conclusions:We suggest that it is not sufficient to conventional models which quantify ES only by temperature and that incorporating the associated drivers(e.g.density,SS,SW and N)based on stand density into conventional models can improve the accuracy of ES estimates. | Kuangji Zhao Timothy J.Fahey Xiangzhen Wang Jie Wang Fang He Chuan Fan Zhongkui Jia Xianwei Li | 2021 | Forest Ecosystems2021，8，4： | 1 |
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