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| 1 | Simultaneous cooperative relative localization and distributed formation control for multiple UAVs显示文摘Dear editor,In recent years,formation control of multiple unmanned aerial vehicles(UAVs)has been widely studied[1].As a motion control strategy,it aims to realize UAV swarms with many practical applications such as surveillance,rescue and inspection in complex environments,especially in GPSdenied environments.Formation flights have been demonstrated by many researchers,but most still rely on some external positioning systems such as GPS,motion tracking systems,and radio-based positioning systems.However,these infrastructure dependent systems require careful configuration(e.g.,the deployment of anchor nodes)and their operation areas are strictly limited.Moreover,in cluttered urban environments,GPS is unreliable.To get rid of the dependence on external infrastructures,Ref.[2]studied the distancebased formation by using inter-UAV range measurements,but the experiment reported was still GPS dependent. | Kexin GUO Xiuxian LI Lihua XIE | 2020 | Science China(Information Sciences)2020，63，1： | 3 |
| 2 | Distributed multi-robot sweep coverage for a region with unknown workload distribution显示文摘This paper considers the scenario where multiple robots collaboratively cover a region in which the exact distribution of workload is unknown prior to the operation.The workload distribution is not uniform in the region,meaning that the time required to cover a unit area varies at different locations of the region.In our approach,we divide the target region into multiple horizontal stripes,and the robots sweep the current stripe while partitioning the next stripe concurrently.We propose a distributed workload partition algorithm and prove that the operation time on each stripe converges to the minimum under the discrete-time update law.We conduct comprehensive simulation studies and compare our method with the existing methods to verify the theoretical results and the advantage of the proposed method.Flight experiments on mini drones are also conducted to demonstrate the practicality of the proposed algorithm. | Muqing Cao Kun Cao Xiuxian Li Shenghai Yuan Yang Lyu Thien-Minh Nguyen Lihua Xie | 2021 | Autonomous Intelligent Systems2021，1，1： | 1 |
| 3 | Using UAV to Detect Truth for Clean Data Collection in Sensor⁃Cloud Systems显示文摘Mobile edge users(MEUs)collect data from sensor devices and report to cloud systems,which can facilitate numerous applications in sensor‑cloud systems(SCS).However,because there is no effective way to access the ground truth to verify the quality of sensing devices’data or MEUs’reports,malicious sensing devices or MEUs may report false data and cause damage to the platform.It is critical for selecting sensing devices and MEUs to report truthful data.To tackle this challenge,a novel scheme that uses unmanned aerial vehicles(UAV)to detect the truth of sensing devices and MEUs(UAV‑DT)is proposed to construct a clean data collection platform for SCS.In the UAV‑DT scheme,the UAV delivers check codes to sensor devices and requires them to provide routes to the specified destination node.Then,the UAV flies along the path that enables maximal truth detection and collects the information of the sensing devices forwarding data packets to the cloud during this period.The information collected by the UAV will be checked in two aspects to verify the credibility of the sensor devices.The first is to check whether there is an abnormality in the received and sent data packets of the sensing devices and an evaluation of the degree of trust is given;the second is to compare the data packets submitted by the sensing devices to MEUs with the data packets submitted by the MEUs to the platform to verify the credibility of MEUs.Then,based on the verified trust value,an incentive mechanism is proposed to select credible MEUs for data collection,so as to create a clean data collection sensor‑cloud network.The simulation results show that the proposed UAV‑DT scheme can identify the trust of sensing devices and MEUs well.As a result,the proportion of clean data collected is greatly improved. | LI Xiuxian LI Zhetao OUYANG Yan DUAN Haohua XIANG Liyao | 2021 | ZTE Communications2021，19，3： | 1 |
| 4 | Automatic marker-free registration of single tree point-cloud data based on rotating projection显示文摘Point-cloud data acquired using a terrestrial laser scanner play an important role in digital forestry research.Multiple scans are generally used to overcome occlusion effects and obtain complete tree structural information.However,the placement of artificial reflectors in a forest with complex terrain for marker-based registration is time-consuming and difficult.In this study,an automatic coarse-to-fine method for the registration of pointcloud data from multiple scans of a single tree was proposed.In coarse registration,point clouds produced by each scan are projected onto a spherical surface to generate a series of two-dimensional(2D)images,which are used to estimate the initial positions of multiple scans.Corresponding feature-point pairs are then extracted from these series of 2D images.In fine registration,point-cloud data slicing and fitting methods are used to extract corresponding central stem and branch centers for use as tie points to calculate fine transformation parameters.To evaluate the accuracy of registration results,we propose a model of error evaluation via calculating the distances between center points from corresponding branches in adjacent scans.For accurate evaluation,we conducted experiments on two simulated trees and six real-world trees.Average registration errors of the proposed method were 0.026 m around on simulated tree point clouds,and 0.049 m around on real-world tree point clouds. | Xiuxian Xu Pei Wang Xiaozheng Gan Jingqian Sun Yaxin Li Li Zhang Qing Zhang Mei Zhou Yinghui Zhao Xinwei Li | 2022 | Artificial Intelligence in Agriculture2022，，1： | 1 |
| 5 | Norcantharidin enhances ABT-737-induced apoptosis in hepatocellular carcinoma cells by transcriptional repression of Mcl-1显示文摘 | Shuijun Zhang Gongquan Li Xiuxian Ma Yu Wang Guangzhi Liu Liushun Feng Yongfu Zhao Gong Zhang Yang Wu Xuexiang Ye Baoming Qin Jianfeng Lu | 2012 | Cellular Signalling2012，，9： | 1 |
| 6 | Clinical characteristics,risk factors,and prognoses of fungal keratitis caused by three common fungal species in Northern China显示文摘Background:To evaluate the clinical characteristics,risk factors,and treatment outcomes of fungal keratitis(FK)caused by three common fungal species in northern China.Methods:A total of 203 cases of FK caused by Fusarium,Aspergillus or Alternaria treated at Shandong Eye Institute were included.Clinical features were analyzed in the following aspects:(I)risk factors,including physical trauma,ocular surface diseases,contact lens wear,and non-identified risk factors;(II)clinical manifestations;(III)treatment approaches and prognosis.Results:There were 151 cases of Fusarium keratitis,35 cases of Aspergillus keratitis,and 17 cases of Alternaria keratitis.Trauma(71.9%)ranked first among the risk factors for all 3 kinds of FK(P=0.015).Plant matter was most common in FK caused by Fusarium(54.1%)and Alternaria(63.6%),while grit was predominant in Aspergillus keratitis(61.5%).The main clinical manifestations were pseudopodia(74.2%in Fusarium keratitis and 64.7%in Alternaria keratitis)and hypopyon(51.4%in Aspergillus keratitis).The lesion area was less than 10 mm2 in 64.7%of Alternaria infection and more than 10 mm2 in 60.9%of Fusarium infection.Recurrence was found in Fusarium(9.9%)and Aspergillus(5.7%)keratitis,but not in Alternaria keratitis.Conclusions:FK associated with Fusarium,Aspergillus,and Alternaria seems to have various risk factors,clinical characteristics,and prognoses.Awareness of the specific differences may help to guide the clinical treatment before the results of culture and susceptibility testing are available. | Xiuxian Wang Suxia Li Yanni Jia Xiaolin Qi Weiyun Shi Hua Gao | 2020 | Annals of Eye Science2020，，4： | 0 |
| 7 | Investigation on the efficiency of a silicone antifouling coating in controlling the adhesion and germination of Ulva prolifera micro-propagules on rafts显示文摘Prevention of annual'green tides'caused by blooms of the green macroalga Ulva prolifera,which have occurred in the Yellow Sea since 2007,has received much attention.Increasing evidence indicates that micro-propagules on the rafts used for Porphyra yezoensis aquaculture along the coastline of Jiangsu Province in China,were the primary source of these green tides.In this study,we investigated the effectiveness of a silicone antifouling coating for preventing the adhesion and germination of U.prolifera micro-propagules on bamboo and nylon ropes,which have been used in rafts for P.yezoensis aquaculture.Our results demonstrated that a coating of silicone(Sylgard 184)containing 1.0 wt.%sodium benzoate(NaB)could reduce the adhesion rate to<5%and completely inhibited the growth of U.prolifera propagules on the coated surfaces.Coating bamboo and nylon ropes with NaB-incorporated silicone thus proved a potentially effective method for controlling the initial biomass accumulation of U.prolifera. | LI Jing SUN Lei YU ZhiMing SONG XiuXian | 2017 | Science China Earth Sciences2017，60，2： | 0 |
| 8 | A Survey on Noncooperative Games and Distributed Nash Equilibrium Seeking over Multi-Agent Networks显示文摘The work gives a review on the distributed Nash equilibrium seeking of noncooperative games in multi-agent networks,which emerges as one of the frontier research topics in the area of systems and control community.Firstly,we give the basic formulation and analysis of noncooperative games with continuous action spaces,and provide the motivation and basic setting for distributed Nash equilibrium seeking.Then we introduce both the gradient-based algorithms and best-response based algorithms for various type of games,including zero-sum games,aggregative games,potential games,monotone games,and multi-cluster games.In addition,we provide some applications of noncooperative games. | Peng Yi Jinlong Lei Xiuxian Li Shu Liang Min Meng Jie Chen | 2022 | CAAI Artificial Intelligence Research2022，1，1： | 0 |
| 9 | Flocculation of Ulva microscopic propagules using modified clay:a mesocosm experiment显示文摘Microscopic propagules of Ulva species(UMPs)spread on Subei Shoal are believed to play a significant role in the formation of the Yellow Sea green tide.Previous laboratory and ship-based studies indicated that modified clay(MC)can effectively remove UMPs from the water column and restrict their germination.To evaluate the effectiveness of this method under natural conditions,a mesocosm experiment was conducted on the Zhugensha sandbank on Subei Shoal.The results show that the suspended particles on the sandbank would partially disturb the flocculation process between the MC and UMPs.However,the MC at a proper dose could effectively remove UMPs from the water column and decrease the adhesion and germination of UMPs on the nylon ropes that comprised the mariculture rafts by>75%.This method was proven a potential strategy to restrict the initial biomass accumulation of green algae on Subei Shoal.However,field trials in larger time-space scales are still needed to assess the efficiency of this method when used in the open sea. | LI Jing SONG Xiuxian FAN Xin YU Zhiming | 2020 | Journal of Oceanology and Limnology2020，38，4： | 0 |
| 10 | Recent advances on distributed online optimization显示文摘Online optimization has received numerous attention in recent two decades,mostly inspired by its potential applica-tions to auctions,smart grids,portfolio management,dic-tionary learning,neural networks,and so on[1-4].Gener-ally,online optimization is a sequence of decision making processes,where a sequence of time-varying loss functions are gradually revealed in a dynamic environment which may be adversarial.At each time instant. | Xiuxian Li | 2021 | Control Theory and Technology2021，19，1： | 0 |
| 11 | Nearly 100% exciton utilization in highly efficient red OLEDs based on dibenzothioxanthone acceptor显示文摘Improving the utilization of excitons has always been an important topic for the development of electroluminescence devices.In this work,we designed and synthesized three red TADF emitters TPA-DBT12,TPA-DBT3 and DTPA-DBT by employing dibenzothioxanthone(DBT)acceptor framework to stabilize the locally excited triplet state to participate in the reverse intersystem crossing(RISC)process.The fast RISC process and singlet radiation decay process gave rise to evidently enhanced exciton utilization.All of the red OLEDs based on these materials showed maximum EQE over 11% and high exciton utilization close to 100%.This work not only extend the acceptor framework for red materials but also provide a new perspective for the design of highly efficient red TADF materials with 100% exciton utilization by managing locally excited triplet state. | Xiaoxiao Hu Yuanyuan Qin Zhiyi Li Honglei Gao Teng Gao Guanhao Liu Xiangyu Dong Naxi Tian Xiuxian Gu Chun-Sing Lee Pengfei Wang Ying Wang | 2022 | Chinese Chemical Letters2022，33，10： | 0 |
| 12 | Robust flocking for non-identical second-order nonlinear multi-agent systems显示文摘This paper investigates the robust flocking problem for second-order nonlinear systems with a leader and external disturbances.In contrast with most of second-order systems in the literature,the intrinsic dynamics here are nonlinear and non-identical that depend not only on the velocity but also on the position,which is more realistic.Moreover,the interaction topology is undirected and switching.Provided that the leader’s velocity may be constant or time-varying,two distributed flocking control laws have been proposed for two cases to make the differences of the velocities between all followers and the leader approach to zero asymptotically.The proposed distributed flocking control laws are both model-independent which results in the effectiveness of the controllers to cope with the different intrinsic dynamics of the followers and the leader under some assumptions on boundedness of several states.An example is given to illustrate the validity of the theoretical results. | Xiuxian Li Housheng Su Li Li | 2021 | Autonomous Intelligent Systems2021，1，1： | 0 |
| 13 | A survey of decision making in adversarial games显示文摘In many practical applications,such as poker,chess,drug interdiction,cybersecurity,and national defense,players often have adversarial stances,i.e.,the selfish actions of each player inevitably or intentionally inflict loss or wreak havoc on other players.Therefore,adversarial games are important in realworld applications.However,only special adversarial games,such as Bayesian games,are reviewed in the literature.In this respect,this study aims to provide a systematic survey of three main game models widely employed in adversarial games,i.e.,zero-sum normal-form and extensive-form games,Stackelberg(security)games,and zero-sum differential games,from an array of perspectives,including basic knowledge of game models,(approximate)equilibrium concepts,problem classifications,research frontiers,(approximate)optimal strategy-seeking techniques,prevailing algorithms,and practical applications.Finally,promising future research directions are also discussed for relevant adversarial games. | Xiuxian LI Min MENG Yiguang HONG Jie CHEN | 2024 | Science China(Information Sciences)2024，67，4： | 0 |
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