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Distributed Cooperative Control Algorithm for Multi-UAV Mission Rendezvous

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Transactions of Nanjing University of Aeronautics and Astronautics 2017年第6期34卷 617-626页

作者： Liu Guoliang xing dongjing Hou Jianyong Jin Guting Zhen Ziyang Science and Technology on Avionics Integration Laboratory Shanghai 200233P.R.China College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China China National Aeronautical Radio Electronics Research Institute Shanghai 200233P.R.China

Multiple unmanned aerial vehicles(UAVs)cooperative operation is the main form for UAVs fighting in battlefield,and multi-UAV mission rendezvous is the premise of cooperative reconnaissance and attack *** propose a rendezvous control strategy,which divides the rendezvous process into two parts:The loose formation rendezvous and the close formation *** the first stage,UAVs are supposed to reach the specific target locations simultaneously and form a loose formation.A distributed control strategy based on first-order consensus algorithm is presented to achieve this *** the second stage is designed based on the second-order consensus algorithm to complete the transition from the loose formation to the close *** process needs the speeds and heading angles of UAVs to reach an ***,control algorithms with a virtual leader are proposed,by which the formation states can reach a specific ***,simulation results show that the control algorithms are capable of realizing the mission rendezvous of multi-UAV and the consistence of UAVs′final states,which verify the effectiveness and feasibility of the designed control strategy.

关键词： unmanned aerial vehicles loose formation rendezvous close formation rendezvous consensus algorithm cooperative control

A l15-W Ytterbium-Doped Fibre Laser

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Chinese Physics Letters 2004年第6期21卷 1083-1085页

作者： ZHOUJun LOUQi-Hong KONGLing-Feng WUZhong-Lin XUEDong dongjing-xing WEIYun-Rong YEZhen-Huan ZHUJian-Qiang WANGZhi-Jiang ShanghaiInstituteofOpticsandFineMechanics ChineseAcademyofSciencesShanghai201800

Highly degradable chitosan-montmorillonite (MMT) nanocomposite hydrogel for controlled fertilizer release

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Frontiers of Environmental Science & Engineering 2023年第5期17卷 1-11页

作者： Zeou Dou Maria Vitoria Bini Farias Wensi Chen dongjing He Yuhang Hu xing Xie School of Civil and Environmental Engineering Georgia Institute of TechnologyAtlantaGA 30332USA George W.Woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlantaGA 30332USA School of Chemical and Biomolecular Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

Fertilizer consumption is increasing drastically along with the rapid expansion of farming in response to the ever-growing population. However, a significant portion of the nutrients in traditional fertilizers is lost during leaching and runoff causing economic loss and environmental threats. Polymer-modified controlled-release fertilizers provide an opportunity for mitigating adverse environmental effects and increasing the profitability of crop production. Here, we present a cheap and easy-to-fabricate controlled-release fertilizer excipient based on hydrogels scaffolded by safe and biodegradable chitosan and montmorillonite (MMT) nanoclays. By introducing elastic and flexible physical crosslinking induced by 2-dimensional (2D) MMT nanoflakes into the chitosan hydrogel, highly swellable and degradable chitosan-MMT nanocomposites were fabricated. The addition of MMT into the chitosan hydrogels enhanced the total release of phosphorous (P) and potassium (K), from 22.0 % to 94.9 % and 9.6% to 31.4 %, respectively, compared to the pure chitosan gel. The chitosan-MMT nanocomposite hydrogel achieved a well-controlled overall fertilizer release in soil. A total of 55.3 % of loaded fertilizer was released over 15 d with a daily release of 2.8 %. For the traditional fertilizer podwer, 89.2 % of the fertilizer was washed out during the first irrigation under the same setup. In the meantime, the nanocomposites improved the water retention of the soil, thanks to its excellent water absorbency. Moreover, the chitosan-MMT nanocomposite hydrogels exhibited high degradation of 57 % after swelling in water for 20 d. Such highly degradable fertilizer excipient poses minimal threat to the long-term fertility of the soil. The engineered Chitosan-MMT biopolymer scaffold as a controlled-release fertilizer excipient provides a promising opportunity for advancing sustainable agriculture.

关键词： Biopolymer Hydrogel Controlled-release fertilizer Nanoclay Nanocomposite

Thermal History of Cambrian Burgess Shale-Type Deposits:New Insights from the Early Cambrian Chengjiang and Qingjiang Fossils of South China

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Journal of Earth Science 2024年第4期35卷 1215-1223页

作者： Yuheng Qiao Linhao Cui Guangyuan xing dongjing Fu Chao Chang Robert Gaines xingliang Zhang State Key Laboratory of Continental Dynamics Shaanxi Key laboratory of Early Life and EnvironmentsDepartment of GeologyNorthwest UniversityXi’an710069China Department of Geology Pomona CollegeClaremontCA91711USA

Burgess Shale-type deposits provide a wealth of information on the early evolution of *** that are central to understanding the exceptional preservation of these biotas and the paleoenvironments they inhabited may be obscured by the post-depositional alteration due to metamorphism at depth and weathering near the Earth’s *** over 50 Cambrian BST biotas,the Chengjiang and Qingjiang deposits are well known for their richness of soft-bodied taxa,fidelity of preservation,and Early Cambrian *** alteration via weathering has been well-investigated,the thermal maturity of the units bearing the two biotas has not yet been *** we investigate peak metamorphic temperatures of the two deposits using two independent *** gradient analyses demonstrate that the most fossiliferous sections of the Chengjiang were buried at a maximum depth of∼8500 m in the Early Triassic,corresponding to∼300°C,while the type area of the Qingjiang biota was buried at a maximum depth of∼8700 m in the Early Jurassic,corresponding to∼240°*** geothermometer analyses of fossil carbonaceous material demonstrate that peak temperatures varied across localities with different burial *** two productive sections of the Chengjiang biota were thermally altered at a peak temperature of approximately 300°C,and the main locality of the Qingjiang biota experienced a peak temperature of 238±22°*** results from two independent methods are *** BST deposits for which thermal maturity has been documented,the Qingjiang biota is the least thermally mature,and therefore holds promise for enriching our understanding of BST deposits.

关键词： the Chengjiang Biota the Qingjiang Biota burial history Raman geothermometer thermal history Burgess Shale-type Lagerstätte

Hypermethylation in H3K9me3 regions characterizes the centenarian methylomes in healthy aging

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National Science Review 2023年第6期10卷 60-63页

作者： Fu-Hui Xiao Hao-Tian Wang Xiao-Qiong Chen Ming-Xia Ge dongjing Yan xing-Li Yang Li-Qin Yang Rong Lin Rong-Hui Guo Wen Zhang Nelson Leung-Sang Tang Yonghan He Jumin Zhou Wang-Wei Cai Qing-Peng Kong State Key Laboratory of Genetic Resources and Evolution Key Laboratory of Healthy Aging Research of Yunnan Province Kunming Key Laboratory of Healthy Aging Study Kunming Institute of ZoologyChinese Academy of Sciences KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases Kunming College of Life Science University of Chinese Academy of Sciences Department of Biochemistry and Molecular Biology Hainan Medical College Department of Biology Hainan Medical College Department of Chemical Pathology and Laboratory for Genetics of Disease Susceptibility Li Ka Shing Institute of Health Sciences and School of Biomedical Sciences Faculty of Medicine The Chinese University of Hong Kong Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences Key Laboratory of Healthy Aging Research of Yunnan Province Kunming Institute of Zoology CAS Center for Excellence in Animal Evolution and Genetics Chinese Academy of Sciences

Centenarians,as excellent examples of extreme yet successful aging,not only display a much longer lifespan but can also delay or even escape major agerelated diseases,such as cardiovascular disorders,neurodegenerative diseases,and cancer [1].Studies have suggested that genetic factors account for 20%-30%of human longevity [2];however,only a handful of longevity-associated genes/mutations have been observed in long-lived individuals,even with the use of genome-wide scanning/sequencing assays [3,4].In contrast,evidence has shown the crucial roles of epigenetic alternations in aging and age-related diseases [5],suggesting that epigenetic modifications play central roles in human healthy ***,a comprehensive analysis of the epigenomic landscape of centenarians is urgently needed.

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空间点所属空间体的距离判别法分析

测绘科学 2016年第6期41卷 40-43,112页

作者：相诗尧邢会敏徐东晶中国矿业大学(北京)地球科学与测绘工程学院北京100083

针对空间直角坐标系下空间点所属空间体的判定问题,该文提出一种采用距离判别法进行分析研究的方法。基于空间点的特点以及距离判别法的基本原理,通过建立一种以空间点的x、y、z坐标为判别因子,以马氏距离为判别距离的空间点所属性距离... 详细信息

针对空间直角坐标系下空间点所属空间体的判定问题,该文提出一种采用距离判别法进行分析研究的方法。基于空间点的特点以及距离判别法的基本原理,通过建立一种以空间点的x、y、z坐标为判别因子,以马氏距离为判别距离的空间点所属性距离判别分析模型来完成对该问题的判定,并采用训练样本回代法和总体均值向量假设检验来验正该模型。通过40个训练样本的回代结果和两总体均值向量假设检验结果,证明了该方法的合理性和有效性。运用该模型,对4个待判样本进行判别,判别结果与真实情况一致,同时也证明了该方法的可行性。

关键词：马氏距离距离判别法空间直角坐标系空间点判别因子

Evaluation of Multidisciplinary Collaborative Care in Patients with Acute Coronary Syndrome and Depression and/or Anxiety Disorders

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Cardiovascular Innovations and Applications 2017年第B5期2卷 373-385页

作者： Feng Liang Xiuhua Ma Liuzhuang Zhao Chengwei xing Xin Li dongjing Zhao Da-Yi Hu Shuoqiang Hu Wenbin Wang Lantang Han Shujun Cao Huifang Liu Zhengyu Bian Department of Cardiology Daxing HospitalCapital University of Medical ScienceBeijing 102600China Cardiac Center Beijing People's HospitalBeijing UniversityBeijing 100044China Daxing Community Service Center Daxing DistrictBeijing 102600China Department of Psychiatry Daxing Psychiatric HospitalBeijing 102600China

Objective:To evaluate the effect of multidisciplinary collaborative care(MCC)in patients with both acute coronary syndrome(ACS)and depression and/or anxiety disorders compared with usual physician care(UPC).Methods:Depression and/or anxiety were screened by using SDS and SAS,ACS patients with depression and/or anxiety disorders were randomized into MCC and UPC *** cardiac outcomes and the life quality were evaluated at1year ***:Overall,30.19%(96/318)patients had positive screen ***1year,Cardiac outcome measures for patients in MCC group were significantly better for composite events of cardiac death and non-fatal MI(6.12% vs23.40%,p=0.016),cardiac function(NYHA functional classifi cation III or IV,0% vs 25%,p=0.05),and angina pectoris(21.28% vs 85%,p<0.0005),than patients in UPC group;the life quality were improved in patients in MCC ***:After ACS,30.19% of patients had depression and/or anxiety disorders,MCC had better effects on cardiac outcomes and quality of life in ACS patients with Psychiatric disorders.

关键词： acute coronary syndrome anxiety depression multidisciplinary collaborative care

Correction to: Highly degradable chitosan-montmorillonite (MMT) nanocomposite hydrogel for controlled fertilizer release

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Frontiers of Environmental Science & Engineering 2023年第8期17卷 167-167页

The authors regret that there is an error in Fig.4(a)of the original version of the above ***“GA weight”values in the legend should be *** example,2.3%should be 1.15%.The corrected Fig.4 is *** addition,the“2.3 wt%GA”in the second line of the caption for Fig.2 should be“1.15 wt%GA”.The cause of these errors was that the glutaraldehyde(GA)stock solution we purchased and used to in our experiment was 50 wt%GA in water rather than 100 wt%*** authors would like to apologize for any inconvenience caused.

关键词： Highly release gradable

BP和RBF在断层防水煤柱留设宽度预测中的应用

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煤田地质与勘探 2013年第4期41卷 66-69页

作者：徐东晶施龙青邱梅景行孙祺山东省沉积成矿作用与沉积矿产重点实验室山东青岛266590 山东科技大学地质科学与工程学院山东青岛266590

在总结全国各典型煤矿断层防水煤柱相关资料的基础上,以水头压力、煤层厚度、安全系数、煤的抗张强度为主要影响因子,选择有代表性的样本数据,通过Matlab软件构建了BP和RBF神经网络模型,对各煤矿断层防水煤柱的留设宽度进行了预测,并与... 详细信息

在总结全国各典型煤矿断层防水煤柱相关资料的基础上,以水头压力、煤层厚度、安全系数、煤的抗张强度为主要影响因子,选择有代表性的样本数据,通过Matlab软件构建了BP和RBF神经网络模型,对各煤矿断层防水煤柱的留设宽度进行了预测,并与规程经验公式计算的结果进行了对比。结果显示,在煤矿断层防水煤柱留设宽度预测中,RBF神经网络比BP神经网络的训练速度更快,效率更高,具有更加广阔的应用前景。

关键词： BP神经网络 RBF神经网络煤柱宽度预测断层构造 Matlab软件