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swarming caddisflies in the mid-Cretaceous

National Science Review 2024年第8期11卷 125-135页

作者： Jiajia Wang Michael S.Engel Weiting Zhang Chungkun Shih Rui Qiu Dong Ren College of Life Sciences Capital Normal University Key Laboratory of Zoological Systematics and Evolution Institute of Zoology Chinese Academy of Sciences Division of Invertebrate Zoology American Museum of Natural History Facultad de Ciencias Biológicas Universidad Nacional Mayor de San Marcos Departamento de Entomología Museo de Historia NaturalUniversidad Nacional Mayor de San Marcos Hebei International Joint Research Center for Paleoanthropology Hebei GEO University Department of Paleobiology National Museum of Natural History Smithsonian Institution National Natural History Museum of China

swarming,as a special form of mating aggregation,is most noteworthy in insects of the orders Ephemeroptera,Diptera,and *** in extant trichopterans is well understood in terms of sex composition,specific mating behaviors,and functional morphological specializations of adults,but an exploration of the evolution of such aggregative behaviors is hampered by the dearth of available examples from the fossil record as well as the ability to reliably distinguish the few gatherings as the result of swarming relative to other taphonomic or behavioral *** we describe five new fossil species of caddisflies preserved in mid-Cretaceous amber from Myanmar,all preserved as large *** aggregations of these five new species can be positively identified as swarms based on morphological traits of wing shape,as well as the presence of particular forms of sexual *** of a phylogenetic reconstruction of both molecular and morphological data as well as ancestral-trait reconstructions and tip-dating analyses indicate that swarming was likely present in the Triassic as a feature of the trichopteran *** most Mesozoic insectivorous predators were diurnal based on morphological evidence,largely nocturnal caddisflies would have been freed from such *** phylogeny also shows a correlation between the rise of nocturnal bat predators from the Paleocene or early Eocene and the repeated loss of swarming from various clades of caddisflies,revealing the potential impact of bat predation on reshaping the behavioral landscape of Trichoptera during the Cenozoic.

关键词： swarming caddisflies Cretaceous ancestral-trait reconstructions

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Phenolic compounds affect production of pyocyanin, swarming motility and biofilm formation of Pseudomonas aeruginosa

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Asian Pacific Journal of Tropical Biomedicine 2016年第8期6卷 698-701页

作者： Aylin Ugurlu Aysegul Karahasan Yagci Seyhan Ulusoy Burak Aksu Gulgun Bosgelmez-Tinaz Department of Microbiology School of Medicine Marmara University Department of Biology Faculty of Arts and Sciences Süleyman Demirel University Department of Basic Pharmaceutical Sciences Faculty of Pharmacy Marmara University

Objective: To investigate the effects of plant-derived phenolic compounds(i.e. caffeic acid, cinnamic acid, ferulic acid and vanillic acid) on the production of quorum sensing regulated virulence factors such as pyocyanin, biofilm formation and swarming motility of Pseudomonas aeruginosa(P. aeruginosa) ***: Fourteen clinical P. aeruginosa isolates obtained from urine samples and P. aeruginosa PA01 strain were included in the study. The antibacterial effects of phenolic compounds were screened by well diffusion assay. Pyocyanin and biofilm activity were measured from culture supernatants and the absorbance values were measured using a spectrophotometer. swarming plates supplemented with phenolic acids were point inoculated with P. aeruginosa strains and the ability to swarm was determined by measuring the distance of swarming from the central inoculation ***: Tested phenolic compounds reduced the production of pyocyanin and biofilm formation without affecting growth compared to untreated cultures. Moreover, these compounds blocked about 50% of biofilm production and swarming motility in P. aeruginosa ***: We may suggest that if swarming and consecutive biofilm formation could be inhibited by the natural products as shown in our study, the bacteria could not attach to the surfaces and produce chronic infections. Antimicrobials and natural products could be combined and the dosage of antimicrobials could be reduced to overcome antimicrobial resistance and drug side effects.

关键词： Quorum sensing Phenolic compounds Pseudomonas aeruginosa Biofilm swarming

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Loader and Tester swarming Drones for Cellular PhoneNetwork Loading and Field Test: Non-stochasticParticle Swarm Optimization

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Journal of Autonomous Intelligence 2019年第2期2卷 14-24页

作者： Amir Mirzaeinia Mostafa Hassanalian Mohammad Shekaramiz Mehdi Mirzaeinia Department of Computer Science and Engineering New Mexico Inst.of Mining and Tech.SocorroNMUSA Department of Mechanical and Aerospace Engineering New Mexico Inst.of Mining and Tech.SocorroNMUSA Department of Electrical and Computer Engineering Utah State UniversityLoganUTUSA Department of Electrical Engineering Amirkabir University of TechnologyTehranIran

Cellular network operators have problems to test their network without affecting their user experience. Testingnetwork performance in a loaded situation is a challenge for the network operator because network performance differswhen it has more load on the radio access part. Therefore, in this paper, deploying swarming drones is proposed to loadthe cellular network and scan/test the network performance more realistically. Besides, manual swarming dronenavigation is not efficient enough to detect problematic regions. Hence, particle swarm optimization is proposed to bedeployed on swarming drone to find the regions where there are performance issues. swarming drone communicationshelps to deploy the particle swarm optimization (PSO) method on them. Loading and testing swarm separation help tohave almost non-stochastic received signal level as an objective function. Moreover, there are some situations that morethan one network parameter should be used to find a problematic region in the cellular network. It is also proposed toapply multi-objective PSO to find more multi-parameter network optimization at the same time.

关键词： Particle Swarm Optimization swarming Drone Cellular Network Radio Optimization Loaded Network Test

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基于流函数的多移动机器人swarming控制模型

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机器人 2006年第3期28卷 264-268,274页

作者：卢骏关治洪王华华中科技大学非线性与复杂系统研究中心湖北武汉430074

利用流函数解决单个移动机器人的避障问题,并提出了基于流函数和单一连接规则的、采用虚拟lead-er和二叉树结构的多移动机器人swarm ing控制模型.基于单一连接规则的二叉树结构使得整个机器人群的控制更简单,更灵活;而虚拟leader的引入... 详细信息

利用流函数解决单个移动机器人的避障问题,并提出了基于流函数和单一连接规则的、采用虚拟lead-er和二叉树结构的多移动机器人swarm ing控制模型.基于单一连接规则的二叉树结构使得整个机器人群的控制更简单,更灵活;而虚拟leader的引入,使机器人群在避障过程中不会发生分离,并能够很好地解决类似于机器人掉队的问题,提高了系统的稳定性,增强了系统的应变能力.仿真结果验证了该模型的有效性.

关键词：流函数多移动机器人 swarming 单一连接虚拟leader 二叉树

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Emergent swarming States in Active Particles System with Opposite Anisotropic Interactions

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Chinese Journal of Chemical Physics 2020年第6期33卷 717-726,I0002页

作者： Yong-liang Gou Hui-jun Jiang Zhong-huai Hou Department of Chemical Physics&Hefei National Laboratory for Physical Sciences at the Microscale iChEMUniversity of Science and Technology of ChinaHefei 230026China

From the organization of animal flocks to the emergence of swarming behaviors in bacterial suspension,populations of motile organisms at all scales display coherent collective *** studies showed that the anisotropic interaction between active particles plays a key role in the phase *** we investigate the collective behaviors of based-active Janus particles that experience an anisotropic interaction of which the orientation is opposite to the direction of active force by using Langevin dynamics simulations in two dimensional ***,the system shows emergence of collective swarming states upon increasing the total area fraction of particles,which is not observed in systems without anisotropic interaction or *** threshold for emergence of swarming states decreases as particle activity or interaction strength *** have also performed basic kinetic analysis to reproduce the essential features of the simulation *** results demonstrate that anisotropic interactions at the individual level are sufficient to set homogeneous active particles into stable directed motion.

关键词： Active particle Anisotropic interaction swarming

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Optimization Scheme Based on Differential Equation Model for Animal swarming

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Open Journal of Optimization 2013年第2期2卷 45-51页

作者： Takeshi Uchitane Atsushi Yagi Department of Information and Physical Sciences Osaka University Osaka Japan

This paper is devoted to introducing an optimization algorithm which is devised on a basis of ordinary differential equation model describing the process of animal swarming. By several numerical simulations, the nature of the optimization algorithm is clarified. Especially, if parameters included in the algorithm are suitably set, our scheme can show very good performance even in higher dimensional problems.

关键词： Optimization Scheme Differential Equation Model Animal swarming

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多移动机器人swarming协调控制研究

多移动机器人Swarming协调控制研究

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作者：卢骏华中科技大学

学位级别：硕士

近年来,多移动机器人协调控制问题逐渐成为机器人学中的研究热点。其中,多移动机器人swarming控制更是受到极大关注。这源于自然界中存在着大量的swarm,如昆虫、鸟群、鱼群等。可以预见多移动机器人swarming控制模型的研究成果在军事及... 详细信息

近年来,多移动机器人协调控制问题逐渐成为机器人学中的研究热点。其中,多移动机器人swarming控制更是受到极大关注。这源于自然界中存在着大量的swarm,如昆虫、鸟群、鱼群等。可以预见多移动机器人swarming控制模型的研究成果在军事及民用领域拥有巨大的市场潜力和应用前景。本论文就多移动机器人的swarming控制问题从单移动机器人的控制和移动机器人的群行为两个层次展开研究。首先在单移动机器人层次上,利用流函数解决单个移动机器人的避障问题,避免了人工势场法局部最小的问题。并给出了流线仿真图形,分析讨论了流函数法的一般拓展。其次,在群的层次上,首先讨论了swarm的一种特殊情况:flock。介绍了flock的基本理论,提出了引入虚拟leader的flock的模型并推导出了控制规律,虚拟leader的引入能保证flock群的有序性,并提高了系统的容错能力。然后研究了基于动态连接规则的swarming控制模型。在采用流函数解决单移动机器人避障的基础上,通过借鉴基于动态连接规则的多移动机器人swarming控制,提出了基于单一连接规则的有虚拟leader和二叉树结构的控制模型。基于单一连接规则的二叉树结构使得整个机器人群的控制更简单,更灵活;而虚拟leader的引入,使在避障过程中机器人群不会发生分离,并能够很好的解决类似于机器人掉队的问题,提高了系统的稳定性,增强了系统的应变能力。最后,对上述多移动机器人swarming控制模型进行了仿真实验,并对仿真结果进行了分析,提出了相应的问题。实验结果表明了本论文提出的flock的模型控制规律的正确性和swarm的模型的可行性和有效性。

关键词：多移动机器人流函数 swarming flocking 虚拟leader 单一连接

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Chaotic System Identification Based on a Fuzzy Wiener Model with Particle Swarm Optimization

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Chinese Physics Letters 2010年第9期27卷 46-49页

作者：李勇唐英干 Key Laboratory of Network Control and Intelligent Instrument (Ministry of Education) Chongqing University of Posts and Telecommunications Chongqing 400065 Institute of Electrical Engineering Yanshan University Qinhuangdao 066004

A fuzzy Wiener model is proposed to identify chaotic systems. The proposed fuzzy Wiener model consists of two parts, one is a linear dynamic subsystem and the other is a static nonlinear part, which is represented by the Takagi-Sugeno fuzzy model. Identification of chaotic systems is converted to find optimal parameters of the fuzzy Wiener model by minimizing the state error between the original chaotic system and the fuzzy Wiener model. Particle swarm optimization algorithm, a global optimizer, is used to search the optimal parameter of the fuzzy Wiener model. The proposed method can identify the parameters of the linear part and nonlinear part simultaneously. Numerical simulations for Henon and Lozi chaotic system identification show the effectiveness of the proposed method.

关键词： Models Methods swarming Identification

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A review of jellyfish aggregations, focusing on India’s coastal waters

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Ecological Processes 2020年第1期9卷 689-697页

作者： Sanjiba Kumar Baliarsingh Aneesh Anandrao Lotliker Suchismita Srichandan Alakes Samanta Nimit Kumar T.M.Balakrishnan Nair Indian National Centre for Ocean Information Services Ministry of Earth SciencesGovt.of IndiaHyderabad 500090India

A review of jellyfish aggregations focused on India’s coastal waters was conducted,with the aim to enhance understanding of conducive conditions and subsequent ecological *** swarming,as well as their beach strandings,have been reported from many areas of the world—including India’s coastal waters.A variety of natural(winds,tidal fronts,surface currents,water temperature,salinity,turbidity,dissolved oxygen)and anthropogenic(water quality deterioration,overfishing,translocation,habitat modification)factors play pivotal roles in triggering jellyfish *** aggregation events in the forms of their swarming in coastal waters and beach strandings have resulted in ephemeral nuisances such as water quality deterioration,food chain alterations,hindrance in seawater uptake by power plants,clogging of nets during fishing operations,and tourism *** well-known Indian tourist beaches(e.g.,Puri,Chennai,Goa,and Mumbai)have experienced beach *** recurrence of such events,jellyfishes are relatively less scientifically investigated and monitored in Indian coastal ***,it is important to determine the environmental conditions that trigger jellyfish swarming,in order to develop effective monitoring and prediction *** study additionally proposes a conceptual framework towards development of a jellyfish monitoring system for Indian waters using satellite and model data.

关键词： Jellyfish swarming Coast Water quality Bay of Bengal Arabian Sea

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Natural Hybridization between Rhododendron delavayi and ***(Ericaceae),from Morphological,Molecular and Reproductive Evidence

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Journal of Integrative Plant Biology 2010年第9期52卷 844-851页

作者： Yong-Peng Ma Chang-Qin Zhang Jing-Li Zhang Jun-Bo Yang Kunming Botanic Garden Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China Key Laboratory of Resource Plants and Biotechnology Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China Graduate University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100049 China Tunnan Agricultural University Kunming 650201 China Key Laboratory of Biodiversity and Biogeography Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China

The natural hybridization that occurs between two sympatric species of Rhododendron subgenus Hymenanthes in Yunnan, China, was investigated. In field observations, it was noted that the putative hybrids between R. delavayi Franch. and R. cyanocarpum （Franch.） Franch. ex W.W. Sm. had intermediate morphologies. On the basis of morphology, chloroplast DNA （trnL-rp132） and nuclear DNA （waxy）, hybrids and parental species were identified. Hybridization occurred in both directions, but was asymmetrical, with R. delavayi as the major maternal parent. Reciprocal hand pollination treatments showed that either species, as pollen donor or pollen receiver, could produce fruits. It was noted that fruit set varied among treatments. The same pollinators （bumblebees） were shared in both parental species. From these results, we conclude that individuals with intermediate morphologies are indeed of hybrid origin from natural hybridization between R. cyanocarpum and R. delavayi. Furthermore, we presume the hybridization at the study site could have been initiated by habitat disturbance in the 1950s, and we may hence witness the early stages of hybrid swarm formation.

关键词： Natural hybridization Hybridization Hybrids Species Fruits DNA Fruit swarming Pollen Pollinators

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