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dragonfly Interaction Algorithm for Optimization of Queuing Delay in Industrial Wireless Networks

Journal of Bionic Engineering 2024年第1期21卷 447-485页

作者： Sanjay Bhardwaj Da-Hye Kim Dong-Seong Kim Department of IT Convergence Engineering ICT Convergence Research CenterKumoh National Institute of TechnologyGumiSouth Korea

In industrial wireless networks,data transmitted from source to destination are highly *** often leads to the queuing of the data,and poor management of the queued data results in excessive delays,increased energy consumption,and packet ***,a nature-inspired-based dragonfly Interaction Optimization Algorithm(DMOA)is proposed for optimization of the queue delay in industrial wireless *** term“interaction”herein used is the characterization of the“flying movement”of the dragonfly towards damselflies(female dragonflies)for *** a result,interaction is represented as the flow of transmitted data packets,or traffic,from the source to the base *** includes each and every feature of dragonfly movement as well as awareness of the rival dragonflies,predators,and damselflies for the desired optimization of the queue *** features are juxtaposed as noise and interference,which are further used in the calculation of industrial wireless metrics:latency,error rate(reliability),throughput,energy efficiency,and fairness for the optimization of the queue *** analysis,convergence analysis,the Wilcoxon test,the Friedman test,and the classical as well as the 2014 IEEE Congress of Evolutionary Computation(CEC)on the benchmark functions are also used for the evaluation of DMOA in terms of its robustness and *** results demonstrate the robustness of the proposed algorithm for both classical and benchmarking functions of the IEEE CEC ***,the accuracy and efficacy of DMOA were demonstrated by means of the convergence rate,Wilcoxon testing,and ***,fairness using Jain’s index in queue delay optimization in terms of throughput and latency,along with computational complexity,is also evaluated and compared with other *** results show that DMOA exceeds other bio-inspired optimization algorithms in terms of fairness in queue delay management and average packet *** proposed a

关键词： dragonfly Damselfly Interaction Queuing delay Optimization Industrial wireless networks

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Influence of Microstructures on Aerodynamic Characteristics for dragonfly Wing in Gliding Flight

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Journal of Bionic Engineering 2019年第3期16卷 423-431页

作者： Sheng Zhang Masayuki Ochiai Yuta Sunami Hiromu Hashimoto Micro/Nano Technology Center Tokai University 4-1-1 Kitakaname Hiratsuka-city Kanagawa 259-1292 Japan Department of Mechanical Engineering Tokai University 4-1-1 Kitakaname Hiratsuka-city Kanagawa 259-1292 Japan

In this paper, the functionalities of microstructures for dragonfly wing during gliding flight are investigated. Three dragonfly-mimic airfoil-shaped wings with hybrid structures were designed and fabricated as: flat wing, zigzag-edged wing and zigzag-edged wing with pillar structure. Based on the wind tunnel experiments, the zigzag-edged wing structure significantly reduces the drag force in the gliding flight. Moreover, the drag reduction is more effective on the combination of the surface pillar and zigzag-edged structure. In addition, the zigzag-edged wing structure has less influence of Karman vortex street, and the surface pillars reduce the frictional drag and stabilized the streamline in the lower vortex region. Overall, the microstructure of the dragonfly wing is an important element in the aerodynamic study. These findings can enhance the knowledge of insect-mimic wing structure and facilitate the application of Micro Air Vehicle (MAV) in the gliding flight.

关键词： dragonfly wing vein structure aerodynamics gliding biomimetics

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Experimental investigation on the wing-wake interaction at the mid stroke in hovering flight of dragonfly

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Science China(Physics,Mechanics & Astronomy) 2012年第11期55卷 2167-2178页

作者： LAI GuoJun SHEN GongXin FFFOM Laboratory School of Aeronautic Science and EngineeringBeihang UniversityBeijing 100191China

This paper focuses on flow structures of the wing-wake interaction between the hind wing and the wake of the forewing in hovering flight of a dragonfly since there are arguments whether the wing-wake interaction is useful or not.A mechanical flapping model with two tandem wings is used to study the *** the device,two identical simplified model wings are mounted to the flapping model and they are both scaled up to keep the Reynolds number similar to those of dragonfly in hovering flight since our experiment is conducted in a water *** kinetic pattern of dragonfly(Aeschna juncea) is chosen because of its special interesting asymmetry.A multi-slice phase-locked stereo particle image velocimetry(PIV) system is used to record flow structures around the hind wing at the mid downstroke(t/T=0.25) and the mid upstroke(t/T=0.75).To make comparison of the flow field between with and without the influence of the wake,flow structures around a single flapping wing(hind wing without the existence of the forewing) at these two stroke phases are also recorded.A local vortex identification scheme called swirling strength is applied to determine the vortices around the wing and they are visualized with the iso-surface of swirling *** paper also presents contour lines of z at each spanwise position of the hind wing,the vortex core position of the leading edge vortex(LEV) of hind wing with respect to the upper surface of hind wing,the circulation of the hind wing LEV at each spanwise position and so *** results show that dimension and strength of the hind wing LEV are impaired at the mid stroke in comparison with the single wing LEV because of the downwash from the *** results also reveal that a wake vortex from the forewing traverses the upper surface of the hind wing at the mid downstroke and its distance to the upper surface is about 40% of the wing chord *** the instant,the distance of the hind wing LEV to the upper surface is abo

关键词： dragonfly hovering flight particle image velocimetry (PIV) flow interaction leading edge vortex

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Nonlinear dynamic analysis of dragonfly-inspired piezoelectric unimorph actuated flapping and twisting wing

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International Journal of Smart and Nano Materials 2012年第2期3卷 103-122页

作者： Sujoy Mukherjee Ranjan Ganguli Department of Aerospace Engineering Indian Institute of ScienceBangalore-560012KarnatakaIndia

The nonlinear equations for coupled elastic flapping-twisting motion of a dragonfly-inspired smart flapping wing are used for a flapping wing actuated from the root by a PZT unimorph in the piezofan *** by the piezoelectric harmonic force generates only the flap bending motion,which,in turn,induces the elastic twist motion due to interaction between flexural and torsional vibration *** unsteady aerodynamic model is used to obtain the aerodynamic *** simulations are performed using a wing whose size is the same as the dragonfly Sympetrum frequens *** is found that the value of average lift reaches its maximum when the smart flapping wing is excited at a frequency closer to the natural frequency in ***,consideration of the elastic twisting of the flapping wing leads to an increase in the lift *** is also found that the flapping wing generates sufficient lift to support its own weight and carry a small ***,the piezoelectrically actuated smart flapping wing based on the geometry of a Sympetrum frequens wing and undergoing flapping-twisting motions can be considered as a potential candidate for use in micro air vehicle applications.

关键词： piezofan nonlinear vibration coupled flapping-twisting dragonfly smart material micro air vehicle

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Phenoloxidase and Melanization Innate Immune Activities in Green Darner dragonfly Nymphs (Anax junius)

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Advances in Biological Chemistry 2022年第4期12卷 130-141页

作者： Mark Merchant Matthew R. McClure Department of Chemistry McNeese State University Lake Charles USA Department of Biology Lamar State College Orange Orange USA

Insects in the Order Odonata are highly subject to infection by gregarine parasites. However, despite the important ecological roles that insects play in every ecosystem in which they exist, little research has been devoted to the description of insect immunity. Insects rely heavily on the rapid actions of innate immune mechanisms to prevent infection. We characterized the melanization response in the hemolymph of green darner dragonfly (Anax junius) nymphs. Incubation of chymotrypsin-activated hemolymph with L-DOPA resulted in volume- and time-dependent production of dopaquinone via the phenoloxidase (PO) enzyme, with biphasic accumulation of product. The PO activity was temperature-dependent, with a stepwise increase from 20℃ - 35℃ and maximum activity measured at 35℃ - 40℃. The formation of product was also inhibited in a concentration-dependent manner by diethylcarbonate, a specific inhibitor of PO activity, which indicated that the observed activity was due to the presence of PO enzyme. The rate of formation and quantity of melanin was dependent on exposure to different titers of bacteria. This is the first characterization of both PO activity and melanization response in green darner dragonflies.

关键词： Aquatic Insects Arthropod dragonfly Hemolymph Innate Immunity Insect

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An Enhanced dragonfly Key Exchange Protocol against Offline Dictionary Attack

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Journal of Information Security 2015年第2期6卷 69-81页

作者： Eman Alharbi Noha Alsulami Omar Batarfi Information Technology Department King Abdul-Aziz University Jeddah KSA

dragonfly is Password Authenticated Key Exchange protocol that uses a shared session key to authenticate parties based on pre-shared secret password. It was claimed that this protocol was secure against off-line dictionary attack, but a new research has proved its vulnerability to off-line dictionary attack and proving step was applied by using “Patched Protocol” which was based on public key validation. Unfortunately, this step caused a raise in the computation cost, which made this protocol less appealing than its competitors. We proposed an alternate enhancement to keep this protocol secure without any extra computation cost that was known as “Enhanced dragonfly”. This solution based on two-pre-shared secret passwords instead of one and the rounds between parties had compressed into two rounds instead of four. We prove that the enhanced-dragonfly protocol is secure against off-line dictionary attacks by analyzing its security properties using the Scyther tool. A simulation was developed to measure the execution time of the enhanced protocol, which was found to be much less than the execution time of patched dragonfly. The off-line dictionary attack time is consumed for few days if the dictionary size is 10,000. According to this, the use of the enhanced dragonfly is more efficient than the patched dragonfly.

关键词： Password Authenticated Key Exchange (PAKE) Original dragonfly Patched dragonfly Enhanced dragonfly Two-Pre-Shared Password

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CEVA和香港应用科技研究院推出面向成本和功耗敏感LTE IoT设备的可授权NB-IoT解决方案dragonfly NB1

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电子工业专用设备 2017年第2期46卷 73-73页

专注于智能互联设备的全球领先信号处理IP授权公司CEVA和香港应用科技研究院（应科院）宣布推出dragonfly NB1。这款成本和功耗优化的NB-IoT全面解决方案旨在精简LTE IoT设备的开发。

关键词：应用科技 CEVA dragonfly NB1 LTE IoT NB-IoT 互联设备数字前端全面解决方案协议栈物理层

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AN EXPERIMENTAL STUDY OF FLOW AROUND A BIO-INSPIRED AIRFOIL AT REYNOLDS NUMBER 2.0×10~3

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Journal of Hydrodynamics 2012年第3期24卷 410-419页

作者： SHI Sheng-xian LIU Ying-zheng CHEN Jian-min Key Laboratory of Education Ministry for Power Machinery and Engineering School of Mechanical EngineeringShanghai Jiao Tong University Shanghai 200240 China

The fluid flow around a bio-inspired airfoil with corrugated surfaces and its smooth counterpart at chord Reynolds number Re = 2.0×10^3. and different Angle-Of-Attack （AOA = 0°, 4°, 8° and 12°） were measured by using Particle Image Velocimetry （PIV）. The global characteristics of the fluid flow around two airfoils were analyzed by ensemble-averaged velocity field, distribution of reverse flow intermittency, and time-series flow visualizations. At AOA = 0°, no significant variation of the global flow patterns was recognized for both configurations. The statistical results of reverse flow intermittency results demonstrated that the protruding peaks of the corrugated airfoil delay flow separation occur at AOA = 4°. At large AOAs （8° and 12°）, however, the flow is massively separated in both configurations, the combination of large separation bubble above the corrugated airfoil and small recirculation zones in the upstream upper valley results in earlier separation of the flow. At AOA=8°, the wake region behind the corrugated airfoil is considerably shortened in comparison to the smooth one, indicating a remarkable reduction of the time-mean lift and drag forces, however, at AOA - 12°, the wake region behind the corrugated one is slightly larger than that behind the smooth one. For the case of AOA = 8° and 12°, the time-series flow visualizations demonstrate the intensified vortex shedding process of the corrugated airfoil, which would give rise to enhanced dynamic loading. Due to the fact that dragonfly wing is practically flexible, it is speculated that the wing structure of a gliding dragonfly might be sophisticatedly deformed in response to the periodic loading to reduce the drag.

关键词： corrugated airfoil separated flow Particle Image Velocimetry (PIV) dragonfly gliding flight

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Lagrangian Coherent Structures in Tandem Flapping Wing Hovering

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Journal of Bionic Engineering 2017年第2期14卷 307-316页

作者： Srinidhi Nagarada Gadde Sankaranarayanan Vengadesan Department of Applied Mechanics Indian Institute of Technology Madras Chennai Tamil Nadu India

Lagrangian Coherent Structures （LCS） of tandem wings hovering in an inclined stroke plane is studied using Immersed- Boundary Method （IBM） by solving two dimensional （2D） incompressible Navier-Stokes equations. Coherent structures re- sponsible for the force variation are visualized by calculating Finite Time Lyapunov Exponents （FTLE）, and vorticity contours. LCS is effective in determining the vortex boundaries, flow separation, and the wing-vortex interactions accurately. The effects of inter-wing distance and phase difference on the force generation are studied. Results show that in-phase stroking generates maximum vertical force and counter-stroking generates the least vertical force. In-phase stroking generates a wake with swirl, and counter stroking generates a wake with predominant vertical velocity. Counter stroking aids the stability of the body in hovering. As the hindwing operates in the wake of the forewing, due to the reduction in the effective Angle of Attack （AoA）, the hindwing generates lesser force than that of a single flapping wing.

关键词： dragonfly tandem wings LCS IBM

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The discovery of aeschnidiid nymphs (Aeschnidiidae, Odonata, Insecta)

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Chinese Science Bulletin 2000年第11期45卷 1031-1038页

作者： ZHANG JunfengNanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China

Aeschnidiid nymphs are here first identified and described, and its phylogenetic relationship and bioecological characteristics are deduced. The nymphs known from China, Mongolia, Russia and Brazil and arranged in the family Aeschnidiidae are, in fact, unrelated to this group. All the known five Chinese species in four genera which were erected based on fossil nymphs and placed in the family Gomphidae may be transferred in Aeschnidiidae and merged into one alone, the Sinaeschnidia cancellosa. It is a geographically widespread species from the 'Jehol biota' of East Asia and appeared in the latest Late Jurassic age.

关键词： Jehol biota Aeschnidiidae dragonfly nymphs.

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