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[IEEE 2018 5th International Conference on Systems and Informatics (ICSAI) - Nanjing, China (2018.11.10-2018.11.12)] 2018 5th International Conference on Systems and Informatics (ICSAI) - An Optical Network Flow Control Algorithm Based on Benefit Optimization and Dynamic Path Coefficient
摘要： To avoid the congestion in flow control, this paper proposes an optical network flow control algorithm based on benefit optimization and dynamic path coefficient (BO-DPC). This algorithm adjusts path coefficient in time according to the network information. When the flow of requests can be passed lightly, the metric coefficient should be reduced. Whereas path metric coefficient should be increased. The adjustment can make request flow to a less congestion path. And if there is a congestion coming, the bigger request must be automatically abandoned. It has significant advantage compared with traditional SPF algorithm in the same circumstances, which verifies the applicability and rationality of the algorithm.
关键词： BO-DPC,Flow Control,SPF
更新于2025-09-23 15:22:29
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Dynamics of dual-pulse laser energy deposition in a supersonic flow
摘要： Dynamics of plasma generated by the dual-pulse laser in a supersonic flow was studied numerically. The mathematical model includes species, momentum, electronic, vibrational and translational energy equations for the multicomponent ionized air. The model examines temporal dynamics of the formed air plasma and how it affects the drag, pressure signature and vorticity generation in a supersonic flow around a wedge. We observed that nonequilibrium plasmas is more effective in the drag reduction compared with the simultaneous thermal energy addition. The maximum drag reduction of around 50% and the maximum drag coefficient reduction of 30% was attained through the dual-pulse laser energy deposition. Variation of the plasma spot orientation did not significantly influence the drag reduction. We suggested that the surface pressure changes were not controlled by the vorticity generation but occurred due to the density changes and the formation of the low–density plasma spot.
关键词： supersonic flow control,energy deposition,laser,numerical modeling
更新于2025-09-23 15:19:57
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[IEEE IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Lisbon, Portugal (2019.10.14-2019.10.17)] IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Distributed Robust Power Flow Control for Photovoltaic Generators Over LV Microgirds with Limited Communication Bandwidth
摘要： This paper presents a robust distributed event-triggered control strategy that will regulate the power output of massive photovoltaic (PV) generators in a low-voltage (LV) microgrid, which can achieve all of PV generators to operate at the same ratio of available power based on their status and capacity through a spare network with limited communication bandwidth and time delays. Due to employing event-triggered communication with time delays, the proposed control strategy is fully distributed and only driven at their own event time, which effectively reduces the frequency of controller updates compared with continuous-time feedback control, moreover is also robust to time delays. Furthermore, each PV only requires the local voltage and current measurement from its own and some nearest neighbors (but not all) for the distributed power control at the last event-triggered time to achieve the active and reactive power outputs to operate at the same ratio. The inequality technique is employed to devise the stability and convergence analysis of the proposed dynamic event-triggered conditions. The effectiveness of the proposed control strategy is verified under various scenarios by a modified IEEE 34-bus test network in MATLAB/SimPowerSystems.
关键词： robust power flow control,limited communication bandwidth,low-voltage microgrid,Distributed cooperative
更新于2025-09-19 17:13:59
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[IEEE 2018 International Conference on Applied Electromagnetics, Signal Processing and Communication (AESPC) - Bhubaneswar, India (2018.10.22-2018.10.24)] 2018 International Conference on Applied Electromagnetics, Signal Processing and Communication (AESPC) - Temperature effect on a-SiCN:H waveguide for application of sensing
摘要： Long term evolution-wireless local area network (LTE-WLAN) aggregation (LWA) has recently emerged as a promising third generation partnership project (3GPP) Release 13 technology to efficiently aggregate LTE and WLAN at the packet data convergence protocol layer, allowing uplink traffic to be carried on LTE and downlink on both LTE and WLAN. This removes all the contention asymmetry problems of WLAN and allows an optimum usage of both licensed and unlicensed band for downlink. In this paper, we present a new feature of LWA, its flow control scheme, which controls how to aggregate downlink traffic in licensed and unlicensed bands. This aggregation technique exploits user equipment-based flow control feedback in the form of LWA status reports, and can be expanded to work with any number of frequency bands and radio technologies. The same concepts apply to 5G networks, although the performance evaluation provided here is in the context of LTE-Advanced Pro. Simulation results in a typical enterprise scenario show that LWA can enhance user performance up to 8 times over LTE-only, and 3.7 times over WLAN only networks, respectively. The impact of the file size and LWA status report frequency on network performance is also investigated.
关键词： wireless local area network (WLAN),aggregation,LTE WLAN aggregation (LWA),flow control,long term evolution (LTE),Cellular networks
更新于2025-09-19 17:13:59
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Effect of Cyano Substitution on Conjugated Polymers for Bulk Heterojunction Solar Cells
摘要： Portable and autonomous pumps are in critical demand for low-cost point-of-care testing (POCT) applications in microfluidic fields. In microfluidic laboratories, commercial pumps (e.g., syringe pumps, pressure pumps, or peristaltic pumps) are widely used for precise fluid delivery, however they can’t be integrated into miniaturized microfluidic devices due to their bulky sizes and high costs. Here, we propose a portable plug-and-play syringe pump with compression force, and constant flow autoregulation is realized through the microfluidic flow regulatory chip which contains three passive valves. Importantly, the liquid flow rate through regulatory chip in the pump. This feature has been used for providing steady fluid infusions for passive sample mixing in a T-junction microfluidic mixer or high efficiency particle separation in an inertial microfluidic chip. We envision that the self-sufficient and portable plug-and-play syringe pump will facilitate the miniaturization of microfluidic systems which will shed light on the large-scale application of microfluidic technologies.
关键词： Passive valve,Flow control,Plug-and-play pump,Flow mixing,Particle separation,Microfluidics
更新于2025-09-12 10:27:22
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Effects of Laser Energy Deposition on the Transition Characteristics of Shock Reflection in the Dual Solution Domain
摘要： Numerical simulations were conducted to investigate the transitional characteristics of shock reflections in the dual solution region using laser energy deposition. The numerical approach was validated by comparison to experimental results of the deposition laser energy in front of a blunt model. The simulation results show that the energy deposition in the freestream region can induce a transition of the shock reflection system and the transition characteristics can vary with the position and energy of the laser deposition. As the amount of energy increases, the time required for the transition also increases, and the transition cannot occur when the energy that is applied exceeds a certain level. The time required for the transition can be reduced when the position of energy deposition is moved downstream. The results also show that the transition does not occur regardless of the deposited energy when the laser energy is deposited on the symmetry line.
关键词： shock reflection transition,flow control,laser deposition,supersonic flow
更新于2025-09-11 14:15:04
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Flow with nanoparticle clustering controlled by optical forces in quartz glass nanoslits
摘要： In this paper, we demonstrate nanoparticle flow control using an optical force in a confined nanospace. Using nanofabrication technologies, all-quartz-glass nanoslit channels with a sudden contraction are developed. Because the nanoslit height is comparable to the nanoparticle diameter, the motion of particles is restricted in the channel height direction, resulting in almost two-dimensional particle motion. The laser irradiates at the entrance of the sudden contraction channel, leading the trapped nanoparticles to form a cluster. As a result, the translocation of nanoparticles into the contraction channel is suppressed. Because the particle translocation restarts when the laser irradiation is stopped, we can control the nanoparticle flow into the contraction channel by switching the trapping and release of particles, realizing an intermittent flow of nanoparticles. Such a particle flow control technique in a confined nanospace is expected to improve the functions of nanofluidic devices by transporting a target material selectively to a desired location in the device.
关键词： nanoparticle flow control,two-dimensional particle motion,optical force,intermittent flow,nanoslit channels
更新于2025-09-11 14:15:04
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Discharge characteristic and flow control experiment for pneumatic actuator of dielectric barrier discharge multistage plasma
摘要： Test and diagnosis of the characteristics of the air flow induced by the pneumatic actuation of the plasma are the important basis for the plasma flow control. In order to well understand the electrical characteristics of the pneumatic actuation of the plasma and the influence of the actuation voltage amplitude and the phase on the induced flow characteristics, the dielectric barrier discharge actuators symmetrically distributed were selected for the experimental research. The experiment result shows that the discharge form of the actuators symmetrically distributed is filamentary discharge, uniformly occurring around the high-voltage electrodes, and this is different from the discharge picture of the actuators asymmetrically distributed; when the voltage applied on the high-voltage electrode near to the actuators has the same amplitude and phase, the induced directional jet flow is vertical to the actuator surface, and the speed is at the order of meter per second; the change of the amplitude or phase of the voltage applied on the high-voltage electrode of the actuator can induce a jet flow towards the upper left or the upper right, but cannot effectively increase the induced airflow velocity.
关键词： Dielectric barrier,flow control,pneumatic actuator,discharge characteristic
更新于2025-09-09 09:28:46
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Surface velocity model of the flow caused by a DBD plasma actuator; DBDプラズマアクチュエータによる流れの表面速度モデル;
摘要： The surface velocity model is proposed for modelling the flow caused by a DBD plasma actuator. While numerical model presented up to now for the DBD plasma actuator, i.e. Suzen’s model, needs to calibrate the five parameters that must be determined by comparison with the experimental results, the surface velocity model presented here requires calibrating three parameters only. The flow by the surface velocity model is compared with the experimental results and that of Suzen’s model. When DBD plasma actuators are activated on the surface of the flat plate or on that of the circular cylinder, the induced flow appears near the electrode. And then the temporal and spatial development of the flow by the surface velocity model is consistent with the results from the experiment and the Suzen’s model. The surface velocity model is very easy to use compared with the Suzen’s model, and it can well simulate the induced flow caused by the plasma actuator.
关键词： Numerical simulation,DBD plasma actuator,Numerical model,Induced flow,Flow control
更新于2025-09-04 15:30:14