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In this paper, the problem of queue in convenient stores is considered. We propose a low cost automatic queue length monitoring system by using an Internet-of-Things (IoT) platform. This system can detect the length of queue and the number of people that enqueue and leave the queue. If the length of queue is critical, the system will alert to staff via LINE Notify. Experimental results indicate that...
A kind of nonlinear equation with dissipative term ∊x + x = ∊F(ōt, x), with ō ∊ Rd and d ∊ N, is considered in this paper. Here function F is real analytic. Based on the Renormalizaion Group techniques and Multiscale techniques, the existence of quasi-periodic solutions have been proved for the above-mentioned equation. This generalizes the known results in the existing literatures.
Traditional DDoS anti-spoofing scrubbers require dedicated middleboxes thus adding CAPEX, latency and complexity in the network. This paper starts by showing that the current SDN match-and-action model is rich enough to implement a collection of anti-spoofing methods. Secondly we develop and utilize advance methods for dynamic resource sharing to distribute the required mitigation resources over a...
This paper proposes a disaster avoidance control method for use against heavy rainfall and discusses its effectiveness through actual weather data. The proposed control method uses geographical information data including weather data, hazard area data, and physical network data. By applying technologies related to meteorology, erosion control, and civil engineering to such data, the proposed method...
In a software defined network (SDN), the control plane needs to frequently collect flow statistics measured at the data plane switches for different applications, such as traffic engineering, flow re-routing, and attack detection. However, existing solutions for flow statistics collection may result in large bandwidth cost in the control channel and long processing delay on switches, which significantly...
This paper represents design procedure of control system for interleaved bidirectional dc-dc converter. Dynamic model of the converter was compiled with help of steady-state analysis. The theoretical results were verified by means of modeling in PSIM package.
In this paper, a game-theoretical solution concept is utilized to tackle the collusion attack in a SDN-based framework. In our proposed setting, the defenders (i.e., switches) are incentivized not to collude with the attackers in a repeated-game setting that utilizes a reputation system. We first illustrate our model and its components. We then use a socio-rational approach to provide a new anti-collusion...
A fundamental problem to be resolved to achieve carrier grade functioning of an SDN network is the controller placement problem. The problem has been traditionally limited to optimally assigning switches to static physical controllers and placing those controllers over a network topology. However, virtualized controllers in place of physical ones could largely increase the dynamism in network control...
The OpenFlow-based SDN is widely studied to better network performance through providing flexible routing paths. However, being designed to configure path hop-by-hop, it faces the scalability issue — both the flow table overhead and path setup delay are unacceptable for large-scale networks. In this paper, we propose PACO, a framework based on Source Routing (SR) to address that problem through quickly...
Transfer functions and equivalent transformed structures of observed-based linear time-invariant control systems with the deterministic unmeasured disturbance have been found. They allow to simplify analysis of these systems. To determine the transfer functions used in formulas for the cell matrix.
Software Defined Networking (SDN) enables network innovation and brings flexibility by separation of the control and data planes and logically centralized control. However, this network paradigm complicates flow rule management. Current approaches generally install rules reactively after table misses or pre-installs them by flow prediction. Such approaches consume nontrivial network resources during...
Packing polygonal objects to be cut in fiber or leather densely for efficient use of material is important to automatic die-cutting machine tools. Prior to computing a tight pack of objects in a given area of material, proper gaps among packed objects should be firstly reserved to prevent over-cutting on the edges of neighboring objects by a die. To maintain object gaps for packing, we propose a new...
In robot teleoperation system, human operates and respond rely on what the video screen displays. However, unavoidable delays, such as network transmission, cause asynchronous communication between human and robot and further result in human operation errors, such as redundant or duplicate operations or even wrong commands. Different from users in large-scale industry, users in daily life may not...
The ACC will offer workshops addressing current and future topics in automatic control from experts in academia, national laboratories, and industry. The workshops at ACC 2017 will take place prior to the conference on Monday, May 22 and Tuesday, May 23, 2017.
In this paper, simulation and practical implementation of direct power control is presented for a PWM Rectifier application. The proposed DPC control has several advantages, including the grid current very close to sinusoidal waveforms (TDH < 1.2%), and good regulation of DC-bus voltage is achieved using the PI controller. The simulation and the experimental results obtained in this study, demonstrate...
This paper describes the control by the selective harmonics elimination PWM of three level inverter using FPGA device. The NPC inverter is realized with six similar modules type Mitsubishi. Each one contains two bi-directional IGBTs. To control the four semi-conductors of each leg, switching angles allowing the elimination of the 5th, 7th and the 11th harmonic have been computed basis on the SHEPWM...
This paper presents a new control strategy of autonomous mobile robot in running environment. The robot is considered as an individual agent aimed at executes different tasks in term of motion under constraints applied on robot structure. The flat model of Pioneer 3dx robot is developed in order to prove that the system is flat and has various helpful properties which can be exploited to build the...
This paper is presented to introduce a system constituting of a PLC (Programmable Logic Controller) that is connected to the level switches which is monitoring the level of the tank. This system saves the tank from over flowing which increases the safety and efficiency. The levels are considered as an input to the PLC and the pump is controlled by the output of PLC which pumps out the solvent or any...
Design and implementation of a PEM fuel cell controller presented. The intelligent controller design is based on a neuro-fuzzy algorithm. The implemented system has successfully controlled the air mass flow rates of the fuel cell stack using labview programming. The real-time data shows the effectiveness of the proposed smart controller algorithm.
Chemical coagulation process efficiently removes both natural organic matter and small colloidal particles that have negative impacts on taste, smell and appearance of treated water. The current practice requires regular manual intervention. In smaller WTPs, often serving remote communities, regular intervention by experienced operators is not feasible and, hence, coagulant overdosing and underdosing...
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