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Proliferation of mobile terminals pushes the limits of scalability, capacity and coverage to unremittingly sustain V2X services. Massive machine type communication has the potential to ensure the autonomous sustainability of stream QoS. Catering for diversified packet-based traffic flows in a ubiquitous framework dictates the inline evaluation of the queue status, a complex and arduous task for scalable...
The current controller sets the base of the dynamical performance for drives running flux oriented control. In the literature, can be found different approaches used for the classical linear dq-current control. This paper has as aim a theoretical and practical benchmark of the diverse types of linear controllers suitable for drive application. There are evaluated different properties like: dynamical...
A method of optimizing the use of server resources that can reduce the energy costs of a network while preserving service quality parameters is proposed in this paper. This method involves the use of resource involvement schedule based on long-term statistics. Unlike existing methods, proposed method simultaneously considers the losses of requests, expected delay and energy efficiency of processing...
In this paper a linear time delay systems of retarded type are presented as a potential model that can capture the behavior of human arm movement. The line tracking experiment is designed to validate the performance of the proposed model. The issue of stability of the time delay systems is presented and the critical delays curve is computed to indicate the stable region of the system in the delay...
This paper presents an online model-free adaptive traffic signal controller for an isolated intersection. The problem is formulated as a Reinforcement Learning (RL) task. We base our solution on the Q-learning algorithm. In contrast with other studies in the field, we use the queue length rather than the average delay as a measure of performance. Also, the number of queuing vehicles in non-conflicting...
In this paper, we present a simple analytical delay model for memristive memory cells. The output voltage evolution is obtained analyzing the charge-flux dynamics when a voltage ramp is applied to the input. From this evolution, the propagation delay is calculated. The model is validated using the VTEAM memristor model for different input rise time values of the applied ramp. The proposed model can...
Grid synchronisation plays a vital role in grid tied inverters where the phase, frequency and voltage amplitude of grid is a critical information. In order to extract this information accurately, an improved technique of single-phase synchronous reference frame phase locked loop (SRF-PLL) is used in grid tied inverters. This method uses a transport delay block and a changed Park transform in such...
In this paper, we propose a filter structure to satisfy velocity and acceleration limitations for arbitrary input signals. The shape of step signals is sometimes converted into trapezoidal wave in order to satisfy velocity limit in FA field. Then we can prevent an overload for the robot. In some cases, physical protection of equipments, safety and ride quality are achieved with limitation of input...
Comparators are a critical element of Analog-to-Digital converters (ADCs) intended to operate in a harsh environments such as the automotive. The influence of temperature on key comparator properties such as the delay must be well understood to maximize their speed. In this paper a Double-Tail latch analysis leads to an analytical expression for the delay to more accurately guide the design over a...
Cellular Automata with Random Memory (CARM), which has been recently introduced, is a time-delay discrete time system such that delay is a random variable. Delay in discrete time systems can be easily generated from a random delay characteristics of wires and transistors in programmable logic devices. Therefore implementation of CARM model is not required any special hardware. In this paper, a new...
Sink mobility has been proven to be an effective way for minimizing delay in data delivery and mitigating the hot spot problem in wireless sensor networks (WSNs). However, there is an impact of the path selection for the mobile sink on the data delivery delay. Hence selection of optimal number of halting positions called rendezvous points (RPs) and their locations are challenging in WSNs. In this...
Sub-threshold circuit is a promising circuit design style for IoT application, but the timing closure, especially hold timing fixing is a big challenge for designers. This paper proposes a mathematical method to estimate the number of insertion inverters/buffers for hold timing fixing in each short path. Firstly, the distribution of path delay is rigorously proved to be lognormal distribution in the...
Multi Criteria Decision Making (MCDM) is useful for choosing a possible objective. The objective is to investigate how far TOPSIS method of MCDM can be utilized for delay sensitive network selection problem. In this paper, TOPSIS method is used for taking decision in delay sensitive network selection for achieving reliability of network selection with Wireless Body Area Network (WBAN) parameters;...
This paper applies ultra-local models (also labeled intelligent PID) to Automatic Generation Control (AGC) for a Multi-Area power system in the presence of communication delay. The AGC model is built in Simulink/Matlab and co-simulated with Network Simulator 2 (NS2) through PiccSIM, a simulation platform for (wireless/wired) networked control systems. A careful comparison is made between the performance...
In this position paper, a fast real-time algorithm for the sound source localization system using microphone array is proposed. The algorithm includes three steps: Delay time estimation using time difference of arrival (TDOA); Searching area selection based on angle of arrival; and, Sound source localization using a newly golden section searching (GSS) method. Thanks to the first two steps, we can...
The use of drones has recently been expected in many applications such as exploration in dangerous areas, security surveillance, and logistics. Accurate position control of the drones is required in these applications. This work is concerned with the remote position tracking control of a quadrotor-type drone via visual feedback control. The transient response or stability of the drone may be significantly...
Behavior of stochastic Petri net can be approximated by difference equation resulting after fluidification. Vásquez et al. have introduced Gaussian noise to reduce approximation error. We suggest a method to reduce the number of additions of noise while keeping errors as small as Vasquez's method.
Multimodal transport offers an advanced platform for more efficient, reliable, flexible and sustainable freight transport. In order to achieve sustainable planning in a complicated transport system, it is very interesting to use methods include in the fields of operational research. In this article, we propose a mathematical model to solve the multi-objective optimization problem applied in the multimodal...
The vision of a software defined radio (SDR) is to implement in different software systems of communications using the same hardware platform. An advanced SDR system consists of two fundamental components: a programmable RF component and another reconfigurable FPGA-based component in charge of performing high-speed signal processing. Since the sampling rate of the ADC and DAC converters is generally...
We derive a simple, closed, equation for the delay caused by random outages or downtimes that affect a node in a communications network. The model is an M/G/1 queue with nonexhaustive interruptions, in which the server goes on and off successively, at random times, no matter whether the current job is finished or not. The arrival process is Poisson; while the distributions of service and on/off times...
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