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In this work, we address the problem of reducing the vibrations in the case of a thin flexible beam, with an Euler-Bernoulli configuration thanks to a new type of feedback controller based on a delayed proportional action. The flexible structure is equipped with two piezoelectric patches: one of them works as a sensor and the other as an actuator. Each one of them is bonded on one side of the beam...
This paper examines the accuracy of the zero-order hold (ZOH) model of the digital pulsewidth modulator (DPWM). The influence of the computational delay on the precision of this equivalent DPWM model is discussed in detail. A compensation method is proposed to compensate the deviation of this DPWM model for accurately calculating the stability region with different computational delay and duty-cycle...
Opportunistic communications through wireless ad-hoc mesh networks have been thoroughly studied in the context of military infrastructureless deployments, sensor networks and even human-centered pervasive networking. However, due to the lack of a model that accurately computes the probability distribution of the delay, we usually content ourselves with the mean values. Such an approach can limit both...
Network virtualization offers flexibility by decoupling virtual network from the underlying physical network. Software-Defined Network (SDN) could utilize the virtual network. For example, in Software-Defined Networks, the entire network can be run on commodity hardware and operating systems that use virtual elements. However, this could present new challenges of data plane performance. In this paper,...
WAVE(Wireless Access in Vehicular Environments) designed for vehicle communication has the features of a short initial link, low latency and high mobility. The success of data transmission in WAVE is affected by the priority and size of data and how many nodes are transmitting the data. In this paper, we tested and analyzed how the success rate of data transmission of each node varies according to...
This paper presents a mathematical analysis of the delay performance of the Appropriate Permission Probability algorithm in term of average delay time. The system performance is derived as a function of the number of users. The numerical results reveal that the Appropriate Permission Probability algorithm provides superior performance compared to the Binary tree, Ternary tree and IEEE 802.11 DCF algorithms.
Block traces are widely used for system studies, model verifications, and design analyses in both industry and academia. While such traces include detailed block access patterns, existing trace-driven research unfortunately often fails to find true-north due to a lack of runtime contexts such as user idle periods and system delays, which are fundamentally linked to the characteristics of target storage...
In this paper, we investigate the sampled-data control problem for polynomial sampled-data fuzzy system with time-varying delay. Based on sampled-data technique, a fuzzy controller is designed to guarantee the stability of closed-loop polynomial fuzzy system. By examining the stabilization problem, the Lyapunov-Krasovskii functional (LKF) is adopted and a delay-dependent stabilization condition is...
During the past a few years, control systems are greatly influenced by the evolution of networked control systems (NCSs). However, challenges such as time-delay and packet dropouts in NCSs are still breaking its stride. To analyse and tackle those constraints, Markov chains had been widely used to model time-delay and packet dropouts, and a set of controllers had been designed thereafter. Nevertheless,...
This paper overviews the literature pertaining to the stability analysis of systems with delay-dependent coefficients, which can arise from various scientific and engineering applications. Research on Stability analysis for systems with a single delay is first reviewed, followed by a discussion of some techniques also applicable to the multiple-delay case. We attempt to provide the main ideas of various...
A simple analytical model is proposed to estimate the optimum length of the pinned photo diode. This optimum length is defined as the length at which the optimum full well capacity and the charge transfer time are achieved simultaneously. The simulation results show good agreement with the model proposed. The conventional approach of repeated simulations is avoided using the proposed model.
In this paper, we study the use of redundancy to reduce latency and increase reliability in communication networks. The work is motivated in particular by wireless networks, where channels may be unreliable and channel characteristics may vary over time. The objective is to provide an analysis of the gains achievable through the use of redundant messages. Redundancy increases the network load and...
Conventional system simulators are readily used by computer architects to design and evaluate their processor designs. These simulators provide reasonable levels of accuracy and execution detail but suffer from long simulation latencies and increased implementation complexity. In this work we propose iQ, a queue-based modeling technique that targets design space exploration and optimization studies...
Simulation of the traffic flow is an effective approach to resolve the traffic congestion problem and expect to elucidate the traffic congestion mechanism. In this paper, we propose a traffic flow model based on the MLD (Mixed Logical Dynamical) system approach which regard the lane change and overtaking behavior. The research revealed that traffic jam spreads from driving lane to overtake lane.
Heterogeneous data traffic is increasingly becoming a complex mix of both delay tolerant and intolerant IP traffic. Optical Burst Switched (OBS) networks have since become a backbone network solution to handle the resultant zetabyte volumes of such traffic concurrently using the burst assembly and transmission approach. The strict minimum burst size constraint requirements as well as varying maximum...
Most load balancing techniques implemented in current data centers tend to rely on a mapping from packets to server IP addresses through a hash value calculated from the flow five-tuple. The hash calculation allows extremely fast packet forwarding and provides flow `stickiness', meaning that all packets belonging to the same flow get dispatched to the same server. Unfortunately, such static hashing...
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...
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...
Pricing plays an important role for service provision in cloud computing. In this paper, we investigate price based resource access control in two Monopoly IaaS cloud market, respectively. The two IaaS cloud market is formed by one public cloud service providers (CSPs) and cloud broker (CB), provisioning cloud services to delay-sensitive cloud users (CUs). In the first monopoly cloud market, we treat...
With the urbanization process speeding up, the construction of City Road increased rapidly. So limited road resource is often occupied during the road construction, which makes road capacity of construction affected area greatly decrease. Then the contradiction of city original transport supply becomes more prominent. Therefore, it is very important to make a reasonable traffic organization plan....
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