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Traditional intersection traffic signal control strategy is pre-determined signal with certain phase timing length for each circle. Studies focusing on adaptive traffic signal strategy have somewhat achieved the goal of reducing traffic system delay to some extent. However, few of them capture the benefit of using the queue length as the criteria under the connected vehicle environment, and this paper...
In this paper, we study the influence of communication jamming on the operation of multi-agent systems through computer simulations. In our investigation, a simple flocking model with collision avoidance is adopted, and a recently proposed algorithm for distributed estimation of global features is studied as well. The objective of the research is to study the effects of jamming on the achievement...
In this paper, we aim to develop an efficient speculation framework for a heterogeneous cluster. Speculation is a common mechanism that identifies ‘slow’ node in a cluster and starts redundant tasks on other nodes to guarantee the reliability. We consider MapReduce/Hadoop as a representative computing platform, and our general goal is to accurately and quickly identify the straggler nodes during the...
There are several notions of output stability that are intrinsically different. We present in this work a Lyapunov characterization for the so called robust output Lagrange stability for nonlinear delay systems. This output stability property requires that the overshoots of the output variables be bounded by the magnitudes of their initial values. As in the case for systems without delays, it is expected...
IR-drop induced false capture failures and test clock stretch are severe problems in at-speed scan testing. We propose a new method to efficiently and accurately identify these problems. For the first time, our approach considers the additional dynamic power caused by glitches, the spatial and temporal distribution of all toggles, and their impact on both logic paths and the clock tree without time-consuming...
In this paper, the estimation of a narrowband time-varying channel under the practical assumptions of finite block length and finite transmission bandwidth is investigated. It is shown that the signal, after passing through a time-varying narrowband channel reveals a particular parametric low-rank structure that can be represented as a bilinear form. To estimate the channel, we propose two structured...
As part of a larger scope work that studies network-based positioning, that employs timing measures, this article proposes a methodology to add Cramer-Rao Bounds (CRBs) information to the propagation model. Moreover, it enables a very quick computation of CRBs for timing, avoiding the growing computational effort resulting from Fisher's matrix formulation and its inversion for each required position...
This paper presents a time-interleaved (TI) successive-approximation-register (SAR) ADC with a fast variance-based timing-skew calibration technique. It uses a single comparator-based window detector to calibrate the timing skew. It has low-hardware cost and 104 times faster convergence speed compared to prior variance-based timing skew calibration technique. The proposed technique brings collateral...
This paper considers H∞ reduced-order filtering problem for discrete-time Takagi-Sugeno (T-S) fuzzy systems with time-varying delay in its state. Firstly, Based on the reciprocally convex methods and a novel fuzzy Lyapunov functional, the proposed basis-dependent condition is utilized to ensure that the resulted error system is asymptotically stable with a prescribed H∞ performance and reduce the...
Wireless Networks are vulnerable to collisions and interferences from other radiation sources due to the broadcast nature of wireless channels. Collisions may occur when two or more stations sharing the physical medium transmit simultaneously. Contention-based protocols for medium access control (MAC) aim at reducing collisions in these networks. However, the presence of hidden terminals can still...
The effect of the Doppler shift on processing of a wideband signal is studied. Error of the two-band method of TEC estimation because of the Doppler shift on is estimated.
Pseudolite-based systems and airborne relay-based positioning system (ARPS) have a limitation wherein the position error increases as the distance between the user and the area where the segments of the system are configured increases, owing to the low altitude of the navigation signal transmitters. To enhance the accuracy of the user, we propose a self-correction scheme based on the ARPS. In the...
This paper presents a new single-phase technique for dynamic phasor estimation using a sample by sample digital processing approach. The estimation process is performed in three stages. In the first stage, an efficient FIR filtering of the input signal is made to reject out-of-band and harmonic interference. The second stage uses a parameterized EPLL to track amplitude, phase, frequency and ROCOF...
In this paper, we present a design methodology for synchrophasor estimation systems based on a convex semi-infinite optimization approach. Concretely, we present a suitable objective function for the problem and show how different performance constraints can be formulated. The advantage of this over most methods is that it allows us to control precisely and completely the behavior of the system on...
Network-on-Chip technology has become very popular in the recent decade to address the scalability issue in multi-core processors. Developing the inter-connection network improves the performance of multi-core systems at the cost of additional power and design complexity. Power-gating of router buffers as the most power consuming part of Network-on-Chip has been proposed recently to reduce the static...
In a network-on-chip (NoC) based system, the NoC is a shared resource among multiple processor cores. Network requests generated by different applications running on different cores can interfere with each other, leading to a slowdown in performance of each application. The degree of slowdown introduced by this interference varies for each application, as it depends on (1) the sensitivity of the application...
A Loran-C system is a hyperbolic navigation system which works based on the TOA methods. The cycle identification and ECD estimation accuracies have considerable effects on the Loran-C system receivers localization accuracy so it is important to estimate the reference point and ECD as precisely as possible. White Gaussian noise degrades the performance of cycle identification and ECD estimation. Also,...
Aim of this paper is to estimate time delays in nonlinear dynamic systems with unknown time-delays, such that time-delays appear in both state and output equations. The problem of estimating unknown delays is formulated as a dynamic optimization problem in which the cost function is defined based on the least-squares error between predicted and actual system output. Using proposed estimation method...
To be competitive, transportation systems must be able to analyze and to evaluate, in real-time, critical differences between the short-term planned actions and the actual performed actions generating states of undesirable or unacceptable risk. We propose a method for monitoring the dynamic evolution of risk in the operational flow of a transportation system. It consists in an approach assessing risk...
Super-resolution theory aims to estimate the discrete components lying in a continuous space that constitute a sparse signal with optimal precision. This work investigates the potential of recent super-resolution techniques for spectral estimation in multi-rate sampling systems. It shows that, under the existence of a common supporting grid, and under a minimal separation constraint, the frequencies...
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