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The convergence and miniaturization of the consumer electronic products such as cell phones and digital cameras has led to the vertical integration of packages i.e., 3-D packaging. 3-D chip stacking is emerging as a powerful tool that satisfies such Integrated Circuit (IC) package requirements. 3-D technology is the trend for future electronics, especially hand-held, hence, making it an important...
This paper investigates the problem of robust stabilization for uncertain networked control systems (NCSs) with random time delay via the output feedback control. A mode dependent controller is proposed by modeling the random delay as a Markov Chain. The resulting closed-loop system is expressed as a Markovian jump linear system (MJLS) with mode-dependent delay. Based on Lyapunov-Krasovskii method,...
This paper presents a novel routing protocol based on the Learning Automata method for large scale Wireless Sensor Networks (WSNs) codenamed DRLR (distributed reinforcement learning routing). In this method, each node is equipped with learning automata so that it can learn the best path to transmit data toward the sink. The approach proved to be efficient, reliable, and scalable. It also prevents...
Quality of Service (QoS) provided by the IEEE 802.11e amendment and by the proposed HCF Controlled Channel Access (HCCA) reference scheduler is tailored for Constant Bit Rate traffic streams. Moreover the numerous alternative scheduling algorithms are not suitable to serve Variable Bit Rate (VBR) traffic streams with the required QoS and real-time guarantees. This paper presents Immediate Dynamic...
In modern SoCs, process variations represented as process corners, which designers deal with sufficient design margins. As feature sizes shrink below 90 nm, the effects of process variations are also increasing severely. Moreover, circuit performance and power consumption are strongly impacted by environmental conditions under which the circuit operates. For example, thermal hot spots increase leakage,...
Telesurgery has come to the forefront because of many merits such as a small incision, less bleeding and a short period of hospitalization. By means of internet, telesurgery is practical even the master and the slave are not physically in the same place. Internet, however, causes communication constraints such as time-varying delay and packet loss which induce instability and performance degradations...
The development of silicon based integrated circuits has reached a point where a large portion of an RF system can be integrated onto a single die. However, to create complete RF/millimeter-wave systems, it is necessary to integrate this silicon die with several high performance passive components. Specifically, silicon integrated circuits tend to have limited performance for the design of transmission...
This paper is concerned with network-based static output feedback tracking control for a class of systems that can not be stabilized by a static output feedback controller without a time-delay, but can be stabilized by a delayed static output feedback controller. For such systems, a stable and satisfactory tracking control can be achieved by intentionally introducing bounded network-induced delays...
This paper addresses the trajectory tracking problem of intake burned gas rate for Spark Ignited engines. We propose a simple linear time-varying input delay model of this dynamics, where the delay is represented by an implicit integral equation involving the past values of the input. We extend some recent results from the literature to design a novel predictor-based controller and compare the merits...
The trend of increasing digital system performance by downscaling the device size poses daunting challenges in system design due to the increased power density, higher I/O count, interconnect bandwidth, and timing closure requirements. Silicon carrier with Through Silicon Vias (TSVs) or TSI technology is identified as a system and packaging level solution to overcome all those challenges. In this...
Three-dimensional (3-D) integration technologies have been expected to overcome the limitations of conventional microprocessors, which integrated by two-dimensional (2-D) implementation technologies. This paper focuses on a circuit partitioning strategy for 3-D integrated circuit designs, because it plays important roles to exploit the potential of 3-D integrated circuits. A middle-grain circuit partitioning...
This paper presents the design and implementation of a differential 6-bit variable gain amplifier (VGA) with low group delay imbalance over 64 gain states. Low group delay imbalance is crucial for wireless positioning technologies such as ranging biosensors. The VGA is designed to track the Friss loss and the gain variation is achieved using bias current steering. Two cascaded linear-in-magnitude...
This paper is concerned with exponential stability for stochastic Markovian jump systems with nonlinearity and time-varying delay. By combining Lyapunov-Krasovskii functional method and Jensen inequality technique, a delay-dependent and delay-rate-dependent exponential stability criterion for stochastic Markovian jump systems with nonlinearity and time-varying delay is investigated. The proposed approach...
In 3D ICs, TSV-induced thermal residual stress impacts transistor mobilities due to the piezoresistive effect. This phenomenon is coupled with other temperature effects on transistor parameters that are seen even in the absence of TSVs. In this paper, analytical models are developed to holistically represent the effect of thermally-induced variations on circuit timing. The analysis is based on a semianalytic...
We show that 20 microresonators collectively behave as a single resonance and are controllable with a single voltage signal, thereby exploiting the inherent variability of microresonators enabling multi-ring Balanced SCISSOR devices with two drive signals.
We propose and experimentally validate a detailed model for silicon nanophotonic waveguides which predicts the full spectral distribution function of propagation statistics including the role of interfaces and roughness.
One often encounters the curse of dimensionality in the application of dynamic programming to determine optimal policies for controlled Markov chains. In this paper, we provide a method to construct sub-optimal policies along with a bound for the deviation of such a policy from the optimum via a linear programming approach. The state-space is partitioned and the optimal cost-to-go or value function...
Processor architectures with Fine-Grained Reconfigurable Accelerators (FGRAs) allow for a high degree of adaptivity to address varying application requirements. When processing computation intensive kernels, multiple FGRAs may be used to execute a complex function. In order to exploit the adaptivity of a fine-grained reconfigurable fabric, a runtime system should decide when and which FGRAs to reconfigure...
This paper investigates the problem of exponential H∞ synchronization for a class of master-slave systems with both discrete and distributed time-delays, norm-bounded nonlinear uncertainties and Markovian switching parameters. Using an appropriate Lyapunov-Krasovskii functional, some delay-dependent sufficient conditions and a synchronization law which include the master-slave parameters are established...
In this paper, we investigate ultimate boundedness of large-scale arrays consisting of piecewise affine (PWA) sub-systems linearly interconnected through channels with delays. Under an assumption on subsystem dynamics, it is shown that ultimate boundedness can be reduced to the stability of a linear delay differential system. This enables us to use linear multi-agent system theory. As a result, we...
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