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Impulse-Radio Ultra Wideband (IR-UWB) is a promising technology for indoor localization due to its robustness against multipath interference. In this paper, to deal with the synchronization requirement among anchors in traditional time-difference-of-arrival (TDOA) localization, which is difficult to achieve, an asynchronous time-difference-of-arrival (TDOA) localization method is proposed. The theoretical...
Multiuser cooperation is potential to improve the network throughput and increase the intended end-to-end communication reliability. For different purposes, the cooperative node has two selections: transmit its own signals or relay the intended source's message. Unlike the conventional relay selection problems, we consider a new scenario in which the receiver can perform interference cancellation...
Due to the technical difficulties related to the practical application of Lyapunov's 2nd or “direct” method in the adaptive control of nonlinear systems as an alternative approach the use of “Robust Fixed Point Transformations (RFPT)” were suggested on the basis of recent researches. Various application possibilities were revealed for the new controller and design for imprecisely and partially modeled...
The importance of validating and reproducing the outcome of computational processes is fundamental to many application domains. Assuring the provenance of workflows will likely become even more important with respect to the incorporation of human tasks to standard workflows by emerging standards such as WS-HumanTask. This paper addresses this trend by an actor-based workflow approach that actively...
In this paper, we propose a fast barrier synchronization mechanism, targeting Network-on-Chip based many-core architectures. Its salient feature is that, once the barrier condition is reached, the “barrier release” acknowledgement is routed to all processor nodes in a broadcast way in order to save area by avoiding storing source node information and to minimize completion time by eliminating serialization...
In recent years, many techniques for self repairing of the systems implemented in FPGA were developed and presented. The basic problem of these approaches is bigger overhead of unit for controlling of the partial reconfiguration process. Moreover, these solutions generally are not implemented as fault tolerant system. In this paper, a small and flexible generic partial dynamic reconfiguration controller...
In this paper, a Johnson-encoded Reconfigurable Synchronous/Bi-Synchronous (RSBS) FIFO is proposed which can adapt its operation to either synchronous or bi-synchronous mode. The proposed FIFO which can be used to interface modules in Voltage/Frequency Islands (VFI) based Networks-on-chip, is capable of alleviating the excessive energy consumption and high performance overhead of the conventional...
Time synchronization is one of the key points in distributed real-time computer system. At first, a time synchronization method under 1PPS signal is put forth. Secondly, two kinds of relevant synthetic disturbance are analyzed, and time synchronization logic is studied to cope with the disturbance. Arena software is chosen to model and simulate the time synchronization procedure. At last, the whole...
Modeling the execution of a processor and its instructions is a challenging problem, in particular in the presence of long pipelines, parallelism, and out-of-order execution. A naive approach based on finite state automata inevitably leads to an explosion in the number of states and is thus only applicable to simple minimalistic processors. During their execution, instructions may only proceed forward...
This paper describes a method of digital audio public address (PA) system based on Ethernet. The main framework of the system is proposed and the core techniques are analyzed. The hardware design of network audio devices and software design are described in details in this paper. CYCLONE II EP2C5FA484 programmable FPGA chip and audio codec VS1003 are proposed in the network audio terminal design,...
As a new type of automatic transmission in recent several years, dual clutch transmission (DCT) owns the advantages of both automated manual transmission (AMT) and hydraulic automatic transmission (AT), and shows a huge development potential in automatic transmission family. In this paper, a dynamic model of the shift process for a six-speed wet-type DCT is presented, the simulation model has been...
In this paper, the dynamics of the coupled Lorenz-Rössler systems with the unidirectionally and the bidirectionally linear coupling are considered. The results show that not only the non-chaotic behaviors appear, but also the region for the chaotic behaviors can increase greatly because of the unidirectionally linear coupling. And the codimension-2 bifurcations can be born because of the bidirectionally...
Adaptive control technique is adopted to synchronize two identical non-autonomous systems with unknown parameters in finite time. A virtual unknown parameter is introduced in order to avoid the unknown parameters from appearing in the controllers and parameters update laws. The Duffing equation and a gyrostat system are chosen as the numerical examples to show the validity of the present method.
In this paper, we address stochastic chaos synchronization of two stochastic Lorenz-family systems with bounded random parameters. In the analysis the stochastic Lorenz-family system is firstly transformed into an equivalent deterministic nonlinear system by the Chebyshev polynomial approximation, so that the chaos synchronization problem of stochastic Lorenz-family systems can be reduced into that...
In this paper, active sliding mode controllers are designed to realize the control and synchronization of fractional-order hyper chaotic systems. Based on stability theorems of fractional calculus, the stability analysis of the proposed method is performed. Finally, three numerical simulations are presented to show the effectiveness of the obtained results. The simulations are all implemented using...
In this paper, the sliding-mode lag synchronization control scheme is proposed based on the neural network to synchronize two different delayed chaotic systems. An integral delayed sliding surface is presented to design the sliding mode control. The lag synchronization controller is achieved by combining the RBF (radial basis function) neural network with sliding-mode control. Numerical simulations...
In this paper, the chaos in fractional-order neutral delay differential equation (NDDE) with fractional-order is discussed. Two different values of fractional-order are considered in the investigated system. Based on the chaotic NDDE system, we realize spread secure communications. Finally, fractional and integer-order neutral differential chaotic systems are compared in communication, and the simulation...
This research gives a new improvement scheme of Lorenz signal based on chaotic masking secure communication, which improves the notable features of Lorenz signal and the confidentiality of transmission signal in channel. The scheme here mainly changes the properties of chaotic signal in both time and frequency domains, which makes the masking signal in channel more like noise. This paper also does...
The proportional plus-derivative control of chaotic system is concerned. Controller is firstly designed and then the controlled stochastic forced brusselator is transformed into its equivalent deterministic one by the Chebyshev polynomial approximation. Finally, the chaotic motions of forced brusselator can be successfully converted to the stable lower periodic orbits by proportional plus-derivative...
Bursting oscillation in neurons and other excitable cells is thought to be the primary mode of electrical behavior in many biological system. In the previous work, we studied the bursting types in the single Morris-Lecar model with current-feedback control. In this paper, based on studying the nearly complete synchronization of two electrically coupled bursting neurons, we do the further research...
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