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This paper deals with the application of alienation coefficients for the detection and classification of various faults on transmission lines. A Global Positioning System is used to synchronize sampling of current signals at both the ends of the transmission line. The alienation coefficients are obtained by comparing successive half cycles of absolute values of current samples at each end. At each...
A pattern reconfigurable high-gain wide-angle antennas using MESFET switch is presented. The proposed antenna is based on a new antenna structure like Chinese character “***”. The measured synthesis of half-power beam width is about 105° in both E plane and H plane while keeping the antenna low side-lobe level and high gain at 6dBi, in good agreement with the simulated results.
In adaptive video streaming, rate adaptation is an important procedure for switching between different representations provided at the server, to cope with the network fluctuations. However, most of adaptation methods ever since mainly focus on the case of constant bitrate (CBR) video. In this paper, we present a new method that can effectively support variable bitrate (VBR) videos. Our method is...
This paper develops a new self-excited threshold autoregressive model (SETAR) for US equity Index returns modeling and analysis. First, a two regime switching model is formulated. The regime state is controlled by a simple piecewise function of lagged values from the time series itself. The hypothesis test is conduct to verify the statistical significance of two regimes in stock index returns. Then...
In this paper, the relationship between visual attention and eye blinking is described. In our experiment, we observed blinking when a subject performed a task. We determined that the subject's visual attention functions during the task by electrodermal activity. Experimental results showed that blink rate decreased when the subject's visual attention was engaged. On the other hand, blink rate increased...
A Vcm-based split capacitor switching scheme for high speed successive approximation register (SAR) analogue-to-digital converters (ADCs) is presented. By reducing the time constant of the bit cycles, the proposed technique achieves shortest settling time among the existing switching techniques. It also reduces total capacitance by 75% and switching energy by 93.7% compared with the conventional method...
Laser-driven microwave semiconductor switches demonstrate the ability to commutate power in sub-Terahertz frequency range. The effect of switching is based on photoconductivity induced in semiconductors by external laser emission. It is used to rapidly change and subsequent restore electro-dynamic properties of the switching resonator cavity. The most promising application is dynamic nuclear polarization...
Using an intrinsic percolation model, this paper presents a statistical model which predicts the probability of Shallow Trench Isolation (STI) breakdown as a result of aging in N-type Laterally Diffused MOSFET (NLDMOS). During the STI's etch process particles might “shadow” the silicon etch resulting in protrusions of Si at different depths and locations. This effect which normally has a negligible...
SOI processes have become the mainstream technology for wireless front end manufacturing following recent optimization of starting materials and fabrication processes. In this paper, we will describe such RFSOI platform for RF switches, the process optimizations and the devices offering required for efficient FEM design.
This paper is focused on utilizing the nonlinear electromechanical coupling to overcome the fundamental sensitivity limits of classical electrical or mechanical sensors. The stiffness of the suspended gate of Flexure-FET changes with the capture of the target molecules and the corresponding change in the gate shape or deflection is reflected in the drain current of FET. This paper deals with the design...
In the electricity deregulation, the electricity consumption of consumers depending on the electricity prices will change because the electricity prices are expected to fluctuate according to the market conditions. Therefore, the fluctuation of the electricity consumption can cause difficulty of distribution system operation, e.g. minimizing the distribution line losses, improving the voltage profile,...
This paper presents an analysis of a high step up DC-DC converter for Fuel Cells systems. Firstly, it is presented the Fuel Cell model and the average and small-signals model of the DC-DC converter, which is used to properly design the control of the DC-link voltage for the voltage source inverter. Additionally, it is also shown the control topology for the DC-AC converter when the system supplies...
The future electricity distribution networks employ small-scale Distributed Generation (DG) units due to their numerous advantages. This paper sets out to find the best location for placing a DG unit so as to optimize certain parameters of interest. We formulate the issue of finding the most suitable place for a DG unit using Multi Criteria Decision Analysis (MCDA). In addition to discussing a new...
With huge penetration of distributed generators (DGs), distribution systems become more and more active and flexible. To accommodate DGs in a much more optimal way, cooperation between transmission networks and distribution networks, even distribution networks and distribution networks, should be further strengthened. A cooperative sequential reconfiguration method is proposed in this paper, which...
In this paper we present an autonomous wide band adaptive interference canceller solution that alleviates the problem of performance degradation of an electronic support system (ESS) operating in a high interference RF environment. The interference canceller improves the sensitivity and dynamic range of a complex receiver to allow the detection of signals of interest that are dominated by local high...
We consider a problem of topology design and control when some of the links may become unavailable. When a network operates in a contested environment, the operator may wish to alter the network topology to enhance robustness. This may come at the expense of operational costs. We consider a dynamic programming framework where the goal is to minimize time average costs, where costs are the sum of network...
Network packet classification plays a pivotal role in packet-switched networks; it is at the heart of many functions including firewalling, QoS routing, and OpenFlow-based switching. However, packet classification is a hard problem, as packets must be classified within a short time frame. Existing classification techniques use sophisticated data structures which are traversed by generic search algorithms—that...
We propose a scheme for quickly completing a sorted-table search, which is one of most common searches employed in network processing. In the scheme, the range to be searched is narrowed using only a simple calculation. This narrowing is incorporated into conventional search procedures such as binary search. Simulation results show that our proposed approach reduces the number of times element values...
The dead-time, the load degree, or the resonate inductance and capacitance all would affect the phase-shifted full-bridge PWM converter to implement ZVS. In this paper, emphasize research on the influence of the dead-time. Analyse the switch process of the different dead-time, the formula of the optimal dead-time, and the experiment results are also given.
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