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With the complexity of today's networks, it is impossible to know you are actually secure. You can prepare your network's defenses, but what threats will be thrown at it, what combinations will be tried, and what directions they will come from are all unknown variables. Most medium and large-scale network infrastructures include multiple high-speed connections to the Internet and support many customer...
Embedded systems are becoming more and more popular in current digital era. In order to improve the development efficiency, a framework of Object-Oriented (OO) program on embedded system is designed in this research. UML modeling language is adopted to construct the model of embedded system. By using UML, programmers can understand the system structure easily and improve the system design. This will...
As Contourlet transform can give an asymptotic representation of edges and contours in image by virtue of its characteristics of multidirectional and flexible, it is introduced into the quality assessment of fused image. A new method (CSSIM) for image fusion quality assessment based on Contourlet and structural similarity of images is put forward in this paper. We introduce distortion channel to simulate...
Excellent resistance switching properties such as fast switching time (< 50 ns), high on/off ratio (> 106), good retention (> 6 years) and endurance (> 105) are observed in nanoscale amorphous silicon based RRAM (resistive random access memory). To successfully integrate the RRAM array, circuit models of the device characteristics and effects of device configuration such as crosstalk between...
A new method to reduce the numerical dispersion of the conventional alternating-direction-implicit finite-difference time-domain (ADI-FDTD) method is proposed. Firstly, the numerical formulations are modified with the artificial anisotropy, and the numerical dispersion relation is derived. Secondly, the relative permittivity tensor of the artificial anisotropy can be obtained by the micro-genetic...
In this paper, a new control strategy of stator-flux orientation for flux-switching permanent magnet (FSPM) motor based on voltage space-vector is proposed. The fundamental relationship and equalization between the two magnetic fields where the magnets are in the stator and rotor, respectively, are analyzed. The space-vector pulse-width modulation technique is applied to the FSPM motor drive in which...
With the advent of next generation communication infrastructure where Internet and telecommunication network could work together to provide converged services like (messaging, presence and call control), location-based services requires not only flexible and scalable middleware that supports three LBS service models: pull, poll and push, but also advanced converged service platform that supports LBS...
One of the features in JPEG2000 is ROI (region of interest) coding technique. Since the shape of interested region is manually optional in the coding process, the disturbance of uninterested regions to the retrieval process could be controlled to be very small if we retrieve images based on ROI content. This paper presents a novel and effective scheme for remote sensing image retrieval, which does...
XML provides flexible, extensible data models and type systems for structured data, and has found wide-acceptance in many domains. XML processing can be slow, however, especially for scientific data, thus leading to the conventional wisdom that XML is not appropriate for such data. Instead, data is stored in specialized binary formats, and is transmitted via work-arounds such as attachments and base64...
Estimating the optimal number of clusters for a dataset is one of the most essential issues in cluster analysis. An improper preselection for the number of clusters might easily lead to bad clustering outcome. In this paper, we propose a new evolutionary algorithm to address this issue. Specifically, the proposed evolutionary algorithm defines a new entropy-based fitness function, and three new genetic...
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