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The integrated avionics system is a platform that integrates a series of flexible, reusable, interoperable hardware and software resources. It enables to implement the decoupled isolation of task software and physical resources under the premise of versatility of hardware resources and configuration of system applications, which can meet the requirements of software system updates and task changes...
Subharmonic imaging (i.e., receiving signal at half the transmitting frequency) is a promising technique to detect ultrasound contrast agents in the circulation. The aim of this study was to characterize the subharmonic enhancement of four new microbubble formulations (MBF-1 to 4), compared with three commercially-available contrast agents (Definity, Sonazoid and SonoVue), and to compare this subharmonic...
The explosion of network bandwidth poses greatchallenges to data-plane flow processing. Due to the variable andpoor worst-case performance, naive hash table is incapable ofwire-speed processing. State-of-the-art schemes rely on multiplehash functions for enhanced load balancing to improve the worst-case performance. These schemes exploit the memory hierarchyand allocate compact on-chip data structures...
Live virtual machine migration has become a core system management tool to achieve load balancing and power saving among different servers. The recent studies mainly focus on the performance improvement for live VM migration. However, there has been little attention on the migration's impact on VMs co-located both source and destination servers during the migration. The impact, which is mainly caused...
Most modern scientific research requires significant advanced modeling, simulation, and visualization. Due to the growing complexity of physical models, these research activities increasingly are requiring more and more High Performance Computing (HPC) resources and this trend is predicted to grow even stronger. Considering this growth in HPC applications, the traditional parallel computing model...
In social swarming applications, participants equipped with 3G and WiFi-capable smart phones are tasked to provide reports (possibly voluminous ones that include full-motion video) about their immediate environment to a central coordinator. In this paper, we consider the problem of timely delivery of these reports: each report has an associated deadline and the goal of the system is to retrieve as...
One of main feature of next generation of mobile networks is an integration of existing cellular systems with other wireless access technologies. In order to realize a seamless vertical handover (inter-RAT handover) among these different access technologies, a multi-interfaced mobile station is expected to communicate simultaneously on various network interfaces (i.e. to be multihomed) to achieve...
A single layer, single-feed circularly polarized (CP) microstrip antenna designed with four slits equally spaced and inset at the boundary of the circular patch for Beidou (COMPASS) Navigation System is proposed. The experimental results shown that by simply tuning the lengths of the slotted pairs, two orthogonal near-degenerate resonant modes for CP radiation can be excited. The measured impedance...
Circularly polarized(CP) square microstrip antenna used in Beidou RDSS is proposed and discussed in this paper. Four slits and two truncated corners were cut out from the patch. Via a coaxial probe feeding at an appropriate position, right-hand circularly polarization(RHCP) operation is achieved at 2.492 GHz with a 10 dB impedance bandwidth of about 40 MHz and 3 dB axial bandwidth of about 10 MHz...
In this paper, a new difference scheme by using cubic splines for solving a singularly-perturbed two-point boundary-value problem for second-order ordinary differential equations is derived. The proposed scheme is fourth order accurate, which is better than previous published results. Finally, two numerical examples are solved to illustrate the efficiency of our method.
Meeting the future requirements of higher bandwidth while providing ever more complex functions, future network processors will require a number of methods of improving processing performance. One such method will involve deeper processor pipelines to obtain higher operating frequencies. Mitigation of the penalty costs associated with deeper pipelines have achieved by implementing prediction schemes,...
Caching mechanism has achieved great success in general purpose processor; however, its deployment in Network Processor (NP) raises questions over its effectiveness under the new context. In this study, we thoroughly evaluate the performance of caches in NP with architectural features like multicore, multithread, and integrated packet interface. Our major findings include: (1) In general, a sufficiently...
The system architecture cannot adapt to the dynamic change of system disks, which is a general problem in traditional storage system. While EvoRAID system, a dynamic storage system we proposed, applies DAA algorithm to cope with three kinds of storage system disk changes—homogeneous disk adding, heterogeneous disk adding, and heterogeneous disk replacement. Simulation results demonstrate that without...
A detailed study of the nonlinearity and the spurious free dynamic range (SFDR) of a traveling-wave electroabsorption modulator is presented. A SFDR as high as 128dB-Hz/sup 4/5/achieved at 10 GHz.
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