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When running data intensive scientific workflow in multiple data centers environment, it is inevitable that massive data movement will be caused. The emergence of cloud computing technologies offers a new way to develop scientific workflow systems, and using dataset replicas to reduce data transfer among data centers is an import issue. In this paper, we propose a group based genetic algorithm which...
As the 3D stacking technology still faces several challenges, the 2.5D stacking technology gains better application prospects nowadays. With the silicon interposer, the 2.5D stacking can improve the bandwidth and capacity of the memory system. To satisfy the communication requirements of the integrated memory system, the free routing resources in the interposer should be explored to implement an additional...
To achieve high throughput, core count in compute accelerators such as General-Purpose Graphics Processing Units (GPGPUs) increases continuously. The communication demand of these cores boosts the demand for a low-latency packet switched network. As packet latency is mainly composed of per-hop latency, contention latency and serialization latency, a favorable Network-on-Chip (NoC) design should efficiently...
As the GPS signal simulator is applied more and more extensively, the test equipment of the GPS signal simulator is required higher and higher. Currently, the calibration using the standard instrument is the most important means, which severely restricts the test environment of the simulator. In order to meet the test requirements of the GPS signal simulator for diversified situation, this paper proposes...
Increasingly, software defined radio receivers adopting band sampling are widely applied in space mission. In such systems, particularly in spread-spectrum ranging systems, the influence of sampling noise can not be neglected. The paper analyzes the sampling noise, presents its influence on the carrier noise ratio, and derives the ranging error by calculating the synchronization error of the delay...
The digital close-loop Quartz Flex accelerometer (DCL-QFA) technology is proposed in this paper, which is different from the analog close-loop circuit. The DCL-QFA can output the digital data of acceleration directly without the analog-digital converting circuit, acquiring higher measuring accuracy, realizing the arithmetic of high performance much more easier. In this paper, the principal of DCL-QFA...
This work presents a low-complexity IR-UWB chipset which achieves synchronization and demodulation at the receiver relying only on a ring oscillator clock. The modulation scheme used, synchronized-OOK (S-OOK), permits low power timing acquisition and data reception with a static CMOS digital synchronizer and demodulator counting 61 logic elements. The receiver consists of a modified energy detector...
In order to improve the rate of bandwidth utilization and achieve dynamic bandwidth allocation, in this paper, the video stream predication model of Kalman filter is improved according to linear prediction of future frames. The Kalman filtering owns a minimum mean square error estimate when the observed variables and noise are jointly Gaussian noise. Noise reduction is applied, and then the technology...
The feed part which uses gradually changing structure usually has wider impedance bandwidth. A kind of trapezoid dipole antenna that is similar to the parallel dual-feed is analyzed in the essay. Adopting the software of CST Microwave to simulate how the structure parameter of antenna influences impedance character, a type of dipole antenna working within 1.85~3.75GHz is designed. The simulation results...
Speed and precision are important for object detection algorithms. In this paper, a novel object detection algorithm based on color histogram and adaptive bandwidth mean shift is proposed. The algorithm is capable of detecting objects rapidly and precisely. It is composed of two stages: a rough detection stage and a precise detection stage. At the rough detection stage, histogram back projection and...
This paper reviews system level considerations for the design of Ultra Low-Power Radio (ULP radio) transceivers with the capability to operate at short distances (∼1m) with a data rate of 1 Mbit/s and with a very low power consumption (∼1mW); the target application is a Sensor Node (SN). It is shown that under practical constraints an Ultra-Wide-Band impulse radio architecture (UWB-IR) is more power...
As the demand of high power system reliability, condition based maintenance (CBM) becomes a better solution for maintaining equipment reliability. According to the diagnostics of CBM, one can estimate the condition of insulator, and find an optima strategy. Among them, on-line partial discharge measurement is one of the most important diagnostics assessing the condition of insulator. However, the...
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