The azimuth multichannel synthetic aperture radar (SAR) system is used in ground moving target indication (GMTI). But for Ka-band SAR, the conflicts between high gain and wide swath coverage are very strict. digital beamforming (DBF) scan-on-receive (SCORE) algorithm can solve this problem well. This letter introduces a SAR with three receiving antennas direction. For each antenna, eight subapertures arranged elevation direction order to obtain higher lower data rate through DBF-SCORE...

Cloud computing is increasingly becoming a popular solution to massive data analysis in life science community. To completely harness the power of computing, scientists need gateways efficiently manage their virtual machines, share resources, and run high-throughput sequence with bioinformatics software tools. This paper introduces development use Open Life Science Gateway, which manages computational jobs on top Hadoop streaming, supports user-customized runtime environment machine images....

Cloud computing is increasingly becoming a popular solution to massive data analysis in bioinformatics. In order enable scientists harness the power provided by platforms, we designed Green Pipe, scalable computational workflow system, which runs jobs as MapReduce tasks on virtual Hadoop clusters. This paper introduces power-aware scheduling algorithm engine optimize execution terms of running time and energy consumption. Experimental results demonstrate performance improvement Pipe.

Abstract Decimeter-level service is provided by the BeiDou satellite navigation system wide area differential (BDS WADS) for users who collect carrier phase measurements. However, fluctuations in Geostationary Earth Orbit (GEO) orbit errors reduce spatial correlation of errors. These not only decrease accuracy and stability zone correction BDS WADS, but also shorten its effective range. In this paper, we proposed an algorithm to weaken influence GEO error verified method using data from...

Network reliability is very important in our modern society. The primary network research focuses on connectivity reliability. Recently, performance receiving more and attention, concept promoted, such as travel time But it hard to evaluate it. One of the reasons high computational complexity. Although this problem also exists reliability, much worse because concerns capacity traffic multiple states. In order reduce complexity evaluation, a performance-reliability-preserving reduction method...

Cloud computing has become a widely used solution for efficiently provisioning computational and storage resources. Meanwhile, it is essential to provide customizable scientific data analytic platforms researchers conduct their personalized intensive analysis. The integration of analytics the potential improve resource utilization facilitate development researches. This paper proposes an automatic deployment framework deploying environments on Clouds every customized analytics. To achieve...

Millimeter wave is one of the development directions modern radar applications. With W-band components, W band Inverse Synthetic Aperture Radar (ISAR) system research has been a hot spot since it advantages high resolution and more information about scattering characteristics images. This paper introduces Frequency Modulated Continuous Wave (FMCW) operated at 94GHz provides bandwidth 5GHz. The performance index this discussed for ISAR FMCW mode echo model established signal processing...

Large scale networks, which are complex systems with huge number of nodes and links, difficult to evaluate reliability the existing theory algorithms, simulation test methods because high complexity. In practice, a simplified version network is always developed as basis for evaluation in order greatly decrease complexity analysis. Therefore, it great importance search potential influences on brought by simplification. BA classic scale-free model, best suitable describe topology many...

With the rapid development of integrated circuit manufacturing technology and radar technology, demand for miniaturisation, low power consumption, real‐time performance synthetic aperture (SAR) imaging system is becoming higher higher. By designing reconfigurable IP cores configuring parameters through CPU, a missile‐borne SAR SoC chip based on reuse designed to meet this urgent demand. Using 0.13μm CMOS process, has been taped out verified successfully. Compared with traditional ‘DSP +...

This paper studies a method to improve the measurement accuracy of in-orbit test (IOT) for Ka-band communication satellite payload. Since ground telemetry and command station this operates at low elevation, atmospheric attenuation fluctuation are much large. Due lack effective way separate influence attenuation, IOT processing has employ conventional many years, that is say, tests need choose sunny days supposed be fixed in situation. However, assumption degrades significantly performance...

In this paper we describe a non iterative approach to evaluate and compensate the phase errors of radar subsurface image, implement images based on MARSIS (Mars Advance Radar for Subsurface Ionosphere Sounding) data. The main idea is build relationship by error vector between unknown perfect image given phase-corrupted use no return area in as constraint condition or known solve out directly.

The Earth 2.0 (ET) mission is a Chinese next generation space designed to find thousands of terrestrial-like planets including habitable Earth-like orbiting solar type stars (Earth 2.0s) through the transiting method, and cold free-floating low-mass microlensing method. will monitor 1.2M FGKM dwarf for patterns transits with differential photometry precision 34 ppm G = 13.5 mag star in 6.5-hr exposure. ET be operated at Earth-Sun L2 halo orbit lifetime longer than 4 years. To increase...

Tunnelling works in the construction of metro lines often induce ground subsidence, thus damaging facilities and threatening people's lives. Interferometric Synthetic Aperture Radar (InSAR) has become an important monitoring method for deformation. In previous studies, time series InSAR techniques, represented by StaMPS (Stanford Method Persistent Scatterers), been successfully applied to measure millimeter level subsidence urban areas based on spaceborne SAR data stacks. However, several...