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Multi-station inverse synthetic aperture radar (MS-ISAR) imaging mode for on-orbit space target is presented. The MS-ISAR network produces bistatic ISAR images from different radar systems in different locations, and may retrieve more information of on-orbit space target, especially, for applications of target detection and recognition, as well as three dimensional (3-D) reconstruction. Numerical...
POLSAR image factorization is proposed as an extension of polarimetric SAR incoherent target decomposition. It simultaneously estimates a dictionary of meaningful atom scatterers and their corresponding spatial distribution maps from POLSAR image. Both model-based and eigenanalysis-based decompositions can be seen as special cases of image factorization under specific constraints. It can be solved...
Compared to quad polarimetry (quad-pol), compact polarimetry (compact-pol) can reduce the system complexity and data volume but sacrifice the retrievable information content. Reconstruction of pseudo quad-pol data from compact-pol has been proposed mostly based on iterative algorithms which make use of the empirically parameterized model with the assumption of reflection symmetry. In this paper, a...
China's Internet has been over 30 years of development, but there are still many problems. According to China's 2011–2015 correlation data, the evaluation index system of internet gaps established. A clustering is on the current situation of the development of Internet of China's 31 provinces and regions. The digital divide phenomenon focus on Internet development indicators measuring is obvious in...
Detecting near-duplicate documents efficiently is an indispensable capability for many applications, such as searching engines, information retrieval systems, and recommendation systems. In this paper, we propose a novel content presentation method for near-duplicate document detection from a large collection of Chinese documents. The proposed method, called multi-aggregation fingerprint (MAF), consists...
This paper proposes a saliency detection approach using multi-mapping based on global-local structural information. Firstly, a global-background-suppression(GBS) image and a Lab color space hybrid(CSH) image are obtained through different mapping rules. Secondly, both of them are segmented several times to produce multiple shape images. Thirdly, the above shape images are multiplied with GBS image...
In the VDFLL, the ranging errors will degrade the positioning accuracy as well as the tracking performances. In the paper, a new VDFLL tracking loop minimizing the ranging error by utilizing precise satellite orbit/clock and ionospheric products has been proposed. Unlike the conventional VDFLL, which treats all the measurement errors as zero-mean Gaussian noise with a high variance, the new VDFLL...
In this paper, it firstly establishes the assessment contents on uncertainty of multi-scale representation of point cluster around the process of multi-scale representation of point cluster and its spatial analysis, which includes positional uncertainty and uncertainty of spatial analysis conclusions; the assessment index K and the quantitative model of positional uncertainty related to point cluster...
As market competition continues to intensify, more and more enterprises have empowered their own salespeople. And managers in enterprises are more concerned with the issues how they determine whether salespeople in enterprises suit to be empowered and how they evaluate salespeoplepsilas empowerment readiness. This paper establishes index system of salespeoplepsilas empowerment readiness in enterprises,...
Based on a 1 km Chinese land cover product and a 1 km Chinese vegetation NPP product using MODIS, we have calculated some Chinese grassland productivity indexes of the year 2001. The results match the actual distribution of Chinese grassland productivity well.
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