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Location-based social networks (LBSNs) are attracting significant attentions, which make location-aware applications prosperous. We proposed the Multiple User-defined Spatial Query (MUSQ) in [1]. However, it is impractical that non-expert users provide exact vectors to denote their preferences in MUSQ. In this paper, we design a group users weight matrix generation algorithm to represent users' preferences...
Monthly methane concentration (CH4) level over Zoige alpine wetland, China from October of 2002 to December of 2006 was analyzed based on the SCIAMACHY data. The level was low and might decrease from January to March then increase until August (except for 2006), and then decreased until fall or early winter. The linkage of the CH4, air temperature, precipitation, and soil temperature and moisture...
A new four component decomposition algorithm for urban targets delineation from PolSAR imagery was studied. First, a new correlation coefficient was introduced to describe characteristics of urban targets. The coefficient was the linear combination of two elements of a coherent matrix. Then, the coefficient was used to modify the volumetric scattering model component in Yamaguchi et al.'s four-component...
Dynamic texture describes images sequence that continuously demonstrates movement of pixels intensity change patterns in time, for example, smoke, fire, waterfall, sea-waves, foliage, traffic on highway and so on. Motion coherence analysis on dynamic textures is usually observed through their motion vector fields. We implement strategic motion coherence analysis to evaluate the coherent motion on...
Motion coherence index is a metric to evaluate the coherent motion among vectors. In this article, we propose a coherent motion indicator to describe coherent motion among four adjacent vectors. For the preliminary investigation on stationarity of dynamic texture, the coherent motion indicator is proposed as an attribute of vector. The coherent motion indicator is calculated by averaging the angular...
The previous studies of real-time imaging process using directly delay calculation design on FPGA, because the limited number of memory on chip. In this paper, to achieve higher frequency, a look-up table which carries the distance information has been introduced in. As the operation frequency of memory on Field-programmable gate array (FPGA) can reach to as high as 400MHz, which is much higher than...
This paper reports a hypergraph model for online social networks with an emphasis on the node preference. Some improvements of the model are made in the present study. First, the inherent nodes properties and their links are utilized in the proposed evaluation model. Second, the proposed model contains a topology potential value of node, which is based on cognitive data field in physics. In the calculation...
In 3D-HEVC, a new coding standard of 3D video, Explicit Wedgelet mode within Depth Modelling Modes (DMM) partitions a depth block into two non-rectangular regions using a Wedgelet pattern selected from a Wedgelet lookup table. The Wedgelet lookup table is constructed during both encoder and decoder initialization for each block size ranging from 4×4 to 16×16, while the Wedgelet lookup table consists...
Recently, using web search data to predict public health trends and economical indicators, like consumption, unemployment, tourism is arising more and more researchers interest. Based on the thought that web search data could reflect searchers' attention and concern, we study the correlation between housing price index and web search data, then make a comparative analysis of two regions with different...
Random missing observations in real-world inverse synthetic aperture radar (ISAR) imaging may appear due to the instability of the radar system. Under this circumstance, the signal of one range bin over the slow-time has limited samples. Using traditional range-Doppler algorithm, high-quality ISAR images for random missing observations cannot be obtained. Recently, a new non-iterative algorithm based...
Transformer online operation state directly influences the operation state of the whole power system. A transformer online operation state assessment method is proposed in this paper. This method is based on history, real-time, future operation data of transformer, and five evaluation models for device, maintenance, state, operation, and plan are established. Six category twenty-five sub-index es...
Discretization serves as an important preprocessing step for analyzing gene expression data and many algorithms have been proposed. However, most of the discretization methods were designed for microarrays. As a new technology, digital gene expression (DGE) profiles can overcome the limitation of microarrays and were applied in a widely range. In this paper, we proposed a novel discretization method...
Taking the example of Wrist-Ankle Acupuncture teaching in Chinese Medicine, it is analyzed in details that how to apply virtual reality (VR) technology into the medical experimental instruction. A medical virtual teaching system is constructed and its functions, design of main modules as well as choices of teaching media are introduced. Moreover, the most important techniques during the course of...
In the context of Condition Based Maintenance (CBM), this paper presents a risk-based optimization model for system maintenance scheduling problem. It consists on optimizing availability and cost of the system by balancing between system maintenance risk and failure risk. In this paper, system reliability constraint is considered. Reliability of system components is characterized by their failure...
A novel approach to estimate localizability for mobile robots is presented based on probabilistic grid map (PGM). Firstly, a static localizability matrix is proposed for off-line estimation over the priori PGM. Then a dynamic localizability matrix is proposed to deal with unexpected dynamic changes. These matrices describe both localizability index and localizability direction quantitatively. The...
This paper proposes a service restoration algorithm considered with priority customers and Distributed Generation (DG). By establishing an index of service restoration rate considering load grade, the power supply to the priority customers is ensured. Taking advantage of DG with regard to the service restoration in distribution networks, when the grid does not have enough capacity to restore the entire...
Based on the large-scale distributed application supporting mobile component for adapting available resource , a fault-tolerance framework was proposed. Improved index-based quasi-synchronous checkpoint algorithm by shadow chain and notebook mechanisms, that system can take checkpoints at the lower price and was rollbacked to a latest global consistent state. Tested experimentation prototype, that...
In this paper, the author attempted to study on the land use of Changping District (2005 and 2008) with spatial data mining through geo-statistics method, and explored new method for land use spatial data mining. The land use data (2005 and 2008) were divided into 1km×1km, 2km×2km, 4km×4km grid cells respectively. And use spatial autocorrelation to analysis the land use structure and its changes in...
In view of the disadvantages of core-stateless fair queuing fair active queue management algorithm based on hierarchical rate coding is proposed. In this method, the hierarchical rate coding in the compressed shared space of rate is pointed out to ensure more accurate rate max-min fairness. Effective punishment upon misbehaving flow with a full stateless method is imposed to improve the fairness of...
Based on the unascertained theory, the paper elaborated exhaustively the construction process of the unascertained measure model. Combined with the unascertained measure model, the factors affecting coal-mine safety are analyzed and evaluated. According to the reality of Bofang coal-mine safety management, we can collect the measured data, determine the safety evaluation index, calculate for example...
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