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With the acceleration of China's modernization, soil erosion caused by illegal activities in production and construction projects is becoming serious. Timely and effective monitoring and supervision is necessary. Traditional monitoring methods have many shortcomings, such as long period, limited precision, limited terrain. So it can't demonstrate the real situation of the project construction area...
The risk assessment of power network is beneficial to improve the reliability of power system. It only considers the condition of the equipment itself in conventional power network risk assessment methods, but lacks of a consideration of the various influence factors in the network. A comprehensive risk assessment method based on Equipment Condition and entropy is proposed to evaluate power network...
Bidirectional Reflectance Distribution Function (BRDF) describes the anisotropic distribution of surface reflectance. Bidirectional Reflectance Factor (BRF) is an alternative parameter to BRDF and is measurable while BRDF is only a theoretical concept. Land surface albedo plays a crucial role in climate and biosphere modeling. Paddy rice is a special crop type which grows in the water flooded environment...
Remote sensing is an important technology in the field of drought monitoring. Most traditional methods by remote sensing construct relationship between image features and land real data. Usually the models are complicated and the parameters are difficult to confirm. The surface water directly influence the irrigation and drinking, so monitoring water area changing can reflect drought situation. In...
Generation expansion planning (GEP), which integrates various environmental constraints under low-carbon economy, is a challenging problem due to its complexity. In this paper, different carbon intensity indexes are introduced to simplify the GEP problem. Marginal carbon intensity (MCI) and footprint carbon intensity (FCI) are mathematically formulated, and their corresponding GEP methods are provided...
In imaging process of digital cameras, digital number (DN) of images is often automatically compensated for effectiveness of human vision. In this study, DN correction based on gamma transformation theory is combined with a look-up table method to convert the output DN into a calibrated digital number (cDN). Then, the leaf area index (LAI) of paddy rice is estimated from gap fraction measurement in...
Due to complex subsurface situation, echo signals surveyed with Ground Penetration Radar (GPR) often contain a lot of clutters, including direct-coupling wave, random noises and multiples. Existence of these clutters submerges measured feature signals of rock structures with GPR, so suppression of them is often essential conduct for rock feature extraction. For extracting rockmass structure features...
This paper studies the usability of the subway control center by analyzing the dispatch facilities, non-dispatch facilities, and the software applied. At first, an evaluation architecture for all these facilities has been proposed. Then the Logic Scoring Preference (LSP) method has been used for implementing the evaluation. Finally, a survey for the usability of a dispatching centre in Beijing using...
A fiber sensing head based on an FBG concatenated with an LPG is proposed with the advantages of simplicity and easy fabrication for applying in index sensing systems.
The R*-tree, as a state-of-the-art spatial index, has already been applied in many fields. But in high-dimensional space its performance is not better than sequential scan algorithm. To solve time-series retrieval problem, we introduce a new index structure - Hierarchical Index Tree. Each time-series of database is divided into several segments with same length, each segment of which corresponds to...
The new control algorithm combining LQG and Fuzzy logic controller (LFLC) adapted to vehicle speed and road conditions is proposed to compromise the classical suspension conflict between ride comfort, handling and packaging requirements. Tracking the signals of the suspension working space and body acceleration that vary sharply with the variation of road conditions and vehicle speed, LFLC can regulate...
In order to improve the recall of search results and calculate file relevancy in P2P sharing systems, a file clustering algorithm using self-organized k-means method was proposed, which is based on the hierarchical structure of file sharing directories and file names' implication of classification. With uploaded file path information built into the indexes, a tree-structure like vector space model...
Test data generation is one of the important tasks during software testing. This paper proposes an approach to generating test cases automatically for the unit test of C programs with derived types including pointers, structures and arrays. Our approach combines symbolic execution and concrete execution. The approach captures operations on variables precisely by concrete execution, and thus it is...
In this paper, we present a novel energy-based model to describe human motion. According to biomechanics attribute of human body, we define kinetic and potential energy for each joint, upon which we convert the trajectory-based description of human motion into multi-dimensional energy series. As Dynamic Time Warping (DTW) distance is used to measure the similarity of motions, we employ an index for...
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