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GPP (Gross Primary Productivity) is an important index to reflect the productivity of vegetation. The MODIS 8-day GPP time-series products in the study area were rebuilt using Savitzky-Golay filter from 2001 to 2012. After phenological parameters' variation was analyzed based on dynamic threshold method, the time series of GPP were analyzed in this paper. Correlation analysis between annual accumulated...
In hyperspectral image classification, jointly using the pixels in an image patch can generally improve the performance. Recently, a new hyperspectral image classification method, which is based on low-rank decomposition model, was proposed by Chen et al. Although this algorithm can achieve state-of-the-art performance and outperform many contemporary classification techniques by jointly classifying...
Nonlinear refractive dynamics of CS2 are measured with the beam deflection technique. A response function model is fit, from which the pulse width dependent n2,eff is calculated and compared to Z-scan measurements.
By analyzing features of DoS attacks in soft switch network, in this paper we propose a set of attack effect evaluation indices, which take both users and systems into consideration. A model combining SPA and fuzzy comprehensive judgment is designed to evaluate DoS attack effect. This model performs well in evaluating attack without deterministic evaluation indices, and it can not only provide evaluation...
In keyword search over relational databases (KSORD), retrieval of user's initial query is often unsatisfying. User has to reformulate his query and execute the new query, which costs much time and effort. In this paper, a method of automatically reformulating user queries by relevance feedback is introduced, which is named VSM-RF. Aimed at the results of KSORD systems, VSM-RF adopts a ranking method...
The scale and distribution of electric multiple unit maintenance base are important to improve the efficiency and capacity of high-speed railway network, but it is less studied in previous papers. On the basis of studying foreign experiences of distribution of electric multiple unit maintenance base, and examination and repair method, the paper analyzes the characteristics and affecting factors of...
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