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We propose an index of textural feature for oil spill segmentation based on X-band marine radar image. The radar image used in this paper were acquired on July 21, 2010, from the teaching-training ship, “YUKUN”, of Dalian Maritime University. Using adaptive median filter and Fields-of-Experts model, co-channel interference and small objects are cleaned separately. An index calculated by textural features...
Marine radar can be applied to detect oil spill targets in a large range, which cannot be affected by night, cloudy, rain, snow and other inclement weather. It has played an important role in the field of oil spill monitoring. Moreover, marine radar has the advantages of low cost and convenient installation, which is suitable for constructing marine oil spill network monitoring system. Taking marine...
This paper proposes a novel TRansformation Under STability-reTraining Equilibrium CHaracterization (Trust-Tech) enhanced methodology for the solar energy prediction. This novel method is an ensemble of Trust-Tech-enhanced, group-based genetic algorithm (GA)-assisted SVM predictors. Several distinguished features of the proposed method are as follows: Firstly, feature selection algorithm is used to...
Cyberspace is a complicated system of computer, network and other information environments. To evaluate its security defence ability, the offensive and defensive features in cyberspace were discussed in this paper, firstly. Then index system and evaluation model were proposed. Based on analytic hierarchy process method, cyberspace security defence system was decomposed from its ability aspect. Fuzzy...
Object storage system provides ocean space to hold a very large amount of data objects reliably and guarantee the clients to efficiently obtain their big data. In this paper, we propose a secure provable data possession scheme for object storage system, so as to enhance the security and efficiency through interactive verification and hierarchical structure optimizing. In particular, a new secure protection...
Rapid development of social network theory provides new perspective for the study of covert organizational behavior and becomes new research hot topic in the international academic circle. Conventional covert organization network research mainly involves interpersonal relationships among members and there are some limitations. Problems that need to be solved at present include introducing more elements...
Dimensional error often appears nonlinearly in Multi-axis CNC machining process. This paper analyzes the dimensional error variation for CNC grinding in detail, and introduces a new intelligent error pre-compensation algorithm to constitute intelligent error pre-compensation system. The simulation results of the intelligent error compensation system show the recovery is very fast, for either step...
With more and more attention paid to low-carbon economy, as a country with large carbon dioxide emissions, China attaches much importance to the development of low-carbon economy. Firstly, a low-carbon economy evaluation index system is established in this paper in order to fully reflect the comprehensive development of low-carbon economy. Then the Delphi method is used to determine the index layer...
The paper set up the comprehensive index system of low-carbon economy of the city. It applied for the rough set theory to preprocess the data, then reduced the attribute, and finally extracted the rules for comprehensively evaluating the specific operating condition of some typical cities in Shandong Province.
The aim of this study was to investigate the effects of thrombolytic therapy and delayed percutaneous coronary intervention (PCI) on the time constant of left ventricular (LV) isovolumic relaxation. Of 38 patients with acute myocardial infarction (AMI) recruited in the study, 26 patients (TL group) received intravenously thrombolytic therapy within 12 hours after the AMI event, and 12 patients (PCI...
Analysis of PIN diode's geometric effects on the performance of RF switches is presented with measured data. The impact of periphery-to-area ratio (P/A) is investigated in terms of forward bias resistance and linearity. Theoretical analysis shows the smaller periphery-to-area ratio of PIN diode can reduce not only the forward biased resistance, but also the power handling capability. In addition,...
This paper deal with the problem of direction-of-arrival (DOA) estimation with a polarization sensitive array. The proposed DOA estimation method is based on a sparse representation of polarization sensor measurements with an overcomplete basis composed of samples from the polarization sensitive array manifold. It enforces sparsity by ??1-norm to obtain a sharp amplitude estimate of the sparse solution...
In this paper, we present an ontology modeling tool for building Chinese domain ontology, which not only offers automatic acquisition knowledge from multiple dictionaries, but also corresponds with a dictionary-based ontology modeling methodology that combines methontology and throwaway prototype. By using a case study of spatial information science ontology modeling, the theoretical method and implementation...
The study aimed to investigate the effects of thrombolytic therapy and percutaneous coronary intervention (PCI) on the time constant of left ventricular (LV) isovolumic relaxation. Of 38 patients with acute myocardial infarction (AMI) recruited in the work, 26 patients (treated group) received intravenously thrombolytic therapy within 12 hours after the AMI event, and 12 patients (controlled group)...
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