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This paper studied the zero-sequence current of the distribution network with DGs. By comparison analysis, DGs do not affect the zero-sequence current measured at the initial points of each feeder. The transient component of zero-sequence current contains abundant fault information. The algorithm decomposed zero-sequence current on four scales with wavelet function db4. Fault characteristic components...
(0.9−x)(Bi0.95La0.05)FeO3−xPbTiO3−0.1BaZrO3 (BLF-xPT-BZ) ceramics were synthesized by the conventional solid state reaction method. The X-ray diffraction (XRD) results reflected that phase transformation from rhombohedral (R) to tetragonal (T) took place with increasing the PT content, and the coexistence R and T phases were observed at x = 0.35. The dielectric constant (εr), dielectric loss (tanδ),...
In 20th century and in early 21st century, there were some massive earthquakes happened in China. Rapid and accurate estimation and assessment of casualties caused by earthquake is essential basis for government and administrators to initialize the appropriate level of emergent plan. In this paper, a casualty prediction system for earthquake based on geographic information system has been developed...
With the accelerated construction pace of the international traveling island, Hainan province will have another golden period of development and opportunity for its socio-economic since the establishment of Hainan. However, the protection of environmental resources is an important guarantee for building a sustainable development international traveling island. Currently, there are a variety of potential...
In order to effectively support formal representation and reuse of operation standard knowledge, a new operation standard expert system called OS expert system, has been developed based on the integration of ontology and case-based reasoning (CBR). This paper emphatically introduces operation standard ontology, case representation model, case retrieval model and case revision model. Through importing...
The modulation bandwidth enhancement and the chaos synchronization characteristics of feedback-induced chaos in strongly injection-locked semiconductor lasers are studied numerically by establishing the theoretical model. With extra external optical injection, the modulation bandwidth of a unidirectional close-loop chaos synchronization system is greatly enhanced about three times. The robustness...
A hybrid optimization algorithm about chaos search for fuzzy neural networks (FNN) is proposed in this paper. Off-line optimization uses chaos algorithm, chaotic variables are applied to searching for parameters of membership function and weights for FNN, and an approximate optimal FNN is found. On-line optimization used gradient descent algorithm, the original values of gradient descent searching...
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