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41.
42.
Using tools from set-valued and variational analysis, we propose a mathematical formulation for a power DC-DC Buck converter.
We prove the existence of trajectories for the model. A stability and asymptotic stability results are established. The theoretical
results are supported by some numerical simulations with a discussion about explicit and implicit schemes. 相似文献
43.
BP neural network recognition algorithm for scour monitoring of subsea pipelines based on active thermometry 总被引:1,自引:0,他引:1
Scour monitoring is an important concern for subsea pipeline systems. The active-thermometry-based scour monitoring is based on the difference of heat transfer properties between sediment and sand, recognizes the surrounding media though temperature changing patterns during heating and cooling processes, and hence detects the free spans. Based on the scour monitoring system, a two-layer BP neural network was employed to process the monitoring data and achieved media recognition. The network's inputs were normalized temperature time histories. The network's outputs denoted different media: sediment and water. To validate the method, three experiments were conducted; one was used for training the network and the other two for testing. Also, the effect of noise on the network's performance was studied through simulation. The results demonstrated the feasibility and robustness of the neural network. 相似文献
44.
45.
Baíllo Amparo Cárcamo Javier Getman Konstantin 《Advances in Data Analysis and Classification》2019,13(2):531-557
Advances in Data Analysis and Classification - The classification of the X-ray sources into classes (such as extragalactic sources, background stars,...) is an essential task in astronomy.... 相似文献
46.
In this paper, we study the difference spaces \({\mathcal {F}}(\varDelta )\), \({\mathcal {F}}_0(\varDelta )\), \({\mathcal {[F]}}(\varDelta )\) and \({\mathcal {[F]}}_0(\varDelta )\) of double sequences obtained as the domain of four-dimensional backward difference matrix \(\varDelta \) in the spaces \({\mathcal {F}}\), \({\mathcal {F}}_{0}\), \({\mathcal {[F]}}\) and \({\mathcal {[F]}}_{0}\) of almost convergent, almost null, strongly almost convergent and strongly almost null double sequences; respectively. We examine general topological properties of those spaces and give some inclusion theorems. Furthermore, we deal with their dual spaces.
相似文献47.
Fırıncı Rukiye Fırıncı Erkan Başbülbül Gamze Dabanca Mustafa Berk Barut Celepci Duygu Günay M. Emin 《Transition Metal Chemistry》2019,44(4):391-397
Transition Metal Chemistry - Three 1,3-dimethylbarbiturate-enamine derivatives and their symmetrical palladium(II) complexes were prepared and characterized by spectroscopic methods. In addition,... 相似文献
48.
A weighted differential Hardy inequality is examined on the set of locally absolutely continuous functions vanishing at the endpoints of an interval. Some generalizations of the available results and sharper estimates for the best constant are obtained. 相似文献
49.