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How to excite a rogue wave

Rogue waves are one of those fascinating destructive phenomena in nature that have not been fully explained so far 1–3 . There is a variety of approaches to deal with rogue waves 4,5 . Oceanographers commonly agree that linear theories cannot provide explanations for their existence 6,7 . Only nonlinear theories can explain the dramatic concentration of energy into a single “wall of water” well...

How to excite the internal modes of sine-Gordon solitons

We investigate the dynamics of the sine-Gordon solitons perturbed by spatiotemporal external forces. We prove the existence of internal (shape) modes of sine-Gordon solitons when they are in the presence of inhomogeneous space-dependent external forces, provided some conditions (for these forces) hold. Additional periodic timedependent forces can sustain oscillations of the soliton width. We sh...

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Research on How to Design an Android-based RFID Reader

Android is a very popular system in Chinese mobile phone market, while radio frequency identification device (RFID) which is originally used in fields of retail and logistics etc., is going to be installed into Android to realize the visualization of commodity information (including the updating, discounting, and after-sale service) and the general use for publics. This study firstly discussed ...

How to Contract Ontologies Statement of Interest

The dynamic nature of knowledge development has motivated the formal study of ontology evolution problems. In this paper, we study ontology contraction—the problem of retracting information that is no longer considered to hold. Our prime interest is to focus on ontologies expressed in Description Logics DL-Lite and EL, which underpin the OWL 2 QL and OWL 2 EL profiles. Our goal is to understand...