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Aiming at the problem that the existing GPRS monitoring system has no signal in some areas and the expensive price, an on-line monitoring system for transmission line based on 6LoWPAN technology is proposed. 6LoWPAN technology has built a bridge for communication between the wireless sensor and the Internet for the system, and achieved data collection, analysis to the transmission line temperature,...
The multiple bioactive constituents in Hedyotis diffusa Willd. (H. diffusa) were extracted and characterized by high‐performance liquid chromatography/electrospray ionization tandem mass spectrometry (HPLC‐ESI‐MSn). The optimized separation condition was obtained using an Agilent ZorBax SB‐C18 column (4.6×150 mm, 5 μm) and gradient elution with water (containing 0.1% formic acid) and acetonitrile...
In the light of semantic security issue in H.264 video, a strategy of video semantic authentication method based on UCL (Uniform Content Locator) is proposed. In this strategy, UCL information are embedded as semantic watermarks into the medium frequency range of DCT coefficients of I frames and semantic feature information are embedded into motion vectors of P frames. The strategy is implemented...
Because of the perturbations and disturbances of electro-hydraulic servo systems, the normal controller can't obtain good output responses under various conditions. The sliding mode control (SMC) based on fuzzy logic was presented for the system, and this approach can adjust parameters of reaching law at real time. Simulation results show that the improved system has nice robustness, and it is not...
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