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The bismuth triborate crystals BiB3O6 (BIBO) are multifunctional crystal materials with noncentrosymetric characteristics. In this paper, single crystal growth of BIBO crystals by using the top seeded solution method in a short period (within one month) was reported and the determination of the dielectric, elastic and piezoelectric constants were discussed for potential piezoelectric applications...
FEM software has been well-developed in shock wave simulation. As the software usually is huge and complicated, subdivision mesh needs lots of computation, and the precision is not assured, finite-difference methods are highly regarded. Difference schemes are related to the stability and precision. In this paper, a Lax-Friedrichs based difference method is presented. Different grids were discussed...
As a new method for power line inspection, unmanned aerial vehicle (UAV)-based inspection is efficient and low-cost. Since the flight speed of UAV is fast, target auto-tracking and photographing of the airborne equipments including visual-light camera, infrared thermal imager and ultraviolet imager, is a very important and useful function. In this work, a power line inspection system suitable for...
EM-PTS algorithm (electromagnetism-like partial transmit sequences) can effectively reduce the PAPR (peak-to-average power ratio) of the OFDM (orthogonal frequency-division multiplexing) signal, however, it requires local search to gather the neighborhood information for the sampled particles, which increases the computational complexity of EM-PTS algorithm. In this paper, we propose a novel EM-PTS...
In content-based image retrieval systems, the invariance to geometrical transformations is one of the most desired properties. In this paper, a kind of rotation, scaling and translation (RST) invariant feature for image retrieval is investigated, and a new method is proposed to extract this type of feature. The proposed scheme first detects the scale invariant key points in images, and then utilizes...
To acquire information of the invisible underground infrastructure, non-destructive subsurface imaging technologies are generally utilized. In construction, the recorded data of as-built pile excavation is archived in Koden test result sheets. The test result is in the form of literal document and identified by the pile numbering. The graphical presentation of the test result may provide a clearer...
Based on analysis of matter-element theory applied in water quality assessment, enterprise competitiveness evaluation, human resource evaluation, and power quality evaluation, this paper put the theory into electricity services management and constructed an electricity supply service quality evaluation index system for the matter-element analysis model with combination of relevant research results...
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