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Bending loss of polymer optical fibers (POFs) shows unexpected oscillatory behaviors due to the interference between whispering gallery mode and core mode for the cases of small bending radius and large bending angle. We have found a novel method of suppressing the oscillatory behavior of bending loss of POFs. By partially removing the cladding and core, the bending loss monotonicity with improved...
This paper presents a power adaptivedigital predistortion (DPD) technique that enables DPD to automatically adjust its coefficients to adapt to the power amplifier behavior changes caused by the adjustmentsof the input power levels without re-calibration. Experimental results showed that the proposed method can produce excellent performance with very low complexity compared to the conventional approaches.
The paper takes the typical Karst-Phreatic in the north of China-Dawu Water Source as an example, and the risk assessment of groundwater pollution is conducted by using the Overlay and Index method. Unsaturated zone media, net recharge, rich water property of aquifer and depth to groundwater table are chose as the intrinsic vulnerability indexes, and types of land use, sources of pollutants and extent...
Firstly this article analyses the factors of SWOT impact for the railway freight business performance; and then we calculate the weight of each factor which is identified by four dimensions in the BSC decomposition and AHP analysis; TOPSIS is used to make the horizontal comparison of different companies with AHP the weight and get the final ranking of enterprise. Research shows that: Research result...
Tourism has become a new industry of China. Scenic spot customer satisfaction degree plays a very important role in the development of tourism industry. How to measure tourists' satisfaction degree with scientific method? Through analyzing the characteristics of tourism products, the method of gray correlation analysis was selected. The first, the theory of the method was introduced. The second, the...
Nowadays, getting on line via cell phones is becoming an essential Internet information retrieval tool in digital information space which makes the new era of mobile Internet rapidly develops. On the basis of chemical formula naming specification, the custom-built user profile and the automatic user profile are combined to a new technology approach, which is called optimized intelligent query algorithm...
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