Yanyan Tan

Learn More
—The iterative Fourier technique (IFT) is a high efficiency method that was proposed in recent past for the synthesis of large planar thinned arrays with isotropic radiating elements. However, the selection mechanism of IFT cannot always include the most useful elements in the " turned ON " families, which make the method trap in some local minima.(More)
Students often possess multiple, conflicting misconceptions which may be activated and expressed in different contexts. In this paper, we use a mixed membership model to explore the patterns of misconceptions in introductory physics. Mixed membership models have been widely used for mod-eling observations that have partial membership in several latent(More)
The paper is about developing one type of the wheel engineering vehicle from manual control to remote control. It systematically analyzed the operating schematic of the hydraulic system which belongs to one type of the wheel engineering vehicle and the characterization of the manual control, as shown in Fig.1 and Fig.2. Overall plan of the electro-hydraulic(More)
A novel perceptual multiple description coding with randomly offset quantizers (PMDROQ) is proposed. In the proposed PMDROQ method, the input image is partitioned into M subsets, and then obtaining M descriptions. In each description, one subset is directly encoded and decoded with different-small perceptual quantization stepsizes in DCT domain, while other(More)
In order to well solve the phase-only reconfigurable arrays synthesis problems, we introduce an adaptive strategy in invasive weed optimization (IWO), and integrate the adaptive IWO (AIWO) into the framework of MOEA/D, a popular multi-objective algorithm. Then, a new version of MOEA/D with adaptive IWO, named MOEA/D-AIWO is proposed in this paper for(More)
  • 1