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Your search keyword '"X. K. Yang"' showing total 3 results
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3 results on '"X. K. Yang"'

1. Research on Distributed Attitude System Based on MEMS Inertial Sensor Network

Author

Gongmin Yan, Y. Deng, and X. K. Yang

Subjects
Microelectromechanical systems, Lever, Inertial frame of reference, business.product_category, 010504 meteorology & atmospheric sciences, Computer science, 010401 analytical chemistry, Installation Error, 01 natural sciences, 0104 chemical sciences, Multiple sensors, Order (business), Torque, business, Wireless sensor network, Simulation, 0105 earth and related environmental sciences
Abstract

Multiple sensors in distributed attitude systems can be installed in different parts of the carrier, providing more information and introducing errors. Compared with the traditional attitude system, the common error sources of distributed attitude system sensors are installation error and inner lever arm error. In order to improve this problem, the installation error and inertial lever errors of distributed attitude system are analyzed and modeled. Simulation results are given. The results show that the installation error and the inner lever arm error have a great influence on the accuracy, which must be paid attention to in the practical application.

Published
2020

2. Short-wavelength Spin Wave excitation utilizing external magnetic field

Author

H. Q. Cui, C. W. Feng, B. Wei, J. Li, Minxuan Zhang, X. K. Yang, J. H. Liu, and Y. B. Chen

Subjects
010302 applied physics, Physics, Condensed matter physics, Magnetic confinement fusion, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Magnetic field, Intensity (physics), Magnetization, Wavelength, Spin wave, 0103 physical sciences, 0210 nano-technology, Micromagnetics, Excitation
Abstract

Spin Wave (SW) has attracted great interest as information carrier in the past decades. Information transmission and processing between devices is achieved by collective precessional motion of magnetization without charge transfer, which enables lower energy consumption. In this paper, we perform several micromagnetic simulations to excite propagating spin wave and find that smaller external magnetic field can excite spin wave with shorter wavelength. A proper external magnetic(1800–2000mT) can excite spin wave with strong intensity for long-distance propagation. These findings will provide guideline in spin wave based logic devices design.

Published
2019

3. An Improved Motion-Compensated 3-D LLMMSE Filter With Spatio-Temporal Adaptive Filtering.

Author

Hai Bing Yin, Xiang Zhong Fang, Zhang Wei, and X. K. Yang

Subjects
RESEARCH, INFORMATION processing, DIGITAL images, PIXELS, QUALITATIVE research, ESTIMATION theory, ALGORITHMS, NOISE, INTERMITTENT-motion mechanisms
Abstract

In this paper, we propose a motion-compensated spatio-temporal Locally adaptive linear minimum mean squared-error (LLMMSE) filter for noisy image sequences with both temporal and spatially adaptive filtering support. Motion compensation and an adaptive temporal filtering support (TFS) structure guarantee the uniformity of the TFS. An intelligent pixel aggregation algorithm is proposed to include homogeneous neighboring pixels and exclude the outlier pixels, resulting in uniform spatial filtering support. By using the proposed spatio-temporal LLMMSE filter with uniform spatio-temporal support, we can reduce noise efficiently without introducing visually disturbing blurring artifacts. Furthermore, we employ an adaptive weighted local mean and variance estimation algorithm to improve the accuracy of estimation. The weights provide an implicit mechanism for deemphasizing the contribution of the outlier pixels which are wrongly kept within the support to avoid blurring. The performance of the proposed filter is quantitatively evaluated and compared with state-of-the-art methods. The results demonstrate that the proposed filter can achieve superior filtering performance, both subjectively and objectively. [ABSTRACT FROM AUTHOR]

Published
2007
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