Xie X.,Guilin University of Electronic Technology
Optics Express | Year: 2016
A fresh phase unwrapping algorithm based on iterated unscented Kalman filter is proposed to estimate unambiguous unwrapped phase of interferometric fringes. This method is the result of combining an iterated unscented Kalman filter with a robust phase gradient estimator based on amended matrix pencil model, and an efficient quality-guided strategy based on heap sort. The iterated unscented Kalman filter that is one of the most robust methods under the Bayesian theorem frame in non-linear signal processing so far, is applied to perform simultaneously noise suppression and phase unwrapping of interferometric fringes for the first time, which can simplify the complexity and the difficulty of pre-filtering procedure followed by phase unwrapping procedure, and even can remove the pre-filtering procedure. The robust phase gradient estimator is used to efficiently and accurately obtain phase gradient information from interferometric fringes, which is needed for the iterated unscented Kalman filtering phase unwrapping model. The efficient quality-guided strategy is able to ensure that the proposed method fast unwraps wrapped pixels along the path from the high-quality area to the low-quality area of wrapped phase images, which can greatly improve the efficiency of phase unwrapping. Results obtained from synthetic data and real data show that the proposed method can obtain better solutions with an acceptable time consumption, with respect to some of the most used algorithms. © 2016 Optical Society of America.
Liu W.,Guilin University of Electronic Technology
2010 IEEE 11th International Conference on Computer-Aided Industrial Design and Conceptual Design, CAID and CD'2010 | Year: 2010
The thesis made a brief summary of the development process of the user interface. through the some examples,describe the disappearance of sense of entities and the arrival of natural user interface, and focuses on the seven typical characteristics of the natural interface. © 2010 IEEE.
Zou Y.,Guilin University of Electronic Technology
Advances in Space Research | Year: 2011
The occurrence of ionospheric scintillations with S4 ≥ 0.2 was studied using GPS measurements at Guilin, China (25.29°N, 110.33°E; geomagnetic: 15.04°N, 181.98°E), a station located near the northern crest of the equatorial anomaly. The results are presented for data collected from January 2009 to March 2010. The results show that nighttime amplitude scintillations only took place in February and March of the considered years, while daytime amplitude scintillations occurred in August and December of 2009. Nighttime amplitude scintillations, observed in the south of Guilin, always occurred with phase scintillations, TEC (Total Electron Content) depletions, and ROT (Rate Of change of TEC) fluctuations. However, TEC depletions and ROT fluctuations were weak during daytime amplitude scintillations, and daytime amplitude scintillations always took place simultaneously for most of the GPS satellites which appeared over Guilin in different azimuth directions. Ground-based GPS scintillation/TEC observations recorded at Guilin and signal-to-noise-ratio (SNR) measurements obtained from GPS-COSMIC radio occultation indicate that nighttime and daytime scintillations are very likely caused by ionospheric F region irregularities and sporadic E, respectively. Moreover, strong daytime amplitude scintillations may be associated with the plasma density enhancements in ionospheric E region caused by the Perseid and Geminid meteor shower activities. © 2010 COSPAR. Published by Elsevier Ltd. All rights reserved.
Peng Z.-Y.,Guilin University of Electronic Technology
International Journal of Computer Mathematics | Year: 2010
This paper is a matrix iterative method presented to compute the solutions of the matrix equation, AXB=C, with unknown matrix X ∈ S, where S is the constrained matrices set like symmetric, symmetric-R-symmetric and (R, S)-symmetric. By this iterative method, for any initial matrix X0 ∈ S, a solution X* can be obtained within finite iteration steps if exact arithmetics were used, and the solution X* with the minimum Frobenius norm can be obtained by choosing a special kind of initial matrix. The solution X̂, which is nearest to a given matrix X̃ in Frobenius norm, can be obtained by first finding the minimum Frobenius norm solution of a new compatible matrix equation. The numerical examples given here show that the iterative method proposed in this paper has faster convergence and higher accuracy than the iterative methods proposed in [G.-X. Huang, F. Yin, and K. Guo, An iterative method for the skew-symmetric solution and the optimal approximate solution of the matrix equation AXB=C, J. Comput. Appl. Math. 212 (2008), pp. 231-244; Y. Lei and A.-P. Liao, A minimal residual algorithm for the inconsistent matrix equation AXB=C over symmetric matrices, Appl. Math. Comput. 188 (2007), pp. 499-513; Z.-Y. Peng, An iterative method for the least squares symmetric solution of the linear matrix equation AXB=C, Appl. Math. Comput. 170 (2005), pp. 711-723; Y.-X. Peng, X.-Y. Hu, and L. Zhang, An iteration method for the symmetric solutions and the optimal approximation solution of the matrix equation AXB=C, Appl. Math. Comput. 160 (2005), pp. 763-777]. © 2010 Taylor & Francis.
Wang Z.,Guilin University of Electronic Technology
Journal of Alloys and Compounds | Year: 2013
Different electrochemical measurements such as activation and maximum capacity, cyclic stability, selfdischarge property, high-rate dischargeability and electrochemical impedance spectroscopy have been carried out to investigate the electrochemical performances of LaNi4.4-xCo0.3Mn 0.3Alx hydrogen storage alloys at low and high temperatures. We have selected 273 K and 323 K as low and high temperatures respectively. Samples W, X, Y and Z were used to represent alloys LaNi 4.4Co0.3Mn0.3, LaNi4.3Co 0.3Mn0.3Al0.1, LaNi4.2Co 0.3Mn0.3Al0.2 and LaNi4.1Co 0.3Mn0.3Al0.3. XRD patterns show the alloys are all single-phase alloys with hexagonal CaCu5 type structure. The highest maximum discharge capacity is 340.3 mA h/g for alloy X, which is higher than other alloys at same temperature and high temperature. After 50 charge/discharge cycles, capacity retention of 93.6% has been observed at low temperature for alloy Z. The least capacity loss was 13.3% at 273 K during the self-discharge test. At both studied temperatures, alloy Z has the highest high-rate dischargeability (HRD) of 56.6% and 44.9% respectively at a discharge current density of 1800 mA/g. The electrochemical impedance spectroscopy (EIS) analysis was carried out to determine the charge-transfer resistance (R ct) which was further used in the analysis of the HRD. Alloy Z with the highest HRD at 273 K has a lower Rct of 0.9272 mΩ due to the dissolution or presence of Al into the electrolyte which can effectively reduce the total resistance of alloys. Apparently, at the two different testing temperatures, all the alloys possess better electrochemical properties at 273 K than 323 K. © 2013 Elsevier B.V. All rights reserved.
Liu H.,Guilin University of Electronic Technology
WIT Transactions on Engineering Sciences | Year: 2014
Informatization construction in the Vocational and Technical College of Guilin University of Electronic Technology as an example; analysis of the main problems of the Vocational and Technical College of Guilin University of Electronic Technology in the process of informationization construction; proposed realistic solution based on the main problems, discussed new ideas in digital campus construction with Guangxi vocational characteristics. © 2013 WIT Press.
Zhong J.,Guilin University of Electronic Technology
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2012
The traditional way to foster silkworm had many defects, such as inconvenient to use, easily lead to misoperation and probable to hazard silkworm by poison gas produced by coal stove. In the light of this situation, it was introduced to design a new temperature and humidity control system for common foster room based on LPC1111. The system used semiconductor refrigeration piece as a new cool and heat source which combined with moisture absorption characteristic of acrylic resin to realize simple dehumidification, and closed-loop control system by using temperature and humidity sensors was built. The design of temperature and humidity control and its specific hardware circuit and software process were introduced in the article. Test results showed that the maximum deviation of temperature was one degree Celsius, and the maximum deviation of humidity was six percent. Consequently, the live environmental requirements for young silkworm could be met by setting the temperature and humidity reasonably.
Chen H.,Guilin University of Electronic Technology
IEEE Sensors Journal | Year: 2010
The performance-energy tradeoffs for decentralized estimation in a multihop sensor network are studied. The sensor network consists of multiple heterogeneous branches. The leaf node on each branch observes a parameter corrupted by noise. Each leaf node quantizes its observation and sends the quantized data to the fusion center hop by hop. The parameter is estimated at the fusion center by using the best linear unbiased estimator. The performance is evaluated by adopting the MSE criterion. The total energy consumption in the sensor network is calculated. Network lifetime is defined and analyzed under per-sensor energy constraint. The tradeoff between performance and energy consumption as well as tradeoff between performance and network lifetime are investigated simultaneously. Optimization problems are formulated regarding both tradeoffs, and the conditions for optimization are identified for specific and generic sensor network deployments. The results demonstrate that both tradeoffs exist under given conditions. © 2010 IEEE.
Xie X.M.,Guilin University of Electronic Technology |
Li Y.H.,Guilin University of Electronic Technology
Applied Optics | Year: 2014
This paper presents an enhanced phase unwrapping algorithm by combining an unscented Kalman filter, an enhanced local phase gradient estimator based on an amended matrix pencil model, and a path-following strategy. This technology is able to accurately unwrap seriously noisy wrapped phase images by applying the unscented Kalman filter to simultaneously perform noise suppression and phase unwrapping along the path from the high-quality region to the low-quality region of the wrapped phase images. Results obtained with synthetic data and real data validate the effectiveness of the proposed method and show improved performance of this new algorithm with respect to some of the most used algorithms. © 2014 Optical Society of America.
Guilin Medicine Electronic Technology Co. and Guilin University of Electronic Technology | Date: 2015-11-02
The present invention discloses a non-invasive blood glucose measurement method, applied to noninvasive blood glucose measuring instruments including measuring hosts and fingertip measuring probes, comprising pre-storing a random forest algorithm and a neural network prediction algorithm in the measuring host; measuring energy metabolism parameters of a fingertip of an individual to be measured and transmitting the parameters to the measuring host by the fingertip measuring probe; calling the random forest algorithm to predict the blood glucose type of the energy metabolism parameters of the fingertip of the individual to be measured and calling the corresponding neural network prediction algorithm to calculate the blood glucose value of the fingertip of the individual to be measured by the measuring host. The present invention also provides a fingertip-measuring probe. The non-invasive blood glucose measurement method disclosed in the present invention can be applied to non-invasive measurement of blood glucose, parameters related to energy metabolism of human body, healthy parameters of angiocarpy, etc.