作者机构:
[刘泽民; 李梦醒] School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;[程恩; 黄龙杨] Laboratory of Underwater Acoustic Communication and Marine Information Technology, Ministry of Education, Fujian Xiamen 361005, China;[李梦醒] Department of Physics and Telecommunication Engineering, Hunan City University, Hunan Yiyang 413000, China
通讯机构:
[Li, M.-X.] S;School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, China
期刊:
SECOND INTERNATIONAL CONFERENCE ON COMPUTER AND ELECTRICAL ENGINEERING, VOL 2, PROCEEDINGS,2009年:109-111
通讯作者:
Zhou Cuihong
作者机构:
[Yang Gelan; Zhou Cuihong] Hunan City Univ, Dept Comp Sci, Yiyang 413000, Hunan, Peoples R China.
通讯机构:
[Zhou Cuihong] H;Hunan City Univ, Dept Comp Sci, Yiyang 413000, Hunan, Peoples R China.
关键词:
locally linear embedding;face recognition;manifold learning
摘要:
Image data taken with various capturing devices are usually multidimensional and therefore they are not very suitable for accurate classification normally expecting to operate only on a small set of relevant features. Locally Linear Embedding is an effective nonlinear dimensionality reduction method for exploring the intrinsic characteristics of high dimensional data. In this paper, novel Local linear embedding for face classification is proposed. We modify the LIE algorithm by preserving more geometrical knowledge of the high-dimensional data, then combining with simple classifiers such as the nearest mean classifier. Experimental simulations are shown to yield remarkably good classification results in high dimension face image sequence.
摘要:
A multirate nonuniform subband method with general parameter filter banks for wideband beamforming of harmonic nested array is proposed. The harmonic nested array is composed of several uniformly-spaced linear subarrays, each of which processes an octave subband signal. The nonuniform subband signal is generated by general parameter filter banks. Each subarray beamforming is carried out with space-frequency signal processing approach, and four subarrays share the same weights among themselves. Based on this kind of processing architecture, the proposed beamformer splits the wideband signal into several nonuniform narrow subband ones which are processed in parallel, and only one subarray weights are needed. In this way, the proposed beamformer greatly alleviate burden of demanding too many weights for the arrays and hence contributes to significantly decreasing the computational load and improving the speed as well. Simulations show that the proposed beamformer is competent for wideband beamforming with much lower computation complexity.
作者机构:
Department of Computer Science,Hunan City University, Yiyang Hunan 413000, P.R. China;School of Computer Science, China University of Geosciences, Wuhan 430074, P.R. China
会议名称:
The 4th International Symposium on Intelligence Computation and Applications(第四届智能计算及其应用国际会议 ISICA2009)
会议时间:
2009-10-23
会议地点:
湖北黄石
会议论文集名称:
The 4th International Symposium on Intelligence Computation and Applications(第四届智能计算及其应用国际会议 ISICA2009)论文集
摘要:
Differential evolution (DE), a fast and robust evolutionary algorithm for global optimization, has been widely used in many areas. However, the success of DE for solving different problems mainly depends on properly choosing the control parameter values. On the other hand, DE is good at exploring the search space and locating the region of global minimum, but it is slow at exploiting the solution. In order to alleviate these drawbacks of DE, this paper proposes an improved self-adaptive control parameter of DE, referred to as ISADE, for global numerical optimization. The proposed approach employs the individual fitness information to adapt the parameter settings. Hence, it can exploit the information of the individual and generate the promising offspring efficiently. To verify the viability of the proposed ISADE, 10 high-dimensional benchmark problems are chosen from literature. Experiment results indicate that this approach is efficient and effective. It is proved that this approach performs better than the original DE in terms of the convergence rate and the quality of the final solutions.Moreover, ISADE obtains faster convergence than the original self-adaptive control parameter of DE (SADE).
作者机构:
[祝青; 阳王东] Department of Computer Science and Technology, Hunan City University, Yiyang 413000, China;[何焕民] Shan Tou Lin Baixin Science and Techology School, Shantou 515041, China
通讯机构:
Department of Computer Science and Technology, Hunan City University, China
期刊:
Proceedings of the 2008 International Conference on Computer and Electrical Engineering, ICCEE 2008,2008年:296-299
通讯作者:
Jin, Huixia
作者机构:
[Jin, Huixia] Hunan City Univ, Dept Phys & Telecom Engn, Yiyang 413008, Peoples R China.;[Yang, Gelan; Tu, Li] Hunan City Univ, Dept Comp Sci, Yiyang 413008, Peoples R China.;[Yang, Yatao] Beijing Elect Sci & Technol Inst, Beijing 100070, Peoples R China.
通讯机构:
[Jin, Huixia] H;Hunan City Univ, Dept Phys & Telecom Engn, Yiyang 413008, Peoples R China.
摘要:
The mutual authentication mechanism in the IEEE802.16e can avoid the man-in-middle attack, and can protect the multi-hop WiMax security in efficiency. An improved X.509 certificate based on ECC algorithm is designed, then an enhanced mutual authentication flow was proposed in this paper, which enhances the security and working efficiency of the mutual authentication in multi-hop WiMax system. The proposed scheme heightens the security and practicability of WiMax system, which has better referenced value to the improvement of IEEE 802.16e standards.