期刊：
Recent Advances in Electrical & Electronic Engineering,2016年9(1):6-10 ISSN：2352-0965
通讯作者：
Huixia, Jin(jinhuixia2002@163.com)
作者机构：
[Chi, Zhang] Department of Information Science and Engineering, Hunan City University, Yiyang, 413000, China;[Huixia, Jin] Department of Communication and Electronic Engineering, Hunan City University, Yiyang, 413000, China
通讯机构：
Department of Communication and Electronic Engineering, Hunan City University, Yiyang, China
摘要：
Conventional thresholding shrinkage for denoising is designed with assumption that the coefficients in transformation domain are independent. However, in practice, natural images’ coefficients in transformation domain have significant dependencies. In this paper, we proposed a novel method for image denoising by exploring the dependencies among the coefficients. The method considered three corresponding coefficients, including the noisy coefficient, its parent coefficient and its neighbor coefficient based on the Sharp Frequency Localization Contourlet, and established a trivariate distribution model to estimate the latent coefficient. Furthermore, the shrinkage function in model is derived under the Bayesian framework. The experiment results showed that the performance of proposed method outperformed the current denoising method.
作者机构：
[阳同光] College of Information Science and Engineering, Hunan City University, Yiyang, Hunan Province, 413000, China;[桂卫华] College of Information Science and Engineering, Central South University, Changsha, Hunan Province, 410083, China
摘要：
A variety of recognizing architectures based on deep convolutional neural networks have been devised for labeling videos containing human motion with action labels. However, so far, most works cannot properly deal with the temporal dynamics encoded in multiple contiguous frames, which distinguishes action recognition from other recognition tasks. This paper develops a temporal extension of convolutional neural networks to exploit motion-dependent features for recognizing human action in video. Our approach differs from other recent attempts in that it uses multiplicative interactions between convolutional outputs to describe motion information across contiguous frames. Interestingly, the representation of image content arises when we are at work on extracting motion pattern, which makes our model effectively incorporate both of them to analysis video. Additional theoretical analysis proves that motion and content-dependent features arise simultaneously from the developed architecture, whereas previous works mostly deal with the two separately. Our architecture is trained and evaluated on the standard video actions benchmarks of KTH and UCF101, where it matches the state of the art and has distinct advantages over previous attempts to use deep convolutional architectures for action recognition.
摘要：
Interfacial resistive switching features are highly dependent on the distribution of the carrier traps in the interface. However, the lack of probing seriously restricts ways of offering physical insights into its mechanism and improving interfacial resistors. In this work, we investigated a resistive switching interface that consists of Bi2S3 nano networks (BSNN) and F-doped SnO2 (FTO), uncovering the relationship between the decay of the photoconductance in BSNN and interfacial trap distribution. Based on this, we suggest a general method to probe the distribution of various interface traps. This method provides us with a new tool to study the interfacial trap distribution in an interfacial resistor, and it might also be used to understand other interface problems.
作者机构：
[张弛; 王加阳] School of Information Science and Engineering, Central South University, Changsha, China;[涂立; 张弛] School of Information Science and Engineering, Hunan City University, Yiyang, China
通讯机构：
School of Information Science and Engineering, Central South University, Changsha, China
关键词：
蚁群算法(ACA);轮盘赌;信息素;差分演化;灾变
摘要：
针对传统的蚂蚁算法容易出现早熟和停滞现象,提出一种新型蚂蚁算法(new ant colony algorithm,NACA),即将转移规则、全局信息素灾变规则和局部混合调整信息素规则。选择几个典型TSP问题进行实验。研究结果表明:新型蚂蚁算法一方面提高了算法种群的多样性,同时将轮盘赌算子利用到城市转移规则中,有利于提高算法的收敛速度;另一方面,将种群个体的差分信息应用于局部信息素更新规则中,有利于搜索全局解;最后灾变算子避免算法陷入局部最优,而达到全局最优。新型的蚁群算法具有更强的搜索全局最优解的能力以及更好的稳定性和收敛性,同时为解决其他优化问题提供新的思路。
摘要：
An all-fiber temperature sensor based on a Sagnac loop is demonstrated experimentally. The sensor head comprises single-mode-multimode-polarization-maintaining (SMP) fiber structure and a tilted long period fiber grating. By measuring the peak wavelength shift, the temperature can be determined. Experimentally we have achieved a sensitivity of 1.5 nm/degrees C when the sensor head is reeled into a round with the radius of 10cm. (C) 2015 Elsevier GmbH. All rights reserved.
通讯机构：
[Tian, Ye] H;Hunan City Univ, Sch Commun & Elect Engn, Yiyang 413000, Hunan, Peoples R China.
关键词：
Effective refractive index;Near ultraviolet;Numerical simulation;Physical vapor deposition;Raman scattering;Thin films
摘要：
Hybrid nanostructures composed of plasmonic metal and semiconductor are receiving increasing attentions, owing to their unique optical features that are induced by the co-existence of localized surface plasmon resonance (SPR) and semiconduction as well as the synergistic interactions between these two components. Other than the structures based on conventional noble metals, a cost-effective structure based on non-noble metal is studied in this work. Utilizing the surface dewetting in Bi-Si system, the Bi-nanorod/Si-nanodots hybrid structure (BSHS) is prepared by alternated sputtering of Bi and Si at low rate. The shift, split, and high order excitation of SPRs in BSHS are studied combining numerical and theoretical simulation. Calculations of the optical extinction performed as a function of the size of BSHS show a guideline to tune its spectra.
摘要：
In this paper, we propose a Detail-Preserving Sparse Model (DPSM) for de-noising of images that are usually interfered by noise on the Wireless Multimedia Sensor Network (WMSN). Specifically, based on the Structural SIMilarity (SSIM), the DPSM first incorporates a structural-preserving constraint, which enables the structure in the reconstructed image to be close to the ideal nonoise image. In addition, the DPSM adopts a residual ratio as the stopping condition of the sparse solution algorithm (e.g., Orthogonal Matching Pursuit), which enables the structures to be reconstructed under high noise conditions. The experimental results on several WMSN images have demonstrated the superiority of the proposed DPSM method over several well-known de-noising approaches in terms of PSNR and SSIM.
作者机构：
[He, Zhihui; Zhan, Shiping; Chen, Zhiquan; Li, Boxun; Xu, Hui; Li, Hongjian] Cent S Univ, Coll Phys & Elect, Changsha 410083, Hunan, Peoples R China.;[Chen, Zhiquan] Hunan City Univ, Coll Commun & Elect Engn, Yiyang 413000, Peoples R China.
通讯机构：
[Li, Hongjian] C;Cent S Univ, Coll Phys & Elect, Changsha 410083, Hunan, Peoples R China.
关键词：
Surface Plasmon Polaritons;Fano resonance;Sensor;Sensitivity;Figure of merit
摘要：
Sensing characteristics based on Fano resonance in a rectangular ring resonator with a stub are investigated numerically. Simulation results show that a sharp and asymmetric Fano-line shape emerges in the proposed structure. Through tuning the width and length of the stub, it is found that the width and length play an important role in optimizing the sensing characteristic. Using the sharp and asymmetric Fano-line shape a highly sensitive plasmonic nanosensor with the sensitivity of 1000 nm/RIU and a tunable figure of merit (FOM) can be attained. The maximum FOM can reach up to 992,800 when the stub length d=120 nm, width l=130 nm and the refractive index difference Delta n=0.05, which is larger than that in previous reports. In addition, the results show that a larger FOM can be obtained by tuning the stub width than tuning its length. The proposed model and results provide guidance for fundamental research of the plasmonic nanosensor applications and designs. (C) 2015 Elsevier B.V. All rights reserved.
通讯机构：
[Xu, Yuming] H;Hengyang Normal Univ, Dept Comp Sci, Hengyang 421008, Hunan, Peoples R China.
关键词：
Artificial Chemical Reaction Optimization;Job Scheduling;Makespan;NP-Hard Problem
摘要：
The non-deterministic polynomial-time-hard job scheduling problem can be regarded as the optimal assignment of a set of jobs to a set of computing nodes to minimize the completion time. Such problems can be efficiently addressed through a meta-heuristic optimization approach, such as the new artificial chemical reaction optimization method. This approach mimics a chemical reaction process in which reactants interact with one another to reach the minimum enthalpy (potential energy) state. Therefore, this study proposes a novel approach of artificial chemical reaction optimization for job scheduling (ACROAJS) in grid computing environments based on the recently proposed chemical reaction-inspired meta-heuristic. Software simulation results show that the proposed ACROAJS algorithm significantly improves job schedule quality (makespan) in grid computing environments compared with two existing solutions [genetic algorithm and heterogeneous earliest finish time algorithm] over a set of randomly generated graphs and over graphs for real-world problems with various characteristics. With this algorithm, makespan was reduced by approximately 5.06% on average.
作者机构：
[阳同光] College of Information Science and Engineering, Hunan City University, Yiyang, China;[阳同光; 桂卫华] College of Information Science and Engineering, Central South University, Changsha, China
通讯机构：
[Yang, T.-G.] C;College of Information Science and Engineering, Hunan City University, Yiyang, China
期刊：
JOURNAL OF MECHANICS,2015年31(5):515-523 ISSN：1727-7191
通讯作者：
Cai, J. -L.
作者机构：
[Huang, W. -L.] Hunan City Univ, Dept Phys & Telecom Engn, Yiyang, Peoples R China.;[Cai, J. -L.] Hangzhou Normal Univ, Coll Sci, Hangzhou, Zhejiang, Peoples R China.
通讯机构：
[Cai, J. -L.] H;Hangzhou Normal Univ, Coll Sci, Hangzhou, Zhejiang, Peoples R China.
关键词：
Non-holonomic system;Variable mass;Mei symmetry;Inverse problem
摘要：
The inverse problem of the Mei symmetry for nonholonomic systems with variable mass is studied. Firstly, the authors discuss the Mei symmetry of the holonomic system opposite to a nonholonomic system. Secondly, weak and strong Mei symmetries of a nonholonomic system are concluded through restriction equations and additional restriction equations. Thirdly, the relevant conserved quantity is deduced by means of the structure equation for the gauge function. Fourthly, the inverse problem of the Mei symmetry is obtained by the Noether symmetry. Finally, the paper offers an example to illustrate the application of the research result.
作者机构：
[阳同光] College of Information Science and Engineering, Hunan City University, Yiyang, China;[阳同光; 桂卫华] College of Information Science and Engineering, Central South University, Changsha, China
通讯机构：
[Yang, T.] C;College of Information Science and Engineering, Hunan City University, Yiyang, China
