Modern Educational Technology Center

Zhuzhou, China

Modern Educational Technology Center

Zhuzhou, China
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Lu Y.,Zhejiang Shuren College | Xu X.,Zhejiang Shuren College | Li T.,Modern Educational Technology Center | Chen Z.,Zhejiang Shuren College | And 3 more authors.
2010 4th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2010 | Year: 2010

Bioassays are required for the integrated evaluation of water pollution, as physical and chemical tests alone are not sufficient enough for the assessment of potential effects on aquatic organisms. In this study, invertebrate crustacean Artemia salina was applied as a indicator to assess the water quality of Hangzhou Section of Beijing-Hangzhou Grand Canal. According to the result, improvement in water quality was observed between October 2008 and April 2009. It proved A. salina was sensitive in detecting toxicity in water quality. © 2010 IEEE.

Wang B.-X.,Jiangnan University | Wang G.-Z.,Modern Educational Technology Center | Sang T.,Jiangnan University
Journal of Physics D: Applied Physics | Year: 2016

For a general metamaterial absorber, single patterned structure has only one resonance absorption peak. Therefore, a multi-band perfect absorber can be obtained by employing multiple different-sized metallic patterns. However, this kind of design strategy removes the novelty of their resonance mechanism and is also quite troublesome in regard to fabrication. Here, a novel and simple design of a triple-band terahertz absorber formed by only an asymmetric cross is presented. Theoretical results show that the proposed structure has three distinct absorption bands whose peaks are all over 99%. The first two absorption peaks are due to the magnetic resonances of the different sections of the asymmetric cross, and the third peak is based on the surface response of the structure. Moreover, sensing performance of the absorber is investigated in terms of the surrounding index. It is found that the figure of merit and quality factor of the third peak is much larger than those of the first two peaks, which reveals the proposed absorber's, in particular the third resonance mode of the metamaterial, potential applications in sensing and detection. © 2016 IOP Publishing Ltd.

Wang B.-X.,Jiangnan University | Wang G.-Z.,Modern Educational Technology Center | Wang L.-L.,Hunan University
Plasmonics | Year: 2016

We present a novel dual-band terahertz absorber formed by only a patterned U-shaped metallic ring and a metallic ground plane separated by a dielectric layer. Theoretical results show that the proposed absorber has two distinct absorption bands whose peaks are average over 98 %. Different from previous reports by combining the resonances of the complex structure (coplanar super-unit structure or stacked structure) to obtain the dual-band response, the proposed structure utilizes the LC resonance and dipolar response of the single patterned structure and thus making the proposed structure quite easy to be fabricated. The roles of the geometric parameters are investigated to explain the principle of absorption. Furthermore, the proposed concept applies to other types of absorber structure and can be readily extended to other frequency regimes for a host of applications such as detection, imaging, sensing, and selective thermal emitters. © 2015, Springer Science+Business Media New York.

Wang B.-X.,Hunan University | Wang B.-X.,Jiangnan University | Wang G.-Z.,Modern Educational Technology Center | Zhai X.,Hunan University | Wang L.-L.,Hunan University
IEEE Photonics Journal | Year: 2015

Metamaterial-based perfect absorbers have attracted considerable attention due to their potential for practical applications. The existing absorbers, however, are mostly polarization insensitive or only sensitive to one direction, which is inapplicable in some areas. Polarization tunable or high absorption in two orthogonal directions is very useful and necessary. Herein, we present a polarization tunable absorber formed by an asymmetric patch and a dielectric layer on top of a metallic board. With this structure, the frequency of the absorber can be tuned by merely changing the polarization of the incident. The tunable mechanism originates from the different length of the patch along the two orthogonal directions. The concept is rather general and applicable to various absorbers, as long as the asymmetric design is valid. The absorber can find practical applications in manipulation of the polarization of the light and detecting waves with specific polarization. © 2009-2012 IEEE.

Wang G.-Z.,Modern Educational Technology Center | Wang B.-X.,Jiangnan University
Journal of Lightwave Technology | Year: 2015

A novel and simple design of five-band terahertz absorber is investigated. This absorber consists of a four-gap comb resonator and a dielectric slab on top of a metallic board. The simulation results show that the structure has five distinct absorption peaks, each with the absorption of over 98%. Multiband absorption property can be explained by the overlapping of the LC resonances, dipolar response, and high-order resonance of the structure. Moreover, the design gives considerable freedom to shift or change the frequencies of the absorber by varying the arm lengths of the comb. The proposed absorber has potential applications in detection, imaging, and sensing. © 1983-2012 IEEE.

Pengcheng W.,Chongqing Education College | Yang L.,Modern Educational Technology Center
International Journal of Digital Content Technology and its Applications | Year: 2012

The noise content in web pages decreases the accuracies of web applications. Quickly removing the noise content in web pages is one of the key technologies to improve web applications. This paper proposes a novel purification method without site template to purify heterogeneous pages from different web sites. It is a novel approach based on statistics on words account, which does not need any template and has a high accuracy. It is a simple and fast method. The experiment shows that the proposed algorithm is effective. It is stable.

Hu F.,Chongqing University | Li M.,Chongqing Normal University | Zhang Y.N.,Nanjing Gulou Vocational School | Peng T.,Chongqing University | Lei Y.,Modern Educational Technology Center
Lecture Notes in Electrical Engineering | Year: 2013

A news web page has lot of words, most of which exist in topic zones, and the rest in noise zones. According to this feature, we propose a novel approach to purify webpages. Without site template and based on word density, it can purify isomorphic pages, nonisomorphic pages, and pages not meeting XML specification. The test proves it as satisfactory and stable. © 2013 Springer-Verlag.

Hu F.,Chongqing University | Zhong G.,Chongqing University | Bo Q.,Chongqing University | Lei Y.,Modern Educational Technology Center
Research Journal of Applied Sciences, Engineering and Technology | Year: 2013

Computer networks frequently collapse under the destructive intrusions. It is crucial to detection hidden intrusions to protect the computer networks. However, a computer intrusion often distributes high dimensional characteristic signals, which increases the difficulty of intrusion detection. Literature review indicates that limited work has been done to address the nonlinear dimension reduction problem in computer intrusion detection. Hence, this study has proposed a new intrusion detection method based on the Hessian Local Linear Embedding (HLLE) and multi-kernel Support Vector Machine (SVM). The HLLE was firstly used to reduce the dimension of the original intrusion date in a nonlinear manner. Then the SVM with multiply kernels was employed to detect the intrusions.A real computer network experimental system has been established to evaluate the proposed method.Four typical intrusions have been tested. The test results show high effectiveness of the new detection method. In addition, the new method has been compared with the single-kernel SVM with Local Linear Embedding (LLE) or Principal Component Analysis (PCA). The comparison results demonstrate that the proposed HLLE plus multi-kernel SVM can provide the best computer intrusion detection rateof 97.1%. © Maxwell Scientific Organization, 2013.

Xu X.,Modern Educational Technology Center
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2014

There are some deficiencies in the traditional model of describing the collision risk degree even unconformity with the fact is given at present. With the shortcoming of traditional model and need of ARPA, the new vessel safety vector, the vessel safety coefficient and the vessel collision risk degree are given in this paper. After the analysis of vessel collision, intersection, vessel collision zone, the vessel safety coefficient and vessel collision risk degree are obtained and arranged easily, based on the new model of vessel collision risk degree. The diagram of multi vessel collision avoidance is also accounted with the new model of vessel collision risk degree. Providing reference of multi vessel collision avoidance are used by navigator. Achievement through computer programming is finished.

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