In this paper, a novel band-pass miniaturized FSS is proposed, in which a unit cell consists of four spiral etched slot lines arranged central-symmetrically on a dielectric substrate, and the spiral elements are place...
详细信息
In modern wireless communication systems, one of the most promising techniques to improve the communication reliability and rate relies on the use of Multiple Input Multiple Output (MIMO) systems in association with S...
详细信息
In this paper, one-element and six-element antenna arrays, conformal to electrically large cylinders of finite length, are simulated. When the length of conducting cylinder changes, the proposed antenna maintains stab...
详细信息
In this paper, one-element and six-element antenna arrays, conformal to electrically large cylinders of finite length, are simulated. When the length of conducting cylinder changes, the proposed antenna maintains stable radiation patterns. Moreover, the proposed antenna array provides end-fire radiation patterns with a high gain and high front-to-back ratio.
Filter circuits are mainly used to constraint the signal frequency bandwidth, separate signals from disturbance frequencies, and fast sharp pulse. However, in previous studies, the problems are analyzed mostly from th...
详细信息
This paper adopts the internationally acknowledged evaluation principles and profoundly builds up the comprehensive evaluation index system and objective function as for the problems of one-sidedness and subjectivity ...
详细信息
Information entropy based criteria are analyzed and the Normalized Mutual Information(NMI) that is presented in the field of image registration is revised to Normalized Mutual Information Entropy (NMIE) to meet the ne...
详细信息
ISBN:
(纸本)9781467325813
Information entropy based criteria are analyzed and the Normalized Mutual Information(NMI) that is presented in the field of image registration is revised to Normalized Mutual Information Entropy (NMIE) to meet the need of the evaluation of image fusion algorithms, Then, through analysis to NMIE and some human perception based criteria, and by analyzing the essence of image fusion techniques systematically, a new index, Normalized Perception Mutual Information (NPMI), is defined in view of information transmission as well as edge preservation, and is used to evaluate the performance of image fusion algorithms, The experiments are done to three groups of images, namely, the remote sensing images corrupted by noises, the multifocus images and the medical images obtained by CT and MRI, respectively. Compared with other indices including the root mean square error (RMSE), space frequncy (SF), space visibility (SV), entropy, the collective cross entropy (CCE), information deviation (ID), and the edge information preservation value (EIPV), etc., NPMI is shown to be the only one that is effective in all the eases in the evaluation of the performances of the fused images or the image fusion algorithms, which illustrates the feasibility and effectiveness of the presented algorithm.
This paper presents a novel stacked patch antenna design with stable radiation and high gain characteristics. The presented antenna provides the bandwidth from 2.4 GHz to 2.483GHz. This bandwidth is realized by stacki...
详细信息
This paper presents a novel stacked patch antenna design with stable radiation and high gain characteristics. The presented antenna provides the bandwidth from 2.4 GHz to 2.483GHz. This bandwidth is realized by stacking the copper sheet. The bandwidth of the stacked antenna is narrow, but results in stable radiation patterns and high gain in the operating band, and the main gain can achieve 8.9dBi.
A new form of optical wireless communication is presented in this paper. The proposed method is developed from a cheap and simple technology of two dimensional barcode where the data is easily obtained just by using a...
详细信息
A new form of optical wireless communication is presented in this paper. The proposed method is developed from a cheap and simple technology of two dimensional barcode where the data is easily obtained just by using a camera equipped smart phone. In this paper, a computer monitor is used for displaying spatial modulation images and a webcamera is used as a receiver. Consequently, the acquired images are decoded by an in-house software. The encoding process is done by applying the 2D barcode scheme. Initial experimentations are preformed to prove the concept of the method.
We review the research progress on Yagi-Uda antennas starting from the very first paper published in an English journal in 1926, including theories, numerical simulations, and experiments. In this article, the typical...
详细信息
We review the research progress on Yagi-Uda antennas starting from the very first paper published in an English journal in 1926, including theories, numerical simulations, and experiments. In this article, the typical endfire antennas, Yagi-Uda and quasi-Yagi antenna, are reviewed. Many variant structures of the endfire antenna and how to improve bandwidth are also discussed. Finally, we presnet the further work about planar endfire antennas, Yagi-Uda and quasi-Yagi antenna.
After a general introduction of the VIKING EU FP7 project two specific cyber-attack mechanisms, which have been analyzed in the VIKING project, will be discussed in more detail. Firstly an attack and its consequences ...
详细信息
After a general introduction of the VIKING EU FP7 project two specific cyber-attack mechanisms, which have been analyzed in the VIKING project, will be discussed in more detail. Firstly an attack and its consequences on the Automatic Generation control (AGC) in a power system are investigated, and secondly the cyber security of State Estimators in SCADA systems is scrutinized.
暂无评论