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The communication power supply need to meet the requirements of high dynamic and steady state, so as to ensure the stability when disturbed. V2C control method is studied by analyzing the effect of the parameters on the output with the help of small signal model. Then the V2C adaptive control method based on fuzzy rules is put forward to improve dynamic response and stability of system when disturbed,...
The Transfer Equipment Cask (TECA) is a key solution for Remote Handling (RH), and the bidirectional sealing door system (BSD) is the key component of the TECA. The control system of BSD is introduced in this paper. Moreover, the experiment on TECA indicates that the design of control system is feasible and the effect is satisfactory.
The physically-based vegetation canopy reflectance model is the basis for accurate inversion of important vegetation parameters. According the interactive process between photons and canopy, canopy reflectance could be divided into two parts: single scattering and multiple scattering reflectance. Recollision probability is a useful tool linking leaf optical properties to canopy reflectance or absorption...
Localization and tracking of underwater moving objects are of great interest in many applications. This paper presents a recent sea test on underwater localization carried out in the Sizihwan coastal area near Kaohsiung, Taiwan, May 2013, where three stationary nodes are used to localize one mobile node via acoustic communications based on orthogonal frequency-division multiplexing (OFDM) modems....
SIFT is one of the most robust and widely used image matching algorithms based on local features. But the key-points descriptor of SIFT algorithm have 128 dimensions. Aiming to the problem of its high dimension and complexity, a novel image matching algorithm is proposed. The descriptors of SIFT key-points are constructed by the rotation invariant LTP, city-block distance is also employed to reduce...
This paper introduces the principle of frequency divider and circuit design based on VHDL??Cwhich describes integer and half-integer frequency division and the decimal frequency division algorithms. It can achieve any number divider for base frequency. The generality of this design is good. It can be used into the design of diverse digital circuit systems.
Carrier frequency synchronization is the critical technique in orthogonal frequency division multiplexing (OFDM) systems. In this paper, an improved carrier frequency offset (CFO) estimation method is proposed, which divides the Schmidl's CFO estimation into coarse and fine estimation by using PN sequence iteration, the new method has higher estimation accuracy and larger estimation range than that...
Jsteg and F5 are two typical steganography methods of JPEG images and have been used widely. To distinguish F5 stego images and Jsteg stego images, a classification algorithm based on sensitive features and SVM classifier is presented, where the sensitive features are extracted from the subband coefficients of those stego-images and the subband coefficients are obtained by wavelet packet decomposition...
In this communication, we present a high resolution tactile plate that can localize one or two contact fingers. The localization principle is based on Lamb wave absorption. Fingers' contact will generate absorption signals while Lamb waves are propagating in a thin finite copper plate. These signals can be related to the contact positions and can be calibrated before the use of tactile plate. Fingers'...
A new blind steganalyzer is constructed to markedly improve performance with higher universalness and detection accuracy. It merges Robert gradient energy in pixel domain, variance of Laplacian parameter in DCT(discrete cosine transform) domain and higher-order statistics extracted from wavelet coefficients as the feature vector of the proposed steganalysis algorithm, and BP(back propagation) neural...
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