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Generally, the local structures are studied from second vertical derivative gravity anomaly in reconnaissance survey because of shortage of seismic data and other information. But if igneous rocks are pervasive, thick and large enough, it causes gravity anomalies with a certain extent sizes and amplitudes. So when we start the research of the local structures in this stage, we need to synthetically...
This paper proposes an effective reconfiguration algorithm to increase the network lifetime by fairly distributing clusterheads (CHs) in wireless sensor networks. For a fair distribution of the CHs, the current CH chooses the next CH according to the two metrics - the number of general nodes (GNs) in a cluster and the number of CHs within the GN's transmission range. By fairly distributing the CHs,...
Optical fiber communication signal classification is to identify modulation style of signal with much noise. wavelet transformation has a good localization characteristic in time-frequency domain, and the neural network has characteristics of self-study, self-adaptation, and high stabilization, which can improve the automatization and intelligence of recognition, so we combined the advantages of wavelet...
In life detection radar echo signal is very weak and hard to extract. For solve this problem, weak life signal de-noising based on wavelet transform is studied. Through the studies of wavelet threshold de-noising method, the use of it in weak life signal de-noising in strong noise background, and the verification of simulation by Matlab, the results shows that wavelet threshold de-noising method can...
Based on the principle and method of grey absolute degree of incidence, the relationships between citation indicators of management academic journals are analyzed. The results show that The average number of authors per paper and The ratio of financial assistance papers are the most important two factors which can effect the Impact factor and the Immediacy index of the management science journal,...
We propose a new skew detection algorithm, which is based on the lowest pixels of a set of characters. The skew angle is evaluated by applying moment calculation, and the method to get characters in one text-line is described in detail. Document images of various languages, including English and Chinese, can be validly treated by this algorithm. Both the document images with large skew angle and the...
Auto-focusing is an important problem for various imaging systems. A good focus measure, or evaluation function, is critical for the accomplishment of this task. Some evaluation functions are introduced. Analysis is done on evaluation functions using global data such as the squared image gradient magnitude of the whole image, asserting that these approaches may suffer from the indiscriminate use of...
The present study investigated time-varying coherence to analyze the spectrum synchronization pattern among multi-channel local field potentials (LFPs). Spectrogram analysis, fast Fourier transform (FFT) and power density estimate on LFPs were performed for characteristic bandwidth as theta-band power. 16-channel's time-varying spectrum coherence was calculated between each channel and reference channel...
In order to compensate for functional defects or add new features of an embedded product, the designer need to continuously update the system program. With the development of network technology, the end-user can download the update program through the network and complete the update process. But for the unattended equipments, they are often used of automatic remote update. On-line programming function...
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