The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In the practical work, uncertain data are very important data type in a lot of applications. The ability to deal with uncertain data is becoming increasingly important for modern database applications. Meanwhile, there is an important analysis technique for certain data named skyline operator which finds the good solution in multidimensional environment. In this paper, the skyline query was introduced...
Split-share structure reform has been a focus since its implementation. It is of great significance in theory and practice to solve whether the circulation initiatives of 2/3 of the non-outstanding shares for listing companies are promoting the development of capital markets validity. By sampling A-share listed before December 31, 1996 in Shanghai stock market, this paper analyzes the simulation of...
Image hatching (or non-photorealistic line-art) is a technique widely applied in the printing or engraving of currency. Diverse styles of brush strokes have previously been adopted for different areas of an image to create textures and shading. Because there is no continuous tone within these types of images, we propose a multi-level scheme, which uses different textures based on a threshold level...
Visual cryptography provides a very powerful technique by which one secret can be distributed into two or more pieces known as shares. When the shares on transparencies are superimposed exactly together the original secret can be discovered without computer participation. In this paper, we take multiple secrets into consideration, and generate a master key for all the secrets; correspondingly, we...
Ultrasonic nondestructive testing for wood defects is studied based on the energy spectrum variety of the ultrasonic signals by means of wavelet transform, coefficient of wavelet node and the artificial neural networks (ANN). The energy change of defect wood specimen mostly depends on the degree of defects. And the defect degree is proportional to the energy change. By comparing the energy variety...
The chief aim of the present work is to investigate the features of multifractal structure of stock price index. It applies the multifractal detrended fluctuation analysis (MF-DFA) model to analyze the returns of both ShangHai synthesis stock price index (SHSSPI) and ShengZhen composite stock price index (SZCSPI). By calculating the generalized Hurst exponent h(q) and its function /spl tau/(q), the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.