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.
How does a search engine company decide which advertisements to display for each query to maximize its revenue? This turns out to be a generalization of the online bipartite matching problem. In this paper, search engines decide the strategy to allocate resources with an advertiser credibility factor under budget constraints. Based on the optimal algorithm, which is the notion of a trade-off revealing...
The hardness of fitness functions is an important research topic in the field of evolutionary computation. In theory, this paper can help with understanding the ability of evolutionary algorithms (EAs). In practice, this paper may provide a guideline to the design of benchmarks. The aim of this paper is to answer the following research questions. Given a fitness function class, which functions are...
As cultural industry, with the further development of economy and society, is becoming the pillar industry, a more rational urban cultural industry competitiveness evaluation index system is proposed on the existing theories in this paper to evaluate Tianjin's cultural industry competitiveness from the longitudinal to the horizontal aspect by grey fuzzy comprehensive evaluation method. After the quantitative...
Based on wind speed sequences, three-layer neural network model of wind speed prediction is analyzed to obtain the selecting method of neural network input, output and hidden layers' node parameters, and to predict wind speed through rolling wind speed data. In accord with the nonlinear of wind speed sequences, a BP neural network model is established to forecast wind speed. The feasibility and validity...
In this paper, a stream color image cryptography has been proposed based on spatiotemporal chaos system. One-way coupled map lattices (OCML) are used to generate pseudorandom sequences and then encrypt image pixels one by one. By iterating randomly chosen chaotic maps from a set of chaotic maps for certain times, the generated pseudorandom sequences obtain high initial-value sensitivity and good randomness...
In this paper, an improved colour image encryption is proposed, which is based on a chaotic logistic map and the one-way coupled-map lattices (OCML) model. The results of several experimental, statistical analyses and key sensitivity tests prove the security robustness of the proposed cryptosystem.
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.