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.
This paper establishes a risk assessment index system for oil and gas resource countries, with 46 screened indicators across 5 dimensions, namely political risk, economic risk, investment risk, oil and gas resources risk, and the Chinese factor. Furthermore, by using the principal component analysis method, the 46 risk indicators were narrowed down to 16 principal components. Subsequently, a support...
The problem is to obtain the optimal number of base stations (BSs) and their locations on minimized power consumption with requirements of coverage rate and cell load. In this paper, we propose a mathematical model of evaluation index for cell planning and identify the optimization problem. The system model characterizes the total power consumption of planning area, taking into account the radio power,...
Subgraph similarity search is used in graph databases to retrieve graphs whose subgraphs are similar to a given query graph. It has been proven successful in a wide range of applications including bioinformatics and chem-informatics, etc. Due to the cost of providing efficient similarity search services on ever-increasing graph data, database outsourcing is apparently an appealing solution to database...
Taking nine districts and four counties of Xi'an as the research objects, with the empirical study, this paper studies the influences of real estate prices in Xi'an. On the basis of referencing many previous research results, selecting the important indexes influencing the development of real estate market, processing the data with factor analysis, and on the basis of factor scores, analyzing the...
The paper introduces the existing multi-pattern matching algorithms implemented by software, and analyses the Wu-Manber Algorithm in emphases. According to the analysis, the paper points out that we will gain different performance when we adopt different hash function or domain. This conclusion is proved by experiments, which show that we shall adopt appropriate hash functions or domain to improve...
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.