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 this paper, the Hang Seng Index data for the 22-year period, from December 31, 1986, to June 6, 2008 in the Hongkong stock market, are analyzed. Using rescaled range method, the Hurst exponent is estimated for financial time series and empirical evidence suggests that such market possess strong long-range dependence for both conditional time series and volatility. In order to get more information...
A new method of optimized path planning about smart card based on Dijkstra algorithm is proposed in this paper, for the path planning problem of China road charges. The IC Card Key Infrastructure and CRC check code technology of city uni-card system are combined in the algorithm, and the division with the shortest path using the minimum rate of fees is formed based on the recursive optimized and improved...
In this paper, we design a mobile-based patent search service system, described the architecture of module in details. During the process of module design, we propose many innovation views such as a user interface adapt to the mobile patent search environment, combining the user preferences of a patent with patent search information, turning of patent information pages and so on. And we expand on...
The financial crisis is an ongoing crisis triggered by a dramatic rise in mortgage delinquencies and foreclosures in the world now, with major adverse consequences for listed companies around the globe. And computer industry enterprise in China must enhance their competitiveness force to increase market share. This paper constructs competitiveness evaluation index system of the listed companies in...
The evaluation for current situation of ecological compensation is significant to strengthen the system of ecological compensation. In the study, the method based on the combination of analytic hierarchy process (AHP) and fuzzy theory is proposed to evaluate ecological compensation. Firstly, evaluation indexes for ecological compensation are described, and the evaluation model of ecological compensation...
To the problem of the financial risk management, the paper brings forward a new model based on main component analysis method and multi-classes support vector machines. In one hand, the main component analysis method was used to reduce the number of indexes and to improve the efficiency. In the other hand, the multi-classes support vector machines was used to classify the warning accurately. Because...
Informationization must enhance risk awareness, and decision of modern management need the data that is the reference and support. A lot of factors which influence the informationization risk are fuzzy and variable, therefore, it is difficult to make the quantitative analysis. So, it has a certain research value and Practical significance that study and applcate the way to evaluation risk of informationization...
The paper focuses on a spatial rotation three Degree of Freedom (DOF) 4-SPS-S parallel robot mechanism, which has four SPS Active Legs and one passive constraining leg. The geometric model of the parallel robot mechanism is introduced, and then velocity mapping equation and Jacobian matrix for the robot mechanism are developed. Based on principle of virtual work and sub-structure synthesis method,...
The evaluation and estimate of the loss and damage in earthquake disaster is an important factor for earthquake emergence and post-earthquake reconstruction decision-making. The article firstly selected the evaluation index for the economic loss of earthquake disaster by the method of factor analysis; then established the evaluation model of economic loss in earthquake disaster based on neural network,...
Peer-to-Peer (P2P) has attracted a great deal of interest in industry and research literature. Peer-to-peer information systems (P2PIS) are Internet-based systems for distributed data management that operate in a completely decentralized manner, aiming at unlimited scalability with millions of nodes, continuous availability regardless of node and network failures, self-stabilization in the presence...
It is of great significance to study the index weight that plays an important role in the system of comprehensive evaluation-signs of multimedia courseware. To eliminate the randomicity in the process of overall evaluation, this paper analyses and constructs the evaluation model of index weight based on artificial neural network back propagation (BP) algorithm as well as the method of designing and...
By way of analyzing uncertainty on the classification of state parameters of Diesel Engine turbocharging system, this paper defines index distinguishable weight on basis of classification and builds the unascertained measure model of the comprehensive evaluation on fault diagnosis of Diesel Engine turbocharging system. Then it explains diagnostic procedure and usage on index distinguished weight by...
Shock isolator with minimum settling time (SIMST) is a vital device in military and civil use. At present, the design of SIMST draws a lot of attention. Because one of the indexes of SIMST is time variable other than state variable, there is no computation method given so far, and the design of SIMST mainly depends on experiments. In this paper, genetic algorithm is applied to the design. The genetic...
Based on three phases TM image acquired in 1992, 2000 and 2006, this paper took Kunming in China as a case study to evaluate the urban environment quantitatively by using NDVI and green index. Due to different atmospheric conditions, seasonal changes in vegetation characteristics and other reasons, the remote sensing images captured at different time may be quite different in color and brightness...
Oracle is the most widely used large-scale database in business society at present, and its performance influences the efficiency of application directly. This paper starts with basic principles of performance optimization of database, then presents some optimize technologies in two phases of database running. Experimental results show that: the database optimization can improve the disposing performance...
Construction is one of the most dangerous and risky businesses and building construction projects appear to have higher accident rates. In this paper, a new construction projects accident risk model was developed based on the unascertained number algorithm and the synthesis weights. According to human-machine engineering, the multi-index and hierarchical system of accident risk in construction projects...
With the new issues put forward by the Green Building system, a highly complicated systematic project, it is imperative to establish an evaluation tool as the technical support of practical operation. So that it can help to bring consensus for co-operators involved in the whole construction process and at multi-level. Multilevel fuzzy comprehensive evaluation is a relatively valid method. In this...
Combining the rough set theory with hierarchic analysis model in view of their characteristics and introducing the definition of importance into non-core attributes, a new data reduction algorithm is proposed using a simple discriminative matrix. The validity and completeness of the algorithm is proved, by which the problem of index reduction for information systems security risk assessment is successfully...
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,...
Extenics is a theory to solve the contradiction problem, it will be a new way to look for and find knowledge through analysis the contradiction and transformation the result of the data mining using the extension methods. In this paper, introduced the matter-element and extension set that is the base of the extenics, researched the way to find out and generate the new knowledge that help by the divergence,...
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.