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.
Based on the financial security index calculated in the method of principal component analysis, this paper applies the model of BP neural network to test the result and then puts forward the early warning of Chinese financial security position in the future. In addition, the article gives some following suggestions for the early warning of financial risks: we shall reform the current financial regulation...
A method is proposed for online power system voltage security assessment (VSA) using decision trees (DTs). The DT inputs are the data gathered from phasor measurement units (PMUs). The dimensions of the training data are reduced in two ways. First, the number of features is decreased by principal component analysis (PCA). Second, the number of training cases is decreased by correlation analysis. Biogeography-based...
Network marketing in e-commerce is different from traditional marketing in several new features. This paper uses SPSS for the reliability and validity of principal component analysis on indicators, and suggests network marketing models under the framework of performance evaluation index system. Combined with FAHP, we designed two main network marketing business models and conducted related empirical...
In order to more effectively assess the safety risk of a wind farm project, the evaluation indicators in the life cycle of a project can be divided into quality index, cost index, time index, security index, and sustainable development index. By combining the qualitative with quantitative, the model of principal component analysis (PCA) of the life cycle indicators was established, which can reflect...
Food security is a major worldwide issue nowadays. One of the supporting indicators of the food security level is the trend of the global agriculture output per capita. In this study, grain data from China between 1997 and 2007 is used as a means to indicate the level of grain security. The inputs for this study are based on 3 categories, productive indexes, consumptive indexes, disaster indexes,...
The Shanghai Stock Exchange restarts the warrants trading in 2005. And then warrants become the most dynamic financial derivatives of the securities market. This paper structures a metric of the effectiveness of the Warrant Creation Mechanism by principal component analysis and then tests it. The results demonstrate that the Warrant Creation Mechanism significantly affect the pricing efficiency of...
According to the application practice of production and management in coal enterprises and the basic principles of establishing the evaluation index system of informationization, we designed the tentative evaluation index system of coal enterprise informationization first; and then we selected the indices and optimized the index system by using the principal component analysis method, establishing...
Mobile ad-hoc networks (MANET) has highly dynamic topology, open access of wireless channel and unpredictable behaviors, however, absence of effective security mechanism render MANET more vulnerable to positive attacks. Conventional assessments always require large sample data satisfy specific distribution and establish models through subjective recognition, thus lack common applicability, objectivity...
The qualities of reclaimed water influence the security and suitability of agricultural irrigation largely, which could be represented by indices total salt content, ALK, LAS, coliform groups and TN. What is the rule of variation of water qualities? The method of principle component analysis (PCA) and analysis of variance (ANOVA) could give the best answer. The result showed not only total salt content,...
10 risk factors are obtained from the view of energy risk management. The weight of each risk factor is decided by the sequence of PCA-LZNMAP model. Risk coordinate diagram, which intuitively reflects the attention degree of the energy risk factors and the measures which should be taken, was drawn based on these weights. At the same time, it is concluded that the evaluation value of energy risk is...
Wireless networks and mobile devices, which had brought lots of convenience to our daily life and made us much easier to get information any time and any where, now had motivates the needs for efficient tools analyzing data streams. Data mining technology turned into a valid tool for us to make scientific decision. Data mining can transform vast data resource into available knowledge and information...
Mobile ad-hoc networks (MANET) has highly dynamic topology, open access of wireless channel and unpredictable behaviors; however, absence of effective security mechanism render MANET more vulnerable to positive attacks. Conventional assessments always require large sample data satisfy specific distribution and establish models through subjective recognition, thus lack common applicability, objectivity...
Grain security is the premises of continuous development for a country, and it has been a global problem. There is a very important meaning to study and formulate new grain security evaluation indexes system and evaluation methods. Principal components analysis (PCA) is a multivariate statistical technique that can be used as a data exploration tool, both by classifying participants and simplifying...
This paper presents an advance stratagem to prevent contingencies and solve the optimal problem of economic and security dispatch. The dispatch takes outage and limitation of technical constraints into account. In order to ensure state steady stability for accidents, preventive control algorithm (PCA) based on the generalized reduced gradient method processing a preventive contingency set jointly...
In IPO market, underwriters play an important role as information producer and intermediaries of quality authentication, but underwriters also face creditability problem. Underwriters' reputation is the very index for evaluating the degree of underwriters' creditability, and the measurement on underwriters' reputation is a very important and complex problem, however, mostly in the previous researches...
According to mathematical analysis, the primary components analysis (PCA) is used to analyze the effect of influential factors and characteristics on e-commerce development. On the basis of PCA model and the scores by the experts, some results are computed. From case study, it can be seen that some factors and characteristics play very important role in influencing e-commerce development and all the...
Internet Security mechanism of itself is more vulnerable. While coupled with the inherent openness of wireless network media and the limitations of mobile storage and computing resources in the wireless network environment, it does not only have to be encountered with the security threats in the cable network environment but also the emerging wireless-specific threats to the wireless environment....
Through mathematical analysis, the primary components analysis (PCA) is used to analyze the effect of influential factors on campus network security (CNS). Based on PCA model and, the results are computed. Through case study, it can be seen that some factors and characteristics play very important role in influencing CNS and all factors should be considered because the effect depends on the factors...
Matter-element evaluation model for the ten cities eco-security in China was constructed by using of extension engineering method. Using this model, we can overcome the subjective one-sidedness in the multi-angle and multi-factor identification evaluation. PCA was applied in the multi-index comprehensive identification. The following results were got in this article. Evaluation result of Nanjing city,...
With the development of IT, kinds of information systems and software have been applied in the audited enterprises. That means the audited enterprises have set up their computer-based information-processing environment. In such environment, the uncertainty factors of the certified public accountants (CPA) audit are increasing and the audit risk is enhanced. It is more suitable for the audit risk factors...
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.