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 recent years, water pollution incidents happen frequently, causing serious disasters and society impact. It is advocated that water quality monitoring sensors shall be deployed in water distribution systems to realize the real-time pollution detection such that we can effectively detect the water pollution event to reduce the risk. However, how to deploy water quality sensors in water distribution...
This paper proposed an improved thermal-circuit model for power transformer hot-spot temperature prediction with dynamic loading. The influences of solar radiation and the environmental temperature on the heat dissipation were also considered. When calculating the heat dissipation from the transformer tank to surroundings, the average oil temperature was selected as the node value in the thermal circuit...
The growth curve analysis is a hotspot in the analysis to understand the characteristics of things change over time. However, the conventional curve fitting method does not apply to the structure data obtained by repeated measurement. Although the outline design matrix computation can be used to treat the structure data in the growth curve analysis, the corresponding SAS programs are very long and...
We consider a supply chain that consists of one (upstream) supplier and two (downstream) heterogeneous retailers. One is the retailer direct buying and selling product enter an online, the other is the retailer buying and selling product through traditional channel. From some assumptions, we establish the optimal profit model under the manufacturer control the traditional channel and network channel,...
With the rapid increase of the capacity in photovoltaic (PV) generated systems, how to deal with the problem caused by the random output in the system becomes more significant. One possible solution could be the use of energy storage. The forecasting output can be obtained by the support vector regression model (SVR) introduced in this article, then the capacity of energy storage can be optimized...
Hybrid production lines with unreliable machines and buffers are examined. Different from traditional aggregation method, the unreliable buffers are originally considered and a more general aggregation method is offered, in which not only the unreliable buffers are considered, but also the probabilities of system states are obtained by a discrete model rather than the continuous flow model of unreliable...
In the paper, a novel principle of variable reactor with a transformer and inverter control is proposed. A transformer with air gap is chosen and its primary winding is connected in series or parallel in power utility, the primary winding current of the transformer is detected and functioned as the reference signal. A voltage source PWM inverter is applied to produce a voltage, which is a controlled...
In the series hybrid active power filter (SHAPF) based on fundamental magnetic flux compensation (FMFC), the PWM inverter acts as a controlled fundamental current source, but its control characteristic is not ideal, moreover, the secondary terminal of the series transformer exhibits an interferential harmonic voltage, which has a great influence on the filtering effect. In this paper, the mathematical...
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.