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.
As aging coal-fired capacity retires following EPA rules, some RTO/ISOs are facing tightening supply margins, and seldom-used emergency only resources such as Load Modifying Resource may have to be deployed. The injection of emergency capacity, however, can result in price depression, and the uneconomic price signals may further lead to participant actions that endanger reliable grid operations. It...
In this paper, the reliability prediction approaches and flowchart based on PoF(Physics-of-Failure) of mechanical structure and system under multi-mechanism are discussed. Nowadays, the structure and load condition of mechanical products become more and more complicated, and the failure mode becomes more difficult to identify. It is necessary to use PoF method to build model and analysis failure problem...
With rapid development of internet, more and more consumers choose to shop from different channels, such as offline channel and online channel. Some consumers prefer shopping through offline channel because they want to experience the products' quality in person, while other consumers would like to shop online because they care more about the efficiency of shopping. There are several factors that...
The nursing students' perceptions of instructor caring (NSPIC) is an instrument to assess the influence of caring interactions between students and faculty on students' ability to care. However, the validity and reliability of the Chinese version has not yet been studied.The study aimed to assess the validity and reliability of the Chinese version of NSPIC (C-NSPIC).This is a cross-sectional study...
The reliability of wing structure plays an important role in the safety of a plane. Under external loads, there may be some failures in the wing structure, including flaw, crack, wearing and so on. It is essential to make FMEA (failure mode effect analysis) for the wing structure to find and deal with the failures. In order to give some advice on optimal design of the wing structure, it is necessary...
Demand response (DR) is the outreach of demand side management (DSM) in competitive electricity markets. With price signals and incentive mechanisms, DR is crucial to both power system reliability and market efficiency. Based on DR research and experiences around the world, comprehensive research on DR in electricity markets is conducted, including its definition, classification, implementation mechanisms,...
To speed up the construction of urban distribution network investment, a good way is to improve the reliability of grid power supply and the level of electric terminal safety. Electric power system is an organic whole, while urban distribution network has a large-scale investment. Under the constraint of total amount of investment, how to arrange the proportion of the investment between different...
This paper presents a general mechanical system reliability modeling and analysis method, which consider the correlations of failure modes. Firstly, the performance functions which mathematically represent the failure modes are linearized based on FORM (First Order Reliability Methods), and the correlation coefficient matrix of those functions is calculated. Then, the PFTA (Probabilistic Fault Tree...
The time-dependence and randomness behavior of wear process were studied, it was found that this process was essentially a random process. Based on the empirical equation or regression equation, the basic flow on how to establish the model of wear random process was established. The distributed function of wear extent at any time has been deduced, so the life expectance of wear structural component...
This is a summary of the presentation in the panel session on blackouts for the 2008 IEEE PES General Meeting. This presentation will discuss the state of the art methodologies for the prevention of cascaded events in blackouts. A new topic concerning the identification of basic patterns of cascaded events following a contingency will be included.
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.