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.
To provide an early warning of failure for cost effective maintenance to extend the life of electronic systems, there is a growing interest to perform prognostics and health management. This paper provides a review of various prognostics and health management approaches that involve sensing, parameter interpretation, anomaly detection, weak components diagnosis, system health assessment, and remaining...
Fault detection is a critical task in condition-based maintenance of rolling element bearings. In many applications unsupervised learning techniques are preferred in fault detection due to the lack of training data. Unsupervised learning techniques such as k-means clustering are most widely used in machinery health monitoring. These methods face two challenges: firstly, they cannot cluster non-convex...
Radio Frequency Identification (RFID) is an emerging technology which brings enormous productivity benefits in applications where objects have to be identified automatically. RFID data, however, have their own unique characteristics — including aggregation, location, temporal and history-oriented — which have to be fully considered and integrated into the RFID data model which is constructed for RFID...
Soybean saponin has a lot of physiological activities and pharmacological action and has been extensively used in health food and medicine. In this paper, an adsorption chromatographic method with a resin column was developed to obtain crude soybean saponins. After that, a silica column was used to separate crude soybean saponins and prepare group B soybean saponins which consist of soybean saponin...
In this paper, agricultural and hydrological drought definitions are adopted to estimate the severity of drought in northern China in recent years. Particularly crop transpiration as important parameter is added in the drought index algorithm. Land surface model Noah are used and driven by a combination of meteorological reanalysis dataset (NCEP GDAS) and high resolution precipitation (CMORPH) and...
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.