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.
Geology, stratigraphy, drilling, logging, biomarker studies and apatite fission tracks were used to study Sinian- Ordovician mudstone and reservoir bitumen extracted from exploration wells located in central and southeastern Sichuan. This analysis confirms the source rocks were located in a reducing sedimentary environment, with organic matter such as bacteria and algae. The bitumen found in Sinian-Ordovician...
Based on the characteristics of nonholonomic constraints and the principle of nonlinear control, this paper proposes a structural scheme of multi-joint underactuated manipulator and the method of chained form transformation. It also presents the design of a multi-joint underactuated manipulator which can be transformed into a chained-form system and the analysis indicates its underactuated property...
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.