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.
This paper studies the consensus problem for a class of nonlinear multi-agent systems with communication constraints. By designing a suitable distributed cooperative controller, all followers synchronize to the leader asymptotically if the communication rate is larger than a threshold value for each time interval. Meanwhile, the switching topology is considered, which is more coincident with the real...
A new series of chiral phosphite ligands derived from readily available l-(+)-tartaric acid and binaphthol derivatives were designed and prepared in convenient synthetic routes. These ligands were successfully employed in the Cu-catalyzed asymmetric conjugate addition of organozincs to cyclic enones. The ligands bearing (R)- and (S)-binaphthol and/or 3,3′-bis(trimethylsilyl)-2,2′-dihydroxy-1,1′-binaphthol...
Incremental contour fusion plays a very important role in updating topographic database. The most popular fusion methods in current use depend on manual work basically, in which it results in large workload, low efficiency and it can't ensure the quality of the spatial data. Therefore, the automatization of contour fusion should be developed exactly. Topological relation between unchanged contour...
Existing collaborative development systems for design, simulation and optimization adopt tight integration model, thus the collaborative components are difficult to join and exit dynamically, causing inconvenience for dynamic adjustment of the collaborative development system. The concept of High Level Architecture (HLA) federation has been proved to be an effective architecture for distributed dynamic...
Distributed GIS system's data security, especially access control, has become an indispensable function component in the practical application of distributed system. However, current approaches to access control are mostly based on individual user identity; hence they do not scale to distributed systems. In this paper, a new access control mechanism which is the combination of trust and role-based...
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.