Asynchronous operation

Abstract: In this article, the event-triggered asynchronous control problem of nonlinear multiagent systems is investigated based on Takagi–Sugeno fuzzy models In order to rationally utilize network resources and elaborately avoid unnecessary continuous monitoring, an event-triggered mechanism with a new dynamic threshold parameter and a sampler are considered, respectively Besides, an asynchronous operation method is adopted to deal with the mismatched premise variables between the fuzzy system and fuzzy controller Based on the Lyapunov stability theory and appropriate inequality, some sufficient criteria in the form of linear matrix inequalities are obtained to ensure the stability of the closed-loop system Finally, an illustrative example is provided to demonstrate the effectiveness and superiority of the proposed method

Abstract: To help create a true sense of presence in a virtual reality experience, a so called "time warp" may be used. This time warp does not only correct for the optical aberration of the lenses used in a virtual reality headset, it also transforms the stereoscopic images based on the very latest head tracking information to significantly reduce the motion-to-photon delay (or end-to-end latency). The time warp operates as close as possible to the display refresh, retrieves updated head tracking information and transforms a stereoscopic pair of images from representing a view at the time it was rendered, to representing the correct view at the time it is displayed. When run asynchronously to the stereoscopic rendering, the time warp can be used to increase the perceived frame rate and to smooth out inconsistent frame rates. Asynchronous operation can also improve the overall graphics hardware utilization by not requiring the stereoscopic rendering to be synchronized with the display refresh cycle. However, on today's consumer hardware it is challenging to implement a high quality time warp that is fast, has predictable latency and throughput, and runs asynchronously. This paper discusses the various challenges and the different trade-offs that need to be considered when implementing an asynchronous time warp on consumer hardware.

Abstract: A mechanism for communicating messages, each including a command and a response, in a network having central processing complexes (CPCs) and one or more coupling facilities. Each coupling facility has a central processor for executing instructions and a main storage. Messages are sent from a message control block in the main storage of the CPC sending the message, and the response to the message is received in a message response block of the CPC without an interrupt to the program being executed by the central processor of the CPC. Each message from a CPC to the coupling facility may include a command and an indicator bit which instructs the coupling facility to execute the command either in synchronism with or asynchronously to the execution of the sending processor. The coupling facility executes the command and returns a response which is received in a message response block of the main storage of the sending CPC without an interrupt to any program being executed by the central processor of that CPC.

Abstract: The "one-hot" row assignment for asynchronous circuits, in which every row in a flow table has exactly one of the feedback variables that equals the value 1, provides a straightforward method for circuit synthesis. Once a flow table has been constructed, the state equations can be directly written, without requiring any procedure to ensure a race-free assignment. Furthermore, it can implement any arbitrary fundamental mode asynchronous circuit, not depending on a specific signaling protocol for its correct operation. An alternate view of one-hot asynchronous circuits is given, with a simple set-reset flip-flop for each state. Although this may seem excessive compared to implementations with encoded state variables, for many circuits their one-hot implementation is comparable in cost to other asynchronous implementations.