Results 321 to 330 of about 1,772,274 (338)

Active Disturbance Rejection Controller for Speed Control of Electrical Drives Using Phase-Locking Loop Observer

IEEE transactions on industrial electronics (1982. Print), 2019
An active disturbance rejection control (ADRC) controller using phase-locking loop observer (PLLO) is proposed in this paper to improve the disturbance rejection property of speed control system.
Yuefei Zuo, Xiaoyong Zhu, L. Quan, Chao Zhang, Yi Du, Zixuan Xiang   +5 more
semanticscholar   +1 more source

Frequency locking in a periodically forced thermal two-phase oscillator

Dynamics of Atmospheres and Oceans, 1984
Abstract Welander (1977) showed that a fluid, heated internally and cooled to freezing from above, can for a certain parameter range and for steady thermal forcing demonstrate oscillatory behaviour with ice-covered and ice-free states alternating.
Peter Lundberg, Lars Rahm
openaire   +1 more source

Transaction Locks, Two-Phase Commit and Deadlocks

1998
Access to the database occurs within the framework of short and long transactions. As we have seen, each transaction consists of a sequence of operations on the database, with practically no pre-established limits to the time spent in a transaction or number of operations performed for its execution.
openaire   +1 more source

Frequency-following reference oscillator for a two-phase lock-in amplifier

Review of Scientific Instruments, 1979
The circuit for a frequency-following oscillator is described for use in obtaining a commensurate reference for a two-phase lock-in amplifier. This device is useful in tracking signals which drift slowly in frequency and which are apt to be either intermittent or momentarily small in amplitude, as in the Brownian motion of a mechanical oscillator ...
openaire   +2 more sources

Decentralization of Two Phase Locking based Protocols

Proceedings of the 31st International Symposium on High-Performance Parallel and Distributed Computing, 2022
Tatsuhiro Nakamori, Jun Nemoto, Takashi Hoshino, Hideyuki Kawashima   +3 more
openaire   +1 more source

Multi-Wait Two-Phase Locking Mechanism and Its Hardware Implementation

1988
In database systems concurrency control mechanisms are essential to realize efficient systems. In this paper an efficient concurrency control mechanism called “Multi-Wait Two-Phase Locking Mechanism” is introduced. Although the mechanism realizes higher concurrency than conventional mechanisms, the mechanism itself is complicated.
K. Saisho, Y. Kambayashi
openaire   +1 more source

Serializable executions with Snapshot Isolation and two-phase locking: Revisited

2013 ACS International Conference on Computer Systems and Applications (AICCSA), 2013
Snapshot Isolation (SI) is a concurrency control mechanism that has been implemented by several commercial and open resources platforms. However, under SI, a set of program may experience a non-serializable execution, in which database integrity constraints can be violated.
openaire   +1 more source

Vibration of two-phase local/nonlocal Timoshenko nanobeams with an efficient shear-locking-free finite-element model and exact solution

Engineering computations, 2020
M. Fakher, S. Hosseini-Hashemi
semanticscholar   +1 more source

Two-phase Anti-lock Braking System using Force Measurement

2010
The Anti-lock Braking System (ABS) is the most important active safety system for passenger cars. Thanks to force measurement, provided for example by the new SKF Load Sensing Hub Bearing Units, hybrid ABS algorithms can be made simpler and more robust than when only using wheel acceleration measurement.
M. Gerard, CORNO, MATTEO, M. Verhaegen, E. Holweg   +3 more
openaire   +1 more source

Comparing two-phase locking and optimistic concurrency control protocols in multiprocessor real-time databases

Proceedings of 5th International Workshop on Parallel and Distributed Real-Time Systems and 3rd Workshop on Object-Oriented Real-Time Systems, 1997
A. Chiu, B. Kao, K. Lam
semanticscholar   +1 more source