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Recently, coflow has been proposed as a new abstraction to capture the communication patterns in a rich set of data parallel applications in data centers. Coflows effectively model the application-level semantics of network resource usage, so high-level optimization goals, such as reducing the transfer latency of applications, can be better achieved by taking coflows as the basic elements in network...
In this brief, a novel decoupling solution is proposed for the variable-geometry turbine (VGT) and exhaust gas recirculation (EGR) system of diesel engines based on the principle of active disturbance rejection control. This complex, double-input, double-output, VGT-EGR system is treated as two ideal, decoupled integrators for the purpose of control design, while all other dynamics that deviate from...
The feasibility of a systematic and effective control design for highly uncertain dynamic systems is tested on the well-known two-mass-spring benchmark problem, based on the active disturbance rejection control (ADRC) framework. The proposed solution is obtained in the absence of a detailed mathematical model, in contrast to all previous model-based solutions. In addition to meeting the design criteria,...
Data Center is now becoming an important facility for many applications (e.g, web search and retail). As TCP can't meet applications' demands for latency and throughput, many tcp-based protocols (e.g, DCTCP, D2TCP, L2DCT) have been proposed. Among them, protocols such as D2TCP incorporate explicit deadline into congestion window adjustment procedure to guarantee flows' latency and protocols such as...
In typical data center networks, an overwhelming majority of the flows are smaller than 200 KB in size, while most transmitted bytes are from a small fraction of large flows. The small flows are usually from the applications interacting with end users, thus they require small completion times. Meanwhile, the data center owners hope to keep the high throughput of the network to make full use of their...
In this paper, a novel control solution is proposed and validated, for the decoupling control of variable geometry turbine (VGT) and exhaust gas recirculation (EGR) system in diesel engines. The cross-coupling and dynamics variation are lumped together as total disturbance, estimated and cancelled in real time by active disturbance rejection control (ADRC). The static and dynamic feed-forward controllers...
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