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Existing data center transport protocols are usually based on the Processor Sharing (PS) policy and/or the Shortest Remaining Processing Time (SRPT) policy. PS divides link bandwidth equally between competing flows, thus it fails to achieve optimal average flow completion time (FCT). SRPT prioritizes flows that have the shortest remaining processing time and provides near-optimal average FCT, but...
One of the challenges for using metamodels in Model Driven Engineering is to automatically generate metamodel instances. Each instance should satisfy many constraints defined by a metamodel. Such instances can then be used for verifying or validating metamodels. Recent studies have already shown that this can be tackled by using SAT/SMT solvers. However, such instance generation does not take coverage...
A low noise and wide tuning range integrated phase-locked loop (PLL) was proposed. Besides careful design of the low noise and wide tuning range voltage-controlled oscillator, a large loop bandwidth was chosen to suppress the phase jitter contributed by the voltage-controlled oscillator. In addition, a charge pump capable of improving the switching time mismatch and the dynamic current mismatch was...
Valve side lead exit is a key important part of converter transformer, by which bushing terminal connects with the transformer valve winding. Valve side lead exit consists of bushing terminal and surrounding barrier system, and it is usually installed in the bushing ascending flange where resin impregnated paper (RIP), oil impregnated paper (OIP) and transformer oil co-exist in the compact place....
Since 750 kV transmission lines locate in the high altitude areas of northwest China where the environment condition is comparatively severe, the electromagnetic environmental problems in substations appear to be more prominent. As can be seen from the field observation results of the in-service substation, the frequent or permanent presence of corona discharge is obvious adjacent to the corona rings...
In this paper, we study run-time reconfiguration problem for tolerating core failures on NoC many core platforms with following three objectives:(1) maintaining the maximal timing similarity between real-time embedded application' timing properties before and after the system reconfiguration, (2) guaranteeing to meet real-time embedded application's deadline requirements after system reconfiguration,...
This paper investigates the state estimation problem of Markovian Jump Linear Systems (MJLSs) with quantized measurements. A moving horizon Monte Carlo (MHMC) sampling method is proposed in this paper to solve the state estimation problem. Both the state and the possibility of the mode are estimated at each instant. The proposed method makes full use of the statistical knowledge of the mode jumping...
GSM-R (GSM for Railway) network is a professional cellular network which is used for railway transportation. Unlike mobiles with low speed in regular GSM network, in GSM-R network the signals received by mobiles on high speed trains may suffer severe Doppler shift and other interferences. In this paper, a novel handover scheme based on train index in GSM-R network is proposed. This method makes use...
Switched reluctance motor (SRM) is a new type of speed adjustment motor. The control system of 8/6 pole switched reluctance motor is designed based on ARMS3C2410 central processor in this paper. The self-adjusting PID arithmetic control strategy is adopted in this system, the method of fixed angle current chopping control on low-speed and varying angle voltage chopping control on high-speed is used...
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