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Elasticity mechanism is the important feature of infrastructure clouds, which can add or remove resources to adapt the workload change. The elasticity mechanism impacts the quality of service and service level agreement. However, the performance of elasticity is hard to quantity. There are no efficient benchmarks to evaluate the elasticity mechanism. Exiting methods haven't considerate the different...
Due to the demand of pursuing a main memory with larger data bandwidth, higher data density, and lower power, the specification of DRAM has been constantly evolved in the past decade. The new DRAM specifications support multiple operating modes with multiple timing settings. It then becomes computationally infeasible to exhaustively validate all the combinations of different operating modes, timing...
This paper focuses on a nonlinear on-line learning control system with some priori knowledge that can be represented with the functions of the gain scheduling. For this, we develop the Gain-Scheduling direct Heuristic Dynamic Programming (GSHDP) controller that is based on the fundamental principle of reinforcement learning. In order to improve the convergence speed of the on-line learning, DL-RM...
Firstly, the design and experiments of three-electrode field distortion gas switch and two-electrode gas switch are presented. The switches diameter is 90 mm. The length of three-electrode switch is 75 mm, and the length of two-electrode switch is 62 mm. The effect of variations in the gas pressure, gap, and gas component on self-breakdown voltage of the switches has been experimentally studied. The...
Microgrid is a newly proposed organization of distributed generation system. It can operate in net-connected mode and islanded mode, when the operation switches between the two types of mode, the variety power will emerge. If this happens, the level of the system voltage will be fluctuating in a wide range, and the system frequency will also be fluctuating in an unacceptable range. The load power...
Based on analysis of the case of the saddle-node bifurcation and the limit-induced bifurcation, a new method for identifying and calculation bifurcation points in steady-state voltage stability analysis is presented. By using continuation power flow based on piecewise linear load prediction curve, in which the load increasing directions are determined by load prediction curve, it go through the collapse...
Based on the mechanism of VSCF wind turbine in capturing the largest wind, the capturing methods for the largest wind energy are summarized such as the control of the tip speed ratio,, mountaineering search method and three points comparative method. The advantages and disadvantages of the study of those are pointed out. At last the developments of VSCF wind turbine With ADRC in capturing the largest...
This paper presents a new optimal power flow model based on the algorithm of Imputation of an impedance-branch dissipation power. The complex nonlinear constrained expression of line security and stability constraints in optimal power flow model is transformed into an approximate linear expression in which generator power output serves as a variable. This model is solved by successive or piecewise...
A boost converter with buck-store and boost-restore (BSBR) technique fabricated by 0.25 mum CMOS BCD process can provide different supply voltages to drive series red, green, and blue LEDs in sequence for reducing the power consumption on the constant current generator. The proposed technique not only stores and restores extra energy during the transient time of the reference tracking response to...
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