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In this paper, the cloud services optimization problem considering energy consumption cost is discussed. The queue model is presented for customer request service on data center. Since the server energy utility is based on the CPU core frequency, the novel trade-off optimization model between services revenue and energy loss cost is proposed in the paper, including allocating the dynamic CPU frequency...
Soft sinking mattress is one of the most used and efficient components in protective for scour prevention. During sinking, breaking of ship cable, tear of mattress cloth, deformation and cracking of clasping beam are all possible because the forces of the load on the mattress body are not recognized.[1] A mathematical model of soft sinking mattress is presented, which can be used to determine the...
The parameter of permanent magnet synchronous motor reveals uncertainty in actual modeling, which leads to the limit of differential geometry theory in control. In this paper, the differential geometry and sliding mode variable structure are integrated to solve the problem. Firstly, the basic condition of sliding mode existing is discussed. Then a kind of variable structure controller is designed...
There is an increasingly concern with the use of retrospective power. Some researchers suggested calculating the retrospective power after conducting hypothesis testing, particularly in meta-analysis. They considered that retrospective power can be used to determine whether the sample size is sufficient in an experiment and that the combination of retrospective power and prior power can enhance the...
<para> The transverse-mode competition and beam quality modeling in scaling fiber-coupled laser diode (LD) end-pumped lasers to higher power and better beam quality have been investigated with the space-dependent multimode rate equations by including the thermal effect. The total photon number and threshold of the pumping rate for each mode in the cavity were obtained by solving these equations...
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