船舶数据中心高效能调度算法

随着船舶数量的增长和数据信息的日益复杂,船舶在港口的周转时间变长,严重影响船舶航行效率和港口环境可持续性。本文对船舶数据中心高效能调度算法进行研究,基于混合整数线性规划模型对调度目标进行定义,提出结合MILP模型的自适应模拟退火算法流程,并对自适应模拟退火算法、遗传算法、模拟退火算法进行仿真对比,提出船舶数据的多层次编码方案。仿真结果表明高效能调度算法能够显著减少船舶的总等待时间,提高泊位利用率,并有效提升准时率。

提高全局资源调度和本地资源调度的效能的云计算资源调度方案分析

设计分析可以提高当前全局资源调度、本地资源调度效能的云计算资源调度方案。在云计算资源调度中,能够优化分析,提高全局资源调度和本地资源调度的效能的调度方案,分析调度方案设计需求,设计实现提升云计算资源调度效能。结果证实,在云计算资源调度方案设计中,确保提高全局资源调度和本地资源调度的效能,全局资源调度效能提高20%,提高本地资源调度效能达到32%,发挥积极影响。结论表达出在进行云计算资源调度方案设计中,优化设计其全局资源调度、本地资源调度,可以提升资源调度效能,有助于提升云计算资源调度方案质量,发挥实用价值。

Energy-efficient Traffic Grooming Under Sliding Scheduled Traffic Model for IP over WDM Optical Networks

In this paper,we investigate on the problem of energy-efficient traffic grooming under sliding scheduled traffic model for IP over WDM optical networks,so as to minimize the total energy consumption of the core network.We present a two-layer auxiliary graph model and propose a new energyefficient traffic grooming heuristic named Two-Dimension Green Traffic Grooming(TDGTG) algorithm,which takes both space and time factors into consideration for network energy efficiency.We compare our proposed TDGTG algorithm with the previous traffic grooming algorithms for scheduled traffic model in terms of total energy consumption and blocking probability.The simulation results in three typical carrier topologies show the efficiency of our proposed TDGTD algorithm.

Energy-efficient data transmission with non-ideal circuit power for downlink cellular networks

The downlink energy-efficient transmission schedule with non-ideal circuit power over Wreless networks involving a single transmitter and multiple receivers was investigated. According to the special structure of the problem, a novel algorithm called OOSCPMR （the optimal offine scheduling with non-ideal circuit power for multi-receivers） is proposed, and the optimal offine solutions to optimize the energy- efficient transmission policy are found. The packets to be transmitted can be divided into two types where one type of packet is determined to be transmitted using the enrgy- efficient tansmission time, and the other type of packet is determined by the ID moveright algorithm. Finally, an energy-efficient online schedule is developed based on te proposed OOSCPMR algoriAm. Simulation results show that the optima offline transmission schedule provides te lower bound performance for the online tansmission schedule. The proposed optimal offline and online policy is more energy efficient than the existing schemes tat assume ideal circuit power.

Virtual Machine Scheduling for Improving Energy Efficiency in laaS Cloud

In IaaS Cloud,different mapping relationships between virtual machines(VMs) and physical machines(PMs) cause different resource utilization,so how to place VMs on PMs to reduce energy consumption is becoming one of the major concerns for cloud providers.The existing VM scheduling schemes propose optimize PMs or network resources utilization,but few of them attempt to improve the energy efficiency of these two kinds of resources simultaneously.This paper proposes a VM scheduling scheme meeting multiple resource constraints,such as the physical server size(CPU,memory,storage,bandwidth,etc.) and network link capacity to reduce both the numbers of active PMs and network elements so as to finally reduce energy consumption.Since VM scheduling problem is abstracted as a combination of bin packing problem and quadratic assignment problem,which is also known as a classic combinatorial optimization and NP-hard problem.Accordingly,we design a twostage heuristic algorithm to solve the issue,and the simulations show that our solution outperforms the existing PM- or network-only optimization solutions.

Method of Evaluating Social Benefit of Energy-Conservation Based Generation Dispatching in Guangdong Province

Energy-conservation based generation dispatching is the revolutionary change in operation mode which could reduce energy consumption and pollutant emissions, promote power industry restructuring, and achieve sustainable development. Social benefit evaluation of the energy-conservation based generation dispatching under the new situation and environment has come into being as an important theoretical issue. A new scenario analysis based social benefit evluating method, which is implemented by comparing the energy., consumption and pollutant emissions of different scenarios defined by the key indicators, i.e., load factor and coal consumption structure, is proposed in the paper. Then the composition of social benefit is analyzed from the point of the dispatching mode and the coal consumption structure. The method proposed is of clear physical meaning. It is not only practical, but also applicable for the implementation of energy-conservation based generation dispatching in diffferent phases and with different goals.