Wireless Body Area Network(WBAN)technologies are emerging with extensive applications in several domains.Health is a fascinating domain of WBAN for smart monitoring of a patient’s condition.An important factor to con...Wireless Body Area Network(WBAN)technologies are emerging with extensive applications in several domains.Health is a fascinating domain of WBAN for smart monitoring of a patient’s condition.An important factor to consider in WBAN is a node’s lifetime.Improving the lifetime of nodes is critical to address many issues,such as utility and reliability.Existing routing protocols have addressed the energy conservation problem but considered only a few parameters,thus affecting their performance.Moreover,most of the existing schemes did not consider traffic prioritization which is critical in WBANs.In this paper,an adaptive multi-cost routing protocol is proposed with a multi-objective cost function considering minimum distance from sink,temperature of sensor nodes,priority of sensed data,and maximum residual energy on sensor nodes.The performance of the proposed protocol is compared with the existing schemes for the parameters:network lifetime,stability period,throughput,energy consumption,and path loss.It is evident from the obtained results that the proposed protocol improves network lifetime and stability period by 30%and 15%,respectively,as well as outperforms the existing protocols in terms of throughput,energy consumption,and path loss.展开更多
大规模虚拟电厂(virtual power plant,VPP)逐步具备与传统发电资源对等的地位,其优化运行策略将显著影响电力市场的均衡状态。高效表征虚拟电厂在关键端口下的外特性将促进虚拟电厂与现有市场模式的有效兼容,对于其深度参与电力市场具...大规模虚拟电厂(virtual power plant,VPP)逐步具备与传统发电资源对等的地位,其优化运行策略将显著影响电力市场的均衡状态。高效表征虚拟电厂在关键端口下的外特性将促进虚拟电厂与现有市场模式的有效兼容,对于其深度参与电力市场具有十分重要的现实意义。基于改进多参数线性规划(multi-parametric linear programming,MPLP)理论提出虚拟电厂边际成本函数解析表征方法,通过虚拟电厂与主网在公共连接点(point of common coupling,PCC)处的交易电量这一低维参数,反映其整体灵活性、交易可行域及边际成本。基于成本最小化将初始参数空间优化分割为若干临界域(critical region,CR),随后,揭示优化分割的经济学特性,并利用该特性刻画参数空间与虚拟电厂成本的分段映射关系。最后,基于改进的IEEE 33及IEEE 123节点系统验证所提算法的有效性,为虚拟电厂以非迭代的方式参与市场出清提供理论基础。展开更多
文摘Wireless Body Area Network(WBAN)technologies are emerging with extensive applications in several domains.Health is a fascinating domain of WBAN for smart monitoring of a patient’s condition.An important factor to consider in WBAN is a node’s lifetime.Improving the lifetime of nodes is critical to address many issues,such as utility and reliability.Existing routing protocols have addressed the energy conservation problem but considered only a few parameters,thus affecting their performance.Moreover,most of the existing schemes did not consider traffic prioritization which is critical in WBANs.In this paper,an adaptive multi-cost routing protocol is proposed with a multi-objective cost function considering minimum distance from sink,temperature of sensor nodes,priority of sensed data,and maximum residual energy on sensor nodes.The performance of the proposed protocol is compared with the existing schemes for the parameters:network lifetime,stability period,throughput,energy consumption,and path loss.It is evident from the obtained results that the proposed protocol improves network lifetime and stability period by 30%and 15%,respectively,as well as outperforms the existing protocols in terms of throughput,energy consumption,and path loss.
文摘大规模虚拟电厂(virtual power plant,VPP)逐步具备与传统发电资源对等的地位,其优化运行策略将显著影响电力市场的均衡状态。高效表征虚拟电厂在关键端口下的外特性将促进虚拟电厂与现有市场模式的有效兼容,对于其深度参与电力市场具有十分重要的现实意义。基于改进多参数线性规划(multi-parametric linear programming,MPLP)理论提出虚拟电厂边际成本函数解析表征方法,通过虚拟电厂与主网在公共连接点(point of common coupling,PCC)处的交易电量这一低维参数,反映其整体灵活性、交易可行域及边际成本。基于成本最小化将初始参数空间优化分割为若干临界域(critical region,CR),随后,揭示优化分割的经济学特性,并利用该特性刻画参数空间与虚拟电厂成本的分段映射关系。最后,基于改进的IEEE 33及IEEE 123节点系统验证所提算法的有效性,为虚拟电厂以非迭代的方式参与市场出清提供理论基础。
