无线传感器网络是由部署在观测环境附近大量的廉价的微型传感器节点组成的无线网络,它具有分布式处理带来的高监测精度、高容错性、大覆盖区域、可远程监控等众多优点,同时也存在着严重的节点能量约束问题。文章首先简介了几种典型的节...无线传感器网络是由部署在观测环境附近大量的廉价的微型传感器节点组成的无线网络,它具有分布式处理带来的高监测精度、高容错性、大覆盖区域、可远程监控等众多优点,同时也存在着严重的节点能量约束问题。文章首先简介了几种典型的节能协议,并分析了这些协议的优缺点,提出了一种新的层次性无线传感器网络拓扑结构生成算法SSN(simulation of sensor network)。展开更多
针对MMC-HVDC系统,构建了基于状态空间节点解算器(SSN)的改进RT-LAB仿真模型。该模型集成了基于FPGA亚微秒级M M C阀组仿真技术和基于SSN的背靠背系统及其相关交流电网仿真技术的优点与功能,可以实时模拟背靠背柔性直流输电系统的各种...针对MMC-HVDC系统,构建了基于状态空间节点解算器(SSN)的改进RT-LAB仿真模型。该模型集成了基于FPGA亚微秒级M M C阀组仿真技术和基于SSN的背靠背系统及其相关交流电网仿真技术的优点与功能,可以实时模拟背靠背柔性直流输电系统的各种稳态和暂态运行工况,从而可以用于MMC的启动与充电控制策略研究及避雷器抑制直流单极短路过电压的效率研究。对背靠背MMC-HVDC算例的仿真验证了该模型的有效性。展开更多
The paper primarily focuses on social safety nets and their effectiveness in poverty alleviation.Social Safety Net(SSN)programs pertain to social service initiatives aimed at providing temporary assistance to individu...The paper primarily focuses on social safety nets and their effectiveness in poverty alleviation.Social Safety Net(SSN)programs pertain to social service initiatives aimed at providing temporary assistance to individuals or groups facing vulnerabilities or unexpected hardships,such as those with lower incomes.Poverty poses a significant obstacle to the progress of social development,and its impacts are worsened by various factors including insecurity,frequent flooding,and droughts in Somalia.A total of 342 households in the Banadir region of Somalia were interviewed for the social safety nets(SSN)study.Data collection in the study was facilitated through the utilization of Kobo Toolbox,while the data analysis was conducted using EViews v.12.The results obtained from the ADP and PP tests indicated that all variables exhibited stationarity at the level.The Impact Assessment(IA)reveals a positive correlation with Household Income and Poverty Indices(HIPI),suggesting a risk of dependency without a strategic exit strategy,potentially leading to a 26%increase in poverty levels.A well-executed Program Implementation and Design(PID)can result in a 33%increase in income and poverty indices.Recipients perceive the Social Safety Net(PSSN)as reducing poverty and increasing income by 11%.Therefore,the study recommends integrating beneficiaries into the urban economy through sustainable livelihood options.Finally,the Somali government should prioritize the implementation of sustainable livelihood programs to mitigate dependency and alleviate poverty among SSN beneficiaries.展开更多
文摘无线传感器网络是由部署在观测环境附近大量的廉价的微型传感器节点组成的无线网络,它具有分布式处理带来的高监测精度、高容错性、大覆盖区域、可远程监控等众多优点,同时也存在着严重的节点能量约束问题。文章首先简介了几种典型的节能协议,并分析了这些协议的优缺点,提出了一种新的层次性无线传感器网络拓扑结构生成算法SSN(simulation of sensor network)。
文摘针对MMC-HVDC系统,构建了基于状态空间节点解算器(SSN)的改进RT-LAB仿真模型。该模型集成了基于FPGA亚微秒级M M C阀组仿真技术和基于SSN的背靠背系统及其相关交流电网仿真技术的优点与功能,可以实时模拟背靠背柔性直流输电系统的各种稳态和暂态运行工况,从而可以用于MMC的启动与充电控制策略研究及避雷器抑制直流单极短路过电压的效率研究。对背靠背MMC-HVDC算例的仿真验证了该模型的有效性。
文摘The paper primarily focuses on social safety nets and their effectiveness in poverty alleviation.Social Safety Net(SSN)programs pertain to social service initiatives aimed at providing temporary assistance to individuals or groups facing vulnerabilities or unexpected hardships,such as those with lower incomes.Poverty poses a significant obstacle to the progress of social development,and its impacts are worsened by various factors including insecurity,frequent flooding,and droughts in Somalia.A total of 342 households in the Banadir region of Somalia were interviewed for the social safety nets(SSN)study.Data collection in the study was facilitated through the utilization of Kobo Toolbox,while the data analysis was conducted using EViews v.12.The results obtained from the ADP and PP tests indicated that all variables exhibited stationarity at the level.The Impact Assessment(IA)reveals a positive correlation with Household Income and Poverty Indices(HIPI),suggesting a risk of dependency without a strategic exit strategy,potentially leading to a 26%increase in poverty levels.A well-executed Program Implementation and Design(PID)can result in a 33%increase in income and poverty indices.Recipients perceive the Social Safety Net(PSSN)as reducing poverty and increasing income by 11%.Therefore,the study recommends integrating beneficiaries into the urban economy through sustainable livelihood options.Finally,the Somali government should prioritize the implementation of sustainable livelihood programs to mitigate dependency and alleviate poverty among SSN beneficiaries.
