作战效能指数是作战效能的综合性度量,是作战效能评估的基础。目前常用的两类作战效能指数,基于指标体系的指数可信度不高,基于效果的指数不能用于作战效能预测。针对这些问题,对基于效果的指数"作战能力损失比"进行改进,用&q...作战效能指数是作战效能的综合性度量,是作战效能评估的基础。目前常用的两类作战效能指数,基于指标体系的指数可信度不高,基于效果的指数不能用于作战效能预测。针对这些问题,对基于效果的指数"作战能力损失比"进行改进,用"重要性"代替"能力",用"概率损失"替代"实际损失",提出一种重要性损失概率比指数,即ILR指数(Ratio of Importance Loss Probability)。ILR指数是关于重要性、可行性和成本性的综合指数,弥补了作战能力损失交换比未考虑网络级重要性和不能用于作战效能预测的问题。实例验证了ILR指数的有效性。展开更多
针对交通运行指数(Traffic Performance Index,TPI)合理值取值问题,将宏观基本图(Mac⁃roscopic Fundamental Diagram,MFD)模型与交通运行指数模型相结合,提出理论效能最优交通指数的求解方法.首先,利用各等级道路交通流基本图模型,建立...针对交通运行指数(Traffic Performance Index,TPI)合理值取值问题,将宏观基本图(Mac⁃roscopic Fundamental Diagram,MFD)模型与交通运行指数模型相结合,提出理论效能最优交通指数的求解方法.首先,利用各等级道路交通流基本图模型,建立全路网MFD,寻找路网理论效能最优状态点;其次,以速度为连接,将该点映射至基于严重拥堵里程比的交通运行指数模型中,得到理论效能最优交通指数;最后,以北京市全路网及行政区为例进行实证研究.结果表明:全路网的理论效能最优交通指数为6.42,东城区、西城区、海淀区和朝阳区理论效能最优交通指数依次为6.86,6.80,6.76,4.58.朝阳区理论效能最优交通指数最低,其路网性能优于其他三区.该方法为交通管理和交通出行提供直观参考,并为制定交通管理政策提供理论支撑.展开更多
In order to accurately forecast the main engine fuel consumption and reduce the Energy Efficiency Operational Indicator(EEOI)of merchant ships in polar ice areas,the energy transfer relationship between ship-machine-p...In order to accurately forecast the main engine fuel consumption and reduce the Energy Efficiency Operational Indicator(EEOI)of merchant ships in polar ice areas,the energy transfer relationship between ship-machine-propeller is studied by analyzing the complex force situation during ship navigation and building a MATLAB/Simulink simulation platform based on multi-environmental resistance,propeller efficiency,main engine power,fuel consumption,fuel consumption rate and EEOI calculation module.Considering the environmental factors of wind,wave and ice,the route is divided into sections,the calculation of main engine power,main engine fuel consumption and EEOI for each section is completed,and the speed design is optimized based on the simulation model for each section.Under the requirements of the voyage plan,the optimization results show that the energy efficiency operation index of the whole route is reduced by 3.114%and the fuel consumption is reduced by 9.17 t.展开更多
文摘作战效能指数是作战效能的综合性度量,是作战效能评估的基础。目前常用的两类作战效能指数,基于指标体系的指数可信度不高,基于效果的指数不能用于作战效能预测。针对这些问题,对基于效果的指数"作战能力损失比"进行改进,用"重要性"代替"能力",用"概率损失"替代"实际损失",提出一种重要性损失概率比指数,即ILR指数(Ratio of Importance Loss Probability)。ILR指数是关于重要性、可行性和成本性的综合指数,弥补了作战能力损失交换比未考虑网络级重要性和不能用于作战效能预测的问题。实例验证了ILR指数的有效性。
文摘针对交通运行指数(Traffic Performance Index,TPI)合理值取值问题,将宏观基本图(Mac⁃roscopic Fundamental Diagram,MFD)模型与交通运行指数模型相结合,提出理论效能最优交通指数的求解方法.首先,利用各等级道路交通流基本图模型,建立全路网MFD,寻找路网理论效能最优状态点;其次,以速度为连接,将该点映射至基于严重拥堵里程比的交通运行指数模型中,得到理论效能最优交通指数;最后,以北京市全路网及行政区为例进行实证研究.结果表明:全路网的理论效能最优交通指数为6.42,东城区、西城区、海淀区和朝阳区理论效能最优交通指数依次为6.86,6.80,6.76,4.58.朝阳区理论效能最优交通指数最低,其路网性能优于其他三区.该方法为交通管理和交通出行提供直观参考,并为制定交通管理政策提供理论支撑.
文摘In order to accurately forecast the main engine fuel consumption and reduce the Energy Efficiency Operational Indicator(EEOI)of merchant ships in polar ice areas,the energy transfer relationship between ship-machine-propeller is studied by analyzing the complex force situation during ship navigation and building a MATLAB/Simulink simulation platform based on multi-environmental resistance,propeller efficiency,main engine power,fuel consumption,fuel consumption rate and EEOI calculation module.Considering the environmental factors of wind,wave and ice,the route is divided into sections,the calculation of main engine power,main engine fuel consumption and EEOI for each section is completed,and the speed design is optimized based on the simulation model for each section.Under the requirements of the voyage plan,the optimization results show that the energy efficiency operation index of the whole route is reduced by 3.114%and the fuel consumption is reduced by 9.17 t.
