Aiming at the issue of the selectivity of routing protocols between UAV groups, a comprehensive weighting evaluation system based on game theory is proposed. Taking network simulation data as an example, three protoco...Aiming at the issue of the selectivity of routing protocols between UAV groups, a comprehensive weighting evaluation system based on game theory is proposed. Taking network simulation data as an example, three protocols, AODV, DSDV, and OLSR, are selected as the research objects. The results show that the DSDV protocol is suitable for the simple communication environment between UAV groups, the AODV protocol is suitable for the complex communication environment between UAV groups. In addition, the evaluation system is compared with the two evaluation systems of the Covariance Analytic Hierarchy Process (Cov-AHP) and the entropy method to calculate the relative deviation. The comparison results show that the new evaluation system is more reasonable than the other two evaluation systems.展开更多
The importance of rural highway maintenance is self-evident, and it is also a basic work of the highway operation department. Selecting an appropriate evaluation method can timely and accurately find the pavement dise...The importance of rural highway maintenance is self-evident, and it is also a basic work of the highway operation department. Selecting an appropriate evaluation method can timely and accurately find the pavement diseases, and improve the timeliness of pavement repair. To improve the accuracy of pavement quality comprehensive evaluation, based on the game theory, the improved extension evaluation method was combined with subjective and objective weight determination methods in this paper, to propose a comprehensive weight determination method with a good operability.<span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">The results</span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">show that the improved extension evaluation method provid</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">es</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> a feasible scheme for rural highway maintenance quality evaluation</span></span></span>展开更多
为准确评价区域海事事故治理效果,通过构建动态综合评价模型,为水上交通安全规划提供决策依据。首先,从事故的绝对指标与相对指标角度出发,建立包含8个指标的区域海事事故治理效果评价指标体系。其次,使用博弈赋权法对熵权法所得权重和...为准确评价区域海事事故治理效果,通过构建动态综合评价模型,为水上交通安全规划提供决策依据。首先,从事故的绝对指标与相对指标角度出发,建立包含8个指标的区域海事事故治理效果评价指标体系。其次,使用博弈赋权法对熵权法所得权重和指标相关性权重确定法(Criteria Importance Through Intercriteria Correlation, CRITIC)所得权重进行组合,以确定各时段评价指标组合权重,并采用逼近理想解排序法(Technique for Order Preference by Similarity to Ideal Solution, TOPSIS)对各地区海事事故治理效果进行各时段静态综合评价。再次,通过混合时序算子集结各时段静态综合评价值,求得各地区海事事故治理效果的动态综合评价值,进而判断各地区海事事故的治理效果。最后,运用所建评价模型对2017—2021年上海、浙江、广东和山东4个地区海事事故治理效果进行动态综合评价。研究结果显示:与单一赋权TOPSIS法相比,博弈赋权-TOPSIS法所得静态综合评价结果更为合理可靠;与单一时序算子相比,混合时序算子所得动态综合评价结果更为合理可靠;随着海事事故治理策略和治理强度不同,上海和广东地区海事事故治理效果呈上升趋势,而浙江和山东地区海事事故治理效果呈下降趋势;广东地区海事事故治理效果稳定性最强,而浙江地区海事事故治理效果稳定性最弱;上海地区海事事故治理效果最好,而浙江地区海事事故治理效果最差。展开更多
The early detection of cascading failure plays an important role in the safe and stable operation of the power system with high penetration of renewable energy.This paper proposes a fault propagation dynamic model bas...The early detection of cascading failure plays an important role in the safe and stable operation of the power system with high penetration of renewable energy.This paper proposes a fault propagation dynamic model based on the epidemic model,and further puts forward a method to detect the development of cascading failures.Through the simulation of the IEEE 39-bus and 118-bus systems,this model is proven to be valid and capable of providing practical technical support for the prevention of cascading failures in power systems with high penetration of renewable energy.This paper also provides an analysis method for the choice of different protection and control measures at each stage of cascading failure,which has critical significance and follow-up value.展开更多
为了进一步提高电能质量评估结果的精细化程度,提出了一种基于灰色关联度分析(Grey Relational Analysis,GRA)、二元语义(Binary Semantics,BS)和逼近理想解排序法(Technique for Order Preference by Similarity to an Ideal Solution,...为了进一步提高电能质量评估结果的精细化程度,提出了一种基于灰色关联度分析(Grey Relational Analysis,GRA)、二元语义(Binary Semantics,BS)和逼近理想解排序法(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)的电能质量综合评估方法。首先建立电能质量综合评估指标体系;其次利用G1法确定主观权重,采用指标相关法(Criteria Importance Though Intercrieria Correlation,CITIC)确定客观权重,并引入博弈论优化主客观综合权重系数,得到各项指标的综合权重;然后使用TOPSIS方法计算监测点指标数据与各指标对应的最优、最劣解之间的欧氏距离,并结合灰色关联度计算出相对贴近度,将其作为确定电能质量等级的判据并进行一次评估;最后利用二元语义法对一次评估结果中电能质量等级相同的监测点进行更为精细的二次评估。仿真算例结果验证该方法的有效性和精细性。展开更多
文摘Aiming at the issue of the selectivity of routing protocols between UAV groups, a comprehensive weighting evaluation system based on game theory is proposed. Taking network simulation data as an example, three protocols, AODV, DSDV, and OLSR, are selected as the research objects. The results show that the DSDV protocol is suitable for the simple communication environment between UAV groups, the AODV protocol is suitable for the complex communication environment between UAV groups. In addition, the evaluation system is compared with the two evaluation systems of the Covariance Analytic Hierarchy Process (Cov-AHP) and the entropy method to calculate the relative deviation. The comparison results show that the new evaluation system is more reasonable than the other two evaluation systems.
文摘The importance of rural highway maintenance is self-evident, and it is also a basic work of the highway operation department. Selecting an appropriate evaluation method can timely and accurately find the pavement diseases, and improve the timeliness of pavement repair. To improve the accuracy of pavement quality comprehensive evaluation, based on the game theory, the improved extension evaluation method was combined with subjective and objective weight determination methods in this paper, to propose a comprehensive weight determination method with a good operability.<span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">The results</span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">show that the improved extension evaluation method provid</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">es</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> a feasible scheme for rural highway maintenance quality evaluation</span></span></span>
文摘为准确评价区域海事事故治理效果,通过构建动态综合评价模型,为水上交通安全规划提供决策依据。首先,从事故的绝对指标与相对指标角度出发,建立包含8个指标的区域海事事故治理效果评价指标体系。其次,使用博弈赋权法对熵权法所得权重和指标相关性权重确定法(Criteria Importance Through Intercriteria Correlation, CRITIC)所得权重进行组合,以确定各时段评价指标组合权重,并采用逼近理想解排序法(Technique for Order Preference by Similarity to Ideal Solution, TOPSIS)对各地区海事事故治理效果进行各时段静态综合评价。再次,通过混合时序算子集结各时段静态综合评价值,求得各地区海事事故治理效果的动态综合评价值,进而判断各地区海事事故的治理效果。最后,运用所建评价模型对2017—2021年上海、浙江、广东和山东4个地区海事事故治理效果进行动态综合评价。研究结果显示:与单一赋权TOPSIS法相比,博弈赋权-TOPSIS法所得静态综合评价结果更为合理可靠;与单一时序算子相比,混合时序算子所得动态综合评价结果更为合理可靠;随着海事事故治理策略和治理强度不同,上海和广东地区海事事故治理效果呈上升趋势,而浙江和山东地区海事事故治理效果呈下降趋势;广东地区海事事故治理效果稳定性最强,而浙江地区海事事故治理效果稳定性最弱;上海地区海事事故治理效果最好,而浙江地区海事事故治理效果最差。
基金supported by the National Natural Science Foundation of China under U22B6006。
文摘The early detection of cascading failure plays an important role in the safe and stable operation of the power system with high penetration of renewable energy.This paper proposes a fault propagation dynamic model based on the epidemic model,and further puts forward a method to detect the development of cascading failures.Through the simulation of the IEEE 39-bus and 118-bus systems,this model is proven to be valid and capable of providing practical technical support for the prevention of cascading failures in power systems with high penetration of renewable energy.This paper also provides an analysis method for the choice of different protection and control measures at each stage of cascading failure,which has critical significance and follow-up value.
文摘为了进一步提高电能质量评估结果的精细化程度,提出了一种基于灰色关联度分析(Grey Relational Analysis,GRA)、二元语义(Binary Semantics,BS)和逼近理想解排序法(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)的电能质量综合评估方法。首先建立电能质量综合评估指标体系;其次利用G1法确定主观权重,采用指标相关法(Criteria Importance Though Intercrieria Correlation,CITIC)确定客观权重,并引入博弈论优化主客观综合权重系数,得到各项指标的综合权重;然后使用TOPSIS方法计算监测点指标数据与各指标对应的最优、最劣解之间的欧氏距离,并结合灰色关联度计算出相对贴近度,将其作为确定电能质量等级的判据并进行一次评估;最后利用二元语义法对一次评估结果中电能质量等级相同的监测点进行更为精细的二次评估。仿真算例结果验证该方法的有效性和精细性。