首页 > 最新文献

Electronic Research Archive最新文献

英文 中文
Energy-to-peak control for switched systems with PDT switching PDT开关系统的能量-峰值控制
IF 0.8 4区 数学 Q1 MATHEMATICS Pub Date : 2023-01-01 DOI: 10.3934/era.2023268
Jingjing Dong, Xiaofeng Ma, Lan He, Xin Huang, Jianping Zhou
This paper investigates the issue of energy-to-peak control for continuous-time switched systems. A generalized switching signal, known as persistent dwell-time switching, is considered. Two different strategies for state-feedback controller design are proposed, using distinct Lyapunov functions and a few decoupling techniques. The critical distinction between these two strategies lies in their temporal characteristics: one is time-independent, while the other is quasi-time-dependent. Compared to the former, the latter has the potential to be less conservative. The validity of the proposed design strategies is demonstrated through an example.
研究了连续时间切换系统的能量到峰值控制问题。考虑了一种广义的开关信号,称为持久驻留时间开关。利用不同的李雅普诺夫函数和一些解耦技术,提出了两种不同的状态反馈控制器设计策略。这两种策略的关键区别在于它们的时间特征:一种是时间无关的,而另一种是准时间相关的。与前者相比,后者有可能不那么保守。通过算例验证了所提设计策略的有效性。
{"title":"Energy-to-peak control for switched systems with PDT switching","authors":"Jingjing Dong, Xiaofeng Ma, Lan He, Xin Huang, Jianping Zhou","doi":"10.3934/era.2023268","DOIUrl":"https://doi.org/10.3934/era.2023268","url":null,"abstract":"This paper investigates the issue of energy-to-peak control for continuous-time switched systems. A generalized switching signal, known as persistent dwell-time switching, is considered. Two different strategies for state-feedback controller design are proposed, using distinct Lyapunov functions and a few decoupling techniques. The critical distinction between these two strategies lies in their temporal characteristics: one is time-independent, while the other is quasi-time-dependent. Compared to the former, the latter has the potential to be less conservative. The validity of the proposed design strategies is demonstrated through an example.","PeriodicalId":48554,"journal":{"name":"Electronic Research Archive","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70247398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interactive complex ontology matching with local and global similarity deviations 基于局部和全局相似度偏差的交互式复杂本体匹配
IF 0.8 4区 数学 Q1 MATHEMATICS Pub Date : 2023-01-01 DOI: 10.3934/era.2023291
Xingsi Xue, Miao Ye
Ontology serves as a central technique in the semantic web to elucidate domain knowledge. The challenge of dealing with the heterogeneity introduced by diverse domain ontologies necessitates ontology matching, a process designed to identify semantically interconnected entities within these ontologies. This task is inherently complex due to the broad, diverse entities and the rich semantics inherent in vocabularies. To tackle this challenge, we bring forth a new interactive ontology matching method with local and global similarity deviations (IOM-LGSD) for ontology matching, which consists of three novel components. First, a local and global similarity deviation (LGSD) metrics are presented to measure the consistency of similarity measures (SMs) and single out the less consistent SMs for user validation. Second, we present a genetic algorithm (GA) based SM selector to evolve the SM subsets. Lastly, a problem-specific induced ordered weighting aggregating (IOWA) operator based SM aggregator is proposed to assess the quality of selected SMs. The experiment evaluates IOM-LGSD with the ontology alignment evaluation initiative (OAEI) Benchmark and three real-world sensor ontologies. The evaluation underscores the effectiveness of IOM-LGSD in efficiently identifying high-quality ontology alignments, which consistently outperforms comparative methods in terms of effectiveness and efficiency.
本体是语义网阐明领域知识的核心技术。处理由不同领域本体引入的异构性的挑战需要本体匹配,这是一个旨在识别这些本体中语义互连实体的过程。由于词汇表中广泛、多样的实体和丰富的语义,这项任务本身就很复杂。为了解决这一问题,我们提出了一种具有局部和全局相似偏差的交互式本体匹配方法(IOM-LGSD),该方法由三个部分组成。首先,提出了局部和全局相似性偏差(LGSD)度量来度量相似性度量(SMs)的一致性,并挑出一致性较差的SMs进行用户验证。其次,我们提出了一种基于遗传算法的SM选择器来进化SM子集。最后,提出了一种基于特定问题诱导有序加权聚合算子的短信聚合器,用于评价所选短信的质量。实验使用本体对齐评估倡议(OAEI)基准和三个现实世界的传感器本体对IOM-LGSD进行了评估。评估强调了IOM-LGSD在有效识别高质量本体对齐方面的有效性,该方法在有效性和效率方面始终优于比较方法。
{"title":"Interactive complex ontology matching with local and global similarity deviations","authors":"Xingsi Xue, Miao Ye","doi":"10.3934/era.2023291","DOIUrl":"https://doi.org/10.3934/era.2023291","url":null,"abstract":"Ontology serves as a central technique in the semantic web to elucidate domain knowledge. The challenge of dealing with the heterogeneity introduced by diverse domain ontologies necessitates ontology matching, a process designed to identify semantically interconnected entities within these ontologies. This task is inherently complex due to the broad, diverse entities and the rich semantics inherent in vocabularies. To tackle this challenge, we bring forth a new interactive ontology matching method with local and global similarity deviations (IOM-LGSD) for ontology matching, which consists of three novel components. First, a local and global similarity deviation (LGSD) metrics are presented to measure the consistency of similarity measures (SMs) and single out the less consistent SMs for user validation. Second, we present a genetic algorithm (GA) based SM selector to evolve the SM subsets. Lastly, a problem-specific induced ordered weighting aggregating (IOWA) operator based SM aggregator is proposed to assess the quality of selected SMs. The experiment evaluates IOM-LGSD with the ontology alignment evaluation initiative (OAEI) Benchmark and three real-world sensor ontologies. The evaluation underscores the effectiveness of IOM-LGSD in efficiently identifying high-quality ontology alignments, which consistently outperforms comparative methods in terms of effectiveness and efficiency.","PeriodicalId":48554,"journal":{"name":"Electronic Research Archive","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70247657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exponential projective synchronization analysis for quaternion-valued memristor-based neural networks with time delays 具有时滞的四元数忆阻器神经网络的指数投影同步分析
IF 0.8 4区 数学 Q1 MATHEMATICS Pub Date : 2023-01-01 DOI: 10.3934/era.2023285
Jun Guo, Yanchao Shi, Weihua Luo, Yanzhao Cheng, Shengye Wang
The issues of exponential projective synchronization and adaptive exponential projective synchronization are analyzed for quaternion-valued memristor-based neural networks (QVMNNs) with time delays. Different from the results of existing decomposition techniques, a direct analytical approach is used to discuss the projection synchronization problem. First, in the framework of measurable selection and differential inclusion, the QVMNNs is transformed into a system with parametric uncertainty. Next, the sign function related to quaternion is introduced. Different proper control schemes are designed and several criteria for ascertaining exponential projective synchronization and adaptive exponential projective synchronization are derived based on Lyapunov theory and the properties of sign function. Furthermore, several corollaries about global projective synchronization are proposed. Finally, the reliability and validity of our results are substantiated by two numerical examples and its corresponding simulation.
分析了具有时滞的四元数值记忆电阻神经网络的指数投影同步和自适应指数投影同步问题。与现有分解方法的结果不同,本文采用直接解析的方法来讨论投影同步问题。首先,在可测量选择和差分包容的框架下,将qvmnn转化为具有参数不确定性的系统。其次,介绍了与四元数相关的符号函数。根据李雅普诺夫理论和符号函数的性质,设计了不同的适当控制方案,导出了确定指数投影同步和自适应指数投影同步的若干判据。在此基础上,提出了关于全局射影同步的若干推论。最后,通过两个数值算例和相应的仿真验证了所得结果的可靠性和有效性。
{"title":"Exponential projective synchronization analysis for quaternion-valued memristor-based neural networks with time delays","authors":"Jun Guo, Yanchao Shi, Weihua Luo, Yanzhao Cheng, Shengye Wang","doi":"10.3934/era.2023285","DOIUrl":"https://doi.org/10.3934/era.2023285","url":null,"abstract":"The issues of exponential projective synchronization and adaptive exponential projective synchronization are analyzed for quaternion-valued memristor-based neural networks (QVMNNs) with time delays. Different from the results of existing decomposition techniques, a direct analytical approach is used to discuss the projection synchronization problem. First, in the framework of measurable selection and differential inclusion, the QVMNNs is transformed into a system with parametric uncertainty. Next, the sign function related to quaternion is introduced. Different proper control schemes are designed and several criteria for ascertaining exponential projective synchronization and adaptive exponential projective synchronization are derived based on Lyapunov theory and the properties of sign function. Furthermore, several corollaries about global projective synchronization are proposed. Finally, the reliability and validity of our results are substantiated by two numerical examples and its corresponding simulation.","PeriodicalId":48554,"journal":{"name":"Electronic Research Archive","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70247876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of long-term maintenance decision for asphalt pavement based on analytic hierarchy process and network level optimization decision 基于层次分析法和网络级优化决策的沥青路面长期养护决策分析
IF 0.8 4区 数学 Q1 MATHEMATICS Pub Date : 2023-01-01 DOI: 10.3934/era.2023299
Jiuda Huang, Chao Han, Wuju Wei, Chengjun Zhao
In order to effectively mitigate the deterioration of pavement and roadbed, the need for extensive repairs and costly reconstruction ought to be minimized. Hence, this study introduces a novel approach towards long-term preservation of asphalt pavement, which conducts in-depth research on pavement maintenance decision-making using the decision tree method. The selection of appropriate decision-making indicators is based on their respective significance and the actual maintenance requirements, from which a comprehensive decision model for asphalt pavement maintenance is developed. By employing the Analytic Hierarchy Process (AHP) and a network-level optimization decision-making approach, this study investigates the allocation of maintenance decisions, structural preservation, optimal combinations of maintenance strategies, and fund allocation schemes. The result is the development of a project-level and network-level structural preservation decision optimization method. Furthermore, a decision-making module is designed to accompany this method, facilitating the visualization of comprehensive data and decision-making plans. This module enhances the effectiveness and efficiency of the decision-making process by providing a user-friendly interface and a clear presentation of data-driven insights and decision outcomes. The case study clearly proved the applicability and rationality of the long-term preservation strategy of structures based on intelligent decision-making, which laid the foundation for the sustainable development of pavement maintenance and development.
为了有效地减轻路面和路基的恶化,应该尽量减少大规模修理和昂贵重建的需要。因此,本研究引入了一种新的沥青路面长期养护方法,利用决策树方法对路面养护决策进行了深入研究。根据其各自的意义和实际养护要求,选择合适的决策指标,由此建立沥青路面养护综合决策模型。采用层次分析法和网络级优化决策方法,研究了维修决策的分配、结构保留、维修策略的最优组合和资金分配方案。建立了项目级和网络级结构保存决策优化方法。此外,该方法还设计了一个决策模块,便于综合数据和决策计划的可视化。该模块通过提供用户友好的界面和数据驱动的见解和决策结果的清晰呈现,提高了决策过程的有效性和效率。案例研究清楚地证明了基于智能决策的构筑物长期保护策略的适用性和合理性,为路面养护发展的可持续发展奠定了基础。
{"title":"Analysis of long-term maintenance decision for asphalt pavement based on analytic hierarchy process and network level optimization decision","authors":"Jiuda Huang, Chao Han, Wuju Wei, Chengjun Zhao","doi":"10.3934/era.2023299","DOIUrl":"https://doi.org/10.3934/era.2023299","url":null,"abstract":"In order to effectively mitigate the deterioration of pavement and roadbed, the need for extensive repairs and costly reconstruction ought to be minimized. Hence, this study introduces a novel approach towards long-term preservation of asphalt pavement, which conducts in-depth research on pavement maintenance decision-making using the decision tree method. The selection of appropriate decision-making indicators is based on their respective significance and the actual maintenance requirements, from which a comprehensive decision model for asphalt pavement maintenance is developed. By employing the Analytic Hierarchy Process (AHP) and a network-level optimization decision-making approach, this study investigates the allocation of maintenance decisions, structural preservation, optimal combinations of maintenance strategies, and fund allocation schemes. The result is the development of a project-level and network-level structural preservation decision optimization method. Furthermore, a decision-making module is designed to accompany this method, facilitating the visualization of comprehensive data and decision-making plans. This module enhances the effectiveness and efficiency of the decision-making process by providing a user-friendly interface and a clear presentation of data-driven insights and decision outcomes. The case study clearly proved the applicability and rationality of the long-term preservation strategy of structures based on intelligent decision-making, which laid the foundation for the sustainable development of pavement maintenance and development.","PeriodicalId":48554,"journal":{"name":"Electronic Research Archive","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70247894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mathematical modeling and simulation analysis of different structured cored wire feeding spheroidization by finite volume method 用有限体积法对不同结构的包芯丝喂料球化过程进行数学建模和仿真分析
IF 0.8 4区 数学 Q1 MATHEMATICS Pub Date : 2023-01-01 DOI: 10.3934/era.2023202
Huiming Wang, Yimin Shi, Xingshi He, Wenzhi Zhao
A three-dimensional dynamic heat transfer mathematical model of the process when cored wire feed in molten iron is established based on finite volume method (FVM). The calculation area is meshed with triangles and quadrilaterals to determine nodes and control volumes, and implicit time integration method is used to ensure the stability of calculating process. For exposing the dynamic heat transfer behavior, the variation of temperature field and explosion characteristics of cored wires are studied. In addition, the melt loss rate of the top end of cored wire and the correlation among melt explosion depth, molten iron temperature and feeding speed of cored wires are theoretically calculated. More importantly, the influence of different structures of cored wires on the absorption rate of magnesium are considered. The calculation results are in good agreement with the experimental data, which indicate that the existing theoretical model has good validity and can provide theoretical guidance for spheroidization process in molten iron.
基于有限体积法(FVM),建立了铁水中包芯线材进给过程的三维动态传热数学模型。计算区域采用三角形和四边形网格划分确定节点和控制体积,采用隐式时间积分法保证计算过程的稳定性。为了揭示芯线的动态传热行为,研究了芯线的温度场变化和爆炸特性。此外,还从理论上计算了包芯线材顶端的熔体损失率以及熔体爆炸深度、铁水温度和包芯线材送料速度之间的关系。更重要的是,考虑了不同芯线结构对镁吸收率的影响。计算结果与实验数据吻合较好,表明现有理论模型具有较好的有效性,可以为铁液球化过程提供理论指导。
{"title":"Mathematical modeling and simulation analysis of different structured cored wire feeding spheroidization by finite volume method","authors":"Huiming Wang, Yimin Shi, Xingshi He, Wenzhi Zhao","doi":"10.3934/era.2023202","DOIUrl":"https://doi.org/10.3934/era.2023202","url":null,"abstract":"A three-dimensional dynamic heat transfer mathematical model of the process when cored wire feed in molten iron is established based on finite volume method (FVM). The calculation area is meshed with triangles and quadrilaterals to determine nodes and control volumes, and implicit time integration method is used to ensure the stability of calculating process. For exposing the dynamic heat transfer behavior, the variation of temperature field and explosion characteristics of cored wires are studied. In addition, the melt loss rate of the top end of cored wire and the correlation among melt explosion depth, molten iron temperature and feeding speed of cored wires are theoretically calculated. More importantly, the influence of different structures of cored wires on the absorption rate of magnesium are considered. The calculation results are in good agreement with the experimental data, which indicate that the existing theoretical model has good validity and can provide theoretical guidance for spheroidization process in molten iron.","PeriodicalId":48554,"journal":{"name":"Electronic Research Archive","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70246286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comprehensive operating efficiency measurement of 28 Chinese airports using a two-stage DEA-Tobit method 基于两阶段DEA-Tobit方法的中国28个机场综合运营效率测度
IF 0.8 4区 数学 Q1 MATHEMATICS Pub Date : 2023-01-01 DOI: 10.3934/era.2023078
Ming Wei, Shao-yun Zhang, Bo Sun
This paper presents a two-stage method combining data envelopment analysis (DEA) and a Tobit model to analyze the comprehensive operating efficiency of 28 airports in China in 2016. At the first stage, the DEA-BCC (Banker-Charnes-Cooper) model was employed to obtain the comprehensive operating efficiency of the combination of flight departure punctuality, non-cancellations, landing bridge rates from the perspective of airport infrastructure, surrounding airspace, route layouts, flight volume and weather. At the second stage, a Tobit model was used to analyze the influence of nine input variables from four aspects on obtained comprehensive operating efficiency, ultimately providing a clear and straightforward basis for formulating and testing policies. The comprehensive operating efficiency with this combination was further compared with each of the three efficiencies respectively. The important findings included the following: (1) The comprehensive operation efficiencies of most airports were greater than the individual efficiency; (2) These four types of operation efficiencies for most airports did not achieved DEA validity (100% efficiency), except for six airports (i.e., Haikou, Dalian, Jinan, Fuzhou, Nanning and Lanzhou); (3) These factors affecting each of the four types of operation efficiencies were different in that the number of terminals, duration of impact and average daily inbound and outbound flights had a negative impact on airport operational efficiency, while the average number of overnight aircraft per day and peak hour sorties had positive effects.
本文采用数据包络分析(DEA)和Tobit模型相结合的两阶段方法,对2016年中国28个机场的综合运营效率进行了分析。第一阶段,采用DEA-BCC (Banker-Charnes-Cooper)模型,从机场基础设施、周边空域、航线布局、航班量和天气等角度,得到航班起飞正点率、不取消率、着陆桥率组合的综合运行效率。第二阶段采用Tobit模型,从四个方面分析9个输入变量对所获得的综合运营效率的影响,最终为政策的制定和检验提供清晰、直观的依据。并将该组合的综合运行效率分别与三种效率进行比较。研究发现:(1)大部分机场的综合运营效率大于单项运营效率;(2)除海口、大连、济南、福州、南宁、兰州6个机场外,其余机场的4类运营效率均未达到DEA有效性(100%效率);(3)影响四类运营效率的因素各不相同,航站楼数量、影响时间和日均进出港航班对机场运营效率有负向影响,日均过夜飞机数量和高峰小时架次对机场运营效率有正向影响。
{"title":"Comprehensive operating efficiency measurement of 28 Chinese airports using a two-stage DEA-Tobit method","authors":"Ming Wei, Shao-yun Zhang, Bo Sun","doi":"10.3934/era.2023078","DOIUrl":"https://doi.org/10.3934/era.2023078","url":null,"abstract":"This paper presents a two-stage method combining data envelopment analysis (DEA) and a Tobit model to analyze the comprehensive operating efficiency of 28 airports in China in 2016. At the first stage, the DEA-BCC (Banker-Charnes-Cooper) model was employed to obtain the comprehensive operating efficiency of the combination of flight departure punctuality, non-cancellations, landing bridge rates from the perspective of airport infrastructure, surrounding airspace, route layouts, flight volume and weather. At the second stage, a Tobit model was used to analyze the influence of nine input variables from four aspects on obtained comprehensive operating efficiency, ultimately providing a clear and straightforward basis for formulating and testing policies. The comprehensive operating efficiency with this combination was further compared with each of the three efficiencies respectively. The important findings included the following: (1) The comprehensive operation efficiencies of most airports were greater than the individual efficiency; (2) These four types of operation efficiencies for most airports did not achieved DEA validity (100% efficiency), except for six airports (i.e., Haikou, Dalian, Jinan, Fuzhou, Nanning and Lanzhou); (3) These factors affecting each of the four types of operation efficiencies were different in that the number of terminals, duration of impact and average daily inbound and outbound flights had a negative impact on airport operational efficiency, while the average number of overnight aircraft per day and peak hour sorties had positive effects.","PeriodicalId":48554,"journal":{"name":"Electronic Research Archive","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70244212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Edge detection of remote sensing image based on Grünwald-Letnikov fractional difference and Otsu threshold 基于gr<s:1> nwald- letnikov分数差和Otsu阈值的遥感图像边缘检测
IF 0.8 4区 数学 Q1 MATHEMATICS Pub Date : 2023-01-01 DOI: 10.3934/era.2023066
Chao Chen, Hua Kong, Bin Wu
With the development of remote sensing technology, the resolution of remote sensing images is improving, and the presentation of geomorphic information is becoming more and more abundant, the difficulty of identifying and extracting edge information is also increasing. This paper demonstrates an algorithm to detect the edges of remote sensing images based on Grünwald–Letnikov fractional difference and Otsu threshold. First, a convolution difference mask with two parameters in four directions is constructed by using the definition of the Grünwald–Letnikov fractional derivative. Then, the mask is convolved with the gray image of the remote sensing image, and the edge detection image is obtained by binarization with Otsu threshold. Finally, the influence of two parameters and threshold values on detection results is discussed. Compared with the results of other detectors on the NWPU VHR-10 dataset, it is found that the algorithm not only has good visual effect but also shows good performance in quantitative evaluation indicators (binary graph similarity and edge pixel ratio).
随着遥感技术的发展,遥感图像的分辨率不断提高,地貌信息的呈现也越来越丰富,边缘信息的识别和提取难度也越来越大。提出了一种基于gr nwald - letnikov分数差和Otsu阈值的遥感图像边缘检测算法。首先,利用gr nwald - letnikov分数阶导数的定义,构造了一个四个方向上有两个参数的卷积差分掩模。然后,将掩模与遥感图像的灰度图像进行卷积,利用Otsu阈值进行二值化得到边缘检测图像。最后讨论了两个参数和阈值对检测结果的影响。与其他检测器在NWPU VHR-10数据集上的检测结果进行比较,发现该算法不仅具有良好的视觉效果,而且在定量评价指标(二值图相似度和边缘像素比)上也表现出良好的性能。
{"title":"Edge detection of remote sensing image based on Grünwald-Letnikov fractional difference and Otsu threshold","authors":"Chao Chen, Hua Kong, Bin Wu","doi":"10.3934/era.2023066","DOIUrl":"https://doi.org/10.3934/era.2023066","url":null,"abstract":"With the development of remote sensing technology, the resolution of remote sensing images is improving, and the presentation of geomorphic information is becoming more and more abundant, the difficulty of identifying and extracting edge information is also increasing. This paper demonstrates an algorithm to detect the edges of remote sensing images based on Grünwald–Letnikov fractional difference and Otsu threshold. First, a convolution difference mask with two parameters in four directions is constructed by using the definition of the Grünwald–Letnikov fractional derivative. Then, the mask is convolved with the gray image of the remote sensing image, and the edge detection image is obtained by binarization with Otsu threshold. Finally, the influence of two parameters and threshold values on detection results is discussed. Compared with the results of other detectors on the NWPU VHR-10 dataset, it is found that the algorithm not only has good visual effect but also shows good performance in quantitative evaluation indicators (binary graph similarity and edge pixel ratio).","PeriodicalId":48554,"journal":{"name":"Electronic Research Archive","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70244415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on the storage stability performance enhancement mechanism of graphene on rubber-modified asphalt based on size effect 基于尺寸效应的石墨烯在橡胶改性沥青上储存稳定性性能增强机理研究
IF 0.8 4区 数学 Q1 MATHEMATICS Pub Date : 2023-01-01 DOI: 10.3934/era.2023105
Yutong Xie, Yingli Gao, M. Liao, Weiwei Tian
The application of waste rubber powder (WRP) for asphalt pavement could achieve the harmless and resourceful utilization of solid waste, but the storage stability of waste rubber powder modified asphalt (RA) is one of the main problems restricting its application. Existing studies have demonstrated that graphene could enhance the storage stability of RA, but graphene's size effect on the modifying effect and its corresponding mechanism are still uncertain. In this research, the effects of graphene microstructural properties (i.e., molecular size and layer number) on the storage stability of RA were investigated by storage stability testing, dynamic shear rheometry (DSR) testing and fluorescence microscopy (FM) testing, in combination with molecular dynamics simulation (MD). The experimental results indicated that graphene improved the storage stability of RA significantly, with few-layer graphene being more effective in enhancing it. MD was used to investigate the graphene size effect on RA in compatibility, intermolecular binding energy and structural stability of the system. The simulation results revealed that small-sized graphene molecules were more compatible with RA. Meanwhile, few-layer, small-sized graphene can provide higher binding energy and better enhancement of storage stability of RA. The number of graphene layers mainly influences the binding energy rather than solubility parameters. The relative concentration distribution results demonstrated that graphene facilitated the spatial distribution of asphaltenes, rubber components and light components. This research provides theoretical support for the rational selection of microstructural properties of graphene to improve the modified asphalt storage stability performance.
废胶粉在沥青路面上的应用可以实现固体废物的无害化、资源化利用,但废胶粉改性沥青的贮存稳定性是制约其应用的主要问题之一。已有研究表明,石墨烯可以增强RA的储存稳定性,但石墨烯的尺寸效应对改性效果的影响及其机制尚不确定。本研究通过存储稳定性测试、动态剪切流变学(DSR)测试和荧光显微镜(FM)测试,结合分子动力学模拟(MD),研究了石墨烯微观结构特性(即分子大小和层数)对RA存储稳定性的影响。实验结果表明,石墨烯能显著提高RA的储存稳定性,且石墨烯层数少的效果更好。用MD研究了石墨烯尺寸对RA的相容性、分子间结合能和结构稳定性的影响。模拟结果表明,小尺寸的石墨烯分子与RA的相容性更好。同时,少层、小尺寸的石墨烯可以提供更高的结合能,更好地增强RA的储存稳定性。石墨烯层数主要影响结合能而非溶解度参数。相对浓度分布结果表明,石墨烯有利于沥青质、橡胶组分和轻质组分的空间分布。本研究为合理选择石墨烯的微观结构性质,提高改性沥青的储存稳定性性能提供了理论支持。
{"title":"Study on the storage stability performance enhancement mechanism of graphene on rubber-modified asphalt based on size effect","authors":"Yutong Xie, Yingli Gao, M. Liao, Weiwei Tian","doi":"10.3934/era.2023105","DOIUrl":"https://doi.org/10.3934/era.2023105","url":null,"abstract":"The application of waste rubber powder (WRP) for asphalt pavement could achieve the harmless and resourceful utilization of solid waste, but the storage stability of waste rubber powder modified asphalt (RA) is one of the main problems restricting its application. Existing studies have demonstrated that graphene could enhance the storage stability of RA, but graphene's size effect on the modifying effect and its corresponding mechanism are still uncertain. In this research, the effects of graphene microstructural properties (i.e., molecular size and layer number) on the storage stability of RA were investigated by storage stability testing, dynamic shear rheometry (DSR) testing and fluorescence microscopy (FM) testing, in combination with molecular dynamics simulation (MD). The experimental results indicated that graphene improved the storage stability of RA significantly, with few-layer graphene being more effective in enhancing it. MD was used to investigate the graphene size effect on RA in compatibility, intermolecular binding energy and structural stability of the system. The simulation results revealed that small-sized graphene molecules were more compatible with RA. Meanwhile, few-layer, small-sized graphene can provide higher binding energy and better enhancement of storage stability of RA. The number of graphene layers mainly influences the binding energy rather than solubility parameters. The relative concentration distribution results demonstrated that graphene facilitated the spatial distribution of asphaltenes, rubber components and light components. This research provides theoretical support for the rational selection of microstructural properties of graphene to improve the modified asphalt storage stability performance.","PeriodicalId":48554,"journal":{"name":"Electronic Research Archive","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70244632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The critical exponents for a semilinear fractional pseudo-parabolic equation with nonlinear memory in a bounded domain 一类具有非线性记忆的半线性分数型伪抛物型方程在有界区域内的临界指数
IF 0.8 4区 数学 Q1 MATHEMATICS Pub Date : 2023-01-01 DOI: 10.3934/era.2023129
Yaning Li, Yuting Yang
This paper considers blow-up and global existence for a semilinear space-time fractional pseudo-parabolic equation with nonlinear memory in a bounded domain. We determine the critical exponents of the Cauchy problem when $ alpha < gamma $ and $ alphage gamma, $ respectively. The results obtained in this study are noteworthy extension to the results of time-fractional differential equation. The critical exponent is consistent with the corresponding Cauchy problem for the time-fractional differential equation with nonlinear memory, which illustrates that the diffusion effect of the third order term is not strong enough to change the critical exponents.
研究一类具有非线性记忆的半线性时空分数型伪抛物型方程在有界区域上的爆破性和全局存在性。我们分别在$ alpha < gamma $和$ alphage gamma, $时确定了柯西问题的临界指数。所得结果对时间分数阶微分方程的结果有重要的推广意义。具有非线性记忆的时间分数阶微分方程的临界指数与相应的Cauchy问题一致,说明三阶项的扩散效应不足以改变临界指数。
{"title":"The critical exponents for a semilinear fractional pseudo-parabolic equation with nonlinear memory in a bounded domain","authors":"Yaning Li, Yuting Yang","doi":"10.3934/era.2023129","DOIUrl":"https://doi.org/10.3934/era.2023129","url":null,"abstract":"This paper considers blow-up and global existence for a semilinear space-time fractional pseudo-parabolic equation with nonlinear memory in a bounded domain. We determine the critical exponents of the Cauchy problem when $ alpha < gamma $ and $ alphage gamma, $ respectively. The results obtained in this study are noteworthy extension to the results of time-fractional differential equation. The critical exponent is consistent with the corresponding Cauchy problem for the time-fractional differential equation with nonlinear memory, which illustrates that the diffusion effect of the third order term is not strong enough to change the critical exponents.","PeriodicalId":48554,"journal":{"name":"Electronic Research Archive","volume":"6 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70244749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
On constrained minimizers for Kirchhoff type equations with Berestycki-Lions type mass subcritical conditions Berestycki-Lions型质量亚临界条件下Kirchhoff型方程的约束极小化
IF 0.8 4区 数学 Q1 MATHEMATICS Pub Date : 2023-01-01 DOI: 10.3934/era.2023131
Jing Hu, Jijiang Sun$ ^{} $
In this paper, for given mass $ m > 0 $, we focus on the existence and nonexistence of constrained minimizers of the energy functional begin{document}$ begin{equation*} I(u): = frac{a}{2}int_{mathbb{R}^3}left|nabla uright|^2dx+frac{b}{4}left(int_{mathbb{R}^3}left|nabla uright|^2dxright)^2-int_{mathbb{R}^3}F(u)dx end{equation*} $end{document} on $ S_m: = left{uin H^1(mathbb{R}^3):, |u|^2_2 = mright}, $where $ a, b > 0 $ and $ F $ satisfies the almost optimal mass subcritical growth assumptions. We also establish the relationship between the normalized ground state solutions and the ground state to the action functional $ I(u)-frac{lambda}{2}|u|_2^2 $. Our results extend, nontrivially, the ones in Shibata (Manuscripta Math. 143 (2014) 221–237) and Jeanjean and Lu (Calc. Var. 61 (2022) 214) to the Kirchhoff type equations, and generalize and sharply improve the ones in Ye (Math. Methods. Appl. Sci. 38 (2015) 2603–2679) and Chen et al. (Appl. Math. Optim. 84 (2021) 773–806).
In this paper, for given mass $ m > 0 $, we focus on the existence and nonexistence of constrained minimizers of the energy functional begin{document}$ begin{equation*} I(u): = frac{a}{2}int_{mathbb{R}^3}left|nabla uright|^2dx+frac{b}{4}left(int_{mathbb{R}^3}left|nabla uright|^2dxright)^2-int_{mathbb{R}^3}F(u)dx end{equation*} $end{document} on $ S_m: = left{uin H^1(mathbb{R}^3):, |u|^2_2 = mright}, $where $ a, b > 0 $ and $ F $ satisfies the almost optimal mass subcritical growth assumptions. We also establish the relationship between the normalized ground state solutions and the ground state to the action functional $ I(u)-frac{lambda}{2}|u|_2^2 $. Our results extend, nontrivially, the ones in Shibata (Manuscripta Math. 143 (2014) 221–237) and Jeanjean and Lu (Calc. Var. 61 (2022) 214) to the Kirchhoff type equations, and generalize and sharply improve the ones in Ye (Math. Methods. Appl. Sci. 38 (2015) 2603–2679) and Chen et al. (Appl. Math. Optim. 84 (2021) 773–806).
{"title":"On constrained minimizers for Kirchhoff type equations with Berestycki-Lions type mass subcritical conditions","authors":"Jing Hu, Jijiang Sun$ ^{} $","doi":"10.3934/era.2023131","DOIUrl":"https://doi.org/10.3934/era.2023131","url":null,"abstract":"In this paper, for given mass $ m > 0 $, we focus on the existence and nonexistence of constrained minimizers of the energy functional begin{document}$ begin{equation*} I(u): = frac{a}{2}int_{mathbb{R}^3}left|nabla uright|^2dx+frac{b}{4}left(int_{mathbb{R}^3}left|nabla uright|^2dxright)^2-int_{mathbb{R}^3}F(u)dx end{equation*} $end{document} on $ S_m: = left{uin H^1(mathbb{R}^3):, |u|^2_2 = mright}, $where $ a, b > 0 $ and $ F $ satisfies the almost optimal mass subcritical growth assumptions. We also establish the relationship between the normalized ground state solutions and the ground state to the action functional $ I(u)-frac{lambda}{2}|u|_2^2 $. Our results extend, nontrivially, the ones in Shibata (Manuscripta Math. 143 (2014) 221–237) and Jeanjean and Lu (Calc. Var. 61 (2022) 214) to the Kirchhoff type equations, and generalize and sharply improve the ones in Ye (Math. Methods. Appl. Sci. 38 (2015) 2603–2679) and Chen et al. (Appl. Math. Optim. 84 (2021) 773–806).","PeriodicalId":48554,"journal":{"name":"Electronic Research Archive","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70244821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Electronic Research Archive
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1