本文以波音737MAX机队中的ACMS报文为例,结合航空公司运行场景,介绍了飞机各阶段生成的报文结构、解析方法及其实现。随着飞行数据量的不断增加,传统的手动解析方法已难以满足航空公司对实时监控和故障检测的需求。为此,本文开发了一种...本文以波音737MAX机队中的ACMS报文为例,结合航空公司运行场景,介绍了飞机各阶段生成的报文结构、解析方法及其实现。随着飞行数据量的不断增加,传统的手动解析方法已难以满足航空公司对实时监控和故障检测的需求。为此,本文开发了一种基于Java Spring Boot和Vue 3的自动报文解析系统。该系统通过对指定文件路径的持续监控,实现了报文数据的自动监控和实时处理。这一系统能够有效提升报文解析的效率,减少人为操作带来的错误,确保数据的准确性和一致性。通过自动化解析系统,航空公司能够更快速地进行故障定位与维修决策,提升飞行安全性和运营效率。展开更多
山东大学软件学院沈益冉教授团队在移动计算和通信领域顶尖会议ACM International Conference on Mobile Computing and Networking(ACM MobiCom,CCF A类会议)发表了题为“WinSpy:Cross-window Side-channel Attacks on Android’s Mult...山东大学软件学院沈益冉教授团队在移动计算和通信领域顶尖会议ACM International Conference on Mobile Computing and Networking(ACM MobiCom,CCF A类会议)发表了题为“WinSpy:Cross-window Side-channel Attacks on Android’s Multi-window Mode”的研究论文。论文的第一作者和通信作者单位均为山东大学软件学院,第一作者为软件学院IGIP实验室硕士研究生李增,通信作者为沈益冉教授。本次工作中,澳大利亚昆士兰大学白光东教授团队和山东大学计算机学院胡鹏飞教授团队作出了重要贡献。展开更多
This paper presents a thermophysical study approach for a pure environmental control system(ECS),incorporating the geometric dimensions of heat exchangers,ram air duct,and air cycle machine(ACM)blades of the Sabreline...This paper presents a thermophysical study approach for a pure environmental control system(ECS),incorporating the geometric dimensions of heat exchangers,ram air duct,and air cycle machine(ACM)blades of the Sabreliner’s environmental control system.Real flight scenarios are simulated by considering flight input variables such as altitude,aircraft speed,compression ratio of the air cycle machine,and the mass flow rate of bleed air.The study evaluates the coefficient of performance(COP)of the environmental control system,the heat exchanger efficiencies,and the work distribution of the air cycle machine based on five flight scenarios,with a particular focus on considering the effects of humidity on environmental control system performance.The results demonstrate that at cruising altitude(11,000 m),air humidity conditions allow an increase in the COP of around 9.28%compared to dry conditions.Conversely,on land,humidity conditions reduce the performance by 4.26%compared to dry conditions.It was also found that the effects of humidity at high aircraft speeds become negligible.In general terms,the humidity conditions in the air proved to have positive effects on the environmental control system’s performance but negative effects on the heat exchanger efficiencies,reducing them by 0.22%.Additionally,land conditions reflect significant improvements in performance when the compression ratio of the air cycle machine is varied.Furthermore,in the work distribution of the air cycle machine,humidity conditions were demonstrated to consume 2.91%less work fromthe turbine compared to dry conditions.展开更多
Purpose:This study investigates factors associated with scientific recognition,examining how collaboration networks influence the path to ACM fellowship.Design/methodology/approach:We analyzed 1,497 ACM fellows(1994-2...Purpose:This study investigates factors associated with scientific recognition,examining how collaboration networks influence the path to ACM fellowship.Design/methodology/approach:We analyzed 1,497 ACM fellows(1994-2023)using linear regression on 286,791 publication records,examining co-authorship patterns and institutional overlaps while controlling for productivity metrics.Findings:Collaboration with ACM fellows among new electees increased from 43%to over 90%.Collaborating with ACM fellows is associated with achieving fellowship 3.8 years earlier,with frequent,recent collaborations and prestigious collaborators exhibiting even shorter time intervals to recognition.Gender and institutional factors also significantly impact timing.Research limitations:The study is correlational,focuses on one society,and may not capture all forms of scientific contribution beyond traditional metrics.Practical implications:Current processes may favor well-connected candidates.Reforms should increase transparency and expand recognition criteria to address biases and promote inclusivity.Originality/value:This provides the first comprehensive three-decade analysis of ACM fellowship patterns,revealing the growing importance of strategic networking in scientific recognition and offering evidencebased recommendations for more inclusive evaluation processes.展开更多
文摘本文以波音737MAX机队中的ACMS报文为例,结合航空公司运行场景,介绍了飞机各阶段生成的报文结构、解析方法及其实现。随着飞行数据量的不断增加,传统的手动解析方法已难以满足航空公司对实时监控和故障检测的需求。为此,本文开发了一种基于Java Spring Boot和Vue 3的自动报文解析系统。该系统通过对指定文件路径的持续监控,实现了报文数据的自动监控和实时处理。这一系统能够有效提升报文解析的效率,减少人为操作带来的错误,确保数据的准确性和一致性。通过自动化解析系统,航空公司能够更快速地进行故障定位与维修决策,提升飞行安全性和运营效率。
文摘山东大学软件学院沈益冉教授团队在移动计算和通信领域顶尖会议ACM International Conference on Mobile Computing and Networking(ACM MobiCom,CCF A类会议)发表了题为“WinSpy:Cross-window Side-channel Attacks on Android’s Multi-window Mode”的研究论文。论文的第一作者和通信作者单位均为山东大学软件学院,第一作者为软件学院IGIP实验室硕士研究生李增,通信作者为沈益冉教授。本次工作中,澳大利亚昆士兰大学白光东教授团队和山东大学计算机学院胡鹏飞教授团队作出了重要贡献。
文摘This paper presents a thermophysical study approach for a pure environmental control system(ECS),incorporating the geometric dimensions of heat exchangers,ram air duct,and air cycle machine(ACM)blades of the Sabreliner’s environmental control system.Real flight scenarios are simulated by considering flight input variables such as altitude,aircraft speed,compression ratio of the air cycle machine,and the mass flow rate of bleed air.The study evaluates the coefficient of performance(COP)of the environmental control system,the heat exchanger efficiencies,and the work distribution of the air cycle machine based on five flight scenarios,with a particular focus on considering the effects of humidity on environmental control system performance.The results demonstrate that at cruising altitude(11,000 m),air humidity conditions allow an increase in the COP of around 9.28%compared to dry conditions.Conversely,on land,humidity conditions reduce the performance by 4.26%compared to dry conditions.It was also found that the effects of humidity at high aircraft speeds become negligible.In general terms,the humidity conditions in the air proved to have positive effects on the environmental control system’s performance but negative effects on the heat exchanger efficiencies,reducing them by 0.22%.Additionally,land conditions reflect significant improvements in performance when the compression ratio of the air cycle machine is varied.Furthermore,in the work distribution of the air cycle machine,humidity conditions were demonstrated to consume 2.91%less work fromthe turbine compared to dry conditions.
基金supported by the National Social Science Foundation of China(grant No.CIA200270)National Natural Science Foundation of China(grant No.62006109 and 12031005).
文摘Purpose:This study investigates factors associated with scientific recognition,examining how collaboration networks influence the path to ACM fellowship.Design/methodology/approach:We analyzed 1,497 ACM fellows(1994-2023)using linear regression on 286,791 publication records,examining co-authorship patterns and institutional overlaps while controlling for productivity metrics.Findings:Collaboration with ACM fellows among new electees increased from 43%to over 90%.Collaborating with ACM fellows is associated with achieving fellowship 3.8 years earlier,with frequent,recent collaborations and prestigious collaborators exhibiting even shorter time intervals to recognition.Gender and institutional factors also significantly impact timing.Research limitations:The study is correlational,focuses on one society,and may not capture all forms of scientific contribution beyond traditional metrics.Practical implications:Current processes may favor well-connected candidates.Reforms should increase transparency and expand recognition criteria to address biases and promote inclusivity.Originality/value:This provides the first comprehensive three-decade analysis of ACM fellowship patterns,revealing the growing importance of strategic networking in scientific recognition and offering evidencebased recommendations for more inclusive evaluation processes.
