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Research on lumbar spine injury of aircraft occupants under vertical impact based on THUMS SHI Xiaopenga , LI Peiyaob , GUO Kai c , CUI Shurui c , XIE Jianga Journal of Civil Aviation University of China    2025, 43 (4): 1-9.   Abstract （2387）            Knowledge map    Save Under aircraft crash impacts, lumbar spine injury is a key factor affecting the survival ability of aircraft occupants (abbreviated as occupants). This article aims to investigate the lumbar spine injuries of occupants under vertical impact loads. Firstly, the high-precision numerical dummy THUMS (total human model for safety) was used to study the effects of loading peak and loading time of the impact load acceleration on the biomechanical injuries to the lumbar spine of occupants. Secondly, the differences in lumbar spine dynamic response between THUMS and Hybrid Ⅲ dummies under vertical impact conditions were analyzed. Finally, the biomechanical injury of the occupants′ lumbar spine was studied from a microscopic perspective. The study showed that with change of constant velocity, the peak value of axial load of the occupants′ lumbar spine increases greatly with an increase in loading peak of acceleration, while the peak value of bending moment of the lumbar spine increases little. The peak value of axial load of the occupants′ lumbar spine is positively correlated with the speed of energy accumulation. When the loading time is excessively short, the inertia effect limits lumbar flexion, resulting in a smaller bending moment of the lumbar spine. The largest axial load of lumbar spine appears at the L5 cross-section and the largest bending moment of lumbar spine occurs at the L1 cross-section, the assessment of lumbar spine injury of occupants should comprehensively consider the effects of axial compression force and bending moment. From a biomechanical perspective, the risk of injury to the cortical bone and key ligaments of the lumbar spine is the highest. Reference | Related Articles | Metrics | Comments（0）

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Progress on civil aircraft vibration comfort design SHU Juncheng, , HE Erming, , YIN Menghan, , ZHAO Guanchen, Journal of Civil Aviation University of China    2025, 43 (2): 1-7.   Abstract （2342）            Knowledge map    Save In the competition of the civil aviation market, passenger comfort is paramount. In order to improve the vibration comfort of civil aircraft and enhance the market competitiveness of Chinese civil aircraft, this article proposed methods and ideas for solving civil aircraft vibration problems from the perspective of civil aircraft design process. Firstly, based on the commercial operation of China′s domestically developed regional aircraft ARJ21 and large aircraft C919 with independent intellectual property rights, the main vibration problems of China′s self-developed civil aircraft were introduced in detail. Secondly, the multi-source vibration characteristics of civil aircraft and their transmission paths on the body were analyzed, and the methods of multi-source vibration contribution analysis and cabin vibration comfort evaluation were introduced. Subsequently, in order to prioritize vibration comfort requirements in the design phase of civil aircraft, a two-stage vibration reduction index allocation process based on multi-source vibration contribution analysis was proposed, and the basic idea of civil aircraft vibration comfort design was constructed. Finally, the research direction of vibration comfort design for civil aircraft was prospected, and the technical measures and ideas to improve passenger comfort were explored, in order to provide useful inspiration for the vibration comfort design of Chinese civil aircraft. Reference | Related Articles | Metrics | Comments（0）

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Sensitivity analysis of engine safety affecting factors based on the turbocharging system model LI Guoa, , WANG Zilub , TENG Yidab , XU Tonggeb Journal of Civil Aviation University of China    2025, 43 (1): 1-10.   Abstract （2289）            Knowledge map    Save Adopting turbocharging system can effectively restore the high-altitude power performance of the engine and improve the working ceiling of general aircraft. However, while improving the engine performance, its safety should also be given sufficient attention. In order to improve the safety of the turbocharging system of aviation reciprocating engine and provide suggestions for actual operation, this paper combines model-based system safety analysis, "V" shaped safety analysis, response surface methodology (RSM), and Sobol factor sensitivity analysis method, and taking Rotax914 as prototype, a quasi dimensional model for the entire engine and fitting equation are constructed for global sensitivity analysis. The sensitivity of the turbocharging system performance of aviation reciprocating engine to different safety affecting factors are analyzed and compared. The results indicate that the sensitivity index of altitude is much higher than other factors, and the sensitivity index of intake valve diameter is higher than that of exhaust valve diameter but they are similar in magnitude. The effective length of air filter has almost no effect on the engine turbocharging system under normal operating condition. Therefore, during the actual operation, the change range of safety affecting factors can be adjusted according to the analysis results, in order to reducing the uncertainty of key factors and conducting efficient and intuitive safety analysis. Reference | Related Articles | Metrics | Comments（0）

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Experimental and simulation on emergency evacuation of passenger in wide-body aircraft under tilted attitude CHENG Ming, WEI Keyu Journal of Civil Aviation University of China    2025, 43 (3): 1-7.   Abstract （2248）            Knowledge map    Save To explore the influence of tilted attitude of wide-body aircraft on the emergency evacuation of cabin passenger, a combination of cabin partial evacuation test and full-size simulation test is used to analyze the key factors such as evacuation time. Based on the scenario construction theory and social force model, the relevant parameters in the full-size simulation model are modified with real test data of partial evacuation, and then the full-size simulation model is used to conduct the simulation test of passenger evacuation under cabin tilted attitude, and the increase model of the average evacuation time of tilted attitude is established. The test data show that the inclination attitude angle of the aircraft has an effect on the evacuation process and efficiency. Under pitch attitude, pitch ±5 degrees has a positive effect on the evacuation efficiency, evacuation efficiency is -0.044 at pitch -10 degrees. Under roll posture, roll angle has a significant negative correlation with evacuation efficiency, and the evacuation efficiency is -0.073 at roll ±10°. The results show that the data deviation between simulation model and real test of partial evacuation is 6.54%, which is in the acceptable range. The full-size simulation model can accurately simulate the effects and change rules of passenger emergency evacuation under the tilted attitude of the cabin, and can provide references for the safety evaluation of the design, manufacture and operation of passenger aircraft. Reference | Related Articles | Metrics | Comments（0）

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LightGBM-based phased multimodal trajectory prediction method Journal of Civil Aviation University of China    2026, 44 (1): 1-9.   Abstract （2142）      PDF（pc） （1224KB）（105）       Knowledge map    Save as insufficient data diversity, dificulty in acquiringcritical data, high model complexity and poor generalization, this paper proposes a light gradient boosting ma-chine (LightGBM)-based phased multimodapn method (LightGBM-based PMTPM). Themethod can intelligently identify the flight phabased on data from the aircraft's own sensors,predict the 4D trajectory and real-time qualig an onboard computer. Experimental resultsshow that, during all flight phases, the LightGoutperforms the back propagation neural net-work-based phased multimodal trajectory predN-based PMTPM) in predictive performance,with root mean square error (RMSE) reductions of 64.86%, 13.15%, 80.88%, 77.46%, 86.45%, 3.46% and19.22%, respectively. The average evaluation time of the LighiGBM-based PMTPM is 59.890 ms, meeting theaccuracy and real-time requirements for 4D trajectory prediction of aircraft. Related Articles | Metrics | Comments（0）

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Design of aircraft cabin passenger layout scheme based on infectious disease model GU Runping, ZHANG Yangzong, LIU Jiaming Journal of Civil Aviation University of China    2025, 43 (3): 32-37.   Abstract （2114）            Knowledge map    Save During the spread of the epidemic, regarding the risk of passengers of mutual infection in the aircraft cabin, it is very necessary to optimize the layout scheme of passengers in the cabin and reduce the virus infection probability of passenger. By studying the law of virus transmission in the aircraft cabin, this paper analyzed the influencing factors of the probability of individuals being infected by the virus and the virus shedding rate in the cabin. The match between passenger and seat was used as the decision variable, and the minimum sum of the cabin passengers affected by the virus shedding rate of other passengers around was used as the objective function. Based on the characteristics of passenger group flight, a allocation model for the passenger group cabin seat was established. This paper designed an improved genetic algorithm, solved the model, and realized the algorithm using Matlab. Taking A320 aircraft as an example, three passenger cases with different group layouts were tested. The results showed that the proposed model and algorithm can provide an optimized seat allocation scheme within an acceptable time and reduce the probability of infection among passengers. Reference | Related Articles | Metrics | Comments（0）

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Safety assessment and decision analysis of UAV considering uncertainty TIAN Yi, RAO Haochang, XIAO Nyu′e Journal of Civil Aviation University of China    2025, 43 (1): 83-88.   Abstract （2089）            Knowledge map    Save Quantitative safety assessment is an important means to verify whether unmanned aerial vehicle(UAV) meets the safety requirements. Aiming at the parameter uncertainty of UAV component failure distribution, firstly, the failure distribution parameters of basic events are modified by Bayesian theory to obtain the failure probability of top events. Then, the safety decision analysis of top events is completed with the help of Bayesian decision theory. Finally, the safety evaluation of UAV is improved into a complete assessment and decision analysis process. The research shows that the calculation process of top event failure probability and Bayesian decision can be realized by taking the error information generated by data link communication during the operation of a UAV as an example. Reference | Related Articles | Metrics | Comments（0）

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Research progress on the application of CF3I in substituting airborne Halon fire-extinguishing agent CUI Wenyao Journal of Civil Aviation University of China    2025, 43 (4): 10-14.   Abstract （2047）            Knowledge map    Save The airborne Halon fire-extinguishing agent in aircraft has been restricted in production and phased out within a specified period by international conventions due to its ozone depleting effects. Trifluoroiodomethane (CF3I) is considered as one of the most promising Halon alternatives due to its comparable efficiency of fire-extinguishing to Halon, low ozone depletion potential (ODP) and global warming potential (GWP). However, concerns regarding its cardiac sensitization have limited its usage to uninhabited areas. In this work, the feasibility study of CF3I replacing airborne Halon fire-extinguishing agent is firstly sorted out. Then, the current research progress on the design of CF3I fire-extinguishing system is summarized. Finally, the research direction of airborne CF3I fire-extinguishing device is prospected. This study has important practical significance for the research and development of domestic large aircraft Halon replacement technology and fire-extinguishing equipment. Reference | Related Articles | Metrics | Comments（0）

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Research on the resilience evaluation of airport running and sliding system under snowfall conditions CHENG Guoyong, TIAN Yimeng Journal of Civil Aviation University of China    2025, 43 (4): 50-55.   Abstract （2028）            Knowledge map    Save In response to the prominent problems faced by most large civil aviation airports in China, such as capacity saturation and high operational pressure, as well as the weak resilience research in China′s civil aviation infrastructure field under unfavorable meteorological conditions, a 4E airport in North China is taken as the research object, firstly, the running and sliding system simulation model of this airport is established by Anylogic simulation tool, and the performance response function F（t） of the running and sliding system is constructed based on three parameters: the total number of take-off and landing sorties completed up to t hour N(t), the total number of take-off and landing sorties within t hour nt and the average taxiing time T(t). Secondly, on this basis, according to the basic concept of performance response function method, the resilience index R of running and sliding system is proposed. Then, further referring to the arithmetic mean and one standard deviation results of airport resilience index from previous research, a 5-level classification standard for the resilience level of the running and sliding system is proposed, including low, relatively low, medium, relatively high, and high resilience. Finally, according to the above research, it is concluded that the resilience level of running and sliding system fluctuates due to the influence of flight arrangement density, and the airport performs well under short -term and small snowfall conditions, where the resilience index is above 0.680 0. However, the resilience level of the system needs to be improved under long-term and heavy snowfall conditions, and the resilience index is only 0.472 1 under the most unfavorable conditions. This study can provide references for the research and application of the resilience theory of civil aviation infrastructure. Reference | Related Articles | Metrics | Comments（0）

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Study on degradation and thermal runaway characteristics of commercial lithium-ion battery fast-charging ZHOU Xiaomeng a, b , CAI Jinlea, b , GUO Yiboa , LIAO Yunlong b Journal of Civil Aviation University of China    2025, 43 (1): 27-32.   Abstract （1975）            Knowledge map    Save To identify the impact of fast-charging aging factors on the operation and thermal safety performance of lithium-ion batteries, this study first conducts cyclic aging tests on commercial 18650 lithium-ion batteries using 1C/2C charging rate to characterize capacity decay, electrochemical impedance, operating temperature rise, and other characteristics of the battery. Secondly, on the self built thermal runaway platform, compare the differences in thermal runaway behavior and temperature characteristics between fresh and fast-charging aged lithium-ion batteries are compared. The results show that the aging process of lithium-ion battery is nonlinear, and presents three stages corresponding to different aging mechanisms. Increasing the fast-charging rate leads to a significant magnify in charge transfer impedance and ohmic impedance. The cycle life of lithium-ion batteries with 2C charging rate aging shortens rapidly, and abnormal heat release behavior occurs during the cycle, and the maximum surface temperature reaches 75 ℃ during the charging phase, which not only accelerates the capacity decay of the battery, but also increases the risk of thermal runaway. The results of the thermal runaway test show that the thermal runaway of aged lithium-ion batteries is delayed and the temperature of thermal runaway is higher. Lithium-ion batteries affected by fast-charging aging factors have better thermal stability, but the process of thermal runaway is more dangerous. Reference | Related Articles | Metrics | Comments（0）

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Two-level matching algorithm for image features based on CA-SIFT JIAO Weidong, JIAO Yizhe Journal of Civil Aviation University of China    2025, 43 (2): 73-82.   Abstract （1970）            Knowledge map    Save To address the problems of loss of image spectral information, low matching accuracy and large computational effort in the process of color image matching by the scale invariant feature transform (SIFT) algorithm in Euclidean space, an image matching algorithm based on CA-SIFT is proposed using the expressiveness of Clifford algebra (CA) for multidimensional space. Firstly, the image is transformed to CA space representation, while retaining the image space and spectral information, and the metric function is constructed by the inner product operation of the conformal geometric algebra to improve the efficiency of feature point search and detect feature points in CA space. Secondly, a two-stage image feature matching strategy is adopted, the CA-SIFT feature description vector is converted into a hash code, and the coarse matching results are obtained by brute force matching. Finally, a gridbased motion statistics (GMS) method is used to complete the fine matching. The experimental results show that the proposed algorithm outperforms the SIFT algorithm, and the number of extracted feature point pairs is improved nearly 54%. In terms of image matching, the average matching accuracy reaches over 98%, achieving a highly accurate and applicable image matching method for most scenes. Reference | Related Articles | Metrics | Comments（0）

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Study on the influence of different loading conditions on lumbar response index RUI Xiangqian , CUI Shurui a , SHI Xiaopengb Journal of Civil Aviation University of China    2025, 43 (1): 20-26.   Abstract （1969）            Knowledge map    Save Lumbar load and dynamic response index (DRI) are two common lumbar response index used to assess passenger lumbar injuries during emergency landing of aircraft. To elucidate the differences between these two metrics, firstly, the seat-occupant finite element model and the occupant upper limb lumped parameter model were established in this paper. Secondly, a comparative verification is conducted between the seat-occupant finite element model and the occupant upper limb lumped parameter model. Finally, a parametric analysis was conducted on these two lumbar response index by changing the loading time and loading peak value. The results show that the DRI value calculated by floor acceleration is lower than that calculated by pelvic acceleration, and when the loading time is constant, the DRI value shows an increasing trend with the increase of loading peak value. When the loading peak value is constant, the DRI value shows the trend of increasing first and then decreasing with the increase of loading time. When the speed change is constant, the DRI value shows an increasing trend with the increase of the loading peak value. In summary, by sorting out and analyzing the principle of DRI, it is helpful to promote the continuous improvement of the criteria for determining occupant lumbar injuries. Reference | Related Articles | Metrics | Comments（0）

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Airspace capacity evaluation of wide range air route network based on improved Euler model GAO Wei, MU Rong Journal of Civil Aviation University of China    2025, 43 (3): 24-31.   Abstract （1968）            Knowledge map    Save Aiming at the high complexity of airspace capacity evaluation of wide range air route network, a method for fast evaluating airspace capacity of wide range air route network was proposed. Firstly, the airports, terminal areas and sectors in the airspace were taken as nodes, and the network edge was determined according to whether there was traffic flow between nodes. The airspace topology network of air route network based on airport, terminal areas and sector nodes was obtained to reduce the airspace dimension of the air route network. Secondly, the airports, terminal areas and sector nodes were used as the control unit of the Euler model to improve the Euler model, and the improved Euler model was used to model the traffic flow in the airspace topology network of the air route network. Then, a target optimization model was established based on node capacity, and used elite retention genetic algorithm to solve the traffic flow in the airspace topology network of the air route network. When the traffic flow in the airspace topology network of the air route network stabilizes, the airspace capacity of the air route network was obtained. Finally, the airspace capacity of a certain air route network was calculated in China and conducted simulation verification using total airspace and airport modeller (TAAM), proving the feasibility and accuracy of this method. Reference | Related Articles | Metrics | Comments（0）

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Network resilience assessment of airport running and sliding system based on cell transmission model ZHANG Yuhui, WEN Wen Journal of Civil Aviation University of China    2025, 43 (3): 53-61.   Abstract （1965）            Knowledge map    Save Runway capacity is one of the key elements that affect the normal operation of airport flight areas, and external disturbance events can cause a decrease in the dynamic capacity of the airport. According to airport aircraft taxiing rules, this article proposes a model to evaluate the resilience of airport flight area operation network after disturbance events, based on cell transmission model (CTM). Firstly, network performance parameters are obtained based on the CTM. Then, taking the number of aircraft waiting in the network and the efficiency of network operation as basic performance indicators, a resilience index for the dynamic changes of the resilience of the disturbed network is established. Finally, the CTM based network resilience assessment framework for airport running and sliding system is established, and operational data from Tianjin Binhai International Airport in 2019 are collected, processed, and analyzed. The research results indicate that the trend of simulated airport departure operation data is highly consistent with the actual departure operation data, with a simulation accuracy of over 90%, and can accurately describe the network traffic flow distribution of the airport running and sliding system. The two proposed resilience assessment indicators for airports can comprehensively reflect the complete dynamic change process of system network performance from degradation to recovery before and after disturbance events occur, providing new support for network management of airport running and sliding system. Reference | Related Articles | Metrics | Comments（0）

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Fuzzy comprehensive evaluation of terminal area operational efficiencybased on interval numbers XIE Chunsheng , GAO W anqi, , LU Fei Journal of Civil Aviation University of China    2026, 44 (1): 10-16.   Abstract （1954）      PDF（pc） （1111KB）（70）       Knowledge map    Save determined from the perspective of interval numberlistances, and weights are calculated using the ordered weighted averaging (OWA) operator combined with nor-nal distribution. Finally, the operational efficiency of terminal areas at domestic airports is evaluated based onthe established evaluation system. Taking four typical airports in the Beijing-Tianjin-Hebei region, namely Bei-jing Capital Intemational Airport, Beijing Daxing Intemational Airport, Tianjin Binhai International Airport, aneShijiazhuang Zhengding Intemational Airport, as examples, the terminal area operational efficiency is evaluated,resulting in ratings of good, good, poor, and poor, respectively. The research results show that the evaluation out-comes align well with the actual operating conditions of the terninal areas, verifying the feasibility of the methodproposed in this paper. Related Articles | Metrics | Comments（0）

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Experimental study of the effect of high temperature environment in the cabin on civil aviation flight crews SHEN Haiminga , REN Jiawei b , SHEN Hao , WANG Yanqingb Journal of Civil Aviation University of China    2025, 43 (4): 22-28.   Abstract （1946）            Knowledge map    Save The Mechanical Systems Harmonization Working Group (MSHWG) was tasked by the Federal Aviation Administration (FAA) to propose a new set of standards for acceptable high-temperature environments in the cabin based on the core temperature of the human body. To investigate the impact of this standard on the physiological indicators and behavioral abilities of Chinese flight crews, this study simulated the high -temperature environment of the cockpit in an artificial climate chamber and conducted a control experiment using healthy male flight trainees aged 18-25 and ordinary college students. Wireless physiological equipment was used to monitor changes in human physiological indicators at different core temperatures of the human body and time, and a neurobehavioral evaluation system was used to assess changes in human behavioral ability indicators. The experimental results showed that human body core temperature, skin temperature and heart rate increased with rising environment temperature, and they are all within the physiological tolerance range of the human body. The arterial and venous oxygen saturation decreased with increasing environment temperature, but with no statistical difference. There were no significant changes in any behavioral abilities of the human body under different core temperature-times conditions, except for visual retention ability and the differences were not statistically significant. The core temperature limit values of the human body provided by MSHWG have a safe impact on the physiological load and behavioral abilities of flight crews. Reference | Related Articles | Metrics | Comments（0）

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Analysis of factors affecting terminal safety resilience based on DEMATEL-ISM model SONG Yang a , WANG Ruiqi b , ZHANG Peng b Journal of Civil Aviation University of China    2025, 43 (2): 52-57.   Abstract （1944）            Knowledge map    Save To promote the construction of terminal safety resilience and improve the level of terminal safety management, the concept of "safety resilience" is introduced into terminal safety management, and the factors affecting the safety resilience of the terminal are analyzed using the integrated method of decision-making trial and evaluation laboratory (DEMATEL) and interpretative structural model (ISM). Firstly, the definition of terminal safety resilience is proposed, and the indicator system of terminal safety resilience influencing factors is constructed centered on the monitoring ability, resistance ability, emergency response ability and recovery ability demonstrated with its operation. Then, the DEMATEL-ISM model is established, and the DEMATEL method is used to calculate the degree of influence, the degree of being influenced, the degree of center, the degree of cause, and the causal attributes between the factors, and the ISM method is used to divide their hierarchical structure. Finally, Terminal A of a domestic airport is taken as an example for model validation. The results indicate that the fundamental influencing factor of terminal safety resilience is the establishment of a terminal safety resilience mechanism, which is consistent with the actual operation of Terminal A. This validates the effectiveness and reliability of the model and provides decision making and theoretical support for terminal safety management. Reference | Related Articles | Metrics | Comments（0）

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Research on the evolution of international freight rates and taxes in civil aviation GAO Chao, , YU Zhao, , ZHANG Honghai , , TIAN Feng, Journal of Civil Aviation University of China    2025, 43 (4): 62-66.   Abstract （1914）            Knowledge map    Save Civil aviation international freight rates and taxes are an important source of increasing national fiscal revenue, but due to differences in tax policies among different countries and regions, as well as differences in tax rules among different airlines, civil aviation international freight rates and taxes need to be calculated through multiple channels and data sources, which greatly reduces user experience. To provide effective theoretical and practical guidance for industry-related personnel, this article is based on the changes in international freight rates and taxes calculation rules and methods. Firstly, the evolution process of civil aviation international freight rates and taxes from manual calculation to automation and intelligence is systematically reviewed, with a focus on the series of work carried out by Airline Tariff Publishing Company (ATPCO) in establishing unified technical specifications and management standards for civil aviation international freight rates and taxes. Secondly, a work case of TravelSky Technology Limited (abbreviated as China TravelSky) implementing automatic calculation of taxes and fees in civil aviation international fare search was introduced. Finally, a comprehensive analysis was conducted on the impact of new taxes, new technologies, and new policies on the international freight rates and taxes of civil aviation. Reference | Related Articles | Metrics | Comments（0）

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Research on the performance monitoring and replacement standard for damaged hydraulic hose of civil aircraft JIA Baohui a , MA Yuwei b , WANG Yuxina , YAO Fei b , XIAO Haijianc Journal of Civil Aviation University of China    2025, 43 (1): 67-74.   Abstract （1897）            Knowledge map    Save Using the approach of theoretical model establishment, experimental verification and simulation analysis, the mechanical performance change rule and failure situation of the hydraulic hose of civil aircraft when containing wear defects are analyzed in this paper. The damage status of the hose that needs to be key monitored and the wear defect depth recommend for replacement are obtained. Based on the flow-solid coupling method, a finite element simulation analysis of composite pipeline was conducted in ANSYS WORKBENCH to explore the influence of wear defect depth and axial length on mechanical performance under different fluid pressures, the prediction function relationship of the maximum total deformation and maximum equivalent strain of pipelines under different pressures are given, and a composite strength model of damaged pipelines is established. According to the established model, the pipeline does not fail before the inner wall is completely damaged, and when the wear depth and wall thickness ratio is 0.4, its mechanical performance decrease significantly, when it needs to be key monitored or replaced. Reference | Related Articles | Metrics | Comments（0）

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Review of key technologies and methods for secure sharing of civil aviation data DENG Wua , LI Xinyanb , ZHOU Xiangbing , ZHAO Huimina Journal of Civil Aviation University of China    2025, 43 (2): 8-18.   Abstract （1893）            Knowledge map    Save This paper provides an in-depth analysis of the current research status and technological advancements in civil aviation data sharing. Firstly, this article outlines the basic framework and core elements of civil aviation data sharing, followed by a detailed discussion of several cutting-edge technologies and their applications. Among them, the system wide information management (SWIM) serves as the core platform supporting civil aviation data sharing, achieving comprehensive integration and efficient utilization of aviation data by building a unified information exchange network. The collaborative decision making (CDM) system further strengthens real-time communication and collaboration across departments and institutions, particularly demonstrating significant results in areas of flight operation management, optimal resource allocation and emergency response, which has effectively improved the overall operational efficiency and safety of the civil aviation system. In terms of data security and privacy protection in data sharing, new technologies such as blockchain and federated learning have also shown great poten鄄 tial. Blockchain provides secure and transparent data sharing solutions, while federated learning achieves knowledge sharing under the premise of protecting privacy. However, data sharing faces challenges such as insufficient standardization, difficulty in cooperation and coordination, data security, technical complexity, and cost feasibility. In summary, this article not only reveals the latest technological advancements of key technologies for secure sharing of civil aviation data, but also provides a forward-looking perspective on future trends and opportunities, providing reference and guidance for the continuous innovation of civil aviation data sharing and the digital transformation of the global civil aviation industry. Reference | Related Articles | Metrics | Comments（0）