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Table of Content

    26 August 2014, Volume 32 Issue 4
    Civil Aviation
    Hub location and Tube airline network design based on FCM algorithm
    WANG Li-li,LIU Bing,ZHAO Ru-bin
    2014, 32(4):  1-4. 
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    Tube route is an important way to relieve airspace tension. Fuzzy C-means clustering method is applied aiming at aviation hub location problem,clustering the data of airport taking off and landing,degree centrality and GDP of cities,the various grades of hub are achieved. Then the adjacent cities are combined according to geographical position,the initial network is completed after the city agglomerations are selected,which is simplified using the shortest path algorithm to get the final result of centre route network,the results feedback is analyzed to provide theoretical basis for China's airspace reform.

    Model of radar control team cooperation
    LIU Yong-xin,WANG Han-bo
    2014, 32(4):  5-8. 
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    The cooperation and coordination of air traffic controller teams are a vital part for ensuring the safe operation of air traffic control. Using mutual belief model(MBM),the cooperation model of radar control is developed. The validity of the model is verified by radar control simulator. The MBM in the cooperation of radar controller teams and the relationships between the strategy of maintaining situation awareness and communication approaches are analyzed,which will promote the further research of team cooperation model in abnormal situations. Besides, the outcomes also provide evidence of the assessment of air traffic control system and the performance of controller teams.

    En route sector reconstructing assignment model and algorithm
    YE Zhi-jian,MENG Ling-hang,GENG Zeng-xian
    2014, 32(4):  9-14,26. 
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    In order to effectively adapt to traffic demand changes in time and space,based on quantization of the aircraft number in the function block and multi-ATC team,an adaptive sector reconfiguration assignment model and an algorithm are proposed. When the target airspace has been processed as grid,statistics of the evenly distributed aircraft number are obtained in each grid. Aircraft distribution coefficients are used to correct the extra workload while air traffic controllers conduct coordination,transferring and resolving conflicts. Then the amended aircraft distribution numbers are alluded to each grid. A backpack assignment model and calculation method is designed for grid grouping on condition of multi-period,variable job number and variable capacity. Numerical examples show that the model is feasible as while as algorithm is effective. On high demand day,assignment algorithm results reduce about 15% of human resource needs than current needs under three crew shifts. On low traffic demand day,the assignment algorithm results still can reduce about 8%of human resources needs.

    Civil aircraft dispatch reliability assessment based on fuzzy comprehensive evaluation
    CAO Yu-yuan,LI Yan-jun,WANG Xiao-ming,ZHENG Qing
    2014, 32(4):  15-18. 
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    For civil aircraft dispatch reliability design and assessment methods,the dispatch reliability model's construction is based on multi-level fuzzy comprehensive evaluation method. Initially through experts'research we determine the factors affecting civil aircraft dispatch reliability of the secondary index system and classify them according to their importance. Then using the AHP method we calculate the weight of the influencing factors,and their membership function by using generalized trapezoidal fuzzy number,and through the fuzzy interpolative method we can identify the fuzzy relationship matrix,then a mathematical
    model can be established to achieve the fuzzy comprehensive evaluation of civil aircraft dispatch reliability.Finally when compared with airlines爷B737 fleet dispatch reliability level verification results,we can conclude that the evaluation model and its evaluation results are basically consistent with the actual situation.

    Coding of aircraft zoning and access ports based on S1000D
    XU Jian-xin,ZHANG Alibumi,QING Guang-hui
    2014, 32(4):  19-22. 
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    S1000D is the specification for fabricating IETM by utilizing technology of correlated modularized data organization to achieve the re-use and sharing of data. Based on S1000D and MSG-3,the identification and coding of aircraft zoning and access ports based on S1000D are proposed,which can be used to integrate and manage the synthesized technological information of aircraft maintenance and provide consistent common data source for aviation digital design,manufacture and maintenance.

    Research on fault diagnosis method of civil aircraft based on collaborative filtering theory
    XUE Peng
    2014, 32(4):  23-26. 
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    Collaborative filtering theory is used in fault diagnosis field of civil aircrafts. Similarities between faults in the theory are calculated by Pearson method and vector cosine method. By analyzing the defects of collaborative filtering method,the concept of meta-similarity and weight are applied to solve these problems. Finally,practical instances in different conditions prove the learning ability and high accuracy of collaborative filtering theory and the optimized method,which can be applied in civil aircraft fault diagnosis,helping improve maintenance efficiency and reduce operating costs.

    Analysis of evolutionary game theory between airlines and pilots based on TEM training
    YANG Hu,PAN Le-shu,YOU Yang
    2014, 32(4):  27-30,42. 
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    For the inevitability of threat and error,evolutionary game model of threat and error management between airlines and pilots has been established by the method of evolutionary game theory. The evolution path is simulated by Matlab,and then the dynamic effect of different variables to threat and error management can be analyzed. Result of the research shows that if more training were provided to pilots,it could effectively weaken the threat and reduce mistakes. In the long-term supervision of threat and error,the airlines should adjust its internal mechanism,the training of threat and error's identification should be established,airlines should increase the intensity of punishments for the pilots'abstain from an act and increase training costs rationally.Besides,airlines should fully perform their function of administration;and greater efforts in pilots'study organization should be given in order to strengthen the pilots'identification and responsing capacity of threat and error. At the same time,the simulation result also confirms its feasibility and applicability,providing research ideas for threat and error management which is an emerging field.

    Engineering and Technology
    Design and implementation of deployment data management system in integration environment
    GUO Xue-ying,SHE Guo-cheng,JIANG Ying
    2014, 32(4):  31-35. 
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    The operation of information system requires deployment data as support in integration environment;system fills deployment information automatically by importing installation and configuration files,in which way the deployment efficiency can be improved. Deployment data management system is proposed to achieve data synchronization and perform installation configuration file output function. System development framework and related technologies are introduced. System functions are planed through needs analysis. Main modules are designed and implemented in details. Test results show that the current system can be applied in integrated environments as a general tool.

    Effect of isolated oxide on interface residual stress in thermal barrier coatings
    HAN Zhi-yong,JING Zhen-zhu
    2014, 32(4):  36-38. 
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    The interface residual stresses in thermal barrier coatings during thermal cycling for different isolated oxides are modeled by using finite element analysis software ABAQUS. Sine and plane patterns are selected as typical interfaces feature of TBCs. It shows that the effect of oxide in the peak on the interface residual stresses is more significant compared with the oxide in the trough. With shorter distance between isolated oxide and TGO/BC interface,the influence of the isolated oxide on the interface residual stresses gets more serious. Besides,the shorer of the isolated oxide radius,the less effect of which on the interface residual stresses.

    Effect of different design methods to thickness of asphalt concrete airport pavement
    YOU Qing-long,MA Jing-lian,YUAN Jie
    2014, 32(4):  39-42. 
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    Based on a large survey of currently representative design methods of asphalt concrete airport pavement in the world,structure thickness of Kunming New Airport is analyzed using the design methods of 6E,6D from FAA,China's civil aviation asphalt pavement design method and the new design method from the author's research group. The results show that the total thickness of pavement structure designd by the Civil Aviation Specifications of China is thicker than the 6E of FAA by 27 cm;the total thickness of the new design method from author's research group is closer to the 6E of FAA;the total thickness based on the the pavement structure dynamic mechanical response is thicker than static mechanical response by 15 cm. After discussing the thickness of Kunming New Airport pavement,some problems of the present design method are discussed in details. Besides,the development of design method in China is discussed and some advices are put forward for further design. Through the research,some technical references are provided for the improvement of our design theory of asphalt concrete pavement.

    Matlab Simulink library for steady flow simulation of gas pipeline networks
    CHU Fei-Xue,DING Yu
    2014, 32(4):  43-47. 
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    This study aims to grasp the operating condition through the simulation of gas transmission pipeline network using the Simulink toolkit of Matlab. Firstly,the sub-modules of pipeline nodes are established. Then they are connected based on the topological chart of the network,to shape typical models simulating dendritic and annular steady-state gas transmission pipeline networks respectively. Simulating results are compared with results obtained via operation methods adopted in other literature materials,thus verifying the models. Results indicate that our method is relatively more flexible in modeling,more practical,and more powerful in
    expansibility,and that it can be used in the steady-state simulation analysis of gas transmission pipeline network.

    Basic Science
    Rough set model based on improved prior probability
    TAO Zhi,LIU Cai-ping
    2014, 32(4):  48-51,64. 
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    Rough set models based on tolerance relation and a prior probability tolerance relation are important expansions of the rough set theory,yet there are some limitations. Combining the advantages of the two models,an improved prior probability rough set model is proposed. The new model is based on the statistics of property values in incomplete decision system,taking into account both the same attribute爷s different values and the correlation between different attributes. The model can effectively improve classification accuracy and rationality. The model has a strong practicability in system which has fewer unknown attribute values and exists a significant association in different attributes.

    Simple algorithm for projection operator
    HE Song-nian,ZHAO Zi-yi
    2014, 32(4):  52-54. 
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    A relaxed Halpern's projection algorithm is proposed. Since this algorithm computes the projection onto level set of a convex function by computing the projection onto a series of half-spaces containing a level set,it is easy to be implemented. Strong convergence of this algorithm is proved.

    Civil Aviation Management
    Flight seat inventory control model based on passenger's choosing behavior
    CHEN Rong,LIU Xiang-rong,FAN Wei
    2014, 32(4):  55-58. 
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    Aiming at the shortcomings of traditional algorithm for seat inventory control in airline revenue management,i.e.some unreasonable assumptions such as independent demand among cabins,no batch booking and no demand recapturing,a new seat inventory model is proposed based on market segmentation and careful study of passengers'choosing behavior. Taking into account the passengers'arrival distribution and passengers'choices,this model can effectively eliminate the unreasonable assumption. Market research data are used to calculate passenger arrival probability and passenger cabin choice probability. Finally,passengers'choosing behaviors are simulated by Logit model and EMSRb algorithm,simulating result proves the advantages of the current model comparing with conventional algorithms.

    Clusters structural analysis of Tianjin aviation industry based on social network analysis
    LI Yan-hua, GAO Shi-wei
    2014, 32(4):  59-64. 
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    Social network analysis(SNA)plays an important role in industrial cluster research of network structure after being introduced to the industry cluster research. By the end of 2011,Tianjin Binhai New District has registered thirty-five aviation enterprises. Based on the social network analysis theory and UCINET software,
    Tianjin aviation industry cluster network structure is analyzed for the first time,including network density,network distance,center degree,and condensed subgroup analysis. The research is important for Tianjin aviation industry‘s sustainable development.