Fireworks products are energy-containing materials and are hazardous during production,storage,transportation,and use.By analyzing the range of civil aviation ground ambient temperature and civil aviation cabin ambien...Fireworks products are energy-containing materials and are hazardous during production,storage,transportation,and use.By analyzing the range of civil aviation ground ambient temperature and civil aviation cabin ambient temperature in storage and ground operation as well as establishing a spontaneous combustion mathematical model for cylindrical fireworks products based on the spontaneous combustion theory,we identified the critical temperature for spontaneous combustion of a single spray and analyzed the thermal safety of fireworks products under the civil aviation ambient temperature by example to provide theoretical support for the feasibility study of transporting fireworks products by civil aviation.展开更多
The civil aviation industry, with the key role of promoting hitech development, enhancing national strength, providing work opportunities, and guaranteeing aviation safety, is regarded as one of the leading hi-tech in...The civil aviation industry, with the key role of promoting hitech development, enhancing national strength, providing work opportunities, and guaranteeing aviation safety, is regarded as one of the leading hi-tech industries in the industrialized world, and civil aircraft are the industry’s basic products, which are value-added, andpromote the production of their展开更多
In order to promote the application and development of civil aviation safety(CAS)in the field of safety and enrich the theoretical system of CAS research,the methodology of CAS was studied.The definition of CAS was re...In order to promote the application and development of civil aviation safety(CAS)in the field of safety and enrich the theoretical system of CAS research,the methodology of CAS was studied.The definition of CAS was reconstructed,its connotation was explained from four aspects,and its research object was clarified.This paper discussed the mechanism of CAS,that is,to maintain system security through the establishment of safety prevention and control system(SPCS),and explained the research content of CAS from theory and technology application.Five principles and applicable methods for CAS research were summarized.In addition,it put forward the general procedure of CAS research,explained the specific content and implementation method or basis of each step.The research results show that the methodology of CAS is a systematic theoretical system with certain guiding significance,combined with the mechanism,research content,research principles and methods,and research procedures of CAS.展开更多
Early in 1979,China beganconsidering the drawing up of alaw to govern and standardize theactivities of its civil air operations. At that time,air legislation wassomething nonexistent in China.Thedraft team assembled f...Early in 1979,China beganconsidering the drawing up of alaw to govern and standardize theactivities of its civil air operations. At that time,air legislation wassomething nonexistent in China.Thedraft team assembled forces totranslate the air laws of various foreigncountries,including the United States,Britain,Japan and the former SovietUnion,and the relevant internationalconventions,and conducted a deep-going study of them.They also madeinspection tours of the United States,Canada,Britain and Germany.Onthe basis of the study of and withreference to the advanced legislativepractices in foreign countries,thedraft team put forward its first draft ofthe air law in July 1983,in accordancewith the actual conditions of thecountry.It was not,however,submitted to an executive meetingof the State Council for examinationand discussion because a series ofmajor problems such as air trafficcontrol and the control over theairworthiness of aircraft,had to befurther investigated and studied.展开更多
Not long ago, Bao Peide, DeputyDirector-General of the Civil AviationAdminstration of China (CAAC),briefed Chinese and foreign reporters on thegeneral development trend of China’s civilaviation industry.
With the enhancement of our country's comprehensive national strength, the unprecedented development of China's civil aviation provided more professional demand of civil aviation for society and also brought o...With the enhancement of our country's comprehensive national strength, the unprecedented development of China's civil aviation provided more professional demand of civil aviation for society and also brought opportunities for vocational colleges in our country. This paper will takes Civil Aviation English Listening and Speaking course of flight attendants and aviation service majors in Chongqing Hailian Vocational for example. Several suggestions on civil aviation English teaching are put forward simply. It will discuss how to carry on the effective teaching of English curriculum reform.展开更多
In the process of developing the C919 large aircraft customer service intelligence system,we find that heterogeneous and incomplete data cause the inefficient and inaccurate decision making.Thus,to solve this problem,...In the process of developing the C919 large aircraft customer service intelligence system,we find that heterogeneous and incomplete data cause the inefficient and inaccurate decision making.Thus,to solve this problem,we propose to introduce the idea of ontology modeling and reasoning into competitive intelligence system building in this paper.We first present the building principles and methods of the civil aviation customer service ontology.We then define the classes and properties to contribute a real-world civil aviation customer service ontology,which is published on the Web(http:/www.openkg.cn/dataset/cacso).We finally design SWRL rules corresponding to different intelligence analysis targets to support reasoning in our designed competitive intelligence system.展开更多
As an important infrastructure system, civil aviation network system can be severely affected by natural hazards. Although a natural hazard is usually local, its impact, through the network topology, can become global...As an important infrastructure system, civil aviation network system can be severely affected by natural hazards. Although a natural hazard is usually local, its impact, through the network topology, can become global.Inspired by Wilkinson's work in 2012, this article proposes a new quantitative spatial vulnerability model for network systems, which emphasizes the spreading impact of spatially localized hazards on these systems. This model considers hazard location and area covered by a hazard,and spatially spreading impact of the hazard(including direct impact and indirect impact through network topology) and proposes an absolute spatial vulnerability index and a relative spatial vulnerability index to reflect the vulnerability of a network system to local hazards. The model is then applied to study the spatial vulnerability of the Chinese civil aviation network system. The simulation results show that(1) the proposed model is effective and useful to study spatial vulnerability of civil aviation network systems as the results well explain the general situation of the Chinese civil aviation system; and(2) the Chinese civil aviation network system is highly vulnerable to local hazards when indirect impacts through network connections are considered.展开更多
International tourism is highly dependent on air travel,which enhances destination countries’economic growth and living standards while causing environmental degradation.This study investigates the effect of air trav...International tourism is highly dependent on air travel,which enhances destination countries’economic growth and living standards while causing environmental degradation.This study investigates the effect of air travel on environmental degradation in BRICS nations.The study used feasible generalized least squares(FGLS)to evaluate the environmental Kuznets curve using data spanning 1995 to 2018.The study finds evidence of N-shaped EKC in the economies of the BRICS nations.We also find a positive relationship between tourism,urbanization,and environmental degradation(as measured by CO_(2) and SO_(2) emissions from civil aviation)and a negative relationship between economic development and environmental degradation.To achieve sustainable growth and environmental protection and promote green technology,the BRICS governments should devise policies that address the aviation industry’s short-and long-term needs.展开更多
China National Aviation Industry Corpora-tion (CAIC) has developed a complete system for production and sale of leading products mini-vehicles (including mini-cars), as well as e-conomic and luxurious coaches, tank tr...China National Aviation Industry Corpora-tion (CAIC) has developed a complete system for production and sale of leading products mini-vehicles (including mini-cars), as well as e-conomic and luxurious coaches, tank trucks, wrecker truck, garbage trucks, motorcycles展开更多
Safety is one of the important topics in the field of civil aviation. Auxiliary Power Unit(APU) is one of important components in aircraft, which provides electrical power and compressed air for aircraft. The hazards ...Safety is one of the important topics in the field of civil aviation. Auxiliary Power Unit(APU) is one of important components in aircraft, which provides electrical power and compressed air for aircraft. The hazards in APU are prone to cause economic losses and even casualties. So,actively identifying the hazards in APU before an accident occurs is necessary. In this paper, a Hybrid Deep Neural Network(HDNN) based on multi-time window convolutional neural network-Bidirectional Long Short-Term Memory(CNN-Bi LSTM) neural network is proposed for active hazard identification of APU in civil aircraft. In order to identify the risks caused by different types of failures, the proposed HDNN simultaneously integrates three CNN-Bi LSTM basic models with different time window sizes in parallel by using a fully connected neural network. The CNN-Bi LSTM basic model can automatically extract features representing the system state from the input data and learn the time information of irregular trends in the time series data. Nine benchmark models are compared with the proposed HDNN. The comparison results show that the proposed HDNN has the highest identification accuracy. The HDNN has the most stable identification performance for data with imbalanced samples.展开更多
A 2%scale,cruising version of a 450-seat class Blended-Wing-Body(BWB)transport was tested in the China Aerodynamic Research and Development Center’s FL-262.4-by-2.4-meter subsonic wind tunnel.The focus of the wind tu...A 2%scale,cruising version of a 450-seat class Blended-Wing-Body(BWB)transport was tested in the China Aerodynamic Research and Development Center’s FL-262.4-by-2.4-meter subsonic wind tunnel.The focus of the wind tunnel test was to investigate the aerodynamic performance of the latest BWB transport design,which would also aid in choosing a final engine arrangement in the three most potential engine integration layouts.The wind tunnel model can be tested with and without the nacelle and has three sets of different nacelle/tail integration positions.Computational Fluid Dynamics(CFD)simulations were performed in engine-aircraft integration design to find appropriate nacelle installing parameters of each layout.The comparison of CFD with experimental results shows good agreement.Wind tunnel measurements indicate that the tail-mounted engine layout produces the minimum drag penalty,while the fuselage-mounted engine layout increases drag the most.Experimental pressure measurement illustrates the effect of nacelle integration on the wing-body surface pressure distribution.This experimental and numerical research provides a reference for future BWB Propulsion-Airframe Integration(PAI)design.展开更多
基金“Chenguang Program”supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission(16CGB28).
文摘Fireworks products are energy-containing materials and are hazardous during production,storage,transportation,and use.By analyzing the range of civil aviation ground ambient temperature and civil aviation cabin ambient temperature in storage and ground operation as well as establishing a spontaneous combustion mathematical model for cylindrical fireworks products based on the spontaneous combustion theory,we identified the critical temperature for spontaneous combustion of a single spray and analyzed the thermal safety of fireworks products under the civil aviation ambient temperature by example to provide theoretical support for the feasibility study of transporting fireworks products by civil aviation.
文摘The civil aviation industry, with the key role of promoting hitech development, enhancing national strength, providing work opportunities, and guaranteeing aviation safety, is regarded as one of the leading hi-tech industries in the industrialized world, and civil aircraft are the industry’s basic products, which are value-added, andpromote the production of their
文摘In order to promote the application and development of civil aviation safety(CAS)in the field of safety and enrich the theoretical system of CAS research,the methodology of CAS was studied.The definition of CAS was reconstructed,its connotation was explained from four aspects,and its research object was clarified.This paper discussed the mechanism of CAS,that is,to maintain system security through the establishment of safety prevention and control system(SPCS),and explained the research content of CAS from theory and technology application.Five principles and applicable methods for CAS research were summarized.In addition,it put forward the general procedure of CAS research,explained the specific content and implementation method or basis of each step.The research results show that the methodology of CAS is a systematic theoretical system with certain guiding significance,combined with the mechanism,research content,research principles and methods,and research procedures of CAS.
文摘Early in 1979,China beganconsidering the drawing up of alaw to govern and standardize theactivities of its civil air operations. At that time,air legislation wassomething nonexistent in China.Thedraft team assembled forces totranslate the air laws of various foreigncountries,including the United States,Britain,Japan and the former SovietUnion,and the relevant internationalconventions,and conducted a deep-going study of them.They also madeinspection tours of the United States,Canada,Britain and Germany.Onthe basis of the study of and withreference to the advanced legislativepractices in foreign countries,thedraft team put forward its first draft ofthe air law in July 1983,in accordancewith the actual conditions of thecountry.It was not,however,submitted to an executive meetingof the State Council for examinationand discussion because a series ofmajor problems such as air trafficcontrol and the control over theairworthiness of aircraft,had to befurther investigated and studied.
文摘Not long ago, Bao Peide, DeputyDirector-General of the Civil AviationAdminstration of China (CAAC),briefed Chinese and foreign reporters on thegeneral development trend of China’s civilaviation industry.
文摘With the enhancement of our country's comprehensive national strength, the unprecedented development of China's civil aviation provided more professional demand of civil aviation for society and also brought opportunities for vocational colleges in our country. This paper will takes Civil Aviation English Listening and Speaking course of flight attendants and aviation service majors in Chongqing Hailian Vocational for example. Several suggestions on civil aviation English teaching are put forward simply. It will discuss how to carry on the effective teaching of English curriculum reform.
基金the National Natural Science Foundation of China(Grant No.U21B6001,62006040,62376058,U21A20488)the Fundamental Research Funds for the Central Universities,and ZhiShan Young Scholar Program of Southeast University.We thank the Big Data Computing Center of Southeast University for providing the facility support on the numerical calculations in this paper.
文摘In the process of developing the C919 large aircraft customer service intelligence system,we find that heterogeneous and incomplete data cause the inefficient and inaccurate decision making.Thus,to solve this problem,we propose to introduce the idea of ontology modeling and reasoning into competitive intelligence system building in this paper.We first present the building principles and methods of the civil aviation customer service ontology.We then define the classes and properties to contribute a real-world civil aviation customer service ontology,which is published on the Web(http:/www.openkg.cn/dataset/cacso).We finally design SWRL rules corresponding to different intelligence analysis targets to support reasoning in our designed competitive intelligence system.
基金supported in part by the National Basic Research Program of China (Grant No.2012CB955404)the National Natural Science Foundation of China (Grant No.61472041)the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No.41321001)
文摘As an important infrastructure system, civil aviation network system can be severely affected by natural hazards. Although a natural hazard is usually local, its impact, through the network topology, can become global.Inspired by Wilkinson's work in 2012, this article proposes a new quantitative spatial vulnerability model for network systems, which emphasizes the spreading impact of spatially localized hazards on these systems. This model considers hazard location and area covered by a hazard,and spatially spreading impact of the hazard(including direct impact and indirect impact through network topology) and proposes an absolute spatial vulnerability index and a relative spatial vulnerability index to reflect the vulnerability of a network system to local hazards. The model is then applied to study the spatial vulnerability of the Chinese civil aviation network system. The simulation results show that(1) the proposed model is effective and useful to study spatial vulnerability of civil aviation network systems as the results well explain the general situation of the Chinese civil aviation system; and(2) the Chinese civil aviation network system is highly vulnerable to local hazards when indirect impacts through network connections are considered.
文摘International tourism is highly dependent on air travel,which enhances destination countries’economic growth and living standards while causing environmental degradation.This study investigates the effect of air travel on environmental degradation in BRICS nations.The study used feasible generalized least squares(FGLS)to evaluate the environmental Kuznets curve using data spanning 1995 to 2018.The study finds evidence of N-shaped EKC in the economies of the BRICS nations.We also find a positive relationship between tourism,urbanization,and environmental degradation(as measured by CO_(2) and SO_(2) emissions from civil aviation)and a negative relationship between economic development and environmental degradation.To achieve sustainable growth and environmental protection and promote green technology,the BRICS governments should devise policies that address the aviation industry’s short-and long-term needs.
文摘China National Aviation Industry Corpora-tion (CAIC) has developed a complete system for production and sale of leading products mini-vehicles (including mini-cars), as well as e-conomic and luxurious coaches, tank trucks, wrecker truck, garbage trucks, motorcycles
基金co-supported by National Natural Science Foundation of China(No.U1933202)Natural Science Foundation of Civil Aviation University of China(No.U1733201)+1 种基金China Scholarship Council(CSC)(No.201906830043)Postgraduate Research&Practice Innovation Program of Jiangsu Province,China(Nos.KYCX18_0310 and KYCX18_0265)。
文摘Safety is one of the important topics in the field of civil aviation. Auxiliary Power Unit(APU) is one of important components in aircraft, which provides electrical power and compressed air for aircraft. The hazards in APU are prone to cause economic losses and even casualties. So,actively identifying the hazards in APU before an accident occurs is necessary. In this paper, a Hybrid Deep Neural Network(HDNN) based on multi-time window convolutional neural network-Bidirectional Long Short-Term Memory(CNN-Bi LSTM) neural network is proposed for active hazard identification of APU in civil aircraft. In order to identify the risks caused by different types of failures, the proposed HDNN simultaneously integrates three CNN-Bi LSTM basic models with different time window sizes in parallel by using a fully connected neural network. The CNN-Bi LSTM basic model can automatically extract features representing the system state from the input data and learn the time information of irregular trends in the time series data. Nine benchmark models are compared with the proposed HDNN. The comparison results show that the proposed HDNN has the highest identification accuracy. The HDNN has the most stable identification performance for data with imbalanced samples.
基金This study was co-supported by the Beijing Key Laboratory of Simulation Technology for Civil Aircraft Design,China(No.11WX08)Innovation Foundation of COMAC Beijing Aircraft Technology Research Institute,China(No.Y16QT01).
文摘A 2%scale,cruising version of a 450-seat class Blended-Wing-Body(BWB)transport was tested in the China Aerodynamic Research and Development Center’s FL-262.4-by-2.4-meter subsonic wind tunnel.The focus of the wind tunnel test was to investigate the aerodynamic performance of the latest BWB transport design,which would also aid in choosing a final engine arrangement in the three most potential engine integration layouts.The wind tunnel model can be tested with and without the nacelle and has three sets of different nacelle/tail integration positions.Computational Fluid Dynamics(CFD)simulations were performed in engine-aircraft integration design to find appropriate nacelle installing parameters of each layout.The comparison of CFD with experimental results shows good agreement.Wind tunnel measurements indicate that the tail-mounted engine layout produces the minimum drag penalty,while the fuselage-mounted engine layout increases drag the most.Experimental pressure measurement illustrates the effect of nacelle integration on the wing-body surface pressure distribution.This experimental and numerical research provides a reference for future BWB Propulsion-Airframe Integration(PAI)design.
