The increasingly complex battlefield environment requests much closer connection in a team having both manned and unmanned aerial vehicles(MAVs and UAVs). This special heterogeneous team structure causes demands for e...The increasingly complex battlefield environment requests much closer connection in a team having both manned and unmanned aerial vehicles(MAVs and UAVs). This special heterogeneous team structure causes demands for effective organizational structure design solutions. Implementing adjustable autonomy in the organizational structure, the expected evaluation function is established based on the physical resource, intelligent resource, network efficiency, network vulnerability and task execution reliability. According to the above constraints, together with interaction latency, decision-making information processing capacity, and decision-making latency, we aim to find a preferential organizational structure. The proposed organizational structure includes cooperative relationships, supervisory control relationships, and decision-making authorization relationships. In addition,by considering the influence on the intelligent support capabilities and the task execution reliability created by adjustable autonomy, it helps to build the proposed organizational structure designed with certain degree of flexibility to deal with the potential changes in the unpredictable battlefield environment. Simulation is conducted to confirm our design to be valid. And the method is still valid under different battlefield environments and interventions.展开更多
Time-limited dispatching(TLD)analysis of the full authority digital engine control(FADEC)systems is an important part of the aircraft system safety analysis and a necessary task for the certification of commercial air...Time-limited dispatching(TLD)analysis of the full authority digital engine control(FADEC)systems is an important part of the aircraft system safety analysis and a necessary task for the certification of commercial aircraft and aeroengines.In the time limited dispatch guidance document ARP5107B,a single-fault Markov model(MM)approach is proposed for TLD analysis.However,ARP5107B also requires that the loss of thrust control(LOTC)rate error calculated by applying the single-fault MM must be less than 5%when performing airworthiness certification.Firstly,the sources of accuracy errors in three kinds of MM are analyzed and specified through a case study of the general FADEC system,and secondly a two-fault MM considering maintenance policy is established through analyzing and calculating the expected repair time when two related faults happen.Finally,a specific FADEC system is given to study on the influence factors of accuracy error in the single-fault MM,and the results show that the accuracy error of the single-fault MM decreases with the increase of short or long prescribed dispatch time,and the range values of short time(ST)and long time(LT)are determined to satisfy the requirement of accuracy error within 5%.展开更多
Authors’ first and last names were interchanged in the original version of the article and they should be replaced as follows: Majid Siavashi, Mohammad Jamali.
When developing and integrating a new environmental legal system under the Environmental Code,the joint regulation of ecology and environment,natural resources and an energy beyond the sphere of mere environmental con...When developing and integrating a new environmental legal system under the Environmental Code,the joint regulation of ecology and environment,natural resources and an energy beyond the sphere of mere environmental concerns can be achieved;the semantic expression of environmental regulation can be expounded.Additionally,through the codification of environmental law,a revolutionary path for the structure of authority can be found.Environmental codification dictates a method for clarification of the boundaries and relations of environmental management authority.Under the theory of Holistic Governance and in the codification process,the reform of environmental regulation authority should be concluded from both vertical and horizontal dimensions,through organizing,integrating,separating,classifying and finally,by establishing a synergy between the central and local governments and their departments.This can break down structural barriers to communication and cooperation of the ecological regulation and resource management authority and help establish uniformity of environmental regulation.展开更多
This paper theoretically analyzes a deficiency of the existing scheme, and proposes a distributed multi-hop certification authority scheme for mobile Ad Hoc networks. In our design, we distribute the certification aut...This paper theoretically analyzes a deficiency of the existing scheme, and proposes a distributed multi-hop certification authority scheme for mobile Ad Hoc networks. In our design, we distribute the certification authority functions through a threshold secret sharing mechanism, in which each node holds a secret share and multiple nodes jointly provide complete services. Certification authority is not limited in a local neighborhood but can be completed within multi-hop location. In addition, we replace broadcast by multicast to improve system performance and reduce communication overhead. This paper resolves some technical problems of ubiquitous certification authority services, and presents a wieldy multi-hop certification authority algorithm. Simulation results confirm the availability and effectiveness of our design.展开更多
Earth Science Frontiers is a bi-monthly publication in Chinese with English abstracts for most papers; a few articles are published entirely in English. It is a medium for the publication of original and forefront res...Earth Science Frontiers is a bi-monthly publication in Chinese with English abstracts for most papers; a few articles are published entirely in English. It is a medium for the publication of original and forefront research and high quality reviews covering recent advances in all fields of Earth Sciences. Each issue is devoted to a single topic and edited by an authority in that field.展开更多
Aimed at the needs of developing the CAI courseware with popularization, the expression ways for hypercard based information, and the key principles of the development for authoring tools, were discussed. The ideas of...Aimed at the needs of developing the CAI courseware with popularization, the expression ways for hypercard based information, and the key principles of the development for authoring tools, were discussed. The ideas of the revised hypermedia chaining structure were introduced. The framework of the courseware authoring tool, its function design and the methods of technical realization for system software were also involved.展开更多
1.Journal of Yunnan Agricultural University is spon-sored by Yunnan Agricultural University and has been published since1986.The journal was initially pub-lished semi-annually,and changed to quarterly in1989and bimont...1.Journal of Yunnan Agricultural University is spon-sored by Yunnan Agricultural University and has been published since1986.The journal was initially pub-lished semi-annually,and changed to quarterly in1989and bimonthly in2004.As a comprehensive sci-entific periodical publication in China and abroad,Journal of Yunnan Agricultural University won the ti-tles of Chinese core journals,the core of Chinais sci-ence and technology journals,the core of Chinai ag-ricultural science journals.展开更多
The Department of Water Resources and Harbour Engineering was originally a division of hydraulic engineering in the Department of Civil Engineering in Peiyang University the first modern university founded in China in...The Department of Water Resources and Harbour Engineering was originally a division of hydraulic engineering in the Department of Civil Engineering in Peiyang University the first modern university founded in China in 1933. Since then, about 5000 students have graduated from the Department.展开更多
The founding of the Department of Marine Geology can be traced back to ShandongCollege of Geology founded in the late 1950s in Qingdao.After some 30 years of ups anddowns,through painstaking efforts,above all through ...The founding of the Department of Marine Geology can be traced back to ShandongCollege of Geology founded in the late 1950s in Qingdao.After some 30 years of ups anddowns,through painstaking efforts,above all through the perios of rapid developmentbrought about by the policies of reform and opening to the world since the Third PlenarySession of the Eleventh Central Committee of the CPC,it has grown into a departmentquite large in scale.There are at present five specialities:marine geology。展开更多
Research papers encompassing forest sciences,forest pest and disease control,forest resources information management,soil and water conservation,land-scape architecture and plants,forest machinery,timber processing,fo...Research papers encompassing forest sciences,forest pest and disease control,forest resources information management,soil and water conservation,land-scape architecture and plants,forest machinery,timber processing,forest chem-icals and forest economics and management,besides those with experimentaland interdisciplinary approaches,are accepted for the publication in Journal ofBeijing Forestry University(English Edition).The maximum length of the pa-per is usually restricted to 12 pages.Short communications presenting interesting findings in one or two pages展开更多
基金supported by the National Natural Science Foundation of China(61305133)the Aeronautical Science Foundation of China(2016ZC53020)the Fundamental Research Funds for the Central Universities(3102017jg02015)
文摘The increasingly complex battlefield environment requests much closer connection in a team having both manned and unmanned aerial vehicles(MAVs and UAVs). This special heterogeneous team structure causes demands for effective organizational structure design solutions. Implementing adjustable autonomy in the organizational structure, the expected evaluation function is established based on the physical resource, intelligent resource, network efficiency, network vulnerability and task execution reliability. According to the above constraints, together with interaction latency, decision-making information processing capacity, and decision-making latency, we aim to find a preferential organizational structure. The proposed organizational structure includes cooperative relationships, supervisory control relationships, and decision-making authorization relationships. In addition,by considering the influence on the intelligent support capabilities and the task execution reliability created by adjustable autonomy, it helps to build the proposed organizational structure designed with certain degree of flexibility to deal with the potential changes in the unpredictable battlefield environment. Simulation is conducted to confirm our design to be valid. And the method is still valid under different battlefield environments and interventions.
基金supported by the National Natural Science Foundation of China(51705242)Shanghai Sailing Program(16YF1404900)the Fundamental Research Funds for the Central Universities(NS2015072)
文摘Time-limited dispatching(TLD)analysis of the full authority digital engine control(FADEC)systems is an important part of the aircraft system safety analysis and a necessary task for the certification of commercial aircraft and aeroengines.In the time limited dispatch guidance document ARP5107B,a single-fault Markov model(MM)approach is proposed for TLD analysis.However,ARP5107B also requires that the loss of thrust control(LOTC)rate error calculated by applying the single-fault MM must be less than 5%when performing airworthiness certification.Firstly,the sources of accuracy errors in three kinds of MM are analyzed and specified through a case study of the general FADEC system,and secondly a two-fault MM considering maintenance policy is established through analyzing and calculating the expected repair time when two related faults happen.Finally,a specific FADEC system is given to study on the influence factors of accuracy error in the single-fault MM,and the results show that the accuracy error of the single-fault MM decreases with the increase of short or long prescribed dispatch time,and the range values of short time(ST)and long time(LT)are determined to satisfy the requirement of accuracy error within 5%.
文摘Authors’ first and last names were interchanged in the original version of the article and they should be replaced as follows: Majid Siavashi, Mohammad Jamali.
文摘When developing and integrating a new environmental legal system under the Environmental Code,the joint regulation of ecology and environment,natural resources and an energy beyond the sphere of mere environmental concerns can be achieved;the semantic expression of environmental regulation can be expounded.Additionally,through the codification of environmental law,a revolutionary path for the structure of authority can be found.Environmental codification dictates a method for clarification of the boundaries and relations of environmental management authority.Under the theory of Holistic Governance and in the codification process,the reform of environmental regulation authority should be concluded from both vertical and horizontal dimensions,through organizing,integrating,separating,classifying and finally,by establishing a synergy between the central and local governments and their departments.This can break down structural barriers to communication and cooperation of the ecological regulation and resource management authority and help establish uniformity of environmental regulation.
文摘This paper theoretically analyzes a deficiency of the existing scheme, and proposes a distributed multi-hop certification authority scheme for mobile Ad Hoc networks. In our design, we distribute the certification authority functions through a threshold secret sharing mechanism, in which each node holds a secret share and multiple nodes jointly provide complete services. Certification authority is not limited in a local neighborhood but can be completed within multi-hop location. In addition, we replace broadcast by multicast to improve system performance and reduce communication overhead. This paper resolves some technical problems of ubiquitous certification authority services, and presents a wieldy multi-hop certification authority algorithm. Simulation results confirm the availability and effectiveness of our design.
文摘Earth Science Frontiers is a bi-monthly publication in Chinese with English abstracts for most papers; a few articles are published entirely in English. It is a medium for the publication of original and forefront research and high quality reviews covering recent advances in all fields of Earth Sciences. Each issue is devoted to a single topic and edited by an authority in that field.
文摘Aimed at the needs of developing the CAI courseware with popularization, the expression ways for hypercard based information, and the key principles of the development for authoring tools, were discussed. The ideas of the revised hypermedia chaining structure were introduced. The framework of the courseware authoring tool, its function design and the methods of technical realization for system software were also involved.
文摘1.Journal of Yunnan Agricultural University is spon-sored by Yunnan Agricultural University and has been published since1986.The journal was initially pub-lished semi-annually,and changed to quarterly in1989and bimonthly in2004.As a comprehensive sci-entific periodical publication in China and abroad,Journal of Yunnan Agricultural University won the ti-tles of Chinese core journals,the core of Chinais sci-ence and technology journals,the core of Chinai ag-ricultural science journals.
文摘The Department of Water Resources and Harbour Engineering was originally a division of hydraulic engineering in the Department of Civil Engineering in Peiyang University the first modern university founded in China in 1933. Since then, about 5000 students have graduated from the Department.
文摘The founding of the Department of Marine Geology can be traced back to ShandongCollege of Geology founded in the late 1950s in Qingdao.After some 30 years of ups anddowns,through painstaking efforts,above all through the perios of rapid developmentbrought about by the policies of reform and opening to the world since the Third PlenarySession of the Eleventh Central Committee of the CPC,it has grown into a departmentquite large in scale.There are at present five specialities:marine geology。
文摘Research papers encompassing forest sciences,forest pest and disease control,forest resources information management,soil and water conservation,land-scape architecture and plants,forest machinery,timber processing,forest chem-icals and forest economics and management,besides those with experimentaland interdisciplinary approaches,are accepted for the publication in Journal ofBeijing Forestry University(English Edition).The maximum length of the pa-per is usually restricted to 12 pages.Short communications presenting interesting findings in one or two pages
