Combat system effectiveness simulation (CSES) is a special type of complex system simulation. Three non-functional requirements (NFRs), i.e. model composability, domain specific modeling, and model evolvability, are g...Combat system effectiveness simulation (CSES) is a special type of complex system simulation. Three non-functional requirements (NFRs), i.e. model composability, domain specific modeling, and model evolvability, are gaining higher priority from CSES users when evaluating different modeling methodologies for CSES. Traditional CSES modeling methodologies are either domain-neutral (lack of domain characteristics consideration and limited support for model composability) or domain-oriented (lack of openness and evolvability) and fall short of the three NFRs. Inspired by the concept of architecture in systems engineering and software engineering fields, we extend it into a concept of model architecture for complex simulation systems, and propose a model architecture-oriented modeling methodology in which the model architecture plays a central role in achieving the three NFRs. Various model-driven engineering (MDE) approaches and technologies, including simulation modeling platform (SMP), unified modeling language (UML), domain specific modeling (DSM), eclipse modeling framework (EMF), graphical modeling framework (GMF), and so forth, are applied where possible in representing the CSES model architecture and its components' behaviors from physical and cognitive domain aspects. A prototype CSES system, called weapon effectiveness simulation system (WESS), and a non-trivial air-combat simulation example are presented to demonstrate the methodology.展开更多
Based on the finite element method(FEM)in the frequency domain and particle-in-cell approach in the time domain,a hybrid domain multipactor threshold prediction algorithm is proposed in this paper.The proposed algorit...Based on the finite element method(FEM)in the frequency domain and particle-in-cell approach in the time domain,a hybrid domain multipactor threshold prediction algorithm is proposed in this paper.The proposed algorithm has the advantages of the frequency domain and the time domain algorithms at the same time in terms of high computational accuracy and considerable computational efficiency.In addition,the compute unified device architecture(CUDA)acceleration technique also can be employed to further enhance its simulation efficiency.Numerical examples are carried out to demonstrate the effectiveness of the proposed algorithm.The results indicate that the multipactor threshold can be accurately predicted and the computational efficiency can be improved.展开更多
Many organizations have now adopted Service Oriented Architecture （SOA） as an architectural style to help them with architecture, design and implementation of their core services and systems. Most of these organizat...Many organizations have now adopted Service Oriented Architecture （SOA） as an architectural style to help them with architecture, design and implementation of their core services and systems. Most of these organizations are challenged in integrating SOA style with their overall Enterprise Architecture work. This framework links an SOA style with the Enterprise Architecture （EA） methodologies to help organizations organize their SOA effort as a key part of their Enterprise Architecture. The case study demonstrates the implementation of architecture goal with organization vision in service oriented organizational structure using services that align Business with Technology. The framework is validated and has reserved the privileges of SOA and EA.展开更多
高校多校区一体化管理中,校区间人员流动频繁,如何保证学校师生在不同校区获得一致的上网体验成为一个难题。除了加快建设多活数据中心,实现重要信息系统的容灾备份体系之外,网络基础设施服务域名系统(Domain Name System,DNS)的一体化...高校多校区一体化管理中,校区间人员流动频繁,如何保证学校师生在不同校区获得一致的上网体验成为一个难题。除了加快建设多活数据中心,实现重要信息系统的容灾备份体系之外,网络基础设施服务域名系统(Domain Name System,DNS)的一体化部署也面临新挑战。以河海大学南京校区和常州校区为例,通过多活容灾网络架构等技术手段部署一体化智能DNS服务,有效解决网络拥塞和信息系统访问瓶颈的问题,同时提升DNS管理的便捷性和服务的安全可靠性,对相关应用场景具有一定参考价值。展开更多
互联网是促进现代社会经济发展和科技创新的重要信息基础设施;然而,支撑并规范互联网正常运行的关键核心技术——互联网的TCP/IP(Transport Control Protocol/Internet Protocol)体系结构——几十年来几乎保持不变.本文首先从技术自身...互联网是促进现代社会经济发展和科技创新的重要信息基础设施;然而,支撑并规范互联网正常运行的关键核心技术——互联网的TCP/IP(Transport Control Protocol/Internet Protocol)体系结构——几十年来几乎保持不变.本文首先从技术自身弊端、社会发展需求、技术转移周期、科技革命规律四个方面论述了开展互联网体系结构创新的必要性.其次,运用系统科学原理阐明了TCP/IP体系结构弊端的根源.再次,运用系统观念揭示了信息网络的功能本质和网络间的互联本质,发现了信息传递的四个自然属性(对象属性、身份属性、位置属性、手段属性).在此基础上,简要介绍了基于两个本质和四个自然属性开展创新互联网体系结构创新的实例——共生网络.最后,结合共生网络架构展望了部署新型互联网体系结构的总体路径.展开更多
基金supported by the National Natural Science Foundation of China(61273198)
文摘Combat system effectiveness simulation (CSES) is a special type of complex system simulation. Three non-functional requirements (NFRs), i.e. model composability, domain specific modeling, and model evolvability, are gaining higher priority from CSES users when evaluating different modeling methodologies for CSES. Traditional CSES modeling methodologies are either domain-neutral (lack of domain characteristics consideration and limited support for model composability) or domain-oriented (lack of openness and evolvability) and fall short of the three NFRs. Inspired by the concept of architecture in systems engineering and software engineering fields, we extend it into a concept of model architecture for complex simulation systems, and propose a model architecture-oriented modeling methodology in which the model architecture plays a central role in achieving the three NFRs. Various model-driven engineering (MDE) approaches and technologies, including simulation modeling platform (SMP), unified modeling language (UML), domain specific modeling (DSM), eclipse modeling framework (EMF), graphical modeling framework (GMF), and so forth, are applied where possible in representing the CSES model architecture and its components' behaviors from physical and cognitive domain aspects. A prototype CSES system, called weapon effectiveness simulation system (WESS), and a non-trivial air-combat simulation example are presented to demonstrate the methodology.
基金This work was supported by the National Natural Science Foundation of China(61571022,61971022)the National Key laboratory Foundation(HTKJ2019KI504013,61424020305).
文摘Based on the finite element method(FEM)in the frequency domain and particle-in-cell approach in the time domain,a hybrid domain multipactor threshold prediction algorithm is proposed in this paper.The proposed algorithm has the advantages of the frequency domain and the time domain algorithms at the same time in terms of high computational accuracy and considerable computational efficiency.In addition,the compute unified device architecture(CUDA)acceleration technique also can be employed to further enhance its simulation efficiency.Numerical examples are carried out to demonstrate the effectiveness of the proposed algorithm.The results indicate that the multipactor threshold can be accurately predicted and the computational efficiency can be improved.
文摘Many organizations have now adopted Service Oriented Architecture （SOA） as an architectural style to help them with architecture, design and implementation of their core services and systems. Most of these organizations are challenged in integrating SOA style with their overall Enterprise Architecture work. This framework links an SOA style with the Enterprise Architecture （EA） methodologies to help organizations organize their SOA effort as a key part of their Enterprise Architecture. The case study demonstrates the implementation of architecture goal with organization vision in service oriented organizational structure using services that align Business with Technology. The framework is validated and has reserved the privileges of SOA and EA.
文摘高校多校区一体化管理中,校区间人员流动频繁,如何保证学校师生在不同校区获得一致的上网体验成为一个难题。除了加快建设多活数据中心,实现重要信息系统的容灾备份体系之外,网络基础设施服务域名系统(Domain Name System,DNS)的一体化部署也面临新挑战。以河海大学南京校区和常州校区为例,通过多活容灾网络架构等技术手段部署一体化智能DNS服务,有效解决网络拥塞和信息系统访问瓶颈的问题,同时提升DNS管理的便捷性和服务的安全可靠性,对相关应用场景具有一定参考价值。
文摘互联网是促进现代社会经济发展和科技创新的重要信息基础设施;然而,支撑并规范互联网正常运行的关键核心技术——互联网的TCP/IP(Transport Control Protocol/Internet Protocol)体系结构——几十年来几乎保持不变.本文首先从技术自身弊端、社会发展需求、技术转移周期、科技革命规律四个方面论述了开展互联网体系结构创新的必要性.其次,运用系统科学原理阐明了TCP/IP体系结构弊端的根源.再次,运用系统观念揭示了信息网络的功能本质和网络间的互联本质,发现了信息传递的四个自然属性(对象属性、身份属性、位置属性、手段属性).在此基础上,简要介绍了基于两个本质和四个自然属性开展创新互联网体系结构创新的实例——共生网络.最后,结合共生网络架构展望了部署新型互联网体系结构的总体路径.
