Digital twin is currently undergoing a significant transformation from the conceptual and theoretical research phase to the implementation and application phase.However,a universally adaptable research and development...Digital twin is currently undergoing a significant transformation from the conceptual and theoretical research phase to the implementation and application phase.However,a universally adaptable research and development platform for digital twin is critically needed to meet the development requirements.Specifically,a publicly accessible simulation,testing,and validation platform which can support digital twin model building,data processing,algorithm design,configuration,etc.,is urgently required for researchers.Furthermore,for developers from the industry,a lowcode development platform that can offer a customizable suite of functions such as model creation,data management,protocol configuration,and visualization is urgently needed.Meanwhile,for enterprise users,there is a lack of an application management platform that can be configured and migrated for various application scenarios,functions,and modes.Therefore,based on the system research of digital twin theories and key technologies by the authors(such as the five-dimension digital twin model,digital twin modeling and digital twin data theory,digital twin standards,and so on),a digital twin software platform reference architecture,namely make Twin,is proposed and designed,as well as its ten core functions.The workflow of the make Twin and the interaction mechanisms among its core functions are described.Finally,a digital twin application system for a chemical fiber textile shop floor(CFTS)which was developed according to make Twin,is introduced,which validates the proposed reference architecture.展开更多
In the first editorial of this two-part special issue, we pointed out that one of the biggest trends in wireless broadband, radar, sonar, and broadcasting technology is software RF processing and digital front-end [1]...In the first editorial of this two-part special issue, we pointed out that one of the biggest trends in wireless broadband, radar, sonar, and broadcasting technology is software RF processing and digital front-end [1]. Thistrend encompasses signal processing algorithms and integrated circuit design and includes digital pre-distortion （DPD）, conversions between digital and analog signals, digita up-conversion （DUC）, digital down-conversion （DDC）, DC offset,展开更多
One of the biggest technology trends in wireless broadband, radar, sonar, and broadcasting systems is software radio frequency processing and digital front-end. This trend encompasses a broad range of topics, from ci...One of the biggest technology trends in wireless broadband, radar, sonar, and broadcasting systems is software radio frequency processing and digital front-end. This trend encompasses a broad range of topics, from circuit design and signal processing to system integration. It includes digital up-conversion （DUC） and down-conversion （DDC）, digital predistortion （DPD）,展开更多
Surveying and mapping work is often disturbed by the surrounding environment, geographical location and other factors, resulting in surveying and mapping difficulty and the obtained data is not accurate. In order to e...Surveying and mapping work is often disturbed by the surrounding environment, geographical location and other factors, resulting in surveying and mapping difficulty and the obtained data is not accurate. In order to ensure the efficiency of data collection, we should strengthen the use of digital mapping software, and integrate the industry and off-industry work together, so that the industry and outside work groups can be carried out simultaneously. Due to the limitations of technology, professional ability and other aspects, some surveying and mapping personnel can not quickly master the application skills of digital mapping software, can not control the quality scientifically, so in the future work period to strengthen the attention to these two aspects.展开更多
A software for the management of computer aided design（CAD） drawings was developed. It can be used to classify and register information including geometric features of the drawings, and to search appropriate referen...A software for the management of computer aided design（CAD） drawings was developed. It can be used to classify and register information including geometric features of the drawings, and to search appropriate reference drawings matching the given conditions of a new design. The thumbnails of the drawings can be displayed in an order of preference and can be used to zoom and access the PDF file or CAD data of a selected drawing. The thumbnails and the data structure are two key elements of the software.展开更多
Some structures of digital quadrature AD conversion for soft-ware-defined radio （SDR） systems are studied. Their performances and affections on the SDR systems are also analyzed. Two generalized quadrature AD scheme...Some structures of digital quadrature AD conversion for soft-ware-defined radio （SDR） systems are studied. Their performances and affections on the SDR systems are also analyzed. Two generalized quadrature AD schemes are proposed. In one of them, the AD sampling speed can be reduced by 2 times; and in the other both the output data rate of every channel and AD sampling speed can be lowered by paralleling the digital quadrature filtering structure. These structures can be also easily implemented into modules, and the polyphase filters can be flexibly realized by VHDL language based one chip of FPGA. To assess the proposed schemes, their applications to a particular ultra wideband （UWB） demonstrative receiver system are introduced. Some experimental results are also given. It is shown that the generalized quadrature AD structures are reliable and feasible for its module design, and performances are improved obviously for its better performance to price ratio.展开更多
Power grid simulation calculation iswidely used in fields such as power grid operation,planning,safety defense,and accident inversion,which is one of the fundamental support technologies for power grid operation.At pr...Power grid simulation calculation iswidely used in fields such as power grid operation,planning,safety defense,and accident inversion,which is one of the fundamental support technologies for power grid operation.At present,mainstream software for power grid simulation calculation used by domestic power grid enterprises include PSD Power Tools,Power System Analysis Software Package(PSASP),Advanced Digital Power System Simulator(ADPSS)and so on,which can provide various simulation calculation functions such as power flow calculation,transient stability calculation,short circuit current calculation,etc.But in the process of using these software,various calculation data adjustments still rely entirely on manual experience.This article introduces artificial intelligence technology into power grid simulation calculation and develops an intelligent power system analysis platform which can be used in the simulation for large power grids,achieving the combination of artificial intelligence technology and power grid simulation technology,which can provide technical support for the transformation of power grid simulation and analysis work mode.展开更多
基金financially supported in part by the National Key Research and Development Program of China under Grant 2020YFB1708400the National Natural Science Foundation of China(NSFC)under Grant 52120105008 and Grants 52005026。
文摘Digital twin is currently undergoing a significant transformation from the conceptual and theoretical research phase to the implementation and application phase.However,a universally adaptable research and development platform for digital twin is critically needed to meet the development requirements.Specifically,a publicly accessible simulation,testing,and validation platform which can support digital twin model building,data processing,algorithm design,configuration,etc.,is urgently required for researchers.Furthermore,for developers from the industry,a lowcode development platform that can offer a customizable suite of functions such as model creation,data management,protocol configuration,and visualization is urgently needed.Meanwhile,for enterprise users,there is a lack of an application management platform that can be configured and migrated for various application scenarios,functions,and modes.Therefore,based on the system research of digital twin theories and key technologies by the authors(such as the five-dimension digital twin model,digital twin modeling and digital twin data theory,digital twin standards,and so on),a digital twin software platform reference architecture,namely make Twin,is proposed and designed,as well as its ten core functions.The workflow of the make Twin and the interaction mechanisms among its core functions are described.Finally,a digital twin application system for a chemical fiber textile shop floor(CFTS)which was developed according to make Twin,is introduced,which validates the proposed reference architecture.
文摘In the first editorial of this two-part special issue, we pointed out that one of the biggest trends in wireless broadband, radar, sonar, and broadcasting technology is software RF processing and digital front-end [1]. Thistrend encompasses signal processing algorithms and integrated circuit design and includes digital pre-distortion （DPD）, conversions between digital and analog signals, digita up-conversion （DUC）, digital down-conversion （DDC）, DC offset,
文摘One of the biggest technology trends in wireless broadband, radar, sonar, and broadcasting systems is software radio frequency processing and digital front-end. This trend encompasses a broad range of topics, from circuit design and signal processing to system integration. It includes digital up-conversion （DUC） and down-conversion （DDC）, digital predistortion （DPD）,
文摘Surveying and mapping work is often disturbed by the surrounding environment, geographical location and other factors, resulting in surveying and mapping difficulty and the obtained data is not accurate. In order to ensure the efficiency of data collection, we should strengthen the use of digital mapping software, and integrate the industry and off-industry work together, so that the industry and outside work groups can be carried out simultaneously. Due to the limitations of technology, professional ability and other aspects, some surveying and mapping personnel can not quickly master the application skills of digital mapping software, can not control the quality scientifically, so in the future work period to strengthen the attention to these two aspects.
文摘A software for the management of computer aided design（CAD） drawings was developed. It can be used to classify and register information including geometric features of the drawings, and to search appropriate reference drawings matching the given conditions of a new design. The thumbnails of the drawings can be displayed in an order of preference and can be used to zoom and access the PDF file or CAD data of a selected drawing. The thumbnails and the data structure are two key elements of the software.
基金This project was part financially supported by Natural Science Researching Project for Jiangsu Universities (03KJB510130, 05KJD510177 and NSFC.60572075).
文摘Some structures of digital quadrature AD conversion for soft-ware-defined radio （SDR） systems are studied. Their performances and affections on the SDR systems are also analyzed. Two generalized quadrature AD schemes are proposed. In one of them, the AD sampling speed can be reduced by 2 times; and in the other both the output data rate of every channel and AD sampling speed can be lowered by paralleling the digital quadrature filtering structure. These structures can be also easily implemented into modules, and the polyphase filters can be flexibly realized by VHDL language based one chip of FPGA. To assess the proposed schemes, their applications to a particular ultra wideband （UWB） demonstrative receiver system are introduced. Some experimental results are also given. It is shown that the generalized quadrature AD structures are reliable and feasible for its module design, and performances are improved obviously for its better performance to price ratio.
基金supported by the State Grid Corporation of China‘s project:Research on artificial intelligence analysis technology of available transmission capacity(ATC)of key section under multiple power grid operation modes(5100-202255020A-1-1-ZN).
文摘Power grid simulation calculation iswidely used in fields such as power grid operation,planning,safety defense,and accident inversion,which is one of the fundamental support technologies for power grid operation.At present,mainstream software for power grid simulation calculation used by domestic power grid enterprises include PSD Power Tools,Power System Analysis Software Package(PSASP),Advanced Digital Power System Simulator(ADPSS)and so on,which can provide various simulation calculation functions such as power flow calculation,transient stability calculation,short circuit current calculation,etc.But in the process of using these software,various calculation data adjustments still rely entirely on manual experience.This article introduces artificial intelligence technology into power grid simulation calculation and develops an intelligent power system analysis platform which can be used in the simulation for large power grids,achieving the combination of artificial intelligence technology and power grid simulation technology,which can provide technical support for the transformation of power grid simulation and analysis work mode.
