The key technology of semi-continuous conveyor system decides the successful using of this system. The key technology includes optimal initial building depth of this system,the crusher moving step and the layout of co...The key technology of semi-continuous conveyor system decides the successful using of this system. The key technology includes optimal initial building depth of this system,the crusher moving step and the layout of conveyor system are studied, and their calculating models are built up.展开更多
In order to develop green good, reduce the use of chemical fertilizer and pesticide, realize ＂double reduction＂ and synergism, improve safety and quality of products, protect the ecological environment and promote t...In order to develop green good, reduce the use of chemical fertilizer and pesticide, realize ＂double reduction＂ and synergism, improve safety and quality of products, protect the ecological environment and promote the healthy and steady development of strawberry industry, the goals and key technology of fertilizer-pesticide ＂double reduction＂ and synergism for greenhouse strawberry are summed up in this paper targeting at the current situation of strawberry production and combined with the new technology achievements at home and abroad. The key technology includes six items： healthy seedling cultivating technique, soil improvement and continuous cropping obstacle treatment technique, agricultural ecological prevention tech- nique, physicochemical trap of pest control technique, biological control technique and low residual risk chemical control technique.展开更多
To understand the resource features and geology in the deep Jinchuan nickel deposit, difficult geological conditions were systematically analyzed, including high stress, fragmentized ore rock, prevalent deformation, d...To understand the resource features and geology in the deep Jinchuan nickel deposit, difficult geological conditions were systematically analyzed, including high stress, fragmentized ore rock, prevalent deformation, difficult tunnel support, complicated rock mechanics, and low mining recovery. An integrated technology package was built for safe, efficient, and continuous mining in a deep, massive, and complex nickel and cobalt mine. This was done by the invention of a large-area continuous mining method with honeycomb drives; the establishment of ground control theory and a technology package for high-stress and fragmented ore rock： and the development of a new type of backfilling cement material, along with a deep backfilling technology that comprises the pipeline transport of high-density slurry with coarse aggregates. In this way, good solutions to existing problems were found to permit the efficient exploitation and comprehensive utilization of the resources in the deep Jinchuan nickel mine. In addition, a technological demonstration in an underground mine was performed using the cemented undercut-and-fill mining method for stressful, frag- mented, and rheological rock.展开更多
A new business management mode-agile & convenient management mode (ACM) was proposed because of large scale mobile computing and mobile business. As an efficient approach to ACM, Mobile ERP (MERP), including its c...A new business management mode-agile & convenient management mode (ACM) was proposed because of large scale mobile computing and mobile business. As an efficient approach to ACM, Mobile ERP (MERP), including its concept and four-tier architecture was introduced firstly. Then, the two key technologies of implementing MERP about message service and wireless WAP service were developed. Meanwhile, an official MERP system was also implemented based on our CERP software system by aglets. And it was applied by Henan Tongli Cement Group in China. In comparison with the traditional ERP system, the new system could improve the efficiency and level of management, and reduce the management cost of enterprise.展开更多
Sutong Bridge is a cable-stayed bridge across Yangtze River with the main span of 1 088 m. This article outlines technical challenges,key technology and innovation in the design and construction such as scour protecti...Sutong Bridge is a cable-stayed bridge across Yangtze River with the main span of 1 088 m. This article outlines technical challenges,key technology and innovation in the design and construction such as scour protection,lowering steel cofferdam,construction platform establishment,construction and control of pylons,fabrication and damping of long cables,erection and control of steel box girders.展开更多
There are abundant tight sandstone gas resources in the Sichuan Basin,which are the important objects of reserve and production increase and large-scale development.Due to their discontinuous sandbody distribution,nar...There are abundant tight sandstone gas resources in the Sichuan Basin,which are the important objects of reserve and production increase and large-scale development.Due to their discontinuous sandbody distribution,narrow channels,and strong horizontal and vertical heteroge-neity,however,conventional fracturing technologies cannot achieve the ideal stimulation effect here.In order to address this difficulty,this paper dissects the geology engineering characteristics of tight sandstone gas reservoirs in the western Sichuan Basin.Starting from the seepage mechanics theory,the concept of“multi-scale high-density”tight gas fracturing technology is put forward by fully referring to the experience of previous multi-round reservoir stimulation in the western Sichuan Basin and the idea of unconventional volume fracturing technology.In addition,its conceptual connotation,key technologies and implementation effects are illustrated.The following research results are obtained.First,the seepage characteristics make it necessary for the efficient production of tight gas reserves to increase fracture density and stimulated reservoir volume(SRV).Second,the“multi-scale high-density”fracturing technology emphasizes the rationality of high-density hydraulic fracture creation and the matching of multi-scale fractureflow capacity,and aims at establishing a multi-level fracture system with effective and steady gasflow in tight reservoirs through fracturing.Third,the“wide,dense,support,stable,and precise”fracturing technology is applied to improve single well production and estimated ultimate recovery(EUR).Fourth,the engineering practice of“multi-scale high-density”fracturing technology in the tight reservoirs of Jurassic Shaximiao Formation and Triassic Xujiahe Formation in the ZJ Gas Field realizes the average single well production rate of 15.6104 m3/d,which is 1.96 times higher than that before the stimulation.Obviously,it provides powerful support for the operation of the ZJ Gas Field into a giant gasfield with the reserves of 100 billion cubic meters.In conclusion,the formation of the concept and key technologies of“multi-scale high-density”fracturing technology effectively supports the efficient development of tight gas in the western Sichuan Basin and points out the following research direction of tight gas reservoir stimulation.The research results provide reference and guidance for the large-scale benefit development of tight gas in China.展开更多
In the construction process of highway and bridge engineering, it is necessary to conduct a comprehensive survey of the terrain, geology, hydrology and other conditions of the area where the project is located in the ...In the construction process of highway and bridge engineering, it is necessary to conduct a comprehensive survey of the terrain, geology, hydrology and other conditions of the area where the project is located in the early stage of the design, and carry out detailed measurement and lofting of the project during the construction process, which is the engineering design Provide accurate basic data guidance with construction and realize dynamic monitoring of construction links. Therefore, surveying, surveying and mapping work is an indispensable key link in the construction of highway and bridge engineering. Whether its technology is applicable or not, and whether the measurement methods and methods are standardized or not directly affect the accuracy of the measurement and the result of the calculation. It greatly affects the progress, quality and implementation cost of project construction. Therefore, promoting the optimization of measurement technology and strengthening the supervision of measurement work have become an important content of project construction work.展开更多
In recent decades of China's rapid economic development, the construction industry has also experienced a golden period of development, and has made very brilliant achievements. However, we must also see that the ...In recent decades of China's rapid economic development, the construction industry has also experienced a golden period of development, and has made very brilliant achievements. However, we must also see that the development of the traditional construction industry has caused great damage to the environment and excessive consumption of resources. With the development of the concept of energy conservation in the building industry, which has become an inevitable trend.展开更多
At present, with the rapid development of science and technology, based on the requirements of weapon test and identification tasks, the experimental data acquisition and processing space station, which is suitable fo...At present, with the rapid development of science and technology, based on the requirements of weapon test and identification tasks, the experimental data acquisition and processing space station, which is suitable for a variety of extreme natural environments such as alpine, plateau, mountain, jungle, desert, island and reef, has been studied theoretically and in practice. The space station is a dome-shaped structure with scale-shaped modules and basalt reinforced fiber composite materials, providing thermal insulation, ventilation and continuous power supply. It can provide support and guarantee for the real-time monitoring, recovery and information transmission of test data, and meet the basic work and life needs of test personnel.展开更多
On October 14, two satellites SJ-9A/B were sent into their preset orbits by a LM-2C/SMA launch vehicle, which is the first flight of a series of China's civilian technology experimental satellites. SJ-9A and B are...On October 14, two satellites SJ-9A/B were sent into their preset orbits by a LM-2C/SMA launch vehicle, which is the first flight of a series of China's civilian technology experimental satellites. SJ-9A and B are the first two satellites in the series of civilian technology experimental satellites designed for tests such as long lifetime and high reliability, high precision and high performance of satellite, domestically developed core components, satellite formation展开更多
With the development of science and technology, the construction of smart grid is the trend of development. Intelligent substation plays a key role in the construction of intelligent network. Therefore, this paper dis...With the development of science and technology, the construction of smart grid is the trend of development. Intelligent substation plays a key role in the construction of intelligent network. Therefore, this paper discusses the technology and construction of intelligent substation.展开更多
Chemical production has the characteristics of complexity, great difficulty, accurate technical requirements and high risk. The application of intelligent control technology and instrument control to chemical producti...Chemical production has the characteristics of complexity, great difficulty, accurate technical requirements and high risk. The application of intelligent control technology and instrument control to chemical production can reduce the demand for manual operation, improve the accuracy of chemical production and promote the benign operation of chemical operation. Therefore, the key technologies of intelligent control and instrument control should be deeply analyzed. In order to seek better chemical production technology and control scheme and promote the development of chemical industry.展开更多
At present, with the continuous development and progress of intelligent technology and computer technology, the requirements for welding products in the market are gradually improved. Therefore, in order to ensure the...At present, with the continuous development and progress of intelligent technology and computer technology, the requirements for welding products in the market are gradually improved. Therefore, in order to ensure the quality and efficiency of welding products, welding robots can be applied in welding work. At present, welding robots have been widely used in the field of welding. Through the use of welding robot, the quality and efficiency of welding production can be improved to a certain extent, the working conditions of operators can be effectively improved, and the product quality can be effectively guaranteed, so as to ensure the product quality. Differentiated manufacturing also plays a role in promoting the modernization and transformation of related industries. Welding robot uses robot instead of manual operation, which involves using welding robot to complete welding work. According to the different welding methods used by welding robots, welding robots can be divided into welding robots, arc welding robots, laser welding robots and friction robots. Welding robot and other types, with the development of automation technology, welding robot can be divided into intelligent robot and teaching breeding robot.展开更多
The breakthrough of key core technology is a theoretical and practical strategic issue to realize the rise of the country.This paper analyzes the concept of key core technology and its breakthrough and analyzes its ch...The breakthrough of key core technology is a theoretical and practical strategic issue to realize the rise of the country.This paper analyzes the concept of key core technology and its breakthrough and analyzes its characteristics.Based on the perspective of participants,this paper summarizes the influencing factors of key core technology breakthroughs in enterprises:internal and external enterprises,universities and scientific research institutions,and government.This paper expands the relevant research on key core technology breakthroughs and provides inspiration for enterprises to carry out key core technology research and breakthrough practices.展开更多
OCDMA's network application on LAN, metro-ring and backbone networks are discussed. Its simple tell-go protocol makes it a powerful competitor with CSMA/CD in optical LANs. Its large soft capacity could erase the ...OCDMA's network application on LAN, metro-ring and backbone networks are discussed. Its simple tell-go protocol makes it a powerful competitor with CSMA/CD in optical LANs. Its large soft capacity could erase the wavelength routing algorithm of WDM based metro-ring. And its content susceptibility could be largely used in label switching backbone network. And why should be 2D CODEC as well as interference cancellation is although mentioned as OCDMA key technology.展开更多
This project is supported by the 2007 R ＆ D Special Fund for Public Welfare by Ministry of Science and Technology and Ministry of Finance.Research tasks in this project are proposed based on the implementation plan o...This project is supported by the 2007 R ＆ D Special Fund for Public Welfare by Ministry of Science and Technology and Ministry of Finance.Research tasks in this project are proposed based on the implementation plan of the＂THORPEX（The Observing System Research and Predictability Experiment） Interactive Grand Global Ensemble（TIGGE）＂,a sub-project of the THORPEX international program.展开更多
By studying the traditional spectral reflectance reconstruction method, spectral reflectance and the relative spectral power distribution of a lighting source are sparsely decomposed, and the orthogonal property of th...By studying the traditional spectral reflectance reconstruction method, spectral reflectance and the relative spectral power distribution of a lighting source are sparsely decomposed, and the orthogonal property of the principal component orthogonal basis is used to eliminate basis; then spectral reflectance data are obtained by solving a sparse coefficient. After theoretical analysis, the spectral reflectance reconstruction based on sparse prior knowledge of the principal component orthogonal basis by a single-pixel detector is carried out by software simulation and experiment. It can reduce the complexity and cost of the system, and has certain significance for the improvement of multispectral image acquisition technology.展开更多
Quantum key distribution(QKD) generates information-theoretical secret keys between two parties based on the physical laws of quantum mechanics. Following the advancement in quantum communication networks, it becomes ...Quantum key distribution(QKD) generates information-theoretical secret keys between two parties based on the physical laws of quantum mechanics. Following the advancement in quantum communication networks, it becomes feasible and economical to combine QKD with classical optical communication through the same fiber using dense wavelength division multiplexing(DWDM) technology. This study proposes a detailed scheme of TF-QKD protocol with DWDM technology and analyzes its performance, considering the influence of quantum channel number and adjacent quantum crosstalk on the secret key rates. The simulation results show that the scheme further increases the secret key rate of TF-QKD and its variants. Therefore, this scheme provides a method for improving the secret key rate for practical quantum networks.展开更多
The paper summarizes the development of mobile communication of domestic and foreign railways,and proposes the priorities for tackling key technological problems of railway 5G private network according to the technica...The paper summarizes the development of mobile communication of domestic and foreign railways,and proposes the priorities for tackling key technological problems of railway 5G private network according to the technical routes of railway next-generation mobile communication determined by China State Railway Group Co.,Ltd.From the aspects of work objectives,principles,technical routes and innovative working methods,the paper elaborates the ideas of railway 5G scientific and technological research,puts forward the contents and plans of scientific and technological research on railway 5G private network,systematically organizes the achievements in the scientific and technological research stage of railway 5G private network,and sets forth the key contents of next-step scientific and technological research.展开更多
文摘The key technology of semi-continuous conveyor system decides the successful using of this system. The key technology includes optimal initial building depth of this system,the crusher moving step and the layout of conveyor system are studied, and their calculating models are built up.
基金Supported by Demonstration and Promotion Project of Shanghai Municipal Committee of Agriculture[HNKT(2015)2-7]Jiangsu Agricultural"Three New Engineering"Project[SXGC(2017)208]Jiangsu Agricultural Science and Technology Innovation Fund[CX(15)1029]~~
文摘In order to develop green good, reduce the use of chemical fertilizer and pesticide, realize ＂double reduction＂ and synergism, improve safety and quality of products, protect the ecological environment and promote the healthy and steady development of strawberry industry, the goals and key technology of fertilizer-pesticide ＂double reduction＂ and synergism for greenhouse strawberry are summed up in this paper targeting at the current situation of strawberry production and combined with the new technology achievements at home and abroad. The key technology includes six items： healthy seedling cultivating technique, soil improvement and continuous cropping obstacle treatment technique, agricultural ecological prevention tech- nique, physicochemical trap of pest control technique, biological control technique and low residual risk chemical control technique.
文摘To understand the resource features and geology in the deep Jinchuan nickel deposit, difficult geological conditions were systematically analyzed, including high stress, fragmentized ore rock, prevalent deformation, difficult tunnel support, complicated rock mechanics, and low mining recovery. An integrated technology package was built for safe, efficient, and continuous mining in a deep, massive, and complex nickel and cobalt mine. This was done by the invention of a large-area continuous mining method with honeycomb drives; the establishment of ground control theory and a technology package for high-stress and fragmented ore rock： and the development of a new type of backfilling cement material, along with a deep backfilling technology that comprises the pipeline transport of high-density slurry with coarse aggregates. In this way, good solutions to existing problems were found to permit the efficient exploitation and comprehensive utilization of the resources in the deep Jinchuan nickel mine. In addition, a technological demonstration in an underground mine was performed using the cemented undercut-and-fill mining method for stressful, frag- mented, and rheological rock.
基金Sponsored by the Project Supported by the National High-Technology R&D Program for CIMS of China (Grant No2006AA04Z165)
文摘A new business management mode-agile & convenient management mode (ACM) was proposed because of large scale mobile computing and mobile business. As an efficient approach to ACM, Mobile ERP (MERP), including its concept and four-tier architecture was introduced firstly. Then, the two key technologies of implementing MERP about message service and wireless WAP service were developed. Meanwhile, an official MERP system was also implemented based on our CERP software system by aglets. And it was applied by Henan Tongli Cement Group in China. In comparison with the traditional ERP system, the new system could improve the efficiency and level of management, and reduce the management cost of enterprise.
文摘Sutong Bridge is a cable-stayed bridge across Yangtze River with the main span of 1 088 m. This article outlines technical challenges,key technology and innovation in the design and construction such as scour protection,lowering steel cofferdam,construction platform establishment,construction and control of pylons,fabrication and damping of long cables,erection and control of steel box girders.
基金supported by the key project of the United Foun-dation of National NaturalScience Foundation of China“Basic Research on Volumetric Acid Fracturing of Deep Sulfur-bearing Carbonate Gas Reservoirs in Sichuan Basin”(No.U21A20105)CNPC Science and Technology Innovation Project"Research on the Mechanism of Complex Fracture Propagation and Control Measures of Temporary Plugging Fracturing of Shale Gas Reservoir"(No.2020D-5007-0208).
文摘There are abundant tight sandstone gas resources in the Sichuan Basin,which are the important objects of reserve and production increase and large-scale development.Due to their discontinuous sandbody distribution,narrow channels,and strong horizontal and vertical heteroge-neity,however,conventional fracturing technologies cannot achieve the ideal stimulation effect here.In order to address this difficulty,this paper dissects the geology engineering characteristics of tight sandstone gas reservoirs in the western Sichuan Basin.Starting from the seepage mechanics theory,the concept of“multi-scale high-density”tight gas fracturing technology is put forward by fully referring to the experience of previous multi-round reservoir stimulation in the western Sichuan Basin and the idea of unconventional volume fracturing technology.In addition,its conceptual connotation,key technologies and implementation effects are illustrated.The following research results are obtained.First,the seepage characteristics make it necessary for the efficient production of tight gas reserves to increase fracture density and stimulated reservoir volume(SRV).Second,the“multi-scale high-density”fracturing technology emphasizes the rationality of high-density hydraulic fracture creation and the matching of multi-scale fractureflow capacity,and aims at establishing a multi-level fracture system with effective and steady gasflow in tight reservoirs through fracturing.Third,the“wide,dense,support,stable,and precise”fracturing technology is applied to improve single well production and estimated ultimate recovery(EUR).Fourth,the engineering practice of“multi-scale high-density”fracturing technology in the tight reservoirs of Jurassic Shaximiao Formation and Triassic Xujiahe Formation in the ZJ Gas Field realizes the average single well production rate of 15.6104 m3/d,which is 1.96 times higher than that before the stimulation.Obviously,it provides powerful support for the operation of the ZJ Gas Field into a giant gasfield with the reserves of 100 billion cubic meters.In conclusion,the formation of the concept and key technologies of“multi-scale high-density”fracturing technology effectively supports the efficient development of tight gas in the western Sichuan Basin and points out the following research direction of tight gas reservoir stimulation.The research results provide reference and guidance for the large-scale benefit development of tight gas in China.
文摘In the construction process of highway and bridge engineering, it is necessary to conduct a comprehensive survey of the terrain, geology, hydrology and other conditions of the area where the project is located in the early stage of the design, and carry out detailed measurement and lofting of the project during the construction process, which is the engineering design Provide accurate basic data guidance with construction and realize dynamic monitoring of construction links. Therefore, surveying, surveying and mapping work is an indispensable key link in the construction of highway and bridge engineering. Whether its technology is applicable or not, and whether the measurement methods and methods are standardized or not directly affect the accuracy of the measurement and the result of the calculation. It greatly affects the progress, quality and implementation cost of project construction. Therefore, promoting the optimization of measurement technology and strengthening the supervision of measurement work have become an important content of project construction work.
文摘In recent decades of China's rapid economic development, the construction industry has also experienced a golden period of development, and has made very brilliant achievements. However, we must also see that the development of the traditional construction industry has caused great damage to the environment and excessive consumption of resources. With the development of the concept of energy conservation in the building industry, which has become an inevitable trend.
文摘At present, with the rapid development of science and technology, based on the requirements of weapon test and identification tasks, the experimental data acquisition and processing space station, which is suitable for a variety of extreme natural environments such as alpine, plateau, mountain, jungle, desert, island and reef, has been studied theoretically and in practice. The space station is a dome-shaped structure with scale-shaped modules and basalt reinforced fiber composite materials, providing thermal insulation, ventilation and continuous power supply. It can provide support and guarantee for the real-time monitoring, recovery and information transmission of test data, and meet the basic work and life needs of test personnel.
文摘On October 14, two satellites SJ-9A/B were sent into their preset orbits by a LM-2C/SMA launch vehicle, which is the first flight of a series of China's civilian technology experimental satellites. SJ-9A and B are the first two satellites in the series of civilian technology experimental satellites designed for tests such as long lifetime and high reliability, high precision and high performance of satellite, domestically developed core components, satellite formation
文摘With the development of science and technology, the construction of smart grid is the trend of development. Intelligent substation plays a key role in the construction of intelligent network. Therefore, this paper discusses the technology and construction of intelligent substation.
文摘Chemical production has the characteristics of complexity, great difficulty, accurate technical requirements and high risk. The application of intelligent control technology and instrument control to chemical production can reduce the demand for manual operation, improve the accuracy of chemical production and promote the benign operation of chemical operation. Therefore, the key technologies of intelligent control and instrument control should be deeply analyzed. In order to seek better chemical production technology and control scheme and promote the development of chemical industry.
文摘At present, with the continuous development and progress of intelligent technology and computer technology, the requirements for welding products in the market are gradually improved. Therefore, in order to ensure the quality and efficiency of welding products, welding robots can be applied in welding work. At present, welding robots have been widely used in the field of welding. Through the use of welding robot, the quality and efficiency of welding production can be improved to a certain extent, the working conditions of operators can be effectively improved, and the product quality can be effectively guaranteed, so as to ensure the product quality. Differentiated manufacturing also plays a role in promoting the modernization and transformation of related industries. Welding robot uses robot instead of manual operation, which involves using welding robot to complete welding work. According to the different welding methods used by welding robots, welding robots can be divided into welding robots, arc welding robots, laser welding robots and friction robots. Welding robot and other types, with the development of automation technology, welding robot can be divided into intelligent robot and teaching breeding robot.
文摘The breakthrough of key core technology is a theoretical and practical strategic issue to realize the rise of the country.This paper analyzes the concept of key core technology and its breakthrough and analyzes its characteristics.Based on the perspective of participants,this paper summarizes the influencing factors of key core technology breakthroughs in enterprises:internal and external enterprises,universities and scientific research institutions,and government.This paper expands the relevant research on key core technology breakthroughs and provides inspiration for enterprises to carry out key core technology research and breakthrough practices.
基金The research is supported by NSF projects No.60132040 and No.69982006
文摘OCDMA's network application on LAN, metro-ring and backbone networks are discussed. Its simple tell-go protocol makes it a powerful competitor with CSMA/CD in optical LANs. Its large soft capacity could erase the wavelength routing algorithm of WDM based metro-ring. And its content susceptibility could be largely used in label switching backbone network. And why should be 2D CODEC as well as interference cancellation is although mentioned as OCDMA key technology.
文摘This project is supported by the 2007 R ＆ D Special Fund for Public Welfare by Ministry of Science and Technology and Ministry of Finance.Research tasks in this project are proposed based on the implementation plan of the＂THORPEX（The Observing System Research and Predictability Experiment） Interactive Grand Global Ensemble（TIGGE）＂,a sub-project of the THORPEX international program.
基金supported by the National Natural Science Foundation of China (Grant No.61405115)the Natural Science Foundation of Shanghai (Grant No.14ZR1428400)+1 种基金the Innovation Project of Shanghai Municipal Education Commission (Grant No.14YZ099)National Basic Research Program of China (973 Program) (Grant No.2015CB352004)
文摘By studying the traditional spectral reflectance reconstruction method, spectral reflectance and the relative spectral power distribution of a lighting source are sparsely decomposed, and the orthogonal property of the principal component orthogonal basis is used to eliminate basis; then spectral reflectance data are obtained by solving a sparse coefficient. After theoretical analysis, the spectral reflectance reconstruction based on sparse prior knowledge of the principal component orthogonal basis by a single-pixel detector is carried out by software simulation and experiment. It can reduce the complexity and cost of the system, and has certain significance for the improvement of multispectral image acquisition technology.
基金supported by the State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications (Grant No. IPOC2021ZT10)the National Natural Science Foundation of China (Grant No. 11904333)+1 种基金the Fundamental Research Funds for the Central Universities (Grant No. 2019XD-A02)BUPT Innovation and Entrepreneurship Support Program (Grant No. 2022YC-T051)。
文摘Quantum key distribution(QKD) generates information-theoretical secret keys between two parties based on the physical laws of quantum mechanics. Following the advancement in quantum communication networks, it becomes feasible and economical to combine QKD with classical optical communication through the same fiber using dense wavelength division multiplexing(DWDM) technology. This study proposes a detailed scheme of TF-QKD protocol with DWDM technology and analyzes its performance, considering the influence of quantum channel number and adjacent quantum crosstalk on the secret key rates. The simulation results show that the scheme further increases the secret key rate of TF-QKD and its variants. Therefore, this scheme provides a method for improving the secret key rate for practical quantum networks.
文摘The paper summarizes the development of mobile communication of domestic and foreign railways,and proposes the priorities for tackling key technological problems of railway 5G private network according to the technical routes of railway next-generation mobile communication determined by China State Railway Group Co.,Ltd.From the aspects of work objectives,principles,technical routes and innovative working methods,the paper elaborates the ideas of railway 5G scientific and technological research,puts forward the contents and plans of scientific and technological research on railway 5G private network,systematically organizes the achievements in the scientific and technological research stage of railway 5G private network,and sets forth the key contents of next-step scientific and technological research.
