The incentive mechanism of competition for growth often produces locally oriented innovation policies,creating asymmetric competition with countries that pursue strategically coordinated innovation.As a result,innovat...The incentive mechanism of competition for growth often produces locally oriented innovation policies,creating asymmetric competition with countries that pursue strategically coordinated innovation.As a result,innovation in core technologies in key fields within China's manufacturing sector remains confined to low-end segments and struggles to achieve breakthroughs.This study takes the development of a unified national market--aimed at optimizing resource allocation and mitigating regional market segmentation-as its starting point,and constructs a Footloose Entrepreneur model that incorporates the criticality of technology.Our theoretical derivation and numerical simulations yield two conclusions.First,the development of a unified national market can effectively promote regional innovation in core technologies in key fields.Second,this effort requires sound government guidance.Otherwise,non-benign interregional market barriers may lead to the agglomeration of high-end factors,thereby impeding the spillover of innovation to surrounding regions.展开更多
This paper presents a multivariate public key cryptographic scheme over a finite field with odd prime characteristic.The idea of embedding and layering is manifested in its construction.The security of the scheme is a...This paper presents a multivariate public key cryptographic scheme over a finite field with odd prime characteristic.The idea of embedding and layering is manifested in its construction.The security of the scheme is analyzed in detail,and this paper indicates that the scheme can withstand the up to date differential cryptanalysis.We give heuristic arguments to show that this scheme resists all known attacks.展开更多
We develop a quantum key distribution (QKD) system with fast active optical path length compensation. A rapid and reliable active optical path length compensation scheme is proposed and applied to a plug-and-play QKD ...We develop a quantum key distribution (QKD) system with fast active optical path length compensation. A rapid and reliable active optical path length compensation scheme is proposed and applied to a plug-and-play QKD system. The system monitors changes in key rates and controls it is own operation automatically. The system achieves its optimal performance within three seconds of operation, which includes a sifted key rate of 5.5 kbps and a quantum bit error rate of less than 2% after an abrupt temperature variation along the 25 km quantum channel. The system also operates well over a 24 h period while completing more than 60 active optical path length compensations.展开更多
基金Major Project of the National Social Science Fund of China titled"Mechanisms,Paths,and Policies for China's Deep Participation in Global Innovation Chains Governance"(No.20&ZD123)general project of the National Natural Science Foundation of China titled"Research on Core Technology Innovation Breakthrough in Key Fields and Implementation Path in China's Manufacturing Industry"(No.72073061)project under the 2023 Postgraduate Research&Practice Innovation Program of Jiangsu Province titled"Research on Innovation in Core Technologies in Key Fields Empowered by Digital Infrastructure in Jiangsu Province"(No.KYCX23_0010).
文摘The incentive mechanism of competition for growth often produces locally oriented innovation policies,creating asymmetric competition with countries that pursue strategically coordinated innovation.As a result,innovation in core technologies in key fields within China's manufacturing sector remains confined to low-end segments and struggles to achieve breakthroughs.This study takes the development of a unified national market--aimed at optimizing resource allocation and mitigating regional market segmentation-as its starting point,and constructs a Footloose Entrepreneur model that incorporates the criticality of technology.Our theoretical derivation and numerical simulations yield two conclusions.First,the development of a unified national market can effectively promote regional innovation in core technologies in key fields.Second,this effort requires sound government guidance.Otherwise,non-benign interregional market barriers may lead to the agglomeration of high-end factors,thereby impeding the spillover of innovation to surrounding regions.
基金ACKNOWLEDGEMENT This work is supported by the National Natural Science Foundation of China under Grant No.61103210, the Mathematical Tianyuan Foundation of China under Grant No.11226274, the Fundamental Research Funds for the Central Universities： DKYPO 201301, 2014 XSYJ09, YZDJ1102 and YZDJ1103, the Fund of Beijing Electronic Science and Technology Institute： 2014 TD2OHW, and the Fund of BESTI Information Security Key Laboratory： YQNJ1005.
文摘This paper presents a multivariate public key cryptographic scheme over a finite field with odd prime characteristic.The idea of embedding and layering is manifested in its construction.The security of the scheme is analyzed in detail,and this paper indicates that the scheme can withstand the up to date differential cryptanalysis.We give heuristic arguments to show that this scheme resists all known attacks.
基金was supported by the ICT R&D programs of Ministry of Science, ICT and Future Planning/Institute for Information & Communications Technology Promotion (Grant No. B0101-16-1355)the Korea Institute of Science and Technology research program (Grant No. 2E27231)Korea Institute of Science and Technology-Electronics And Telecommunications Research Institute research program (Grant No. 2V05340)
文摘We develop a quantum key distribution (QKD) system with fast active optical path length compensation. A rapid and reliable active optical path length compensation scheme is proposed and applied to a plug-and-play QKD system. The system monitors changes in key rates and controls it is own operation automatically. The system achieves its optimal performance within three seconds of operation, which includes a sifted key rate of 5.5 kbps and a quantum bit error rate of less than 2% after an abrupt temperature variation along the 25 km quantum channel. The system also operates well over a 24 h period while completing more than 60 active optical path length compensations.
