In order to improve the control of land use in China,taking Sunan Yugur Autonomous County in the Qilian Mountains area as an example,this paper explores the method of national ecological space delimitation and zoning ...In order to improve the control of land use in China,taking Sunan Yugur Autonomous County in the Qilian Mountains area as an example,this paper explores the method of national ecological space delimitation and zoning based on ARCGIS platform. Three kinds of space division techniques are formed to unify natural resources survey data,carry out land spatial suitability evaluation,delimit three kinds of space and optimize natural ecological space division. According to existing laws in China,based on ecological protection red line,natural ecological space is divided into ecological protection red line and general ecological space. According to the regulation requirements and the functional division of various protected areas,the red line area of ecological protection is divided into core protected area,ecological restoration area,traditional utilization and recreation area with the area of 3 947. 28,3 216. 89 and 6 936. 56 km2,respectively. In view of the prominent problems in the process of delimitation and zoning of natural ecological space,some suggestions are put forward,such as unification of chassis,optimization of ecological protection red line and coordination and unification of management boundary.展开更多
Very recently,Lee et al.proposed a secure quantum teleportation protocol to transfer shared quantum secret between multiple parties in a network[Phys.Rev.Lett.124060501(2020)].This quantum network is encoded with a ma...Very recently,Lee et al.proposed a secure quantum teleportation protocol to transfer shared quantum secret between multiple parties in a network[Phys.Rev.Lett.124060501(2020)].This quantum network is encoded with a maximally entangled GHZ state.In this paper,we consider a partially entangled GHZ state as the entanglement channel,where it can achieve,probabilistically,unity fidelity transfer of the state.Two kinds of strategies are given.One arises when an auxiliary particle is introduced and a general evolution at any receiver's location is then adopted.The other one involves performing a single generalized Bell-state measurement at the location of any sender.This could allow the receivers to recover the transmitted state with a certain probability,in which only the local Pauli operators are performed,instead of introducing an auxiliary particle.In addition,the successful probability is provided,which is determined by the degree of entanglement of the partially multipartite entangled state.Moreover,the proposed protocol is robust against the bit and phase flip noise.展开更多
基金Supported by National Social Science Foundation for Young Projection of China(16CJY012Social Science Foundation for Young Projection of Qinghai University(2018-QSY-4)
文摘In order to improve the control of land use in China,taking Sunan Yugur Autonomous County in the Qilian Mountains area as an example,this paper explores the method of national ecological space delimitation and zoning based on ARCGIS platform. Three kinds of space division techniques are formed to unify natural resources survey data,carry out land spatial suitability evaluation,delimit three kinds of space and optimize natural ecological space division. According to existing laws in China,based on ecological protection red line,natural ecological space is divided into ecological protection red line and general ecological space. According to the regulation requirements and the functional division of various protected areas,the red line area of ecological protection is divided into core protected area,ecological restoration area,traditional utilization and recreation area with the area of 3 947. 28,3 216. 89 and 6 936. 56 km2,respectively. In view of the prominent problems in the process of delimitation and zoning of natural ecological space,some suggestions are put forward,such as unification of chassis,optimization of ecological protection red line and coordination and unification of management boundary.
基金Project supported by the Open Fund of Advanced Cryptography and System Security Key Laboratory of Sichuan Province,China(Grant No.SKLACSS-202108)the Open Research Fund of Key Laboratory of Cryptography of Zhejiang Province,China(Grant No.ZCL21006)+3 种基金the National Natural Science Foundation of China(Grant Nos.U1636106,92046001,61671087,61962009,and 61170272)the BUPT Excellent Ph.D.Students Foundation(Grant No.CX2020310)Natural Science Foundation of Beijing Municipality,China(Grant No.4182006)the Fundamental Research Funds for the Central Universities,China(Grant No.2019XD-A02).
文摘Very recently,Lee et al.proposed a secure quantum teleportation protocol to transfer shared quantum secret between multiple parties in a network[Phys.Rev.Lett.124060501(2020)].This quantum network is encoded with a maximally entangled GHZ state.In this paper,we consider a partially entangled GHZ state as the entanglement channel,where it can achieve,probabilistically,unity fidelity transfer of the state.Two kinds of strategies are given.One arises when an auxiliary particle is introduced and a general evolution at any receiver's location is then adopted.The other one involves performing a single generalized Bell-state measurement at the location of any sender.This could allow the receivers to recover the transmitted state with a certain probability,in which only the local Pauli operators are performed,instead of introducing an auxiliary particle.In addition,the successful probability is provided,which is determined by the degree of entanglement of the partially multipartite entangled state.Moreover,the proposed protocol is robust against the bit and phase flip noise.
