Einstein–Podolsky–Rosen(EPR) steering is an example of nontrivial quantum nonlocality and characteristic in the non-classical world.The directivity(or asymmetry) is a fascinating trait of EPR steering,and it is diff...Einstein–Podolsky–Rosen(EPR) steering is an example of nontrivial quantum nonlocality and characteristic in the non-classical world.The directivity(or asymmetry) is a fascinating trait of EPR steering,and it is different from other quantum nonlocalities.Here,we consider the strategy in which two atoms compose a two-qubit X state,and the two atoms are owned by Alice and Bob,respectively.The atom of Alice suffers from a reservoir,and the atom of Bob couples with a bit flip channel.The influences of auxiliary qubits on EPR steering and its directions are revealed by means of the entropy uncertainty relation.The results indicate that EPR steering declines with growing time t when adding fewer auxiliary qubits.The EPR steering behaves as damped oscillation when introducing more auxiliary qubits in the strong coupling regime.In the weak coupling regime,the EPR steering monotonously decreases as t increases when coupling auxiliary qubits.The increases in auxiliary qubits are responsible for the fact that the steerability from Alice to Bob(or from Bob to Alice) can be more effectively revealed.Notably,the introductions of more auxiliary qubits can change the situation that steerability from Alice to Bob is certain to a situation in which steerability from Bob to Alice is certain.展开更多
Agricultural pollution has become the dominant source of water pollution in China and the carbon reduction in agricultural aspect is pressing.Based on list analysis method,the COD,TN and TP in agriculture in 28 provin...Agricultural pollution has become the dominant source of water pollution in China and the carbon reduction in agricultural aspect is pressing.Based on list analysis method,the COD,TN and TP in agriculture in 28 provinces in China from 1995 to 2010 were evaluated and compared.By dint of directional distance function,the economics mechanism to reduce carbon emission was discussed.The reduction efficiency and potential of three kinds of pollutants were estimated.The regression indicates that the educational degree,income level and work play a crucial role in carbon emission.展开更多
The choice of fulcrums for control of socio-economic systems represented by direc ted weighted signed graphs is a topic of current interest.This article proposes a new method for identifying nodes of impact and influe...The choice of fulcrums for control of socio-economic systems represented by direc ted weighted signed graphs is a topic of current interest.This article proposes a new method for identifying nodes of impact and influential nodes,which will provide a guaranteed positive system response over the growth model.The task is posed as an optimization problem to maximize the ratio of the norms of the accumulated increments of the growth vector and the exogenous impact vector.The algorithm is reduced to solving a quadratic programming problem with nonlinear restrictions.The selection of the most effective vertices is based on the cumulative gains of the component projections onto the solution vector.Numerical examples arc provided to illustrate the effectiveness of the proposed method.展开更多
目的对脑卒中患者预立医疗照护计划相关文献进行范围审查,分析预立医疗照护计划在脑卒中领域的研究现状。方法以范围综述方法学框架为指导,系统检索PubMed、Embase、Web of Science、Cochrane Library、中国知网、万方数据、维普及中国...目的对脑卒中患者预立医疗照护计划相关文献进行范围审查,分析预立医疗照护计划在脑卒中领域的研究现状。方法以范围综述方法学框架为指导,系统检索PubMed、Embase、Web of Science、Cochrane Library、中国知网、万方数据、维普及中国生物医学文献数据库中的相关文献,检索时限为建库至2023年5月18日。结果共纳入14篇文献。其中9项研究调查了脑卒中患者预立医疗照护计划参与率,5项研究分析了相关影响因素。脑卒中患者预立医疗照护计划参与率较低,主要受人口学因素、疾病相关因素、社会支持及心理相关因素的影响,预立医疗照护计划是否影响临床决策的结论并不一致。结论预立医疗照护计划在脑卒中领域的研究和临床应用未得到重视,需要进一步研究明确影响因素及实施效果。展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.12175001)the Key Project of Natural Science Research of West Anhui University(Grant No.WXZR202311)+7 种基金the Natural Science Research Key Project of Education Department of Anhui Province of China(Grant Nos.KJ2021A0943,2022AH051681,and 2023AH052648)the Open Fund of Anhui Undergrowth Crop Intelligent Equipment Engineering Research Center(Grant No.AUCIEERC-2022-01)Anhui Undergrowth Crop Intelligent Equipment Engineering Research Center(Grant No.2022AH010091)the University Synergy Innovation Program of Anhui Province(Grant No.GXXT-2021-026)the Anhui Provincial Natural Science Foundation(Grant Nos.2108085MA18 and 2008085MA20)Key Project of Program for Excellent Young Talents of Anhui Universities(Grant No.gxyq ZD2019042)the open project of the Key Laboratory of Functional Materials and Devices for Informatics of Anhui Higher Education Institutes(Grant No.FMDI202106)the research start-up funding project of High Level Talent of West Anhui University(Grant No.WGKQ2021048)。
文摘Einstein–Podolsky–Rosen(EPR) steering is an example of nontrivial quantum nonlocality and characteristic in the non-classical world.The directivity(or asymmetry) is a fascinating trait of EPR steering,and it is different from other quantum nonlocalities.Here,we consider the strategy in which two atoms compose a two-qubit X state,and the two atoms are owned by Alice and Bob,respectively.The atom of Alice suffers from a reservoir,and the atom of Bob couples with a bit flip channel.The influences of auxiliary qubits on EPR steering and its directions are revealed by means of the entropy uncertainty relation.The results indicate that EPR steering declines with growing time t when adding fewer auxiliary qubits.The EPR steering behaves as damped oscillation when introducing more auxiliary qubits in the strong coupling regime.In the weak coupling regime,the EPR steering monotonously decreases as t increases when coupling auxiliary qubits.The increases in auxiliary qubits are responsible for the fact that the steerability from Alice to Bob(or from Bob to Alice) can be more effectively revealed.Notably,the introductions of more auxiliary qubits can change the situation that steerability from Alice to Bob is certain to a situation in which steerability from Bob to Alice is certain.
基金Supported by National Natural Science Fundation(71103057)Anhui Natural Science Fundation(11040606Q29)Major Project of National Philosophy and Social Science(08ZD&043)
文摘Agricultural pollution has become the dominant source of water pollution in China and the carbon reduction in agricultural aspect is pressing.Based on list analysis method,the COD,TN and TP in agriculture in 28 provinces in China from 1995 to 2010 were evaluated and compared.By dint of directional distance function,the economics mechanism to reduce carbon emission was discussed.The reduction efficiency and potential of three kinds of pollutants were estimated.The regression indicates that the educational degree,income level and work play a crucial role in carbon emission.
基金supported by the Russian Foundation for Basic Research (No. 17-01-00076)
文摘The choice of fulcrums for control of socio-economic systems represented by direc ted weighted signed graphs is a topic of current interest.This article proposes a new method for identifying nodes of impact and influential nodes,which will provide a guaranteed positive system response over the growth model.The task is posed as an optimization problem to maximize the ratio of the norms of the accumulated increments of the growth vector and the exogenous impact vector.The algorithm is reduced to solving a quadratic programming problem with nonlinear restrictions.The selection of the most effective vertices is based on the cumulative gains of the component projections onto the solution vector.Numerical examples arc provided to illustrate the effectiveness of the proposed method.
文摘目的对脑卒中患者预立医疗照护计划相关文献进行范围审查,分析预立医疗照护计划在脑卒中领域的研究现状。方法以范围综述方法学框架为指导,系统检索PubMed、Embase、Web of Science、Cochrane Library、中国知网、万方数据、维普及中国生物医学文献数据库中的相关文献,检索时限为建库至2023年5月18日。结果共纳入14篇文献。其中9项研究调查了脑卒中患者预立医疗照护计划参与率,5项研究分析了相关影响因素。脑卒中患者预立医疗照护计划参与率较低,主要受人口学因素、疾病相关因素、社会支持及心理相关因素的影响,预立医疗照护计划是否影响临床决策的结论并不一致。结论预立医疗照护计划在脑卒中领域的研究和临床应用未得到重视,需要进一步研究明确影响因素及实施效果。
