We propose and demonstrate an optical implementation of a quantum key distribution protocol, which uses three-non-orthogonal states and six states in total. The proposed scheme improves the protocol that is proposed b...We propose and demonstrate an optical implementation of a quantum key distribution protocol, which uses three-non-orthogonal states and six states in total. The proposed scheme improves the protocol that is proposed by Phoenix, Barnett and Chefles [J. Mod. Opt. 47, 507 (2000)]. An additional feature, which we introduce in our scheme, is that we add another detection set;where each detection set has three non-orthogonal states. The inclusion of an additional detection set leads to improved symmetry, increased eavesdropper detection and higher security margin for our protocol.展开更多
We investigate the effect of collective-rotation noise on the security of the six-state quantum key distribution. We study the case where the eavesdropper, Eve, performs an intercept-resend attack on the quantum commu...We investigate the effect of collective-rotation noise on the security of the six-state quantum key distribution. We study the case where the eavesdropper, Eve, performs an intercept-resend attack on the quantum communication between Alice, the sender, and Bob, the receiver. We first derive the collective-rotation noise model for the six-state protocol and then parameterize the mutual information between Alice and Eve. We then derive quantum bit error rate for three interceptresend attack scenarios. We observe that the six-state protocol is robust against intercept-resend attacks on collective rotation noise channels when the rotation angle is kept within certain bounds.展开更多
目的:探究六步行为认知法对先天性外中耳畸形修复患儿负性情绪及应对方式的影响。方法:选取2021年1月-2023年1月笔者医院进行先天性外中耳畸形修复的98例患儿为研究对象,根据随机数字表法分为研究组(n=49)和对照组(n=49)。研究组围术期...目的:探究六步行为认知法对先天性外中耳畸形修复患儿负性情绪及应对方式的影响。方法:选取2021年1月-2023年1月笔者医院进行先天性外中耳畸形修复的98例患儿为研究对象,根据随机数字表法分为研究组(n=49)和对照组(n=49)。研究组围术期实施六步行为认知法干预,对照组实施常规护理干预。比较干预前后两组患儿焦虑状态[改良版耶鲁围手术期焦虑量表(The modified yale preoperative anxiety scale,mYPAS)]、应对方式[慢性病儿童应对方式量表(Coping with a disease,CODI)]、自信心评分(儿童自信心评定量表)、护理满意度及并发症情况变化。结果:干预实施后,两组患儿各指标均有改善,且研究组mYPAS评分低于对照组,CODI评分优于对照组,儿童自信心评分高于对照组,护理满意度也高于对照组,差异均有统计学意义(P<0.05)。结论:六步行为认知法有利于改善先天性外中耳畸形修复患儿焦虑状态,增强患儿自信心,提高积极应对方式与护理满意度,减少并发症。展开更多
传统永磁无刷直流电机(brushless direct current motor,BLDCM)无法控制永磁磁通量及永磁体固有缺陷,限制了其在许多高科技领域中的应用。该文提出新型双凸极无永磁BLDCM。突破传统结构原理,用轴向线圈磁场辅助径向定子励磁,取消永磁材...传统永磁无刷直流电机(brushless direct current motor,BLDCM)无法控制永磁磁通量及永磁体固有缺陷,限制了其在许多高科技领域中的应用。该文提出新型双凸极无永磁BLDCM。突破传统结构原理,用轴向线圈磁场辅助径向定子励磁,取消永磁材料特性制约。线圈辅助定子励磁电机更高输出转矩特性可通过提高气隙磁通及电枢绕组的电流实现。用有限元软件进行数值分析并验证其准确性和有效性;基于该电机的特殊结构和电感模型,搭建联合仿真模型,用三相六状态角度导通方式,增加输出转矩,减小转矩脉动;根据辅助励磁线圈调磁特性,进行励磁线圈和电枢绕组混合之励磁电流-转矩控制。实验验证新型结构电机样机及控制方法的可行性和有效性。展开更多
文摘We propose and demonstrate an optical implementation of a quantum key distribution protocol, which uses three-non-orthogonal states and six states in total. The proposed scheme improves the protocol that is proposed by Phoenix, Barnett and Chefles [J. Mod. Opt. 47, 507 (2000)]. An additional feature, which we introduce in our scheme, is that we add another detection set;where each detection set has three non-orthogonal states. The inclusion of an additional detection set leads to improved symmetry, increased eavesdropper detection and higher security margin for our protocol.
基金Project supported by the South African Research Chair Initiative of the Department of Science and Technology and National Research Foundation
文摘We investigate the effect of collective-rotation noise on the security of the six-state quantum key distribution. We study the case where the eavesdropper, Eve, performs an intercept-resend attack on the quantum communication between Alice, the sender, and Bob, the receiver. We first derive the collective-rotation noise model for the six-state protocol and then parameterize the mutual information between Alice and Eve. We then derive quantum bit error rate for three interceptresend attack scenarios. We observe that the six-state protocol is robust against intercept-resend attacks on collective rotation noise channels when the rotation angle is kept within certain bounds.
文摘目的:探究六步行为认知法对先天性外中耳畸形修复患儿负性情绪及应对方式的影响。方法:选取2021年1月-2023年1月笔者医院进行先天性外中耳畸形修复的98例患儿为研究对象,根据随机数字表法分为研究组(n=49)和对照组(n=49)。研究组围术期实施六步行为认知法干预,对照组实施常规护理干预。比较干预前后两组患儿焦虑状态[改良版耶鲁围手术期焦虑量表(The modified yale preoperative anxiety scale,mYPAS)]、应对方式[慢性病儿童应对方式量表(Coping with a disease,CODI)]、自信心评分(儿童自信心评定量表)、护理满意度及并发症情况变化。结果:干预实施后,两组患儿各指标均有改善,且研究组mYPAS评分低于对照组,CODI评分优于对照组,儿童自信心评分高于对照组,护理满意度也高于对照组,差异均有统计学意义(P<0.05)。结论:六步行为认知法有利于改善先天性外中耳畸形修复患儿焦虑状态,增强患儿自信心,提高积极应对方式与护理满意度,减少并发症。
基金Supported by The National Natural Science Foundation of China(No.60807014)the Natural Science Foundation of Jiangxi Province,China(No.2009GZW0005)the Research Foundation of State Key Laboratory of Advanced Optical Communication Systems and Networks,and the Research Foundation of the Education Depart ment of Jiangxi Province,China(No.GJJ09153)
文摘传统永磁无刷直流电机(brushless direct current motor,BLDCM)无法控制永磁磁通量及永磁体固有缺陷,限制了其在许多高科技领域中的应用。该文提出新型双凸极无永磁BLDCM。突破传统结构原理,用轴向线圈磁场辅助径向定子励磁,取消永磁材料特性制约。线圈辅助定子励磁电机更高输出转矩特性可通过提高气隙磁通及电枢绕组的电流实现。用有限元软件进行数值分析并验证其准确性和有效性;基于该电机的特殊结构和电感模型,搭建联合仿真模型,用三相六状态角度导通方式,增加输出转矩,减小转矩脉动;根据辅助励磁线圈调磁特性,进行励磁线圈和电枢绕组混合之励磁电流-转矩控制。实验验证新型结构电机样机及控制方法的可行性和有效性。
