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Security of quantum key distribution with virtual mutually unbiased bases

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 13-21页

作者： Hong-Wei Li chen-Peng Hao zhi-jiang chen Li Gong Yi-Fei Lu Yang Wang Jia-Ji Li Chun-Mei Zhang Rong Wang Zhen-Qiang Yin Qing-Yu Cai Henan Key Laboratory of Quantum Information and Cryptography SSF IEUZhengzhou 450000China Institute of Quantum Information and Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China Department of Physics University of Hong KongHong Kong 999077China Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China School of Information and Communication Engineering Hainan UniversityHaikou 570228China

In a perfect quantum key distribution(QKD)protocol,quantum states should be prepared and measured with mutually unbiased bases(MUBs).However,in a practical QKD system,quantum states are generally prepared and measured with imperfect MUBs using imperfect devices,possibly reducing the secret key rate and transmission *** analyze the security of a QKD system with imperfect MUBs,we propose virtual MUBs to characterize the quantum channel against collective attack,and analyze the corresponding secret key rate under imperfect state preparation and measurement *** generally,we apply the advantage distillation method for analyzing the security of QKD with imperfect MUBs,where the error tolerance and transmission distance can be sharply *** analysis method can be applied to benchmark and standardize a practical QKD system,elucidating the security analysis of different QKD protocols with imperfect devices.

关键词： quantum key distribution mutually unbiased bases advantage distillation

RP-HPLC method for the quantitation of β-Sitosterol in Elaeagnus Gonyanthes Benth

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Journal of Pharmaceutical Analysis 2010年第3期22卷 160-162,167页

作者： De-Xi jiang,Wen-zhi chen,Dan Zhang West China School of Pharmacy,Si Chuan University,chengdu 610041,China West China School of Pharmacy Si Chuan University Chengdu 610041 China

Objective To establish an RP-HPLC method for the determination of β-Sitosterol in Elaeagnus Gonyanthes *** The separation was performed on a luna C8(2)(150 mm×4.6 mm,5μm)column with the mobile phase of methanol-water(88∶12,v/v)at a flow rate of 1.0 mL/min,the detection wavelength was set at 210 nm,and the temperature of the column was maintained at 35 ℃.Results The calibration curve of β-Sitosterol was linear over the concentration range of 0.075-0.375 mg/mL(r=0.9999)and the average recovery of β-Sitosterol was 96.30% with RSD of 3.60%(n=3).Conclusion The method is simple,rapid,and accurate,and can be used for the quality control of Elaeagnus Gonyanthes Benth.

关键词： HPLC Elaeagnus Gonyanthes Benth β-Sitosterol determination

Surface micro-arrays enhancing electromagnetic interference shielding of polydimethylsiloxane/multiwalled carbon nanotubes nanocomposites

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Nano Research 2025年第1期18卷 508-519页

作者： Ke jiang zhi chen Ji Yu chen Zheng Shan Huang Ming Wang Chongqing Key Laboratory of Soft-Matter Material Manufacturing School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China School of Mechanics Civil Engineering and ArchitecturesNorthwestern Polytechnical UniversityXi’an 710072China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China

Herein,the electromagnetic shielding performance of surface concave-convex(SC)and zig-zag micro-arrays was studied by using a simulation prediction and a three-dimensional(3D)printing custom ***,surface stripe concaveconvex(SSC)and surface cylindrical concave-convex(SCC)micro-arrays with or without zig-zag micro-arrays are designed,and their shielding performance is simulated in multi-bands(C-,X-band).The multiwalled carbon nanotubes/polydimethylsiloxane composites(MWCNT/PDMS)with different SC structures and different electrical conductivity are molded in acrylonitrile-butadiene-styrene copolymer(ABS)molds which are printed by a 3D *** results show that the electromagnetic interference shielding effectiveness(EMI SE)of the samples can be enhanced by constructing the SC micro-arrays with zig-zag micro-arrays,and improving with the increase of conductivity and *** addition,the shielding mechanism of the SC-MWCNT/PDMS composites is investigated and discussed by an electromagnetic simulation.

关键词： surface micro-arrays electrical properties electromagnetic interference(EMI)shielding three-dimensional(3D)printing

基于稀疏特征挑选和概率线性判别分析的表情识别研究

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电子学报 2018年第7期46卷 1710-1718页

作者：张瑞蒋晨之苏剑波上海交通大学自动化系系统控制与信息处理教育部重点实验室上海200240

提出一种基于稀疏特征挑选(Sparse selection)和概率线性判别分析(Probabilistic linear discriminant analysis)的表情识别方法 SS-PLDA.该方法由两部分构成:第一部分是使用稀疏的方法挑选出人脸与表情相关的区域,构造表情的完备特征集... 详细信息

提出一种基于稀疏特征挑选(Sparse selection)和概率线性判别分析(Probabilistic linear discriminant analysis)的表情识别方法 SS-PLDA.该方法由两部分构成:第一部分是使用稀疏的方法挑选出人脸与表情相关的区域,构造表情的完备特征集;第二部分是针对构造的表情完备特征集里仍含有一些其他信息,运用概率线性判别分析实现表情特征与干扰信息的分离,学习出一个只含有表情信息的子空间,最后基于该表情子空间进行表情识别分析.通过在CK+和JAFFE这两个数据库上面的实验,证实了基于稀疏特征挑选的方法可以得到识别性能的改善,且先使用特征挑选再对所挑选结果应用概率线性判别分析可以达到更好的提升效果.

关键词：人脸表情识别稀疏特征挑选子空间学习

Toward understanding the role of genomic repeat elements in neurodegenerative diseases

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Neural Regeneration Research 2025年第3期20卷 646-659页

作者： Zhengyu An Aidi jiang Jingqi chen Institute of Science and Technology for Brain-Inspired Intelligence Fudan UniversityShanghaiChina MOE Frontiers Center for Brain Science Fudan UniversityShanghaiChina MOE Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence Fudan UniversityShanghaiChina Zhangjiang Fudan International Innovation Center ShanghaiChina

Neurodegenerative diseases cause great medical and economic burdens for both patients and society;however, the complex molecular mechanisms thereof are not yet well understood. With the development of high-coverage sequencing technology, researchers have started to notice that genomic repeat regions, previously neglected in search of disease culprits, are active contributors to multiple neurodegenerative diseases. In this review, we describe the association between repeat element variants and multiple degenerative diseases through genome-wide association studies and targeted sequencing. We discuss the identification of disease-relevant repeat element variants, further powered by the advancement of long-read sequencing technologies and their related tools, and summarize recent findings in the molecular mechanisms of repeat element variants in brain degeneration, such as those causing transcriptional silencing or RNA-mediated gain of toxic function. Furthermore, we describe how in silico predictions using innovative computational models, such as deep learning language models, could enhance and accelerate our understanding of the functional impact of repeat element variants. Finally, we discuss future directions to advance current findings for a better understanding of neurodegenerative diseases and the clinical applications of genomic repeat elements.

关键词： Alzheimer's disease ataxia deep learning long-read sequencing neurodegeneration neurodegenerative diseases Parkinson's disease repeat element structural variant

Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： Mei Zhang Wenhao Li Yangfei chen Yang jiang Xiaofei Guo Han Dong School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that Lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-Le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation

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CO_2跨临界两级压缩制冷循环热力学分析

上海交通大学学报 2002年第10期36卷 1393-1395,1400页

作者：刘军朴陈江平陈芝久上海交通大学机械与动力工程学院上海200030

采用热力学方法对 CO2 跨临界两级制冷循环性能进行了分析 ,并与单级系统进行了对比 .结果表明 ,采用两级压缩可提高 CO2 循环的 COP,相同工作条件下 ,两级压缩与单级压缩系统相比 ,其 COP可提高 5 %左右 ;一定的蒸发温度下 ,CO2 循环... 详细信息

采用热力学方法对 CO2 跨临界两级制冷循环性能进行了分析 ,并与单级系统进行了对比 .结果表明 ,采用两级压缩可提高 CO2 循环的 COP,相同工作条件下 ,两级压缩与单级压缩系统相比 ,其 COP可提高 5 %左右 ;一定的蒸发温度下 ,CO2 循环的最佳冷却压力在 9.0 MPa左右 ;采用回热器在循环最佳冷却压力以下可大幅度提高系统性能 ,超过最佳冷却压力以后 ,对系统的改善很小 ;相同压缩终了压力下 ,两级压缩的排气温度可比单级压缩低 1 8　

关键词： CO2跨临界两级压缩制冷循环热力学蒸发温度最佳冷却压力排气温度

分析不同浓度对比剂对64排螺旋CT胸痛三联成像图像质量的影响分析

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中国医疗器械信息 2023年第12期29卷 125-127页

作者：姜志臣天津市北辰医院天津300100

目的:探讨分析不同浓度对比剂对64排螺旋CT胸痛三联成像图像质量的影响。方法:对195例临床胸痛患者行64排螺旋CT胸痛三联成像进行分组研究,其中男性126例,女性69例,年龄56~72岁,平均(64.23±1.23)岁,随机分为A组、B组、C组,每组65例。其... 详细信息

目的:探讨分析不同浓度对比剂对64排螺旋CT胸痛三联成像图像质量的影响。方法:对195例临床胸痛患者行64排螺旋CT胸痛三联成像进行分组研究,其中男性126例,女性69例,年龄56~72岁,平均(64.23±1.23)岁,随机分为A组、B组、C组,每组65例。其中A组(常规参数):管电压120kV,管电流200mAs,对比剂碘含量350mgl/mL,对比剂用量60mL;B组:管电压120kV,管电流100mAs,对比剂碘含量320mgl/mL,对比剂用量50mL;C组:管电压120kV,管电流80mAs,对比剂碘含量300mgl/mL,对比剂量40mL。记录各组CT容积剂量指数(CTpol)与剂量长度乘积(DLP);并对图像质量主观评价。结果:A组(CTpol)与(DLP)明显高于B组、C组,3组的图像质量主观评分A组高于B组、C组,但C组图像能够满足诊断。结论:在胸痛三联成像运用低碘浓度对比剂、低用量联合低管电流的方法,可以在保证图像质量的前提下,控制辐射剂量水平。

关键词：浓度对比剂 64排螺旋CT 胸痛三联成像 CT血管造影价值

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10kV配电变压器节能降耗关键技术研究

电力系统装备 2019年第19期 49-49,51页

作者：姜志臣中国水利水电第十四工程局有限公司云南昆明650000

如今,在社会经济高速发展的新时代下,电力的需求量也在与日俱增,这就要求电力系统需在高效和安全的环境下运行。并且在我国大力宣传节能环保理念的大背景下,给电力系统的运行又提出了更高的要求。在电力系统的运行过程中,10 kV配电变压... 详细信息

如今,在社会经济高速发展的新时代下,电力的需求量也在与日俱增,这就要求电力系统需在高效和安全的环境下运行。并且在我国大力宣传节能环保理念的大背景下,给电力系统的运行又提出了更高的要求。在电力系统的运行过程中,10 kV配电变压器的稳定性、安全性是被关注和重视的一项重要内容,其在整个电力系统中起到了转换电流电压和传输功率的作用。我国电网改革的步伐在不断前进,对配电变压器的要求也越来越高。如何在电力系统中通过配电变压器的选择和配置来达到节能减排的要求是一个值得深入研究的课题。本文将对此进行阐述和说明。

关键词： 10 kV配电变压器节能降耗选择安装