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由完备序列构造零相关区序列集的方法

北京邮电大学学报 2008年第4期31卷 122-125页

作者：左会娟佟鑫温巧燕河北师范大学数学与信息科学学院石家庄050016 北京邮电大学网络与交换技术国家重点实验室北京100876

提出了一种由一个完备序列的移位序列集和酉矩阵构造零相关区序列集的方法.该方法主要通过适当地选择完备序列的移位序列做成的正交序列集,结合相应阶数的酉矩阵进行序列扩展,从而得到几乎最优和最优的2类零相关区序列集.

关键词：完备序列零相关区序列集相关积酉矩阵

Furfural residues derived nitrogen-sulfur co-doped sheet-like carbon: An excellent electrode for dual carbon lithium-ion capacitors

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Green Energy & Environment 2024年第9期9卷 1427-1439页

作者： Xiaoying Guo yan qiao Zonglin Yi Christian Marcus Pedersen Yingxiong Wang Xiaodong Tian Peide Han College of Materials Science and Engineering Taiyuan University of Technology State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences CAS Key Laboratory of Carbon Materials Institute of Coal Chemistry Chinese Academy of Sciences Department of Chemistry University of Copenhagen Universitetsparken 5 College of Chemistry Taiyuan University of Technology

The state-of-the-art lithium-ion capacitors （LICs）,consisting of high-capacity battery-type anode and high-rate capacitor-type cathode,can deliver high energy density and large power density when comparing with traditional supercapacitors and lithium-ion batteries,***,the ion kinetics mismatch between cathode and anode leads to unsatisfied cycling lifetime and anode *** efforts have been devoted to solving the abovementioned *** promising strategy is altering high conductive hard carbon anode with excellent structural stability to match with activated carbon cathode,assembling dual-carbon *** this contribution,one-pot in-situ expansion and heteroatom doping strategy was adopted to prepare sheet-like hard carbon,while activated carbon was obtained involving *** persulfate was used as expanding and doping agent *** furfural residues （FR） were served as carbon *** resulting hard carbon （FRNS-HC） and activated carbon （FRNS-AC）show excellent electrochemical performance as negative and positive electrodes in a lithium-ion battery （LIB）.To be specific,374.2 m Ah g-1and 123.1 m Ah g-1can be achieved at 0.1 A g-1and 5 A g-1when FRNS-HC was tested as *** combined with a highly porous carbon cathode (SBET=2961 m2g-1) synthesized from the same precursor,the LIC showed high specific energy of147.67 Wh kg-1at approximately 199.93 W kg-1,and outstanding cycling life with negligible capacitance fading over 1000 *** study could lead the way for the development of heteroatom-doped porous carbon nanomaterials applied to Li-based energy storage applications.

关键词： Furfural residue Ammonium persulfate Sheet-like carbon Lithium-ion capacitors Hard carbon

Ultrafast laser processing of camouflaged metals by topography inherited multistep removal for information encryption

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Nano Research 2024年第8期17卷 7242-7249页

作者： Guangzhi He Jianfeng yan Jiawang Xie Ming qiao Ma Luo Yuzhi Zhao Haoze Han State Key Laboratory of Tribology in Advanced Equipment Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China

Surfaces with micro-nanoscale structures show different optical responses,including infrared reflection,thermal radiation,and protective *** realization of structure camouflage is important for material ***,external cloaks or coatings are necessary in structure camouflage,which limits the surface ***,we propose a novel strategy for the direct structure camouflage through topography inherited removal(TIR)with ultrafast laser,featuring pristine topography preservation and scattering surface *** multistep TIR,pristine topographies are partially and uniformly removed to preserve the original designed *** response changes show the suppression of specular reflection by uniformizing reflected light intensity to a low level on the inherited *** produce various structure camouflages on large scaled substrates,and demonstrate applications of information encryption in code extraction and word recognition through structure *** proposed strategy opens opportunities for infrared camouflage and other technologies,such as thermal management,device security,and information encryption.

关键词： topography inherited removal ultrafast laser structure camouflage optical response information encryption

An improved model combining machine learning and Kalman filtering architecture for state of charge estimation of lithium-ion batteries

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Green Energy and Intelligent Transportation 2024年第4期3卷 1-11页

作者： yan Li Min Ye qiao Wang Gaoqi Lian Baozhou Xia National Engineering Research Center for Highway Maintenance Equipment Chang'an UniversityXi'an710064China Chair for Electrochemical Energy Conversion and Storage Systems Institute for Power Electronics and Electrical Drives(ISEA)RWTH Aachen UniversityAachen52062Germany

Accurate state of charge(SOC)estimation of lithium-ion batteries is a fundamental prerequisite for ensuring the normal and safe operation of electric vehicles,and it is also a key technology component in battery management *** recent years,lithium-ion battery SOC estimation methods based on data-driven approaches have gained significant ***,these methods commonly face the issue of poor model generalization and limited *** address such issues,this study proposes a closed-loop SOC estimation method based on simulated annealing-optimized support vector regression(SA-SVR)combined with minimum error entropy based extended Kalman filter(MEE-EKF)***,a probability-based SA algorithm is employed to optimize the internal parameters of the SVR,thereby enhancing the precision of original SOC ***,utilizing the framework of the Kalman filter,the optimized SVR results are incorporated as the measurement equation and further processed through the MEE-EKF,while the ampere-hour integral physical model serves as the state equation,effectively attenuating the measurement noise,enhancing the estimation accuracy,and improving generalization *** proposed method is validated through battery testing experiments conducted under three typical operating conditions and one complex and random operating condition with wide temperature variations under only one condition *** results demonstrate that the proposed method achieves a mean absolute error below 0.60%and a root mean square error below 0.73%across all operating conditions,showcasing a significant improvement in estimation accuracy compared to the benchmark *** high precision and generalization capability of the proposed method are evident,ensuring accurate SOC estimation for electric vehicles.

关键词： Lithium-ion battery State of charge estimation Support vector regression Simulated annealing optimization Kalman filter

Impact Performance Research of Re-Entrant Octagonal Negative Poisson’s Ratio Honeycomb with Gradient Design

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Computer Modeling in Engineering & Sciences 2024年第9期140卷 3105-3119页

作者： Yiyuan Li Yongjing Li Shilin yan Pin wen Department of Engineering Structure and Mechanics Wuhan University of TechnologyWuhan430070China Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics School of ScienceWuhan University of TechnologyWuhan430070China

Based on the traditional re-entrant honeycomb,a novel re-entrant octagon honeycomb(ROH)is *** deformation mode of the honeycomb under quasi-static compression is analyzed by numerical simulation,and the results are in good agreement with the experimental *** deformation modes,mechanical properties,and energy absorption characteristics of ROH along the impact and perpendicular directions gradient design are investigated under different *** results indicated that the deformation mode of ROH is affected by gradient design along the direction of impact and impact *** addition,gradient design along the direction of impact can increase the initial peak stress of ROH and accelerate its densification *** design perpendicular to the impact direction can enhance the energy absorption performance of ROH,especially for ROH,with wall thickness increasing from the inside *** to ROH with uniform wall thickness at the same relative density,ROH with a gradient design can increase the plateau stress by over *** the elevation of impact velocity,the plateau stress and specific energy absorption exhibit an upward trend,aligning with the dynamic performance pattern observed in conventional *** results can be used as a reference for the design and application of honeycomb and provide a new idea for developing more efficient and reliable energy-absorbing materials.

关键词： Re-entrant honeycomb gradient design finite element analysis additive manufacturing technologies

Ocular surface in patients with different degrees of myopia

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International Journal of Ophthalmology(English edition) 2024年第7期17卷 1313-1321页

作者： yan-Yun Lyu Shuang Wang Xiao-Niao Chen Zhen-Yu Wang Shan-Shan Huang yan Yuan Hong-Shuang Lu wen-Li yang Li-Ya qiao Lei Tian Ying Jie Tongren Eye Care Center Beijing Tongren HospitalCapital Medical UniversityBeijing 100730China Beijing Institute of Ophthalmology Beijing Tongren Eye CenterBeijing Tongren HospitalCapital Medical University and Beijing Ophthalmology and Visual Sciences Key LaboratoryBeijing 100730China Department of Ophthalmology the Third Medical Center of Chinese People’s Liberation Army General HospitalBeijing 100039China Department of Ophthalmology and Visual Science Tokyo Medical and Dental UniversityTokyo 113-8510Japan

AIM:To investigate the clinical features of the ocular surface in patients with different degrees of ***:A cross-sectional study was conducted involving 122 participants with myopia in Beijing Tongren Hospital from February to June,*** completing the Ocular Surface Disease Index(OSDI)score scale,measurements were taken for refraction,biometric parameters and ocular surface *** prevalence,severity and related parameters of the dry eye among different groups based on axial length(AL)were *** analysis was performed between ocular surface parameters and refraction/biometric measurement ***:Statistically significant differences were observed in refractive error,corneal thickness,anterior chamber depth,and subfoveal choroidal thickness among the groups(all P<0.05).With the increase in AL,the incidence and severity of dry eye increased significantly(P<0.05).Moreover,the tear film break-up time(BUT)shortened(P<0.05),and the corneal fluorescein staining(CFS)points increased significantly(P<0.05).OSDI scores were positively correlated with AL and spherical equivalent(SE;both P<0.05);BUT was negatively correlated with AL,SE,and corneal astigmatism(AST;all P<0.05);Schirmer I test(SIT)results were negatively correlated with AL and SE(both P<0.05).CONCLUSION:AL elongation is a risk factor for dry eye onset in myopic *** longer the AL,the more severe the dry eye is,with the increased CFS spots and tear film ***,SE and AST exhibit negative correlations with dry eye symptom scores and ocular surface parameters.

关键词： myopia axial length ocular surface dry eye

Regulation role of miR-204 on SIRT1/VEGF in metabolic memory induced by high glucose in human retinal pigment epithelial cells

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International Journal of Ophthalmology(English edition) 2024年第7期17卷 1232-1237页

作者： qiao-Ling Lai Ting Xie Wei-Dong Zheng yan Huang Department of Ophthalmology Renmin Hospital of Wuhan UniversityWuhan 460060Hubei ProvinceChina Department of Ophthalmology The First Affiliated Hospital of Fujian Medical UniversityFuzhou 350004Fujian ProvinceChina Department of Ophthalmology&Optometry Fujian Medical UniversityFuzhou 350004Fujian ProvinceChina

AIM:To examine the regulatory role of microRNA-204(miR-204)on silent information regulator 1(SIRT1)and vascular endothelial growth factor(VEGF)under highglucose-induced metabolic memory in human retinal pigment epithelial(hRPE)***:Cells were cultured with either normal(5 mmol/L)or high D-glucose(25 mmol/L)concentrations for 8d to establish control and high-glucose groups,*** induce metabolic memory,cells were cultured with 25 mmol/L D-glucose for 4d followed by culture with 5 mmol/L D-glucose for *** addition,exposed in 25 mmol/L D-glucose for 4d and then transfected with 100 nmol/L miR-204 control,miR-204 inhibitor or miR-204 mimic in 5 mmol/L D-glucose for *** reverse transcription-polymerase chain reaction(RT-qPCR)was used to detect miR-204 mRNA ***1 and VEGF protein levels were assessed by immunohistochemical and Western *** cytometry was used to investigate apoptosis ***:It was found that high glucose promoted miR-204 and VEGF expression,and inhibited SIRT1 activity,even after the return to normal glucose culture *** of miR-204 promoted apoptosis inhibiting SIRT1 and increasing VEGF ***,downregulation of miR-204 produced the opposite ***:The study identifies that miR-204 is the upstream target of SIRT1and VEGF,and that miR-204 can protect hRPE cells from the damage caused by metabolic memory through increasing SIRT1 and inhibiting VEGF expression.

关键词： human retinal pigment epithelial metabolic memory microRNA-204 silent information regulator 1 vascular endothelial growth factor high-glucose

利用Bell态纠缠交换的环式量子秘密共享协议

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北京邮电大学学报 2006年第2期29卷 34-37页

作者：秦素娟温巧燕朱甫臣北京邮电大学理学院北京100876 现代通信国家重点实验室成都610041

为使量子秘密共享易于实现,提出了一种基于Bell态纠缠交换的协议.参与方的量子信道构成一个环,通过在环上添加或删除节点可以构造任意多方协议,并且对其他参与方没有任何影响.分析表明,上述协议不仅能抵抗外部窃听者的窃听,而且能抵抗... 详细信息

为使量子秘密共享易于实现,提出了一种基于Bell态纠缠交换的协议.参与方的量子信道构成一个环,通过在环上添加或删除节点可以构造任意多方协议,并且对其他参与方没有任何影响.分析表明,上述协议不仅能抵抗外部窃听者的窃听,而且能抵抗内部参与方的欺骗,具有无条件安全性.

关键词：量子秘密共享纠缠交换量子密码

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F_2~n上的正形置换

北京邮电大学学报 2006年第1期29卷 115-118页

作者：常祖领柯品惠莫骄温巧燕北京邮电大学理学院

讨论了正形置换的构造和性质,并分析了正形置换的幂次是否仍是正形置换.对于线性正形置换,根据矩阵标准型的性质,只要整数i不能被这个正形置换对应矩阵的极小多项式的各个根的阶整除,则这个线性正形置换的i次幂仍是线性正形置换.对于非... 详细信息

讨论了正形置换的构造和性质,并分析了正形置换的幂次是否仍是正形置换.对于线性正形置换,根据矩阵标准型的性质,只要整数i不能被这个正形置换对应矩阵的极小多项式的各个根的阶整除,则这个线性正形置换的i次幂仍是线性正形置换.对于非线性正形置换,给出了有用的结果.

关键词：置换正形置换若当标准型