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Nano-Micro Letters 2025年第3期17卷 280-296页

作者： Chaoran Zhang Yichuan Gu Qu Jiang Ziyang Sheng ruohan feng Sihong Wang Haoyue Zhang Qianqing Xu Zijian Yuan Fang Song State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Structural reconstruction of electrocatalysts plays a pivotal role in catalytic performances for CO_(2)reduction reaction(CO_(2)RR),whereas the behavior is by far superficially ***,we report that CO_(2)accessibility results in a universal self-adaptive structural reconstruction from Cu_(2)O to Cu@CuxO composites,ending with feeding gas-dependent microstructures and catalytic *** CO_(2)-rich atmosphere favors reconstruction for CO_(2)RR,whereas the CO_(2)-deficient one prefers that for hydrogen evolution *** the assistance of spectroscopic analysis and theoretical calculations,we uncover a CO_(2)-induced passivation behavior by identifying a reductionresistant but catalytic active Cu(I)-rich amorphous layer stabilized by*CO ***,we find extra CO production is indispensable for the robust production of *** inverse correlation between durability and FECO/FEC2H4 is disclosed,suggesting that the selfstabilization process involving the absorption of*CO intermediates on Cu(I)sites is essential for durable *** by this insight,we design hollow Cu_(2)O nanospheres for durable and selective CO_(2)RR electrolysis in producing *** work recognizes the previously overlooked passivation reconstruction and self-stabilizing behavior and highlights the critical role of the local atmosphere in modulating reconstruction and catalytic processes.

关键词： CO_(2)reduction reaction Electrocatalysts Cu_(2)O Reconstruction Self-adaptive electrocatalysis

数据竞争的规制:数据的利用与数据保护的协调

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网络空间安全 2020年第1期11卷 1-5,10页

作者：冯若涵澳门大学中国澳门999078

自互联网出现以来,数据保护一直是个难题。当社交媒体网站在数字市场上大展拳脚的那一刻,对用户数据和信息的保护让决策者们不得不保持警惕。在数字经济时代的背景下,数据逐渐成为企业提升竞争力的重要要素,围绕着数据展开的市场竞争越... 详细信息

自互联网出现以来,数据保护一直是个难题。当社交媒体网站在数字市场上大展拳脚的那一刻,对用户数据和信息的保护让决策者们不得不保持警惕。在数字经济时代的背景下,数据逐渐成为企业提升竞争力的重要要素,围绕着数据展开的市场竞争越来越多。数字经济时代,企业对数据资源的重视与争夺,将网络平台权利与用户个人信息保护、互联网企业之间有关数据不正当竞争的纠纷和冲突,推上了风口浪尖。因此,如何协调和把握数据的合理利用和保护之间的关系,规制不正当竞争行为,以求在数字经济快速发展的洪流中,占据竞争优势显得尤为重要。文章将通过分析数据的二元性,讨论数据在数字经济时代的价值,并结合反不正当竞争法和实践案例,进一步讨论数据利用和保护的关系。

关键词：数据竞争数据利用个人信息保护

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青少年抑郁症患者海马磁共振成像研究进展

磁共振成像 2023年第4期14卷 120-125页

作者：冯若涵卓丽华李宏伟欧阳心芹龙拥军黄晓琦绵阳市第三人民医院(四川省精神卫生中心)放射科绵阳621000 四川大学华西医院磁共振研究中心成都610041 功能与分子影像四川省重点实验室成都610041

抑郁症是影响青少年身心健康以及致残和死亡的主要原因。关于抑郁症的发病机制目前仍不清楚,既往研究发现海马在抑郁症的发病机制中起着重要作用,海马成为了近年来很多抑郁症相关神经影像学研究的焦点,但是对于青少年的研究相对较少。... 详细信息

抑郁症是影响青少年身心健康以及致残和死亡的主要原因。关于抑郁症的发病机制目前仍不清楚,既往研究发现海马在抑郁症的发病机制中起着重要作用,海马成为了近年来很多抑郁症相关神经影像学研究的焦点,但是对于青少年的研究相对较少。本研究通过对近年来青少年抑郁症患者海马的磁共振结构成像、功能成像、波谱成像等进行简要综述发现,青少年抑郁症患者存在海马结构、功能、代谢的异常,并且这些异常改变与早期不良经历和压力事件高度相关,这可能是这些风险因素导致抑郁症的一种神经生物学机制。未来我们需要更多纵向和大样本研究来进一步验证之前的这些发现,并且需要更多关注环境等风险因素与大脑改变之间的关系。本综述通过总结青少年抑郁症患者海马研究现状及不足,为将来的研究提供参考方向,为进一步探索青少年抑郁症的发病机制提供帮助。

关键词：抑郁症青少年海马磁共振成像磁共振结构成像磁共振功能成像磁共振波谱弥散张量成像

Managing the surge:A comprehensive review of the entire disposal framework for retired lithium-ion batteries from electric vehicles

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Journal of Energy Chemistry 2024年第5期92卷 648-680页

作者： ruohan Guo feng Wang M.Akbar Rhamdhani Yiming Xu Weixiang Shen Department of Engineering Technologies School of ScienceComputing and Engineering TechnologiesSwinburne University of TechnologyMelbourne VIC 3122Australia Department of Chemistry and Biotechnology School of ScienceComputing and Engineering TechnologiesSwinburne University of TechnologyMelbourne VIC 3122Australia Department Mechanical and Product Design Engineering School of EngineeringSwinburne University of TechnologyMelbourne VIC 3122Australia

Anticipating the imminent surge of retired lithium-ion batteries(R-LIBs)from electric vehicles,the need for safe,cost-effective and environmentally friendly disposal technologies has *** paper seeks to offer a comprehensive overview of the entire disposal framework for R-LIBs,encompassing a broad spectrum of activities,including screening,repurposing and ***,we delve deeply into a thorough examination of current screening technologies,shifting the focus from a mere enumeration of screening methods to the exploration of the strategies for enhancing screening ***,we outline battery repurposing with associated key factors,summarizing stationary applications and sizing methods for R-LIBs in their second life.A particular light is shed on available reconditioning solutions,demonstrating their great potential in facilitating battery safety and lifetime in repurposing scenarios and identifying their techno-economic *** the realm of battery recycling,we present an extensive survey of pre-treatment options and subsequent material recovery ***,we introduce several global leading recyclers to illustrate their industrial processes and technical ***,relevant challenges and evolving trends are investigated in pursuit of a sustainable end-of-life management and disposal *** hope that this study can serve as a valuable resource for researchers,industry professionals and policymakers in this field,ultimately facilitating the adoption of proper disposal practices.

关键词： Lithium-ion battery Battery reproposing and recycling Miaieiials recovery technologies Techno-economic issues End-of-life management Disposal framework

一种移动平台红外搜索跟踪系统的稳定控制方法

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红外技术 2024年第6期46卷 634-645页

作者：熊辉李锐华刘海阎歆婕舒骏逸郑婕冯建伟冯若涵林宇吴佳俊林丹丹宋治杭张晋昆明物理研究所云南昆明650223 云南省红外探测技术应用重点实验室云南昆明650223

基于移动平台的红外搜索跟踪系统已成为新一代光电搜索跟踪系统的主流趋势,小型化和轻量化是其高机动性的保证。载体运动姿态变化耦合的角速度扰动和系统内部力矩干扰将对其搭载的光电载荷视轴稳定控制带来严峻挑战,基于多轴多框架和高... 详细信息

基于移动平台的红外搜索跟踪系统已成为新一代光电搜索跟踪系统的主流趋势,小型化和轻量化是其高机动性的保证。载体运动姿态变化耦合的角速度扰动和系统内部力矩干扰将对其搭载的光电载荷视轴稳定控制带来严峻挑战,基于多轴多框架和高精度陀螺反馈控制相结合的传统视轴稳定方法已无法适用。本文针对两轴两框架移动平台红外搜索跟踪系统的光电载荷视轴稳定控制,提出了基于平方PI和Luenberger扰动观测前馈的双速度闭环同阶串级控制方法。仿真和实验表明,相对于传统的单陀螺闭环和双速度闭环稳定控制方法,该稳定控制方法有效提升了载体运动低频扰动下的视轴稳定精度。1°/1 Hz扰动下,仿真稳定精度达到2.7817μrad,实验稳定精度达到35.85μrad。1°/2 Hz扰动下,仿真稳定精度达到38.199μrad,实验稳定精度达到119.1μrad。最终,利用本文提出的稳定控制方法,两轴两框架移动平台红外搜索跟踪系统有效克服了行进间载体运动姿态变化耦合的低频角速度扰动,实现了高平稳高动态的光电载荷视轴指向控制性能。

关键词：移动平台红外搜索跟踪系统视轴稳定同阶串级平方PI 扰动观测前馈

多层螺旋CT冠状动脉成像对冠心病的诊断价值研究

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空军医学杂志 2020年第2期36卷 150-152页

作者：龙拥军卓丽华冯若涵阮启超李凌霄绵阳市第三人民医院(四川省精神卫生中心)放射科四川绵阳621000

目的探讨多层螺旋CT冠状动脉成像对冠心病的诊断价值。方法选取绵阳市第三人民医院2017年6月-2018年3月收治的冠心病患者54例,患者均经冠状动脉造影检查确诊为冠心病,54例均进行了冠状动脉成像检查,收集患者影像学资料,以冠状动脉造影... 详细信息

目的探讨多层螺旋CT冠状动脉成像对冠心病的诊断价值。方法选取绵阳市第三人民医院2017年6月-2018年3月收治的冠心病患者54例,患者均经冠状动脉造影检查确诊为冠心病,54例均进行了冠状动脉成像检查,收集患者影像学资料,以冠状动脉造影检查结果为对照,计算多层螺旋CT冠状动脉成像诊断冠心病患者不同冠状动脉的灵敏度及特异度。结果对照冠状动脉造影检查结果,54例冠心病患者中,共有63支冠状动脉发生狭窄,其中左主干狭窄21支,左前降支狭窄16支,左回旋支狭窄18支,右冠状动脉狭窄8支。多层螺旋CT冠状动脉成像对冠状动脉狭窄总检出率为95.23%(60/63),其中诊断左主干狭窄检出率为100%。结论多层螺旋CT冠状动脉成像诊断冠心病灵敏度及特异度高,可清楚显示血管狭窄情况,值得临床推广。

关键词：多层螺旋CT 冠状动脉成像冠心病诊断价值

首发未用药青少年精神分裂症患者双侧楔前叶的功能及有效连接的网络异常

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四川精神卫生 2023年第5期36卷 402-408页

作者：姚洪超吴俊林李宏伟卓丽华黄国平冯若涵刘芮杉王露李真林四川大学华西医院四川成都610044 四川省精神卫生中心·绵阳市第三人民医院四川绵阳621000

背景与成年发病的精神分裂症患者相比,青少年精神分裂症患者具有基因易感性更高,阴性症状更严重,复发率更高,预后和社会功能恢复不良等特点。明确青少年精神分裂症患者脑功能异常改变对进一步阐明疾病的发病机制、探索个体化精准治疗具... 详细信息

背景与成年发病的精神分裂症患者相比,青少年精神分裂症患者具有基因易感性更高,阴性症状更严重,复发率更高,预后和社会功能恢复不良等特点。明确青少年精神分裂症患者脑功能异常改变对进一步阐明疾病的发病机制、探索个体化精准治疗具有重要意义。目的探索首发青少年精神分裂症患者静息状态下双侧楔前叶功能及有效连接的异常改变,为青少年精神分裂症患者的脑影像机制研究提供影像学参考。方法纳入符合《精神障碍诊断与统计手册(第5版)》(DSM-5)精神分裂症诊断标准的首发未用药青少年精神分裂症患者21例,同期纳入年龄、受教育程度、性别相匹配的健康对照组21例。对青少年精神分裂症患者的临床症状评估采用精神症状评定量表(PSYRAT)以及阳性和阴性症状量表(PANSS)。所有被试均进行静息态功能磁共振成像扫描,以双侧楔叶为种子点进行功能及有效连接分析,计算其与全脑的功能连接图,并分析功能连接强度与临床症状的相关性。结果在功能连接方面,患者组双侧楔前叶与左侧颞中回的功能连接高于健康对照组(P<0.01,FWE校正,簇水平P<0.05);在有效连接方面,与健康对照组比较,患者组表现出从种子区到左侧额中回的负反馈效应。相关分析结果显示,患者组从双侧楔前叶到左侧额中回有效连接减低与PANSS总评分呈正相关(r=0.450,P<0.05)。结论首发青少年精神分裂症患者静息态下双侧楔前叶功能连接及有效连接网络模式可能存在异常,其中双侧楔前叶与左侧额中回的有效连接减弱可能与患者精神症状相关。

关键词：青少年精神分裂症楔前叶 MRI成像静息态

Chemical cross-linking and mechanically reinforced carbon network constructed by graphene boosts potassium ion storage

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Nano Research 2022年第10期15卷 9019-9025页

作者： Chenxu Wang ruohan Yu Wen Luo Wencong feng Yuanhao Shen Nuo Xu Liqiang Mai Department of Physics School of ScienceWuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology430070 WuhanChina Nanostructure Research Centre(NRC) Wuhan University of TechnologyWuhan 430070China

Carbon-based electrodes of potassium-ion batteries are of great research interest ascribed to their low cost and environmentally friendly ***,traditional carbon materials usually exhibit weak mechanical properties and incomplete crosslinking,resulting in poor stability and electrochemical ***,we report a new strategy for modifying reduced graphene oxide into a uniform few-layer structure through a sol–gel method combined with acid etching *** obtained chemical cross-linking and mechanically reinforced carbon network constructed by graphene(CNCG)demonstrates excellent electrochemical and mechanical *** as a free-standing anode(~7 mg·cm^(−2))for potassium ion battery,the asachieved CNCG delivers a high reversible specific capacity of 317.7 mAh·g^(−1) at a current density of 50 mA·g^(−1) and admirable cycle stability(208.4 mAh·g^(−1) at 50 mA·g^(−1) after 500 cycles).The highly reversible structural stability and fully cross-linked properties during potassiation are revealed by ex-situ *** work provides new ideas for the synthesis of new carbon materials and the development of high-performance electrodes.

关键词： potassium-ion battery graphene electrode chemical cross-linking mechanical property storage mechanism

Comprehensive Information Security Evaluation Model Based on Multi-Level Decomposition Feedback for IoT

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Computers, Materials & Continua 2020年第10期65卷 683-704页

作者： Jinxin Zuo Yueming Lu Hui Gao ruohan Cao Ziyv Guo Jim feng School of Cyberspace Security Beijing University of Posts and TelecommunicationsBeijing100876China School of Information and Communication Engineering Beijing University of Posts and Telecommunica-tionsBeijing100876China Key Laboratory of Trustworthy Distributed Computing and Service(BUPT) Ministry of EducationBeijing100876China Amphenol Global Interconnect Systems San JoseCA 95131USA

The development of the Internet of Things(IoT)calls for a comprehensive in-formation security evaluation framework to quantitatively measure the safety score and risk(S&R)value of the network *** this paper,we summarize the architecture and vulnerability in IoT and propose a comprehensive information security evaluation model based on multi-level decomposition *** evaluation model provides an idea for information security evaluation of IoT and guides the security decision maker for dynamic ***,we establish an overall evaluation indicator system that includes four primary indicators of threat information,asset,vulnerability,and management,*** also includes eleven secondary indicators of system protection rate,attack detection rate,confidentiality,availability,controllability,identifiability,number of vulnerabilities,vulnerability hazard level,staff organization,enterprise grading and service continuity,***,we build the core algorithm to enable the evaluation model,wherein a novel weighting technique is developed and a quantitative method is proposed to measure the S&R ***,in order to better supervise the performance of the proposed evaluation model,we present four novel indicators includes residual risk,continuous conformity of residual risk,head-to-tail consistency and decrease ratio,*** results show the advantages of the proposed model in the evaluation of information security for IoT.

关键词： IoT information security quantitative evaluation safety score residual risk

Structure-preserving algorithms for guiding center dynamics based on the slow manifold of classical Pauli particle

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Plasma Science and Technology 2024年第6期26卷 88-102页

作者：张若涵王正汹肖建元王丰 Key Laboratory of Materials Modification by Laser Ion and Electron BeamsSchool of PhysicsDalian University of TechnologyDalian 116024People’s Republic of China Department of Plasma Physics and Fusion Engineering University of Science and Technology of ChinaHefei 230026People’s Republic of China

The classical Pauli particle(CPP) serves as a slow manifold, substituting the conventional guiding center dynamics. Based on the CPP, we utilize the averaged vector field(AVF) method in the computations of drift orbits. Demonstrating significantly higher efficiency, this advanced method is capable of accomplishing the simulation in less than one-third of the time of directly computing the guiding center motion. In contrast to the CPP-based Boris algorithm, this approach inherits the advantages of the AVF method, yielding stable trajectories even achieved with a tenfold time step and reducing the energy error by two orders of magnitude. By comparing these two CPP algorithms with the traditional RK4 method, the numerical results indicate a remarkable performance in terms of both the computational efficiency and error elimination. Moreover, we verify the properties of slow manifold integrators and successfully observe the bounce on both sides of the limiting slow manifold with deliberately chosen perturbed initial conditions. To evaluate the practical value of the methods, we conduct simulations in non-axisymmetric perturbation magnetic fields as part of the experiments,demonstrating that our CPP-based AVF method can handle simulations under complex magnetic field configurations with high accuracy, which the CPP-based Boris algorithm lacks. Through numerical experiments, we demonstrate that the CPP can replace guiding center dynamics in using energy-preserving algorithms for computations, providing a new, efficient, as well as stable approach for applying structure-preserving algorithms in plasma simulations.

关键词： structure-preserving algorithm averaged vector field classical Pauli particle guiding center dynamics