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Journal of Energy Chemistry 2024年第2期89卷 137-143,I0005页

作者： Maoyi Yi Jie Li Mengran Wang Xinming Fan Bo Hong zhian zhang Aonan Wang Yanqing Lai School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina Engineering Research Centre of Advanced Battery Materials The Ministry of EducationChangsha 410083HunanChina Hunan Province Key Laboratory of Nonferrous Value-Added Metallurgy Central South UniversityChangsha 410083HunanChina

The poor electrochemical performance of all-solid-state batteries(ASSBs),which is assemblied by Ni-rich cathode and poly(ethylene oxide)(PEO)-based electrolytes,can be attributed to unstable cathodic interface and poor crystal structure stability of Ni-rich *** coating strategies are previously employed to enhance the stability of the cathodic interface and crystal structure for Ni-rich ***,these methods can hardly achieve simplicity and high efficiency *** this work,polyacrylic acid(PAA)replaced traditional PVDF as a binder for cathode,which can achieve a uniform PAA-Li(LixPAA(0

关键词： Single-crystal LiNi_(0.83)Co_(0.12)Mn_(0.05)O_(2) In-situ coating PAA-Li Partial protonation

基于四叉树法和PROSAC算法改进的视觉SLAM技术

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兵工自动化 2024年第5期43卷 37-42页

作者：杜根张志安南京理工大学机械工程学院南京210094

为解决在同时定位与地图构建(simultaneous localization and mapping,SLAM)的前端进行特征点匹配时,随机抽样一致法(random sample consensus,RANSAC)存在的迭代次数高、实时性较差、鲁棒性不稳定等问题,提出一种基于四叉树法和渐进一... 详细信息

为解决在同时定位与地图构建(simultaneous localization and mapping,SLAM)的前端进行特征点匹配时,随机抽样一致法(random sample consensus,RANSAC)存在的迭代次数高、实时性较差、鲁棒性不稳定等问题,提出一种基于四叉树法和渐进一致采样法(progressive sample consensus,PROSAC)算法融合改进的图像匹配算法。实现四叉树法+PROSAC算法的误匹配剔除算法,在EuRoC数据集上对改进后的ORB-SLAM2算法进行实验。结果表明:相比于ORB-SLAM2系统,该算法在Vicon Room 103数据集上总体绝对轨迹误差平均值减小了39.28%,总体相对位姿误差减小了35.45%,具有更高的建图精度。

关键词：四叉树编码特征点匹配 PROSAC算法 SLAM

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从一起事故看叉车的安全管理

西部特种设备 2024年第3期7卷 37-39,66页

作者：张志安芜湖市特种设备监督检验中心安徽芜湖241000

本文以一起叉车事故为例,介绍了事故发生的经过并对事故的原因进行了分析,找到了事故发生的主要原因和次要原因。本文针对事故产生的原因提出具体的建议,目的是减少类似事故,达到安全生产的目标。

关键词：叉车事故原因

改进RRT的复杂障碍物环境路径规划算法研究

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电子设计工程 2024年第8期32卷 162-167,172页

作者：牛旭张志安南京理工大学机械工程学院江苏南京210094

为解决传统的RRT算法在复杂障碍物环境下时,存在采样随机性大,搜索效率低,规划路径曲折等问题,提出一种改进的RRT算法。将传统RRT算法的随机树扩展引入自适应步长目标偏置策略,加快向目标点的收敛速度;结合人工势场法的概念,在随机树中... 详细信息

为解决传统的RRT算法在复杂障碍物环境下时,存在采样随机性大,搜索效率低,规划路径曲折等问题,提出一种改进的RRT算法。将传统RRT算法的随机树扩展引入自适应步长目标偏置策略,加快向目标点的收敛速度;结合人工势场法的概念,在随机树中引入目标点的引力分量和障碍物周围的斥力分量,并限制障碍物附近的搜索区域;对改进RRT算法规划的路径引入局部定向剪枝概念,对路径关键点择优剪枝选取,快速逃离局部振荡阶段;加入三次B样条曲线对路径进行平滑处理,降低路径曲折程度,以保证路径的可行性。通过实验表明,改进的RRT算法在保证对同一路径搜索的同时,显著地减少了68.5%的搜索时间,并且减少了20%的节点迭代次数,更适用于复杂障碍物环境下的路径规划。

关键词：路径规划 RRT 自适应步长偏置人工势场定向剪枝样条B曲线

Analysis of an improved trajectory correction scheme based on mass blocks

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Journal of Systems Engineering and Electronics 2019年第1期30卷 180-190页

作者： LEI Xiaoyun zhang zhian DU Zhonghua School of Mechanical Engineering Nanjing University of Science and Technology

In conventional technical trajectory correction schemes,continuous attitude adjusting mechanisms, such as canards, are inferior in terms of response time and efficiency of executing instructions. Discontinuous attitude adjusting mechanisms, such as the lateral pulse jet, have complex impact on the airflow layer of the projectile surface caused by the thrust vector jet flow. An improved two-dimensional trajectory correction mechanism is designed based on the principle of firing mass blocks by a tailor-made propellant. The mechanical properties of the thrust force(namely the correction force) is analyzed. The trajectory correction model is established to analyze the effects of correction starting moment and correction phase angle of a thrust force on the projectile's trajectory. According to the trajectory correction scheme, an improved genetic algorithm is employed to this work. The scheme is tested in the simulation. The results show that the correction scheme is effective to reduce target dispersion and increase the precision of the impact point.

关键词： trajectory correction mass block correction force correction control algorithm genetic algorithm.

增强“虚拟现实”:AIGC时代中华优秀传统文化的新质生产力

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青年探索 2024年第5期 25-36页

作者：张志安吕伟松复旦大学全球传播全媒体研究院复旦大学新闻学院复旦大学传播与国家治理研究中心华东师范大学马克思主义学院

以AIGC(生成式人工智能)为代表的新质生产力,为中华优秀传统文化的叙事传播提供了新动力、新机制和新机遇。AIGC技术赋能中华优秀传统文化的新质生产力,主要体现在文化诠释沉浸式体验的高科技、文化价值内核具象感知的高效能、文化知识... 详细信息

以AIGC(生成式人工智能)为代表的新质生产力,为中华优秀传统文化的叙事传播提供了新动力、新机制和新机遇。AIGC技术赋能中华优秀传统文化的新质生产力,主要体现在文化诠释沉浸式体验的高科技、文化价值内核具象感知的高效能、文化知识生产叙事优化的高质量等三个层面。为充分发挥AIGC在中华优秀传统文化传播中的积极作用,增进青年群体文化认同,需在技术革新上探寻技术赋能与文化传播的联动,在政策保障上构建人工智能内容行业的制度规范,在平台应用上丰富文化叙事传播的有效性和互动性。运用AIGC技术为文化传承发展助力的同时也需防范潜在风险,既要辨析内容真实与版权归属、增强内容叙事原创性生产,也要注重文本内容生产的创意性、避免同质机械化输出,还要警惕技术或流量崇拜、确保文化产品叙事创新的理性价值。

关键词： AIGC 中华优秀传统文化新质生产力技术赋能文化认同

同方期刊数据库博看期刊

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中国青年研究热点议题与学术启示

青年探索 2024年第1期 20-31页

作者：张志安龚沈希复旦大学信息与传播研究中心复旦发展研究院传播与国家治理研究中心复旦大学新闻学院

2023年是全面贯彻党的二十大精神的开局之年,面对国内外复杂多变的发展形势,作为标志时代最为灵敏的晴雨表,青年群体身上既有社会发展多变性复杂性艰巨性的直接投射,也有个体努力寻求自我价值能动性个体性调适性的积极尝试。文章尝试以... 详细信息

2023年是全面贯彻党的二十大精神的开局之年,面对国内外复杂多变的发展形势,作为标志时代最为灵敏的晴雨表,青年群体身上既有社会发展多变性复杂性艰巨性的直接投射,也有个体努力寻求自我价值能动性个体性调适性的积极尝试。文章尝试以具有启发意义的热点议题为切入视角,勾勒2023年国内学界关于青年研究的知识版图。通过研读筛选中文主流期刊的研究论文,将当下青年研究关注的重要领域概括为八个主题:青年就业、青年婚恋与家庭、青年流动与社会融入、青年消费、青年教育、青年社会心态与观念、青年媒介使用、青年工作与政策。文章认为,当下青年研究整体上显示了更精细的颗粒度和更丰富的话语层次,青年研究在延续传统学术关切的基础上对经典范式有所拓展。此外,文章还就青年研究的想象力、青年研究子领域间的理论对话、青年研究的实践性等问题给出思考,以期为学界推动青年研究的高质量发展提供启示。

关键词：青年青年研究研究热点知识版图

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Nitrogen doping and graphitization tuning coupled hard carbon for superior potassium-ion storage

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Journal of Energy Chemistry 2020年第10期29卷 327-334页

作者： Junxian Hu Yangyang Xie Meng Yin zhian zhang School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina

Hard carbon material is one of the most promising anode materials for potassium ion batteries(PIBs)due to its distinct disordered and non-expandable ***,the intrinsically disordered microarchitecture of hard carbon results in low electric conductivity and poor rate ***,nitrogendoped and partially graphitized hard carbons(NGHCs)derived from commercial coordination compound precursor-ethylenediaminetetraacetic acid(EDTA)disodium cobalt salt hydrate are designed and prepared as high-performance PIBs anode *** means of a facile annealing method,nitrogen elements and graphitic domains can be controllably introduced to *** resulting NGHCs show structural merits of mesoporous construction,nitrogen doping and homogeneous graphitic domains,which ensures fast kinetics and electron *** in anode for PIBs,NGHCs exhibit robust rate capability with high reversible capacity of 298.8 m Ah g^-1 at 50 m A g^-1,and stable cycle stability of 137.6 mAh g^-1 at 500 m A g^-1 after 1000 ***,the ex situ Raman spectra reveal a mixture"adsorption-intercalation mechanism"for potassium storage of *** importantly,full PIBs by pairing with perylenetetracarboxylic dianhydride(PTCDA)cathode demonstrate the promising potential of practical *** terms of commercial precursor,facile synthesis and long cycle lifespan,NGHCs represent a brilliant prospect for practical large-scale applications.

关键词： Hard carbon Nitrogen doping Graphitic domains Potassium ion batteries Adsorption-intercalation mechanism

Unveiling nanoplates-assembled Bi2MoO6 microsphere as a novel anode material for high performance potassium-ion batteries

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Nano Research 2020年第10期13卷 2650-2657页

作者： Junxian Hu Yangyang Xie Jingqiang Zheng Yanqing Lai zhian zhang School of Metallurgy and Environment Central South Universityy Changsha 410083China

Bismuth (Bi)-based electrode has aroused tremendous interest in potassium-ion batteries (PIBs) on account of its low cost, high electronic conductivity, low charge voltage and high theoretical capacity. However, the rapid capacity fading and poor lifespan induced by the normalized volume expansion (up to ~ 406%) and serious aggregation of Bi during cycling process hinder its application. Herein, bismuth molybdate (Bi2MoO6) microsphere assembled by 2D nanoplate units is successfully prepared by a facile solvothermal method and demonstrated as a promising anode for PIBs. The unique microsphere structure and the self-generated potassium molybdate (K-Mo-O species) during the electrochemical reactions can effectively suppress mechanical fracture of Bi-based anode originated from the volume variation during charge/discharge of the battery. As a result, the Bi2MoO6 microsphere without hybridizing with any other conductive carbon matrix shows superior electrochemical performance, which delivers a high reversible capacity of 121.7 mAh·g^−1 at 100 mA·g^−1 over 600 cycles. In addition, the assembled perylenetetracarboxylic dianhydride (PTCDA)//Bi2MoO6 full-cell coupled with PTCDA cathode demonstrates the potential application of Bi2MoO6 microsphere. Most importantly, the phase evolution of Bi2MoO6 microsphere during potassiation/depotassiation process is successfully deciphered by ex situ X-ray diffraction (XRD), X-ray photoemission spectroscopy (XPS), and transmission electron microscopy (TEM) technologies, which reveals a combination mechanism of conversion reaction and alloying/dealloying reaction for Bi2MoO6 anode. Our findings not only open a new way to enhance the performance of Bi-based anode in PIBs, but also provide useful implications to other alloy-type anodes for secondary alkali-metal ion batteries.

关键词： Bi2MoO6 microsphere potassium ion batteries mechanism anode

NaF-rich protective layer on PTFE coating microcrystalline graphite for highly stable Na metal anodes

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Nano Research 2023年第2期16卷 2436-2444页

作者： Yangyang Xie Congyin Liu Jingqiang Zheng Huangxu Li Liuyun zhang zhian zhang School of Metallurgy and Environment Engineering Research Center of the Ministry of Education for Advanced Battery MaterialsHunan Provincial Key Laboratory of Nonferrous Value-Added MetallurgyCentral South UniversityChangsha 410083China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341000China Department of Chemistry City University of Hong Kong Kowloon Hong KongChina

The practical application of Na metal anode is plagued by the dendrite growth,unstable solid electrolyte interphase(SEI)formation and volume change during the cycling ***,poly(tetrafluoroethylene)(noted as PTFE)coating microcrystalline graphite is designed as the sodium metal anode host by a facile and cost-effective *** isotropous microcrystalline graphite(MG)is conducive to guiding Na+to form a co-intercalation structure into *** the PTFE coating layer can form NaF as artificial SEI film for uniform ion transport and *** a result,the gained PTFE coating MG electrode can deliver a long-life span over 1,200 cycles with an average Coulombic efficiency(CE)of 99.88%.To note,almost the CE in each cycle is around 99.8%–100%.When assembled with Na_(3)V_(2)(PO_(4))_(2)F_(3)cathode as full cells,the full cell paired with PTFE coating MG electrode can operate much stable than that of MG electrode for the existence of PTFE coating *** utilized as sodium-free Na metal anode paired with Na_(3)V_(2)(PO_(4))_(2)F_(3)cathode,it can also deliver a high initial CE of 76.27%at 0.5 *** 100 cycles,it still has a high discharge capacity of 83.5 mAh·g^(−1).

关键词： Na metal anodes poly(tetrafluoroethylene)(PTFE) microcrystalline graphite co-intercalation uniform deposition