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Journal of Magnesium and Alloys 2024年第5期12卷 1830-1840页

作者： lijiao zhou Chao Shen Xueyang Hou Zhao Fang Ting Jin Keyu Xie School of Materials Science and Engineering Northwestern Polytechnical University School of Metallurgical Engineering Xi'an University of Architecture and Technology

Rechargeable Mg-ion batteries（MIBs） have attracted much more attentions by virtue of the high capacity from the two electrons chemistry.However, the reversible Mg2+diffusion in cathode materials is restricted by the strong interactions between the high-polarized bivalent Mg2+ions and anionic lattice. Herein, we design and propose a hetero-structural VO2（R）-VS4cathode, in which the re-delocalized d-electrons can effectively shield the polarity of Mg2+ions. Theoretically, the electrons should spontaneously transfer from VS4to VO2（R） through the interfaces of hetero-structure due to the lower work function value of VS4. Furthermore, the internal electrons transfer lead to the electronic injection into VO2（R） from VS4and the partially broken V-V dimers, indicating the presence of lone pair electrons and charge re-delocalization. Benefiting from the shield effect of re-delocalized electrons, and the weakened attraction between cations and O/S anions enables more S2--S22-redox groups to participate the electrochemical reactions and compensate the double charge of Mg2+ions. Accordingly,VO2（R）-VS4hetero-structure exhibits a high specific capacity of 554 mA h g-1at 50 mA g-1. It is believed that the charge re-delocalization of cathode extremely boost the Mg2+ions migration for the high-capacity of MIBs.

关键词： Mg-ion batteries Cathode Charge delocalization Electronic structure Heterostructure

Superior lithium storage performance in MoO_(3) by synergistic effects:Oxygen vacancies and nanostructures

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Journal of Energy Chemistry 2023年第3期78卷 91-101,I0003页

作者： Xueyang Hou Miao Ruan lijiao zhou Jianchun Wu Bicheng Meng Wenlong Huang Kenan Zhong Kai Yang Zhao Fang Keyu Xie School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055ShaanxiChina State Key Laboratory of Solidiﬁcation Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072ShaanxiChina School of Nuclear Science and Technology Sichuan UniversityChengdu 610064SichuanChina

Molybdenum trioxide(MoO_(3))has recently attracted wide attention as a typical conversion-type anode of Li-ion batteries(LIBs).Nevertheless,the inferior intrinsic conductivity and rapid capacity fading during charge/discharge process seriously limit large-scale commercial application of MoO_(3).Herein,the density function theory(DFT)calculations show that electron-proton co-doping preferentially bonds symmetric oxygen to form unstable HxMoO_(3).When the-OH-group in HxMoO_(3) is released into the solution in the form of H_(2)O,it is going to form MoO_(3-x)with lower binding energy.By the means of both electron-proton co-doping and high-energy nanosizing,oxygen vacancies and nanoflower structure are introduced into MoO_(3) to accelerate the ion and electronic diffusion/transport kinetics.Benefitting from the promotion of ion diffusion kinetics related to nanostructures,as well as both the augmentation of active sites and the improvement of electrical conductivity induced by oxygen vacancies,the MoO_(3-x)/nanoflower structures show excellent lithium-ion storage performance.The prepared specimen has a high lithium-ion storage capacity of 1261 mA h g^(-1)at 0.1 A g^(-1)and cyclic stability(450 cycle),remarkably higher than those of previously reported MoO_(3)-based anode materials.

关键词： 2D materials MoO_(3-x) Electron proton co-doping Lithium-ion anode Molybdenum oxide ore

A multiphase sodium vanadium phosphate cathode material for high-rate sodium-ion batteries

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Journal of Materials Science & Technology 2021年第7期66卷 121-127页

作者： Chuan Wang Hai Long lijiao zhou Chao Shen Wei Tang Xiaodong Wang Bingbing Tian Le Shao Zhanyuan Tian Haijun Su Keyu Xie Research&Development Institute of Northwestern Polytechnical University in Shenzhen Northwestern Polytechnical UniversityShenzhen 518057China State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene(NPU)Xi'an 710072China School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'an 710049China Central Analytical Research Facility Queensland University of Technology.Australia International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Shaanxi Coal and Chemical Technology Institute Co. Ltd.Jinye RoadXi'an 710070China

The unsatisfactory rate capability and poor cycling stability at high rate of sodium-ion batteries(SIBs) have impeded their practical applications. Herein, a Na_(3)V_(2)(PO_(4))_(3)/Na_(3)V_(3)(PO_(4))_(4) multiphase cathode materials for high-rate and long cycling SIBs was successfully synthesized by regulation the stoichiometric ratio of raw materials. The combined experiment and simulation results show that the multiphase materials consisted of NASICON structural phase Na3V2(PO4)3 and layered structure phase Na_(3)V_(3)(PO_(4))_(4), possess abundant phase boundaries. Electrochemical experiments demonstrate that the multiphase materials maintain a remarkable reversible capacity of 69.0 mA h g^(-1) even at an ultrahigh current density of 100 C with a high capacity retention of 81.25 % even after 10,000 cycles. Na_(3)V_(2)(PO_(4))_(3)/Na_(3)V_(3)(PO_(4))_(4) electrode exhibits a higher working voltage, superior rate capability and better cycling stability than Na_(3)V_(2)(PO_(4))_(3) electrode, which indicates that the introduction of second phase can be an effective strategy for the development of novel cathode materials for SIBs.

关键词： Sodium-ion batteries High-rate capability Multiphase Na_(3)V_(2)(PO_(4))_(3) Na_(3)V_(3)(PO_(4))_(4)

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基于混合注意力机制的管道漏磁缺陷分类实验

实验技术与管理 2024年第1期41卷 100-107页

作者：张璐莹卞雨辰周立娇蒋鹏刘英东北石油大学石油工程学院黑龙江大庆163318 中国石油天然气管道工程有限公司河北廊坊065000 东北石油大学机械科学与工程学院黑龙江大庆163318

该文将管道漏磁缺陷分类任务设计成应用型教学实验。该实验使用迁移学习的方法,调用预训练模型ResNet50,并插入主流的注意力机制(SE、CA、ECA、CBAM)进行对比分析。同时,利用Grad-CAM++可解释算法对模型内部的识别逻辑进行可视化,以便... 详细信息

该文将管道漏磁缺陷分类任务设计成应用型教学实验。该实验使用迁移学习的方法,调用预训练模型ResNet50,并插入主流的注意力机制(SE、CA、ECA、CBAM)进行对比分析。同时,利用Grad-CAM++可解释算法对模型内部的识别逻辑进行可视化,以便帮助学生更好地理解模型。实验结果显示,插入注意力机制的最优模型准确率达99.7%,能够有效识别管道中的正常情况和分类缺陷情况。该实验依托高性能计算机硬件和最新的Pytorch2.0软件包搭建了深度学习平台,有助于培养学生的创新意识和科研能力,也是对多学科交叉融合人才培养模式的探索和实践。

关键词：实验设计深度学习神经网络注意力机制漏磁缺陷检测

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新媒体时代促进大学生就业创业思路探究

新闻研究导刊 2024年第4期15卷 139-142页

作者：周丽姣马志强山西大同大学机电工程学院山西大同037003 山西大同大学煤炭工程学院山西大同037003

新媒体的迅猛发展给大学生带来许多机遇和挑战,对就业方面的影响尤为明显。在大学生就业领域,由于高校扩招、专业技能与市场需求不匹配、地区就业机会不均衡、薪资水平不合理、就业歧视等问题,大学生就业形势严峻,成为政府、教育机构和... 详细信息

新媒体的迅猛发展给大学生带来许多机遇和挑战,对就业方面的影响尤为明显。在大学生就业领域,由于高校扩招、专业技能与市场需求不匹配、地区就业机会不均衡、薪资水平不合理、就业歧视等问题,大学生就业形势严峻,成为政府、教育机构和社会各界关注的焦点。新媒体的异军突起及广泛应用,为大学生就业和创业带来了诸多利好,但也带来了一些挑战,大学生在面对琳琅满目的就业信息时,容易面临信息泄露的风险。文章提出,新媒体虽然为大学生开辟了更广阔的就业信息渠道和更灵活的就业途径,但也伴随着信息过载和虚假信息泛滥等问题,并提出了相应的解决方案。文章阐述了新媒体对大学生就业创业的积极影响和消极影响,提出了新媒体促进大学生创新创业的有效教育模式,深入探讨了新媒体平台在扩展就业创业信息源、提升大学生就业创业能力和创新就业模式方面的显著作用;分析了高校培育大学生创新思维、构建实践平台和创业生态系统的重要性,并提出了提供精准帮助和实施创业政策的必要性,认为思想政治教育在减轻大学生就业焦虑、塑造正确就业观念中扮演着至关重要的角色,为大学生在新媒体背景下树立正确的就业观、塑造健康的社会就业环境发挥了根本性作用。

关键词：新媒体大学生就业创业有效路径思想政治教育

Uniform-dispersed ZnS quantum dots loading on graphene as a promising anode for potassium-ion batteries

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Chinese Chemical Letters 2021年第3期32卷 1117-1120页

作者： Yaqin Qi Yong Yang Qian Hou Kun Zhang Hui Zhao Haijun Su lijiao zhou Xingrui Liu Chao Shen Keyu Xie Research&Development Institute of Northwestern Polytechnical University in Shenzhen Northwestern Polytechnical UniversityShenzhen 518057China State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene(NPU)Xi’an 710072China

The potassium-ion batteries(PIBs)have become the promising energy storage devices due to their relatively moderate cost and plenteous potassium resources.Whereas,the main drawback of PIBs is unsatisfacto ry electrochemical perfo rmance induced by the larger ionic radius of potassium ion.Herein,we report a well-designed,uniform-dispersed,and morphology-controllable zinc sulfide(ZnS)quantum dots loading on graphene as an anode in the PIBs.The directed uniform dispersion of the in-situ growing ZnS quantum dots(~2.8 nm in size)on graphene can mitigate the volume effect during the insertionextraction process and shorten the migration path of potassium ions.As a result,the battery exhibits superior cycling stability(350.4 mAh/g over 200 cycles at 0.1 A/g)and rate performance(98.8 mAh/g at2.0 A/g).We believe the design of active material with quantum dot-minimized size provides a novel route into PIBs and contributes to eliminating the major electrode failure issues of the system.

关键词： ZnS quantum dots Morphology-controllable Volume effect Anode Potassium-ion batteries

在老年女性中以人工智能+云诊断细胞学阅片为主导的宫颈癌联合筛查模式应用分析

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中国当代医药 2024年第5期31卷 91-94,98页

作者：姚军张丽姣李建伟周哲江苏省连云港市妇幼保健院妇科江苏连云港222000

目的探讨在老年女性中基于人工智能+云诊断细胞学阅片为主导的联合宫颈癌筛查模式的应用效果及价值。方法回顾性分析2017年1月至2021年12月连云港市妇幼保健院行宫颈锥切治疗的319例宫颈上皮内瘤变(CIN)患者病历资料,其中传统细胞学检... 详细信息

目的探讨在老年女性中基于人工智能+云诊断细胞学阅片为主导的联合宫颈癌筛查模式的应用效果及价值。方法回顾性分析2017年1月至2021年12月连云港市妇幼保健院行宫颈锥切治疗的319例宫颈上皮内瘤变(CIN)患者病历资料,其中传统细胞学检查联合人乳头瘤病毒(HPV)检测84例作为A组,人工智能+云诊断细胞学阅片联合HPV检测127例作为B组,人工智能+云诊断细胞学阅片联合高危HPV E6/E7 mRNA检测108例作为C组,比较各组年龄、孕次、阴道镜活检点数、绝经率、转化区完全可见率、宫颈管搔刮率、治疗间隔时间、冷刀锥切率、锥切后病变一致率、锥切后病变升级率。结果各组之间年龄、孕次、阴道镜活检点数、绝经率、转化区完全可见率、宫颈管搔刮率、治疗间隔时间、冷刀锥切率等指标比较,差异无统计学意义(P>0.05)。B组和C组锥切后病理结果的一致率高于A组,病变升级率低于A组,差异有统计学意义(P<0.05)。结论在老年女性中,基于人工智能+云诊断细胞学阅片技术的宫颈癌联合筛查模式具有更低的漏诊率和更高的准确率,更适用于老年女性宫颈癌筛查。

关键词：人工智能云诊断宫颈癌筛查阴道镜检查宫颈锥切

Highly improved cyclic stability of Ni-rich/Li batteries with succinic anhydride as electrolyte additive and underlying mechanism

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Journal of Energy Chemistry 2023年第3期78卷 80-90,I0003页

作者： Shu Yang Guanjie Li Xiaoyan Lin Changyong Mo Xianggui zhou lijiao Quan Kuan zhou Suli Li Hai Wang Weishan Li School of Chemistry South China Normal UniversityGuangzhou 510006GuangdongChina Zhuhai CosMX Battery Co. LtdZhuhai 519180GuangdongChina National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs Engineering Research Center of MTEES(Ministry of Education)and Key Lab.of ETESPG(GHEI)South China Normal UniversityGuangzhou 510006GuangdongChina

Lithium-metal battery based on Ni-rich cathode provides high energy density but presents poor cyclic stability due to the unstable electrode/electrolyte interfaces on both cathode and anode.In this work,we report a new strategy to address this issue.It is found that the cyclic stability of Ni-rich/Li battery can be significantly improved by using succinic anhydride(SA) as an electrolyte additive.Specifically,the capacity retention of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)/Li cell is improved from 14% to 83% after 200cycles at 1 C between 3.0 and 4.35 V by applying 5% SA.The underlying mechanism of SA contribution is understood by comparing the effects of malic anhydride(MA) and citraconic anhydride(CA), both of which share a similar molecular structure to SA but show different effects.On anode side,SA can but MA and CA cannot form a protective solid electrolyte interphase(SEI) on Li anode.On cathode side,three anhydrides can suppress the formation of hydrogen fluoride from electrolyte oxidation decomposition,but SA behaves best.Typically,MA shows adverse effects on the interface stability of Li anode and NCM811 cathode,which originates from its high acidity.Though the acidity of MA can be mitigated by substituting a methyl for one H atom at its C=C bond,the substituent CA cannot compete with SA in cyclic stability improvement of the cell,because the SEI resulting from CA is not as robust as that from SA,which is related to the binding energy of the SEI components.This understanding reveals the importance of the electrolyte acidity on the Ni-rich cathode and the robustness of the SEI on Li anode,which is helpful for rationally designing new electrolyte additives to further improve the cyclic stability of high-energydensity Ni-rich/Li batteries.

关键词： Lithium-metal battery Ni-rich cathode Electrolyte additives Succinic Anhydride Cyclic stability

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辣椒中多种农药残留筛查能力验证

食品安全导刊 2024年第19期 103-106页

作者：杨雅雅周颖雪王琼妹吴丽姣周梦丽常虹海南省检验检测研究院儋州分所海南儋州571700 海南省检验检测研究院食品检验检测中心海南海口570314

通过分析辣椒中多种农药残留筛查能力验证工作过程及其注意事项,为其他实验室参与多种农药残留筛查能力验证提供参考。依据英国分析实验室能力验证作业指导书及气相色谱-串联质谱法对辣椒中多种农药残留进行筛查,确定目标农药,并进行3... 详细信息

通过分析辣椒中多种农药残留筛查能力验证工作过程及其注意事项,为其他实验室参与多种农药残留筛查能力验证提供参考。依据英国分析实验室能力验证作业指导书及气相色谱-串联质谱法对辣椒中多种农药残留进行筛查,确定目标农药,并进行3次测试。7种目标物质3次测定结果相比较,结果接近,且相对标准偏差均小于10%,测定数值可靠;Z值在0.0~0.6,且3次测定结果的|Z|均≤2.0,本次能力验证结果为满意。

关键词：辣椒农药残留气相色谱-串联质谱法

编程教育教学活动对大班幼儿学习品质的影响研究

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幼儿教育 2024年第15期 19-24页

作者：周宇航边霞杜丽姣张克明陈子晖保定市青年路幼儿园河北保定071000 南京师范大学教育科学学院江苏南京210097 南京师范大学金陵女子学院江苏南京210097 南京师范大学美术学院江苏南京210097 成都市第一幼儿园四川成都610021

本研究通过设计大班编程教育教学活动并实施,探究其对大班幼儿学习品质的影响。研究结果显示,编程教育教学活动对大班幼儿学习品质有积极影响,实验班幼儿的学习品质整体水平及五个维度水平都得到了提升。基于此,本研究建议,应关注幼儿... 详细信息

本研究通过设计大班编程教育教学活动并实施,探究其对大班幼儿学习品质的影响。研究结果显示,编程教育教学活动对大班幼儿学习品质有积极影响,实验班幼儿的学习品质整体水平及五个维度水平都得到了提升。基于此,本研究建议,应关注幼儿“编程式”思考,为幼儿创设宽松自由的学习环境。

关键词：儿童编程教育学习品质大班幼儿