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Vanadium-based cathodes for aqueous zinc ion batteries: Structure,mechanism and prospects

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Chinese Chemical Letters 2023年第2期34卷 97-108页

作者： Yi Ding Lele Zhang Xin Wang lina Han Weike Zhang Chunli Guo College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

As an emerging energy storage device with high-safety aqueous electrolytes, low-cost, environmental benignity and large-reserves, the rechargeable aqueous zinc-ion batteries(AZIBs) have attracted more and more attention. Vanadium-based compounds are also supposed as the potential candidate cathode materials for AZIBs due to their wide variety of phases, variable crystal structures and high theoretical capacity. In this review, the recent progress in the development of vanadium-based materials was summarized,and the relationship between the crystal structure types of active materials and Zn-ion transport mechanism was highlighted. During the charge-discharge process, the different electrostatic repulsion between the cations of vanadium-based compounds with different crystal structures and Zn^(2+)results in a variety of the Zn-ion storage mechanisms, which can be significant guidance for designing the advanced batteryelectrode materials for AZIBs. Furthermore, other factors associated with the storage mechanisms, such as electrolyte components and electrode morphology, are discussed. Finally, the strategies to improve the electrical conductivity, inhibit the dissolution and stabilize the crystal structure of vanadium-based compounds are proposed and the future prospects for developing high-energy-density AZIBs are presented.

关键词： Aqueous zinc ion batteries Vanadium-based materials Crystal structure Storage mechanisms Recent advances

Properties of multi‑GNSS uncalibrated phase delays with considering satellite systems,receiver types,and network scales

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Satellite Navigation 2023年第3期4卷 92-106页

作者： Ping Zeng Zhetao Zhang Yuanlan Wen Xiufeng He lina He Muzi Li Wu Chen School of Earth Sciences and Engineering Hohai UniversityNanjing 211100China Shanghai Aerospace Control Technology Institute Shanghai 201109China Department of Land Surveying and Geo‑Informatics The Hong Kong Polytechnic UniversityHong KongChina

the Wide-Lane(WL)and Narrow-Lane(NL)uncalibrated Phase Delays(uPDs)are the prerequisites in the traditional Precise Point Positioning(PPP)Ambiguity Resolution(AR).As the generation mechanism of various biases becomes more complex,we systematically studied the impact factors of four satellite systems WL and NL uPDs from the perspective of parameter *** 100 stations in a global network are used to generate the *** results of different satellite systems show that the estimation method,update frequency,and solution mode need to be treated *** regional networks with different receiver types,JAVAD,and Trimble,are also *** results indicate that the receiver-dependent bias has an influence on uPD ***,the hardware delays can inhibit the satellite-side uPDs if these receiver-specific errors are not fully deployed or even ***,the temporal stability and residual distribution of NL uPDs are significantly enhanced by utilizing a regional network,with the improvements by over 68%and 40%,*** demonstrates that different network scales exhibit the different implication of unmodeled errors,and the unmodeled errors cannot be ignored and must be handled in uPD estimation.

关键词： WL uPD NL uPD Satellite system Receiver type Network scale

基于网络药理学及分子对接技术探讨大果木姜子挥发油抑菌作用机制

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贵州科学 2024年第4期42卷 5-11页

作者：苟娜郭江涛刘杰简梨娜贵州中医药大学药学院贵州贵阳550025 国家苗药工程技术研究中心贵州贵阳550025 贵州中药炮制与制剂工程技术研究中心贵州贵阳550025

目的:旨在以网络药理学方法和分子对接技术为基础,对大果木姜子挥发油抑菌的主要有效成分和潜在作用机制进行探究。方法:通过TCMSP、CNKI等数据库检索大果木姜子挥发油的化学成分,并预测大果木姜子挥发油和抑菌有关靶点;构建“有效成分... 详细信息

目的:旨在以网络药理学方法和分子对接技术为基础,对大果木姜子挥发油抑菌的主要有效成分和潜在作用机制进行探究。方法:通过TCMSP、CNKI等数据库检索大果木姜子挥发油的化学成分,并预测大果木姜子挥发油和抑菌有关靶点;构建“有效成分-目标靶点”网络;共有靶点被用于GO和KEGG富集分析以及分子对接,预测有效成分与重点目标靶点的结合度。结果:获得大果木姜子挥发油化学成分9个、相关靶点151个,与抑菌的共有靶点54个,参与癌症的途径、IL-17信号通路等信号通路;分子对接结果显示核心成分7,8-环氧-α-紫罗兰酮与PTGS2、thymol与ALB有较高的结合活性。结论:大果木姜子挥发油可能通过7,8-环氧-α-紫罗兰酮、百里香酚等成分与靶点结合,参与癌症、炎症等相关信号通路起到抑菌作用。

关键词：大果木姜子抑菌网络药理学作用机制

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基于改进u2Net的金属棒材划痕缺陷检测

组合机床与自动化加工技术 2024年第3期 157-160,167页

作者：武志辉兰媛李利娜熊晓燕乔葳王炜博太原理工大学机械与运载工程学院太原030024 太原理工大学新型传感器与智能控制教育部重点实验室太原030024

针对金属棒材圆弧表面在光照条件下产生高光,易掩盖划痕信息的问题,设计了在多种照明条件下多种曲度棒材的缺陷数据采集实验,以增加样本的多样性和模型的泛化性;针对金属棒材表面划痕的检测问题,提出了一种改进的u2Net的缺陷分割方法,... 详细信息

针对金属棒材圆弧表面在光照条件下产生高光,易掩盖划痕信息的问题,设计了在多种照明条件下多种曲度棒材的缺陷数据采集实验,以增加样本的多样性和模型的泛化性;针对金属棒材表面划痕的检测问题,提出了一种改进的u2Net的缺陷分割方法,调整了残差模块(residual u blocks, RSu)的混合膨胀卷积的膨胀因子,并在全部RSu的最后一层增加了坐标注意力机制(coordinate attention, CA),缓解了原网络在编码和解码过程中各残差块的影响,提升了模型对划痕的检测效果。实验表明,改进u2Net网络与u2Net网络对比,准确率与召回率的综合评价指标由86.4%上升到了88.5%。

关键词：划痕检测深度学习 u2Net 坐标注意力机制

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添加江蓠对酱油制曲及成曲品质的影响

食品与发酵工业 2024年第10期50卷 40-47页

作者：王丽娜汪卓高原林淑琼张杰良李瑞陈建平宋兵兵钟赛意广东海洋大学食品科技学院广东省水产品加工与安全重点实验室广东省海洋食品工程技术研究中心广东省亚热带果蔬加工科技创新中心广东湛江524088

为挖掘可食用海藻在传统发酵食品中的应用潜力,以江蓠为研究对象,采用响应面法优化江蓠制曲工艺,探究添加江蓠对制曲过程中孢子数量、酶系活力、固形物含量变化的影响,并进一步采用气相色谱-离子迁移谱结合主成分分析的方法,对传统酱油... 详细信息

为挖掘可食用海藻在传统发酵食品中的应用潜力,以江蓠为研究对象,采用响应面法优化江蓠制曲工艺,探究添加江蓠对制曲过程中孢子数量、酶系活力、固形物含量变化的影响,并进一步采用气相色谱-离子迁移谱结合主成分分析的方法,对传统酱油成曲和江蓠成曲挥发性风味物质进行分析。结果表明,江蓠成曲最佳工艺条件为制曲时间86 h、米曲霉∶黑曲霉为1∶3(体积比),霉菌接种量为4.3%,黄豆粉∶面粉∶江蓠为5∶2∶2.5(质量比),在此条件下酸性蛋白酶活力为2956.86 u/g干基,糖化酶活力为3082.80 u/g干基。江蓠成曲中的酸性蛋白酶、糖化酶、淀粉酶、氨肽酶、纤维素酶活力及孢子数量均高于传统酱油成曲,其固形物含量低于酱油成曲;传统酱油成曲和江蓠成曲共鉴定出24种风味物质,添加江蓠会影响酱油成曲的挥发性风味物质种类和含量,其中醇类、酮类、酯类、醛类等物质对江蓠成曲风味贡献较大。气相迁移谱结合主成分分析可以较好地区分传统酱油成曲和江蓠成曲的主要风味物质差异。综上,在制曲过程中添加江蓠,可显著提高其酶系活力,并赋予体系不同风味物质,表明以江蓠为发酵基料具有酿造酱油的潜力,并为海藻资源的高值化利用和丰富酱油产品种类提供理论参考。

关键词：江蓠酱油成曲响应面酶活力品质风味

Sulfur-deficient CoNi_(2)S_(4)nanoparticles-anchored porous carbon nanofibers as bifunctional electrocatalyst for overall water splitting

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Frontiers of Chemical Science and Engineering 2023年第11期17卷 1707-1717页

作者： Gaohui Du Yi Fan lina Jia Yunting Wang Yawen Hao Wenqi Zhao Qingmei Su Bingshe Xu Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030000China Materials Institute of Atomic and Molecular Science Shaanxi University of Science and TechnologyXi’an 710021China

Water electrolysis technology is considered to be one of the most promising means to produce ***,aiming at the problems of high overpotential and slow kinetics in water splitting,N-doped porous carbon nanofibers-coupled CoNi_(2)S_(4)nanoparticles are prepared as bifunctional *** the strategy,NaCl is used as the template to prepare porous carbon nanofibers with a large surface area,and sulfur vacancies are created to modulate the electronic structure of CoNi_(2)S_(4).Electron spin resonance confirms the formation of abundant sulfur vacancies,which largely reduce the bandgap of CoNi_(2)S_(4)from 1.68 to 0.52 *** narrowed bandgap is conducive to the migration of valence electrons and decreases the charge transfer resistance for electrocatalytic ***,the uniform distribution of CoNi_(2)S_(4)nanoparticles on carbon nanofibers can prevent the aggregation and facilitate the exposure of electrochemical active ***,the composite catalyst exhibits low overpotentials of 340 mV@100 mA·cm^(-2)for oxygen evolution reaction and 380 mV@100 mA·cm^(-2)for hydrogen evolution *** assembled electrolyzer requires 1.64 V to achieve 10 mA·cm^(-2)for overall water-splitting with good long-term *** excellent performance results from the synergistic effect of porous structures,sulfur deficiency,nitrogen doping,and the well-dispersed active component.

关键词： nanoparticle sulfur vacancy porous carbon nanofiber transition metal sulfides electrolysis

Si_(3)N_(4)nanowires@pyrolytic carbon nanolayers coupled withhydroxyapatite nanosheets as reinforcement for carbon matrixcomposites with boosting mechanical and friction properties

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Journal of Materiomics 2023年第1期9卷 197-205页

作者： lina Sun Leilei Zhang Xuemin Yin Yeye Liu Yao Guo Hongchao Sheng Xianghui Hou State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of Fiber Reinforced Light Composite MaterialsNorthwestern PolytechnicalUniversityXi'an710072China Department of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang212003China Faculty of Engineering The University of NottinghamUniversity ParkNottinghamNG72RDUnited Kingdom

Extensive attention has been drawn to the development of carbon-matrix composites for application in the aerospace and military industry,where a combination of high mechanical strength and excellent frictional properties are ***,carbon-matrix composites reinforced by Si_(3)N_(4)nanowires@pyrolytic carbon nanolayers(Si_(3)N_(4nws)@PyCnls)coupled with hydroxyapatite nanosheets is *** Si_(3)N_(4nws)@PyCnls(SP)with coaxial structure could increase the surface roughness of Si_(3)N_(4nws)and promote the stress transfer to the carbon matrix,whereas the porous hydroxyapatite nanosheets favor the infiltration of the carbon matrix and promote the interfacial bonding between the SP and carbon *** carbon matrix composites reinforced by SP coupled with hydroxyapatite nanosheets(Si_(3)N_(4nws)@PyCnls-HA-C)exhibit excellent mechanical *** with the conventional Si_(3)N_(4nws)reinforced carbon composites,Si_(3)N_(4nws)@PyCnls-HA-C(SPHC)have 162%and 249%improvement in flexural strength and elastic modulus,***,the friction coefficient and wear rate decreased by 53%and 23%,*** study provides a co-reinforcement strategy generated by SP coupled with hydroxyapatite nanosheets for effective improvement of mechanical and frictional properties of carbon matrix composites that are used for aerospace and military industry applications.

关键词： Silicon nitride nanowire Coaxial structure Hydroxyapatite nanosheet Mechanical strength Friction performance Carbon matrix composites

线上线下混合模式下问题导向式教学资源建设和应用——以“海洋技术导论”课程为例

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军事高等教育研究 2024年第1期47卷 93-97页

作者：陈伟马丽娜卞玉洁陈羽朱靖国防科技大学气象海洋学院湖南长沙410073

以海洋技术专业本科课程“海洋技术导论”为例,详细阐述了线上线下混合教学模式下课程教学资源的建设和应用。以学生融会贯通能力欠缺、学习效率不高、能力训练手段缺乏三大痛点问题为导向,建设了线上和线下理论教学资源、线上虚拟平台... 详细信息

以海洋技术专业本科课程“海洋技术导论”为例,详细阐述了线上线下混合教学模式下课程教学资源的建设和应用。以学生融会贯通能力欠缺、学习效率不高、能力训练手段缺乏三大痛点问题为导向,建设了线上和线下理论教学资源、线上虚拟平台、线下实践基地等线上线下融合式和虚拟实操孪生式教学资源。在教学资源应用上,突出以学生为中心和以教学目标为导向两个特点,结合课程的完整流程阐述了课程教学资源的总体使用方式。

关键词：教学资源问题导向线上线下混合本科专业课程海洋技术

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关于一些特殊图类的弱控制多项式的研究

四川师范大学学报（自然科学版） 2024年第1期47卷 60-66页

作者：刘慧灵边红于海征魏丽娜新疆师范大学数学科学学院新疆乌鲁木齐830054 新疆大学数学与系统科学学院新疆乌鲁木齐830046

研究一些特殊图类的弱控制多项式.令图G=(V(G),E(G))是一个简单连通图,若对任意v∈V(G),存在u∈V(G),使得uv∈E(G)且d(u)≥d(v)成立,则称v弱控制u.设W(G)?V(G),如果对任意u∈V(G)W(G),存在v∈W(G),使得v弱控制u,则称W(G)为图G的一个弱... 详细信息

研究一些特殊图类的弱控制多项式.令图G=(V(G),E(G))是一个简单连通图,若对任意v∈V(G),存在u∈V(G),使得uv∈E(G)且d(u)≥d(v)成立,则称v弱控制u.设W(G)?V(G),如果对任意u∈V(G)W(G),存在v∈W(G),使得v弱控制u,则称W(G)为图G的一个弱控制集.含点数最少的弱控制集称为最小弱控制集,最小弱控制集中所包含点的个数称为图G的弱控制数,记为γwd(G).图G的弱控制多项式为WD(G,x)=nΣj=γwd(G)Wd(G,j)x印j,其中Wd(G,j)表示图G中阶为j的弱控制集的个数.

关键词：控制集弱控制集弱控制数控制多项式弱控制多项式

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