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Insights into Nano-and Micro-Structured Scaffolds for Advanced Electrochemical Energy Storage

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Nano-Micro Letters 2024年第7期16卷 187-230页

作者： jiajia Qiu Yu duan Shaoyuan Li Huaping Zhao Wenhui Ma Weidong Shi Yong Lei Fachgebiet Angewandte Nanophysik Institut Für Physik and IMN MacroNanoTechnische Universit.t Ilmenau98693 IlmenauGermany Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093People’s Republic of China School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 212013People’s Republic of China School of Science and Technology Pu’er UniversityPu’er 665000People’s Republic of China

Adopting a nano-and micro-structuring approach to fully unleashing the genuine potential of electrode active material benefits in-depth understandings and research progress toward higher energy density electrochemical energy stor-age devices at all technology readiness levels.Due to various challenging issues,especially limited stability,nano-and micro-structured(NMS)electrodes undergo fast electrochemical performance degradation.The emerging NMS scaffold design is a pivotal aspect of many electrodes as it endows them with both robustness and electrochemical performance enhancement,even though it only occupies comple-mentary and facilitating components for the main mechanism.However,extensive efforts are urgently needed toward optimizing the stereoscopic geometrical design of NMS scaffolds to minimize the volume ratio and maximize their functionality to fulfill the ever-increasing dependency and desire for energy power source supplies.This review will aim at highlighting these NMS scaffold design strategies,summariz-ing their corresponding strengths and challenges,and thereby outlining the potential solutions to resolve these challenges,design principles,and key perspectives for future research in this field.Therefore,this review will be one of the earliest reviews from this viewpoint.

关键词： Nano-and micro-structured Interconnected porous Scaffolds Electrode design Electrochemical energy storage

Landscape ecological risk assessment and its driving factors in the Weihe River basin,China

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Journal of Arid Land 2024年第5期16卷 603-614页

作者： CHANG Sen WEI Yaqi DAI Zhenzhong XU Wen WANG Xing duan jiajia ZOU Liang ZHAO Guorong REN Xiaoying FENG Yongzhong College of Agronomy Northwest A&F UniversityYangling 712100China

Weihe River basin is of great significance to analyze the changes of land use pattern and landscape ecological risk and to improve the ecological basis of regional development.Based on land use data of the Weihe River basin in 2000,2010,and 2020,with the support of Aeronautical Reconnaissance Coverage Geographic Information System(ArcGIS),GeoDa,and other technologies,this study analyzed the spatial-temporal characteristics and driving factors of land use pattern and landscape ecological risk.Results showed that land use structure of the Weihe River basin has changed significantly,with the decrease of cropland and the increase of forest land and construction land.In the past 20 a,cropland has decreased by 7347.70 km2,and cropland was mainly converted into forest land,grassland,and construction land.The fragmentation and dispersion of ecological landscape pattern in the Weihe River basin were improved,and land use pattern became more concentrated.Meanwhile,landscape ecological risk of the Weihe River basin has been improved.Severe landscape ecological risk area decreased by 19,177.87 km2,high landscape ecological risk area decreased by 3904.35 km2,and moderate and low landscape ecological risk areas continued to increase.It is worth noting that landscape ecological risks in the upper reaches of the Weihe River basin are still relatively serious,especially in the contiguous areas of high ecological risk,such as Tianshui,Pingliang,Dingxi areas and some areas of Ningxia Hui Autonomous Region.Landscape ecological risk showed obvious spatial dependence,and high ecological risk area was concentrated.Among the driving factors,population density,precipitation,normalized difference vegetation index(NDVI),and their interactions are the most important factors affecting the landscape ecological risk of the Weihe River basin.The findings significantly contribute to our understanding of the ecological dynamics in the Weihe River basin,providing crucial insights for sustainable management in the region.

关键词： land use ecological risk spatiotemporal distribution geographic detector driving factors

Seeking sustainable solutions for human food systems

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Geography and Sustainability 2023年第3期4卷 183-187页

作者： Zhiyuan Zhu jiajia duan Zhenzhong Dai Yongzhong Feng Gaihe Yang College of Agronomy Northwest A&F UniversityYangling 712100China College of Rural Revitalization Northwest A&F UniversityYangling 712100China

Sustainable food system development is the cornerstone of global human survival and development.This research briefly analyzes the challenges facing the current food system,summarizes the directions of food system trans-formation,expounds the role of geography in the transformation of food system,and discusses the future paths to promote the sustainable development of food system.The main conclusions are as follows:1)The interaction of factors such as regional conflicts,climate change,slowdown in development,raging epidemics,and resource and environmental constraints pose multiple challenges to the global food system.2)The food system should be high-quality,efficient,nutritious and healthy,green and low-carbon,inclusive and inclusive transformation.3)Geography can provide solutions for the transformation of food systems.4)The transformation paths of the food system includes:establishing a global food system with benefit sharing,cleaner production,and fair participation,improving the innovation capability of the food system,and establishing an effective organizational guarantee system.

关键词： Food systems Sustainable development Solutions

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基于YOLOv7的道路标识符检测

激光杂志 2024年第6期45卷 82-87页

作者：吴肖刘佳佳段平李佳云南师范大学地理学部昆明650500 中国能源建设集团云南省电力设计院有限公司昆明650000

面对复杂道路交通场景,智能、快速、准确地检测道路标识符对自动驾驶技术具有重要的意义。YOLOv7算法检测速度快、准确率高,适用于实时复杂的道路标识符检测。中国交通标志检测数据集对YOLOv7模型进行训练,选取了普通、有遮挡和模糊三... 详细信息

面对复杂道路交通场景,智能、快速、准确地检测道路标识符对自动驾驶技术具有重要的意义。YOLOv7算法检测速度快、准确率高,适用于实时复杂的道路标识符检测。中国交通标志检测数据集对YOLOv7模型进行训练,选取了普通、有遮挡和模糊三种不同的道路交通场景图像测试训练模型,并与CenterNet、Faster R-CNN和SSD三种流行的目标检测算法进行对比分析。结果显示,YOLOv7算法检测速度快,平均精度最高,m AP达到89.7%,且在三种场景的图片测试中性能表现最好,即使在存在遮挡和模糊的情况下仍然能够成功检测出图像中的道路标识物目标。

关键词：深度学习目标检测 YOLOv7 道路标识符识别

卡瑞利珠单抗联合XELOX方案治疗晚期结肠癌的临床研究

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现代药物与临床 2024年第4期39卷 1023-1027页

作者：段梅梅张耀晴付佳佳华中科技大学协和京山医院/京山市人民医院肿瘤科湖北荆门431899 华中科技大学协和京山医院/京山市人民医院普外科湖北荆门431899

目的探讨卡瑞利珠单抗联合XELOX方案治疗晚期结肠癌的临床疗效。方法选取2021年1月—2023年1月京山市人民医院收治的94例结肠癌患者,随机分为对照组(47例)和治疗组(47例)。对照组患者采用XELOX方案治疗,第1天静脉滴注注射用奥沙利铂,130... 详细信息

目的探讨卡瑞利珠单抗联合XELOX方案治疗晚期结肠癌的临床疗效。方法选取2021年1月—2023年1月京山市人民医院收治的94例结肠癌患者,随机分为对照组(47例)和治疗组(47例)。对照组患者采用XELOX方案治疗,第1天静脉滴注注射用奥沙利铂,130mg/m^(2);第1~14天早、晚餐后口服卡培他滨片,1000mg/m^(2),2次/d。治疗组在对照组基础上静脉滴注注射用卡瑞利珠单抗,200mg/次,1次/3周,滴注2次。两组患者均治疗6周。观察两组患者临床疗效,比较治疗前后两组患者血清大肠特异性抗原-2(CCSA-2)、癌胚抗原(CEA)、糖类抗原19-9(CA19-9)、血管内皮生长因子(VEGF-A)、VEGF受体2(VEGFR2)及生活质量核心量表(QLQ-C30)评分。结果治疗后,治疗组疾病控制率为80.85%,较对照组的61.70%明显升高(P<0.05)。治疗后,两组患者血清CCSA-2、CEA、CA19-9、VEGF-A、VEGFR2水平均较治疗前明显降低(P<0.05),且治疗组较对照组下降更显著(P<0.05)。治疗后,两组患者QLQ-C30评分均较治疗前明显升高(P<0.05),且治疗组较对照组升高更显著(P<0.05)。结论卡瑞利珠单抗联合XELOX方案可有效改善晚期结肠癌患者血清中异常肿瘤标志物及VEGF-A、VEGFR2等血管生长因子水平,提高生活质量,疗效显著。

关键词：注射用卡瑞利珠单抗注射用奥沙利铂卡培他滨片 XELOX方案结肠癌癌胚抗原糖类抗原19-9 血管内皮生长因子生活质量核心量表

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智能铁路5G安全技术与策略综述

计算机科学 2024年第5期51卷 1-11页

作者：李盼盼吴昊刘佳佳段莉卢云龙北京交通大学先进轨道交通自主运行全国重点实验室北京100044 北京交通大学电子信息工程学院北京100044 北京交通大学智慧高铁系统前沿科学中心北京100044 北京交通大学计算机与信息技术学院北京100044

数字技术正在重塑各行各业,这是行业发展的必经之路。5G等数字服务技术在为铁路等行业赋能的同时,也带来了一些安全风险。安全是一切服务的先决条件。为促进5G数字服务在智能铁路的创新应用,首先从基站空口、通信、数据、系统、终端和... 详细信息

数字技术正在重塑各行各业,这是行业发展的必经之路。5G等数字服务技术在为铁路等行业赋能的同时,也带来了一些安全风险。安全是一切服务的先决条件。为促进5G数字服务在智能铁路的创新应用,首先从基站空口、通信、数据、系统、终端和公专网融合应用几个角度,系统梳理了智能铁路5G通信网络面临的安全风险与挑战。然后针对大带宽、高可靠、低时延的新业务场景及网络切片、边缘计算等新技术和大规模异构新型终端以及面向铁路的智能新应用,全面分析了智能铁路5G服务的安全新需求,总结了密码算法、空口安全、隐私、统一认证及漫游等方面的5G安全增强新特性。在此基础上,给出智能铁路5G通信网络在安全认证、物理层安全、终端安全、切片安全、边缘计算安全方面需关注的重点。针对5G专网部署方式,给出基础设施、通信安全、安全管理数据安全、内生安全防御体系方面的建议。

关键词：智能铁路第5代移动通信系统(5G) 内生安全策略综述数字服务

Versatile Inorganic Oligomer-based Photochromic Spiropyrane Gels

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Chinese Journal of Structural Chemistry 2022年第5期41卷 37-47页

作者： jiajia Song Wei duan Yun Chen Xiangyang Liu State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China College of Ocean and Earth Sciences College of MaterialsCollege of Physical Science and TechnologyState Key Laboratory of Marine Environmental Science(MEL)Research Institute for Biomimetics and Soft MatterXiamen UniversityXiamen 361005China Department of Physics National University of Singapore2 Science Drive 3Singapore 117542Singapore

Here we report an example of a general strategy for the immobilization of various different photochromic spiropyran molecules on eco-friendly cheap nanomatrix.The spiropyrans are encapsulated in calcium salt oligomers-based gels by centrifugation,forming an inorganic oligomer-based gelatinous photoswitchable hybrid material.Ca^(2+)is also used to regulate the optical properties of spiropyrans through chelation.The oligomer-based gel can not only provide the space required for photoisomerization,but also reduce the interference of the surrounding environment on the photochromic properties.Moreover,a practical paper-based and colloidal flexible substrate platform is constructed for the removal and naked-eye detection of liquid and gaseous hydrazine at room temperature based on the reactivity of the formyl group on spiro-pyrans loaded in Ca3(PO4)2 oligomers.This general strategy can be used for other inorganic oligomer-based molecular switches and sensing systems.

关键词： inorganic oligomer photochromic gels naked-eye detection of hydrazine

粤东连平—河源—汕尾地震测深剖面地壳速度结构及其意义

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地球物理学报 2024年第6期67卷 2304-2321页

作者：叶秀薇吕作勇王亮宋佳佳段永红王帅军宋向辉郑金宝皮伟广东省地震局(中国地震局地震监测与减灾技术重点实验室广东省地震预警与重大工程安全诊断重点实验室)广州510070 中国地震局地球物理勘探中心郑州450002 河南省地球物理空间信息研究院河南省地质物探工程技术研究中心郑州450004

为适应防灾减灾工作的需要,广东省地震局联合中国地震局地球物理勘探中心、河南省地球物理空间信息研究院于2021年在粤东地区实施了人工地震宽角反射/折射探测,以期获得粤东地区深部地壳速度结构.本文采用地震射线走时正演对粤东地区NW... 详细信息

为适应防灾减灾工作的需要,广东省地震局联合中国地震局地球物理勘探中心、河南省地球物理空间信息研究院于2021年在粤东地区实施了人工地震宽角反射/折射探测,以期获得粤东地区深部地壳速度结构.本文采用地震射线走时正演对粤东地区NW向连平—河源—海丰测线数据进行了处理解释,构建了该剖面的二维壳幔速度结构模型.该模型表明,沿剖面自NW向SE,莫霍面深度由32 km缓慢抬升至29 km,广州—恩平断裂带、河源—邵武断裂带和政和—大埔断裂带的对应位置都显示莫霍面有抬升现象;研究区存在多条NE向展布深大断裂;中地壳发育低速异常区域(低速体)受断裂控制,主要分布于政和—大埔断裂带NW内陆方向,可能与中生代早期岩浆活动形成的花岗岩质岩浆相关.我们认为壳内低速区域(低速体)可能是影响研究区深部孕震环境的重要因素.

关键词：华南大陆粤东地区人工地震测深壳幔精细速度结构壳内低速体

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无转速同步下叶片同步振动参数辨识误差修正

传感技术学报 2024年第6期37卷 1005-1013页

作者：郭沛铉牛广越傅骁段发阶支烽耀吴靓昕蒋佳佳天津大学精密测试技术及仪器全国重点实验室天津300072 中国航发湖南动力机械研究所湖南株洲412002

叶片振动非接触在线测量是保障大型旋转机械健康高效运行的重要环节,振动参数的精确辨识是叶片振动高精度测量的关键。无转速同步下,传统基于叶尖定时的叶片同步振动参数辨识方法忽略了叶片振动带来的时间误差,直接影响了参数辨识精度... 详细信息

叶片振动非接触在线测量是保障大型旋转机械健康高效运行的重要环节,振动参数的精确辨识是叶片振动高精度测量的关键。无转速同步下,传统基于叶尖定时的叶片同步振动参数辨识方法忽略了叶片振动带来的时间误差,直接影响了参数辨识精度。为修正无转速同步下的叶片同步振动周向傅里叶拟合误差,提出了一种改进的叶片同步振动参数高精度辨识方法。利用叶片振动角位移,修正叶片到达时刻,优化传感器之间的振动位移差测量模型,提高了叶片振动幅值及振动倍频的辨识精度。开展了仿真和实验验证,二者结果一致性良好,在振动倍频值10、6、5处,改进方法与传统方法相比,信号恢复精度分别提高11.79μm、5.21μm、3.26μm,所提方法具有良好的误差修正效果。

关键词：叶尖定时叶片振动转速同步误差修正参数辨识