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Self-supporting nanoporous gold-palladium overlayer bifunctional catalysts toward oxygen reduction and evolution reactions

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Nano Research 2016年第12期9卷 3781-3794页

作者： yan Wang Wei Huang Conghui Si Jie Zhang xuejiao yan Chuanhong Jin Yi Ding Zhonghua Zhang School of Materials Science and Engineering University of Jinan 336 West Road of Nan Xinzhuang Jinan 250022 China State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and School of Materials Science and Engineering Zhejiang University Hangzhou Hangzhou 310027 China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education) School of Materials Science and Engineering Shandong University Jingshi Road 17923 Jinan 25006 1 China School of Materials Science and Engineering Tianjin University of Technology 391 BinshuiXidao Xiqing District Tianjin 300384 China

The oxygen reduction reaction （ORR） and oxygen evolution reaction （OER） are crucial processes for energy conversion/storage systems, such as fuel cells, metal-air batteries, and water splitting. However, both reactions are severely restricted by their sluggish kinetics, thus requiring highly active, cost-effective, and durable electrocatalysts. Herein, we develop novel bifunctional nanocatalysts through surface nanoengineering of dealloying-driven nanoporous gold （NPG）. Pd overlayers were precisely deposited onto the NPG ligament surface by epitaxial layer-by-layer growth. More importantly, the obtained NPG-Pd overlayer nanocatalysts exhibit remarkably enhanced electrocatalytic activities toward both the ORR and OER in alkaline media, benchmarked against a state- of-the-art Pt/C catalyst. The improved electrocatalytic performance is rationalized by the unique three-dimensional nanoarchitecture of NPG, enhanced Pd utilization efficiency from precise control of the Pd overlayers, and change in electronic structure, as revealed by density functional theory calculations.

关键词： oxygen reduction reaction oxygen evolution reaction nanoporous gold Pd overlayer density functional theory

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Super-sensitive bifunctional nanoprobe: Self-assembly of peptide-driven nanoparticles demonstrating tumor fluorescence imaging and therapy

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Acta Pharmaceutica Sinica B 2022年第3期12卷 1473-1486页

作者： Han Xiao Rui Zhang Xiaobo Fan Xinglu Jiang Mingyuan Zou xuejiao yan Haiping Hao Guoqiu Wu Medical School Southeast UniversityNanjing 210009China Department of Clinical Laboratory the Fifth Affiliated Hospital of Sun Yat-sen UniversityNanjing 210009China Department of Cardiology the Affiliated Changzhou No.2 People’s Hospital of Nanjing Medical UniversityNanjing 210009China State Key Laboratory of Natural Medicines Key Lab of Drug Metabolism and PharmacokineticsChina Pharmaceutical UniversityZhuhai 519000China Center of Clinical Laboratory Medicine Zhongda HospitalSoutheast UniversityNanjing 21009China Jiangsu Provincial Key Laboratory of Critical Care Medicine Southeast UniversityChangzhou 213000China

The development of nanomedicine has recently achieved several breakthroughs in the field of cancer treatment;however,biocompatibility and targeted penetration of these nanomaterials remain as limitations,which lead to serious side effects and significantly narrow the scope of their *** self-assembly of intermediate filaments with arginine-glycine-aspartate(RGD)peptide(RGDIFP)was triggered by the hydrophobic cationic molecule 7-amino actinomycin D(7-AAD)to synthesize a bifunctional nanoparticle that could serve as a fluorescent imaging probe to visualize tumor *** designed RGD-IFP peptide possessed the ability to encapsulate 7-AAD molecules through the formation of hydrogen bonds and hydrophobic interactions by a one-step *** fluorescent nanoprobe with RGD peptide could be targeted for delivery into tumor cells and released in acidic environments such as endosomes/lysosomes,ultimately inducing cytotoxicity by arresting tumor cell cycling with inserted *** is noteworthy that the RGD-IFP/7-AAD nanoprobe tail-vein injection approach demonstrated not only high tumor-targeted imaging potential,but also potent antitumor therapeutic effects in *** proposed strategy may be used in peptide-driven bifunctional nanoparticles for precise imaging and cancer therapy.

关键词： Nanoprobe 7-Amino actinomycin D Intermediate filament protein Tumor image Antitumor therapy Integrin avβ3

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Doppler Radar Fault Judgment System and Remote Monitoring Platform

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Meteorological and Environmental Research 2023年第4期14卷 32-33页

作者： Yi ZHANG xuejiao yan Nanchang Meteorological Bureau Nanchang 330039China

The Doppler weather radar fault judging system and remote monitoring platform were *** the real-time scanning of radar alarm information coding,the platform can realize dynamic monitoring and real-time alarm of Doppler radar equipment components,so as to improve the reliability of equipment operation,and truly realize"unattended"remote monitoring.

关键词： Doppler radar Alarm information Remote monitoring

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Vision-based Global Localization of Unmanned Aerial Vehicles with Street View Images

Vision-based Global Localization of Unmanned Aerial Vehicles...

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第37届中国控制会议

作者： xuejiao yan Zongying Shi Yisheng Zhong Department of Automation Tsinghua University

In this paper, a vision-based method is proposed to globally localize an unmanned aerial vehicle（UAV） flying in the urban scenarios using Google Street View as prior information. Since the trajectory of the UAV with absolute scale cannot be recovered with the help of monocular visual odometry only, we leverage the known positional information of Google Street View to localize vehicles with respect to the surrounding buildings. First, a place recognition algorithm is presented to solve air-ground matching problem by searching aerial images taken from onboard camera within the geotagged image database. Then based on the matched images by place recognition and tracked features via visual odometry, a novel absolute scale estimation mechanism is proposed to estimate the pose of UAV in the real world coordinate system and to correct the scale drift of visual odometry. Furthermore, the pose graph with UAV’s poses as vertexes and relative transformations as edges is optimized with SE（3） constraints to get trajectory of UAV in the real world coordinate system. Experiments are conducted on a 2km dataset recorded onboard by a camera-equipped UAV flying in the urban streets of Zurich, Switzerland, and the results show that our method is able to metrically localize the UAV without previously visiting or building 3D models in advance.

关键词： Vision-based localization unmanned aerial vehicle Google Street View absolute scale estimation

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我国企业海外投资应对政治风险的若干对策

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开放导报 2012年第2期 48-51页

作者：鄢雪皎上海工程技术大学管理学院上海201620

自2008年金融危机之后,我国企业进军海外投资不仅要面临来自市场的各类风险,同时也不断遭遇各种政治风险。了解、关注、分析我国企业"走出去"、进军海外投资过程中面临的各类政治风险,制定正确的应对防范对策很有必要。

关键词：海外投资政治风险国际市场对策

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国内奢侈品品牌的未来发展方向和营销对策

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改革与战略 2009年第2期25卷 54-56页

作者：鄢雪皎上海工程技术大学管理学院上海200336

文章主要介绍了奢侈品品牌的概念与特点,进而分析奢侈品品牌的发展规律和国内奢侈品品牌未来的发展方向,对发展国内奢侈品品牌以及营销提出了对策建议。

关键词：奢侈品品牌品牌战略营销策略

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Inertial Positioning Technology and Caliper Inspection Based Pipeline Deformation Detection

Inertial Positioning Technology and Caliper Inspection Based...

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第40届中国控制会议

作者： Hua SONG Huiyin HUANG yan yanG Xun WU xuejiao yan Zhe XIE Chuangrong YIN Guanhao CHEN School of Automation Science and Electrical Engineering Beihang University Dongguan Power Supply Bureau of Guangdong Power Grid Co. Ltd Institute of Aerospace System Engineering

The detection and positioning of pipeline deformation is of great significance to improve the efficiency and ensure the safety of pipeline operation. In this paper, the caliper inspection is used to obtain the geometric information of pipeline deformation, and the inertial positioning technology is used to obtain the geographic and circumferential information of deformation, and finally forms a three-dimensional model of pipeline deformation, according to which the geometric characteristics of deformation are analyzed and then provides the basis for pipeline maintenance. In order to verify the effectiveness of the method, a prototype of pipeline deformation detection principle has been designed and the towing experiment has also carried out. The experimental results showed that the prototype can effectively detect and locate the convex deformation and circumferential weld of the pipeline.

关键词： Underground pipeline Deformation detection Inertial Navigation Oil and gas pipeline 3D information Caliper inspection

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不同规模耕地经济效益差异及影响因素分析——以曲周县第四疃乡为例

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中国农业大学学报 2017年第4期22卷 81-90页

作者：董雪娇徐艳周建中国农业大学资源与环境学院北京100193 国土资源部农用地质量与监控重点实验室北京100193

为研究不同规模耕地的经济效益差异及影响耕地经济效益的因素,以曲周县第四疃乡农户调查问卷为基础,利用Stata 12.0逐步回归分析方法,从农户微观视角分析不同农户耕地经济效益的差异及影响效益产生差异的原因。结果表明:耕地规模大的分... 详细信息

为研究不同规模耕地的经济效益差异及影响耕地经济效益的因素,以曲周县第四疃乡农户调查问卷为基础,利用Stata 12.0逐步回归分析方法,从农户微观视角分析不同农户耕地经济效益的差异及影响效益产生差异的原因。结果表明:耕地规模大的分组中农户耕地经济效益较高;耕地经济效益与耕地块均面积、机械拥有量呈显著正相关关系;与家庭主要劳动力年龄呈显著负相关关系;与务农人口数没有明显相关关系;地块规则成方、加入合作社等新型组织或自成种粮大户均有利于提高耕地经济效益。据此提出解放劳动力、实施土地整治、扶持农村合作社、推动土地流转等提高耕地经济效益等建议。

关键词：耕地经济效益耕地规模影响因素逐步回归分析

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A Comprehensive Evaluation Method for Manned Lunar Exploration Activities

A Comprehensive Evaluation Method for Manned Lunar Explorati...

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第43届中国控制会议

作者： xuejiao yan Chenyue Zhang Weiyang Xu Jiajun Yuan Yu Zhang Shaohua Bu Feizhou Shi Chongfeng Zhang Aerospace System Engineering Shanghai Shanghai Academy of Spaceflight Technology

Manned lunar exploration is an important way for human to develop the moon and go to deep space, which has important strategic, scientific and engineering significance. Due to the limited time and resources of manned lunar exploration mission, it is necessary to evaluate the arrangement result of missions through a set of systematic and scientific methods in order to ensure human safety and maximize mission efficiency. According to the design principles of manned lunar exploration activities, a comprehensive evaluation method is proposed in this paper. The evaluation model and quantitative indicators are constructed from three aspects: feasibility, risk and mission effectiveness of the plan, so as to evaluate and weigh the plans comprehensively. This paper verifies the effectiveness of the method by constructing a comparison case. The verification results show that the method is comprehensive and easy to understand, which can provide a basis for the final decision maker to weigh different plans, and play an important role in the optimization and iteration of manned lunar exploration activity plan arrangement.

关键词： Lunar activities Manned lunar exploration Mission plan evaluation Comprehensive evaluation method

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大管径长输热网特殊节点处理及保温管道设计

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粘接 2023年第7期50卷 194-196页

作者：闫雪娇北京昌华勘查设计有限公司北京100043

以某长输供热管网工程为主要研究对象,分析长输热网特殊节点处理和保温管道设计,管道特殊节点主要包括河流节点、穿越城市道路、铁路等环境;而保温管道设计主要有外保护层、保温层制造工艺选择、壁厚选型、工作管钢材选型等环节组成。... 详细信息

以某长输供热管网工程为主要研究对象,分析长输热网特殊节点处理和保温管道设计,管道特殊节点主要包括河流节点、穿越城市道路、铁路等环境;而保温管道设计主要有外保护层、保温层制造工艺选择、壁厚选型、工作管钢材选型等环节组成。基于此,合理控制管道材料、钢管壁厚、应力计算等,增加管道的保温性能。试验表明:当管道材料高于DN250、敷设方式选择直埋方式时,能有效控制钢板滑动支架和阀门表面温度,延长管道使用年限。

关键词：长输热网穿越工作管外护层保温结构

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