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Divalent anion intercalation and etching-hydrolysis strategies to construct ultra-stable electrodes for seawater splitting

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Science China Chemistry 2024年第2期67卷 687-695页

作者： jiajia lu Yang Liu Han-Pu Liang Key Laboratory of Biofuels Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao266101China Henan Provincial Key Laboratory of Nanocomposites and Applications Institute of Nano-Structured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou450006China School of Materials Science and Engineering Henan Normal UniversityXinxiang453007China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Shandong Energy Institute Qingdao266101China

Developing stable electrodes for seawater splitting remains a great challenge due to the detachment of catalysts at a large operating current and severe anode corrosion caused by ***,divalent anion intercalation and etching-hydrolysis strategies are deployed to synthesize the ultra-stable anode,dendritic Fe(OH)_(3) grown on Ni(SO_4)_(0.3)(OH)_(1.4)–Ni(OH)_(2).Experimental results reveal that the anode exhibits good activity and excellent stability in alkaline simulated *** 500 h,the current density operated at 1.72 V remains 99.5%,about 210 m A cm^(-2).The outstanding stability originates from the etchinghydrolysis strategy,which strengthens the interaction between the catalyst and the carrier and retards thus the detachment of catalysts at a large current ***,theoretical simulations confirm that the intercalated divalent anions,such as SO_4^(2-) and CO_(3)^(2-),can weaken the adsorption strength of chlorine on the surface of catalysts and hinder the coupling and hybridization between chlorine and nickel,which slows down the anode corrosion and improves catalytic ***,the twoelectrode system shows the remarkable 95.1% energy efficiency at 2,000 A m-2and outstanding stability in 6 mol L^(-1) KOH +seawater at 80 ℃.

关键词： seawater splitting stability divalent anion intercalation etching-hydrolysis

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Patterning single-layer materials by electrical breakdown using atomic force microscopy

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Nanotechnology and Precision Engineering 2024年第1期7卷 71-77页

作者： Yajie Yang jiajia lu Yanbo Xie Libing Duan School of Physical Science and Technology Northwestern Polytechnical UniversityXi’an 710072China School of Aeronautics and Institute of Extreme Mechanics Northwestern Polytechnical UniversityXi’an 710072China

The development of nanoelectronics and nanotechnologies has been boosted signiﬁcantly by the emergence of 2D materials because of their atomic thickness and peculiar properties,and developing a universal,precise patterning technology for single-layer 2D materials is critical for assembling *** here is a nanomachining technique using electrical breakdown by an AFM tip to fabricate nanopores,nanostrips,and other nanostructures on *** can be achieved by voltage scanning or applying a constant voltage while moving the *** measuring the electrical current,the formation process on single-layer materials was shown *** present results provide evidence of successful pattern fabrication on single-layer MoS2,boron nitride,and graphene,although further conﬁrmation is still *** proposed method holds promise as a general nanomachining technology for the future.

关键词： 2D material Nanopattern AFM Electrical breakdown Lithography

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Research on AGV task path planning based on improved A^(*) algorithm

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Virtual Reality & Intelligent Hardware 2023年第3期5卷 249-265页

作者： Xianwei WANG jiajia lu Fuyang KE Xun WANG Wei WANG School of Automation Nanjing University of Information Science&TechnologyNanjing 210044China School of Remote Sensing and Geomatics Nanjing University of Information Science&TechnologyNanjing 210044China School of Internet of Things Engineering Wuxi UniversityWuxi 214000China

Background Automatic guided vehicles(AGVs)have developed rapidly in recent years and have been used in several fields,including intelligent transportation,cargo assembly,military testing,and others.A key issue in these applications is path *** path planning results based on known environmental information are used as the ideal path for AGVs combined with local path planning to achieve safe and rapid arrival at the *** the global planning method,the ideal path should meet the requirements of as few turns as possible,a short planning time,and continuous path *** We propose a global path-planning method based on an improved A^(*)*** robustness of the algorithm was verified by simulation experiments in typical multiobstacle and indoor *** improve the efficiency of the path-finding time,we increase the heuristic information weight of the target location and avoid invalid cost calculations of the obstacle areas in the dynamic programming ***,the optimality of the number of turns in the path is ensured based on the turning node backtracking optimization *** the final global path needs to satisfy the AGV kinematic constraints and curvature continuity condition,we adopt a curve smoothing scheme and select the optimal result that meets the *** Simulation results show that the improved algorithm proposed in this study outperforms the traditional method and can help AGVs improve the efficiency of task execution by planning a path with low complexity and ***,this scheme provides a new solution for global path planning of unmanned vehicles.

关键词： Autonomous guided vehicle(AGV) Map modeling Global path planning Improved A^(*)algorithm Path optimization Bezier curves

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Measurement of GaAs start duration in different solution concentration using infrared images

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Chinese Science Bulletin 2008年第6期53卷 932-936页

作者： LIU Lin YE YuTang WU YunFeng FANG Liang lu jiajia School of Opto-Electronic Information University of Electronic Science and Technology of China Chengdu 610054 China

This paper proposes a new infrared method to measure the start duration of GaAs substrate in chemi- cal etching. When etching starts, the temperature of liquid-film will change because of heat release in the chemical reaction. As a result, the start duration of GaAs can be tested by collecting real-time in- frared thermal images in the course of temperature variation. Both theoretical analysis and experi- mental results show that the line shape liquid film of a 2-mm width is a good monitoring subject. By making use of the grey distribution change of a certain cross section of the line shape liquid film, the start duration of reaction between GaAs and H2SO4-H2O2-H2O is obtained. The start durations of reac- tion between GaAs substrate and H2SO4:H2O2:H2O (=5:1:50 and 15:3:50) solution are about 0.2 s and 0.3―0.4 s, respectively. This result and relative method will impulse the research of wet chemical etching technology of GaAs and so on.

关键词：红外线辐射时间实时监测液体薄膜砷化镓化学腐蚀

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MAGI1 inhibits migration and invasion via blocking MAPK/ERK signaling pathway in gastric cancer

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Chinese Journal of Cancer Research 2017年第1期29卷 25-35页

作者： Shuqin Jia jiajia lu Tingting Qu Yi Feng Xiaohong Wang Caixia Liu Jiafu Ji Laboratory of Surgery the Affiliated Hospital of Inner Mongolia Medical University Hohhot 010050 China Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing) Center for Molecular Diagnosis Peking University Cancer Hospital & InstituteBeijing 100142 China Department of Medical Oncology the Affiliated Hospital of Inner Mongolia Medical University Hohhot 010050 China Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing) Tissue Bank Peking University Cancer Hospital &Institute Beijing 100142 China Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing) Department of Gastrointestinal Surgery Peking University Cancer Hospital & Institute Beijing 100142 China

Objective： To explore the association of membrane-associated guanylate kinase inverted 1（MAGI1） with gastric cancer（GC） and the related molecular ***： The reverse transcription-polymerase chain reaction（RT-PCR） and immunohistochemistry（IHC）were utilized to measure the MAGI1 expression level in GC tissues. Quantitative real-time PCR and Western blotting were used to ensure the MAGI1 expression in GC cell lines. Small hairpin RNA（sh RNA） was applied for knockdown of endogenous MAGI1 in GC cells. MTT assay and colony formation assay, scratch wounding migration assay and transwell chamber migration assay, as well as transwell chamber invasion assay were employed respectively to investigate the GC cell proliferation, migration and invasion in MAGI1-knockdown and control GC cells. The potential molecular mechanism mediated by MAGI1 was studied using Western blotting and RT- ***： RT-PCR and IHC verified MAGI1 was frequently expressed in matched adjacent noncancerous mucosa compared with GC tissues and the expression of MAGI1 was related to clinical pathological parameters. Functional assays indicated that MAGI1 knockdown significantly promoted GC cell migration and invasion. Further mechanism investigation demonstrated that one pathway of MAGI1 inhibiting migration and invasion was mainly by altering the expression of matrix metalloproteinases（MMPs） and epithelial-mesenchymal transition（EMT）-related molecules via inhibiting MAPK/ERK signaling ***： MAGI1 was associated with GC clinical pathological parameters and acted as a tumor suppressor via inhibiting of MAPK/ERK signaling pathway in GC.

关键词： MAGI1 migration invasion MAPK/ERK MMPs EMT gastric cancer

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Enhancement of oxygen reduction activity and stability via introducing acid-resistant refractory Mo and regulating the near-surface Pt content

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Journal of Energy Chemistry 2020年第12期29卷 246-252页

作者： Shouquan Feng jiajia lu Lin luo Guangfu Qian Jinli Chen Hanna SAbbo Salam JJTitinchi Shibin Yin College of Chemistry and Chemical Enginering.School of Physical Science and Technology.Key Laboratory of New Processing Technology for Nonferrous Metals and Materials State Key Laboratory of Processing for Non Ferrous Metal and Featured MaterialsGuangxi UniversityNanning 530004.GuangxiChina Department of Chemitry University of the Western Cape7535 Cape TownSouth Africa

Although Pt Ni catalyst possesses good oxygen reduction activity, its poor stability is the main obstacle for the commercialization of proton exchange membrane fuel cells(PEMFCs). In this work, we introduce the acid-resistant refractory Mo to enhance the structure stability and modify the electronic structure of Pt in the prepared PtNi catalyst, improving the catalytic activity for oxygen reduction reaction(ORR). In addition, near-surface Pt content in the nanoparticle is also optimized to balance the ORR activity and stability. The electrochemical results show that the alloy formed by Mo and Pt Ni is obviously more stable than the PtNi alloy alone, because the acid-resistant Mo and its oxides effectively prevent the dissolution of Pt. Especially, the Pt3 Ni3 MoN/C exhibits the optimal ORR catalytic performance in O2-saturated 0.1 mol L^(-1) HClO4 aqueous solutions, with mass activity(MA) of 900 m A mg^(-1) Pt at 0.90 V vs. RHE, which is 3.75 times enhancement compared with the commercial Pt/C(240 mA mg^(-1) Pt). After 30 k accelerated durability tests, its MA(690 m A mg^(-1) Pt) is still 2.88 times higher than the pristine Pt/C. This study thus provides a valuable method to design stable ORR catalysts with high efficiency and has great significance for the commercialization of PEMFCs.

关键词： Oxygen reduction reaction Surface platinum content regulate Ternary alloy catalyst Activity Stability

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基于集成特征选择和随机森林的古代玻璃分类模型

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硅酸盐学报 2023年第4期51卷 1060-1065页

作者：路佳佳山西工商学院计算机信息工程学院太原030006

将机器学习中的特征选择方法和分类算法融入古代玻璃制品成分分析和类别鉴定问题研究,以准确率和AUC作为分类性能度量指标,尝试构造古代玻璃制品化学成分选择的集成特征选择模型和鉴定分类的随机森林模型.对不同特征选择方法的结果进行... 详细信息

将机器学习中的特征选择方法和分类算法融入古代玻璃制品成分分析和类别鉴定问题研究,以准确率和AUC作为分类性能度量指标,尝试构造古代玻璃制品化学成分选择的集成特征选择模型和鉴定分类的随机森林模型.对不同特征选择方法的结果进行集成,选择重要的化学成分,对选出的重要特征结合随机森林模型、k近邻学习和Naive Bayes模型等方法进行实验分析.结果表明,采用集成特征选择分析出氧化铅、氧化钡、氧化钾等成分对玻璃表面风化影响比较显著,且高钾玻璃中这3种成分两两关联很大,对选出的重要特征应用基于k折交叉验证的随机森林模型进行分类得到的准确率较高,模型稳定性强.该方法可以为我国古代玻璃制品的成分分析和类别鉴定提供理论参考,对其它玻璃的相似研究也有一定程度的借鉴意义.

关键词：机器学习随机森林 k近邻学习分类算法

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Structural Changes in the Chinese Stock Market： A Review of Empirical Research

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中国会计与财务研究 2014年第2期16卷 39-65页

作者： Haitian lu jiajia Fu School of Accounting and Finance The Hong Kong Polytechnic University

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Advances in the Development of Gradient Scaffolds Made of Nano‑Micromaterials for Musculoskeletal Tissue Regeneration

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Nano-Micro Letters 2025年第3期17卷 455-500页

作者： Lei Fang Xiaoqi Lin Ruian Xu lu Liu Yu Zhang Feng Tian Jiao Jiao Li jiajia Xue Beijing Laboratory of Biomedical Materials Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China School of Biomedical Engineering Faculty of Engineering and ITUniversity of Technology SydneySydneyNSW 2007Australia

The intricate hierarchical structure of musculoskeletal tissues,including bone and interface tissues,necessitates the use of complex scaffold designs and material structures to serve as tissue-engineered *** has led to growing interest in the development of gradient bone scaffolds with hierarchical structures mimicking the extracellular matrix of native tissues to achieve improved therapeutic *** on the anatomical characteristics of bone and interfacial tissues,this review provides a summary of current strategies used to design and fabricate biomimetic gradient scaffolds for repairing musculoskeletal tissues,specifically focusing on methods used to construct compositional and structural gradients within the *** latest applications of gradient scaffolds for the regeneration of bone,osteochondral,and tendon-to-bone interfaces are ***,the current progress of testing gradient scaffolds in physiologically relevant animal models of skeletal repair is discussed,as well as the challenges and prospects of moving these scaffolds into clinical application for treating musculoskeletal injuries.

关键词： Gradient scaffolds Musculoskeletal tissues Advanced manufacturing Biomaterials Tissue regeneration

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一场诗与远方的“双向奔赴”--“电影+文旅”的价值路径与产业拓扑

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当代电影 2024年第12期 13-22页

作者：陆佳佳浙江师范大学艺术学院/丝路文化与国际汉学研究院

“电影+文旅”是文旅融合高质量发展的重要路径。“电影+文旅”在促进文旅产业联动、数智转型、经济赋能等方面效能显著,近年来,电影助力文旅跨界融合屡屡出圈。文旅前置、文旅后置、文旅并置等不同电影与文旅合作机制在当前的共存共叙... 详细信息

“电影+文旅”是文旅融合高质量发展的重要路径。“电影+文旅”在促进文旅产业联动、数智转型、经济赋能等方面效能显著,近年来,电影助力文旅跨界融合屡屡出圈。文旅前置、文旅后置、文旅并置等不同电影与文旅合作机制在当前的共存共叙,体现了影地“双向奔赴”的互赋基底;影像叙事中“气氛美学”的移情与当前身处数字化时代的人们普遍对于重建“附近”、找寻同一性的情感欲望则勾绘了电影与文旅融合的互赋机理及其中有关文化审美“从知到行,从行到知”的产业“外溢”逻辑。探赜“电影+文旅”长效机制的运行,需要清晰地认知到其中多语义交织网的在场,在打造具有中国特色、中国风格、中国气派的文旅内容的理念基础上,从影像美学、文旅模态、协同机制等多层面入手,形构电影与文旅政策、内容、技术三维度间良好的联动互馈机制。

关键词： “电影+文旅” 文旅融合电影IP 以影行事影地共叙

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