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Rational Fabrication of Superhydrophobic Nanocone Surface for Dynamic Water Repellency and Anti-icing Potential

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Journal of Bionic Engineering 2019年第1期16卷 27-37页

作者： Yuehan Xie Haifeng Chen Yizhou Shen Jie Tao Mingming Jin Yu Wu wenqing hou College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China Department of Materials Chemistry Qiuzhen SchoolHuzhou UniversityHuzhou 313000China School of Materials Science and Engineering Nanyang Technological UniversityNanyang Avenue 50 Singapore 639798Singapore Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing Tech University Nanjing 210016China

In this work,a simple and economic route was presented to fabricate an anti-icing superhydrophobic surface with nanocone structures,which were constructed only by one-step facile method of hydrothermal treatment with zinc acetate on the aluminum *** modifying with fluoroalkylsilane (FAS-17),the nanocone structures with the appropriate size could induce the high superhydrophobicity with the water contact angle reaching 160.2° ± 0.4° and the sliding angle only being 1 ° ± 0.5°.Under the dynamic environments,the impact droplets could rapidly bounced off the surface with the shorter contact time of^1 0.6 ms,and it was mainly attributing to lower capillary adhesive force (water adhesion force of 4.1 μN) induced by the open system of nanocone ***,the superhydrophobic nanocone surfaces were verified to be a promising anti-icing/icephobic materials,on which the water droplets needed to spend the time of ~517 s to complete the entire freezing process at-10 ℃,displaying the increased ~50 times of icing-delay performance comparing with untreated *** if ice finally was formed on the superhydrophobic nanocone surfaces,it could be easily removed away with lower ice adhesion of^45 *** repeatable measurement of ice adhesion strength on the same place of the superhydrophobic surface is still far less than the surface ice adhesion of smooth substrate,exhibiting better stability.

关键词： superhydrophobic nanocone dynamic water repellency anti-icing potential

Real-time imaging of structure and dynamics of transmembrane biomolecules by FRET-induced single-molecule fluorescence attenuation

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Biophysics Reports 2021年第6期7卷 490-503页

作者： Dongfei Ma wenqing hou Chenguang Yang Shuxin Hu Weijing Han Ying Lu Songshan Lake Materials Laboratory Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences University of Chinese Academy of Sciences

Tracking the transmembrane topology and conformational dynamics of membrane proteins is key to understand their functions. It is however challenging to monitor position changes of individual proteins in cell membranes with high sensitivity and high resolution. We review on three single-molecule fluorescence imaging methods — SIFA, Lipo FRET and Queen FRET — recently developed in our lab for studying the dynamics of membrane proteins. They can be applied, progressively, to investigate membrane proteins in solid-supported lipid bilayers, artificial liposome membranes and live-cell plasma membranes. The techniques take advantage of the energy transfer from a fluorophore to a cloud of quenchers and are able to extract in real time positions and position changes of a single fluorophorelabeled protein in the direction normal to the membrane surface. The methods have sub-nanometer precision and have proved powerful to investigate biomolecules interacting with bio-membranes.

关键词： Single-molecule fluorescence imaging Dynamics of membrane proteins

Investigation of Heterogeneous Ice Nucleation on the Micro-Cubic Structure Superhydrophobic Surface for Enhancing Icing-Delay Performance

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Journal of Renewable Materials 2020年第12期8卷 1617-1631页

作者： Senyun Liu Qinglin Liu Xian Yi Yizhou Shen Long Guo wenqing hou Haifeng Chen Zhen Wang State Key Laboratory of Aerodynamics China Aerodynamics Research and Development CenterMianyang621000China Key Laboratory of Icing and Anti/De-icing China Aerodynamics Research and Development CenterMianyang621000China Department of Materials Chemistry Qiuzhen SchoolHuzhou UniversityHuzhou313000China College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing210016China

The aim of this study is to explore the heterogeneous ice nucleation behavior based on controllable micro-cubic array structure surfaces from the statistic *** this end,we firstly constructed a group of micro-cubic array structures on silicon substrates by a selective plasma etching *** grafting low-free-energy substance,the as-constructed micro-cubic array structure surfaces exhibited higher non-wettability with the water contact angle being up to 150°.On this basis,500 cycles of freezing and melting processes were accurately recorded to analyze the instantaneous ice nucleation behavior according to the statistical results of freezing *** a consequence,the statistical freezing temperature of the sample with micro-spacing distance of 40μm is as low as−17.13°*** microstructure configuration(conforming to Cassie-Baxter wetting regime)not only could entrap more air pockets,but also achieved lower solid-liquid contact area,resulting in lower ice nucleation rate(~2–3 orders of magnitude less than that on the flat substrate).Furthermore,the gradually increasing micro-spacing distance to 60μm would induce the transition from CassieBaxter to Wenzel wetting state,leading to higher freezing probability and ice nucleation *** complete understanding on microstructure configuration improving the ice nucleation will lay the foundation stone for the microstructure design of ice-repellent materials.

关键词： Microstructure configuration superhydrophobic ice nucleation antiicing/icephobic material

一种海洋来源ETP类化合物GQQ-ZML-2抑制H358细胞增殖作用与机制的研究

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中国海洋药物 2024年第3期43卷 9-18页

作者：黄春霄戚欣侯文青张宁张晓敏李德海李静中国海洋大学海洋药物教育部重点实验室医药学院山东青岛266003 青岛海洋科技中心海洋药物与功能制品实验室山东青岛266237

目的探究化合物GQQ-ZML-2对H358细胞(KRAS^(G12C))的增殖抑制作用并初步研究其作用机制。方法采用磺酰罗丹明B法(SRB法)测定GQQ-ZML-2对不同KRAS突变的肿瘤细胞的细胞毒;采用流式细胞术检测细胞周期和细胞凋亡;利用荧光探针DCFH-DA检测... 详细信息

目的探究化合物GQQ-ZML-2对H358细胞(KRAS^(G12C))的增殖抑制作用并初步研究其作用机制。方法采用磺酰罗丹明B法(SRB法)测定GQQ-ZML-2对不同KRAS突变的肿瘤细胞的细胞毒;采用流式细胞术检测细胞周期和细胞凋亡;利用荧光探针DCFH-DA检测细胞内总活性氧(reactive oxygen species,ROS)水平;蛋白质印迹法(western blotting,WB)检测相关信号蛋白的表达水平。结果GQQ-ZML-2选择性抑制H358细胞增殖,以浓度依赖的方式抑制克隆形成并将细胞周期阻滞于G2/M期而诱导细胞凋亡。机制研究表明GQQ-ZML-2引起KRAS^(G12C)依赖的ROS产生,抑制AKT/mTOR和JAK2/STAT3信号通路。结论GQQ-ZML-2是一种新型的具有选择性抑制H358细胞增殖作用的海洋来源化合物,其作用机制可能与诱导KRAS^(G12C)依赖的ROS增加相关。为开发新型的拮抗具有KRAS^(G12C)突变肿瘤的药物提供了实验依据。

关键词： H358细胞 KRAS突变活性氧抗肿瘤抑制剂

Alloy/layer double hydroxide interphasic synergy via nano-heterointerfacing for highly reversible CO_(2)redox reaction in Li-CO_(2)batteries

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Nano Research 2024年第6期17卷 5206-5215页

作者： Tianzhen Jian wenqing Ma Jiagang hou Jianping Ma Xianhong Li Haiyang Gao Caixia Xu Hong Liu Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongSchool of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China Kyiv College at Qilu University of Technology Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China Shandong Sacred Sun Power Sources Co. Ltd.Qufu 273100China

Li-CO_(2)batteries are among the most intriguing techniques for balancing the carbon cycle,but are challenged by the annoyed thermodynamic barrier of the Li_(2)CO_(3)decomposition ***,we demonstrate the electrocatalytic performances of two-dimensional(2D)CoAl-layer double hydroxide(LDH)nanosheets can be significantly improved by trans-dimensional crosslinking with three-dimensional(3D)multilevel nanoporous(MP)-RuCoAl alloy(MP-RuCoAl alloy⊥CoAl-LDH).The MP-RuCoAl alloy⊥CoAl-LDH with multiscale pore channels and abundant nano-heterointerface is directly prepared by controllable etching Al from a Ru-Co-Al master alloy along with simultaneous partial oxidization of Al and Co *** MP-RuCoAl is composed of various intermetallic compounds and Ru with abundant grain boundaries,and forms numerous heterointerface with 2D CoAl-LDH *** multiscale porous metallic network benefits mass and electron transportation as well as discharge product storage and enables a rich multiphase reaction *** situ differential electrochemical mass spectrometry shows that the mass-to-charge ratio in the charging process is~0.733 which is consistent with the theoretical value of 3/4,stating that the reversible co-decomposition of Li_(2)CO_(3)and C can be achieved with the MP-RuCoAl alloy⊥*** Ketjen black(KB)/MP-RuCoAl⊥CoAl-LDH battery demonstrates a high cyclability for over 2270 h(227 cycles)with a lower voltage gap stabilized at~1.3 V at 200 mA·g^(−1).Our findings here provide useful guidelines for developing high efficiency transition metal based electrocatalysts by coupling with conductive porous substrate for impelling the development of practical Li-CO_(2)battery systems.

关键词： heterojunction interface nanoporous Li-CO_(2)battery dealloying

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基于改进堆叠降噪自编码的滚动轴承故障分类

机械工程学报 2018年第7期54卷 87-96页

作者：侯文擎叶鸣李巍华华南理工大学机械与汽车工程学院华南理工大学广东省汽车检测工程技术研究中心

作为一种新兴的机器学习方法,深度学习在故障诊断领域逐渐得到了应用。其中,堆叠降噪自编码(Stacked de-noising auto-encoders,SDAE)算法先对原始数据添加'损伤噪声',然后通过自编码网络进行数据重构,从而得到更鲁棒性的特征表示,易于... 详细信息

作为一种新兴的机器学习方法,深度学习在故障诊断领域逐渐得到了应用。其中,堆叠降噪自编码(Stacked de-noising auto-encoders,SDAE)算法先对原始数据添加'损伤噪声',然后通过自编码网络进行数据重构,从而得到更鲁棒性的特征表示,易于进行故障分类。然而针对具体的故障诊断问题,网络隐含层节点数、稀疏参数以及输入数据置零比例将直接影响诊断的结果。因此,提出一种改进的SDAE诊断方法,利用粒子群算法(Particle swarm optimization,PSO)对DAE网络超参数进行自适应的选取来确定SDAE网络结构,据此得到故障状态的特征表示,输入到Soft-max分类器中进行故障分类识别。通过变转速工况下的滚动轴承故障仿真和模拟试验对算法进行验证,试验结果表明,基于PSO-SDAE网络的诊断方法在泛化性、故障识别率方面均优于支持向量机(Support vector machine,SVM)、反向传播神经网络(Back propagation,BP)以及深度置信网络(Deep belief network,DBN)。

关键词：降噪自编码深度神经网络超参数优化故障诊断

基于DSP的电能质量检测与无功补偿综合测控装置

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仪器仪表学报 2007年第1期28卷 120-127页

作者：侯文清张波丘东元李娟华南理工大学电力学院广州510640

本文研制了一台基于DSP的电能质量检测与无功补偿综合测控装置。该装置集电能质量检测与动态无功功率补偿于一体;采用复序列快速傅立叶算法,结合DSP处理器中反向进位的间接寻址方式实现了采样数据的快速处理;克服了DSP与MCS-51单片机配... 详细信息

本文研制了一台基于DSP的电能质量检测与无功补偿综合测控装置。该装置集电能质量检测与动态无功功率补偿于一体;采用复序列快速傅立叶算法,结合DSP处理器中反向进位的间接寻址方式实现了采样数据的快速处理;克服了DSP与MCS-51单片机配合存储电网数据的时序不一致性;解决了串口及USB接口数据传输问题;应用嵌入式软件快速生成数据分析报表及曲线,保证了负载动态无功补偿的实时性。实际运行表明．该装置可以快速准确地检测出表征电网质量的各项参数,并实现电网60天数据存储停电不丢失,上传数据准确率高,动态无功补偿实时性好,达到了实际应用的水平。

关键词：电能质量检测无功补偿数据存储通信

21世纪非洲社会主义运动总体特征及其发展趋势

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社会主义研究 2021年第5期 148-154页

作者：程光德侯文清武汉理工大学安全科学与应急管理学院党委武汉理工大学马克思主义学院

21世纪非洲社会主义运动呈现"局部有推进"与"整体仍艰难"并存的特点,"局部有推进"归功于少数共产党(工人党)坚持独立自主的发展道路、坚持把马列主义基本原理与本国国情相结合、不断加强党的自身建设等三个原因;"整体仍艰难"的原因包括... 详细信息

21世纪非洲社会主义运动呈现"局部有推进"与"整体仍艰难"并存的特点,"局部有推进"归功于少数共产党(工人党)坚持独立自主的发展道路、坚持把马列主义基本原理与本国国情相结合、不断加强党的自身建设等三个原因;"整体仍艰难"的原因包括绝大多数共产党(工人党)没有将党自身建成一支有战斗力的队伍,长期遭受"两种力量"打击,资本主义国家实施"温和化"战略和"福利化"政策等四个方面;展望21世纪非洲社会主义运动的态势,一方面,21世纪非洲社会主义运动仍然有一定的空间,另一方面,21世纪非洲社会主义发展面临着严峻的挑战。

关键词：非洲社会主义运动共产党世界社会主义运动

Preparation of Laser Cladding Coating Undercooling Cu-based Alloy and Co on Non-equilibrium Solidification Structure

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Journal of Wuhan University of Technology(Materials Science) 2024年第2期39卷 463-472页

作者：田徐铭 CAO Shichao hou Kai hou Xiaopeng WANG Hongfu 张煜 Department of Outpatient Xinzhou People’s HospitalXinzhou 034099China School of Mechanical Engineering North University of ChinaTaiyuan 030051China Department of Neurosurgery Xinzhou People’s HospitalXinzhou 034099China Department of Orthopedics Xinzhou People’s HospitalXinzhou 034099China

The effect of the gradient content of Co element on the solidification process of Cu-based alloy under deep under cooling conditions was *** non-equilibrium solidification structure of the under cooled alloy samples were *** is found that the rapidly solidified alloy has undergone twice grain refinement during the undercooling *** and significance of the maximum undercooling refinement structure of Cu60Ni35Co5 at T=253 K were ***-density defects were observed,such as dislocations,stacking faults networks,and twinning *** standard FCC diffraction pattern represents that it is still a single-phase *** on the metallographic diagram,EBSD and TEM data analysis,it is illustrated that the occurrence of grain refinement under high undercooling is due to stress induced *** addition,the laser cladding technology is used to coat Co-based alloy(Stellite12) coating on 304 stainless steel substrate;the microstructure of the coating cross-section was *** was found that the microstructure of the cross-section is presented as columnar crystals,planar crystals,and disordered growth direction,so that the coating has better hardness and wear *** electrochemical corrosion of the substrate and coating,it can be seen that the Co and Cr elements present in the coating are more likely to form a dense passivation film,which improved the corrosion resistance of the coating.

关键词： non-equilibrium solidification structure undercooling recrystallization laser cladding coating