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Anomalous refinement and uniformization of grains in metallic thin films

Nano Research 2023年第12期16卷 13358-13365页

作者： Lei Wang Shu Wang Xiaofeng Wang Jianming Zhang jianjie dong Bin Wei Haiguang Yang Zhongchang Wang Ziyang Zhang ChuanFei Guo Qian Liu Chinese Academy of Sciences(CAS)Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology&University of Chinese Academy of SciencesBeijing 100190China College of Mathematics and Physics Qingdao University of Science and TechnologyQingdao 266061China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China School of Materials Sun Yat-Sen UniversityGuangzhou 510275China International Iberian Nanotechnology Laboratory(INL) Department of Quantum and Energy MaterialsBraga 4715-330Portugal School of Electronic and Information Engineering Qingdao UniversityQingdao 266071China The MOE Key Laboratory of Weak-Light Nonlinear Photonics and TEDA Applied Physics Institute and School of Physics Nankai UniversityTianjin 300457China

When a laser beam writes on a metallic film,it usually coarsens and deuniformizes grains because of Ostwald ripening,similar to the case of *** we show an anomalous refinement effect of metal grains:A metallic silver film with large grains melts and breaks into uniform,close-packed,and ultrafine(~10 nm)grains by laser direct writing with a nanoscale laser spot size and nanosecond pulse that causes localized heating and adaptive *** method exhibits high controllability in both grain size and uniformity,which lies in a linear relationship between the film thickness(h)and grain size(D),D∝*** linear relationship is significantly different from the classical spinodal dewetting theory obeying a nonlinear relationship(D∝h5/3)in common laser *** also demonstrate the application of such a silver film with a grain size of~10.9 nm as a surface-enhanced Raman scattering chip,exhibiting superhigh spatial-uniformity and low detection limit down to 10-15 *** anomalous refinement effect is general and can be extended to many other metallic films.

关键词： laser direct writing anomalous refinement localized heating ripening linear relationship

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Bionic SERS chip with super-hydrophobic and plasmonic micro/nano dual structure

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Photonics Research 2018年第2期6卷 77-83页

作者： FENGYOU YANG HAORAN ZHANG HUIMIN FENG jianjie dong CHUANG WANG QIAN LIU CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China MOE Key Laboratory of Weak-Light Nonlinear Photonics TEDA Applied Physics Institute School of Physics Nankai University Tianjin 300457 China

Natural surface-enhanced Raman spectroscopy （SERS） chips based on plants or insects have gained increased attention due to their facile characteristics and low costs. However, such chips remain a major challenge for practical application because of poor reproducibility and stability as well as unavoidable damage to the surface structure during coating metal and uncontrolled dehydration. By using a simple wrinkling method, we develop a new route to fabricate a low-cost bionic SERS chip for practical detection. Inspired by the taro leaf, we fabricate a SERS chip with a super-hydrophobic and plasmonic micro/nano dual structure, and its structure parameters can be optimized. Compared with the natural taro-leaf SERS chip, our artificial chip exhibits Raman signals with an order of magnitude higher sensitivity （N 10-9 M） and enhancement factor （N 107） under the illumination of weak laser radiation, demonstrating that our SERS chip has great potential in biological detection. The excellent per- formances of our bionic SERS chip are attributed to a synergy of optimized micro-wrinkle and nano-nest, which is verified by experiment and simulation. We believe our bionic chip could be a promising candidate in practical application due to its merits such as simple fabricating process, optimizable structure, low cost, excellent homo- geneity, high sensitivity, and stability.

关键词： (220.4241) Nanostructure fabrication (240.6695) Surface-enhanced Raman scattering.

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光学显微图像定量评价方法及应用研究进展(特邀)

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激光与光电子学进展 2024年第6期61卷 216-232页

作者：王瑾张祖鑫陈勰宇董建杰匡翠方刘文杰之江实验室浙江杭州311121 浙江大学光电科学与工程学院极端光学技术与仪器全国重点实验室浙江杭州310027

作为工业数字图像质量评价在应用领域的重要延伸,光学显微图像定量评价主要通过对图像特征和属性进行分析计算,针对性地量化评估图像的质量。近年来,随着各类光学显微成像技术的蓬勃发展,图像定量化评价的重要性日益凸显,在总体图像处... 详细信息

作为工业数字图像质量评价在应用领域的重要延伸,光学显微图像定量评价主要通过对图像特征和属性进行分析计算,针对性地量化评估图像的质量。近年来,随着各类光学显微成像技术的蓬勃发展,图像定量化评价的重要性日益凸显,在总体图像处理中具有指导性作用。对现有的光学显微图像定量评价指标及相关算法进行总结,对各个算法的模型结构和性能表现进行讨论说明,阐述显微图像定量评价的应用和发展趋势,并对该领域目前所存在的问题和难点进行分析和展望。

关键词：光学显微图像定量评价分辨率信噪比结构相似度

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高频功率放大器最佳导通角的理论定义与控制

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现代电子技术 2007年第1期30卷 170-172页

作者：董建杰陈可中肖桂平王戎丞郑明晖广西大学物理科学与工程技术学院广西南宁530004

介绍了高频电子线路中谐振功率放大器的最佳导通角的定义,并通过严格的理论分析,给出了其求解方程,然后利用方程近似解法,通过计算机编程求出了最佳导通角的具体解,并分析了他在具体设计中的应用。

关键词：效率功率最佳导通角高频功率放大器

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红外测温仪的设计

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电子测量技术 2007年第10期30卷 11-14,25页

作者：陈可中谭翔董建杰郑明晖王戎丞肖桂平广西大学物理科学与工程技术学院南宁530004

为了克服传统的温度计测量温度的主要缺点——需要测量者与被测目标近距离接触和测量不方便。在顾及仪器测量高精度前提下,以追求最低成本为原则,本文设计了红外测温仪的整体系统构架。接着根据热释电原理,主要针对人体体温测量进行了... 详细信息

为了克服传统的温度计测量温度的主要缺点——需要测量者与被测目标近距离接触和测量不方便。在顾及仪器测量高精度前提下,以追求最低成本为原则,本文设计了红外测温仪的整体系统构架。接着根据热释电原理,主要针对人体体温测量进行了具体的设计开发,开发包括硬件电路,外围工艺,单片机程序和主机程序。并利用设计出来的红外测温仪在环境温度30℃下对人体温度和水温进行了测量,对人体的温度测量的误差低于±0.1℃。

关键词：温度测量红外传感器热释电红外辐射

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Occurrence and Health Risk of Perfluoroalkyl Acids in Popular Shellfish from a Typical Coastal Area of the East China

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Chemical Research in Chinese Universities 2023年第3期39卷 492-501页

作者： LIU Ruolin LIU Mei ZHAO Chuxuan FU jianjie ZHOU Wei ZHANG Qinghua Martin HANSEN dong Yin Sino-Danish College University of Chinese Academy of SciencesBeijing100049P.R.China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100085P.R.China School of Environment and Health Jianghan UniversityWuhan430056P.R.China Environmental Metabolomics Lab Department of Environmental ScienceAarhus UniversityFrederiksborgvej 3994000RoskildeDenmark The People’s Hospital of Yuhuan Yuhuan317600P.R.China

As crucial homologous members of per-and polyfluoroalkyl substances(PFASs),perfluoroalkyl acids(PFAAs)have aroused wide public concern because of their unique properties(persistence,bioaccumulation,long-distance migration and toxicity).Studies have shown their potential hazard to wildlife and humans,with food consumption as one of the primary routes of PFAA exposure for general population,especially seafood *** this study,17 PFAAs were quantified in 9 shellfish species from Yuhuan City,a typical coastal area of the East *** total mean concentrations of PFAAs were in the range of 5.03–381 ng/g dry weight(dw),with the highest concentration found in Neverita didyma and the lowest in Babylonia *** and composition profiles of PFAAs varied significantly among different species,indicating differences in the bioaccumulation potential of PFAAs among *** acid(PFOA)was presented as the most abundant PFAA in this study,followed by perfluorobutanoic acid(PFBA).Significant positive correlations were observed among some individual PFAAs(p<0.05),indicating that they may share similar pollution sources or undergo similar compound *** risk assessment indicated a relatively high threat for local residents exposed to PFAAs through shellfish consumption.

关键词： Perfluoroalkyl acid Shellfish East China Sea Occurrence Health risk assessment

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广东建工科创大厦空调系统设计研究

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制冷 2024年第3期43卷 15-21页

作者：陈祖铭胡谦张欣欣董建杰仇吉孔繁武陈宇轩华南理工大学建筑设计研究院有限公司广州建鑫嵘赋有限公司

通过对广东建工科创大厦通风空调系统的设计研究,对空调系统冷热源、空调系统设置、空调冷冻水系统的合理分区、防排烟系统等进行研究,采取了合理的设计,满足了各功能区的使用要求,达到了节约投资及运行节能的目的。

关键词：空调系统冷负荷水系统防排烟压力分区节能

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Numerical investigation of heat transfer performance and bubble behavior of nucleate pool boiling in a confined space under rolling conditions

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Energy Storage and Saving 2023年第1期2卷 336-347页

作者： jianjie Cheng Jiangwei Sun Weihao Ji Yu dong Wei Li Yurong Chen College of Urban Construction Nanjing Tech UniversityNanjing211816China

Nucleate pool boiling process is widely used in heat exchangers because of its excellent heat transfer *** the gradual increase of applications,more and more equipments work in a non-static state,but there is little research under rolling ***,it is necessary to investigate the influence of rolling motion on the nucleate pool boiling *** this study,a numerical investigation of the nucleate pool boiling process under static and rolling conditions is performed based on the volume-of-fluid(VOF)*** fields and phase distribution under static state and rolling motion are compared to investigate the effect of rolling motion on the nucleate pool boiling *** results show that rolling motion greatly influences the bubble behavior and void fraction owing to the differences between flow *** void fraction decreased by 11.84%,48.82%,and 56.87%as the maximum rolling angle increased from 15°to 45°,and by 11.84%,22.27%,and 21.81%as the rolling period increased from 1 s to 3 *** void fraction decreased by 11.84%,48.82%,and 56.87%as the maximum rolling angle increased from 15°to 45°.The heat transfer coefficients of different cases are compared,and it is found that the effects of rolling motion on heat transfer coefficients can be ignored.

关键词： Nucleate pool boiling Rolling condition Bubble behavior Heat transfer characteristic

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Survival difference between EGFR Del19 and L858R mutant advanced non-small cell lung cancer patients receiving gefitinib:a propensity score matching analysis

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Chinese Journal of Cancer Research 2017年第6期29卷 553-560页

作者： Minglei Zhuo Qiwen Zheng Jun Zhao Meina Wu Tongtong An Yuyan Wang jianjie Li Shuhang Wang Jia Zhong Xue Yang Hanxiao Chen Bo Jia Zhi dong Emei Gao JingjingWang Ziping Wang Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of Thoracic Medical OncologyPeking University Cancer Hospital&InstituteBeijing 100142China Department of Epidermiololgy and Biostatistics School of Public HealthPeking UniversityBeijing 100191China

Objective： Although superior clinical benefits of epidermal growth factor receptor （EGFR） tyrosine kinase inhibitors （TKIs） in the treatment of advanced non-small-cell lung cancer （NSCLC） had been reported, the survival difference between exon 19 deletion （Dell9） and exon 21 Leu858Arg substitution （L858R） remains controversial. The purpose of this study is to investigate the differences in progression-free survival （PFS） and overall survival （OS） between different EGFR mutant subtypes among advanced NSCLC patients receiving gefitinib. Methods： There were 204 advanced NSCLC patients with EGFR mutations treated with gefitinib were enrolled in this retrospective cohort study. Patients were divided into the EGFR Dell9 group and the L858R mutated group according to their mutant subtype. Propensity score matching （PSM） was conducted by using a nearest-neighbor algorithm （1：1） to adjust for demographical and clinical covariates. Survival curves were constructed with the Kaplan-Meier method and compared by using the log-rank test. Results： The PFS in Dell9 group was similar to that in the L858R group [before PSM 8.6 vs. 7.2 months, P=0.072; after PSM 7.3 vs. 7.2 months, P=0.155]. No differences were detected in OS between the L858R and the Dell9 group （before PSM 17.8 vs. 13.1 months, P=0.253; after PSM 16.9 vs. 13.1 months, P=0.339）. The Dell9 group was significantly younger compared with the L858R mutation group in age （P=0.015）. Conclusions： No significant difference was found in the PFS or OS between the Dell9 and L858R mutant NSCLC patients receiving gefitinib. The age gap might contribute to the survival differences between Dell9 and L858R groups. PSM is of important value to the elimination of potential bias.

关键词： Non-small-cell lung cancer epidermal growth factor receptor tyrosine kinase inhibitors survival propensity score matching

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等离子及拼接液晶大屏在电视演播室中的应用

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电视技术 2012年第18期36卷 104-107页

作者：陈东李建杰青岛电视台新闻综合频道技术制作部山东青岛266000

详细介绍了青岛电视台新闻演播室背景大屏系统的构成,各主要设备的特点,以及在维护使用中的一些体会。对于电视技术工作者来说,不但要熟悉背景大屏系统的结构和工作原理,还要熟悉控制软件和播出软件的使用方法,才能不断提高设备维护水平。

关键词：三菱液晶LCD屏拼接控制器应急模式切换维护心得

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