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Fabrication of BaTiO3/Epoxy Composites Exhibiting Large Dielectric Constant, Low Dielectric Loss and High Flexural Strength

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Journal of Wuhan University of Technology(Materials Science) 2019年第6期34卷 1266-1273页

作者： liu jinpeng YOU Xiaoqiang CHEN Nan DU Guoping School of Materials Science and Engineering Nanchang UniversityNanchang 330031China

BaTiO3/epoxy composites consisting of two three-dimensionally interpenetrating networks of BaTiO3 and epoxy phases were prepared using a new approach. The BaTiO3/epoxy composites exhibit a colossal dielectric constant, low dielectric loss and high flexural strength. In the BaTiO3 networks, chemically bonded grain boundaries between neighboring BaTiO3 grains were established, and they are responsible for the colossal dielectric constant and high flexural strength of the BaTiO3/epoxy composites. Furthermore, unlike the conventional ceramic/polymer composites, this approach also makes high loadings of BaTiO3 contents possible for the BaTiO3/epoxy composites without compromising their high flexural strength.

关键词： ceramic/polymer composite BaTiO3/epoxy dielectric property colossal dielectric constant

Evolutionary analysis of allotetraploid hybrids of red crucian carp×common carp,based on ISSR,AFLP molecular markers and cloning of cyclins genes

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Chinese Science Bulletin 2009年第16期54卷 2849-2861页

作者： liu LiangGuo YAN jinpeng liu ShaoJun liu Dong YOU CuiPing ZHONG Huan TAO Min liu Yun Key Laboratory of Protein Chemistry and Fish Developmental Biology of Ministry of Education College of Life Sciences HunanNormal University Changsha 410081 China

The allotetraploid hybrids of red crucian carp × common carp are the first reported artificially cultured polyploid fish with bisexual fertility and stable inheritance in vertebrate. Using ISSR and AFLP markers and the cyclins genes, the genomes and cyclin gene sequence changes were analyzed between the allotetraploid hybrids and their parents. The results indicated that the allotetraploids inherited many genetic characteristics from their parents and the genetic characteristics were stable after 15 generations. However, the allotetraploids had a closer genetic relationship with their original female parents and represented a bias toward the maternal progenitor. DNA fingerprinting analysis showed that the allotetraploids had undergone sequences deletion from their original parents and that the deleted sequences were mostly from the male parent's genome. Some non-parental bands were found in the allotetraploid hybrids. Sequences analysis of the cyclin A1 and B1 genes showed nonsynonymous substitutions of single nucleotides in codons that were different from their original parents, leading to non-parental amino acid loci. We speculate that the non-additivity in the allotetraploids, compared with their progenitors, could be an adjustment to the genomic shock from heterozygosity and polyploidy, allowing maintenance of genetic stability.

关键词：异源四倍体鲫鲤细胞周期蛋白基因克隆 AFLP分子标记 ISSR 杂交种 DNA指纹图谱分析进化

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预制装配式技术应用在综合管廊建设中的探讨

城市道桥与防洪 2024年第10期 315-318,M0029页

作者：吴会平刘金鹏卫田荷武汉市市政工程质量监督站湖北武汉430015 武汉市政工程设计研究院有限责任公司湖北武汉430023 武汉市市政工程机械化施工有限公司湖北武汉430030

综合管廊作为市政管道的重要载体是目前城市地下空间开发的重要形式之一。在城市"双碳"治理、绿色发展的前提下,以综合管廊建设为出发点,结合既有装配式技术在综合管廊建设中的应用,对比了全预制和叠合装配式两种装配结构形式的优缺点,... 详细信息

综合管廊作为市政管道的重要载体是目前城市地下空间开发的重要形式之一。在城市"双碳"治理、绿色发展的前提下,以综合管廊建设为出发点,结合既有装配式技术在综合管廊建设中的应用,对比了全预制和叠合装配式两种装配结构形式的优缺点,前者构件重量大、运输效率较低、防水性能较差,适用于场地开阔、运输条件好、地下水相对来讲不丰富地区,后者构件重量小、运输效率高、成本低、施工简单、工期短、节点防水性能好,更适合作为综合管廊建设的优选方案。给出装配式技术在工程实践中的若干关键技术点。

关键词：综合管廊预制装配式技术地下空间开发

Fine particle-bound PAHs derivatives at mountain background site(Mount Tai)of the North China:Concentration,source diagnosis and health risk assessment

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Journal of Environmental Sciences 2021年第11期33卷 77-87页

作者： Lei Zhao Shanjun Song Penghui Li Jing liu Jing Zhang Lei Wang Yaqin Ji jinpeng liu Liqiong Guo Jinbao Han School of Environmental Science and Safety Engineering Tianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Hazardous Waste Safety Disposal and Recycling Technology Tianjin 300384China National Institute of Metrology Beijing 100029China Easy Clear(Tianjin)Environment Protection Science&Technology Co. ItdTianjin 300380China Tianjin SF-Bio Industrial Bio-Tec Co. LtdTianjin 300462China Hebei research center for Geoanalysis Hebei 071000China College of Environmental Science and Engineering Nankai UniversityTianjin300350China Institute of Disaster Medicine Tianjin UniversityTianjin 300072China College of Quality and Technical Supervision Hebei UniversityBaodingHebei 071002China

Ten nitrated polycyclic aromatic hydrocarbons(nPAHs)and 4 oxygenated polycyclic aromatic hydrocarbons(oPAHs)in fine particulate matter(PM2.5)samples from Mount Tai were analyzed during summer(June to August),*** the observation campaign,themean concentration of total nPAHs and oPAHs was 31.62 pg/m^(3)and 0.15 ng/m^(3),*** of the monitored compounds,namely 9-nitro-anthracene(9N-ANT)(6.86 pg/m^(3))and 9-fluorenone(9FO)(0.05 ng/m^(3))were the predominant compounds of nPAHs and oPAHs,*** potential source and long-range transportation of nPAHs and oPAHs were investigated by the positive matrix factorization(PMF)method and the potential source contribution function(PSCF)*** results revealed that biomass/coal burning,gasoline vehicle emission,diesel vehicle emission and secondary formation were the dominant sources of nPAHs and oPAHs,which were mainly from Henan province and Beijing-Tianjin-Hebei region and Bohai *** incremental life cancer risk(ILCR)values were calculated to evaluate the exposure risk of nPAHs and oPAHs for three group people(infant,children and adult),and the values of ILCR were 7.02×10^(−10),3.49×10^(−9)and 1.41×10^(−8)for infant,children and adults,*** these values were lower than the standard of EPA(Environmental Protection Agency)(<10−6),indicating acceptable health risk of nPAHs and oPAHs.

关键词： Nitro-PAHs oxy-PAHs PMF PSCF Risk assessment

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大红鹳整体骨骼标本的制作与形态学特征

野生动物学报 2024年第1期45卷 103-109页

作者：赵岩李曦刘金鹏胥哲李辉国欣欣陈希鑫普天春赵素芬北京动物园管理处北京100044 中央美术学院北京100105

结合传统及改进工艺,采用剥皮、去除内脏、剔肉、拆解、消化、脱脂、漂白、装架、保存等工序制作成年雄性大红鹳(Phoenicopterus roseus)整体骨骼标本。制作时,选用市售84消毒液水溶液进行软组织消化,并在剔肉时保留腕关节、肘关节、膝... 详细信息

结合传统及改进工艺,采用剥皮、去除内脏、剔肉、拆解、消化、脱脂、漂白、装架、保存等工序制作成年雄性大红鹳(Phoenicopterus roseus)整体骨骼标本。制作时,选用市售84消毒液水溶液进行软组织消化,并在剔肉时保留腕关节、肘关节、膝关节等轴关节处的肌腱组织,在装架完毕后小心剔除,以确保大面积关节接触面或细碎籽骨的精确组装。制作的骨骼标本形态完整、外观莹白,易于长期保存,适宜推广应用。同时在制作过程中,对标本进行系统的形态学观察和描述,发现大红鹳不仅具备鸟类骨骼轻便和坚固的共性,其下颌骨、颈椎及下肢骨也具备适应饮食和涉水生活习性的特性,收集的相关骨骼参数为未来鸟类的骨骼系统研究提供基础数据。

关键词：大红鹳整体骨骼标本标本制作形态学特征

Synergically improved energy storage performance and stability in sol–gel processed BaTiO_(3)/(Pb,La,Ca)TiO_(3)/BaTiO_(3) tri-layer films with a crystalline engineered sandwich structure

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Journal of Advanced Ceramics 2023年第12期12卷 2300-2314页

作者： jinpeng liu Ying Wang Hanfei Zhu Hongyu Luo Xiao Zhai Yu Huan Jing Yan Kun Wang Chao liu Hongbo Cheng Jun Ouyang School of Chemistry and Chemical Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China School of Physics Shandong UniversityJinan 250100China School of Material Science and Engineering University of JinanJinan 250022China College of Physics and Electronic Engineering Qilu Normal UniversityJinan 250200China China Tobacco Shandong Industrial Co. Ltd.Jinan 250014China Key Laboratory of Key Film Materials&Application for Equipments(Hunan Province) Hunan Provincial Key Laboratory of Thin Film Materials and DevicesSchool of Material Sciences and EngineeringXiangtan UniversityXiangtan 411105China

Achieving an excellent energy storage performance,together with high cycling reliability,is desirable for expanding technological applications of ferroelectric ***,in well-crystallized ferroelectric materials,the concomitant high polarizability and low polarization saturation field have led to a square-shaped polarization–electric field loop,fatally impairing both recoverable energy density(W_(rec))and efficiency(η).Nanocrystalline ferroelectric films with a macroscopically amorphous structure have shown an improved W_(rec) andη,but their much lower polarizability demands an extremely high electric field to achieve such performances,which is undesirable from an economic ***,we propose a strategy to boost the energy storage performances and stability of ferroelectric capacitors simultaneously by constructing a tri-layer film in which a well-crystallized ferroelectric layer was sandwiched by two pseudo-linear dielectric layers with a dominant amorphous *** sol–gel-derived BaTiO_(3)/(Pb,La,Ca)TiO_(3)/BaTiO_(3)(BTO/PLCT/BTO)tri-layer films,we show that the above design is realized via rapid thermal annealing which fully crystallized the middle PLCT layer while left the top/bottom BTO cap layers in a poor crystallization *** sandwiched structure is endowed with an enhanced maximum polarization while a small remnant one and a much-delayed polarization saturation,which corresponds to large W_(rec)≈80 J/cm^(3) and highη≈86%.Furthermore,the film showed an outstanding cycling stability:its W_(rec) andηremain essentially unchanged after 10^(9) electric cycles(DW/W<4%,Dη/η<2%).These good energy storage characteristics have proved the effectiveness of our proposed strategy,paving a way for the utilization of sandwiched films in applications of electric power systems and advanced pulsed-discharge devices.

关键词： energy storage sandwich film amorphous structure nanocrystal cluster stability

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高密度电法在汛期堤防渗漏隐患探测中的应用

河北水利电力学院学报 2024年第1期34卷 29-33页

作者：刘栋臣汤克轩刘金鹏李国瑞王志豪中水北方勘测设计研究有限责任公司天津市300222

汛期高水位、高渗透压力下,会造成堤防渗漏缺陷扩大或隐患加剧,快速、准确地开展堤防渗漏隐患应急排查,是指导科学防汛、保障安全度汛的重要举措。针对管涌、散浸、穿堤建筑物等渗漏缺陷及隐患,开展了高密度电法的场地试验,得到汛期堤... 详细信息

汛期高水位、高渗透压力下,会造成堤防渗漏缺陷扩大或隐患加剧,快速、准确地开展堤防渗漏隐患应急排查,是指导科学防汛、保障安全度汛的重要举措。针对管涌、散浸、穿堤建筑物等渗漏缺陷及隐患,开展了高密度电法的场地试验,得到汛期堤岸的电性结构,通过比对试验,得到不同渗漏缺陷与无显著缺陷堤岸的电性差异,以此为基准,采用高密度电法对子牙河右堤天津静海段特别是子牙河汇入独流减河段进行隐患排查,划分了渗漏隐患区和潜在风险区,为保障海河流域“23·7”特大洪水期间堤防安全提供了重要技术支撑。

关键词：渗漏探测应急抢险堤岸子牙河高密度电法

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智能学习桌升降系统关键技术研究

微处理机 2024年第3期45卷 43-46页

作者：刘金鹏贺怡豪王梦超张珊珊西安工业大学电子信息工程学院西安710021

针对智能学习桌升降系统在使用中存在的问题,对现有产品加以改进,提出一种智能学习桌系统的设计方案。新设计引入超声波测距控制转台,实现升降系统所需调整高度的自动检测。作为关键技术,根据升降系统的工作特点,引入编码单元,采用位置... 详细信息

针对智能学习桌升降系统在使用中存在的问题,对现有产品加以改进,提出一种智能学习桌系统的设计方案。新设计引入超声波测距控制转台,实现升降系统所需调整高度的自动检测。作为关键技术,根据升降系统的工作特点,引入编码单元,采用位置环闭环的方式以及积分分离PID控制策略,进一步优化升降系统调节过程。通过实验验证了该方案的合理性。本方案实现的智能学习桌设计简单,成本低廉,适用性广,可为同类产品的设计开发提供思路。

关键词：智能学习桌升降系统 PID控制编码单元

High density holographic versatile disc (HVD) system using collinear technologies

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红外与激光工程 2016年第9期45卷 48-53页

作者： Hideyoshi Horimai Lin Xiao liu jinpeng Tan Xiaodi HolyMine Corporation Shizuoka 410-0022 Japan Toyohashi University of Technology Toyohashi 441-8580 Japan Beijing Institute of Technology Beijing 100081 China

Collinear Holography was proposed by OPTWARE Corporation, in which the information and reference beams were aligned co-axially and modulated by the same SLM. With this unique configuration the optical pickup can be designed as small as the DVD ′ s, and can be placed on one side of the recording disc. A 2-dimensional digital page data format was used and the shift-multiplexing method was employed to increased recording density of HVD. As the servo technology is being introduced to control the objective lens to be maintained precisely to the disc in the recording and the reconstructing process, a vibration isolator is no longer necessary. In HVD, the pre-formatted meta-data reflective layer was used for the focus/tracking servo and reading address information, and the dichroic mirror layer was used for detecting holographic recording information without interfering with the preformatted *** and theoretical studies suggest that the holographic material is very effective to increased recording density of the system. HVD will be compatible with existing disc storage systems, like CD and DVD, and enable us to expand its applications into other optical information storage systems.

关键词：激光雷达成像仿真空间目标在轨