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Study on preparation,characterization and application of mixed-colorants thermochromic microcapsules

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Particuology 2024年第5期88卷 89-97页

作者： Lan Zhou Jingpeng Ye Qinze Cai Guojin Liu Mehran Dadgar Guocheng Zhu guoqing Zhang College of Textile Science and Engineering (International Institute of Silk) Zhejiang Sci-Tech UniversityHangzhou310018China School of Materials Science& Engineering Zhejiang Sci-Tech UniversityHangzhou310018China Department of Textile University of NeyshaburAdib BoulevardKhorasan Razavi ProvinceIran Zhejiang Charming Dyeing and Finishing Co. LtdJiaxing314500China Zhejiang Provincial Innovation Center of Advanced Textile Technology Shaoxing312000China

In order to expand the color-change range and make the discoloration temperature suitable for the daily textiles,a new formulation of mixed-colorants thermochromic core material is designed,in which crystal violet lactone(CVL)is the basic color former,bisphenol A(BPA)is the developer,especially the solvent-based dye and dodecyl dedecanoate are used as the extended dye and the solvent,*** electron microscope(SEM),differential scanning calorimeter(DSC)and thermogravimetric analyzer(TGA)were applied to study the morphology,encapsulation rate,non-isothermal crystallization behavior and thermal stability of the mixed-colorant thermochromic microcapsules(MCTMs)prepared by in-situ *** results show that MCTMs have good sphericity,uniform particle size,good thermal stability and the encapsulation rate can reach 86.73%.Under the non-isothermal conditions,the encapsulation of formaldehyde-melamine resin wall material can slightly reduce the crystallization rate of the solvent,but does not affect the relative crystallinity,thermal properties and discoloration sensitivity of the core *** the variety of ambient temperatures in the range of 20–35℃,the printed cotton fabrics with MCTMs could change color reversibly between different tones with good reliability and durability,and exhibit more gorgeous colors than the common thermochromic materials.

关键词： Thermochromic microcapsule Color-change range Phase-change material Crystallization behavior

Loyal wingman task execution for future aerial combat:A hierarchical prior-based reinforcement learning approach

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Chinese Journal of Aeronautics 2024年第5期37卷 462-481页

作者： Jiandong ZHANG Dinghan WANG Qiming YANG Zhuoyong SHI Longmeng JI guoqing SHI Yong WU School of Electronics and Information Northwestern Polytechnical UniversityXi’an 710129China

In modern Beyond-Visual-Range(BVR)aerial combat,unmanned loyal wingmen are pivotal,yet their autonomous capabilities are *** study introduces an advanced control algorithm based on hierarchical reinforcement learning to enhance these capabilities for critical missions like target search,positioning,and relay *** on a dual-layer model,the algorithm’s lower layer manages basic aircraft maneuvers for optimal flight,while the upper layer processes battlefield dynamics,issuing precise navigational *** approach enables accurate navigation and effective reconnaissance for lead ***,our Hierarchical Prior-augmented Proximal Policy Optimization(HPE-PPO)algorithm employs a prior-based training,prior-free execution method,accelerating target positioning training and ensuring robust target *** paper also improves missile relay guidance and promotes the effective *** integrating this system with a human-piloted lead aircraft,this paper proposes a potent solution for cooperative aerial *** experiments demonstrate enhanced survivability and efficiency of loyal wingmen,marking a significant contribution to Unmanned Aerial Vehicles(UAV)formation control *** advancement is poised to drive substantial interest and progress in the related technological fields.

关键词： Beyond-visual-range Loyal wingmen Hierarchical prior-augmented proximal policy optimization Unmanned aerial vehicles Warfare

Designing gradient nanograined dual-phase structure in duplex stainless steel for superior strength-ductility synergy

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Journal of Materials Science & Technology 2024年第3期170卷 122-128页

作者： Songsong Xu Ying Han Jiapeng Sun guoqing Zu Mingkun Jiang Weiwei Zhu Xu Ran Key Laboratory of Advanced Structural Materials Ministry of EducationChangchun University of TechnologyChangchun 130012China School of Materials Science and Engineering Changchun University of TechnologyChangchun 130012China Provincial Key Laboratory of Advanced Materials Processing and Application for Rail Transit Changchun University of TechnologyChangchun 130012China College of Mechanics and Materials Hohai UniversityNanjing 211100China

Similar to other metallic materials,duplex stainless steel dramatically loses its advantage of high ductility as they are ***,we produce a gradient nanograined dual-phase structure in the 2101 duplex stainless steel,thus facilitating a superior strength-ductility synergy:a yield strength of 1009.5 MPa being two times higher than that of the as-received sample,a total elongation of 23.4%and a uniform elongation of 5.9%.This novel structure is produced through a processing route of ultrasonic severe surface rolling and annealing,which realizes a superposition of gradient nanostructure and lamellar dual-phase structure with austenite and *** the tension deformation of gradi-ent nanograined dual-phase structured duplex stainless steel,a significant accumulation of geometrically necessary dislocations *** dislocations are formed to accommodate the deformation incompat-ibility caused by the layer-by-layer difference in strength and hardness of individual phase domains,as well as the inherent difference in properties between the austenite and ferrite *** results in a stronger hetero-deformation induced strengthening and hardening significantly contributing to superior mechanical *** study provides a new avenue to develop advanced steels with high strength and ductility.

关键词： Gradient structure Duplex stainless steel Synergetic strengthening Strength Ductility

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一种超声波透声复合材料的研究

功能材料 2020年第1期51卷 1155-1159页

作者：赵喜桢肖国庆西安建筑科技大学材料科学与工程学院西安710055 西安思源科创轨道交通技术开发有限公司西安710054

本文研究了一种超声波透声复合材料,以环氧树脂作为胶粘材料,添加声阻抗较小的金属粉末提高超声波的透声性能,添加液体橡胶CTBN增韧改性,添加硫醇类固化及脂肪胺促进剂缩短固化时间,研究出一种具有良好胶粘性、良好韧性、固化时间短、... 详细信息

本文研究了一种超声波透声复合材料,以环氧树脂作为胶粘材料,添加声阻抗较小的金属粉末提高超声波的透声性能,添加液体橡胶CTBN增韧改性,添加硫醇类固化及脂肪胺促进剂缩短固化时间,研究出一种具有良好胶粘性、良好韧性、固化时间短、超声波透过性强的功能性复合材料。为整治钢轨病害遗留轨缝造成超声波断轨实时监测系统传输通道被截断,无法发挥监测功能的问题提供了解决思路。

关键词：超声波断轨实时监测系统轨缝环氧树脂增韧改性

Microstructure Characterization of Bubbles in Gassy Soil Based on the Fractal Theory

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Journal of Ocean University of China 2024年第1期23卷 129-137页

作者： WU Chen LIN guoqing LIU Lele LIU Tao LI Chengfeng GUO Zhenqi Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Gas Hydrate Ministry of Natural ResourcesQingdao Institute of Marine GeologyQingdao 266237China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Marine Environment and Ecology Ministry of EducationOcean University of ChinaQingdao 266100China Qingdao National Laboratory for Marine Science and Technology Qingdao 266237China

The microscopic characterization of isolated bubbles in gassy soil plays an important role in the macroscopic physical properties of sediments and is a key factor in the study of geological hazards in gas-bearing *** on the box-counting method and the pore fractal features in porous media,a fractal model of bubble microstructure parameters in gassy soil under different gas con-tents and vertical load conditions is established by using an industrial X-ray CT scanning *** results show that the fractal di-mension of bubbles in the sample is correlated with the volume fraction of bubbles,and it is also restricted by the vertical *** three-dimensional fractal dimension of the sample is about 1 larger than the average two-dimensional fractal dimension of all the slices from the same *** uniform porous media fractal model is used to test the equivalent diameter,and the results show that the variation of the measured pore diameter ratio is jointly restricted by the volume fraction and the vertical *** addition,the measured self-similarity interval of the bubble area distribution is tested by the porous media fractal capillary bundle model,and the fitting curve of measured pore area ratio in a small loading range is obtained in this paper.

关键词： gassy soil bubble microstructure parameters fractal dimension vertical load

M-X Ray of Ta Excited by Highly Charged Ar and Xe Ions

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2005年第1期 118-119页

作者： ZhaoYongtao xiao guoqing Zhang xiaoan Yang Zhihu Li Fuli Chen Ximeng Zhang Yanping Zhan Wenlong 不详 Department of Applied Physics Xi＇an Jiaotong Uiversity Xi＇an China. Institute of Physics Lanzhou University Lanzhou China.

The X-ray spectra induced by the highly charged xenon and argon ions impinging on a tantalum surface are reported. The experiment was done at the ECR ion source of H1RFL. It is found that the yield of the tantalum M-X rays increases intensively as the projectile kinetic energy increasing. Moreover, the tantalum M-X ray induced by the xenon ions is higher in energy and broader in width than that induced by the argon ions (as shown in Figs. 1 and 2).

关键词：高电荷态离子 X射线激发氙气钽 Ar ECR离子源 X射线谱氩离子

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莫来石–堇青石质匣钵的制备及侵蚀机理

硅酸盐学报 2020年第6期48卷 931-938页

作者：解华婧任耘肖国庆丁冬海西安建筑科技大学材料科学与工程学院西安710055

以莫来石、堇青石、α-Al2O3、滑石和高岭土为原料制备莫来石–堇青石质匣钵,研究了匣钵的常温力学性能、抗热震性能以及LiCoO2合成过程对匣钵的侵蚀机理。结果表明:1350℃烧成匣钵试样的常温力学性能和抗热震性均较好,抗折强度为11.18 ... 详细信息

以莫来石、堇青石、α-Al2O3、滑石和高岭土为原料制备莫来石–堇青石质匣钵,研究了匣钵的常温力学性能、抗热震性能以及LiCoO2合成过程对匣钵的侵蚀机理。结果表明:1350℃烧成匣钵试样的常温力学性能和抗热震性均较好,抗折强度为11.18 MPa,热震循环3次后的残余强度保持率为44.8%。碳酸锂分解产生的Li2O与试样反应生成LiAlSiO4、Li4SiO4和LiAlO2。随着反应进行,Li2O沿气孔向试样内部扩散,反应后的渗透层结构更为致密,可阻碍Li2O进一步侵蚀试样,匣钵因而具有较强抗侵蚀性。

关键词：钴酸锂匣钵莫来石–堇青石质侵蚀机理

低SNR场景下微型无人机跟踪-检测融合方法

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仪器仪表学报 2022年第4期43卷 79-88页

作者：方鑫朱婧黄大荣张振源肖国清西南石油大学机电工程学院成都610500 重庆交通大学信息科学与工程学院重庆400074 西南石油大学化学化工学院成都610500

针对低信噪比(SNR)场景下微型无人机探测难题,本文提出了一种基于序贯蒙特卡罗-检测前跟踪(SMC-TBD)的多输入多输出雷达目标跟踪-检测融合方法。区别于跟踪和检测过程相互独立的传统方法,本文方法直接利用三维傅里叶变换后未经阈值处理... 详细信息

针对低信噪比(SNR)场景下微型无人机探测难题,本文提出了一种基于序贯蒙特卡罗-检测前跟踪(SMC-TBD)的多输入多输出雷达目标跟踪-检测融合方法。区别于跟踪和检测过程相互独立的传统方法,本文方法直接利用三维傅里叶变换后未经阈值处理的雷达原始数据,通过SMC方法计算目标累积存在概率,在实现微型无人机连续检测的同时,完成目标轨迹的高精度跟踪。本文方法的创新在于通过融合检测和跟踪过程,实现了时间-距离-多普勒-方位域目标能量累积,提高了低SNR场景下微型无人机探测性能。实验结果表明,本文方法在SNR低于-20 dB时,微型无人机跟踪性能才逐渐恶化,相比于雷达量测、扩展卡尔曼滤波和粒子滤波提升了约8 dB。

关键词：微型无人机多输入多输出雷达序贯蒙特卡罗-检测前跟踪长时间能量累积

TiC-Ti复合材料自蔓延高温合成中的组织转变

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稀有金属材料与工程 2005年第10期34卷 1592-1596页

作者：肖国庆范群成顾美转金志浩西安交通大学金属材料强度国家重点实验室

用燃烧波淬熄法研究了TiC-Ti金属陶瓷自蔓延高温合成(SHS法)中的组织转变和反应机理。淬熄试样中保留了未反应区、反应区及已反应区。用扫描电子显微镜观察了燃烧反应中的显微组织转变过程,用能谱仪分析了各微区的成分变化,测量了燃烧温... 详细信息

用燃烧波淬熄法研究了TiC-Ti金属陶瓷自蔓延高温合成(SHS法)中的组织转变和反应机理。淬熄试样中保留了未反应区、反应区及已反应区。用扫描电子显微镜观察了燃烧反应中的显微组织转变过程,用能谱仪分析了各微区的成分变化,测量了燃烧温度Tc,并用XRD分析了反应产物的相组成。实验结果表明:TiC-Ti复合材料的自蔓延高温合成机理可以用溶解-析出机制来描述;Ti首先部分熔化,C溶解在Ti液中,并和Ti发生反应生成TiCx,随着温度的升高,TiCx熔化,形成Ti-C熔体,在降温过程中,细小的TiC大量从Ti-C熔体中析出并聚集,最终形成TiC增强Ti基复合材料。

关键词： TiC-Ti 复合材料自蔓延高温合成组织转变