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Recycle Adsorption of Cu2＋ on Amine-functionalized Mesoporous Silica Monolithic

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Chemical Research in Chinese Universities 2013年第4期29卷 793-797页

作者： ZHAO Da-zhou JING Shu-bo XU Jia-ning yang Hong zheng wei SONG Tian-you ZHANG Ping State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China

3-Aminopropyltriethoxysilane functionalized worm-like mesoporous silica monolithic（WMSM-NH2） was prepared and used as a new regenerable adsorbent for the removal of Cu2＋ ions. The analysis results show that the WMSM-NH2 monolithic had a high efficiency value of 99.3% for Cu2＋ remediation when the Cu2＋ solution was at an initial concentration of 10.32 mg/L. The regeneration study of the WMSM-NH2 monolithic presented that the adsorp- tion efficiency of 89.0% was remained and a mass of 92.0% was left after seven adsorption-desorption cycles were executed. The monolithic material with high resistance to the acid and good mechanical stability can facilitate the operations of adsorption and regeneration of the adsorbent.

关键词： Amine-functionalized mesoporous silica monolithic(WMSM-NH2) Cu2+ removal Multiple cycle Adsorp- tion Easy operation

Effect of preload force on heat generation of fatigue crack in ultrasonic infrared thermography

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Journal of Central South University 2022年第6期29卷 1906-1915页

作者： yang zheng-wei KOU Guang-jie ZHOUwei ZHANGwei WANG Zhen LIU Jun-li LI Yin School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China Xi’an Research Institute of High Technology Xi’an 710025China China Aerodynamics Research and Development Center(CARDC) Mianyang 621000China

The heat generation behaviors of fatigue crack are deeply investigated under different preload forces combing numerical simulation and ***,a multi-contact simulation model is applied to stimulate the crack surfaces contact and the horn-sample contact under ultrasonic excitation for calculating the temperature ***,the ultrasonic infrared thermography testing and the microscope testing are carried out for the heat generation and the plastic deformation behaviors of crack region under different preload *** this basis,an indirect observation method based on dots distribution is proposed to estimate the plastic deformation on crack contact *** obtained results show that the temperature rise of crack region increases with the increase of preload force when the preload force is less than 250 N,while the temperature rise rapidly declines due to the plastic deformation on crack contact surfaces and the inhibition effect when the preload force is 280 ***,the plastic deformation does not lead to the crack propagation,but reduces the detection repeatability of fatigue *** work provides an effective method for optimizing testing conditions in practical testing processes,which will be helpful to the establishment of testing standards for batches of test objects in ultrasonic infrared thermography testing.

关键词： ultrasonic infrared thermography preload force heat generation fatigue crack dots distribution

Precise gradient separation of nanoparticles using reduced graphene oxide-polyoxomolybdate membranes

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Science China Chemistry 2025年第01期 209-216页

作者： Yixin yang Wanlei Zhao Ruoxuan zheng Hongqiang Li wei Chen Yu-Fei Song State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Quzhou Institute for Innovation in Resource Chemical Engineering

The purification and size sieving of nanoparticles （NPs） represents a significant scientific ***,the r GO-polyoxometalates (POMs=PMo12,Mo132and Mo368) membranes were fabricated successfully via a simple and scalable POMsassisted in-situ photoreduction *** the mass ratio of r GO to PMo12was 1:30,the resultant r GO-PMo12membranes with highly ordered and uniform nanochannels of 1.0 nm can be obtained,which showed an accurate carbon quantum dots（CQDs） separation with a cut-off size approximately 1.0 *** increase of the size of the interlayered POMs from PMo12（1.0 nm）,{Mo132}（2.9 nm） to{Mo368}（3.8 nm）,the resultant r GO-PMo12,r GO-Mo132and r GO-Mo368exhibited precise gradient separation of CQDs and Au nanoparticles by size exclusion *** results pave a promising way to construct new twodimensional （2D） membranes for highly efficient size-selective separation.

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Small modifications of endo-functionalized cavities lead to large changes in molecular interaction in water

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Science China Chemistry 2025年第1期 369-376页

作者： Song-Meng Wang Hao Nian Yan-Fang Wang Li-Shuo zheng Yu-Tao zheng Yi-wei Dong Liping Huang Xiaoping Wang wei Jiang Liu-Pan yang Department of Chemistry Southern University of Science and Technology School of Chemistry and Pharmaceutical Sciences State Key Laboratory for Chemistry and Molecular Engineering of Medicinal ResourcesGuangxi Normal University School of Pharmaceutical Science Hengyang Medical School University of South China

Studying molecular recognition in aqueous environments is crucial for understanding biological processes. Herein, we present a series of N-doped endo-functionalized anthracene-based cavities by introducing inward-directed pyridine units. The subtle modifications can significantly affect the binding properties of these receptors, which is similar to the mutations in biological systems. Combining theoretical calculations and molecular recognition experiments demonstrated that these “mutations” have an impact on the hydrophobicity and charge distribution of the hosts, consequently significantly influencing molecular *** is crucial for understanding the intricate mechanisms of molecular-level interactions in biological receptors.

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固体火箭发动机壳体脱黏缺陷的热波检测

深圳大学学报（理工版） 2012年第3期29卷 252-257页

作者：宋远佳张炜杨正伟田干第二炮兵工程大学203室西安710025

基于热波技术,对固体火箭发动机复合材料壳体/绝热层脱黏缺陷进行检测研究,采用去除背景和分水岭方法对热图进行降噪、增强和分割处理,利用表面热斑区域的面积对缺陷尺寸进行估算,根据热图序列的时间特征计算缺陷的深度,并与声-超声检... 详细信息

基于热波技术,对固体火箭发动机复合材料壳体/绝热层脱黏缺陷进行检测研究,采用去除背景和分水岭方法对热图进行降噪、增强和分割处理,利用表面热斑区域的面积对缺陷尺寸进行估算,根据热图序列的时间特征计算缺陷的深度,并与声-超声检测结果进行比较.结果表明,热波技术检测速度快,20 s可对缺陷准确定位,检测结果直观;5 mm深的3个缺陷最佳检测时间均为7 s;缺陷深度通过材料参数和缺陷尺寸进行计算,且缺陷越大,误差越小;与声-超声技术相比,热波检测更适合进行定量分析.

关键词：复合材料固体火箭发动机脱黏热波无损检测图像处理缺陷识别

Joint Probabilistic Scheduling and Resource Allocation for Wireless Networked Control Systems

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 258-260页

作者： Meng zheng Lei Zhang wei Liang IEEE the State Key Laboratory of Robotics and the Key Laboratory of Networked Control Systems Shenyang Institute of Automation Chinese Academy of Sciences the University of Chinese Academy of Sciences

Dear Editor,This letter presents a joint probabilistic scheduling and resource allocation method(PSRA) for 5G-based wireless networked control systems(WNCSs). As a control-aware optimization method, PSRA minimizes the linear quadratic Gaussian(LQG) control cost of WNCSs by optimizing the activation probability of subsystems, the number of uplink repetitions, and the durations of uplink and downlink phases. Simulation results show that PSRA achieves smaller LQG control costs than existing works.

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Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie Wang wei Wang Xuheng Chen Junfang Bao Qiuyue Hao Heng zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

基于超声热波技术的复合材料冲击损伤检测研究

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固体火箭技术 2013年第6期36卷 836-841页

作者：张炜罗文源王冬冬杨正伟田干第二炮兵工程大学 63612部队

采用超声热波技术对复合材料冲击损伤进行了检测研究。采用数值分析模拟了超声激励下复合材料冲击损伤部位的摩擦生热及热传导过程,分析了不同类型损伤的生热情况。在制作试件并进行低速冲击试验的基础上,利用超声热波检测系统对其进行... 详细信息

采用超声热波技术对复合材料冲击损伤进行了检测研究。采用数值分析模拟了超声激励下复合材料冲击损伤部位的摩擦生热及热传导过程,分析了不同类型损伤的生热情况。在制作试件并进行低速冲击试验的基础上,利用超声热波检测系统对其进行检测,并对检测结果的影响因素进行了分析。结果表明,超声热波技术可快速有效地检测到复合材料冲击损伤;加载接触力为200 N,加载幅值为100%时检测效果最好;冲击损伤类型基体开裂、纤维断裂及分层在红外热图中具有不同的表现形式。

关键词：超声热波技术复合材料冲击损伤检测

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界面贴合型缺陷的超声红外热波检测与识别

四川大学学报（工程科学版） 2013年第2期45卷 167-175页

作者：金国锋张炜杨正伟宋远佳田干第二炮兵工程大学动力工程系陕西西安710025 中国空气动力研究与发展中心四川绵阳621000

为了实现对复合材料内部界面贴合性缺陷的快速检测和识别,采用超声红外热波方法进行了检测研究。建立了一个含有表面微裂纹、边缘垂直裂纹、分层、脱粘等4种缺陷类型界面贴合型缺陷的复合材料有限元模型,进行了超声热波检测数值仿真。... 详细信息

为了实现对复合材料内部界面贴合性缺陷的快速检测和识别,采用超声红外热波方法进行了检测研究。建立了一个含有表面微裂纹、边缘垂直裂纹、分层、脱粘等4种缺陷类型界面贴合型缺陷的复合材料有限元模型,进行了超声热波检测数值仿真。并分别制作了碳纤维增强复合材料分层损伤试件、玻璃纤维复合材料疲劳裂纹试件和T700/BA202环氧树脂基复合材料冲击损伤试件,开展了超声红外热波检测实验和缺陷识别研究。结果表明,超声热波方法适合于复合材料裂纹、分层、冲击损伤等界面贴合型缺陷的快速检测和识别,而对脱粘等非界面贴合型缺陷则无检测效果。微小裂纹(0.001 m)可以被检测出,对浅表面(0.001 m深)缺陷的识别精度达95%,且裂纹越长,裂纹面越大越容易被检出,对0.002 m长的裂纹的检测误差为13.88%,与超声C扫方法相比,超声热波方法对冲击损伤大小的识别误差为5.7%。

关键词：超声红外热波技术复合材料界面贴合型缺陷无损检测缺陷识别