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Determination of physical properties for the mixtures of [BMIM]Cl with different organic solvents

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Chinese Journal of Chemical Engineering 2015年第5期23卷 804-811页

作者： Hina Saba xinjun zhu Ye Chen Yumei Zhang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University Department of Material and Engineering Luoyang Institute of Science and Technology

Physical properties including refractive index, density, viscosity and conductivity for binary mixtures of l-butyl- 3-methyl imidazolium chloride （[BMIM]CI） and different organic solvents at 298.15 K have been investigated. Ex- cess molar volumes have been calculated and obtained data has been fitted by the Redlich-Kister equation. The density and refractive index were found to increase with increasing concentration of [BMIM]CI, however, excep- tions do exist as in the case of dimethyl sulfoxide （DMSO）/[BMIM]CI. For DMSO/[BMIM]CI, the density decreases with increasing concentration. The addition of different organic solvents was able to disrupt the interactions within mixtures, leading to free mobility of ions. The free mobility of ions has been found to enhance conductivity and decrease viscosity to varying extents in all mixtures studied. It has been observed that solubility parameters, dielectric constants and composition of the solvents used play a vital role in determining the resultant properties. The data obtained will play an important role in understanding the effect of the addition of organic solvents in ILs to enhance their applicability.

关键词： Ionic liquid Viscosity Conductivity Refractive index Density Binary mixtures Organic solvents

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基于区域立体匹配的单频条纹结构光三维测量

激光与光电子学进展 2024年第10期61卷 137-145页

作者：朱新军孙瑞群侯林鹏赵海川宋丽梅王红一天津工业大学人工智能学院天津300387 天津工业大学控制科学与工程学院天津300387

为克服传统质量导向相位展开方法无法正确展开多孤立物体的局限性,提出一种基于区域分割的立体质量导向相位展开方法。该方法将包裹相位分割为多个区域,并为每个孤立区域通过立体匹配算法确立左右相机多视图相位展开初始点,通过质量导... 详细信息

为克服传统质量导向相位展开方法无法正确展开多孤立物体的局限性,提出一种基于区域分割的立体质量导向相位展开方法。该方法将包裹相位分割为多个区域,并为每个孤立区域通过立体匹配算法确立左右相机多视图相位展开初始点,通过质量导向相位展开算法实现多视图孤立物体相位展开。进一步提出了基于区域双目立体展开相位匹配的单频条纹结构光三维(3D)测量,实现了单个频率包裹相位下的多孤立物体3D重建。实验结果表明,所提方法可以实现多孤立物体运动状态的3D重建,在四步相移和单幅条纹图条件下重建标准球的直径平均绝对值偏差分别为0.0135 mm和0.0347 mm。

关键词：三维重建质量导向结构光立体匹配相位展开

Wavelet based deep learning for depth estimation from single fringe pattern of fringe projection profilometry

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Optoelectronics Letters 2022年第11期18卷 699-704页

作者： zhu xinjun HAN Zhiqiang SONG Limei WANG Hongyi WU Zhichao School of Artificial Intelligence Tiangong UniversityTianjin 300387China

Depth estimation from single fringe pattern is a fundamental task in the field of fringe projection three-dimensional(3D) measurement. Deep learning based on a convolutional neural network(CNN) has attracted more and more attention in fringe projection profilometry(FPP). However, most of the studies focus on complex network architecture to improve the accuracy of depth estimation with deeper and wider network architecture, which takes greater computational and lower speed. In this letter, we propose a simple method to combine wavelet transform and deep learning method for depth estimation from the single fringe pattern. Specially, the fringe pattern is decomposed into low-frequency and high-frequency details by the two-dimensional(2D) wavelet transform, which are used in the CNN network. Experiment results demonstrate that the wavelet-based deep learning method can reduce the computational complexity of the model by 4 times and improve the accuracy of depth estimation. The proposed wavelet-based deep learning models(UNet-Wavelet and hNet-Wavelet) are efficient for depth estimation of single fringe pattern, achieving better performance than the original UNet and hNet models in both qualitative and quantitative evaluation.

关键词： measurement network estimation

Poly(PEGMA) magnetic nanogels:Preparation via photochemical method,characterization and application as drug carrier

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Science China Chemistry 2009年第1期52卷 69-75页

作者： SUN HanWen ZHANG LianYing zhu xinjun KONG ChunYan ZHANG CunLan YAO SiDe Department of Chemistry Dezhou UniversityDezhou 253023China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

One-pot synthesis of magnetic nanogels with excellent biocompatibility via the photochemical method is reported in this ***(PEGMA) modified superparamagnetic nanogels(poly(PEGMA) magnetic nanogels) were synthesized by in-situ polymerization using poly(ethylene glycol) methacrylate(PEGMA) as the monomer and N,N'-methylene-bis-(acrylamide)(MBA) as the cross-linking agent in magnetite aqueous suspension under UV *** surface functional groups and components of magnetic nanogels were analyzed by Fourier transform infrared spectroscopy(FTIR) and a thermogra-vimetric analyzer(TGA).The results indicated that the poly(PEGMA) magnetic nanogels were synthe-sized successfully by coating poly(PEGMA) on the Fe3O4 nanoparticles under UV irradiation,and the Fe3O4 nanoparticles content in this nanogels was above 50 wt%.The morphology,size,zeta-potential and magnetic property were also *** magnetic nanogels had a nearly spherical shape and core-shell structure,the average size in aqueous system measured by photon correlation spec-troscopy(PCS) was 68.4 nm,which was much bigger than that in the dry state,the nanogels behaved superparamagnetically with saturated magnetization of 58.6 emu/g,and the zeta-potential was-16.3-_17.3 mV at physiological pH(6.8-7.4) which could help to maintain stability in *** preliminary application as drug carrier was made and the doxorubicin-loaded magnetic nanogels had an excellent property in *** experiment indicated that the magnetic nanogel was an ideal candidate carrier in target drug delivery systems and other biomedical application.

关键词： magnetic nanogels photochemical polymerization poly(ethylene glycol) methacrylate drug carrier doxorubicin

3D velocity field reconstruction of gas-liquid two-phase flow based on space-time multi-scale binocular-PIV technology

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Optoelectronics Letters 2022年第10期18卷 613-617页

作者： WANG Hongyi DOU Gongcheng ZHANG Hao zhu xinjun SONG Limei Tianjin Key Laboratory of Intelligent Control of Electrical Equipment School of Artificial IntelligenceTiangong UniversityTianjin300387China Tianjin Key Laboratory of Intelligent Control of Electrical Equipment School of Control Science and EngineeringTiangong UniversityTianjin300387China

For particle image velocimetry(PIV) technique, the two-dimensional(2D) PIV by one camera can only obtain 2D velocity field, while three-dimensional(3D) PIV based on tomography by three or four cameras is always complex and expensive. In this work, a binocular-PIV technology based on two cameras was proposed to reconstruct the 3D velocity field of gas-liquid two-phase flow, which is a combination of the binocular stereo vision and cross-correlation based on fast Fourier transform(CC-FFT). The depth of particle was calculated by binocular stereo vision on space scale, and the plane displacement of particles was acquired by CC-FFT on time scale. Experimental results have proved the effectiveness of the proposed method in 3D reconstruction of velocity field for gas-liquid two-phase flow.

关键词： flow flow phase

Phase unwrapping based on deep learning in light field fringe projection 3D measurement

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Optoelectronics Letters 2023年第9期19卷 556-562页

作者： zhu xinjun ZHAO Haichuan YUAN Mengkai ZHANG Zhizhi WANG Hongyi SONG Limei School of Artificial Intelligence Tiangong UniversityTianjin 300387China Tianjin Key Laboratory of Intelligent Control of Electrical Equipment Tiangong UniversityTianjin 300387China School of Control Science and Engineering Tiangong UniversityTianjin 300387China

Phase unwrapping is one of the key roles in fringe projection three-dimensional(3D)measurement *** propose a new method to achieve phase unwrapping in camera array light filed fringe projection 3D measurement based on deep learning.A multi-stream convolutional neural network(CNN)is proposed to learn the mapping relationship between camera array light filed wrapped phases and fringe orders of the expected central view,and is used to predict the fringe order to achieve the phase *** are performed on the light field fringe projection data generated by the simulated camera array fringe projection measurement system in Blender and by the experimental 3×3 camera array light field fringe projection *** performance of the proposed network with light field wrapped phases using multiple directions as network input data is studied,and the advantages of phase unwrapping based on deep learning in light filed fringe projection are demonstrated.

关键词： Phase unwrapping based on deep learning in light field fringe projection 3D measurement

Solution for vision occlusion based on binocular line-structured light

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Optoelectronics Letters 2021年第7期17卷 432-437页

作者： WU Zhichao WEI Xiaoxin SONG Limei zhu xinjun Key Laboratory of Intelligent Control of Electrical Equipment TianGong UniversityTianjin 300387China

Aiming at the problem of the loss of 3 D point cloud, due to the occlusion of the field of view in the 3 D measurement process, a measurement scheme based on line-structured light with dual-camera is given. In addition, in the line-structured light measurement technology, the traditional light plane calibration is more complicated, and the three-dimensional measurement accuracy is relatively low. For this reason, this paper used the binocular polar line constraint to calibrate the physical parameters of the light plane. Experimental results show that the dual-camera measurement system can obtain high-precision global measurement results. The maximum measurement error is 0.091 51 mm, and the average measurement error is 0.076 05 mm. Compared with the traditional binocular matching method and the traditional laser triangulation method, this method can deal with the problem of field occlusion more effectively, thereby reducing the loss of measurement information in the measurement process.

关键词： light occlusion thereby

有机硅树脂对不烧铝碳滑板中温性能的影响研究

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耐火与石灰 2024年第1期49卷 20-24页

作者：黄晨朱新军曾立民曾昆吕建江湖南湘钢瑞泰科技有限公司湘潭411102

通过在酚醛树脂中添加有机硅树脂作为复合结合剂,利用X射线衍射仪、扫描电子显微镜和能谱仪对不烧铝碳滑板的物相、形貌和微区成分进行分析,研究了有机硅树脂的加入对不烧铝碳滑板中温性能的影响。研究结果表明:有机硅树脂能有效减小不... 详细信息

通过在酚醛树脂中添加有机硅树脂作为复合结合剂,利用X射线衍射仪、扫描电子显微镜和能谱仪对不烧铝碳滑板的物相、形貌和微区成分进行分析,研究了有机硅树脂的加入对不烧铝碳滑板中温性能的影响。研究结果表明:有机硅树脂能有效减小不烧铝碳滑板的体积密度与显气孔率波动,添加1%有机硅树脂时不烧铝碳滑板具有较好的综合性能;酚醛树脂在600℃时已基本脱氢碳化,有机硅树脂在600℃下仍具有较高的结合强度,可以有效防止不烧铝碳滑板中温强度低谷的出现;有机硅树脂可以促进不烧铝碳滑板在中温条件下晶须的生成,对不烧铝碳滑板的中温性能起积极作用。

关键词：不烧铝碳滑板有机硅树脂酚醛树脂中温性能

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陶瓷燃烧器用莫来石-堇青石组合砖的研制

耐火材料 2006年第2期40卷 117-119页

作者：朱新军姚建材湘潭钢铁集团有限公司耐火材料厂湘潭411102

以烧结莫来石、电熔莫来石、合成堇青石和电熔白刚玉为主要原料,通过浇注-离心成型工艺生产了莫来石-堇青石组合砖,并研究了堇青石的加入量和加入形式对莫来石-堇青石组合砖性能的影响。结果表明:采用浇注-离心成型工艺生产的热风炉陶... 详细信息

以烧结莫来石、电熔莫来石、合成堇青石和电熔白刚玉为主要原料,通过浇注-离心成型工艺生产了莫来石-堇青石组合砖,并研究了堇青石的加入量和加入形式对莫来石-堇青石组合砖性能的影响。结果表明:采用浇注-离心成型工艺生产的热风炉陶瓷燃烧器用组合砖的性能指标优于机压成型的同类产品;随着试样中堇青石含量的增加,制品的荷重软化开始温度逐渐降低,抗热震性逐渐提高,但在堇青石加入量(质量分数,下同)为15%时,其荷重软化开始温度和抗热震性指标都比较好;当颗粒加入量为12%,细粉加入量为3%时,制品的抗热震性最好,耐压强度也较高。产品在广州钢铁企业集团有限公司等钢厂的陶瓷燃烧器上进行了使用试验,用户反映该组合砖强度高,整体性好,能满足大、中型热风炉燃烧器使用需要,值得大力推广。

关键词：陶瓷燃烧器莫来石-堇青石组合砖浇注离心成型