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Microwave Induced Ethanol Bath Bonding for PMMA Microfluidic Device

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Journal of Harbin Institute of Technology(New Series) 2016年第2期23卷 40-45页

作者： xiaowei han xiaowei Liu Li Tian He Zhang Cuicui Zhuang Key Laboratory of Micro-systems and Micro-structures Manufacturing Ministry of EducationHarbin Institute of Technology

High bonding strength,low deformation and convenient procedure are all very important aspects in the microfluidic device fabrication process. In this paper,an improved microwave induced bonding technology is proposed to fabricate microfluidic device based on methyl methacrylate( PMMA). This method employs pure ethanol as the bonding assisted solvent. The ethanol not only acts as the microwave absorbing material,but also works as the organic solvent in bath. The presented research work has shown that the bonding process can be completed in less than 45 s. Furthermore,the convenient bonding only applies microwave oven,beakers and binder clips. Then,we discuss effects of microwave power,bonding time on bonding strength and deformation of microstructures on PMMA microfluidic device. Finally,a 4 layers micro-mixer has been fabricated using the proposed bonding technique which includes 15 trapezoid micro-channels,9 T-type mix units and an X-type mix unit. Experimental results show that the proposed bonding method have some advantages compared with several traditional bonding technologies,such as hot pressing bonding,ultrasonic bonding and solvent assisted bonding methods in respect of bonding strength,deformation and bonding process. The presented work would be helpful for low coat mass production of multilayer polymer microfluidic devices in lab.

关键词： PMMA microwave bonding multilayer microfluidic device micro-mixer

An Improved RANSAC Algorithm of Color Image Stitching

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An Improved RANSAC Algorithm of Color Image Stitching

2013年中国智能自动化学术会议

作者： Weijie Huang xiaowei han School of Information and Engineering Shenyang University

Image mosaic is a technique being used to stitch multiple images together to form a stitched image with higher resolution and large field of view. This paper presents an improved RANSAC algorithm of color image mosaic. Image mosaic mainly comprises two steps,namely image registration and image *** algorithm comprises main modules,such as Harris corner detection, NCC rough matching,improved RANSAC exaction,estimating the projection transformation matrix,projection transformation,image *** improved RANSAC for feature points exaction based on statistical regularities can greatly support the real time of the *** experimental results show that the algorithm presented is fast and effective.

关键词： Image mosaic Feature point detection Improved RANSAC exaction Projection transformation Image smoothing

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产业持续竞争力的构筑与有效产业政策的支持

当代经济研究 2007年第11期 55-58页

作者：韩小威中国社会科学院经济所北京100836

产业竞争力的强弱关系到国家经济实力的盛衰,构筑产业持续竞争力是确保国家竞争力之根本。构筑产业持续竞争力之关键源于技术创新,提升技术创新能力离不开有效产业政策的支持。我国在国际竞争中具有一定比较优势的产业均为资源型和劳动... 详细信息

产业竞争力的强弱关系到国家经济实力的盛衰,构筑产业持续竞争力是确保国家竞争力之根本。构筑产业持续竞争力之关键源于技术创新,提升技术创新能力离不开有效产业政策的支持。我国在国际竞争中具有一定比较优势的产业均为资源型和劳动密集型产业,基本上不具有持续竞争的能力。构筑产业持续竞争力主要有三种途径:提升现有的比较优势、创造新的比较优势和转换比较劣势为比较优势。

关键词：产业持续竞争力产业政策

Regulation of Bacterial Growth and Behavior by Plant Immunity

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Regulation of Bacterial Growth and Behavior by Plant Immunit...

中国植物病理学会2023年学术年会

作者： Frederickson Entila han xiaowei Kenichi Tsuda

Plants are colonized by commensal, beneficial, and pathogenic bacteria that significantly affect plant health in nature and agricultural *** require bacterial colonization for their survival in nature, but ironically, some bacteria cause disease in plants, pointing to the dilemma that plants ***, the fundamental question is how plants regulate different bacteria for their ***, despite extensive studies into the molecular and genetic bases of plant immunity, we still lack fundamental knowledge of how plants actually regulate bacterial growth and behavior in *** multi—omics and molecular genetics, we uncovered several mechanisms of how plant immunity regulates the growth of the bacterial pathogen Pseudomonas *** instance, we found that plant immunity targets the bacterial iron acquisition system, the type Ⅲ secretion system, and the bacterial protein MucD, all of which are required for virulence in plants but not their growth in *** recently, we found that reactive oxygen species( ROS) generated by plants directly suppresses the typeⅡ secretion system( T2 SS) of a potentially pathogenic commensal Xanthomonas isolated from healthy Arabidopsis thaliana ***-mediated inhibition of the T2 SS converted the potentially harmful Xanthomonas into a commensal bacterium that protected plants against ***, these results suggest that plant immunity targets the virulence mechanisms of bacteria to control their behavior in plants and turns them into beneficial bacteria in some cases.

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食物饱腹感研究及其测试技术进展

食品科学 2025年第2期46卷 299-307页

作者：姚孟丽韩晓峰王若永韩小伟韩忠曾新安黄京美刘义凤苑鹏柳嘉段盛林中国食品发酵工业研究院北京100020 空军特色医学中心北京100142 中国人民解放军总医院第五医学中心北京100139 华南理工大学食品科学与工程学院广东广州510640

饱腹感,即为进食后满足感和不再渴望进食的状态,在维护正常食欲、控制体质量、预防肥胖及改善代谢性疾病方面具有重要意义。文章系统分析影响饱腹感的多种因素,包括食物成分、感官特征、能量密度、心理因素及饮食行为等,并阐述这些因素... 详细信息

饱腹感,即为进食后满足感和不再渴望进食的状态,在维护正常食欲、控制体质量、预防肥胖及改善代谢性疾病方面具有重要意义。文章系统分析影响饱腹感的多种因素,包括食物成分、感官特征、能量密度、心理因素及饮食行为等,并阐述这些因素对饱腹感的作用机制。同时,重点介绍模拟视觉量表、胃肠道激素检测及闪烁扫描等新兴技术在饱腹感测试中的应用,展示这些技术在评估饱腹感方面的科学性和有效性。此外,文章还讨论饱腹感及其测试技术的研究意义与未来展望,旨在为饱腹感相关机制的深入研究、饱腹感测试技术的创新以及高饱腹感食品的开发提供理论支持和实践参考。

关键词：饱腹感食物成分感官特征能量密度心理因素饮食行为模拟视觉量表生化指标

Stereoselective Synthesis of Z-Fluoroalkenes by Copper-Catalyzed Hydrodefluorination of gem-Difluoroalkenes with Water

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Stereoselective Synthesis of Z-Fluoroalkenes by Copper-Catal...

中国化学会第十二届全国物理有机化学学术会议

作者： Jiefeng Hu xiaowei han Yu Yuan Zhuangzhi Shi Stale Key Laboratory of Coordination Chemistry School of Chemistry and Chemical EngineeringNanjing University

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三维阶梯结构微混合器设计、制作及性能分析

哈尔滨工业大学学报 2016年第4期48卷 54-59页

作者：张贺刘晓为唐佳禄韩小为田丽微系统与微结构制造教育部重点实验室(哈尔滨工业大学) 哈尔滨150001 黑龙江工程学院电气与信息工程学院哈尔滨150001

为改善微纳尺度下流体的混合效果,在聚甲基丙烯酸甲酯（PMMA）基底材料上,设计制造了一款新型三维阶梯结构微混合器.混合器由一个T-型进样沟道和6个三维阶梯混合单元组成,采用超精密雕刻机在PMMA基片制作微米级结构,利用有机溶剂混溶浸... 详细信息

为改善微纳尺度下流体的混合效果,在聚甲基丙烯酸甲酯（PMMA）基底材料上,设计制造了一款新型三维阶梯结构微混合器.混合器由一个T-型进样沟道和6个三维阶梯混合单元组成,采用超精密雕刻机在PMMA基片制作微米级结构,利用有机溶剂混溶浸泡法,在低温常压条件下键合得到.数值仿真结果表明：混合器效率受到台阶结构尺寸和流体速度的影响,当0.1≤Re≤5时,混合腔横截面的浓度方差σ〈0.1,接近充分混合;当流速在1～20 m L/h范围内时,将混合器用于微量溶液p H的调节取得了理想的结果.

关键词：微混合器三维阶梯结构混合效率 PMMA芯片制备 pH调节

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基于光学微腔模式劈裂的角速率测量方法

北京航空航天大学学报 2015年第5期41卷 770-775页

作者：杨照华韩晓伟杨旭北京航空航天大学仪器科学与光电工程学院北京100191 清华大学低维量子物理国家重点实验室北京100084

传统的光学谐振陀螺(ROG)把背向散射作为重要误差源之一,须尽量抑制其影响.在光学谐振腔的品质因数极高时,背散光得到足够的增强,不能再被简单地视为噪声.背向散射会引发模式劈裂,所形成的劈裂模谐振频率会随腔体旋转角速率发生变化.结... 详细信息

传统的光学谐振陀螺(ROG)把背向散射作为重要误差源之一,须尽量抑制其影响.在光学谐振腔的品质因数极高时,背散光得到足够的增强,不能再被简单地视为噪声.背向散射会引发模式劈裂,所形成的劈裂模谐振频率会随腔体旋转角速率发生变化.结合Sagnac效应,修正有源光学谐振腔模式劈裂传感原理的数学模型,推导出腔体旋转角速率与劈裂值的映射关系式.通过仿真分析不同掺杂增益系数以及不同光纤锥耦合强度下的反射谱线,发现谐振腔工作在欠耦合区域更适合角速率测量.掺杂增益介质可以提高品质因数,减小谐振峰线宽,使得模式劈裂谱线更容易观测.理论与计算机仿真分析表明品质因数为108的光学微腔测量分辨率可达10-6(°)/s,所提出的角速率敏感机制很有应用前景.

关键词：光学谐振腔 Sagnac效应角速率测量背向散射模式劈裂

The Photoelectron Behaviors of Sulfur Sensitizing AgCl in the Optical Storage Process

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光学学报 2003年第S1期23卷 865-866页

作者： Shaopeng Yang, Xiaodong Lu, xiaowei Li, Li han, Guangsheng Fu Physical science and technology of Hebei University Baoding P.R.China, Tel: 086-312-5079355, fax: 086-312-5011174 Physical science and technology of Hebei University Baoding P.R.China

Using Microwave Dielectric Spectrum Detection Technology (MDSD) detects the instantaneous decay processes of free electrons and shallow trapped electrons of cubic AgCl at the same time. The best condition of our exper... 详细信息

关键词： AgCl of in