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Mathematical Modeling and Simulation of Antibubble Dynamics

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Numerical Mathematics(Theory,Methods and Applications) 2020年第1期13卷 81-98页

作者： Junxiang Yang yibao li Darae Jeong Junseok Kim Department of Mathematics Korea UniversitySeoul 02841Republic of Korea School of Mathematics and Statistics Xi’an Jiaotong UniversityXi’an 710049China Department of Mathematics Kangwon National UniversityGangwon-do 24341Republic of Korea

In this study,we propose a mathematical model and perform numerical simulations for the antibubble *** antibubble is a droplet of liquid sur-rounded by a thin film of a lighter liquid,which is also in a heavier surrounding *** model is based on a phase-field method using a conservative Allen–Cahn equa-tion with a space-time dependent Lagrange multiplier and a modified Navier–Stokes *** this model,the inner fluid,middle fluid and outer fluid locate in specific diffusive layer regions according to specific phase filed(order parameter)*** we represent the antibubble with conventional binary or ternary phase-field models,then it is difficult to have stable thin ***,the proposed approach can prevent nonphysical breakup of fluid film during the *** numerical tests are performed to verify the efficiency of the proposed model.

关键词： Antibubble conservative Allen-Cahn equation Navier-Stokes equation

基于车身模态运动及作动力分配权重的半主动悬架控制方法

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汽车零部件 2024年第4期 48-53页

作者：李奕宝罗谢盼樊义祥广州汽车集团股份有限公司汽车工程研究院广东广州511434

针对整车半主动悬架减振器作动力的分配问题,本文根据车身的模态运动建立了常规分配方法,并以此为基础提出一种全新的基于车身模态运动权重的分配策略。通过仿真求解非线性频率响应,权重高的模态运动对应的幅频特性得到了进一步优化。... 详细信息

针对整车半主动悬架减振器作动力的分配问题,本文根据车身的模态运动建立了常规分配方法,并以此为基础提出一种全新的基于车身模态运动权重的分配策略。通过仿真求解非线性频率响应,权重高的模态运动对应的幅频特性得到了进一步优化。随后又使用比利时随机路谱进行仿真,通过调整权重,可以实现车身侧倾控制和俯仰控制的明显优化。基于权重的分配方法简单有效,不依赖车辆参数,更具普适性,能与其他控制算法相互补充,具有较大应用场景。

关键词：天棚控制模态运动作动力分配

Constructing supramolecular nanostructure by hydrogen-bonding

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Chinese Science Bulletin 2008年第10期53卷 1613-1616页

作者： li yibao ZENG QingDao WANG ZhiHui QI GuiCun GUAN li FAN Xiaolin WANG Chen College of Chemistry and life Science Gannan Normal University Ganzhou 341000 China National Center of Nanoscience and Technology Beijing 100080 China

The diquinoxalino (2.3-2′.3′-a.c) phenazine (DQP), containing 6 nitrogen atoms, was synthesized, and its adsorption and self-assembling behavior on highly oriented pyrolytic graphite (HOPG) was studied by scanning tunneling microscopy (STM) under ambient conditions. With 1,14-tetradecanedioic acid as a bridge, uniform two-dimensional arrays of 1,14-tetradecanedioic acid/DQP nanostructure were successfully fabricated. The result illustrates that it is possible to construct and control supramolecular nanostructure by intermolecular hydrogen-bonding.

关键词： STM 氢键自我组核装置超分子纳米结构纳米重建结构

Hydrogen bonding networks controllable by the substitution position of tetrathiafulvalene on the pyridine ring

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Chinese Chemical Letters 2019年第3期30卷 767-770页

作者： Jing Xu yibao li Lejia Wang Xiaoyang Zhu Xunwen Xiao Yanfang Geng Ke Deng Qingdao Zeng CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology (NCNST) Key Laboratory of Organo-pharmaceutical Chemistry InstitutionGannan Normal University College of Chemical Engineering Ningbo University of Technology

Tetrathiafulvalene(TTF), as a classical building unit, has attracted considerable attention, especially its functional derivatives. Hydrogen bonding(H-bonding) networks are a class of traditional and stable nanostructures, which play an important role in two-dimensional self-assembly and multi-component co-assembly. In this paper, we studied the regulation of H-bonding networks by functional groups in TTF derivatives. The results indicate that the position of pyridine on TTF not only affects their self-assembly structures in different solvents, but also controls the H-bonding networks through different mechanisms. Both para-TTF and meta-TTF molecules show different co-assembled structures with solvents depending on whether or not the presence of carboxylic acid group. On the pre-prepared H-bonding networks formed by famous 1,3,5-tris(10-carboxydecyloxy)-benzene(TCDB) molecule, both para-TTF and meta-TTF disturbed the original network structures with different degree of TCDB deformation. The formed new H-bonding networks with or without TTF derivatives participation are mainly attributed to the position of pyridine in TTF-based molecules. These results would be important for design of exceptional and functional nanostructures starting with the design of building block.

关键词： Tetrathiafulvalene Pyridine Solvent Network Self-assembly

Synergistic regulation of intermolecular interactions to control chiral structures for chiral recognition

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Chinese Chemical Letters 2023年第3期34卷 332-336页

作者： Weilin Chen Lulu Fu Zhiqiang Zhu Jingyan liu linxiu Cheng Zhou Xu Hao Dong Jing Ma yibao li Xiaolin Fan Key Laboratory of Organo-pharmaceutical Chemistry Gannan Normal UniversityGanzhou 341000China Key Laboratory of Mesoscopic Chemistry of Ministry of Education School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Kuang Yaming Honors School and Institute for Brain Sciences Nanjing UniversityNanjing 210023China

Understanding the regulatory mechanism of self-assembly processes is a necessity to modulate nanostructures and their properties. Herein, we have studied the mechanism of self-assembly in the C3 symmetric 1,3,5-benzentricarboxylic amino acid methyl ester enantiomers(TPE) in a mixed solvent system consisting of methanol and water. The resultant chiral structure was used for chiral recognition. The formation of chiral structures from the synergistic effect of multiple noncovalent interaction forces was confirmed by various techniques. Molecular dynamics simulations were used to characterize the time evolution of TPE structure and properties in solution. The theoretical results were consistent with the experimental results. Furthermore, the chiral structure assembled by the building blocks of TPE molecules was highly stereoselective for diamine compounds.

关键词： Supramolecular chemistry Chiral nanostructure Noncovalent interaction forces Molecular dynamics simulations Chiral recognition

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从“滴水成画”和超疏水“水泵”认识表面能

赣南师范大学学报 2024年第3期45卷 61-66页

作者：陈静杨佳怡王琴郭涵李亿保吴玲琴钟金莲周中高李永东赣南师范大学化学化工学院江西省高校功能材料化学重点实验室江西赣州341000

利用绿色能源替代化石燃料是实现“碳中和”目标的重要途经.与风能和太阳能类似,表面能也是一种高度分散的能量,其利用和转换引起了人们的关注.本实验利用“滴水成画”展示马兰戈尼效应,利用超疏水“水泵”展示表面的亲疏水性能,通过游... 详细信息

利用绿色能源替代化石燃料是实现“碳中和”目标的重要途经.与风能和太阳能类似,表面能也是一种高度分散的能量,其利用和转换引起了人们的关注.本实验利用“滴水成画”展示马兰戈尼效应,利用超疏水“水泵”展示表面的亲疏水性能,通过游戏和自己动手实验,可直观地认识表面能,观察表面能与动能和重力势能相互转化的过程,展示表面能与生活的紧密联系,以及表面能为人类生活带来的便利和危害.

关键词：表面能表面张力亲水性超疏水性

Mass transfer process of peanut protein extracted by bis(2-ethylhexyl)sodium sulfosuccinate reverse micelles

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Grain & Oil Science and Technology 2024年第1期7卷 60-67页

作者： Chenxian Yang Tianci li Tingwei Zhu Xiaojie Duan yibao Chen Yandong Xu Fusheng Chen Kunlun liu College of Food Science and Engineering Henan University of TechnologyZhengzhouHenan 450001China

The liquid-liquid extraction method using reverse micelles can simultaneously extract lipid and protein of oilseeds,which have become increasingly popular in recent ***,there are few studies on mass transfer processes and models,which are helpful to better control the extraction process of oils and *** this paper,mass transfer process of peanut protein extracted by bis(2-ethylhexyl)sodium sulfosuccinate(AOT)/isooctane reverse micelles was *** effects of stirring speed(0,70,140,and 210 r/min),temperature of extraction(30,35,40,45,and 50℃),peanut flour particle size(0.355,0.450,0.600,and 0.900 mm)and solidliquid ratio(0.010,0.0125,0.015,0.0175,and 0.020 g/mL)on extraction rate were *** results showed that extraction rate increased with temperature rising,particle size reduction as well as solid-liquid ratio increase respectively,while little effect of stirring speed(P>0.05)was *** apparent activation energy of extraction process was calculated as 10.02 kJ/mol and Arrhenius constant(A)was 1.91 by Arrhenius *** was a linear relationship between reaction rate constant and the square of the inverse of initial particle radius(1/r_(0)^(2))(Pline with the first order *** transfer kinetics of peanut protein extracted by reverse micelles was established and it was verified by experimental *** results provide an important theoretical guidance for industrial production of peanut protein separation and purification.

关键词： AOT reverse micelles Peanut protein Kinetics Shrinking core model Mass transfer

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物化型软岩微结构单元特征及其胀缩性研究

岩石力学与工程学报 2006年第6期25卷 1265-1269页

作者：柴肇云康天合李义宝太原理工大学采矿工艺研究所山西太原030024

在对物化型软岩的物质组成、矿物结构及其失水–吸水过程的物理力学机制研究的基础上,提出物化型软岩由硬质砂粒–黏土矿物叠层构成的四面体微结构单元的胀缩几何模型,建立相应的胀缩几何方程。所建立的胀缩方程为定量进行软岩胀缩性能... 详细信息

在对物化型软岩的物质组成、矿物结构及其失水–吸水过程的物理力学机制研究的基础上,提出物化型软岩由硬质砂粒–黏土矿物叠层构成的四面体微结构单元的胀缩几何模型,建立相应的胀缩几何方程。所建立的胀缩方程为定量进行软岩胀缩性能的研究提供理论基础,但这个胀缩方程的具体应用还有待于对各类软岩的成分组成、各类黏土矿物的结构特征以及胀缩性能参数等进行进一步的定量研究。

关键词：岩石力学物化型软岩黏土矿物单元模型胀缩方程

Development of an optical probe to measure the flattened area of ocular cornea

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Chinese Optics Letters 2010年第1期8卷 103-106页

作者：张学勇马建国卢荣胜李义宝唐震刘果红 School of Instrument Science and Opto-Electronic Engineering Hefei University of Technology Department of Mathematics and Physics Anhui University of Architecture Department of Physics Huainan Normal University

The optical probe in tonometers is a key component in measuring the flattened diameter or area of the ocular cornea. A new kind of optical probe for the direct measurement of the flattened area of the ocular cornea is presented. The optical probe uses the cone prism with a modulating flake of light intensity as its measuring body. The test results on simulated eyeballs with different radii of curvature of the ocular cornea show that there is a linear relation between the flattened area of the ocular cornea and the normalized current. The optical probe, which is more compact compared with existing optical probes and easily configured with its coaxiality of optical parts, may be an excellent probe for constructing a low-cost, miniaturized applanation tonometer.

关键词： Optics Physics