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On the applicability of different adhesion models in adhesive particulate flows

Guanqing LIU, Shuiqing LI, Qiang YAO,

《能源前沿（英文）》 2010年 第4卷 第2期   页码 280-286 doi: 10.1007/s11708-009-0062-5

摘要： An adhesion map provides quantitative criteria for the appropriate selection of adhesion models applicable to a specific adhesive contact problem of fine particles in complex particulate flows. In this paper, three different general adhesion models are used to construct adhesion maps. The applicable regimes on the adhesion map for different approximate adhesion models are determined according to their underlying limitations. It is found that the choice of general model has limited influence on the structure of a constructed adhesion map. On the contrary, the regime of application for each approximate model is sensitive to the approximation level. A three-dimensional, more intuitive adhesion map based on physical parameters of particles is also built. Finally, recent applications of adhesion models in discrete element method (DEM) investigations of fine-particle flow dynamics are briefly discussed.

关键词： adhesive contact     van der Waals force     adhesion model     adhesion map     DEM    

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Materials and surface engineering to control bacterial adhesion and biofilm formation: A review of recent

Huan GU, Dacheng REN

《化学科学与工程前沿（英文）》 2014年 第8卷 第1期   页码 20-33 doi: 10.1007/s11705-014-1412-3

摘要： Bacterial adhesion to surfaces and subsequent biofilm formation are a leading cause of chronic infections and biofouling. These processes are highly sensitive to environmental factors and present a challenge to research using traditional approaches with uncontrolled surfaces. Recent advances in materials research and surface engineering have brought exciting opportunities to pattern bacterial cell clusters and to obtain synthetic biofilms with well-controlled cell density and morphology of cell clusters. In this article, we will review the recent achievements in this field and comment on the future directions.

关键词： surface engineering     materials     bacterial adhesion     biofilm     control     review    

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Effect of interface adhesion factor on the bearing capacity of strip footing placed on cohesive soil

《结构与土木工程前沿（英文）》 2021年 第15卷 第6期   页码 1494-1503 doi: 10.1007/s11709-021-0768-y

摘要： The problem related to bearing capacity of footing either on pure soil or on pure rock mass has been investigated over the years. Currently, no study deals with the bearing capacity of strip footing on a cohesive soil layer overlying rock mass. Therefore, by implementing the lower bound finite element limit analysis in conjunction with the second-order cone programming and the power cone programming, the ultimate bearing capacity of a strip footing located on a cohesive soil overlying rock mass is determined in this study. By considering the different values of interface adhesion factor (αcr) between the cohesive soil and rock mass, the ultimate bearing capacity of strip footing is expressed in terms of influence factor (If) for different values of cohesive soil layer cover ratio (Tcs/B). The failure of cohesive soil is modeled by using Mohr−Coulomb yield criterion, whereas Generalized Hoek−Brown yield criterion is utilized to model the rock mass at failure. The variations ofIf with different magnitudes of αcr are studied by considering the influence of the rock mass strength parameters of beneath rock mass layer. To examine stress distribution at different depths, failure patterns are also plotted.

关键词： bearing capacity     soil-rock interface     Hoek−Brown yield criterion     plasticity     limit analysis    

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Study on the cohesion and adhesion of hot-poured crack sealants

Meng GUO, Yiqiu TAN, Xuesong DU, Zhaofeng LV

《结构与土木工程前沿（英文）》 2017年 第11卷 第3期   页码 353-359 doi: 10.1007/s11709-017-0400-3

摘要： Filling crack sealant is a main method to repair cracking of pavement. The cohesion and adhesion of crack sealant directly determine its service performance and durability. However, the competitive mechanism of cohesion and adhesion failure modes is not clear currently. This research proposed two methods to evaluate cohesion and adhesion of crack sealant, and analyzed the influence of temperature on cohesion and adhesion. The effect of moisture on low-temperature performance of crack sealant was also be evaluated by conducting a soaking test. Results show that with the decrease of temperature, the cohesion force of crack sealant increases significantly, while the adhesion force changes little. There is a critical temperature at which the cohesion force equals the adhesion force. When the temperature is higher, the adhesion force will be greater than cohesion force, and the cohesion failure will happen more easily. In contrast, the adhesion failure will happen more easily when the temperature is lower than the critical value. Soaking in 25 °C water for 24–48 hours will slightly improve the low-temperature tension performance of crack sealant. However, soaking in 60 °C water for 24 hours will decrease the failure energy of low-temperature tension and damage the durability of crack sealant.

关键词： crack sealant     concrete pavement     cohesion     adhesion     moisture damage    

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CD176 single-chain variable antibody fragment inhibits the adhesion of cancer cells to endothelial cells

null

《医学前沿（英文）》 2016年 第10卷 第2期   页码 204-211 doi: 10.1007/s11684-016-0443-1

摘要：

CD176 (Thomsen-Friedenreich antigen) is a tumor-associated carbohydrate epitope (glycotope) functionally involved in blood spread and liver metastasis of cancer cells by mediating the adhesion of cancer cells to endothelial cells and hepatocytes, respectively. CD176 could be a promising target for antitumor immunotherapy. We applied B lymphocytes obtained from mice immunized with CD176 antigen and constructed a phage display library. A positive clone of CD176 single-chain variable antibody fragment (scFv) was successfully screened from this library. The CD176 scFv was expressed in Escherichia coli and purified. The purified scFv can bind to the natural CD176 expressed on the surface of cancer cells. Furthermore, the CD176 scFv inhibits the adhesion of CD176+ cancer cells to endothelial cells and hepatocytes. This CD176 scFv provides a basis for future development of recombinant CD176-specific antibodies that can be used in therapeutic application.

关键词： CD176     Thomsen-Friedenreich antigen     scFv     cancer     therapy     adhesion     metastasis    

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protein on PVDF ultrafiltration membrane fouling behavior under different pH conditions: interface adhesion

Xudong WANG,Miao ZHOU,Xiaorong MENG,Lei WANG,Danxi HUANG

《环境科学与工程前沿（英文）》 2016年 第10卷 第4期 doi: 10.1007/s11783-016-0855-9

摘要： pH values of the BSA solution significantly impact the process of membrane fouling. Dramatic flux decline is caused by membrane–BSA adhesion force at start of filtration. XDLVO theory shows the polar or Lewis acid–base interaction plays a major role in membrane fouling. To further determine the fouling behavior of bovine serum albumin (BSA) on different hydrophilic PVDF ultrafiltration (UF) membranes over a range of pH values, self-made atomic force microscopy (AFM) colloidal probes were used to detect the adhesion forces of membrane–BSA and BSA–BSA, respectively. Results showed that the membrane–BSA adhesion interaction was stronger than the BSA–BSA adhesion interaction, and the adhesion force between BSA–BSA-fouled PVDF/PVA membranes was similar to that between BSA–BSA-fouled PVDF/PVP membranes, which indicated that the fouling was mainly caused by the adhesion interaction between membrane and BSA. At the same pH condition, the PVDF/PVA membrane–BSA adhesion force was smaller than that of PVDF/PVP membrane–BSA, which illustrated that the more hydrophilic the membrane was, the better antifouling ability it had. The extended Derjaguin–Landau–Verwey–Overbeek (XDLVO) theory predicts that the polar or Lewis acid–base (AB) interaction played a dominant role in the interfacial free energy of membrane–BSA and BSA–BSA that can be affected by pH. For the same membrane, the pH values of a BSA solution can have a significant impact on the process of membrane fouling by changing the AB component of free energy.

关键词： PVDF membrane     Membrane fouling     Adhesion force     Protein     Interfacial free energy    

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Plated contacts for solar cells with superior adhesion strength to screen printed solar cells

R. CHEN,S. WANG,A. WENHAM,Z. SHI,T. YOUNG,J. JI,M. EDWARDS,A. SUGIANTO,L. MAI,S. WENHAM,C. CHONG

《能源前沿（英文）》 2017年 第11卷 第1期   页码 72-77 doi: 10.1007/s11708-016-0428-4

摘要： The improvement of adhesion strength and durability of plated contacts is required for cell manufacturers to gain confidence for large-scale manufacturing. To overcome weak adhesion at the metal/Si interface, new approaches were developed. These involve the formation of laser-ablated anchor points, or grooves in the extreme case of overlapping anchor points, in the heavily doped silicon surface. When plated, these features greatly strengthen the mechanical adhesion strength of the metal. A stylus-based adhesion tester was developed specifically for evaluating the effectiveness of plated contacts to smooth silicon surfaces. The use of such a tester was also extended in this work to textured and roughened surfaces to allow evaluation of different metal contacting approaches. The adhesion strengths for various metal contacting schemes were evaluated, including screen-printed silver contacts, nickel/copper (Ni/Cu) light-induced plated (LIP) contacts for laser-doped selective emitter (LDSE) cells, buried-contact solar cells (BCSCs), and Ni/Cu LIP contacts formed with laser-ablated anchoring points in selective emitter (LAASE) cells. The latter has superior adhesion strength. The standard “peel test” of the industry was compared to the stylus-based adhesion testing, with the latter shown value for testing metal contacts on smooth surfaces but with caution needed for use with textured or roughened surfaces.

关键词： light-induced plating     metal adhesion strength     copper plating     metal contacts     solar cell durability     silicon solar cells    

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Development and road performance of clear asphalt with high transparency and adhesion

《结构与土木工程前沿（英文）》 2023年 第17卷 第2期   页码 238-255 doi: 10.1007/s11709-022-0898-x

摘要： Clear asphalt (CA) currently used in light-colored asphalt mixtures (LCAM) exhibits poor transparency and adhesion. Therefore, a highly transparent CA (HCA) modified using a silane coupling agent (KH550) was prepared. Furthermore, LCAM was prepared by mixing CA and limestone aggregates. The properties of the HCA and ordinary CA (OCA) were characterized using conventional asphalt tests, optical tests, pull-off tests, ultraviolet aging tests, dynamic shear rheometry, Fourier-transform infrared spectroscopy, differential scanning calorimetry, and scanning electron microscopy. Whereas Marshall, moisture resistance, wheel tracking, trabecular bending, and British pendulum tests were employed for the LCAM. The transmittance and spectral reflectance of the HCA were 123.30 and 3.74 times greater than those of the OCA, respectively. The complex modulus and viscosity-aging index of the HCA were 48% and 53% less than those of the OCA, respectively. After modification with KH550, the Marshall stability ratio, tensile strength ratio, and flexural strain of the HCA-prepared LCAM increased by 12.92%, 25.06%, and 23.90%, respectively. However, the rutting resistance of the HCA-prepared LCAM was 14.3% less than that of the OCA-prepared LCAM. The comprehensive performances of the HCA and HCA-prepared LCAM were 49.2% and 10.3% greater than those of the OCA and OCA-prepared LCAM, respectively, indicating a high application value in the future.

关键词： light-colored asphalt pavement     orthogonal test     road performance     spectral reflectance     silane-coupling agent    

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大力测量技术的新进展——附着式超轻型大力传感器

沈久珩

《中国工程科学》 2001年 第3卷 第10期   页码 22-27

摘要：

大力传感器是现代重型装备的高科技电子信息器件。文章围绕重型大力传感器的微型化问题论述了重型装备大力测量的意义、特征及发展，讨论了大力分流测量的物理模型，介绍了作者发明的超轻型附着式大力传感器及其工程应用。

关键词： 重型装备     大力传感器     支承式     附着式     电阻应变计     分流测量    

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Cutting performance of surgical electrodes by constructing bionic microstriped structures

《机械工程前沿（英文）》 2023年 第18卷 第1期 doi: 10.1007/s11465-022-0728-9

摘要： Surgical electrodes rely on thermal effect of high-frequency current and are a widely used medical tool for cutting and coagulating biological tissue. However, tissue adhesion on the electrode surface and thermal injury to adjacent tissue are serious problems in surgery that can affect cutting performance. A bionic microstriped structure mimicking a banana leaf was constructed on the electrode via nanosecond laser surface texturing, followed by silanization treatment, to enhance lyophobicity. The effect of initial, simple grid-textured, and bionic electrodes with different wettabilities on tissue adhesion and thermal injury were investigated using horizontal and vertical cutting modes. Results showed that the bionic electrode with high lyophobicity can effectively reduce tissue adhesion mass and thermal injury depth/area compared with the initial electrode. The formation mechanism of adhered tissue was discussed in terms of morphological features, and the potential mechanism for antiadhesion and heat dissipation of the bionic electrode was revealed. Furthermore, we evaluated the influence of groove depth on tissue adhesion and thermal injury and then verified the antiadhesion stability of the bionic electrode. This study demonstrates a promising approach for improving the cutting performance of surgical electrodes.

关键词： surgical electrodes     tissue adhesion     thermal injury     bionic structures     cutting performance     medical tools    

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Learning from biological attachment devices: applications of bioinspired reversible adhesive methods in robotics

《机械工程前沿（英文）》 2022年 第17卷 第3期 doi: 10.1007/s11465-022-0699-x

摘要： Many organisms have attachment organs with excellent functions, such as adhesion, clinging, and grasping, as a result of biological evolution to adapt to complex living environments. From nanoscale to macroscale, each type of adhesive organ has its own underlying mechanisms. Many biological adhesive mechanisms have been studied and can be incorporated into robot designs. This paper presents a systematic review of reversible biological adhesive methods and the bioinspired attachment devices that can be used in robotics. The study discussed how biological adhesive methods, such as dry adhesion, wet adhesion, mechanical adhesion, and sub-ambient pressure adhesion, progress in research. The morphology of typical adhesive organs, as well as the corresponding attachment models, is highlighted. The current state of bioinspired attachment device design and fabrication is discussed. Then, the design principles of attachment devices are summarized in this article. The following section provides a systematic overview of climbing robots with bioinspired attachment devices. Finally, the current challenges and opportunities in bioinspired attachment research in robotics are discussed.

关键词： adhesion     bioinspired attachment     biomimetic gripper     climbing robot    

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Talin and kindlin: the one-two punch in integrin activation

null

《医学前沿（英文）》 2014年 第8卷 第1期   页码 6-16 doi: 10.1007/s11684-014-0317-3

摘要：

Proper cell-cell and cell-matrix contacts mediated by integrin adhesion receptors are important for development, immune response, hemostasis and wound healing. Integrins pass trans-membrane signals bidirectionally through their regulated affinities for extracellular ligands and intracellular signaling molecules. Such bidirectional signaling by integrins is enabled by the conformational changes that are often linked among extracellular, transmembrane and cytoplasmic domains. Here, we review how talin-integrin and kindlin-integrin interactions, in cooperation with talin-lipid and kindlin-lipid interactions, regulate integrin affinities and how the progress in these areas helps us understand integrin-related diseases.

关键词： signal transduction     transmembrane domain     nanodisc     integrin     talin     kindling     cell adhesion    

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不确定路面附着系数条件下一种基于双层非线性模型预测控制的自动驾驶卡车轨迹规划方法 Research Articles

王鸿超1,张伟伟1,吴训成1,曹昊天2,高巧明3,罗素云1

《信息与电子工程前沿（英文）》 2020年 第21卷 第7期   页码 963-1118 doi: 10.1631/FITEE.1900185

摘要： 提出一种双层控制算法以规划配备四轮轮毂电机的自动驾驶卡车的行驶轨迹。该控制算法主要由主层非线性模型预测控制（MLN-MPC）算法和次层非线性模型预测控制（SLN-MPC）算法组成，其中，MLN-MPC控制算法用于规划合理的卡车行驶轨迹，SLN-MPC控制算法将车轮纵向滑移率限制在稳定区域，避免卡车在驱动过程中发生过度打滑。总体而言，该控制算法为一个闭环控制系统。在离线仿真环境下，通过AMESim、Simulink、dSPACE和TruckSim仿真软件联合仿真。仿真结果表明，本文所提算法能规划一条合理的车辆避障行驶轨迹，在不确定路面附着系数条件下能将车辆纵向滑移率控制在合理范围。此外，为评估该算法在实际应用中的可行性，在联合仿真系统中加入驾驶员模型验证该算法的稳定性与鲁棒性。与传统的基于PID控制算法相比，该算法具有更低的计算能耗。

关键词： 自动驾驶卡车；轨迹规划；非线性模型预测控制；纵向滑移率    

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人流不全的临床特点分析及生育情况调查

罗岚蓉,李坚

《中国工程科学》 2015年 第17卷 第6期   页码 70-76

摘要：

目的：分析人流不全的临床特点，探讨其发生的高危因素，同时调查患者术后的生育及避孕情况。方法：对首都医科大学附属北京妇产医院2007年10月—2012年10月收治的55例人流不全病历进行回顾性病例分析以及电话随访了解其生育情况及避孕情况。结果：人流不全的主要临床表现为人流术后的异常阴道出血42例（42/55，76.4 %）以及月经异常13例（13/55，23.6 %），超声检查可以发现人流不全造成的宫腔内异常，但需要结合人绒毛膜促性腺激素（HCG）水平的测定以及术后的病理来诊断人流不全。B超下的清宫手术能有效地清除残留的妊娠组织，术后均未再发现宫腔残留。人流不全的高危因素中主要的客观因素为子宫过度屈曲，占23.6 %（13/55），主要的主观因素为宫颈扩张不够，占25.5 %（14/55）。二次清宫术后主要并发症为宫腔粘连，发生率为5.5 %（3/55）。55例患者术后共随访到29例患者，有17例再次妊娠，其中11例妊娠分娩，6例选择人工流产终止妊娠，未发现人流不全二次清宫对生育的明显不良影响。无生育要求的妇女均有意识采取避孕方法来避免意外妊娠。结论：人流不全的主要临床表现为手术后异常的阴道出血，通过结合尿或血的HCG检查以及B超检查，可以及时地发现人流不全。超声指导下清宫是治疗的有效办法。人流不全发生的高危因素，主要客观因素为子宫过度屈曲，主要主观因素为宫颈扩张不够。对于存在高危因素的手术采取超声指示下手术，能够有效地降低人流不全的发生率。人流不全二次清宫术后主要手术并发症为宫腔粘连，无手术并发症发生的患者，未发现明显生育能力的受损。但是对于避孕方法的选择，还需要更多的计划生育服务来帮助她们采取高效的避孕方法。

关键词： 人流不全     并发症     宫腔粘连     生育     避孕    

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Effect of electrokinetic property of charged polyether sulfone membrane on bovine serum albumin fouling behavior

Xiaorong Meng, Shanshan Huo, Lei Wang, Xudong Wang, Yongtao Lv, Weiting Tang, Rui Miao, Danxi Huang

《环境科学与工程前沿（英文）》 2017年 第11卷 第2期 doi: 10.1007/s11783-017-0907-9

摘要： Negatively charged CMPES and positively charged QAPES membranes were fabricated. Charge modification reduced the adhesion forces between PES UF membranes and BSA. QAPES-BSA / was weaker than that of CMPES-BSA at pH 3 and on the contrary at pH 9. Flux decline rate was positively correlated with the adhesion forces of membrane-BSA. Variation of adhesion was consistent with that of potential absolute values. Negatively charged carboxymethylated polyethersulfone (CMPES) and positively charged quaternized polyethersulfone (QAPES) ultrafiltration (UF) membranes were prepared by bulk chemical modification and non-solvent induced phase separation method. The effects of PES membrane interfacial electrokinetic property on the bovine serum albumin (BSA) membrane fouling behavior were studied with the aid of the membrane-modified colloidal atomic force microscopy (AFM) probe. Electrokinetic test results indicated that the streaming potential (D ) of QAPES membrane was not consistent with its expected value, however, within the pH range of 3–10, the potentials of two charged-modified PES membranes were more stable than the unmodified membrane. When pH value was 3, 4.7 or 9, the interaction behavior between charged PES membrane and BSA showed that there was significant linear correlation between the jump distance of membrane-BSA adhesion force ( ) and the potential absolute value. Charged modification significantly reduced the adhesion of PES membrane-BSA, and the adhesion data was good linear correlated with the flux decline rate in BSA filtration process, especially reflected in the CMPES membrane. The above experimental facts proved that the charged membrane interfacial electric double layer structure and its electrokinetic property had strong ties with the protein membrane fouling behavior.

关键词： Charged PES UF membrane     BSA     Electrokinetic characterization     Adhesion force     Jump distance    

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标题 作者 时间 类型 操作

On the applicability of different adhesion models in adhesive particulate flows

Guanqing LIU, Shuiqing LI, Qiang YAO,

期刊论文

Materials and surface engineering to control bacterial adhesion and biofilm formation: A review of recent

Huan GU, Dacheng REN

期刊论文

Effect of interface adhesion factor on the bearing capacity of strip footing placed on cohesive soil

期刊论文

Study on the cohesion and adhesion of hot-poured crack sealants

Meng GUO, Yiqiu TAN, Xuesong DU, Zhaofeng LV

期刊论文

CD176 single-chain variable antibody fragment inhibits the adhesion of cancer cells to endothelial cells

null

期刊论文

protein on PVDF ultrafiltration membrane fouling behavior under different pH conditions: interface adhesion

Xudong WANG,Miao ZHOU,Xiaorong MENG,Lei WANG,Danxi HUANG

期刊论文

Plated contacts for solar cells with superior adhesion strength to screen printed solar cells

R. CHEN,S. WANG,A. WENHAM,Z. SHI,T. YOUNG,J. JI,M. EDWARDS,A. SUGIANTO,L. MAI,S. WENHAM,C. CHONG

期刊论文

Development and road performance of clear asphalt with high transparency and adhesion

期刊论文

大力测量技术的新进展——附着式超轻型大力传感器

沈久珩

期刊论文

Cutting performance of surgical electrodes by constructing bionic microstriped structures

期刊论文

Learning from biological attachment devices: applications of bioinspired reversible adhesive methods in robotics

期刊论文

Talin and kindlin: the one-two punch in integrin activation

null

期刊论文

不确定路面附着系数条件下一种基于双层非线性模型预测控制的自动驾驶卡车轨迹规划方法

王鸿超1,张伟伟1,吴训成1,曹昊天2,高巧明3,罗素云1

期刊论文

人流不全的临床特点分析及生育情况调查

罗岚蓉,李坚

期刊论文

Effect of electrokinetic property of charged polyether sulfone membrane on bovine serum albumin fouling behavior

Xiaorong Meng, Shanshan Huo, Lei Wang, Xudong Wang, Yongtao Lv, Weiting Tang, Rui Miao, Danxi Huang

期刊论文