In VSPFM non-contact mode, the difficulty of short range of imaging force in AFM is overcome because of the combination of polarization force with van der Waals force. In VSPFM tapping mode, the tip-sample interaction is even smaller than the minimum force in AFM tapping mode stable imaging with the assistance of polarization force.
在VSPFM的非接触方式中，长程的极化力叠加在范德华力上，这就克服了AFM非接触方式中范德华力力程太短而成像不稳定的缺点；在极化力介导的轻敲方式中，可以用比AFM轻敲模式中最小稳定成像力更小的力进行成像。
Thus, based on the higher-order Cauchy-Born constitutive model and the generalized parametric constitutive law for van der Waals force developed here, a series of mechanical properties, compression buckling and adhesion behaviors for single-walled carbon nanotubes are studied respectively in the present thesis.
因此，基于所发展的高阶Cauchy-Born广义连续体本构模型以及范德华力广义参变本构模型，本文分别研究了单壁碳纳米管的一系列相关力学特性、压缩变形机理以及平行或交叉排列的碳纳米管间的黏附行为。
In the second part, one more alkoxy chain was added on each peripheral phenyl rings of pentaphenylynylbenzene. Such modification should lead to strengthened the Van der Waals force and hindered rotation of the peripheral phenyl rings to favor highly ordered columnar phases.
系列二与系列一最大的差别为在五炔苯基苯上外围五个环上各增加一条侧链，侧链的增多使凡得瓦力增大，链与链之间容易聚集且同时阻碍外围炔苯基旋转，使具高共轭特性的五炔苯基苯进行堆叠生成较有秩序性的筒型液晶相。
By further analyzing each energy item, it could be obtained that van der Waals'interaction energy was the main driving force for complex.
进一步分析各个能量项可得，范德华相互作用能为包结的主要驱动力。
With decreasing of flying height and roll angle, the van der Waals force decreased the loading capability and roll moment slightly.
范德华力对侧翻角的影响不敏感，随着侧翻角的增加，范德华力使滑块的承载能力和侧翻转矩略微减小。
And a FE model of bonding interface was developed to study the stressdistribution on bonding interface. The simulation results show that theperiphery of bonding interface is in a better condition for surface layerbreaking, debris removing and atom diffusion than other area, which is asignificant cause of ring-shaped bonding pattern formation.5 Some preliminary understanding about bonding mechanism wasobtained. With the bonding force and ultrasonic, the stress on bump/pad canreach several MPa, which causes dislocation proliferation, plastic flow ofbumps and pads and oxide film broken on bonding interface. During theplastic flow, the oxide film debris are expelled from bonding interface and theAu/Ag atoms are contacted directly, which results in initial bonding strengthby forming chemical bond and physics bond (adsorptioncaused by van der Waals force).
通过建立了键合界面的有限元模型，研究了键合过程中不同状态下键合界面的应力分布，发现接触面边缘的应力远大于其它位置，更有利于氧化膜去除、驱动原子扩散，并形成键合强度，这是产生环状键合界面的重要原因。5获得了键合机理的初步认识：在键合力和超声作用下，金凸点／焊盘中产生高达数百MPa的应力，使金凸点和焊盘中的位错大量增殖、产生塑性流变、接触界面的氧化膜破裂；金凸点／焊盘在塑性流动过程中，将氧化膜碎片带出接触面，使键合界面裸露的金和银原子直接接触，一方面通过电子云共享形成化学键，另一方面形成物理键，生成最初始的键合强度。
In this thesis, first the molecular structural mechanics and the principle of van der waals force modeling are introduced, then some simulation methods and programs are developed in the ANSYS using the second-development technology, where the chemical bond is modeled by beam element and the van der waals force is modeled by combination element.
然后，利用通用有限元软件ANSYS 二次开发技术开发了相应的程序模块，其中，原子间的化学键用梁单元模拟，分子间的范德华力用非线性弹簧单元模拟。
This is because solid film is of better ordering, stronger intermolecular van der Waals force, and lower surface free energy contributing to decrease friction coefficient, while the molecule of more compact packing in the solid film helps to carry load.
其原因在于，与液体膜相比，固体膜的有序化程度高，可有效地降低底材的表面自由能；另一方面，固体膜中分子排列致密，有助于承载能力的提高。
For example, by molecular beam experiment, two or three pairs of atoms or molecules to form the so-called van der Waals molecular studies reveal a lot about the nature of the molecular force.
例如通过分子束实验，对两三个原子或分子形成的所谓范德瓦尔斯分子的研究，揭示了许多有关分子力的性质。
However, the main component of adhesion forces, van der Waals force, electrostatic force and surface tension force are related to the ambient environmental relative humidity condition.
而粘附力的三种主要组成部分，范德华力、静电力和表面张力都受到环境参数特别是相对湿度的影响。
Quantum theory of van der Waals force and hydrogen bond
范德瓦耳斯力和氢键的量子理论
The groove binding was considered most likely to be the binding mode between them, in consistent with the thermodynamic results, which indicated that the hydrogen bonding and van der Waals force were the main acting force.
结合各项实验结果，沟槽结合被认为是二者之间最可能的结合模式，与氢键和范德华力是主要作用力这一热力学结果也相符。
All of the reactions were spontaneous thermodynamics reactions, and the major driving forces were hydrogen bond and van der Waals force.
其相互间作用力均为氢键和范德华力，其结合反应均为自发的热力学反应。
Some phenomena of polymer solution, which can not be satisfactorily explained by such basic chemical theory as van der Waals force and hydrogen bond, are well interpreted by introducing the structrue adapability tenets of cybernetics into the branch of polymer.
摘要将控制论的结构适应性原理引入高分子学科，解释了一些范德华力、氢键等化学基本理论未能恰当解释的聚合物溶解现象。
Protein is the basis of life, which is a kind of non-periodical polymer. The interactions inside and outside protein such as hydrogen bonding, van der Waals force, disulfide bonds, electrostatic and hydrophobic interactions are very important to maintain the native structure and physiological activity.
蛋白质是生命的物质基础，它是一种非周期性的聚合物，分子内通过静电、疏水相互作用以及氢键、范德华力、二硫键等维持天然结构，保持生理活性。
For conjugation, immunoglobulin is directly adsorbed on the particle surfaces, mediated mainly by London – van der Waals force and hydrophobic interaction.
对于结合，免疫球蛋白直接吸附在颗粒的表面上，主要通过London-范德华力和疏水相互作用。
The color-analog Van der Waals force between two hadrons is studied by use of the coupling channel resonating group method in the framework of the Gaussian-type quark confinement potential.
本文采用高斯增长的夸克禁闭势和耦合道共振群方法研究了强子之间的色vanderwaals力问题。
The results show that chemical reactions occur at interface of phenolic resins and steel, but chlorinated rubber is bonded to steel by means of Van der Waals force.
结果表明，胶粘剂中酚醛树脂在界面区域与钢之间存在化学结合，而氯化橡胶与钢之间以范德华力粘接。
The model of macromolecular internal rotation motion does not depend on temperature in solid → liq-uid transition. The internal rotation energy of segments and segment groups is the source of the polarization energy independent of temperature in the intermolecular Van der Waals force field.
提出固→液玻璃化转变中，大分子的内旋转运动模式与温度无关，链段和链段集团的内旋转能来源于大分子链间vanderwaals力场中的不依赖温度的极化能。
The experiment results indicate that the initial step of this photochemical reaction is an H abstraction from RH by excited SO_2 and that intermolecular actions of aerosols depend on van der waals force.
结果表明光化反应的第一步是H原子提取反应，光化学烟雾是依靠vanderwaals力将分子集合在一起的。