Rolling centrifuge repulsion Force Spacecraft

A Rolling Centrifugal Repulsion force UFO Introduction: Any object that rolls along a straight line will generate a centrifugal repulsive force that is away from the body being rolled, it is rolling centrifugal repulsive force. Utilizing this phenomenon, rolling the round ring along the edge of the UFO's disk will produce a constant lift, and then use the electric wheel technology to set the ballast rock at the bottom of the UFO to change the position of the ballast stone at the bottom of the chamber. In order to change the position of the center of gravity of the UFO, the purpose of driving the UFO can be achieved.

Electrostatic Attraction and Repulsion Explained and Modelled Mathematically Using Classical Physics—A Detailed Mechanism Based on Particle Wave Functions

The phenomenon of electrical attraction and repulsion between charged particles is well known, and described mathematically by Coulomb’s Law, yet until now there has been no explanation for why this occurs. There has been no mechanistic explanation that reveals what causes the charged particles to accelerate, either towards or away from each other. This paper gives a detailed explanation of the phenomena of electrical attraction and repulsion based on my previous work that determined the exact wave-function solutions for both the Electron and the Positron. It is revealed that the effects are caused by wave interactions between the wave functions that result in Electromagnetic reflections of parts of the particle’s wave functions, causing a change in their momenta.

Multilevel B-Spline Repulsive Energy in Nanomodeling of Graphenes

Quantum energies which are used in applications are usually composed of repulsive and attractive terms. The objective of this study is to use an accurate and efficient fitting of the repulsive energy instead of using standard parametrizations. The investigation is based on Density Functional Theory and Tight Binding simulations. Our objective is not only to capture the values of the repulsive terms but also to efficiently reproduce the elastic properties and the forces. The elasticity values determine the rigidity of a material when some traction or load is applied on it. The pair-potential is based on an exponential term corrected by B-spline terms. In order to accelerate the computations, one uses a hierarchical optimization for the B-splines on different levels. Carbon graphenes constitute the configurations used in the simulations. We report on some results to show the efficiency of the B-splines on different levels.

Erratum to “Multilevel B-Spline Repulsive Energy in Nanomodeling of Graphenes” [Journal of Surface Engineered Materials and Advanced Technology Vol. 4 No. 2 (April 2014) 75-86]

Quantum energies which are used in applications are usually composed of repulsive and attractive terms. The objective of this study is to use an accurate and efficient fitting of the repulsive energy instead of using standard parametrizations. The investigation is based on Density Functional Theory and Tight Binding simulations. Our objective is not only to capture the values of the repulsive terms but also to efficiently reproduce the elastic properties and the forces. The elasticity values determine the rigidity of a material when some traction or load is applied on it. The pair-potential is based on an exponential term corrected by B-spline terms. In order to accelerate the computations, one uses a hierarchical optimization for the B-splines on different levels. Carbon graphenes constitute the configurations used in the simulations. We report on some results to show the efficiency of the B-splines on different levels.

基于多目标灰狼优化算法与RBF神经网络的真空灭弧室触头结构优化设计

在真空灭弧室触头开断过程中,合适的磁场分布有利于提高其开断性能;在合闸过程中,动、静触头间存在的电动斥力会导致触头出现弹跳现象。针对以上问题,首先建立了带铁芯式杯状纵磁触头的三维模型,进行了磁场分布与电动力的计算;为了进一步提高触头的性能,然后构建了以触头片开槽长度、开槽宽度、径向偏转角度、杯座斜槽高度及单个斜槽上下旋转角度为输入,电流峰值时刻触头间隙中心平面纵向磁场强度最大值、过零时刻中心点处磁滞时间、合闸时动静触头间的电动斥力分别为输出的RBF神经网络模型;最后结合RBF神经网络模型与多目标灰狼优化算法(MOGWO)对触头结构进行了优化。结果表明:与初始结构参数相比,当触头片开槽长度为19.74mm、宽度为3.94mm、径向偏转角为19.9°、杯座斜槽高度为18.0mm、斜槽上下旋转角为119.2°时,触头具有更好的磁场分布特性,且动、静触头间的电动斥力明显减小,有利于提高触头的工作性能。

基于钢锥冲击的煤层卸压方法研究

针对煤矿冲击地压引起的采掘安全问题,以山西晋中左权五里堠煤矿3号煤层开采地质条件为工程背景,提出一种基于钢锥冲击煤层的卸压方法。根据通电线圈间产生电磁互感斥力原理,获得磁力驱动绕线钢锥撞击煤层的冲击力函数式,并结合弹性力学理论,分析冲击力作用下煤体应力场分布特征、裂隙类型、破裂范围及程度。结果表明:(1)冲击力与交流电电压及线圈级数呈正相关关系,与交流电频率及每米线圈匝数呈负相关关系。其中,电压是调控冲击力的最主要因素,综合考虑认为电压取660 V为宜。(2)计算显示钢锥长度与直径仅需1 cm和1.28 cm,与之匹配的2级加速线圈总长为2 cm,可实现冲击装置的微型化,便于在钻孔内灵活布置。(3)冲击力使钻孔横截面围岩出现集中系数为4.0~16.7的叶状极高应力区,其延伸长度为5倍钻孔半径,区内发育张拉裂隙;叶状区之外为集中系数1.7~3.3的高应力区,发育压剪裂隙,其范围可达50倍钻孔半径,据此得到卸压钻孔间距为2.5 m。(4)按卸压段长度,每孔内设置2个间距2 m的冲击装置,冲击力使钻孔纵截面围岩呈现针状极高应力区,相邻针状区间分布椭圆形压剪裂隙区,两者一起贯通2 m厚煤层,实现有效破煤卸压。研究成果为探索基于磁力钢锥冲击的煤层卸压技术奠定初步理论基础。

基于改进人工势场法的内河应急抢险船舶路径规划

针对应急抢险船舶在极端洪涝灾害时的路径规划问题,提出一种改进人工势场法的路径规划算法,实现内河应急抢险船舶的快速精准救援。由于传统人工势场法中存在局部极小点、目标不可达等影响应急抢险船舶救援的安全问题,通过改进斥力势场函数解决了船舶在靠近障碍物的救援点时的目标不可达问题;引入逃逸力避免了局部极小点问题。通过数值仿真试验对比验证,改进后的人工势场法能够帮助应急抢险船舶在复杂的内河航道环境中安全到达救援点。

辨析基础有机化学教材中的争议问题:乙烷构象稳定性的来源

烷烃的构象及其稳定性是基础有机化学中重要的知识点,其中乙烷的交叉式与重叠式构象是其中最基础的部分。现行的国内外本科基础有机化学教材中关于乙烷的交叉式构象比重叠式构象稳定的原因给出了不同的解释,比较混乱,不易于本科教学。本文调研了文献,梳理出乙烷交叉式构象稳定性来源的不同论点和论据,并指出先前文献分析与计算方法的不足。通过文献调研,我们认为超共轭效应和空间位阻效应两种因素都需要写入教材中。

Experimental investigation of the effects of oil asphaltene content on CO_(2) foam stability in the presence of nanoparticles and sodium dodecyl sulfate

Foam stability tests were performed using sodium dodecyl sulfate(SDS)surfactant and SiO2 nanoparticles as foaming system at different asphaltene concentrations,and the half-life of CO_(2) foam was measured.The mechanism of foam stability reduction in the presence of asphaltene was analyzed by scanning electron microscope(SEM),UV adsorption spectrophotometric concentration measurement and Zeta potential measurement.When the mass ratio of synthetic oil to foam-formation suspension was 1:9 and the asphaltene mass fraction increased from 0 to 15%,the half-life of SDS-stabilized foams decreased from 751 s to 239 s,and the half-life of SDS/silica-stabilized foams decreased from 912 s to 298 s.When the mass ratio of synthetic oil to foam-formation suspension was 2:8 and the asphaltene mass fraction increased from 0 to 15%,the half-life of SDS-stabilized foams decreased from 526 s to 171 s,and the half-life of SDS/silica-stabilized foams decreased from 660 s to 205 s.In addition,due to asphaltene-SDS/silica interaction in the aqueous phase,the absolute value of Zeta potential decreases,and the surface charges of particles reduce,leading to the reduction of repulsive forces between two interfaces of thin liquid film,which in turn,damages the foam stability.

Repulsive Casimir Force in a Cavity Comprising a Dielectric with Output Coupling

The Casimir force between a perfectly conducting wall and a dielectric wall in a cavity comprising a transparent dielectric with output coupling is investigated. By using furl quantum theory, we obtain the analysis expression of the force, which shows that the interaction of the two walls in this system is always repulsive. And the value of the Casimir force varies with the field amplitude reflectivity and the cavity size.

The Substructure of Elementary Particles Demonstrated by the I-Theory

Present studies in physics assume that elementary particles are the building blocks of all matter, and that they are zero-dimensional objects which do not occupy space. The new I-Theory predicts that elementary particles do indeed have a substructure, three dimensions, and occupy space, being composed of fundamental particles called I-particles. In this article we identify the substructural pattern of elementary particles and define the quanta of energy that form each elementary particle. We demonstrate that the substructure comprises two classes of quanta which we call “attraction quanta” and “repulsion quanta”. We create a model that defines the rest-mass energy of each elementary particle and can predict new particles. Lastly, in order to incorporate this knowledge into the contemporary models of science, a revised periodic table is proposed.

原油沥青质含量对纳米颗粒-十二烷基硫酸钠发泡二氧化碳泡沫稳定性的影响

采用十二烷基硫酸钠(SDS)表面活性剂和SiO_(2)纳米颗粒作为发泡体系,在不同原油沥青质含量下进行泡沫稳定性实验,测量CO_(2)泡沫半衰期;采用扫描电子显微图像、紫外分光光度法测试和Zeta电位测量,分析沥青质降低CO_(2)泡沫稳定性的机理。研究表明:当合成油与发泡体系质量比为1∶9时,合成油沥青质质量分数从0增至15%,SDS稳定泡沫半衰期从751 s减少至239 s,SDS-SiO_(2)稳定泡沫半衰期从912 s缩短至298 s;当合成油与发泡体系质量比为2∶8时,随着沥青质质量分数增大,SDS稳定泡沫半衰期从526 s缩短至171 s,SDS-SiO_(2)稳定泡沫半衰期从660 s缩短至205 s。由于沥青质与SDS和SiO_(2)纳米颗粒在水相中的相互作用,Zeta电位绝对值减小,颗粒表面电荷降低,导致薄液膜两侧界面之间的排斥力减小,从而破坏泡沫稳定性。

先验性虚拟排斥力约束下带电作业机械臂轨迹控制

由于带电作业中的机械臂需避开电力设备和障碍物,使得后验性约束条件的稳定性较差,进而导致控制曲线误差较大。对此,提出虚拟排斥力约束下的带电作业机械臂运动控制方法。对带电机作业机械臂关节的功能和势能进行计算。使用人工势场法进行障碍物检测,并结合机械臂关节的功能和势能计算具有先验性属性的虚拟排斥力。基于虚拟排斥力对机械臂与障碍物之间距离设置相应的约束。基于设置的约束条件,采用CPG神经网络构建机械臂的运动控制模型。实验结果表明,所提方法的机械臂运动控制位置与目标位置几乎一致,完美贴合目标曲线,并且具有快速的响应能力。

The physical origin of observed repulsive forces between general dislocations and twin boundaries in FCC metals:An atom-continuum coupling study

The combination of ultrahigh strength and excellent ductility of nanotwinned materials is rooted in the interaction between dislocations and twin boundaries(TBs).Quantifying the interaction between TBs and dislocations not only offers fresh perspectives of designing materials with high strength and ductility,but also becomes the cornerstone of multiscale modeling of materials with TBs.In this work,an atomcontinuum coupling model was adopted to quantitatively investigate the interaction between dislocations and TBs.The simulation shows that the dislocation-TB interaction is much weaker than the interaction between dislocations at the same distance.Simulation of the early stage of dislocation pileups further verifies that the experimentally observed repulsive forces are essentially from the dislocations or kink-like steps on TBs.The interaction between TBs and dislocations with different Burgers vectors was demonstrated referring to the elastic theory of dislocations.With the intrinsic interaction between dislocations and TBs being clarified,this work will promote further development of the multiscale simulation methods,such as discrete dislocation dynamics or phase-field method,of materials with TBs by providing a quantitative description of the interactions between TBs and dislocations.

一种改进的SA-APF路径规划算法

针对基于模拟退火的人工势场算法存在局部最小值问题,引入一种随机逃逸力,提出一种改进的SA-APF(Simulated Annealing-Artificial Potential Field)算法,可使机器人快速逃离局部最优解。针对算法中仍存在目标不可达问题,根据模糊控制方法提出一种自适应斥力势场增益系数,在机器人遇到目标点附近有对称排列的障碍物时,使机器人能够到达目标点,并采用4次贝赛尔曲线拟合,使路径更光滑。仿真结果表明,在简单和复杂的障碍物的实验条件下,改进后的算法可以准确、高效地完成路径规划。

低压塑壳断路器中电动斥力的三维有限元非线性分析与实验研究

电动斥力的计算对低压塑壳断路器(MCCB)的设计有重要意义。基于电流一磁场一电动斥力之间的方程,并考虑铁磁物质的影响,应用三维有限元非线性分析,引入圆柱导电桥模型作为接触点模拟触头问的电流收缩,统一计算触头间的Holm力和动导电杆上的Lorentz力。耦合电路方程,并以动触头上的预压力为约束通过迭代运算,从而确定动触头的打开时间。分析了五种不同结构的MCCB,并对电动斥力和触头打开时间进行了实验研究,结果表明,该方法是有效的,可用于MCCB新产品触头系统的设计。

考虑触头间电流收缩影响的低压塑壳断路器中电动斥力分析

基于电流-磁场-电动斥力之间的方程,并考虑铁磁物质的影响,应用三维有限元非线性分析,对比分析分别用Holm公式和引入圆柱导电桥模型考虑由于触头间电流收缩产生的Holm力计算方法。结果发现,虽然两种方法计算出的电流和磁场分布完全不同,但是当电流在10kA以下时力的计算结果误差不超过10%。并用拉压传感器对电动斥力进行了实验测量表明计算方法和结果是正确的。

触头间电动斥力的三维有限元分析

触头间电动斥力的大小对于开关电器的设计是很重要的。基于电流-磁场-电动斥力之间关系的方程,应用三维有限元分析,引入圆柱导电桥模型作为接触点模拟触头间的电流收缩,从而计算出作用在触头上的电动斥力。结果表明,电动斥力与导电斑点情况和触头形状有很大关系,同时,利用这种方法计算电动斥力是有效的。

聚羧酸系减水剂在石膏颗粒表面的吸附特性及其吸附-分散机理

采用紫外吸收光谱分析、微电泳仪、光电子能谱分析技术研究聚羧酸系减水剂(Polycarboxylate-type super-plasticizer,PCS)在石膏表面的吸附特性、表面电化学性能及其对石膏浆体流动度经时性的影响。结果表明,石膏表面钙元素2p电子结合能发生了明显的化学位移,PCS在石膏颗粒表面为化学吸附,其吸附等温线基本符合Lang-muir等温方程,吸附热20.85 kJ/mol,吸附层厚度7.5 nm;聚羧酸为梳状吸附,吸附量较小,静电斥力效应较弱,其分散作用主要来自于吸附层空间位阻效应。空间位阻效应产生的分散性受石膏水化作用的影响较小,因而具有良好的分散稳定性。

低压断路器操作机构的动态仿真与优化设计

采用基于多体动力学原理的虚拟样机技术,建立了低压塑壳断路器操作机构的动力学模型,并通过试验测试了该型号断路器的机械性能,结果表明所建仿真模型的输出特性与试验结果吻合得较好,证明了模型的正确性。该模型的建立对于研究低压断路器的开断特性具有重要意义,也为进一步的优化设计提供了良好的平台。计及短路情况下电动斥力的影响,分断过程所需时间缩短了约 2ms设计研究的结果表明:上连杆的质心的 y 坐标和质量对动触头角速度影响最大,跳扣的质心位置和质量影响也较大优化后动触头平均角速度提高了 13.3%。