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Mechanism of Hollow Nanoparticle Formation Due to Shape Fluctuations
Hollow Nanoparticle Formation Shape Fluctuations
2015/10/16
Shape fluctuations in nanoparticles strongly influence their stability. Here, we introduce a quantitative model of such shape fluctuations and apply this model to the important case of Pt-shell/transi...
On solutions of Maxwell’s equations with dipole sources over a thin conducting film
solutions of Maxwell’s equations dipole sources conducting film
2015/10/16
We derive and interpret solutions of time-harmonic Maxwell’s equations with a vertical and a horizontal electric dipole near a planar, thin conducting film, e.g. Graphene sheet, lying between two unbo...
Physical vs. numerical dispersion in nonhydrostatic ocean modeling
Dispersion Nonhydrostatic effects Internal waves Ocean modeling Grid resolution requirements Leptic ratio Lepticity
2015/6/30
Many large-scale simulations of internal waves are computed with ocean models solving the primitive (hydrostatic) equations. Under certain circumstances, however, internal waves can represent a dynami...
文章涉及现代物理学一些前沿而基础性问题，主要是针对相对论而展开的物理理论探索。在质疑相对论的同时，在经典物理理论的基础上构建了新的物理理论体系，并用新理论对一些著名的且在科学发展史上具有重大影响的实验观测计行分析和计算，结果理论计算值与资料公布的实验观测值高度吻合，如新理论用光速可变观计算出的GPS卫星上的原子钟比地面上的原子钟每天快38.6微秒,与资料公布的实验值完全一致.新理论还对牛顿理论进行...
物理学想攻克宇宙但却紧贴着自己的家门挖了一道它无法逾越的鸿沟，它现在应当发现了自己已经掉进沟里；科学实验和数学证明永远只能认识部分宇宙，永远无法承担物理学的全部任务。全世界的物理学家和大师们还不知道理论物理学研究存在着第三种方法——它威力甚大，他轻松的创造了科学奇迹和思想奇迹完全是由于摆脱了数学证明之后“惹的祸”！
针对传统电容层析成像（ECT）流型辨识方法识别率较低的问题，提出一种基于压缩感知理论的ECT流型辨识方法。首先，将ECT系统获得的测量电容向量归一化，并表示为训练样本集的过完备字典稀疏线性组合；然后，将随机高斯矩阵作为测量矩阵对测试样本和标准样本分别进行采样，并利用压缩感知信号重构算法求解L0范数下的最优化问题，从而得到各样本在训练样本集上的稀疏表示；根据待测样本和标准样本稀疏解之间的线性相关程度...
基于时域有限差分法的手机辐射计算分析
手机辐射 时域有限差分法 比吸收率 碳纳米管
2014/1/9
采用时域有限差分法，构建了手机与人体相互作用的模型.在频率为1 800 MHz下计算了手机上涂敷碳纳米管复合物吸波材料前后对电磁辐射的比吸收率SAR，并由此得到天线辐射方向图.计算结果表明：手机上涂覆碳纳米管CNTs复合物吸波材料可以降低手机比吸收率值，对天线辐射方向图影响很小.
曲率张量,规范场的实质 :梯度的旋度场
Riemann-空间 规范场 绝对积分 旋度 曲率
2012/11/15
在黎曼空间、纤维丛空间(规范场)中,坚持使用遂点标架的基础上,普遍地引入绝对积分的概念(绝对微分逆运算),并对通常外微分d(dxi)≠0的意义和条件加以讨论,改写微分形为对称形式,使外微分和绝对微分联系起来.在此基础上,改进Stokes’公式,引入环量、旋度、散度(通常借助或类比欧氏空间的概念来,不精确,不能很好应用).证实:曲率它正是非欧氏空间不为零的梯度的旋度.并发现:Bianchi等式实质是...
MINIMUM LATENCY LINK SCHEDULING FOR ARBITRARY DIRECTED ACYCLIC NETWORKSUNDER PRECEDENCE AND SINR CONSTRAINTS
Minimum latency link scheduling SINR model physical interference model
2012/12/4
Scheduling wireless links under the SINR model has attracted increasing attention in the past few years [1–6, 8–15, 18–20, 23–25, 27, 28, 33–36, 39, 41, 42, 45, 46]. However, most of previous work did...
Ab initio calculation of ideal strength and phonon instability of graphene in tension
strength phonon instability graphene
2012/8/8
Graphene-based sp2-carbon nanostructures such as carbon nanotubes and nanofibers can fail
near their ideal strengths due to their exceedingly small dimensions. We have calculated the
phonon spectra ...
Multiscale Asymptotic Expansion and Finite Element Methods For the Mixed Boundary Value Problems of Second Order Elliptic Equation in Perforated Domains
Homogenization Multiscale asymptotic expansion Elliptic equationof second order with rapidly oscillating coefficients Perforated domain
2012/8/8
In this paper, we will discuss the mixed boundary value problems for
the second order elliptic equation with rapidly oscillating coefficients in perforated
domains, and will present the higher-order...
A steady state capturing and preserving method for computing hyperbolic systems with geometrical source terms having concentrations
Shallow water equations Nozzle flow equations Discontinuous topography well-balanced scheme surface gradient method Shock capturing
2012/8/8
A steady state capturing and preserving method for computing hyperbolic systems with geometrical source terms having concentrations 。
Construction of dKP and BKP Equations with Self-consistent Sources
Construction dKP BKP Equations Self-consistent Sources
2012/8/7
A new procedure is 痳stly proposed to construct soliton equations
with self-consistent sources(SESCSs) in bilinear forms, starting from the Gram-type
determinant solution or Gram-type pfa盿n solution ...
An Adaptive Finite Element Method for the H-Ψ Formulation of Time-Dependent Eddy Current Problems
Maxwell’s equations eddy current problem adaptive finite element method multiply
2012/8/7
In this paper, we develop an adaptive finite element method based on reliable
and efficient a posteriori error estimates for the H − formulation of eddy current problems with
multiply connec...
A Second Order Finite Difference-Spectral Method for Space Fractional Diffusion Equation
A Second Order Finite Difference-Spectral Method Space Fractional Diffusion Equation
2012/8/7
A high order finite difference-spectral method is derived for solving space fractional diffusion equations, by combining the second order finite difference method in time and the spectral Galerkin met...