11. The measurements were correlated with the Tait-type equation for density and the Hard-sphere scheme for viscosity. 利用得到的实验数据,分别拟合了碳酸二乙酯黏度和密度方程。 12. Introducing mass density allows the equation to be simp... ...
2010. Towards a general equation for frequency domain reflectom- eters. J. Hydrol. 383(3-4):319-329. doi:10.1016/j.jhydrol.2009.12.046Rudiger C, Western A, Walker J, Smith A, Kalma J, Willgoose G. Towards a general equation for frequency domain reflectometers. J Hydrol 2010;383:319...
The compatibility condition for these equations is that the relevant determinant should vanish. This condition gives the so-called Fresnel's equation that defines the frequency dependence of the wave vector (or dispersion relation). By introducing vector n=c/ωk along the direction of propagation an...
2. The frequency of free vibration of a body depends on density, shape and elasticity of its material. 2. The frequency of forced vibration becomes equal to that of the applied periodic force. 3. The total energy of the vibrating body remains conserved. 3. The rate of loss of energy due...
Under this assumption, it is possible to conclude that the electromagnetic field quantities in Maxwell's equations are harmonically oscillating functions with a single frequency. Another simplification deals with the fact that for the great majority of induction-hardening applications the velocity of ...
9 简正频率密度(density of normal frequency) (电声词典)在频率范围∆f内的简正频率数,它等于∆N/∆f=4πVf2/c2+πSf/2c2+L/8c。式中V=LxLyLz是房间的容积;S=2(LxLy+LyLz+LzLx)是房间内表面积的总和;L=4(Lx+Ly+Lz);c是空气中的声速;Lx、Ly、Lz分别是矩形房间的边长。
A one-dimensional wave packet closely centred around frequency ω scatters off a dielectric (grey rectangle), whose position is the parameter of interest. The left/right panel shows the energy density envelope (red)/the FI density (blue). The information is created at the sources located at ...
If the reaction is first order it has the units s−1, and for that reason it is often called thefrequency factororattempt frequencyof the reaction. Most simply,kis the number of collisions that result in a reaction per second,Ais the total number of collisions (leading to a reaction or...
Typically, two values of ε(ω) are given for each semiconductor. The low-frequency value ε0 represents the value of the dielectric function for frequencies below the optical phonon frequency. For such low frequencies both the atomic vibrational modes and the valence electrons in the semiconductor...
The density of allowed modes is computed essentially the same way for both problems. Later, several standard one-electron problems will be examined. However, let us first develop the concept of quantum mechanical current density and apply it to problems involving constant potentials for which plane...