Rocket velocity is calculated using the equation V = Kt * ln(Mo/Mf) + Vi, where V is the final velocity, Kt is the specific impulse, Mo is the initial mass of the rocket, Mf is the final mass of the rocket, and Vi is the initial velocity. The natural logarithm (ln)...
NASA Glenn and Aerojet are developing a high fidelity high voltage Hall accelerator that can achieve specific impulse magnitudes greater than 2,700 seconds and xenon throughput capability in excess of 300 kilograms. Performance, plume ... H Kamhawi,T Haag,W Huang,... - Aiaa/asme/sae/asee Joi...
Mass, impulse and energy are preserved. Owing to their integral form, the equations can be used for discontinuous problems as well as for unstructured grids. Figure 5.4 shows a comparison of the three methods. Sign in to download full-size image 5.4. Comparison between finite differences, ...
Impulsevan der Pol equationperiodic motiondiscontinuousmapping dynamicsIn this paper, we investigate the dynamics of the periodic motion for switched van der Pol equation with impulsive effect, utilizing the theory of mapping dynamics in switching systems. For the optimized problem, we consider such ...
The conservation of momentum equation is derived and the stagnation pressure and impulse function are introduced. The equations of motion thus developed are put into standard logarithmic differential form, which, with a corresponding table of influence coefficients, permits ready application to specific ...
A line can be expressed as a system of equations consisting of the equations for two plane. 4.(1)众所周知,笛卡尔用一个数对来定位平面上的一个点,用一个数的三元数 组来定位空间的一个点。当这个思想被推广为 n 元实数组 u(a1,a2,……an), 对于任何整数 N>=1,这个 n 元数组称为一个 n ...
Therefore, we can reconstruct the time-resolved impulse response or Green's function for the diffuse specific intensity accord- ing to Iðr, ^s, tÞ~ 1 ð? Iðr, ^s, vÞeivtdv: 2p {? ð20Þ The frequency dependent coefficients from system (10) satisfy the condition Ilm...
We show that different normalization rules can have material consequences for statistical inferences of impulse responses. The correct normalization for recursive models turns out to be, in general, inappropriate for nonrecursive models. We show that inadequate normalization rules may confound various ...
In Fig. 20.4(d), results for multispectral anisotropic diffusion are shown for the mean curvature approach of [40] used in combination with the modified gradient approach of [11]. The edge map in Fig. 20.4(e) shows improved resilience to impulse noise over the vector distance dissimilarity ...
If P is a constant forall k∈ (–∞,∞), then the pulse becomes an ideal impulse or delta function. On the other hand, if P only exist for k = k0 say, then the wavefield can be taken to be continuous - a Continuous Wave or CW field. Suppose that at some position along x, ...