他在《论平面图形的平衡》(On the Equilibrium of Planes)中用代数的方式加少量的图示解释到:“平衡条件下物体重量与距离成反比。” 01 然而,必须指出的是,古代工匠积累并具备的这些知识是以经验为基础的技术知识,而鲜有探究其中的科学原理。其原因可能是“在古代,存在着一种反对创造性的学习与体力劳动结合的强烈...
View further author informationdegroot@cua.eduJean De Groot
which make an angle α with the directions of the major and the minor principal stresses, can be expressed into the major and the minor principal stresses by means of the equations of equilibrium 重音在二架飞机上有他们的法线传染媒介在x方向和y方向,做一角度α以方向 少校和较小主应力,可以被表达...
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EPX solves the conservation of momentum (equilibrium) equations in the structural sub-domain and the conservation of mass, momentum and energy in the fluid sub-domain. The fluid is considered as compressible and inviscid (Euler equations). In the simulations presented in this paper, only the ...
This, however, is mainly due to the fact that in engine like applications NOx concentrations never reach their equilibrium value. Equilibrium values only differ by a maximum of 20%. 展开 关键词: ignition internal combustion engines modeling NO_x real gas ...
For equilibrium the "angle of response" α can be expressed as: μ = F p / F n = W sin(α) / (W cos(α)) = tan(α) (3) Example - Gradient Force acting on a Car, Work Done and Power Required The weight of an electric car is 2400 kg . The force acting on the car...
Based on the limit equilibrium stability analysis of RSF, the following expressions for ΔqT can be obtained for reinforced sand [the detailed derivation can be found in Sharma et al. (2009):(2)Stripfooting:ΔqT=∑i=1N4Ti[u+(i−1)h]B2(3)Squarefooting:ΔqT=∑i=1N12Ti[u+(i−1...
First, the equilibrium lattice constant of the fcc Fe structure was optimized. The obtained magnitude was a = 3.446 Å, and the corresponding experimental value was a = 3.648 Å [38]. The optimized lattice constant was subsequently used to establish suitable grain boundary models followed by ...
The local stability and bifurcation analysis of the equilibrium points is provided. The global stability of the co-existing equilibrium is analyzed in Section 2.4. Another mathematical model considering the prey refuge and the intra-specific competition among prey is formed. The existence of Hopf ...