Lorentz promoted the Loredtz transformation in a form of hypothesis while Einstein deduced it from the necessitarianism of restricted theory of relativity.
!--Security is strengthened by employing a PBKDF2 key derivation function.However, the weak passphrases users typically employ are vulnerable to password cracking attack.
This paper presents a stochastic calculus approach to this problem, deduces formulae to calculate the preestimate time, gives some thoughts of concrete realization.
Using the guantum mechanics method to describe the electronically nonadiabatic transition, the equation of the motion of the nonadiabatic transition probability amplitutes have been derived.
In the CGSM, shear modulus and damping ratio of the soil are functions of depth and shear strain, wave equation for the transmission of shear wave is obtained.
The formula of the curve tangent slope at some peculiar point in the orthograph on the stereoscopic surface intersecting line and the method of making tangent are given as well.