Since the electric motor of pure electric vehicle replaced the engine, the "masking effect" disappears, and the problem of vibration and noise of the transmission becomes prominent. This is generated during the gear meshing and is transmitted to the housing through the shaft and bearing. Thereby, radiation noise of the housing are generated. The prediction and analysis...

Ever since its first observation, the microscopic origin of ultrafast magnetization dynamics has been actively debated. Even more questions arise when considering composite materials featuring a combination intrinsic and proximity-induced magnetic moments. Currently, it is unknown whether specific different sublattices in popular ferromagnets consisting 3d (Co, Fe) 4d, 5d (Pd, Pt) transition me...

marx as one of great philosophers of history believes that state is the temporal that is created of classes which finally don,t need to the presence and human historic period begins during decline of capitalism.this article only proceed the end of state after collapse of capitalism and discuss it in two parts one is proletarian dictatorship and after this course.we have shown that in two stages...