Then, with a unitary-reduction process , he constructs a probabilistic quantum cloning machine and demonstrates that a ll the linearly independent quantum state can be cloned by this machine in a pro babilistic fashion.

We construct a probabilistic quantum cloning machine by a unitary-reduction process and show that all the linearly independent quantum states can be cloned by this machine in a probabilistic fashion.

That is ,a quark star is a black hole,while the black hole formation has not collapsed to one point yet.

Through almost 30 years observation and study, astronomers come to a relatively clear agreement that low mass stars form by collapse, accretion and outflow.

In this paper, we study the effects ofκ0in the equation of state on the core collapse ,shock propagation ,explosion energy and temperature of iron core at t 4, using the data of presupernova given by Woosley in 2002.

The drying shrinkage dynamics and drying shrinkage process of high C3S cement mortar were studied according to its drying shrinkage curves tested at two drying condition of RH 50% and RH 40% at 20 ℃.

The experimental results show that the polytropic index of compression process of dual fuel engine decreases linearly while the ignition delay increases with the increase of the methanol mass fraction.

Based on the examination to the practical compression process in a vapor compression refrigeration,air-conditioning,or heat pump system,the widely adopted simple adiabatic compression model in the theoretical refrigeration cycle was adapted to a combined process consisting of three sub- processes,i.