克拉玛依减渣热转化前后的溶解度参数研究

对克拉玛依减渣进行适度热转化，确定了其裂解深度最大且不结焦的条件。利用超临界萃取分馏技术，将克拉玛依减渣及其热转化残渣油分离成一系列窄馏分和萃余残渣，对窄馏分及萃余残渣的性质（相对分子质量、密度、残炭、C、H、N、S元素和金属元素等）进行了表征。用改进的方法测定了萃余残渣的溶解度参数，并根据性质计算了各个窄馏分的溶解度参数，克拉玛依减渣及其热转化残渣油萃余残渣的溶解度参数分别为18.27 MPa1/2和19.79 MPa1/2；从溶解度参数的角度解释了渣油加工过程中的分相、结焦等问题。     

Relativistic motion on Gaussian quantum steering for two-mode localized Gaussian states

Realistic quantum systems always exhibit gravitational and relativistic features. In this paper, we investigate the properties of Gaussian steering and its asymmetry by the localized two-mode Gaussian quantum states, instead of the traditional single-mode approximation method in the relativistic setting. We find that the one-side Gaussian quantum steering will monotonically decrease with increasing observers of acceleration. Meanwhile, our results also reveal the interesting behavior of the Gaussian steering asymmetry, which increases for a specific range of accelerated parameter and then gradually approaches to a finite value. Such finding is well consistent and explained by the well-known Unruh effect, which could significantly destroy the one-side Gaussian quantum steering. Finally, our results could also be applied to the dynamical studies of Gaussian steering between the Earth and satellites, since the effects of acceleration are equal to the effects of gravity according to the equivalence principle.