A theoretical research on the variation of the absorption and dispersion profiles and population distribution of each level in a ladder-four-level system driven
科技报道在新闻报道中占有重要的地位。但是,怎样搞好科技报道?欲答好这个问题,却是不简单的,希望大家来共同探讨。这里,作者根据多年的采编实践,就如何逐步认识和掌握科技报
By using the time-dependent multilevel approach, the coherent population transfer among the quantum states of potassium atom driven by partially overlapped puls
By introducing a new tortoise coordinate transformation, we investigate the quantum thermal and non-thermal radiations of a non-stationary Kerr-Newman-de Sitter
This paper further investigates the synchronization problem of a new chaotic system with known or unknown system parameters. Based on the Lyapunov stability the
传记中的移情问题就是传记家与传主的关系问题.精神分析介入传记写作后,"移情"、"反向移情"和美学领域里所使用的"移情"所产生的交叉与融合,将这一问题推向深入.当代学者对此的探讨与争论,以及来自心理学、历史学、哲学等领域的思想成果,初步表明:传记中的移情现象是无法也无需避免的;但另一方面,移情并不损害传记的真实性,而是对传记的真实性的一种更为复杂的理解,是对传记家与传主之间复杂关系的一种更为辩证的描述.
1986年10月24日,我国第一个新闻出版纪念馆在延安清凉山开馆。记者随当年一批清凉山的老新闻出版工作者沿着山坡拾级而上,展览大厅就展现在面前。红色的馆牌上是陆定一书写
修辞学大师陈望道《修辞学发凡》一书中,以“大体依据组织,间或依据作用”的分类原则,将反复、对偶、排比、层递、错综、顶针、倒装、跳脱等八种辞格,归类在一个大的辞格群
In this paper, a large sample of extragalactic radio sources is analysed to show their statistical properties. The core and total radio powers are used to deter
A method of moments for calculating the dynamic response of periodically driven overdamped nonlinear stochastic systems in the general response sense is propose