中国赏石文化之变迁——从“观念石”文化说起

距今两三百万年前石器时代的人类，以石器为主要的劳动、生活工具，以掷小石块追逐飞禽，以砸大石块猎杀走兽，以打磨过的石斧、石刀等，进行刀耕火种式的原始农业耕作。

Propagation of Surface Wave Along a Thin Plasma Column and Its Radiation Pattern

Propagation of the surface waves along a two-dimensional plasma column and the far-field radiation patterns are studied in thin column approximation. Wave phase and attenuation coefficients are calculated for various plasma parameters. The radiation patterns are shown. Results show that the radiation patterns are controllable by flexibly changing the plasma length and other parameters in comparison to the metal monopole antenna. It is meaningful and instructional for the optimization of the plasma antenna design.

射频激励等离子体非线性效应的FDTD数值模拟

在考虑热运动、电子复合、扩散等效应后,建立电磁波与等离子体相互作用模型,验证了射频激励等离子体时产生的二次、多次谐波以及各个不同频段信号的调制现象,得到了不同激励功率、产生电子的电场阈值、电子能量等参数对电磁波频谱的影响,这对于射频激励等离子体的电路匹配、耦合器件以及等离子体天线传输、电磁兼容等设计很有帮助.