Hybrid multilevel/multigrid potential preconditioner for fast finite element modeling

A robust hybrid multilevel/multigrid potential preconditioner is introduced for the fast and robust finite-element modeling of electromagnetic structures. The proposed preconditioning process combines the advantages of the hierarchical multilevel preconditioner and the nested multigrid potential preconditioner into a novel preconditioner with superior computational versatility. Numerical experiments from the application of the new preconditioner to the finite-element analysis of microwave devices demonstrate its superior numerical convergence and efficient memory usage.     

高效率窄线宽光纤激光器

本文报道了一种环形腔掺饵光纤激光器，得到了泵浦效率高达22.6%，输出线宽小于0.1nm的激光输出。     

Morphological compression of grayscale images of text

A new method for compression of grayscale images containing a small number of graphical elements is proposed. The method is characterized by high compression ratios, small losses, and good readability of the processed images. It is based on morphological methods of image analysis and could be used to store images of documents produced by fax machines, scanners, etc. Igor I. Falomkin. Born 1979. Graduated from the Faculty of Physics, Moscow State University, in 2001. Scientific interests: image analysis and recognition, analysis and interpretation of experimental data.     

Thermal expansion of gray tin

Translated from Izmeritel'naya Tekhnika, No. 7, pp. 40–41, July, 1989.     

再论“用离心机作静力结构模型试验”

 本文通过最近所作的两个离心模型试验,进一步探讨了用离心机作静力结构模型试验的有关问题,试验结果进一步证明用离心机作静力结构模型试验,无论在理论上和试验技术上都是可行的,最后将有关问题作了进一步的讨论。     

臭氧在食品加工用水处理工程上的应用

本文叙述了臭氧的一些特性 ,并以烟台某食品加工公司食品加工用水处理工程为例 ,介绍了臭氧的产生及应用情况 ,提供了处理前后水中各项指标的对照