Elastic Wave Scattering from a Rough Strip-Like Crack

Ultrasonic nondestructive testing is a widely used method for searching for defects, e.g. cracks, in the nuclear power industry. Even though the method can be considered as wellestablished the theoretical understanding is far from complete, especially when more complicated situations are considered. Consequently, it is advantageous to have access to a good mathematical model of the testing procedure. Such a model can, for instance, be used to perform parametric studies, to develop testing procedures, for qualification purposes, and for education. Furthermore, systematic use of a well tested and validated simulation program will most likely result in a better physical understanding of the process. It should also be emphasized that experimental work is a very expensive alternative to mathematical modeling

Method of HDR image acquirement based on space light modulator

A new acquirement method is offered, in which a space light modulator is used to acquire images with different exposure, and then a HDR image is made with these images. The principle of this method is discussed, and experiment system including LCOS and CMOS is built up to acquire a series of images with different exposure. HDR image is composed with synthesize arithmetic. The system is cheap and easy to extend.link_to_subscribed_fulltex

A new process for processing take heavy crude

At Sinopec Luoyang Co, Tahe crude is processed by direct visbreaking process upon its refinery unit composition and crude oil properties. The process flow, product slates, and product specifications are discussed. By this process, not only the light oil is produced but the on-specification fuel oil as well.link_to_subscribed_fulltex