distance scale
1.The application of awl-shaped sensor head in the heat change water pipe experiment indicates that the ultrasonic guided waves may transmit nearly 50 meters in the pipe, which is not influenced by the elbows and makes it possible to test defects in long distance and large-scale. The water-load pipe experiment indicates that the displace and energy maybe leakage at the near-surface, which is significant for the further research.
3.In the r-t diagram, where t is the cosmic time and r is the radial co- ordinate defined as the proper radial distance divided by the scale factor, the locus of the incoming photon emitted at the big bang and reaching us now, r_(t), is a mirror image of the locus of the outgoing photon emitted at the big bang with r = 0, r+(t).
4.Exhibition economy is developing vigorously in China;Domestic exhibition industry has the big distance in the idea,the scale,the brand and so on,and it needs a large number of professional talents of high qualities to be the motivate for the development of the industry;How to constructs specialized person-raise pattern of multi-skill innovation talented.
6.This paper explores the successful experience of the Open University of the UK in characteristics of courses, system of teacher marking assignments and exams,test systems,learning methods, learning support services. It also raises the point of view that when the distance education is developing on a scale, we should stick to real opening, provide support service to open leaning with modern educational technology and stress the quality assurance of teaching.
8.Correct under the guiding of route, we successfully design and have trial-produced the one kind of new long large-scale camera of focal distance.
