摘要:This paper gives some properties of several special function discontinuity point and the first kind discontinuity point of ordinary real function.and points out their ap-plicaion in actual problems.
关键词:discontinuity point of the first kind;discontinuity point of the second kind;countable;monotone
摘要:Since the seventies,laser Doppler technique for measuring velocity has a new development: wide range and high resolution as researching shock wave of solid materials. The displacement interferometer was first used as researching shock wave. But the mea-surd velocity has a practical upper limit of about 200m/sec. To widen range of the interferometer velocity interferometer was later developed and the method of high velocity measurement was found out. However, velocity interferometer has a requirement of polished surface for measurd velocity body. This limits its practical application. Solved method is to introduce Wide-Angle Michelson Interferometer so as to utilize the diffuse light reflected from natural surface of a body: This is Velocity Interferometer System for any reflector,that is VISAR. VISAR is the best typical kind of laser Doppler velocity interferometer at present and is focal point in this paper.
摘要:Focus of this artidcle is to discuss the researching direction of the physics’ pedagogy and strive to expound its developping direction by the analysis to the practial and theoretical basis of its establishment.
关键词:the physics’ s pedagogy;practical and theoretical basis;reseaching direction
摘要:It is freguently meet to determine the connection group symbols of three -phase transformers in work and teaching. Sometimes, reference directions are uncertain and complicated. So they are difficult to be understood and mistakes are easy to be made. This paper sumes up the writer’ s teaching experiences of many years and proposes a new determining laws . It is practically proved that their effect is better.
摘要:PC-SUPREM and PC-SEDAN are the core of CAD system of microelectronics , are also the weak link of microelectronic industries in china. Some studies of author are discussed. Also, PC-SUPREM, PC-SEDAN and its application of microelectronic are overall introduced. Simulation for connection of SUPREM and SEDAN with computers is emphasized, so that amount of simulation information is extremely enhanced, and function of simulation of two svstems above is extremelv carrved out.
Li Huiqiang Central China Science and Engineering University
Issue 1, Pages: 83-88(1995)
摘要:In this article, the author trys to probe into the possibility of the early stage power survey of major diameter concrete-pouring stakes, its testing method and the calculation of the concrete ripeness of the stake body . According to experimental data, he also puts forward the calculating method and practical calculation formula of the concrete quasi-compressive resistance on the basis of the early ripeness of concrete and the speed of elastic waves.
关键词:pouring stake;ripeness of concrete;speed of elastic waves;concrete com-pressive resistance
摘要:This paper reveals the establishment and development of physical psychology and sports psychology, analysis the different and the ralation between them. This paper also makes a systematic explore on the basic concept, the research task, the research boundary, etc.