Researches and Developments on Power Compacting Technology.

Researches on High Power Locomotive Wheel-set Online Inspection with Phased Array Ultrasonic Technology

Traditional online wheel-set ultrasonic inspection method and inspection technology can not meet the new requirement of High Power Locomotive wheel-set online. In this article, features of locomotive wheel and defect distribution are analyzed, and a more strictly online inspection requirement is put forward. Based on which, an optimized multi arrangement of phased array and conventional ultraso...

GIS Infrastructure in Japan — Developments and Algorithmic Researches

Some activities of geographical data maintenance and standardization work in GIS infrastructures in Japan are first reviewed. Then, from the viewpoint of geometric and combinatorial algorithmics, applied aspects of GIS are described. Some spatial data mining technique is mentioned first, and then the problem of inferring topological information from digital map and the label placement problem a...

Recent Developments in Compound Semiconductor Microwave Power Transistor Technology

This paper addresses the state-of-the-art in microwave and millimetre-wave power transistor technology. The relative performance of microwave power transistor technology from 1 GHz to 60 GHz is reviewed. The fundamental technological drivers in the design of microwave compound semiconductor power transistors are discussed as the basis for developing optimum designs. A new high yield power GaAs ...

Machining Technology Developments

Some Researches on Histones

The histone extracted from calf thymus glands is a complex system of proteins, which can be fractionated by chromatography on carboxymethyl cellulose columns into three principal fractions (1) very lysine-rich, (2) moderately lysine-rich, (3) arginine-rich. When examined by starch gel chromatography each of these gives more than one band. Methods have been devised for further separation of the ...