The development state and features of the stealth aircraft are introduced. Some stealth aircrafts, such as F-117,B-2,F-22 made in America and Mig 1.44,Su-35 mad e in Russia, are summarized. The development trend of stealth aircraft in the 21 st century is analyzed.
Base on analysis the characteristics and development state of safety management information system (MIS), this paper discuss the content include in mine safety MIS: safety information, safety analysis,accident prediction, safety evaluation.
The paper expounds the concept of the modern product data technology,analyses emphatically the importance and development state of the product data technology application and also the technology,economy and society significance of the modern product data technology.
This paper reviewed the present situation of Chinese main forestry products in international trade and analyzed its development state as well as its problems, then worked out 6 strategies for the development of Chinese forestry products in international trade.
Small diameter (>amp;lt;1.0-mm) Acer saccharum Marsh roots were separated into white, brown and woody development state classes and analyzed for total N and C concentrations in April, July and October of 1988.
Although there is no universally accepted theory and model, recent studies indicate that the wind stress strongly depends on the development state of sea waves, i.
In this paper, taking enterprise vitality as a target, an evaluation method of the economic development state of enterprise is proposed by using differential model.
The inventory of the conversion processes is based on the actual development state of the different technologies.
The drag coefficient depends to large extent only on wind speed and the wave development state.