New Requirement of Modern Enterprise to PDM

In modern society, in order to make full use of information, enterprise not only communicates with interior, but also with the other enterprise. The old PDM (Product Data Management) system can not meet the requirement of enterprise in functions and ranges of management. To retrieve product data easily, the modern enterprises need to store product lifecycle information. At the same time, it is also necessary to expand the function of PDM, in order to share its network information, meet its requirement of collaborating design and make suppliers and partners expediently take part in the management of product data. Based on development of the PDM, this paper expatiates how to expand the old PDM for the modern enterprise.     

Epigenetic Reformation of Rock Mass in Dam Area of Xiluodu Hydropower Station

By investigating the space development rule of the epigenetic deformation and fracture trace and the combination pattern of epigenetic structure in dam area of Xiluodu hydropower station, the formation mechanism of epigenetic reformation is discussed in conjunction with the analysis of geologic physiological evolvement mechanism. Slaty rock mass structures which being made up of flat faults have played important role in controlling epigenetic reformation. The typical combination pattern of epigenetic structure is formed from steep dipping and flat faults. It is very important for understanding the feature of valley rockmass structure.     

Tool Path in Terms of NURBS Curves for Five-axis Sculptured Surface Machining Using Flat-end Tools

The method is adopted and developed to keep constant scallop-height in five-axis machining of NURBS surface using flat-end tools to get the CNC tool path. Then, based on the arithmetic of NURBS interpolation, the standard of NURBS during CAM is achieved. As a result, the CC points' quantity is greatly decreased and the problem that the CC path discontinuities of is overcome. Illustrative examples show the substantial improvements achieved over line-interpolation method for decreasing the amount of data on the condition of the same precision.     

Advanced Research on Pharmacology Value of the Extracts of Ginkgo Biloba Leaves

In these years, medicine value and clinical treatment value of extracts of the gmkgo biloba leares are studied deeply on home and abroad. With the growing development in the chemical inspect and chinical application, there are so many reports in domestic and abroad about the preparation technics, constituents analyse, pharmacological effects, toxicological experiments and clinical trials of ginkgo biloba leaves. There are kinds of flavonoids and terpenoids lactone in it, which have obrione protection and sechrity allepted by people in the world. A extensire prospect for application is manifested. The research progress of pharmacological effects of extracts of gmkgo bilobal. is summarized.     

Application Of Virtual Instrumentation in Radio Measuring System

Radio administration department permits station's building and distributes frequency used by measurement in radio electromagnetic environment. In order to improve the efficiency and accuracy of testing, the automatic measuring system software based on virtual instrumentation technology(VISA and SCPI) has developed at the VB platform, which changes the phase of outputting data just by printing spectrum chart .The system realizes functions of data sampling, transffering and processing in HP E7405A EMC analyzer. It also can establish database files for saving, inquirring, data shareing, exchanging and processing. The spectrum chart of mearsurment result is the same as that of result by manual work.     

牛胚胎移植技术在乌鲁木齐县的推广应用

为促进奶牛业的快速发展,加快地方良种扩群步伐,增加农牧民收入,更快改良乌鲁木齐地区土种牛,乌鲁木齐市畜牧兽医检疫草原工作总站于1997～2002年在乌鲁木齐县推广应用牛良种冷冻胚胎移植技术,现将结果报道如下.