Network Core Database System Design

Nuclear data are important and widely used in many fields such as the military, science research, and none-military applications. Currently, many countries, including USA, Russian, Japan, South Korea and of course China, devote many funds and people to study on nuclear data. The achievements are shared each other by international cooperation through IAEA.To conveniently communicate, the nuclear data have international standard formats. ENDF and EXFOR are the format for evaluated nuclear data library and experimental data library, respectively, which are common in the main nuclear data centers over the world.With the development of the computer technology, on-line service of the nuclear data becomes available, which are more efficient and convenient, and have been done in most nuclear data centers.China Nuclear Data Center (CNDC), a national nuclear data center and a main international nuclear data center, is in charge of the study, evaluation of the nuclear data works, and also the international cooperation. The NDS/IAEA hopes that CNDC could provide the on-line service, and hence the world wide online nuclear data network system can be set up. In the meantime, a project on "the service of the sharing of the science and technology data" has been started with the funding of the China Ministry of Science and Technology. CNDC joined this project and was in charge of the "Nuclear Physics Basic Data Library".While in the studies related to nuclear data, it is always needed to retrieve, make plots and compare the data from evaluations, experiments or calculations from different files with different formats. The formats are very complex. Though there are many standard computer programs for evaluated nuclear data files, there are no effective and convenient codes for experimental data. Generally, the special effective codes to plot the experimental data curves are still not available all over the world.In this work, we made a platform with related database to resolve the problems about the nuclear data sharing. The platform integrated a series programs, having the functions of data retrieve, conversion, plotting and comparison. The Client software is named TT. TT is a GUI (graphic user interface) platform, which are very easy and friendly to use. The total system included over 4GB data and more than 40,000 lines codes. With two database modes (BS and CS), this great scientific database system can be used in different requirement. As a convenient nuclear data treating system, it has been used not only the CNDC but also some other laboratories of our country.