Neutron activation cross section data library

To satisfy the requirements of nuclear reaction cross sections in nuclear engineering applications and nuclear physics studies,the Neutron Activation Cross Section Data Library has been established.818 target nuclei including unstable target or isomeric target nuclei are considered in this library.The induced neutron energy range region is between 10^(-5)eV and 20 MeV.The standard ENDF-6 format is adopted,including general information,reaction cross sections,multiplicities,and so on.The recommended reaction cross sections were obtained using UNF code system and FDRR nuclear model codes or systematic analysis based on available experimental data.

Integral Data Test of HENDL1.0/MG and VisualBUS with Neutronics Shielding Experiments (Ⅰ)

HENDL1.0/MG, a multi-group working library of the Hybrid Evaluated NuclearData Library, was home-developed by the FDS Team of ASIPP (Institute of Plasma Physics,Chinese Academy of Sciences) on the basis of several national data libraries. To validate andqualify the process of producing HENDL1.0/MG, simulating calculations of a series of existentspherical shell benchmark experiments (Al, Mo, Co, Ti, Mn, W, Be and V) have been performedwith HENDL1.0/MG and the multifunctional neutronics code system named VisualBUS home-developed also by FDS Team.

Integral Data Benchmark of HENDL2.0/MG Compared with Neutronics Shielding Experiments

HENDL2.0, the latest version of the hybrid evaluated nuclear data library, was developed based upon some evaluated data from FENDL2.1 and ENDF/B-VII. To qualify and validate the working library, an integral test for the neutron production data of HENDL2.0 was performed with a series of existing spherical shell benchmark experiments （such as V, Be, Fe, Pb, Cr, Mn, Cu, Al, Si, Co, Zr, Nb, Mo, W and Ti）. These experiments were simulated numerically using HENDL2.0/MG and a home-developed code VisualBUS. Calculations were conducted with both FENDL2.1/MG and FENDL2.1/MC, which are based on a continuous-energy Monte Carlo Code MCNP/4C. By comparison and analysis of the neutron leakage spectra and the integral test, benchmark results of neutron production data are presented in this paper.

Integral Data Test of HENDL1.0/MG with Neutronics Shielding Experiments (Ⅱ)

The multi-group working nuclear data library HENDL1.0/MG is numerically tested with a series of existent benchmark spherical shell experiments (Si, Cr, Fe, Cu, Zr and Nb) by calculations using the multi-functional neutronics code VisualBUS. The ratio of calculated/measured neutron leakage rates and the neutron leakage spectra are presented in tabular and figural forms. The results from the calculations with the code ANISN and IAEA data library FENDL2.0/MG were also included for comparison, where the origination of the data used is different from that of HENDL1.0/MG.

GITAR: An Open Source Tool for Analysis and Visualization of Hi-C Data

Interactions between chromatin segments play a large role in functional genomic assays and developments in genomic interaction detection methods have shown interacting topological domains within the genome. Among these methods, Hi-C plays a key role. Here, we present the Genome Interaction Tools and Resources(GITAR), a software to perform a comprehensive Hi-C data analysis, including data preprocessing, normalization, and visualization, as well as analysis of topologically-associated domains(TADs). GITAR is composed of two main modules:(1)HiCtool, a Python library to process and visualize Hi-C data, including TAD analysis; and(2)processed data library, a large collection of human and mouse datasets processed using HiCtool.HiCtool leads the user step-by-step through a pipeline, which goes from the raw Hi-C data to the computation, visualization, and optimized storage of intra-chromosomal contact matrices and TAD coordinates. A large collection of standardized processed data allows the users to compare different datasets in a consistent way, while saving time to obtain data for visualization or additional analyses. More importantly, GITAR enables users without any programming or bioinformatic expertise to work with Hi-C data. GITAR is publicly available at http://genomegitar.org as an open-source software.

基于GDAL库和Teigha库的坐标转换系统设计与实现

坐标转换是空间地理数据应用的常用功能,由于部门及应用场景不同,不同坐标系成果的相互转换工作将长期存在。目前的坐标转换不仅需要脱离ArcGIS和AutoCAD等软件,还要实现主流矢量数据和栅格数据的坐标转换。为此提出了基于GDAL(geospatial data abstraction library)和Teigha库底层开发的通用坐标转换方法,给出了系统架构,实现了参数管理、参数计算、坐标转换、数据读写等功能。该方法大大提高了转换效率和保密性。实践表明,该系统转换结果正确可靠。