图 书 馆
用于宇宙模拟的多暗数据库The MultiDark Database for cosmological simulations |
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| 课程网址: | http://videolectures.net/nipsworkshops2011_favole_database/ |
| 主讲教师: | Ginevra Favole |
| 开课单位: | 安达卢西亚天体物理学研究所 |
| 开课时间: | 2012-01-23 |
| 课程语种: | 英语 |
| 中文简介: |  我们向在线MultiDark数据库提供了一个面向虚拟天文台的关系数据库，用于托管各种宇宙模拟。可以通过SQL（结构化查询语言）查询界面访问数据，该界面还允许用户直接提出科学问题。有关数据库用法的更多示例，请参见其广泛的在线文档。该数据库与千年数据库基于相同的技术，这一事实将极大地促进这两种宇宙模拟套件的使用。 MultiDark数据库的第一个版本包含两个86亿个粒子宇宙学N体模拟：Bolshoi（250h ^ -1 M pc模拟盒，1h ^ -1 kpc分辨率）和MultiDark Run1模拟（MDR1或BigBolshoi 1000h ^ -1） M pc模拟盒，分辨率为7h ^ -1 kpc）。本文介绍了从原始模拟数据中提取光晕/半光晕的方法，以及如何在数据库中构造此数据。在第一个数据发布中，用户可以完全访问光晕/半光晕目录，红移z = 0 15时的光晕的各种轮廓以及莫斯科大剧院一个时间步长和MultiDark模拟的四个时间步长的原始暗物质数据。以后的版本还将包括银河模拟目录和用于模拟以及高分辨率的新大容量模拟的其他合并树。该项目进一步证明了使用关系数据库技术存储和呈现复杂数据的可行性。我们鼓励其他模拟器以类似的方式发布其结果。 |
| 课程简介: | We present the online MultiDark Database - a Virtual Observatory-oriented, relational database for hosting various cosmological simulations. The data is accessible via an SQL (Structured Query Language) query interface, which also allows users to directly pose scientic questions. Further examples for the usage of the database are given in its extensive online documentation. The database is based on the same technology as the Millennium Database, a fact that will greatly facilitate the usage of both suites of cosmological simulations. The first release of the MultiDark Database hosts two 8.6 billion particle cosmological N-body simulations: the Bolshoi (250h^−1 M pc simulation box, 1h^−1 kpc resolution) and MultiDark Run1 simulation (MDR1, or BigBolshoi, 1000h^−1 M pc simulation box, 7h^−1 kpc resolution). The extraction methods for halos/subhalos from the raw simulation data, and how this data is structured in the database are explained in this paper. With the first data release, users get full access to halo/subhalo catalogs, various proles of the halos at redshifts z = 0 15, and raw dark matter data for one time-step of the Bolshoi and four time-steps of the MultiDark simulation. Later releases will also include galaxy mock catalogs and additional merging trees for both simulations as well as new large volume simulations with high resolution. This project is further proof of the viability to store and present complex data using relational database technology. We encourage other simulators to publish their results in a similar manner. |
| 关 键 词: | 宇宙模拟; 数据库 |
| 课程来源: | 视频讲座网 |
| 数据采集: | 2020-09-28：zkj |
| 最后编审: | 2020-10-22：zyk |
| 阅读次数: | 39 |