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arXiv 1502.01856astro-ph.COastro-ph.IM
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PolyChord:宇宙学的嵌套抽样

PolyChord: nested sampling for cosmology

W. J. Handley, M. P. Hobson, A. N. Lasenby

摘要:

PolyChord是一种新的适用于高维参数空间的嵌套采样算法。此外,它可以充分利用参数速度的层次结构,如在CosmoMC和CAMB中发现的。它利用切片采样在每一次迭代内的嵌套采样的硬似然约束的样本。它可以识别和发展后半独立的独立模式,并使用openMPI并行化。PolyChord可从以下网址下载:http://ccpforge.cse.rl.ac.uk/gf/project/polychord/

英文摘要:

PolyChord is a novel nested sampling algorithm tailored for high dimensional parameter spaces. In addition, it can fully exploit a hierarchy of parameter speeds such as is found in CosmoMC and CAMB. It utilises slice sampling at each iteration to sample within the hard likelihood constraint of nested sampling. It can identify and evolve separate modes of a posterior semi-independently and is parallelised using openMPI. PolyChord is available for download at: http://ccpforge.cse.rl.ac.uk/gf/project/polychord/

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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