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Structured Variational Inference in Continuous Cox Process Models

机译:连续COX过程模型中的结构化变分推理

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We propose a scalable framework for inference in a continuous sigmoidal Cox process that assumes the corresponding intensity function is given by a Gaussian process (GP) prior transformed with a scaled logistic sigmoid function. We present a tractable representation of the likelihood through augmentation with a superposition of Poisson processes. This view enables a structured variational approximation capturing dependencies across variables in the model. Our framework avoids discretization of the domain, does not require accurate numerical integration over the input space and is not limited to GPs with squared exponential kernels. We evaluate our approach on synthetic and real-world data showing that its benefits are particularly pronounced on multivariate input settings where it overcomes the limitations of mean-field methods and sampling schemes. We provide the state of-the-art in terms of speed, accuracy and uncertainty quantification trade-offs.
机译:我们提出了一种可扩展的框架,用于在连续的矩形Cox过程中推断推断,该过程假释通过以缩放的逻辑SIGMOID函数预先转换的高斯过程(GP)给出相应的强度函数。 我们通过增强级泊松过程的增强呈现可能的可能性。 此视图使结构化的变分近似捕获模型中变量的依赖性。 我们的框架避免了域的离散化,不需要在输入空间上准确数值积分,并且不限于带有平方指数核的GPS。 我们评估了我们对综合性和现实世界数据的方法,表明其优势在多变量输入设置上特别明显,其中克服了平均现场方法和采样方案的局限性。 我们在速度,准确性和不确定性量化权衡方面提供最先进的。

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