中文说明：热扩散是一种物理现象。在介质中，热总是从温度较高的位置的流动与低温度的位置。最近热扩散的方法已成功应用等分类的各种领域和维数减少问题。拉弗蒂 和黎巴嫩近似热内核中的为在一个封闭的形式，从哪个伟大的多项式家庭的改善取得了对高斯的使用或线性的内核。
English Description：
Heat diffusion is a physical phenomenon. In a medium,heat always flows from a position with high temperature to a position with low temperature.Recently heat diffusion-based approaches have been successfully appliedin various domains such as classification anddimensionality reduction problems . Lafferty and Lebanon approximated the heat kernel for a multinomial family in a closed form, from which great improvements were obtained over the use of Gaussian or linear kernels.